07th week of 2009 patent applcation highlights part 31 |
Patent application number | Title | Published |
20090041047 | TEST DEVICE AND A TEST METHOD - A test device and a test method, the test device comprising a bus controller for the transmission and reception of bus messages, the bus controller having a message memory for offering transmission data for bus messages, the message memory having a memory capacity for a bus message sequence with bus messages to be transmitted within a single transmission cycle or a transmission cycle sequence. The test device includes an intermediate memory for the storage of transmission data for bus messages with a larger storage capacity than the message memory. The test device furthermore comprises a transmission preparing means for reading transmission data from the intermediate memory and for writing, in advance of reading of the bus controller, to the message memory of the bus controller so that the bus message sequence is expanded by additional bus messages which are transmitted by the bus controller within the transmission cycle or the transmission cycle sequence on the motor vehicle bus. | 2009-02-12 |
20090041048 | SYSTEM AND METHOD FOR PERSONAL LIVE TELEVISION - A system comprising a receiver and a transmitter for sending and receiving audio-video datastreams through fixed IP addresses, which IP addresses are established upon initialization of the transmitter and receiver systems. The transmitter includes an audio-visual capture and encoding subsystems, and the receiver includes an audio-visual decoding and display subsystems. | 2009-02-12 |
20090041049 | LOAD BALANCING FOR COMMUNICATIONS WITHIN A MULTIPROCESSOR COMPUTER SYSTEM - In a system having a N output ports, wherein N is an integer greater than one, a method of distributing packets across the plurality of output ports. A packet having two or more fields is received and a first number is computed as a function of one or more of the plurality of fields. A second number is computed that is modulo base N of the first number and an output port is selected as a function of the second number. | 2009-02-12 |
20090041050 | Adaptive medium access control for wireless communication system - A method is provided for adapting a contention window for a given node in a wireless communication system. The method includes: defining a target parameter indicative of congestion on a transmission medium; determining a number of transmitting nodes ready to access the transmission medium; and determining a contention window from which to select a delay value for transmitting over the transmission medium, where the contention window is a function of the target parameter and the number of transmitting nodes. | 2009-02-12 |
20090041051 | ENHANCED COMMUNICATION NETWORK TAP PORT AGGREGATOR ARRANGEMENT AND METHODS THEREOF - An arrangement in a network device for facilitating at least one of multiple connection speeds with a network, active response between a monitoring device and an end-device, and power over Ethernet (POE) over a network is provided. As a facilitator of multiple connection speeds, the arrangement includes a plurality of physical layer interface (PHY) and media access controller (MAC) that are configured to support multiple speeds. As a facilitator of active response, the arrangement includes a logic arrangement for multicasting a set of instructions that is sent from a monitoring port. As a facilitator of POE, the arrangement is configured to receive data traffic (e.g., data packets and/or power packets) through a first network port and to send the data traffic out a second network port. | 2009-02-12 |
20090041052 | SYSTEMS AND METHODS FOR PROVIDING UNIFIED COLLABORATION SYSTEMS WITH USER SELECTABLE REPLY FORMAT - A communication system provides integrated email, telephone and instant messenger communication including a common address book, a common log of communication history and shared presence information. A user can respond to a communication according to any format, email, telephone or instant messenger, with a response using the same format or any other format. The response may be initiated by a single command. | 2009-02-12 |
20090041053 | TIME-OFFSET REGULATED METHOD AND SYSTEM FOR SYNCHRONIZATION AND RATE CONTROL OF MEDIA DATA - A method and a device for performing the method, are presented. According to the method at a step a reference time is received. At a further step an offset time using the reference time and a local time is computed. At another step a media data is received. At a yet another step the offset time on the media data is stamped and at still another step the media data is received into a first buffer and made available for processing substantially immediately. At a subsequent step the media data may be supplied to a sink unit according to the stamped offset time, the local time and an associated time. | 2009-02-12 |
20090041054 | METHOD OF NETWORK COMMUNICATION, AND NODE AND SYSTEM EMPLOYING THE SAME - A method of network communication includes employing a communication network protocol stack with a plurality of independent communication layers providing a plurality of different corresponding services. A plurality of circular communication buffers are employed. A buffer manager is employed for the circular communication buffers, the buffer manager being independent of the independent communication layers. One of the circular communication buffers is requested from the buffer manager by one of the independent communication layers. A plurality of different operations are provided in the buffer manager to read first data from or write second data to such one of the circular communication buffers for a number of the independent communication layers. | 2009-02-12 |
20090041055 | Radio apparatus, radio communication system, and radio information notification method - MAC entity produces a single PDU in such a way that two or more SDU's, which are received from RLC entity via logical channels, are integrated, and header H and MAC control information CONT are added. Transmission order information (time stamp TS) is added to the PDU. The PDU including the transmission order information is transferred to a transport channel, and then transmitted on a radio basis to an apparatus of the other party. | 2009-02-12 |
20090041056 | Radio transmission apparatus, radio receiving apparatus, radio communication apparatus, radio transmission method and radio receiving method - Instead of adding control information that should be passed on to two or more RLC entities or two or more PDCP entities on the counterpart side to data respectively in two or more RLC entities or two or more PDCP entities at the sending end, control information is added in MAC entity and then distributed to two or more RLC entities in MAC entity on the counterpart side. | 2009-02-12 |
20090041057 | PERFORMING A RECOVERY ACTION IN RESPONSE TO A CREDIT DEPLETION NOTIFICATION - Provided are a method, system, and program for managing communication between a first device and a second device and performing a recovery action at the second device in response to a credit depletion notification from the first device. The second device assigns credits indicating a number of outstanding frames the first device may transmit to the second device. The second device receives a first type or second type of credit depletion notification from the first device indicating that the first device needs additional credits to transmit further frames to the second device. The second device performs one of a plurality of recovery actions depending on whether the first type or second type of credit depletion notification was received. | 2009-02-12 |
20090041058 | NETWORK SYSTEM AND AN INTERWORKING APPARATUS - An internetwork arrangement including: a prefix request unit for requesting an IPv6 address prefix from each of one or more first internetwork apparatuses; a prefix generation unit for generating a second prefix required to create an IPv6 address in the user apparatus utilizing a service, the second prefix having a length different from that of said IPv6 address prefix, on the basis of each of the one or more arbitrary IPv6 address prefixes, which differ for every service, given as notice by said one or more first internetwork apparatuses; and a prefix sending unit for giving notice of one or more generated second prefixes to the connected user apparatus utilizing said service. | 2009-02-12 |
20090041059 | TRANSMISSION AND RECEPTION SYSTEM AND METHOD BASED ON CODE DIVISION - The code division (CDMA) transmission method includes the step of multiplying a signal (a) to be transmitted, represented by a vector, by a matrix (S), whose result is represented by a vector (x), said method being characterized in that: • taking a basic sequence with substantially-ideal periodic autocorrelation; • constructing said matrix (S) by a cyclical translation of said basic sequence, in such a way that the columns of said matrix (S) are the cyclical shifts of the basic sequence; • adding a cyclic prefix to said resulting vector (x). | 2009-02-12 |
20090041060 | Cross Link Multiplexer Bus - A cross link multiplexer bus comprising a plurality of cross link multiplexers and a plurality of interconnects. The plurality of cross link multiplexers has a destination port configured to receive a signal and an origin port configured to produce the signal. The plurality of interconnects has a set of interconnects coupled between a pair of adjacent cross link multiplexers. Preferably, the destination port is in a first cross link multiplexer, the origin port is in a second cross link multiplexer, and the first cross link multiplexer is configured to convey the signal toward the second cross link multiplexer in more than one direction. In an embodiment, the signal is capable of being represented as a series of characters, and a character is capable of being represented as a number of bits. Preferably, the plurality of cross link multiplexers includes a delay buffer to delay conveyance of a first bit so that it remains substantially synchronized with a second bit. Preferably, the set of interconnects includes a first interconnect to convey the first bit and a second interconnect to convey the second bit. The lengths of the first and the second interconnects are substantially equal. | 2009-02-12 |
20090041061 | Method and apparatus for generation and amplification of light in a semi-guiding high aspect ratio core fiber - A planar laser gain medium and laser system. The novel laser gain medium includes an active core having a high aspect ratio cross-section with a fast-axis dimension and a slow-axis dimension, signal claddings adapted to form reflective boundaries at fast-axis boundaries of the core, and a material adapted to minimize reflections at slow-axis boundaries of the core. In an illustrative embodiment, the laser gain medium is an optical fiber. The core and claddings form a waveguide adapted to control modes propagating in the fast-axis direction. When the laser gain medium is employed as a laser oscillator, a high reflectivity mirror and an outcoupler are positioned at opposite ends of the core to form a laser resonator adapted to control modes in the slow-axis direction. | 2009-02-12 |
20090041062 | FIBER-BASED TUNABLE LASER - A fiber-based tunable laser includes a spectrum-expansion device comprising a micro structured fiber configured to receive a pump laser pulse having a first band width and a first pulse energy, and to produce a spectrally expanded laser pulse having a second band width at least two times broader than the first band width. The fiber-based tunable laser also includes a combiner that can couple the pump laser pulse into the spectrum-expansion device and a filter that can select a signal laser wavelength within the second band width and to produce a signal laser pulse at the signal laser wavelength. The signal laser pulse has a third band width narrower than the second band width. One or more cavity fibers allow propagation of the spectrally expanded laser pulse and the signal laser pulse between the spectrum-expansion device and the filter. | 2009-02-12 |
20090041063 | FIBER LASER APPARATUS - In a fiber laser apparatus that uses a rare earth added fiber as a light amplifying medium of a resonator or amplifier, the rare earth added fiber is a photonic bandgap fiber in which a rare earth element has been added to a core. Moreover, the loss when the rare earth element absorption portion is excluded from the transmission loss in this photonic bandgap fiber is such that the transmission loss in the wavelength of primary Stokes light that is generated by induced Raman scattering is greater than the transmission loss in the wavelength of light that is output by the fiber laser apparatus. According to the present invention, it is possible to provide a fiber laser apparatus that suppresses the generation of Raman light created by induced Raman scattering, and suppresses the amplification of secondary Stokes light, and is able to efficiently amplify the power of the signal light that is the amplification target. | 2009-02-12 |
20090041064 | Higher Order Mode Optical Fiber Laser or Amplifier - A method of producing higher power optical energy with an optical fiber can include providing a length of optical fiber having a core constructed so as to support more than one mode at a selected wavelength, the length of optical fiber comprising an active material for providing optical gain at the selected wavelength responsive to optical pumping, said optical gain being provided to the optical energy while propagating in at least one higher order mode of the core; providing a length of output optical fiber having a core; and providing for optical communication between the length of optical fiber and the core of the length of output optical fiber wherein the optical energy from the core of the length of optical fiber that experiences optical gain while propagating in at least one of the at least one higher order modes is communicated to the fundamental mode of the core of the length of output optical fiber. | 2009-02-12 |
20090041065 | Liquid Crystal Device - A tuneable laser device comprises first and second cell walls enclosing a layer of a liquid crystal material having a helical axis substantially normal to the inner surfaces of the cell walls in the absence of an applied field. The liquid crystal contains a fluorescent, phosphorescent, luminescent or rare-earth dye. The device includes electrodes for applying a transverse electric field substantially normal to the helical axis. The invention also provides a method of electrically adjusting the peak wavelength of a photonic band edge laser comprising a chiral nematic liquid crystal material having a helical axis and a fluorescent, phosphorescent, luminescent or rare-earth dye therein and optically pumped by a suitable light source. The method comprises applying an electric field substantially perpendicular to the helical axis so as to deform the helix by means of the flexoelectric effect. | 2009-02-12 |
20090041066 | Fast continuously wavelength tuning single frequency fiber laser using tunable polymer optical filters - A method for generating a laser projection by employing a laser gain medium for receiving an optical input projection from a laser pump. The method further includes a step of employing a mode selection filter comprising an electro-optical (EO) tunable layer disposed between two parallel reflection plates for generating a laser of a resonant peak. | 2009-02-12 |
20090041067 | Engineered nonlinear optical crystal composites for frequency conversion - Walk-off corrected (WOC) non-linear optical (NLO) components, devices and systems including one or more engineered WOC NLO crystal doublets. Such systems and devices advantageously increase the efficiency of an OPO operation. Devices are applicable to any uniaxial and biaxial NLO crystals in a wide range of wavelengths, e.g., from far ultraviolet to visible to far infrared. Devices employing engineered WOC NLO components according to embodiments of the present invention include any conventional frequency converting architectures. Systems and methods are also provided to unambiguously determine and correct walk-off for any arbitrary uniaxial and biaxial crystal orientation. The correct crystal orientation is also experimentally confirmed. This allows the use of WOC crystal doublet assemblies for a wide range of wavelengths and NLO crystals that until now have not been used because of low efficiency due to walk-off and inability of readily correcting walk-off. | 2009-02-12 |
20090041068 | Single-frequency monolithic linear laser device and system comprising same - A laser device includes: an amplifying medium ( | 2009-02-12 |
20090041069 | SEMICONDUCTOR LASER, LIGHT SOURCE DEVICE, LIGHTING DEVICE, PROJECTOR, AND MONITOR DEVICE - A light source device includes a semiconductor laser, and a drive circuit supplying the semiconductor laser with a pulsed drive current, and in the semiconductor laser, a laser emitting element and a free wheel diode are formed on the same substrate, and a cathode of the free wheel diode is connected to a current input terminal of the laser emitting element, and an anode of the tree wheel diode is connected to a current output terminal of the laser emitting element. | 2009-02-12 |
20090041070 | OPTICAL SCANNING DEVICE AND COMPONENT THEREOF - To provide an optical scanning device capable of scanning with a simple configuration. | 2009-02-12 |
20090041071 | CONTROL CIRCUIT FOR A LASER DIODE AND A METHOD TO CONTROL A LASER DIODE - A control circuit for a laser diode is disclosed, in which the driving current may be suppressed even when the monitor PD breaks down to make the APC feedback control inoperable. The control circuit comprises an LD driver to supply the driving current to the LD, a monitor PD to detect a portion of output light from the LD, and the APC controller to adjust the driving current. The current limiter, when the driving current reaches or exceeds the threshold, controls the driving current Id so as to keep the current in a preset value or a value just before the extraordinary increase of the driving current occurs. | 2009-02-12 |
20090041072 | OPTICAL COMMUNICATION MODULE AND OUTPUT CONTROL METHOD OF SEMICONDUCTOR LASER - An optical communication module includes a semiconductor laser drive circuit configured to supply a drive current to a semiconductor laser so as to output a laser beam; a drive control section configured to control the semiconductor laser drive circuit based on an ambient temperature of the semiconductor laser such that the output light beam has a predetermined light level, and the drive current falls within a predetermined range. A light quantity adjusting section removes a part of the laser beam to produce an output light beam from a remaining portion of the laser beam when the laser beam passes through the light quantity adjusting section, and a quantity of the removed apart of the laser beam depends on a wavelength of the laser beam and an ambient temperature of the semiconductor laser. | 2009-02-12 |
20090041073 | DBR LASER WITH IMPROVED THERMAL TUNING EFFICIENCY - A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof The waveguide having a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller electrically configured to adjust optical properties of the waveguide by controlling power supplied to the heating element. | 2009-02-12 |
20090041074 | Passivation of Vertical Cavity Surface Emitting Lasers - A vertical cavity surface emitting laser including a substrate, a plurality of epitaxial layers formed on the substrate as an epitaxial stack, and a passivation layer at least partly covering the epitaxial stack including a plurality of sublayers at least some of which are composed of different materials. The composition and thicknesses of the sublayers are chosen to minimise the overall stress of the passivation layer and thereby to increase a mean time before the vertical surface emitting laser fails. | 2009-02-12 |
20090041075 | Surface-emitting type semiconductor optial device and method for manufacturing a surface-emitting type semiconductor optical device - A surface-emitting type semiconductor optical device includes: a first DBR portion of a first conductivity type provided on a GaAs substrate of the first conductivity type; an active layer provided on the first DBR portion; a second DBR portion provided on the active layer; a mesa-shaped conductive layer, which is provided between the first DBR portion and the second DBR portion, and which has, embedded therein, a current confinement portion for supplying current to the active layer; and a burying layer comprising single undoped GaInP and provided between the first DBR portion and the second DBR portion, on the side faces of the conductive layer. The resistivity of the undoped GaInP in the surface-emitting type semiconductor optical device is not lower than 10 | 2009-02-12 |
20090041076 | Opto-semiconductor devices - An opto-semiconductor device. An opto-semiconductor element includes a semiconductor substrate, a multilayered semiconductor layer formed on a first surface of the semiconductor substrate and having a resonator, a first electrode with multiple conductive layers formed on the multilayered semiconductor layer, and a second electrode formed on a second surface of the semiconductor substrate. A support substrate has a first surface formed with a fixing portion having a conductive layer for fixing the first electrode connected thereto through a bonding material. Bonding material and conductive layers forming the first electrode react to form a reaction layer. The difference in thermal expansion coefficient between semiconductor substrate and support substrate is not more than 50%. A second barrier metal layer not reactive with bonding material is formed inside the first electrode uppermost conductive layer, while uppermost layer reacts with the bonding material to form the reaction layer. | 2009-02-12 |
20090041077 | OPTICAL READ-OUT - An arrangement for read-out of information from an optical information carrier is disclosed. The system comprises a VCSEL for improving the signal-to-noise ratio of light reflected from and modulated by an information carrier. The VCSEL has a substrate that transmits the emission from the active regions of the VCSEL. Thereby, the need for beam-splitters in the detection branch of the device is completely eliminated. | 2009-02-12 |
20090041078 | METHODS AND APPARATUS FOR MONITORING A CONDITION OF A MATERIAL - Apparatus, methods, and articles of manufacture for monitoring a condition of a material are disclosed. In particular, the example apparatus, methods, and articles of manufacture emit a first acoustic signal into a wall of the tubular member having a first temperature value and obtain a first propagation time associated with the first acoustic signal. In addition, a second acoustic signal is emitted into the wall having a second temperature value and a second propagation time associated with the second ultrasonic acoustic signal is obtained. The second temperature value is determined based on the first temperature value and the first and second propagation times. | 2009-02-12 |
20090041079 | Bidirectional and Expandable Heat Flow Measurement Tool for Units of Air Cooled Electrical Equipment - A tool is disclosed, for measuring the important thermal characteristics of a unit of electronic equipment, which obtains air flow and temperature readings at both air inlet and air outlet openings of the unit without disturbing cable or wiring connections or otherwise interrupting device operation. The tool pressure sensing element is rotatable between detented positions to permit the tool to be used at both air inlet and air outlet openings. The tool air duct portion may be formed of separate duct portions to enable a single duct portion including the sensing instrumentation to be used with multiple duct portions that conform to electronic device air inlet and outlet openings to impart added flexibility to the tool. | 2009-02-12 |
20090041080 | TEMPERATURE-MEASURING DEVICE FOR A RESPIRATION HUMIDIFIER - A contactless temperature-measuring device especially for a respiration humidifier with a flow channel for breathing gas, which is improved in respect to handling and reliability of measurement. The device includes: a hollow body ( | 2009-02-12 |
20090041081 | COMBINED PRESSURE/TEMPERATURE SENSOR HAVING CENTRIC TEMPERATURE MEASUREMENT - The present invention relates to a combined pressure and temperature sensor ( | 2009-02-12 |
20090041082 | POWER SUPPLY TEMPERATURE SENSOR AND SYSTEM - A power supply temperature sensor and system includes a power supply housing configured to receive at least one power supply unit, such as a battery cell. The power supply housing includes an aperture which provides communication between the battery cell and an ambient environment outside the power supply housing. A sensor having a sensing element is configured to sense a temperature of the battery cell, and a sensor housing surrounds at least a portion of the sensor, including at least a portion of the sensing element. This electrically isolates the sensing element from the battery cell. A portion of the sensor housing is configured to be disposed through the aperture in the power supply housing to make contact with the battery cell to facilitate conductive heat transfer between the battery cell and the sensor housing, thereby facilitating an accurate measurement of the temperature of the battery cell. | 2009-02-12 |
20090041083 | Temperature sensitive, color changing pharmaceutical bottle cap - Temperature-sensitive, color-changing inks, paints and resin concentrate additives are mixed into a child-resistant cap or lid to produce color changes indicative of its bottle having been recently opened and the medication within having been previously taken. | 2009-02-12 |
20090041084 | TEMPERATURE MEASUREMENT DEVICE THAT ESTIMATES AND COMPENSATES FOR INCIDENT RADIATION - A temperature measurement device includes a first thermocouple mounted on a tubular body that is shielded from the effects of radiation by a radiation shield, and a second, unshielded thermocouple. A difference in the measured temperatures from the first and second thermocouples is compared with calculated temperatures using an iterative process to determine a corrected temperature of the gas stream that estimates and compensates for incident radiation. | 2009-02-12 |
20090041085 | Temperature responsive systems - A shape memory material activated device of the present invention uses a shape memory material activator to create a path through a shell wall of the device. The path through the shell wall may release a substance contained in the shell or allow a substance to enter the shell. The path may be created by fracturing, puncturing, exploding, imploding, peeling, tearing, stretching, separating, debonding, abrading or otherwise opening the shell and, may be permanent or reversible. The substance may be released in one location while the device is stationary or along a path while it is traveling, self-powered by the shape memory material activator. In addition, the substance may be delivered to an object upon contact with its surface. The self powering abilities allow these devices to be used as substance delivery devices as well as actuators, transporters, and energy conversion systems with modular characteristics and growth potential. The devices may be armed, prior to the beginning of their service life, to be placed in a state of readiness to release their substances once the path is created. Prior to arming they may be maintained at any temperature, incapable of releasing their substances. The devices according to the present invention may be used as temperature sensors or warning devices, drug delivery devices, and the like. | 2009-02-12 |
20090041086 | Furnace temperature monitoring device and method - A method for measuring the temperature at various locations in a furnace adapted to heat-treat a metal part commences by placing one or more devices at various location within the furnace. Each device is an inorganic/metallic skeletal structure residual from firing a mixture of binder and one or more of inorganic or metallic particles at a temperature that chars the binder to form the inorganic/metallic skeletal structure of a determined shape. A physical parameter of the skeletal structure determined shape is monitored after firing of the furnace. Then, the monitored physical parameter is compared to a plot of temperature versus the physical parameter to determine the temperature of the furnace at the various locations. | 2009-02-12 |
20090041087 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - Transmission data spread over a frequency domain and a time domain is efficiently received. When a spread signal is received, if the SNR exceeds a predetermined value, it is determined that a despreading process is not necessary for all blocks, and a block selection flow is started. If a block having a channel estimation result indicating that a decoding process is possible without despreading is present, only that block is subjected to the decoding process, and despreading processes over the frequency domain and time domain are terminated. Moreover, when decoding is performed by despreading only some of the blocks, the despreading process over the frequency domain is preferentially performed so as to efficiently terminate FFT with regard to the spread signal over the time domain for which despreading is not performed. | 2009-02-12 |
20090041088 | METHODS AND APPARATUSES FOR CHANNEL ASSESSMENT - An embodiment of an apparatus for channel assessment is provided, comprising a radio frequency (RF) unit, a baseband unit and a microprocessor control unit (MCU). The baseband unit coupling to the RF unit directs the RF unit to selectively hop into one of a plurality of available channels in a frequency band using a pseudorandom sequence to receive a plurality of packets via the hopped channel. The MCU coupling to the baseband unit accumulates a measure for the hopped channel according to reception results of the packets and marks the hopped channel as a bad channel when the accumulated measure exceeds a predetermined threshold. The measure represents the inaccuracy extent during packet reception via the hopped channel. | 2009-02-12 |
20090041089 | SHARED CORRELATOR FOR SIGNALS WITH DIFFERENT CHIP RATES AND CORRELATION METHOD THEREOF - Disclosed is a shared correlator for processing signals with different chip rates from respective channels. The shared correlator comprises a mode controller, a plurality of sub-correlators, a PRN code generator and a plurality of accumulators. The mode controller arranges channel allocations for respective IF signals down converted from the signals. The PRN code generator generates respective PRN codes for the respective IF signals according to the respective chip rates thereof. The sub-correlators perform correlation to the respective IF signals with the respective PRN codes to obtain respective correlating results. The accumulators accumulate the respective correlation results to obtain respective overall correlation gains of the respective IF signals according to the respective chip rates. Each sub-correlator comprises a plurality of correlator cells, correlating one IF signal with one PRN code corresponding thereto according to the chip rate of the IF signal. | 2009-02-12 |
20090041090 | METHOD FOR TRANSMITTING SIGNALS USING ANTENNA DIVERSITY, FOR INSTANCE IN MOBILE COMMUNICATION SYSTEMS, TRANSMITTER, RECEIVER AND COMPUTER PROGRAM PRODUCT THEREFOR - Encoded digital symbols are transmitted via a first pair of antennas and at least one second pair of antennas. The sets of symbols used for the transmission via the second pair of antennas are re-ordered temporally into subsets of symbols with respect to the symbols used for the first pair of antennas. For the first pair of antennas, there is used a signal subjected to encoding with a code-division-multiple-access code and subjected to spreading with a spreading code, and, likewise, for the second pair or pairs of antennas there are used signals subjected to encoding with respective code-division-multiple-access code and subjected to spreading with a respective spreading code. At least one between the respective code-division-multiple-access code and the respective spreading code used for the transmission via the second pair of antennas is different from the code-division-multiple-access code and from the spreading code used for the transmission via the first pair of antennas. The solution can be extended to the use of a plurality of second pairs of antennas in transmission and/or to the use of a plurality of antennas in reception. | 2009-02-12 |
20090041091 | Receiver with the function of adjusting clock signal and an adjusting method therefor - A receiver having a first clock signal is provided. The first frequency of the first clock signal is adjusted to be close to a second frequency of a second clock signal of a transmitter. The receiver includes a clock generator, a processor and a controller. The clock generator is for generating the first clock signal. The processor is for outputting a first control signal to control the clock generator to adjust the first frequency to be close to the second frequency when an absolute value of a current difference between the first and the second frequencies at a current time point is larger than a threshold. The controller is for outputting a second control signal to control the clock generator when the absolute value of the current difference is smaller than the threshold, so as to reduce the load of the processor. | 2009-02-12 |
20090041092 | METHOD FOR TRANSMITTING AND RECEIVING DATA IN A MULTI-CARRIER SYSTEM - A method of transmitting data in a multi-carrier communication system is disclosed. More specifically, the method includes mapping at least one data symbol to at least one subcarrier of a first frequency domain and at least one data symbol to at least one subcarrier of a second frequency domain, wherein the first frequency domain and the second frequency domain are mutually exclusive and the at least one data symbol mapped to the at least one subcarrier of the second frequency domain is multiplied by a spreading code, transforming the at least one data symbol mapped to the first frequency domain and the at least one data symbol mapped to the second frequency domain by an inverse discrete Fourier transform (IDFT) module, and transmitting the transformed data symbols to a receiving end. | 2009-02-12 |
20090041093 | TIME-TRACKING MANAGEMENT OF DEMODULATION ELEMENTS IN A RECEIVE DIVERSITY ENABLED RAKE RECEIVER - A rake receiver comprises a plurality of receive antennas and a processing system. Each receive antenna has a plurality of demodulation elements. The processing system is configured to assign a plurality of demodulation elements from a plurality of receive antennas to a multipath group, assign the multipath group to a multipath signal, and independently adjust a time delay value of each demodulation element in the multipath group to correspond to a local time delay of the multipath signal at the corresponding receive antenna. | 2009-02-12 |
20090041094 | SIGNAL RECEIVING APPARATUS INCLUDING EQUALIZER, TERMINAL APPARATUS, SIGNAL RECEIVING METHOD, AND SIGNAL RECEIVING PROGRAM - A signal receiving apparatus which can reduce a circuit scale to reduce a cost in a mobile wireless communication system which transmits and receives a spread spectrum signal is provided. | 2009-02-12 |
20090041095 | METHOD AND APPARATUS FOR FINE FREQUENCY SYNCHRONIZATION IN WIRELESS BROADBAND (WIBRO) SYSTEM WITHOUT USING GLOBAL POSITIONING SYSTEM (GPS) RECEIVER - Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a frequency offset, in a base station or a wireless repeater without using a GPS receiver. The fine frequency synchronization method includes: (a) performing despreading on received adjacent subcarrier sequences, using a PN sequence transmitted from a transmitting party; (b) obtaining ratios of correlative values obtained by the despreading; and (c) estimating a frequency offset on the basis of the ratio of correlative values. Accordingly, fine frequency offset estimation with relatively low complexity is possible without using a GPS receiver in a WiBro environment where interference signals of other base stations or repeaters exist. | 2009-02-12 |
20090041096 | EFFICIENT SYNCHRONIZATION OF A SPREAD SPECTRUM SIGNAL IN THE PRESENCE OF DELAY AND FREQUENCY UNCERTAINTY - Implementations for the synchronization of a spread spectrum signal in the presence of delay and frequency uncertainty. According to one embodiment, there is a signal processing technique that combines coherent integration with a Fast Fourier Transform (FFT). Coherent integration with the direct sequence code is achieved through the use of shift registers, code modulators, and integrators, and applied to subsequences of the spreading code. Subsequences can then be combined via an FFT to achieve further coherent integration and to simultaneously deal with frequency uncertainty. | 2009-02-12 |
20090041097 | APPARATUS AND METHOD FOR NETWORK-CODING - Provided are a network-coding apparatus and method which can increase a data communication capacity in a communication environment to which an error-correction code (ECC) is applied. The network-coding apparatus includes a received signal processing unit receiving at least two signals, and decoding the at least two received signals; and a transmission signal processing unit receiving the at least two decoded signals from the received signal processing unit, merging the at least two decoded signals, and generating a merged transmission signal. | 2009-02-12 |
20090041098 | CODING DEVICE, PULSE REGENERATING DEVICE, AND COMMUNICATIONS SYSTEM - It is an object of the present invention to provide coding techniques which allow for higher efficiency and easier synchronization with coded data. In order to attain the object, a coding device according to the present invention converts 2-bit informational data into 4-bit coded data according to a predetermined coding rule. According to the coding rule employed in the coding device, one of four possible kinds of bit strings of informational data is converted into alternately a bit string of four bits in which each of values of two successive bits is “1” and a bit string of four bits in which each of values of all bits is “0”. Then, the other kinds of bit strings are converted into bit strings of four bits which differ from one another, in each of which a value of only one bit is “1”. | 2009-02-12 |
20090041099 | LINK INTERFACE TECHNIQUE INCLUDING DATA INDICATOR SYMBOLS - In some embodiments, a chip includes transmitters and generation circuitry to provide data symbols and special characters to the transmitters to be transmitted. The chip also includes match detection circuitry to detect when the data symbols match the special characters; and indicator symbol generation circuitry to create data indicator symbols in response to detected matches and to provide the data indicator symbols to the generation circuitry to be provided to the transmitters to be transmitted. Other embodiments are described. | 2009-02-12 |
20090041100 | LINK AWARE MOBILE DATA NETWORK - Methods, systems, and devices are described for communicating data from multiple data terminals to an aggregator terminal over a communication link having changing link conditions. In some embodiments, source data is received at multiple data terminals, each in communication with an aggregator terminal over a communication link. For example, during a live newscast, one mobile camera may receive live video of an event from a first position while another mobile camera receives live video of the event from a second position. For various reasons (e.g., as the cameras move) each communication link may experience independently changing link conditions. Each data terminal encodes the source data (or store source data for later encoding) as a function of its respective link conditions, and transmits encoded source data over its respective communication link to the aggregator terminal. | 2009-02-12 |
20090041101 | TEST APPARATUS - A test apparatus includes a transmitting-side jitter measuring unit which measures a jitter of a transmission signal output from a transmitting circuit, a jitter applying unit which applies a jitter to the transmission signal and inputs the signal to a receiving circuit, a jitter range measuring unit which determines whether the logical value of the transmission signal detected by the receiving circuit is equal to a preset expectation value for each amplitude of the jitter applied to the transmission signal by the jitter applying unit, and measures the range of jitter amplitudes within which the logical value of the transmission signal is equal to the expectation value, and a jitter tolerance measuring unit which calculates jitter tolerance of the receiving circuit based on the jitter of the transmission signal measured by the transmitting-side jitter measuring unit and the range of jitter amplitudes measured by the jitter range measuring unit. | 2009-02-12 |
20090041102 | JITTER INJECTION CIRCUIT, ELECTRONICS DEVICE, AND TEST APPARATUS - Provided is a jitter injection circuit that injects jitter having a predetermined amplitude to a transmission signal outputted from a transmission circuit, and inputs the resulting transmission signal to a reception circuit, the jitter injection circuit including: a retiming section that receives the transmission signal from the transmission circuit, and performs retiming on an edge timing of the received transmission signal in accordance with a given clock signal; and a jitter injection section that injects the jitter having the predetermined amplitude to the transmission signal outputted from the retiming section, and inputs the resulting transmission signal to the reception circuit. | 2009-02-12 |
20090041103 | METHOD AND DEVICE FOR PERFORMING COMMUNICATION IN DIGITAL SUBSCRIBER LINE - A method and transmitter receiver sets are used to perform communication in digital subscriber line technology. The method includes: acquiring communication performance parameter; the first transmitter receiver set and the second transmitter receiver set using the predetermined communication standard to perform communication when the communication performance parameter is equal to the predetermined value or greater than the predetermined value, the predetermined communication standard is respectively set in the first transmitter receiver set and the second transmitter receiver set. The bit table and the gain table predetermined are respectively stored in the first transmitter receiver set and the second transmitter receiver set. According to the method, a rapid switch to the bit table and the gain table predetermined using simple message or enquiry answer mechanism may be ensured when great wideband noise exists. There is no need of interchanging the bit table and the gain table when using this method. | 2009-02-12 |
20090041104 | Phase and Frequency Recovery Techniques - Phase and frequency recovery techniques comprising; a software controlled clock synthesizer (SCCS) for high accuracy phase & frequency synthesis producing synchronized low jitter clock from external time referencing signals or time referencing messages wherein SCCS includes a hybrid PLL (HPLL) enabling 1-50,000 frequency multiplication with very low output jitter independent of reference clock quality, and receiver synchronization techniques (RST) enabling by one order more accurate synchronization of receiver clock to OFDM composite frame combined with much faster acquisition time and better stability of receivers oscillator. | 2009-02-12 |
20090041105 | COMMUNICATION CONTROL METHOD, RECEIVING STATION APPARATUS, TRANSMITTING STATION APPARATUS, AND COMMUNICATION SYSTEM - A receiving station apparatus controls a number of null carriers included in a transmission signal transmitted by a transmitting station apparatus in a communication system adopting a multicarrier modulation system to suppress inter-carrier interference by using the null carrier. For example, a reception-quality measuring unit measures a reception quality of a subcarrier group forming the transmission signal, and a number-of-null carriers determining unit determines the number of null carriers included in a next transmission signal based on the reception quality. | 2009-02-12 |
20090041106 | Variable equalizer apparatus - A variable equalizer apparatus for forward and/or reverse equalizers in an amplifier. The system can include a structure to allow continuous contact of the signal flow as an equalizer is removed; jumpers with fixed resistors and associated capacitors and inductors to produce a variable range over many different values; and/or variable resistance potentiometers with fixed resistors and associated capacitors and inductors to produce a variable range over separate value equalizers. | 2009-02-12 |
20090041107 | Finite-length equalization over multi-input multi-output channels - A MIMO Decision Feedback Equalizer improves operation of a receiver by canceling the spatio-temporal interference effects caused by the MIMO channel memory with a set of FIR filters in both the feed-forward and the feedback MIMO filters. The coefficients of these FIR filters can be fashioned to provide a variety of controls by the designer. | 2009-02-12 |
20090041108 | CASCADED PHASE PULSE POSITION AND PULSE WIDTH MODULATION BASED DIGITAL TRANSMITTER - Briefly, in accordance with one or more embodiments, a digital transmitter may comprise two or more phase modulators in a cascaded arrangement. The phase modulators may modulate a local oscillator signal using control signals derived from the quadrature baseband data to be transmitted. A closed loop power control feedback arrangement may be used to compare the output power of the transmitter with a desired output signal, and make corrections to the output signal by modifying at least one of the control signals provided to the cascaded phase modulators. | 2009-02-12 |
20090041109 | Compact floating point delta encoding for complex data - A method and apparatus for compression of complex data signals within a telecommunications base station. The method includes representing a sample of a complex value discrete time signal using 2(L−N)−S mantissa bits and 2N+S exponent bits to realize peak output signal to noise ratios over a wider dynamic range compared to a conventional L-bit uniform quantization format. The increases in dynamic range and peak output SNR is achieved without increasing the average number of data bits per sample and with relatively simple computational effort. | 2009-02-12 |
20090041110 | RATE MATCHING WITH MULTIPLE CODE BLOCK SIZES - Bits included in each code block of a transport block can be stored to an associated circular buffer and transmitted over a channel. Each circular buffer can vary in size in proportion to a size of the associated code block. Therefore, since in certain operating environments code blocks for a transport block can vary in size, circular buffers can vary in size as well. Accordingly, when not all data from a transport block and/or an array of circular buffers can be transmitted over the channel, each circular buffer from the array can transmit a portion of bits that is proportional to a size of the respective circular buffer (or the associated code block or encoded code block). Furthermore, the number of bits transmitted from each circular buffer can be constrained by an aggregate budget for all circular buffers and can be further constrained to be an integer multiple of a modulation order for the transport block. | 2009-02-12 |
20090041111 | SPECTRAL TRANSLATION/FOLDING IN THE SUBBAND DOMAIN - The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computational complexity. This is accomplished by means of frequency translation or folding in the subband domain, preferably integrated with spectral envelope adjustment in the same domain. The concept of dissonance guard-band filtering is further presented. The proposed invention offers a low-complexity, intermediate quality HFR method useful in speech and natural audio coding applications. | 2009-02-12 |
20090041112 | Method and apparatus of compressing image data - A method and an apparatus of compressing image data are provided. The method of compressing data comprises calculating differences between values of predetermined pixels from among pixels constructing an image and values of reference pixels respectively corresponding to the predetermined pixels; ordering bits, which correspond to bit strings of the differences, into bit planes; and coding the bit planes according to priority of the bit planes. | 2009-02-12 |
20090041113 | Method for Processing a Signal and Apparatus for Processing a Signal - A method and apparatus for processing a signal compressed in accordance with a specific alternative coding scheme are disclosed. In detail, a coding method for signal compression and signal restoration using a specific alternative coding scheme, and an apparatus therefor are disclosed. Data coding and entropy coding according to the present invention are executed under the condition in which they have a co-relation with each other. Grouping is executed for an enhancement in coding efficiency. The method for signal processing includes obtaining a group reference value corresponding to a plurality of data included in one group, through grouping, and a difference value corresponding to the group reference value, and obtaining the data using the group reference value and the difference value. | 2009-02-12 |
20090041114 | METHOD AND SYSTEM FOR VIEWER QUALITY ESTIMATION OF PACKET VIDEO STREAMS - A method and system for the estimation of the effect of packet loss on a viewer's subjective perception of a packet video stream. The method involves estimating a quality metric for every frame in the video stream, accumulating such metrics over time, and transforming the result into a Mean Opinion Score (“MOS”) which represents the viewer's subjective perception of the video stream. The method takes into account various factors such as frame rate, frame types and sizes, decoding algorithms, propagated error rates, and the effect of video content on viewer perception. The method can be used for both encrypted and unencrypted video streams. | 2009-02-12 |
20090041115 | TS Packet Grooming - Received data packets are groomed to improve performance of MPEG-2 transport stream packet in a digital video broadcasting system. Multitude of crosschecking techniques are applied to ensure that crucial pieces of information such as the packet identifier (PID) field, the continuity counter (CC) field, table ID, section length, IP header checksum, table and frame boundaries, application data table size are corrected if necessary. | 2009-02-12 |
20090041116 | DATA CONVERSION APPARATUS, RECORDING APPARATUS INCLUDING THE DATA CONVERSION APPARATUS, AND DATA CONVERSION METHOD - A data conversion apparatus which converts data including a K pixel amount of bit data expressed as N bits/1 pixel, where N and K are plural, using conversion data of predetermined bits comprising: a holding unit configured to hold input data in K×N bits; an acquisition unit configured to acquire from the conversion data a number of bit patterns corresponding to a decimal value expressed by N bits among a conversion target to convert the input data held by the holding unit by N-bit units; a storage unit configured to store a pattern of N bits corresponding to a decimal value obtained from a bit pattern acquired by the acquisition unit in a bit position of the conversion target; and an updating unit configured to update the bit position of the conversion target each time the acquisition unit and the storage unit perform processing. | 2009-02-12 |
20090041117 | Coding Scene Transitions in Video Coding - A method of generating a scene transition in a video sequence between a first and a second scene is provided. One of the scenes comprises independently decodable video frames coded according to a first frame format, and video frames coded according to a second frame format, one of the video frames according to the second frame format being predicted from one other video frame. The presentation time of one video frame of the first scene is determined to be equal to that of one scene transition video frame of the second scene during the scene transition. Scene transition information is determined for one video frame of one scene for generating a scene transition with a decoder. One scene transition video frame of the first scene, one scene transition video frame of the second scene, and the scene transition information are coded in the encoder into the video sequence. | 2009-02-12 |
20090041118 | Method for Bandwidth Regulation on a Cable Television System Channel - A method for regulating bandwidth usage in an output data stream transmitted on an analog channel from a cable head end. The output data stream comprises a plurality of input information content signals. For each input information content signal, a series of images are captured, compressed and formed into an input digital data stream. The bandwidth of each input digital data stream is regulated by associating the stream with a current bit allocation total. During each frame time: a bit allocation increment is added to the current bit allocation total for each input digital data stream. When a data packet to be transmitted for an input digital data stream is received by the multiplexer, the data packet is stored. When the number of bits in the stored data packet is not more than the current bit allocation total for the input digital data stream, the multiplexer forwards the stored data packet for transmission in the output data stream on the analog channel and decrements the current bit allocation total for the given input digital data stream by the number of bits in the stored data packet. In this way, no individual input channel takes more than its share of the bandwidth on the output stream on the analog channel. | 2009-02-12 |
20090041119 | Method and Device for Coding a Video Image - The method comprises a coding of a source block according to a coding mode wherein the selection of the coding mode is carried out, for a source block, according to coding error estimations and source block coding cost estimations for the different coding modes tested, the coding error being estimated, for a coding mode, according to the sum of the absolute values of coefficients obtained after a mathematical transformation in the frequency domain of the residue block related to this coding mode and as a function of the sum of absolute values of quantized coefficients corresponding to this coding mode. An application is the decision of the coding mode for data using the MPEG 2 or MPEG4-AVC standard. | 2009-02-12 |
20090041120 | Luma and Chroma Encoding Using a Common Predictor - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data. | 2009-02-12 |
20090041121 | Method and apparatus for encoding video data, and method and apparatus for decoding video data - Scalable video coding based on H.264/AVC uses motion compensation, which results in motion vectors and residual pictures. To optimize the encoding of the residual pictures of the enhancement-layer, they can be predicted from the base-layer. This requires complex encoders and decoders. Simplified residual prediction techniques are provided that focus on reducing the encoding and decoding complexity of the spatial scalable enhancement-layer with optimized coding efficiency. The method for encoding video data containing high-pass frames and low-pass frames comprises the steps of encoding the low-pass frames, wherein residual prediction may be used, splitting the high-pass frames into two interleaving frame groups, encoding the frames of the first of said frame groups, wherein residual prediction may be used, and encoding the frames of the second of the frame groups using an encoding method without residual prediction. | 2009-02-12 |
20090041122 | IMAGE CODING APPARATUS, IMAGE CODING METHOD AND IMAGE CODING PROGRAM - The image coding apparatus is provided to realize image coding with little calculation quantity and through rate distortion optimization thereby maintaining a favorable image quality. The image coding apparatus includes a processing unit that conducts frequency transform and quantization on a block in a predetermined manner for a plurality of coding modes, each mode having a different coding process, a cost calculating unit that calculates a predictive coded quantity and coding distortion in a coding mode using a result of the quantization conducted by the processing unit and a residue to obtain a cost regarding the coding mode, a minimum coding cost selecting unit that selects a minimum coding cost among the coding costs calculated for respective coding modes, and a coding unit that conducts coding on the blocks in a coding mode associated with the minimum coding cost selected by the minimum coding cost selecting unit. | 2009-02-12 |
20090041123 | GENERALIZED SCALABILITY FOR VIDEO CODER BASED ON VIDEO OBJECTS - A video coding system that codes video objects as scalable video object layers. Data of each video object may be segregated into one or more layers. A base layer contains sufficient information to decode a basic representation of the video object. Enhancement layers contain supplementary data regarding the video object that, if decoded, enhance the basic representation obtained from the base layer. The present invention thus provides a coding scheme suitable for use with decoders of varying processing power. A simple decoder may decode only the base layer of video objects to obtain the basic representation. However, more powerful decoders may decode the base layer data of video objects and additional enhancement layer data to obtain improved decoded output. The coding scheme supports enhancement of both the spatial resolution and the temporal resolution of video objects. | 2009-02-12 |
20090041124 | IMAGE CODING APPARATUS AND METHOD - The image coding apparatus comprises: a decoding unit | 2009-02-12 |
20090041125 | MOVING PICTURE CODING APPARATUS AND METHOD - A motion vector estimating device estimating a motion vector having high accuracy is provided. An eliminating unit eliminates each of pictures in a set of input pictures for each picture. A picture reducing unit reduces left pictures after the elimination, and generates reduced pictures. An overall motion vector estimating unit reads the reduced pictures, stored in the frame memory, as either reduced inputted pictures or reduced reference pictures, and estimates an overall motion vector between reduced pictures. Based on the overall motion vector estimated between the reduced pictures, a correction motion vector calculating unit calculates a motion vector between two reduced pictures as a correction motion vector. The correction motion vector calculating unit calculates the motion vector in the order of the inputted pictures in a pre-eliminated set of input pictures. A coding unit estimates the motion vector for each macroblock, using a determined search range, and performs cording processing. | 2009-02-12 |
20090041126 | Electronic apparatus, motion vector detecting method, and program therefor - An electronic apparatus includes an extracting unit, a retrieving unit, a detecting unit, and a controlling unit. The extracting unit extracts a first block at a first position of a first frame image from plural frame images constituting video data. The retrieving unit retrieves, from a retrieval region within a second frame image from among the plural frame images, a second block between which the first block has a smallest residual value, the second and first frame images having a first time length therebetween. The detecting unit detects a first motion vector between the first and second blocks. The controlling unit controls the detecting unit so that detection of the first motion vector is regulated when the second block is retrieved at a third position apart from the second position of the second frame image corresponding to the first position by a first threshold or more. | 2009-02-12 |
20090041127 | FLEXIBLE LENGTH DECODER - A flexible length decoder including a plurality of data filter units and a control unit is provided. The data filter units perform a comparing operation on a data stream according its corresponding pattern and output a comparing result. The control unit controls the configurations of the data filter units. If the space of any one of the data filter units for storing the pattern is not enough to record the required pattern, the control unit combines two or more data filter units into an equivalent data filter unit, such that the equivalent data filter unit stores the pattern and performs the comparing operation. | 2009-02-12 |
20090041128 | SYSTEM AND METHOD FOR USING PATTERN VECTORS FOR VIDEO AND IMAGE CODING AND DECODING - An exemplary embodiment of the invention relates to a method of using pattern vectors for image coding and decoding. The method comprises converting a block of image data into a set of transform coefficients, quantizing the transform coefficients such that a number of the coefficients become zero, constructing a single entity or bit vector indicating which coefficients are non-zero, coding the single entity or bit vector as an integer using an adaptive, semi-adaptive or non-adaptive arithmetic coder, coding the values of the coefficients in any fixed order, using an adaptive, semi-adaptive or non-adaptive arithmetic coder, or some other coder, and coding all coefficients except the zero coefficients. The system and method of decoding data relate to the corresponding hardware and process steps performed by the decoder when decoding a bitstream coded as described herein. | 2009-02-12 |
20090041129 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD - A digital broadcasting system and a method of processing data are disclosed, which are robust to error when mobile service data are transmitted. To this end, additional encoding is performed for the mobile service data, whereby it is possible to strongly cope with fast channel change while giving robustness to the mobile service data. | 2009-02-12 |
20090041130 | METHOD OF TRANSMITTING PICTURE INFORMATION WHEN ENCODING VIDEO SIGNAL AND METHOD OF USING THE SAME WHEN DECODING VIDEO SIGNAL - A method of transmitting picture information of a video signal from an encoder and a method of using the picture information in a decoder are provided. When a video signal is encoded, the video signal is coded according to a specified scheme while being divided into key and non-key pictures, and a value indicating whether or not coded picture data carried in each NAL unit is key picture data is recorded in a ‘nal_ref_idc’ field in a header of the NAL unit or, alternatively, a value (adaptive_ref_pic_marking_mode_flag=1) indicating that a Memory Management Control Operation (MMCO) is present and a control operation value indicating a key picture are recorded in a header of a picture coded into a key picture. | 2009-02-12 |
20090041131 | METHOD FOR PROTECTION OF DATA REPRODUCTION ACCORDING TO BOTH MEDIUM PROTECTION DATA AND APPARATUS PROTECTION DATA, INCLUDING LIMITATION OF REPRODUCTION BASED ON A FILM CLASSIFICATION SYSTEM - In a reproduction apparatus, for reproducing an original signal conveyed as main data by a data medium such as a recording disk or broadcasting system, with medium protection data which are specific to the data medium being conveyed together with the main data, the apparatus includes a section for generating apparatus protection data which are specific to the reproduction apparatus, a section for combining the apparatus protection data with the medium protection data to define a protection level, and a section for applying the protection level to restrict reproduction of the original signal, with stepwise variations in restriction occurring in accordance with changes in protection level. The medium protection data may include information for specifying restricted reproduction of portions of the original signal, such as by producing degraded resolution within specified regions of specified frames of a video signal. | 2009-02-12 |
20090041132 | METHOD AND DEVICE FOR ADAPTING A TEMPORAL FREQUENCY OF A SEQUENCE OF VIDEO IMAGES - The invention concerns a method of adapting a temporal frequency of a sequence of video images for the purpose of its transmission over a communication network, characterized in that images of the sequence having been sampled at a temporal frequency f | 2009-02-12 |
20090041133 | COMMUNICATION PROTOCOL METHODS - Communication protocol methods for performing signal synchronization, data transmission, and data acknowledgement between a transmitting device and a receiving device are provided. The methods are characterized by a plurality of transmission lines which are used for performing signal synchronization, data transmission, and data acknowledgement by the communication protocol methods. | 2009-02-12 |
20090041134 | Methods and Apparatus for Channel Estimation for Wideband Ofdm Communication Systems - Systems and methods according to the present invention provide channel estimation methods, systems and devices which determine a coarse channel estimate ( | 2009-02-12 |
20090041135 | NULL DETECTION IN DAB, T-DMB, AND DAB-IP SYSTEMS - Detecting Null symbols in a video data frame comprises sending OFDM symbols through a sliding windowed correlation process having a correlation window length proportional to a cyclic prefix length and a delay equal to a FFT size of the symbols, wherein output peaks of the process occur where two similar portions of the symbols coincide; checking peaks in windows sized equal to a duration of a symbol; determining whether the peaks are located in the middle of the windows; determining whether a shift has occurred in the location of the peak of a current window compared to in a second immediately previous window; determining whether the peak in a first immediately previous window is weak compared to that in a second immediately previous window; and declaring that a Null symbol exists in the first previous window when the shift has occurred and the determination of a weak peak exists. | 2009-02-12 |
20090041136 | METHOD AND APPARATUS FOR RECOGNITION OF TRANSMISSION PARAMETER SIGNALING (TPS) AT FREQUENCY DOMAIN IN A TDS-OFDM RECEIVER - A receiver comprises a method is provided. The method has the step of: determining a transmission parameter signaling (TPS) parameter based a group of vectors inherent to a communication system. | 2009-02-12 |
20090041137 | INDIVIDUAL INTERLEAVING OF DATA STREAMS FOR MIMO TRANSMISSION - The present invention, generally speaking, provides interleavers and methods of interleaving that satisfy the need for backward compatibility while effectively addressing competing design objectives. In accordance with one aspect of the invention, data is transmitted using a number of transmit antennas greater than an expected number of receive antennas. At least one pair of transmit antennas (ant′_1, ant′_) is formed, and multiple second data streams ( | 2009-02-12 |
20090041138 | EFFICIENT CQICH TRANSPORT FORMAT - An efficient channel quality indicator channel (CQICH) transport method and system are disclosed. The CQICH transport method defines five types of CQI transport formats, to cover known cases of CQI feedback. The CQICH transport method further defines the format of transportation, which enables any of the five types of CQI transport formats to be transmitted. | 2009-02-12 |
20090041139 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING UPLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting/receiving pilot symbols for demodulation of control channel information in the uplink of a wireless communication system are provided. When an Evolved Node B (ENB) expects to receive both the Channel Quality Information (CQI) and the Acknowledgement (ACK)/Negative ACK (NACK) from a User Equipment (UE) in a certain subframe, if the UE transmits only the CQI channel, the ENB is prevented to detect the nonexistent ACK/NACK information from the CQI channel, thereby avoiding false alarm. | 2009-02-12 |
20090041140 | METHOD FOR BLINDLY DETECTING A PRECODING MATRIX INDEX - A method for blindly detecting a precoding matrix index used to transmit a data or control signal is provided. The method includes receiving at a mobile station ( | 2009-02-12 |
20090041141 | PILOT PATTERN DESIGN FOR AN OFDM SYSTEM - The present invention relates to a transmitting device and a receiving device in a wireless orthogonal frequency division multiplex (OFDM) communication system with space time transmit diversity (STTD). Further, the present invention relates to a channel estimation method for performing a channel estimation in such a wireless communication system, in which the transmitting device comprises a first and a second antenna for transmitting signals with space time transmit diversity. The first and the second antenna means are arranged spaced apart from each other in a space diversity arrangement, whereby first and second pilot symbols are transmitted via said first and said second antenna means, respectively. Some of the second pilot symbols are orthogonal to corresponding ones of the first pilot symbols, so that a channel estimation to separately determine the transmission quality of signals transmitted from the first and the second antenna means, respectively, can be performed in a receiving device which receives the signals with only one single antenna. | 2009-02-12 |
20090041142 | PILOT PATTERN DESIGN FOR AN OFDM SYSTEM - A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension. | 2009-02-12 |
20090041143 | MULTI-CARRIER TRANSMISSION SYSTEM - Multi-carrier transmission system comprises transmitter including acquisition unit configured to acquire 2 | 2009-02-12 |
20090041144 | MULTI-USER MIMO RECEIVER AND METHOD FOR DECODING SIMULTANEOUS UPLINK TRANSMISSIONS FROM MOBILE STATIONS - Multicarrier receivers and methods for carrier frequency offset correction and channel estimation for receipt of simultaneous transmissions over a multi-user uplink are generally described herein. Other embodiments may be described and claimed. | 2009-02-12 |
20090041145 | METHOD TO DETECT DATA TRANSMITTED FROM MULTIPLE ANTENNAS AND SYSTEM THEREOF - A method to detect data transmitted from multiple antennas, said method comprising steps of: selecting a starting data block and calling it as previous data block; defining a set of indices of bits to be checked for possible flip in the previous data block as a check candidate set; applying update rule to obtain updated data block using the previous data block and the check candidate set, wherein the update is made in such a manner that change in likelihood is positive; checking if the updated data block and several consecutive previous data blocks are the same; if yes, declare the updated data block as the detected data block; if no, make updated data block as previous data block and repeat updation of data block. | 2009-02-12 |
20090041146 | TRANSPORT STREAM GENERATING DEVICE, TRANSMITTING DEVICE, RECEIVING DEVICE, AND A DIGITAL BROADCAST SYSTEM HAVING THE SAME, AND METHOD THEREOF - A transport stream (TS) generating apparatus, a transmitting apparatus, a receiving apparatus, a digital broadcast system having the above, and a method thereof are provided. The digital broadcast system includes a transport stream (TS) generating apparatus which generates a multi transport stream (TS) by multiplexing a normal stream and a turbo stream having a variable coding rate, a transmitting apparatus which re-constructs the multi TS by processing the turbo stream, and transmits the re-constructed multi TS, and a receiving apparatus which receives the re-constructed multi TS, and decodes the normal stream and the turbo stream respectively, to recover normal data and turbo data. Accordingly, a multi TS, which includes normal stream and a turbo stream of various coding rates, can be transmitted and received efficiently. | 2009-02-12 |