51st week of 2008 patent applcation highlights part 30 |
Patent application number | Title | Published |
20080310454 | Provisioning Bandwidth For A Digital Media Stream - Provisioning bandwidth for a digital media stream, the digital media stream characterized by a bandwidth, including receiving, by a media server from a media display device, information describing a user's anticipated viewing requirements; selecting, by the media server in dependence upon the information describing the user's anticipated viewing requirements, a first channel and at least one second channel; and before receiving, by the media server from the media display device, a user selection of either channel: adapting a first portion of the bandwidth for transmission of the content of a first channel and a second, smaller portion of the bandwidth for transmission of the content of the second channel; and transmitting, multiplexed together in the digital media stream, the content of the first channel and the content of the second channel, the content of the second channel transmitted with a lower quality than the content of the first channel. | 2008-12-18 |
20080310455 | Multi-Code-Set Channel Estimation Method in a Time-Slot Cdma System - A multi-code-set channel estimation method in a time-slot CDMA system having steps of: A. performing uni-code-set channel estimations and obtaining channel estimation result; B. extracting a maximum interference tap from the channel estimation result; C. reproducing interference components suffered respectively by response signals corresponding respectively to the plurality of code-sets from the maximum interference tap; D. canceling the interference components, and obtaining a pure channel estimation result of a signal corresponding to each code-set; E. determining whether a predetermined number of iterations has been performed, if so, outputting the result of each uni-code-set channel estimation; otherwise, taking the pure channel estimation result of the signal corresponding to each code-set as the channel estimation result of the code-set to be processed in the next iteration, and returning to step B. Due to the present invention, a multi-code-set joint channel estimation with high performance can be implemented simply and effectively. | 2008-12-18 |
20080310456 | Communication System over a Power Line Distribution Network - The present disclosure provides a system for receiving signals over a power line distribution. Typically, problems of noise and interference are being solved at the receiver side. Systems of the present disclosure, however, are not limited to the receiver-side solution. Systems according to the present disclosure may also be used at the transmitter side. The receiver comprises a high pass filter, a preselect crossover filter, and an analog front-end receiver architecture. | 2008-12-18 |
20080310457 | Data Communication System, Data Transmitting Device, Data Receiving Device, Data Communication Method, and Data Communication Program - There is provided a data communication system that performs power line communication having satisfactory communication quality by disposing data in channels where notches or noises do not exist in a distributed manner. There is included a step S | 2008-12-18 |
20080310458 | Electronic Device and Method of Communication Resource Allocation - An electronic device is provided which comprises an interconnect means (N) for coupling a plurality of processing modules (IP | 2008-12-18 |
20080310459 | Telecommunications control device autonomously determining transmission timing and a method therefor - A network node constituting a telecommunications system together with one or more neighboring nodes includes a telecommunications control device, which includes a timing control signal receiver for receiving timing control signals transmitted from the neighboring nodes, and a transmission timing calculator for determining data transmission timing of the network node, based on reception timing of the timing controls signal of the neighboring nodes. The device further includes a timing control signal transmitter for transmitting a timing control signal with a phase indicative of data transmission timing of the network node reflected, a data communicator for transmitting and receiving a data signal to and from the neighboring nodes, and a phase state manager for controlling transmission of the timing control signal and data signal in accordance with the phase state of the network node. | 2008-12-18 |
20080310460 | Deterministic Program Clock Reference Re-stamping for Synchronous Bit Rate Adaptation based on Mega-frame Initialization Packet - A system and processes create a transport stream carrying several encapsulated contents, watermarks, and other ancillary data. The transport stream is re-multiplexed while keeping synchronous and deterministic operation. Synchronous deterministic operation allow each derived transport stream to be broadcasted in Single Frequency Networks, as all re-multiplexers have the same signal at the input and selecting the same content generates exactly the same stream in multiple locations. | 2008-12-18 |
20080310461 | SYSTEM AND METHOD FOR TRANSMITTING AND DISTRIBUTING AUDIO OR VIDEO DATA OVER A NETWORK SYSTEM HAVING MULTIPLE RECEIVERS - A system for transmitting and distributing audio or video information. The system includes a multi-channel input module and multiple receivers arranged along at least one chain of high speed serial data links where each receiver can tap into a common set of digital channels generated by a transmitter. Each receiver can create its own user adjustable mix based on one or more signals from the common set of digital channels. | 2008-12-18 |
20080310462 | Anamorphotic solid-sate laser - A laser system, which is used in material processing to produce a radiation line of small width and uniform high intensity in the longitudinal direction, produces radiation that has different mode numbers M | 2008-12-18 |
20080310463 | Tunable Lasers Locked to Whispering Gallery Mode Resonators - Techniques and devices that stabilize a laser to a whispering gallery mode optical resonator. | 2008-12-18 |
20080310464 | Device for Generating and Modulating a High-Frequency Signal - A device and method involving a plurality of lasers for generating and modulating a tunable, high-frequency signal for a wireless communication system, including an optical waveguide, may be produced using standard components of optical communication technology. A signal source may be provided which generates an optical signal and is disposed on one side of the optical waveguide. At least one means is provided for generating harmonic waves of this signal, which propagate as frequency mix in the optical waveguide. Two pump lasers are provided for the injection of pump waves on an opposite side of the optical waveguide, which are adapted so that together they amplify two harmonic waves of the frequency mix by stimulated Brillouin scattering. The rest of the harmonic waves are attenuated by damping in the optical waveguide. The two amplified harmonic waves are superposed in a photo element in heterodyne fashion and generate the RF signal. | 2008-12-18 |
20080310465 | Method and Laser Device for Stabilized Frequency Doubling - A system and method for emitting a plurality of second harmonic light frequencies that is generally unaffected by small variations in external cavity length and temperature. An illustrative embodiment provides a laser system that comprises a semiconductor gain region operating within the coherence collapse regime, an intra-cavity nonlinear optical medium, and a feedback reflector. The semiconductor gain region operates in the coherence collapse regime and produces broad frequency fundamental light, the nonlinear resonator doubles a first portion of the broad frequency fundamental light and emits a plurality of second harmonic light frequencies external to the laser system. A second portion of the broad frequency fundamental light is reflected into the semiconductor gain region with a feedback power ratio sufficient to cause the semiconductor gain region to operate in the coherence collapse regime. | 2008-12-18 |
20080310466 | Apparatus and Method of Generating Laser Beam - A laser beam generating apparatus includes a semiconductor element and a second harmonic generating element that performs a wavelength conversion on fundamental light emitted from the semiconductor element, the laser beam generating apparatus is an external resonance-type laser diode that has an external resonator structure and emits a transversal single mode laser beam, and the second harmonic generating element is a waveguide-type second harmonic generating element that includes a single mode waveguide. | 2008-12-18 |
20080310467 | Semiconductor light emitting devices and methods - A method for producing an optical output, including the following steps: providing first and second electrical signals; providing a bipolar light-emitting transistor device that includes collector, base, and emitter regions; providing a collector electrode coupled with the collector region and an emitter electrode coupled with the emitter region, and coupling electrical potentials with respect to the collector and emitter electrodes; providing an optical coupling in optical communication with the base region; providing first and second base electrodes coupled with the base region; and coupling the first and second electrical signals with the first and second base electrodes, respectively, to produce an optical output emitted from the base region and coupled into the optical coupling, the optical output being a function of the first and second electrical signals. | 2008-12-18 |
20080310468 | Laser Diode control method, laser Diode control device, and camcorder - A laser diode is controlled such that a writing operation can be performed readily even at a low temperature and equal to or below the operation guarantee temperature range of the laser diode. A laser diode control device includes a temperature sensor for detecting temperature of a laser diode. If a detected temperature by the temperature sensor is equal to or below the operation guarantee temperature range, a current equivalent to a threshold current value is supplied to the laser diode. After a predetermined time lapses, laser light is outputted to increase temperature of the laser diode to the operation guarantee temperature thereof. Finally, a writing operation is then carried out. | 2008-12-18 |
20080310469 | Laser Device Formed By a Stack of Laser Diodes - The laser device ( | 2008-12-18 |
20080310470 | Broadband semiconductor laser - A broadband laser having a first cladding layer, a second cladding layer. A semiconductor structure between the first and second cladding layers has a layer of inhomogeneous quantum nano heterostructures. The inhomogeneous quantum nano heterostructures are engineered to lase at a ground state and at an excited state. | 2008-12-18 |
20080310471 | SEMICONDUCTOR LASER DEVICE AND METHOD OF MANUFACTURING THE SAME - A semiconductor laser device includes a first semiconductor laser element formed on a surface of a first conductive type substrate, obtained by stacking a first conductive type first semiconductor layer, a first active layer and a second conductive type second semiconductor layer successively from the first conductive type substrate and a second semiconductor laser element obtained by successively stacking a first conductive type third semiconductor layer, a second active layer and a second conductive type fourth semiconductor layer, wherein the third semiconductor layer is electrically connected to the first semiconductor layer by bonding a side of the third semiconductor layer to the surface of the first conductive type substrate through a fusible layer. | 2008-12-18 |
20080310472 | LASER DIODE CHIP AND ITS PRODUCTION METHOD - A laser diode chip that yields high irradiance and radiant efficiency, and that emits light having a broad wavelength width and can be used as an element in a light source for an illumination device, and its production method. The laser diode chip has at least a first clad layer, an active layer, and a second clad layer stacked in that order on a substrate, is constructed of a specified combination of constituent materials for the first clad layer, active layer, and second clad layer, and has multiple, parallel, slot-shaped concavities formed in the upper surface of the second clad layer, in each of which a liquid oxide film is baked to form a current arctation layer. Light emitting points are formed in the active layer in each of the light emitting unit areas demarcated by the current arctation layers, the maximum depth of which is 5.0 μm or less. | 2008-12-18 |
20080310473 | SEMICONDUCTOR LASER - A semiconductor laser is provided which emits laser light in which the intensity center of the far-field pattern in the horizontal direction does not vary with variation of the optical output and in which the shape of the far-field pattern in the horizontal direction is stable. The width of trenches is determined so that the magnitude (E | 2008-12-18 |
20080310474 | SQUARE MICRO-CAVITY LASER WITH AN OUTPUT WAVEGUIDE - A square micro-cavity laser with an output waveguide comprises: a substrate; a resonator, which has a square shape and is fabricated on the substrate; a stripe output waveguide, which is fabricated on the substrate and is connected to the midpoint of one side face of the resonator; wherein the area of the resonator or the stripe output waveguide is less than that of the substrate. | 2008-12-18 |
20080310475 | Laser device having thermal lens astigmatism compensation devices and methods of use - The present application is directed to various embodiments of laser devices having at least one thermal lens astigmatism compensation device and methods of use and includes at least one pump source configured to irradiate at least one pump signal, a first gain device is communication with the pump source and configured to irradiate at least one first output signal in response to the pump signal, the first output signal having a first intensity profile Ip | 2008-12-18 |
20080310476 | Thermographic Method and Device for Determining the Damaged State of a Part - Disclosed is a method for determining the degree to which parts, especially parts that are exposed to loads ( | 2008-12-18 |
20080310477 | Filled hotwire elements and sensors for thermal conductivity detectors - Hotwire elements for thermal conductivity detectors, consisting of one or two individual nickel filaments with more than 200 ohm resistance at 20° C. and finer than 5 micrometers coating of polytetrafluoroethylene, wound with homogeneously distributed interspaces into a filled up to at most ⅔ of its volume gas-permeable spherical or cylindrical body. Relevant hotwire sensors for thermal conductivity detectors, each comprising a wound on a holder filled element enveloped by fixed fillers forming a symmetric to it built-in cavity with a gas inlet and an outlet surrounding the element holder. Radii of the filled elements and their cavities are in proportion, at which minimum electric current is needed for heating the elements to desired temperature. | 2008-12-18 |
20080310478 | Method and Apparatus for Synchronized Pressure and Temperature Determination in a High-Pressure Container by Means of Ultrasonic Transit Time Measurement - Pressure and temperature inside a high-pressure container (common rail) are measured by means an ultrasonic emitter or an ultrasonic receiver which can detect the pressure inside the high-pressure container in a medium on the basis of the transit time of a pressure pulse. To this end, the ultrasonic receiver receives the pressure pulse, which propagates inside an additional element that is disposed between the ultrasonic emitter or ultrasonic receiver and the medium, and this propagation is ascertained accordingly in order to calculate a temperature from it. | 2008-12-18 |
20080310479 | Signal transmission method with frequency and time spreading - A transmission system using frequency and time spreading techniques is disclosed. The transmission system allows priority of transmission parameters and adjustment of same in relation to transmission quality and channel characteristics measured in real time. | 2008-12-18 |
20080310480 | Reception of Wideband Signals with High Temperature Superconducting Components to Reduce Co-Site Interference - A comb limiter combiner for front end filtering reduces bit error rates with an increased reception range. Notch filters are tuned to suppress interfering frequency-hopped signals. An output comb filter suppresses out-of-band intermodulation products generated by any non-linear devices (such as limiters and the notch filters) in each of the comb limiter combiner sub-bands. Sensitivity is further increased by the use of cryogenically cooled high temperature superconductor components for the filters, amplifiers, and limiters used in each sub-band. | 2008-12-18 |
20080310481 | System and method for transmitting and detecting spread spectrum signals - This document discusses, among other things, a system and method of detecting wideband signals of bandwidth X within a communications system having a coherency time constant of T. A synchronization signal is generated as a function of a chirp signal that sweeps a portion of bandwidth X. The synchronization signal is transmitted and a received as a wideband signal at a receiver. The receiver detects the synchronization signal within the wideband signal received at the receiver by generating a detection signal, correlating the received wideband signal with the detection signal and indicating when the synchronization signal is detected within the wideband signal. The detection signal is a complex conjugate of the synchronization signal. | 2008-12-18 |
20080310482 | Alternative direct sequence spread spectrum symbol to chip mappings and methods for generating the same - Alternative direct sequence spread spectrum symbol to chip mappings and methods for generating the same for use in a direct sequence spread spectrum wireless protocol and embedded in a transceiver chip used by wireless subsystems are provided. The present invention discloses alternative symbol to chip mappings that are orthogonal or nearly orthogonal to the N/2 unused chip sequences defined by a standard transmission protocol. The present invention is advantageous because it provides for an increased number of users and better reliability for wireless subsystems operating in increasingly overcrowded frequency bands. Other advantages of the present invention include a reduction in the negative effects of clear channel assessment including delayed or cancelled signal transmission and interference for wireless subsystems that transmit time-sensitive data. | 2008-12-18 |
20080310483 | TRANSMITTING SPREAD SIGNAL IN MOBILE COMMUNICATION SYSTEM - The present invention provides for spreading a first signal using a plurality of spreading codes, multiplexing the first spread signal by code division multiplexing, transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a first antenna set, spreading a second signal using a plurality of spreading codes, multiplexing the second spread signal by code division multiplexing, transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the first antenna set, transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a second antenna set, and transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the second antenna set, wherein the first multiplexed signal is transmitted on frequency resources that neighbor frequency resources that the second multiplexed signal is transmitted on. | 2008-12-18 |
20080310484 | Software Adaptable High Performance Multicarrier Transmission Protocol - Techniques for reducing peak-to-average power in multicarrier transmitters employ peak cancellation with subcarriers that are impaired by existing channel conditions. The use of Carrier Interferometry (CI) coding further improves the effectiveness of peak reduction. CI coding can also be impressed onto pulse sequences in the time domain, which enhances spectral selection and facilitates peak-power control. | 2008-12-18 |
20080310485 | SYSTEM AND METHODS FOR CONTROLLING MODEM HARDWARE - Systems and methods are provided for minimizing power consumption in a wireless mobile device. In one embodiment, a computer implemented method is provided that facilitates utilization of resources of a mobile device. This includes identifying available resources of a device and dynamically disabling or enabling subsets of the resources as a function of at least a channel estimation to improve or optimize performance of the device. | 2008-12-18 |
20080310486 | PRAGMATIC ADAPTIVE MRC AND MMSE MIMO-OFDM RECEIVER ALGORITHM - An adaptive receiver algorithm is disclosed, for use in MIMO-OFDM systems. The adaptive receiver algorithm selectively chooses either the MRC technique or the MMSE technique, for optimum receiver performance, depending on the characteristics of the wireless environment. | 2008-12-18 |
20080310487 | Single-chip wireless tranceiver - Embodiments of a wireless transceiver are provided. Embodiments can be used in multiple-input-multiple-output (MIMO) wireless transceivers. In an embodiment, radio control signal bundles are provided as direct parallel interconnects between digital signal processing modules and the radio module of the wireless transceiver to enable a precise low-latency control of radio functions. In another embodiment, a separate physical line is provided to control each radio setting of the radio module, thereby enabling simultaneous real-time control of any number of radio settings. In a further embodiment, the various digital and analog components of the wireless transceiver are integrated within a single chip of the same process technology. | 2008-12-18 |
20080310488 | Adaptive Transmission Rate and Fragmentation Threshold Mechanism for Local Area Networks - An apparatus for adjusting the transmission bit rate and fragmentation threshold of a wireless station in response to transmission errors is disclosed. In particular, the illustrative embodiment of the present invention is based on a wireless station that employs both an IEEE 802.11 radio and a Bluetooth radio, and determines whether transmission errors of the IEEE 802.11 radio are due to fading, or interference from the Bluetooth radio. It will be clear to those skilled in the art how to make and use alternative embodiments of the present invention for protocols other than IEEE 802.11 and Bluetooth, as well as stations that employ wireline or non-RF-wireless transceivers. | 2008-12-18 |
20080310489 | COMMUNICATION SYSTEM, RECEIVER UNIT, AND ADAPTIVE EQUALIZER - A communication system in which a signal is transferred includes a transmitter that transmits a signal, a receiver that receives a signal transmitted thereto, and an adaptive equalizer that generates a compensated signal by compensating degradation of the signal to be received by the receiver. The adaptive equalizer includes a signal compensating section that generates the compensated signal by passing therethrough the signal to be received by the receiver, a jitter measuring section that measures jitter of the compensated signal output from the signal compensating section, and an adjusting section that adjusts a characteristic of the signal compensating section so as to reduce the jitter of the compensated signal which is measured by the jitter measuring section. | 2008-12-18 |
20080310490 | Signal Generator and User Interface for Adding Amplitude Noise to Selected Portions of a Test Signal - A signal generator generates amplitude noise on a selected segment of a test signal. A user interface is used for selecting a segment of the test signal and an associated power level for applying amplitude noise at a selected power level to the test signal segment. A signal processing unit compiles the selected power level of the selected segment with the test signal to generate digital data representative of the test signal with selected segments having amplitude noise. A waveform generator receives the digital data and generating a test signal output having amplitude noise at selected segments of the test signal. The method includes the steps of: selecting a segment of the test signal to add amplitude noise; selecting a power level for the amplitude noise; and applying the amplitude noise at the selected power level to the selected segment of the test signal. | 2008-12-18 |
20080310491 | MULTI-MODE TRANSMITTER - A multi-mode transmitter within an integrated circuit device. The multi-mode transmitter transmits a first data sequence in a baseband signal when a first transmission mode is enabled, and transmits the first data sequence in a multi-band signal when a second transmission mode is enabled. | 2008-12-18 |
20080310492 | Parameter Adjustment Device and Parameter Adjustment Method - Transmission equipment that can be used up to a high frequency and simplifies a circuit design includes a THP preceding means on a transmitting side, and an equalizer means, wherein analog processing is carried out on a receiving side. Compensation of the frequency characteristic of a transmission channel is divided into the THP preceding means on the transmitting side and the equalizer means, so that due to compensation by the equalizer circuit, the absolute value of a THP coefficient becomes small, and a DAC with lower resolution, wherein stability of a loop of the THP increases, can be used. Detailed adjustment for adapting to the characteristic of a transmission channel is carried out by the THP, so that the equalizer circuit is only required to roughly compensate, and is not required to adjust. As a result, the equalizer circuit can be of a simple design. | 2008-12-18 |
20080310493 | Fast training equalization of a signal by using adaptive-iterative algorithm with main path phase correction - A signal receiver inputs a signal, computes a set of equalizer tap values during a signal acquisition phase by applying an algorithm iteratively to a given set of training data contained within the signal, and uses the set of equalizer tap values to perform signal equalization during the signal acquisition phase. The algorithm includes computing and applying phase correction to the pre-equalized signal at each adaptation step to correct for phase error related to the main path only, of the input signal. | 2008-12-18 |
20080310494 | Leakage Scheme for Receiver - A receiver for processing a transmission signal distorted by a transmission channel is described. The receiver has an adaptive signal processor ( | 2008-12-18 |
20080310495 | DECISION FEEDBACK EQUALIZER USING SOFT DECISIONS - A decision feedback equalizer (DFE) and method include at least two paths. Each path includes the following. An adder is configured to sum an input with a first feedback tap fed back from a different path. A latch is coupled to the adder to receive a summation signal as input. The latch includes a transparent state, and an output of the latch is employed as the first tap in a feedback path to an adder of a different path, wherein a partially resolved first tap in the feedback path is employed during the transparent state to provide a soft decision to supply correction information in advance of a hard decision of the latch. | 2008-12-18 |
20080310496 | Real-Time Key Frame Generation - The real-time generation of key frames in a media data stream is disclosed. One embodiment provides a method of processing encoded media data comprising receiving a request to play back the encoded media data from a media receiver, generating one or more key frames from the encoded media data, and sending the generated key frame or key frames to the media receiver. The key frames are generated by decoding the media data, and then encoding the key frames from the decoded media data. In this manner, a frequency of key frames in a media data stream may be increased to improve trick mode and 1× playback. | 2008-12-18 |
20080310497 | Method For Filtering, Transmitting and Receiving Scalable Video Streams, and Corresponding Programs, Server, Intermediate Node and Terminal - A method is provided for filtering a scalable video stream, organized in the form of data unit blocks, each of which comprises a base data unit and a set of data units distributed according to two types of enhancement data, corresponding respectively to time and/or space and/or quality characteristics and making it possible to define several quality levels. The method defines at least two distinct filtering profiles, or paths of each block data units, wherein each path defines a row of successive foldover positions and each foldover position uses at least by one less data units than a previous position, and selects one of the paths according to a predetermined criterion, taking into account the type of content of the stream and/or at least one information item representing the capacities of a terminal receiving the stream. | 2008-12-18 |
20080310498 | Information Recording/Reproducing Apparatus - There are provided an information recording/reproducing apparatus and a video camera, both compliant with plural standards and excellent in usability, within an advantageously earlier stage by simplifying a circuit configuration and reducing the development steps and time period. A compression/extension module includes a common compression/extension module which performs a process of a compression method common in plural standards. For example, the common compression/extension module common between the AVCHD standard and the BD standard performs a process of the H.264 compression method for a video signal, and performs a process of the Dolby Digital compression method for an audio signal. A format controlling module includes a common format generating module which performs a formatting process common in plural standards. For example, the common format generating module common between the AVCHD standard and the BD standard generates a format including data structures and directories, in compliance with the BDMV subset. | 2008-12-18 |
20080310499 | System and Method for Transmitting/Receiving Three Dimensional Video Based on Digital Broadcasting - Provided is a system and method for transmitting and receiving 3D video based on digital broadcasting. The system includes: an encoder for generating 2D ES and 3D supplementary ES by encoding 2D video and 3D supplementary data; a packetizer for generating 2D video PES and 3D supplementary PES by packetizing the 2D video ES and the 3D supplementary ES; a PSI generator for generating a PSI; a TS generator for generating 2D video TS and 3D supplementary TS for the 2D video PES and the 3D supplementary PES; a multiplexer for multiplexing the transport streams to transmit the 2D video TS as a normal stream and transmit the 3D supplementary TS, the PSI TS and 3D video synch data TS as robust stream; and a modulator for modulating the multiplexed TS according to a DTV specification and transmitting the modulated TS. | 2008-12-18 |
20080310500 | METHOD FOR ACTIVATION AND DEACTIVATION OF INFREQUENTLY CHANGING SEQUENCE AND PICTURE PARAMETER SETS - A method for activating and deactivating parameter sets during decoding of a bitstream for display, comprising the steps of: (A) tagging a first picture parameter information set associated with a first identification value as active in response to a reference to the first identification value in a bitstream; (B) changing the tag of the first picture parameter information set from active to inactive and tagging a second picture parameter information set associated with a second identification value as active in response to a reference to the second identification value in the bitstream; and (C) tagging the second picture parameter information set as inactive and re-tagging the first picture parameter information set as active in response to a subsequent reference to the first identification value in the bitstream. | 2008-12-18 |
20080310501 | APPARATUS AND METHODS FOR ENCODING, DECODING AND REPRESENTING HIGH DYNAMIC RANGE IMAGES - A data structure defining a high dynamic range image comprises a tone map having a reduced dynamic range and HDR information. The high dynamic range image can be reconstructed from the tone map and the HDR information. The data structure can be backwards compatible with legacy hardware or software viewers. The data structure may comprise a JFIF file having the tone map encoded as a JPEG image with the HDR information in an application extension or comment field of the JFIF file, or a MPEG file having the tone map encoded as a MPEG image with the HDR information in a video or audio channel of the MPEG file. Apparatus and methods for encoding or decoding the data structure may apply pre- or post correction to compensate for lossy encoding of the high dynamic range information. | 2008-12-18 |
20080310502 | INTER MODE DETERMINATION METHOD FOR VIDEO ENCODER - The present invention relates to a method for a video encoder to determine an inter mode. The video encoder selects initial candidate modes by using inter mode information of a previous frame so as to determine the inter mode, estimates a macroblock having the greatest correlation with a current macroblock in the previous frame, compares the rate-distortion cost of the corresponding macroblock and the rate-distortion cost of the selected mode from among the initial candidate modes, and determines whether to terminate the inter mode determination process early. When the early termination condition is satisfied, the video encoder determines the candidate mode having the minimum rate-distortion cost from among the initial candidate modes as the inter mode of the current macroblock, and terminates the inter mode determination process early. When the early termination condition is not satisfied, the video encoder additionally performs an inter prediction process by selecting additional candidate modes, and determines the candidate mode having the determined minimum rate-distortion cost as the inter mode of the current macroblock. | 2008-12-18 |
20080310503 | Method and apparatus for entropy-coding/entropy-decoding video data - Provided are a method and apparatus for entropy-encoding/entropy-decoding video data. The method of entropy-encoding video data includes binarizing coefficients of the frequency domain, which are generated by transforming a residual block of a current block into the frequency domain, using different binarization methods and performing binary arithmetic coding on the binarized coefficients. In this way, the coefficients are binarized adaptively according to whether the frequencies of the coefficients are high or low, thereby improving the compression efficiency of the video data. | 2008-12-18 |
20080310504 | ADAPTIVE COEFFICIENT SCANNING FOR VIDEO CODING - This disclosure describes techniques for scanning coefficients of video blocks. In particular, the techniques of this disclosure adapt a scan order used to scan a two-dimensional block of coefficients into a one-dimensional coefficient vector based on statistics associated with one or more previously coded blocks. For example, statistics that indicate the likelihood that a given coefficient value in each position of a two-dimensional block is zero or non-zero may be collected for one or more previously coded blocks. At some point, an adjustment to the scan order can be made in order to better ensure that non-zero coefficients are grouped together near the front of the one-dimensional coefficient vector, which can improve the effectiveness of entropy coding. The collection of statistics and adjustment of scan order may be made separately for each possible prediction mode. | 2008-12-18 |
20080310505 | TRANSMISSION OF PACKET DATA - A method for transmitting encoded video data includes determining an available space for transmitting an encoded video data in a last remaining information block of a video packet. The method further includes if the available space is sufficient, based on a comparison of the an estimated size of the encoded video data with the available space, then transmitting the encoded video data using the last remaining information block of the video packet. The method further includes if the available space is insufficient, changing a coding scheme associated with the encoded video data to transform the encoded video data into reduced size video data and transmitting the reduced size video data using the last remaining information block of the video packet. | 2008-12-18 |
20080310506 | Joint Spatio-Temporal Prediction for Video Coding - Systems and methods are described for joint spatio-temporal prediction (JSTP) during video coding. A given block of pixels is simultaneously predicted via inter frame prediction and intra frame prediction. The joint spatio-temporal prediction provides a new JSTP coding mode besides inter and intra modes in coding schemata such as the H.264/AVC video coding standard. In one implementation, subband decomposition obtains a high-pass component of inter frame prediction of a block and a low-pass component of intra frame prediction of the same block. The high-pass component of the inter prediction and the low-pass component of the intra prediction are combined to produce the joint spatio-temporal prediction. In one implementation, a difference between the original block and the JSTP prediction is coded in a bitstream to represent the block. | 2008-12-18 |
20080310507 | ADAPTIVE CODING OF VIDEO BLOCK PREDICTION MODE - This disclosure describes techniques for coding of header information of video blocks. In particular, the techniques of this disclosure select one of a plurality of prediction modes for use in generating a prediction block of a video block of a coding unit, the plurality of prediction modes including unidirectional prediction modes and multi-directional prediction modes that combine at least two unidirectional prediction modes. An encoding device encodes the prediction mode of the current video block based on prediction modes of one or more previously encoded video blocks of the coding unit. Likewise, a decoding unit receives encoded video data of a video block of a coding unit and decodes the encoded video data to identify one of a plurality of prediction modes for use in generating a prediction block of the video block based on prediction modes of one or more previously decoded video blocks of the coding unit. | 2008-12-18 |
20080310508 | METHOD OF FRAME INTERPOLATION FOR FRAME RATE UP-CONVERSION - A method of frame interpolation for frame rate up conversion method is provided. The method includes: determining a first adjusting value and a second adjusting value according to a target pixel in at least one of a first frame and a second frame; determining an interpolated pixel value of the target pixel in an interpolated frame between the first frame and the second frame according to the first adjusting value and a pixel value of the target pixel in one of the first and second frames; and adjusting a pixel value of the target pixel in one of the first and second frames according to the second adjusting value. | 2008-12-18 |
20080310509 | Sub-pixel Interpolation and its Application in Motion Compensated Encoding of a Video Signal - Reducing computational complexity when generating sub-pixel values for sub-pixel motion estimation from integer pixels. In an embodiment, half pixels in vertical and horizontal directions are computed by a applying a filter of first complexity on integer pixels, and a half pixel in diagonal direction is computed using a filter of lower complexity as compared to the filter of first complexity. Quarter (and other lower resolution pixels) pixels may also be generated using the half pixel in the diagonal direction. Thus, overall computational complexity is reduced in generating sub-pixels for sub-pixel motion estimation. | 2008-12-18 |
20080310510 | Image Coding, Recording and Reading Apparatus - An image coding, recording and reading apparatus generates a local decoded image which is used for motion compensation prediction at the same time when coding an original image to be coded so as to generate an original image coded stream, acquires a difference image which is a difference between the local decoded image and the original image to be coded, codes the difference image so as to generate a difference image coded stream, records the original image coded stream and the difference image stream generated thereby into a storage memory, and adds an original image and a difference image which are obtained by decoding both the above-mentioned coded streams read out of the storage memory, respectively, so as to generate an addition image. | 2008-12-18 |
20080310511 | Moving picture signal coding method, decoding method, coding apparatus, and decoding apparatus - Moving picture motion compensation coding/decoding predicts a motion vector in a coding block from a motion vector of the adjacent position and codes a differential motion vector calculated from the motion vector to be coded and its prediction motion vector. The coding is performed by switching the coding accuracy between a coding accuracy of the differential motion vector ( | 2008-12-18 |
20080310512 | SEPARABLE DIRECTIONAL TRANSFORMS - This disclosure describes techniques for transforming residual blocks of video data. In particular, a plurality of different transforms selectively applied to the residual blocks based on the prediction mode of the video blocks. At least a portion of the plurality of transforms are separable directional transform specifically trained for a corresponding prediction mode to provide better energy compaction for the residual blocks of the given prediction mode. Using separable directional transforms offers the benefits of lower computation complexity and storage requirement than use of non-separable directional transforms. Additionally, a scan order used to scan the coefficients of the residual block may be adjusted when applying separable directional transforms. In particular, the scan order may be adjusted based on statistics associated with one or more previously coded blocks to better ensure that non-zero coefficients are grouped near the front of the one-dimensional coefficient vector to improve the effectiveness of entropy coding. | 2008-12-18 |
20080310513 | HIGH-FIDELITY MOTION SUMMARISATION METHOD - Disclosed is a method ( | 2008-12-18 |
20080310514 | Adaptive Density Search of Motion Estimation for Realtime Video Compression - A motion estimation (ME) apparatus and method for approximating motion in a macroblock of an image. The ME method includes selecting at least one search center in the macroblock; searching for an adaptive density lattice, wherein the adaptive density lattice search results in a motion vector for the at least one selected search center; performing skip box search to refine the resulting motion vector; selecting a partition size for the macroblock utilizing the refined motion vector, resulting in a motion vector candidate; and performing a sub-pel refinement for the motion vector candidates. | 2008-12-18 |
20080310515 | MPEG-2 2-Slice Coding for Simple Implementation of H.264 MBAFF Transcoder - This invention is a 2-slice MPEG-2 coding method. The MPEG-2 standard defines the slice structure where that the first and the last macroblock of a slice are in the same horizontal row of macroblocks. Two vertically adjacent macroblocks belong to two different slices. Any MPEG-2 slice can be decoded or encoded independently of other slices in the same frame because there is no dependency between slices. Due to these properties, this invention can decode or encode two consecutive macroblock rows alternately to fit the H.264 MBAFF scan order. This reduces the external memory access bandwidth and imposes no frame delay between decoder and encoder. | 2008-12-18 |
20080310516 | IMAGE PROCESSING APPARATUS AND METHOD - An image processing apparatus includes: input means for inputting a video signal; decoding means for decoding the video signal; filtering means for performing predetermined filtering on the decoded video signal; and control means for calculating an average bit rate by dividing an amount of bits generated per predetermined data unit from the decoded video signal, and controlling a characteristic of the filtering in accordance with the average bit rate. When the video signal is input per image file, the control means calculates the average bit rate by dividing a file size of the image file by a playback time corresponding to the file size, and when the video signal input is sequentially input per picture, the control means calculates the average bit rate by dividing a sum of generated bits per picture for a predetermined number of frames by the predetermined number of frames and the frame rate. | 2008-12-18 |
20080310517 | Mobile Terminal - A mobile terminal includes: a decoder configured to decode compressed motion picture data to thereby generate motion picture data; and a display configured to have a screen where a motion picture in accordance with the motion picture data is displayed. The decoder changes quality of the motion picture in accordance with a size of a region in the screen where the motion picture is displayed. For example, the decoder reduces the quality of the motion picture with a decrease in the size of the region described above. Here, the quality of the motion picture refers to the number of frames of the motion picture or the resolution of the motion picture. In this way, the power consumption of the mobile terminal is reduced. | 2008-12-18 |
20080310518 | METHOD FOR REDUCING CHANNEL CHANGE TIME OF INTERNET PROTOCOL TELEVISION (IPTV) AND IPTV SERVICE PROVISION SERVER FOR IMPLEMENTING THE SAME - The present invention provides a method for reducing channel change time of an IPTV and an IPTV service provision server for implementing the same, which comprise: determining the type of each of individual channels to be provided to a user and the number of additional intraframes required to be inserted into video data to be provided via the channels; inserting the additional intraframes corresponding to the determined number into the video data; encoding the video data; and transmitting the encoded video data to a first router or a second router according to the determined channel type, before receiving a channel request signal from the user. | 2008-12-18 |
20080310519 | System, Apparatus, and Method for Single-Carrier Block Transmission with Adaptive Guard Interval - The system, apparatus and method of the present invention provides a single carrier block transmission with guard interval as a means of communications over multi-path channels that enables frequency domain equalization, and therefore, has many of the advantages of OFDM, but does not have some of the drawbacks such as high PAPR and the need for high resolution ADCs. While the use of guard intervals in single carrier communications enables low complexity detection of the signal, it reduces bandwidth efficiency. The present invention improves the bandwidth efficiency by adjusting the length of the guard interval adaptively. Also, by allowing both time-domain and frequency domain equalizations, besides improving bandwidth efficiency, the inventions allows for great flexibility in receiver design. | 2008-12-18 |
20080310520 | Transmission Links - A method includes providing first values depending on crosstalk among a plurality of transmission links. A number of crosstalk channels are selected from a plurality of crosstalk channels interfering with signal transmission on transmissions links. The selecting depends on the first values. | 2008-12-18 |
20080310521 | Signal transmission circuit and signal transmission system - A signal transmission circuit includes a transmitting circuit for outputting a transmitting signal to a transmission line, a parallel circuit including a capacitor and a first resistance connected between an output terminal of the transmitting circuit and the transmission line, and a series circuit including an inductor and a second resistance connected between an output side of the parallel circuit and a ground. | 2008-12-18 |
20080310522 | Sliding Map Detector for Partial Response Channels - An estimator of the noiseless output of a noisy partial response channel is described. The estimator operates recursively. In each iteration, the estimator processes a window of the N most recently received noisy channel outputs to compare subsequence metrics for all possible channel output subsequences of length N, and selects a noiseless subsequence with maximal posterior probability. One noiseless sample of the selected subsequence is output as an estimate of one of the channel outputs. | 2008-12-18 |
20080310523 | Method and Apparatus for Controlling Multi-Antenna Transmission in a Wireless Communication Network - Multi-antenna transmission control presented herein involves generating a set of virtual channel realizations at the transmitter that shares the same second-order statistics as the actual channel realizations observed for a targeted receiver. By making the control-related quantities of interest at the transmitter depend on the long-term statistics of the channel, the actual channel realizations are not needed for transmission control, e.g., for accurate Multiple-Input-Multiple-Output (MIMO) preceding. As such, the use of virtual channel realizations enables transmission control that approaches the “closed-loop” channel capacity that would be provided by full feedback of the (instantaneous) actual channel realizations, without requiring the overhead signaling burden that attends full feedback. | 2008-12-18 |
20080310524 | Methods and Systems For Varying Bus Frequencies - The present invention provides a method for receiving an instruction for varying the bus frequency from a current bus frequency to a new frequency. The method may include storing a group of parameters corresponding to a second frequency, disabling a link connected to the host bus at a first frequency while the host bus is being operated with parameters corresponding to the first frequency, updating the parameters for operating the host bus with the group of parameters, and enabling the link at the second bus frequency to operate the host bus with the group of parameters. | 2008-12-18 |
20080310525 | FFT-size detector and FFT-size detection method and cell search apparatus and cell search method in cellular system - An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values by multiplying the subcarrier values by a preamble code. A correlator calculates a plurality of differential correlations in the code-demodulated signal. An IFFT processor IFFT-processes the differential correlations by mapping the differential correlations to subcarriers. A maximum value detector detects a maximum value from the IFFT signal and calculates a timing offset using an IFFT output index having the maximum value. | 2008-12-18 |
20080310526 | Method, device, and apparatus for multi-stream multi-band transmission - A transmitter may include a set of stream groups, each including two or more streams producing a set of orthogonal frequency division multiplexed (OFDM) stream-symbols and a coding unit interleaving the stream-symbols into an interleaved signal. An input bit multiplexer may route an input data signal to be divided among each of the streams. An inverse fast Fourier transform unit may operate on a combined signal formed from interleaving the interleaved signals from each stream group. Each stream may include for example a baseband signal processor producing the OFDM stream-symbols. | 2008-12-18 |
20080310527 | CORRELATION INTERVAL SYNCHRONIZATION APPARATUS AND METHOD - The present invention is directed to a correlation interval synchronization apparatus and method. Correlation is firstly performed on received data, followed by searching peaks in accordance with the output of the correlation. Subsequently, peak intervals are acquired according to the peaks, and the peak interval where the synchronization head position resides is determined. Finally, the synchronization head position is identified within the associated peak interval. | 2008-12-18 |
20080310528 | METHOD AND SYSTEM FOR RESOURCE ALLOCATION FOR OFDM WIRELESS NETWORKS - According to an embodiment, the present invention provides a method for providing resource allocation in a wireless communication network. The method includes providing an access provider that is configured to perform orthogonal frequency division multiplexing (OFDM). The access provider is configured to allocate transmission resources. The method also includes providing a first plurality of terminals that are wirelessly connected to the access provider. The method further includes assigning the first plurality of terminals to a first scheduling group that is associated with a first plurality of resources. The first plurality of resources includes at least a first resource. The method additionally includes providing a second plurality of terminals that are wirelessly connected to the access provider. The method further includes assigning the second plurality of terminals to a second scheduling group that is associated with a second plurality of resources. | 2008-12-18 |
20080310529 | RADIO TRANSMITTING APPARATUS AND RADIO RECEIVING APPARATUS - A radio transmitting apparatus includes a calibration reference signal generator for generating a calibration reference signal for each of the subcarriers to be calibrated, a subcarrier modulator for modulating the calibration reference signal with the subcarrier, a radio transmitter for frequency-converting a baseband signal, which is the modulated signal, into a transmission signal in a radio frequency band, a radio receiver for frequency-converting the transmission signal in the radio frequency band supplied from the radio transmitter, into a baseband signal, a calibration coefficient measurer for calculating a calibration coefficient from the baseband signal output from the radio receiver, and a calibration coefficient multiplier for multiplying a transmission signal for each of the subcarriers and each of the antenna elements, by the calculated calibration coefficient. | 2008-12-18 |
20080310530 | Wireless Communication Apparatus and Wireless Communication Method - A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part ( | 2008-12-18 |
20080310531 | ROBUST CHANNEL ESTIMATION IN COMMUNICATION SYSTEMS - An apparatus for archiving robust channel estimation in a communication system includes a training sequence generator to generate a training sequence. A formatter inserts the training sequence to a frame. A transmitting module is employed to transmit the frame. The training sequence generator further includes a symbol generator to generate a plurality of training symbols satisfying a predetermined constraint such that the training symbols are insensitive to synchronization error and a training sequence forming unit that forms the training sequence from the training symbols generated by the training symbol generator. | 2008-12-18 |
20080310532 | Method for Signal Reception - In an OFDM mobile communications system, an algorithm for forming a preliminary estimate of the channel on pilot subcarriers is carried out. Based on this preliminary estimate, a channel property is estimated. This channel property is then used to decide whether to enter a mobile receiver mode or a stationary receiver mode. For example, in the mobile mode channel estimation is performed using only pilot symbols from the current symbol period, while in the static mode channel estimation is performed using pilot symbols from the current symbol period and pilot symbols from other symbol periods. | 2008-12-18 |
20080310533 | Mega-frame Initialization Packet Generation and Synchronous Re-generation with Bit Rate Adaptation for Single Frequency Networks with Multiple Modulation Schemes - A system and processes create a Mega-frame Initialization Packet such that remote MIP inserters can regenerate Transport Stream bit rate and MIPs for Single Frequency Networks with modulation schemes different from an incoming stream in a totally deterministic way. This process guarantees that all MIP re-generators having the same signal at the input and having the same modulation scheme generate exactly the same stream (bit exact) even in multiple locations. | 2008-12-18 |
20080310534 | WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus generates transmission signal including first and second pilot signal sequences allocated to first and second frequencies symmetrically located in relation to a center frequency, and third and fourth pilot signal sequences allocated to third and fourth frequencies symmetrically located in relation to the center frequency, quadrature-modulates the transmission signal, to obtain a quadrature modulation signal, quadrature-demodulates the quadrature modulation signal, to obtain a reception signal, extracts first to fourth pilot signal sequences from the reception signal, estimates a first transfer characteristic concerning first and second frequency by using first and second pilot signal sequences, estimates a second transfer characteristic concerning third and fourth frequencies using third and the fourth pilot signal sequences, generates a third transfer characteristic from which an influence of transmission IQ imbalance is removed by using first and second transfer characteristic, and estimates, from the third transfer characteristic, reception IQ imbalance characteristic. | 2008-12-18 |
20080310535 | METHOD AND APPARATUS FOR SYMBOL TRANSMISSION IN AN OFDM MOBILE COMMUNICATION SYSTEM - A mapping method and an apparatus, which uniformly distribute bits included in transmission symbols to various resource blocks in mapping the transmission symbols to the resource blocks for transmission in an OFDMA mobile communication system. A sub-packet generator generates a sub-packet by selecting symbols from coded symbols including a first bit group and a second bit group, the first bit group having a different priority than the second bit group. A divider divides each bit group of the sub-packet into as many bit streams as previously allocated resource blocks. A resource block mapper maps the divided bit streams to the resource blocks, respectively, and outputs the bit streams for transmission. | 2008-12-18 |
20080310536 | Adaptive joint channel estimation and data demodulation for OFDM systems - The present invention provides architectures and methods which implement adaptive joint channel estimation and data demodulation in wireless communication systems to provide enhanced performance of the communication link. While not limited to any particular air interface, such architectures and methods are particularly beneficial in OFDM systems. Channel estimates may be performed for pilot sub-carriers for a given OFDM symbol and filtering may then be performed for channel estimation of a given data subcarrier. Received symbols may be equalized and demodulated, and the channel estimate may be updated for the given data subcarrier. Such a procedure enables more accurate channel estimation and improved data demodulation, thereby enhancing system performance. | 2008-12-18 |
20080310537 | PORTABLE TERMINAL, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A portable terminal communicates with a plurality of base stations by use of an OFDM signal. The portable terminal includes a communication unit sending and receiving the OFDM signal to and from the base stations, a switching timing detector, and an OFDM signal controller. The switching timing detector detects switching timing at which handover and a normal state are switched therebetween. The OFDM signal controller changes a guard time length of the OFDM signal upon detecting the timing by the switching timing detector. | 2008-12-18 |
20080310538 | Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing - The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system ( | 2008-12-18 |
20080310539 | SYSTEMS AND METHODS FOR GENERATING AN ORTHOGONAL SIGNAL FROM SEQUENCES THAT ARE NOT MULTIPLES OF 2 - A method for generating orthogonal signals is described. A sequence is chosen. A determination is made if the chosen sequence is orthogonal. The sequence is converted from a time domain to a frequency domain if the sequence is not orthogonal. A determination is made if the length of the sequence is a multiple of a first quantity. An Inverse Fast Fourier Transform that is a multiple of the length of the sequence is chosen if the length of the sequence is not a multiple of the first quantity. | 2008-12-18 |
20080310540 | Signaling of implicit ACK/NACK resources - A method includes, in response to receiving implicit signaling of the radio resource, and in response to a plurality of wireless communication system cell-specific static and semi-static input parameters, determining a plurality of output parameters and allocating radio resources using the determined output parameters. Also disclosed are computer readable storage mediums for storing programs that operate in accordance with the methods, as well as various devices that operate in accordance with the methods and that include the computer readable storage mediums. | 2008-12-18 |
20080310541 | METHOD AND SYSTEM FOR SFBC/STBC IN A DIVERSITY TRANSMISSION SYSTEM USING ALAMOUTI CODES - Aspects of a system for SFBC and/or STBC in a diversity transmission system using a plurality of Alamouti codes may include a transmitting station that enables reception of signals via a wireless communication medium. The transmitting station may enable determination of a plurality of channel estimate values that are based on signal propagation characteristics of the wireless communication medium. A plurality of N weighting factor phase angles may be computed based on the plurality of channel estimate values, where N is an integer that is greater than 1. The transmitting station may enable transmission of a plurality of 2·N signals based on the plurality of N weighting factors. The plurality of 2·N signals may be encoded utilizing Alamouti coding. | 2008-12-18 |
20080310542 | Self-Adpting Transmission Scheme of the Channel Environment in the Multiantenna Wireless Transmission System - An adaptive transmission scheme of the channel environment in the multi-antenna wireless transmission system can raise the spectrum use rate and power efficiency of the communication system in fast. Comparing with the traditional single antenna input and single antenna output, the channel environment in MIMO wireless communication system is more complex. When the terminal is moving, the different types of channels between terminal and base station can be gone through and then its capacity can be changed more largely. It is characterized in: at first, obtaining the statistical channel information at the receiving end using the result of channel estimation; then, quantizing and encoding the obtained statistical channel information to get feedback bit information and send the feedback bit information to the transmitting end through a feedback channel; thereby using statistical information, the sending end calculates link self-adapting control parameters, which are used for controlling coding modulation and sending the pre-code; the sending end obtains the digital base band transmission signal using a characteristic mode transmission method and a random virtual space selection transmission method, and the receiving end carries out self-adapting receiving by the same parameters. | 2008-12-18 |
20080310543 | Modulator with Instantaneous Modulation Scheme Switching in Multi-Time Slot and Multi-Mode Operation, for a Wireless Communication Equipment - A modulator (M) which may be installed in a wireless communication equipment, comprises i) a modulation means (SPC, M | 2008-12-18 |
20080310544 | Digital communications system - In a base station, after CRC is added to transmission data as a detection code, the transmission data is subjected to error-correcting coding using a convolutional code based on tail biting, divided into four frames of P-BCH and transmitted. For this reason, at a mobile station, even if reception (synthesis) is started from any frame of P-BCH represented as (b- | 2008-12-18 |
20080310545 | Mixed Waveform Configuration for Wireless Communications - A mixed waveform configuration for wireless communications including a first portion that is modulated according to a single-carrier modulation scheme and a second portion that is modulated according to a multi-carrier modulation scheme. The waveform is specified so that a channel impulse response (CIR) estimate obtainable from the first portion is reusable for acquisition of the second portion. The first portion includes a preamble and header and the second portion typically incorporates the payload. | 2008-12-18 |
20080310546 | Method for Adapting Digital Data Transmission Parameters to Measured Repetitive Noise - Following a transmission comprising a plurality of symbols, an error measurement is generated for each symbol, so that one may distinguish between symbols having a relatively low error and symbols having a relatively high error. A bit rate to be used for subsequent transmission is determined as a function of error measurements of those symbols that have relatively low error and as a function also of the proportion of symbols having a relatively high error, such that the bit rate reduces as the proportion increases. Measurement of the error rate and/or the durations of high and low error conditions may also be used to set other transmission parameters such as error-correcting code and interleaver settings. | 2008-12-18 |
20080310547 | Multi-code precoding for sequence modulation - In accordance with an exemplary embodiment of the invention a method is provided to reduce a peak to average ratio with a multi-code transmission. The method includes precoding a plurality of symbols, modulating the precoded plurality of symbols using multi-codes including a plurality of orthogonal codes, and transmitting a signal comprising the modulated precoded plurality of symbols, where precoding is performed to reduce the peak to average ratio of the transmitted signal. | 2008-12-18 |
20080310548 | ORTHOGONAL FREQUENCY DIGITAL MULTIPLEXING CORRELATION CANCELLER - A correlation canceller modulates a communication signal over a plurality of channels and an epoch aperture by a plurality of interference response signals corresponding to linear response by one or more filtering effects to generate an inversely correlated communication signal. | 2008-12-18 |
20080310549 | Transmission controlling method in wireless communications system and receiver for use in the same system - The present invention relates to a transmission controlling method in a wireless communications system and a receiver for use in the same system. The invention aims at realizing power control (or transmit rate control) more effective than previous techniques by means of utilizing a certain relationship between an error rate and an evaluation amount relating to the estimation amount. Thus, a certain relationship is defined between the evaluation amount relating to a reception condition and an error rate on the receiver, and on the basis of this certain relationship, transmit power of the transmitter is controlled. | 2008-12-18 |
20080310550 | REDUNDANCY SYSTEM FOR A TELECOMMUNICATION SYSTEM AND RELATED METHODS - A redundancy system for a co-channel telecommunication system and related methods. Implementations of the redundancy system may include at least a first modulator and a second modulator having a symbol mapper coupled to a parallel bit signal. The symbol mapper may be configured to route each of a plurality of parallel bits received through the parallel bit signal to a plurality of significant bit signals. In a first implementation, a plurality of significant bit signal multiplexers may be used to switch the plurality of parallel bit signals to allow the first and second modulators to operate in either a redundant or operating mode. In a second implementation, a premapped symbol (PMSI) encoder and a PMSI decoder may be used to transmit the plurality of significant bit signals across an interface bus as a real dual-data rate (DDR) signal and an imaginary DDR signal. | 2008-12-18 |
20080310551 | Decoder for 4QAM-NR and method thereof - A 4QAM-NR decoder and decoding method are disclosed. The 4QAM-NR decoder, obtains original data corresponding to receiving data received by a receiving terminal. The 4QAM-NR decoder comprises a determining device, an improving device and a corresponding device. The determining device provides a determining method to determine whether the receiving data is improved or not. The improving device improves the receiving data. The corresponding device obtains the approximate original data corresponding to the receiving data. | 2008-12-18 |
20080310552 | Ramping in Multimode Transmitters Using Primed Filters - A modulation system can switch between two modulation modes. In order to comply with limits on peak power in spectral bands outside the RF operating one the transmitter is required to ramp down to a condition of minimal power. To avoid fixed ramping and trailing bits, the transmitting signal is subjected to FIR filtering. The two FIR filters are primed with a sequence using a parallel input mode before serially entering the information data. | 2008-12-18 |
20080310553 | Baseband Process Method Based on Doubling Sampling - A baseband processing method based on double sampling, including: subjecting a received signal to root raised cosine-filtering process; sampling said signal; conducting channel estimation for every user based on the sampled data; and conducting multi-user joint detection and demodulation for said data. Wherein, the step of sampling said signal includes the following steps: conducting double sampling for said signal, and the interval of the sampling being ½ chip; each chip selecting the average value of two sampling values as the sampling value of the chip; assembling the sampling value of every chip into a data stream. According to the present invention, in the case that the complexity of computation is not increased and only the memory space is doubled, the gain of the received signal in the system is improved effectively, especially when the synchronization of signals is bad, relatively large gain of the signals can be obtained, the system delay is reduced, and the real-time property of signal processing is improved. The method according to the present invention is suitable to the mobile communication system in a bad communication environment. | 2008-12-18 |