01st week of 2009 patent applcation highlights part 35 |
Patent application number | Title | Published |
20090003406 | Thermal switch calibration apparatus and methods - An apparatus and method for testing thermal switches is disclosed including modulating the temperature of a receiver in thermal contact with a thermal switch at a first rate within a range containing the nominal switch temperature of the thermal switch. A first temperature at which the switch changes state is recorded. The temperature is then modulated at a second rate and a second temperature at which the switch again changes state is recorded. The temperature may be modulated at a third rate slower than the second rate to determine a third temperature. The first, second, and third switch temperatures are then processed and output to an operator. The first, second, and third rates may be determined according to an exponentially decreasing function. | 2009-01-01 |
20090003407 | Nondestructive Residential Inspection Method and Apparatus - This invention provides an apparatus for nondestructive residential inspection and various methods for using a thermal imaging apparatus coupled to inspect exterior residential components, interior residential component, for mold. More specifically, this invention provided a computerized method to facilitate inspecting a residential building. | 2009-01-01 |
20090003408 | THERMAL ICING CONDITIONS DETECTOR - A sensor for detecting icing conditions in an airstream includes a flow housing mounted on an aircraft and in which one or more probes are mounted. At least one of the probes subjected to impingement of the airstream and liquid moisture droplets in such airstream. The heat removal, or cooling effect on the probe in the airstream carrying liquid droplets is determined. A temperature signal indicating the airstream temperature is combined with signals from the at least one probe for determining whether or not icing conditions are present. | 2009-01-01 |
20090003409 | Temperature sensor and semiconductor memory device using the same - A semiconductor memory device includes a temperature sensor. The temperature sensor includes a temperature data signal generator and a temperature signal extractor. The temperature data signal generator generates temperature data signals for respective temperate ranges of internal temperature. The temperature signal extractor receives the temperature data signals and a pulse signal with a predetermined cycle, extracts the temperature data signal that is activated for at least two cycles of the pulse signal, and generates a temperature signal corresponding to the extracted temperature data signal. | 2009-01-01 |
20090003410 | Sytems and methods for dissipating heat generated during an electrical measurement - Systems and methods for dissipating heat generated during an electrical function are disclosed. In particular, the disclosed systems and methods can be used for dissipating heat generated during low impedance measurement on a multimeter. In some embodiments, the multimeter can include a first thermistor coupled in series with a resistor in a measurement path, a second thermistor, and a switch coupled to the measurement path and the second thermistor for selectively including the second thermistor in the measurement path during a low impedance measurement. | 2009-01-01 |
20090003411 | HIGH-TEMPERATURE SENSING SYSTEM WITH PASSIVE WIRELESS COMMUNICATION - A high-temperature sensing system for sensing at least one parameter of interest within a high-temperature environment is provided. The system includes a substrate having at least one electrical network disposed thereon. Each of the at least one electrical network is a tuned circuit having a resonant frequency, and a temperature sensitive electrical component that varies the resonant behavior of the tuned circuit with a parameter of interest. An antenna is disposed to interact with the at least one electrical network. Transmit/receive electronics are spaced from the high-temperature environment and coupled to the antenna. The transmit/receive electronics are configured to generated selected drive signals to address each of the at least one electrical network and to detect a modulated radio-frequency reflection. A processor is coupled to the transmit/receive electronics and configured to calculate a parameter of interest for each detected modulated radio-frequency reflection. | 2009-01-01 |
20090003412 | SPREAD SPECTRUM RADAR APPARATUS - To provide a spread spectrum radar apparatus which can lower the probability for misidentifying a presence of object. The spread spectrum radar apparatus includes: a pseudo-noise code for transmission generation unit which generates a pseudo-noise code for transmission; a spread spectrum modulation unit which performs spread spectrum modulation on a carrier wave using the pseudo-noise code for transmission; a pseudo-noise code for receiver generation unit which generates a pseudo-noise code for receiver which is a time-delayed pseudo-noise code for transmission; a spread spectrum demodulation unit which performs spread spectrum demodulation on a received signal, using the pseudo-noise code for receiver, so as to output a correlation signal; a code change control unit which changes the pseudo-noise codes for transmission and receiver into a different kind of the pseudo-noise codes at every predetermined time; and a correlation value calculation unit which averages or integrates, with the number of kinds of the generated pseudo-noise codes, an intensity of the correlation signal. | 2009-01-01 |
20090003413 | Real-Time Data Transmission Method Using Frequency Hopping Spread Spectrum - The invention relates to a real-time data transmission method, and more particularly to a real-time data transmission method using a Frequency Hopping Spread Spectrum (FHSS) in which a frequency channel, which causes no interference in real-time data transmission, is found to transmit data. In this method, when data is transmitted in real time through a setting channel, a channel in good state is acquired after a setting time through comparison with a test channel and, to prepare for interference that may occur during data transmission, the setting channel is previously changed to another channel before interference occurs, so that real-time data is transmitted while maintaining the continuity of data transmission, thereby minimizing data loss. | 2009-01-01 |
20090003414 | UNIFIED MMSE EQUALIZATION AND MULTI-USER DETECTION APPROACH FOR USE IN A CDMA SYSTEM - A unified minimum mean square error (MMSE) equalization/multi-user detection (MUD) approach for demodulating direct sequence CDMA (DS-CDMA) signals is described. In at least one embodiment, the unified approach is capable of generating a variety of cost-effective receiver demodulation techniques that may range from, for example, a low cost linear MMSE equalization technique to a relatively high complexity MMSE MUD. | 2009-01-01 |
20090003415 | RAKE RECEIVER AND DE-SPREADING METHOD THEREOF - The invention relates to a rake receiver and a method for de-spreading thereof. A plurality of noise branches is adopted for producing a plurality of noise components in the rake receiver. Next, a noise combining unit adjusts each noise component according to a plurality of noise weights, so as to combine the noise components to obtain an interference-plus-noise estimation value. The rake receiver eliminates the noises in the main signal generated by the signal branches through using the interference-plus-noise estimation value. Therefore, the performance of a receiving terminal can be enhanced. | 2009-01-01 |
20090003416 | Apparatus and method for canceling interference in wireless communication system - An apparatus and a method for canceling interference using a space-frequency block coding in a multi-antenna system. The method includes confirming a code for coding to minimize a Pairwise Error Probability (PEP) of a transmit signal of which the PEP is maximized according to a time variation; and coding the transmit signal with the code and transmitting the coded signal via at least two antennas. Accordingly, the interference cancellation can be accomplished while lowering the complexity of the receiver without degrading the spectral efficiency. | 2009-01-01 |
20090003417 | Interface Circuit for Transmission of Digital Signals - The transmission branch of an interface circuit has a transformer. On the input side there are applied to the transformer, for example from a controller, high-frequency impulses. The output side of the transformer controls a switch, such as for example a power transistor, which modulates the desired digital signals onto a connected bus line. | 2009-01-01 |
20090003418 | Systems, Methods, Devices And/Or Computer Program Products For Providing Communications Deviod Of Cyclostationary Features - A wireless communications system configured for Low Probability of Intercept (LPI), Low Probability of Detection (LPD) and/or Low Probability of Exploitation (LPE) communications may use waveforms substantially devoid of a cyclostationary signature to improve a LPI/LPD/LPE property. A set of M independent “seed” waveforms that satisfy a time-bandwidth constraint may be used via a Gram-Schmidt Orthogonalization (GSO) procedure to generate M orthonormal functions. In accordance with exemplary embodiments, the M seed waveforms may be chosen from a band-limited Gaussian-distributed process and may be used to generate, via an orthogonalization operation a corresponding set of M Gaussian-distributed orthonormal functions substantially devoid of a cyclostationary property. | 2009-01-01 |
20090003419 | TRANSCEIVER FOR RECEIVING AND TRANSMITTING DATA OVER A NETWORK AND METHOD FOR TESTING THE SAME - The present invention provides a transceiver for receiving and transmitting data over a network, and a method for testing the same. In particular, the present invention provides a physical layer transceiver having a built-in-self-test (BIST) device that allows for, among other things, pulse density/width variation and jitter control. | 2009-01-01 |
20090003420 | SYSTEMS AND METHODS FOR EMBEDDING A FIRST SIGNAL IN THE CODING OF A SECOND SIGNAL - A method for embedding a first signal in the coding of a second signal is described. A value of the first signal is determined. A codebook based on the value of the first signal is generated. A second signal is encoded using a codeword from the generated codebook. The encoded second signal is modulated into a plurality of symbols, wherein the symbols are distributed according to the value of the first signal. The modulated symbols are inserted into one or more time slots of a sequence. | 2009-01-01 |
20090003421 | TIME-DOMAIN EQUALIZATION FOR DISCRETE MULTI-TONE SYSTEMS - A multiple carrier communication system includes a primary impulse shortening filter that receives an output signal of an analog to digital converter and accepts coefficients. A secondary impulse shortening filter receives the output signal of the analog to digital converter, outputs an output signal, and passes coefficients to the primary impulse shortening filter. A reference signal generator outputs a reference signal. A comparator compares the output signal and the reference signal and outputs a resulting error signal. An adaptive processor computes coefficients for the secondary impulse shortening filter based on the error signal. | 2009-01-01 |
20090003422 | Methods and systems for detecting repetitive synchronized signal events - Repetitive synchronized signal events may be detected in received raw signal data that contains a signal. The type of signal, element length (or minimum interval) and/or other characteristics of such repetitive synchronized signal events may also be optionally determined. The disclosed methods and systems may be implemented for processing signals in real time as part of a receiver or transceiver system, or may be implemented by one or more computer processing components that are configured to process stored raw signal data or signal data received from another source, such as across a computer network. | 2009-01-01 |
20090003423 | Frequency Offset Estimation Apparatus and Method in Wireless Communication System - The present invention relates to an apparatus and method for estimating a frequency offset in a wireless telecommunication system. The present invention does not estimate an initial frequency offset using a preamble which is the initial symbol of a frame upon estimation of the frequency offset in the wireless telecommunication system, but estimates a frequency offset using correlation of a cyclic prefix (CP) existing in each symbol, thereby eliminating a need to reproduce information about separate preamble signals and preamble signals, and easily estimating a frequency offset using only input signals. | 2009-01-01 |
20090003424 | Ic Testing Methods and Apparatus - A method is provided for testing an integrated circuit comprising multiple cores, with at least two cores having different associated first and second clock signals of different frequencies. A test signal is provided using a clocked scan chain clocked at a test frequency (TCK). A transition is provided in a clock circuit reset signal (clockdiv_rst) which triggers the operation of a clock divider circuit ( | 2009-01-01 |
20090003425 | Inter-carrier Interference Measurement In Orthogonal Frequency Division Multiplexing Systems - A system for measuring inter-carrier interference (ICI) in an OFDM system includes a test symbol generator coupled to a transmitter of the OFDM system to generate an N*N orthogonal matrix having N*N test symbols, and to send the test symbols in a test symbol stream via the transmitter to a receiver of the OFDM system. The N*N test symbols are arranged by the test symbol generator into an N*N orthogonal matrix before being sent to the receiver. The system also includes an ICI measuring module coupled to the receiver to detect the N*N test symbols received in the receiver and to arrange the test symbols as a receiving matrix in the same way as the orthogonal matrix in the transmitter. The ICI measuring module outputs the receiving matrix as an ICI matrix of the OFDM system, wherein an element on the kth row, lth column of the ICI matrix represents interference from the lth sub-carrier on the kth sub-carrier, wherein k≠l. | 2009-01-01 |
20090003426 | Adaptive Error Counter for a Wireless Field Device - A transmitting and receiving unit is provided for a field device for measuring a filling level or a pressure, which has an adaptive error counter. In this way, the sensitivity of the error detection may be adapted to individual needs or to the present length of the communications section. Thus, during wireless communication an optimally set error counter may fundamentally be used according to the distance to be covered without any adjustment needing to be made for this on the user side. | 2009-01-01 |
20090003427 | BURSTY INTERFERENCE SUPPRESSION FOR COMMUNICATIONS RECEIVERS - Techniques are provided for suppressing interference by taking into account the possible bursty nature of co-channel interference in a communication system. In an aspect, interference levels are separately computed for first and second data portions of a desired signal. The computed interference levels may be used to scale the corresponding data portions for subsequent processing. | 2009-01-01 |
20090003428 | Method and apparatus for treating a signal - A method includes: delaying an excursion of at least one signal a first number of clock phases when the excursion departs from a value in a first direction; and delaying the excursion of the at least one signal a second number of the clock phases when the excursion departs toward the value in a second direction. The first number of clock phases is different from the second number of clock phases. The at least one signal effects a plurality of succeeding excursions in substantial synchrony with a clocked signal presenting succeeding clock cycles having a plurality of the clock phases in each respective clock cycle. | 2009-01-01 |
20090003429 | Apparatus And Method For Processing A Bitstream - Method and apparatus for processing a first bitstream are provided. The apparatus comprises an extraction unit and a generation unit. The extraction unit extracts an NAL unit from the first bitstream. The generation unit, coupled to the extraction unit, receives the NAL unit to generate a second bitstream according to the NAL unit. The second bitstream comprises a piece of information related to the NAL unit. The method comprises the steps of extracting an NAL unit from the first bitstream and generating a second bitstream comprising a piece of information related to the NAL unit. | 2009-01-01 |
20090003430 | Video Coding Using Spatio-Temporal Texture Synthesis - Systems and methods for video coding using spatio-temporal texture synthesis are described. In one aspect, a video data coding pipeline portion of the codec removes texture blocks from the video data to generate coded video data. The removed texture blocks are selected based on an objective determination that each of the remove texture blocks can be synthesized from spatio-temporal neighboring samples during decoding operations. The objective determinations are made using local block-based motion information independent of global motion models. An indication of which texture blocks were removed is provided to a decoder in addition to the coded video data. Decoding logic of the codec decodes the video data using a standard decoding algorithm. The decoding logic also restores the removed texture blocks via spatio-temporal texture synthesis to generate synthesized video data. The decoded and synthesized video data is presented to a user. | 2009-01-01 |
20090003431 | Method for encoding video data in a scalable manner - The invention concerns a method for encoding video data in a scalable manner according to H.264/SVC standard. The method comprises the steps of
| 2009-01-01 |
20090003432 | Expedited splicing of video streams - In one embodiment, a method is described that includes receiving a conditioned bitstream that includes a digital insertion location and primary network packets that contain compressed video data. The digital insertion location includes replaceable network packets. The method also includes receiving a second bitstream that includes replacement compressed video data. The method also includes determining a location of the digital insertion location. The method further includes adjusting the bitrate of the replacement compressed video data to create adjusted replacement compressed video data. The method further includes providing timestamp information with the replacement compressed video data. The method additionally includes packetizing the adjusted replacement compressed video data and timestamp information into replacement network packets. The method further includes combining the replacement network packets into the digital insertion location in the conditioned bitstream at the network packet level without depacketizing or decompressing the compressed video data in the primary network packets. | 2009-01-01 |
20090003433 | TRANSCODER AND TRANSCODING METHOD - A transcoder has been disclosed, which does not produce extra high frequency components or lower the compression rate even when the size of a decoded image is changed and the boundaries of macro blocks at the time of decoding and the boundaries of macro blocks at the time of re-encoding do not match each other. The transcoder comprises: a decoder that decodes image data encoded in a first format and outputs a decoded image; and an encoder that re-encodes the decoded image data into a second format, and further comprising: a scaler that changes the size of the decoded image; and a filter that carries out filtering processing for reducing high frequency components for pixels in the vicinity of the boundaries of macro blocks of the decoder in the decoded image, which do not match the boundaries of macro blocks of the encoder before or after the size is changed. | 2009-01-01 |
20090003434 | METHOD AND APPARATUS FOR COMPOSING SCENE USING LASeR CONTENTS - A method and apparatus for transmitting and receiving LASeR contents are provided, in which content including at least one of a scene element and a scene element set that includes the scene element is received, for use in scene composition, and a scene is composed by selecting at least one of the at least one of the scene element and the scene element set included in the content according to at least one of a terminal type, a user preference, and a content-serviced party. | 2009-01-01 |
20090003435 | Method, medium, and apparatus for encoding and/or decoding video data - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream compatible with at least two video formats generating an enhancement layer identifier, generating a base layer bitstream by encoding a chrominance component of a low-frequency band and a luminance component that are included in video, and generating an enhancement layer bitstream by encoding a chrominance component of the remaining frequency band other than the low-frequency band that is included in the video. | 2009-01-01 |
20090003436 | Dynamically Adapting Media Streams - Tools and techniques for dynamically transcoding media streams are described herein. These tools may provide machine-readable storage media that contain machine-readable instructions that, when executed by the machine, cause the machine to define initial transcoding schemes under which media streams are to be transcoded as they passes between endpoints. In response to changes in conditions affecting the media streams, the machine may dynamically update the initial transcoding scheme. | 2009-01-01 |
20090003437 | Method, medium, and apparatus for encoding and/or decoding video - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream supporting at least two bit-depths with forward compatibility, wherein the scalable bitstream comprises a base layer bitstream including a base quantization level and a base quantization parameter corresponding to a base bit-depth, and an enhancement layer bitstream including residue between an extended quantization level and a compensated quantization level that is predicted from the base quantization level, and a refined quantization parameter for refining the difference between an extended bit-depth and the base bit-depth. | 2009-01-01 |
20090003438 | Fixed bit rate, intraframe compression and decompression of video - High quality intraframe-only compression of video can be achieved using rate distortion optimization and without resizing or bit depth modification. The compression process involves transforming portions of the image to generate frequency domain coefficients for each portion. A bit rate for each transformed portion using a plurality of scale factors is determined. Distortion for each portion is estimated according to the plurality of scale factors. A scale factor is selected for each portion to minimize the total distortion in the image to achieve a desired bit rate. A quantization matrix is selected according to the desired bit rate. The frequency domain coefficients for each portion are quantized using the selected plurality of quantizers as scaled by the selected scale factor for the portion. The quantized frequency domain coefficients are encoded using a variable length encoding to provide compressed data for each of the defined portions. The compressed data is output for each of the defined portions to provide a compressed bitstream at the desired bit rate. | 2009-01-01 |
20090003439 | System and method for indicating temporal layer switching points - Disclosed are a system, apparatus, computer programs and methods for indicating proper temporal layer switching points for temporal scalable coding. Various embodiments provide an apparatus and method for properly indicating temporal layer switching points in a scalable video bit stream or in a scalable video file container. Using these indications, a decoder can determine where to perform temporal layer switching, after which all of the pictures at and below the desired temporal layer can be correctly decoded. | 2009-01-01 |
20090003440 | SUB-BAND SCANNING TECHNIQUES FOR ENTROPY CODING OF SUB-BANDS - This disclosure describes techniques useful in the encoding and/or decoding of video data of a video sequence. In general, this disclosure sets forth scanning techniques useful in the context of sub-band coding, which may improve the level of compression that can be achieved by entropy coding following sub-band coding. In one example, a method of encoding video data of a video sequence comprises sub-band encoding the video data to generate a plurality of sub-bands, scanning each of the sub-bands from two-dimensional blocks into one-dimensional vectors based on scan orders defined for each of the sub-bands, and entropy encoding each of the scanned sub-bands. | 2009-01-01 |
20090003441 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation. | 2009-01-01 |
20090003442 | INFORMATOIN PROCESSING APPARATUS, CONVERSION CIRCUIT, AND PROGRAM - According to one embodiment, an information processing apparatus includes a first determination unit which determines whether or not a processing target frame is a frame of the predetermined type, a second determination unit which determines whether or not an interval between the frame and a frame of the predetermined type located temporally nearest in a forward direction exceeds a predetermined frame count, when the first determination unit determines that the processing target frame is not a frame of the predetermined type, and a conversion unit which converts the processing target frame into a frame of the predetermined type, when the second determination unit determines that the interval exceeds the predetermined frame count. | 2009-01-01 |
20090003443 | PRIORITY-BASED TEMPLATE MATCHING INTRA PREDICTION VIDEO AND IMAGE CODING - Template matching intra prediction based on a given priority is provided. Priority values of all, or a subset of the pixels on a border between a current block and a reconstructed area are calculated. A border pixel with the highest priority is used as the center of a template block. A search for the best matched candidate template is performed in the reconstructed area. Distortion metrics between known pixels in the to-match template and corresponding pixels in candidate templates are calculated and compared. The candidate template with the smallest distortion metric value is chosen as the best match. Corresponding pixels of the best-matched candidate template in the searching area are used as predictors of the unknown pixels in the template centered at the pixel with the highest priority, and the predicted pixels are marked as known. The process is repeated until all pixels in the current block are marked as known. | 2009-01-01 |
20090003444 | METHOD AND APPARATUS FOR VIDEO ENHANCEMENT BY REORGANIZING GROUP OF PICTURES - A method and apparatus for video enhancement by selectively reorganizing a group of pictures (GOP). The method includes counting the number of error blocks of a current frame to be decoded from among a plurality of frames included in the GOP; determining whether to display the current frame and one or more subsequent frames in accordance with the number of error blocks; and reorganizing a GOP with frames determined to be displayed and displaying the reorganized GOP. | 2009-01-01 |
20090003445 | Method and Apparatus for Constructing Reference Picture Lists for Scalable Video - In video coding, prediction of P- and B-frames is based on reference frames, which are indicated by reference picture lists. Scalable video coding (SVC) requires this for both, base-layer and enhancement-layer. The invention describes a decoding process for reference picture list construction for spatial enhancement layer. With just one flag of syntax modification, it provides simpler and direct reference lists construction process. By using this, complicated RPLR and other syntaxes can be skipped, and the RPLR process for spatial enhancement layer can also be avoided. The process also can be used as for error concealment when the spatial enhancement layer slice is lost. | 2009-01-01 |
20090003446 | Computing collocated macroblock information for direct mode macroblocks - Video decoding innovations for multithreading implementations and graphics processor unit (“GPU”) implementations are described. For example, for multithreaded decoding, a decoder uses innovations in the areas of layered data structures, picture extent discovery, a picture command queue, and/or task scheduling for multithreading. Or, for a GPU implementation, a decoder uses innovations in the areas of inverse transforms, inverse quantization, fractional interpolation, intra prediction using waves, loop filtering using waves, memory usage and/or performance-adaptive loop filtering. Innovations are also described in the areas of error handling and recovery, determination of neighbor availability for operations such as context modeling and intra prediction, CABAC decoding, computation of collocated information for direct mode macroblocks in B slices, reduction of memory consumption, implementation of trick play modes, and picture dropping for quality adjustment. | 2009-01-01 |
20090003447 | Innovations in video decoder implementations - Video decoding innovations for multithreading implementations and graphics processor unit (“GPU”) implementations are described. For example, for multithreaded decoding, a decoder uses innovations in the areas of layered data structures, picture extent discovery, a picture command queue, and/or task scheduling for multithreading. Or, for a GPU implementation, a decoder uses innovations in the areas of inverse transforms, inverse quantization, fractional interpolation, intra prediction using waves, loop filtering using waves, memory usage and/or performance-adaptive loop filtering. Innovations are also described in the areas of error handling and recovery, determination of neighbor availability for operations such as context modeling and intra prediction, CABAC decoding, computation of collocated information for direct mode macroblocks in B slices, reduction of memory consumption, implementation of trick play modes, and picture dropping for quality adjustment. | 2009-01-01 |
20090003448 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation. | 2009-01-01 |
20090003449 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation. | 2009-01-01 |
20090003450 | Image Decoder - The present invention provides an image decoder which decodes a stream encoded with standard resolution and transforms it into a high-definition image with a better image quality. An intra-field pixel interpolation module generates an interpolated pixel using pixels in a field. An inter-field pixel interpolation module generates an interpolated pixel using pixels from another field. A weighted averaging module refers to the prediction mode used in predictive encoding for the coded stream. If the prediction mode is a field prediction mode, it increases the mixture ratio of interpolated pixels generated by the intra-field pixel interpolation module, and if the prediction mode is a frame prediction mode, increases the mixture ratio of interpolated pixels generated by the inter-field pixel interpolation module. | 2009-01-01 |
20090003451 | SHARED PIPELINE ARCHITECTURE FOR MOTION VECTOR PREDICTION AND RESIDUAL DECODING - A shared pipeline architecture is provided for H.264 motion vector prediction and residual decoding, and intra prediction for CABAC and CALVC entropy in Main Profile and High Profile for standard and high definition applications. All motion vector predictions and residual decoding of I-type, P-type, and B-type pictures are completed through the shared pipeline. The architecture enables better performance and uses less memory than conventional architectures. The architecture can be completely implemented in hardware as a system-on-chip or chip set using, for example, field programmable gate array (FPGA) technology or application specific integrated circuitry (ASIC) or other custom-built logic. | 2009-01-01 |
20090003452 | WYNER-ZIV SUCCESSIVE REFINEMENT VIDEO COMPRESSION - Improved methods, systems, and devices for Wyner-Ziv video compression are provided based on the disclosed successive resolution refinement techniques. The disclosed resolution refinement schemes improve rate-distortion performance, visual quality and decoding speed with lower complexity than conventional bitplane refinement methods. The disclosed details enable various refinements and modifications according to system design considerations. | 2009-01-01 |
20090003453 | HIERARCHICAL PACKING OF SYNTAX ELEMENTS - A method of operation within an integrated circuit device having a plurality of processing lanes. A first sub-stream of data, having a variable length, is generated in a first one of the processing lanes. A second sub-stream of data, also having a variable length, is generated in a second one of the processing lanes. The first and second sub-streams are then output to form a single bitstream. | 2009-01-01 |
20090003454 | Method and Apparatus for Real-Time Frame Encoding - A device incorporates a software-based H.264 video encoder for providing compressed, or encoded, video data. The H.264 encoder incorporates a timer algorithm such that the time available to the H.264 encoder within the macroblock mode decision and motion estimation framework is constrained, or restricted. The particular amount of time available to the H.264 encoder then determines a subset of available encoding modes that the H.264 encoder can use to encode a macroblock. | 2009-01-01 |
20090003455 | METHOD AND APPARATUS FOR ILLUMINATION COMPENSATION IN MULTI-VIEW VIDEO CODING - Disclosed is a method and apparatus for illumination compensation in a multi view video coding. The method includes deriving a predicted illumination compensation value of the current block by using information on neighbor blocks of the current block when a current block performing illumination compensation is in a skip mode; setting the current block not to perform the illumination compensation when the derived predicted illumination compensation value is 0 and setting the current block to perform the illumination compensation when the derived predicted illumination compensation value is not 0. | 2009-01-01 |
20090003456 | Device and Method for Encoding/Decoding Video Data - A video data encoding/decoding device and method are disclosed. The decoding device includes a syntax parsing unit, storing a plurality of element information, generated by syntax parsing of a bit stream using description information, in an element information storing unit; a connection controlling unit, successively selecting a plurality of functional units by using the description information, and selectively inputting element information predetermined for the selected functional unit of the plurality of element information stored in the element information storing unit; and a processing unit, comprising at least a functional unit performing a process predetermined by using the element information inputted by the connection controlling unit, and outputting corresponding result data. Accordingly, the present invention can decode a bit stream, decoded by various format in accordance with various standards, by using an identical information recognizing method. | 2009-01-01 |
20090003457 | Inverse Tone Mapping for Bit-Depth Scalable Image Coding - A method performs inverse tone mapping of an image in a decoder. For each block of each color channel of the image the following steps are performed. A scaling factor is determined for a current block of the image by adding a predicted scaling factor for the current block to a difference between the predicted scaling factor and the scaling factor of an adjacent block. An offset value for the current block is determined by adding a predicted offset for the current block to a difference between the predicted offset value and the offset value of the adjacent block. The scaling factor and the offset value are applied to pixel intensity values of the current block to produce a mapped block in which a bit-depth of the mapped block is greater than the bit-depth of the current block. | 2009-01-01 |
20090003458 | VIDEO TRANSCODING QUALITY ENHANCEMENT - System and methodologies are provided herein for reconstructing a video signal from multiple video streams. Various aspects described herein can utilize a least square estimate (LSE) algorithm to jointly decode multiple video bitstreams that are generated from a common original video sequence at different bit rates. As described herein, the LSE algorithm can reconstruct an original video sequence by determining and computing a weighted sum of collocated video information reconstructed from different video bitstreams. The weights applied can be adaptively determined to minimize the mean square error (MSE) of the reconstructed video sequence as compared to the original. | 2009-01-01 |
20090003459 | 8VSB DTV signals with PCCC and subsequent trellis coding - Data to be more robustly transmitted within 8VSB broadcast DTV signals are turbo coded using parallelly concatenated convolutional coding (PCCC) and incorporated within the segments of data fields, the bytes of which are convolutionally interleaved before trellis coding and 8VSB symbol mapping. Packing the PCCC into payload fields of MPEG-2-compatible null data packets and Reed-Solomon coding the packets to generate the segments of data fields, the bytes of which are convolutionally interleaved, conditions legacy DTV receivers to disregard PCCC components not useful to them. Transversal packing turbo-coded Reed-Solomon codewords into the payload fields of MPEG-2-compatible null data packets increases the capability of those turbo-coded Reed-Solomon codewords to overcome burst errors. Repeated transmissions of the transversally packed turbo-coded Reed-Solomon codewords in whole or in part allows them to overcome protracted deep fades encountered during mobile reception of 8VSB DTV signals. | 2009-01-01 |
20090003460 | ENCODING APPARATUS AND ENCODING METHOD - To ease operations by a user carried out for compression-encoding video data and mitigate operational errors that might be caused upon the compression-encoding. In an encoding apparatus, an encode information input accepting section accept an input of first encode information used when video data is compression-encoded, a parameter setting section sets a parameter used when each short section is compression-encoded as a first parameter on the basis of the first encode information, an output section displays a change screen for changing the parameter while following a previously created chapter file, a parameter change section change the parameter from the first parameter to a second parameter on the basis of change information, a GOP configuration determination section determines a GOP configuration by using the first parameter while following the chapter file, and a compression-encoding section | 2009-01-01 |
20090003461 | ERROR CONCEALING METHOD AND APPARATUS ADAPTIVE TO CHARACTERISTICS OF BLOCKS ADJACENT TO LOST BLOCK - An error concealment method and apparatus that are adaptive to characteristics of blocks adjacent to a lost block, the adaptive error concealment method including: determining one or more thresholds for selecting an error concealment method, from a plurality of error concealment methods, based on one or more of characteristics of blocks adjacent to a current block having an error; generating a temporal activity and a spatial activity of pixels adjacent to the current block; and selecting an error concealment method, from the plurality of error concealment methods, for the current block according to a result obtained by comparing the temporal activity, the one or more thresholds, and the spatial activity. | 2009-01-01 |
20090003462 | Method and apparatus for data synchronization - In one embodiment of the invention, a memory receives unsynchronized data and a processor performs symbol interleaving at a synchronization point located after a beginning of a superframe. | 2009-01-01 |
20090003463 | OUTPUT BUFFER CIRCUIT, SIGNAL TRANSMISSION INTERFACE CIRCUIT AND APPARATUS - An output buffer circuit which transmits a logic signal to a transmission line includes a transmission pre-emphasis output circuit and a transmission pre-emphasis amount determination circuit. The transmission pre-emphasis output circuit controls a pre-emphasis amount according to an output signal from the transmission pre-emphasis amount determination circuit. The transmission pre-emphasis amount determination circuit adjusts a pre-emphasis amount and the number of pre-emphasis taps according to a pseudo loss control signal, controls a pre-emphasis amount of a transmission signal so that a signal amplitude is made smaller in a signal component with a high frequency than that of a signal component with a low frequency, and imparts signal degradation to a received waveform to realize transmission loss in a pseudo manner. | 2009-01-01 |
20090003464 | DIFFERENTIAL TRANSMISSION LINE CONNECTOR - A differential transmission line connector with little unwanted radiation noise is provided. A connector connects a differential transmission pattern for multiple transmission of a group of three differential signals and a differential transmission cable. The differential transmission pattern is provided with three signal lines, and the differential transmission cable also is provided with three signal lines. In a plane that is perpendicular to the longitudinal direction of the differential transmission pattern and the differential transmission cable, the signal lines are positioned at the apexes of an equilateral triangle. The connector is provided with three signal lines that connect, at identical lengths, the signal lines of the differential transmission pattern and the signal lines of the differential transmission cable, between a predetermined first plane of the planes that perpendicularly intersect the longitudinal direction of the differential transmission pattern and a predetermined second plane of the planes that perpendicularly intersect the longitudinal direction of the differential transmission cable. | 2009-01-01 |
20090003465 | Method of Keying for Broadcast Using Ofdm - A method of modulation, which is applied to a communication system transmitting data in one frequency band using at least two orthogonal subcarriers, is disclosed. The present invention includes the steps of adding information bits indicating an amplitude reference and a phase reference to an input bit sequence by a specific time interval unit and carrying out differential amplitude phase shift keying (DAPSK) on the input bit sequence using the amplitude and phase references. The present invention prevents the waste of power and bandwidth due to insertion of a plurality of pilot toes in the related art 1β-QAM system. | 2009-01-01 |
20090003466 | System and Method for Mapping Symbols for Mimo Transmission - Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined. | 2009-01-01 |
20090003467 | POWER PROFILE RESHAPING IN ORTHOONAL FREQUENCY DIVISION MULTIPLE ACCESS SYMBOLS - A method, information processing system, and base station for reshaping power profiles in Orthogonal Frequency Division Multiple Access (OFDMA) symbols. The method includes monitoring a scheduler ( | 2009-01-01 |
20090003468 | SYSTEM AND METHOD TO OPTIMIZE MULTICARRIER COMMUNICATION - A system and method for allocating transmitter power to subcarriers of a multicarrier signal is provided. First, the subcarriers are transmitted with an initial set of power levels and an initial set of constellation assignments. Next, quantized SNR metric values are measured at the receiver for each subcarrier. Following, the measured subcarrier quantized SNR metric is compared with the respective allocated constellation quantized SNR metric, for determining the excess SNR per subcarrier. The transmitter power of the subcarriers whose excess SNR is above a predetermined threshold is adjusted, while keeping the total transmitter power constant. The process may be repeated until a set of predefined expectations is met. The transmitter power may be adjusted for increasing throughput or robustness of the system. For increased accuracy of SNR measurements via BER estimation, several training frames may be used. Advantageously, only constellations equally spaced, such as square or cross constellations, are used. According to a preferred embodiment, OFDM/DMT multicarrier system use IFFT prescalers in the transmitter power adjustment. | 2009-01-01 |
20090003469 | Frequency Offset Correction When Decoding A Packet Encoded In A Frequency Modulated Signal - Frequency offset correction when decoding a packet encoded in a frequency modulated signal. Different symbols encoded in the packet may be corrected by different frequency offsets. In an embodiment, the frequency modulated signal is received on one of the signals of a multi-carrier signal (e.g., based on Orthogonal Frequency Domain Multiplexing, OFDM) and each packet is encoded according to 802.11(a) having the same long sequence repeating multiple times in a header portion. The repetitive sequence is used to compute the different offsets for different symbols. | 2009-01-01 |
20090003470 | OFDM OOB emission suppression at specific frequencies - In general, in one aspect, the disclosure describes an apparatus that includes a radio to provide wireless communications using Orthogonal Frequency Division Multiplexing (OFDM) signaling. A controller is used to determine location of un-modulated carriers in order to suppress out of band (OOB) emissions at a particular frequency. | 2009-01-01 |
20090003471 | OFDM signal acquisition - In general, in one aspect, the disclosure describes a method defining order and means in which physical parameters of a received OFDM signal may be detected. A fractional frequency offset is determined for the OFDM signal and is used to determine a coarse location for received signal preamble. A symbol boundary is determined based on the coarse location and the course location is used to determine preamble location. A preamble sequence and integer frequency offset is determined based on the preamble location. | 2009-01-01 |
20090003472 | METHOD AND APPARATUS FOR COMMUNICATING WITH ROOT-NYQUIST, SELF-TRANSFORM PULSE SHAPES - A communication system ( | 2009-01-01 |
20090003473 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING COMMON CONTROL CHANNELS IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving a common control channel in an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system. In the transmission apparatus, when a plurality of bursts are transmitted during a Transmission Time Interval (TTI) of the common control channel, an Inverse Fast Fourier Transform (IFFT) mapper generates bursts that are shifted in a frequency domain by applying a predetermined cyclic shift offset between the bursts, and maps the generated bursts in a resource block. A transmission unit transmits the bursts to a receiver. In the reception apparatus, a reception unit receives a burst, and a combining unit combines the received burst with a burst stored in a buffer. A decoder decodes each of the combined bursts, and upon a successful decoding, detects a TTI start timing of the common control channel from the successfully decoded burst. | 2009-01-01 |
20090003474 | CONSTANT MODULUS MIMO PRECODING FOR CONSTRAINING TRANSMIT ANTENNA POWER FOR DIFFERENTIAL FEEDBACK - A method and apparatus for constraining power amplifier (PA) imbalance includes using a constant modulus (CM) criterion to ensure PA balance when using differential feedback. | 2009-01-01 |
20090003475 | METHOD AND SYSTEM FOR ADAPTATION BETWEEN DIFFERENT CLOSED-LOOP, OPEN-LOOP AND HYBRID TECHNIQUES FOR MULTIPLE ANTENNA SYSTEMS - Aspects of a method and system for adaptation between different closed loop, open loop and hybrid techniques for multiple antenna systems may include a transmitting station that enables generation of a plurality of signals that are concurrently transmitted via a communication medium based on a selected one of: full feedback information, reduced quantity feedback information, or no feedback information. The selection may be determined at the transmitting station based on a determined Doppler shift frequency. | 2009-01-01 |
20090003476 | METHOD AND APPARATUS FOR DECODING USING COMPLEX LATTICE REDUCTION IN A MULTIPLE ANTENNA SYSTEM - A method and apparatus for Multiple-Input Multiple-Output (MIMO) signal decoding using complex Lattice Reduction (LR) in a multiple antenna system is provided. The method provides MIMO signal decoding with increased operating speed using a transformation of reducing the lattice basis directly to a complex channel matrix that has a smaller size in comparison with a conventional matrix, which decreases the computational complexity of the LR transformation, as well as using a procedure of permutating columns of the channel matrix only twice without binding to the procedure of reducing off-diagonal elements of the matrix R, namely prior and after the procedure of reducing. Moreover, the new method for MIMO signal decoding has its output soft decisions. | 2009-01-01 |
20090003477 | Radio Communication Base Station Apparatus and Report Channel Signal Transmission Band Setting Method - Provided is a base station capable of effectively transmitting BCH data. The base station ( | 2009-01-01 |
20090003478 | Method and Apparatus for Generating and Receiving Ofdm Symbol - The present invention provides an OFDM symbol generating apparatus. The OFDM symbol generating apparatus generates a plurality of weight-applied symbol groups by applying a plurality of weights to a digital modulation symbol group, and generates a plurality of IFFT symbol groups by performing an IFFT operation on the plurality of weight-applied symbol groups. Subsequently, an IFFT symbol group having the minimum PAPR is selected from among the plurality of IFFT symbol groups such that a characteristic of a PAPR can be improved without reducing data transmission speed. | 2009-01-01 |
20090003479 | Method and Device for Estimating Channel of Uplink Signal in Wireless Communication System - Provided are a method and device for estimating a channel in a wireless communication system, and more particularly, a method of estimating a channel of an uplink signal in an orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division multiple access (OFDMA) communication system supporting the Institute of Electrical and Electronics Engineers (IEEE) 802.16d/e standards and a channel estimation device employing the method. The method includes the steps of: extracting pilot symbols included in the received signal and estimating linear phase values using the pilot symbols; interpolating the pilot symbols along a time axis and obtaining first channel responses; interpolating the pilot symbols along a frequency axis according to the first channel responses and obtaining second channel responses; and calculating channel estimation values using the second channel responses and the linear phase values. | 2009-01-01 |
20090003480 | Method And Apparatus For Multi-Antenna Transmitting Based On Spatial-Frequency Encoding - The present disclosure relates to communication technologies and discloses a method and apparatus for multi-antenna transmitting based on spatial-frequency encoding. The method includes: performing spatial-frequency encoding on input data and outputting encoded data; mapping the encoded data to the same sub-carrier of each antenna in an antenna group; adding a phase shift to the encoded data on different sub-carriers of each antenna; OFDM-modulating the phase-shifted encoded data on each antenna; and transmitting the OFDM-modulated data by transmit antennas. | 2009-01-01 |
20090003481 | System, Device and Method - A system or device includes a consumer supplied via a supply line, electrical power and data being transmittable via the supply line, the power signal and the data signal being alternately transmittable. | 2009-01-01 |
20090003482 | BROADBAND SELF ADJUSTING QUADRATURE SIGNAL GENERATOR AND METHOD THEREOF - Low noise phase quadrature signals are generated after receiving a clock signal and adjusting the clock signal in response to a feedback signal to generate a phase adjusted clock signal. The clock signal and the phase adjusted clock signal are exclusive-ored to generate a frequency doubled signal. An in-phase local oscillator signal and a quadrature local oscillator signal are generated from the frequency doubled signal such that the in-phase local oscillator and the quadrature local oscillator signal are out-of-phase with each other. In addition, a phase relationship between the in-phase local oscillator signal and the quadrature local oscillator signal are detected, and the feedback signal is generated based upon the phase relationship between the in-phase local oscillator signal and the quadrature local oscillator signal. | 2009-01-01 |
20090003483 | Detector and Method for Estimating Data Probability in a Multi-Channel Receiver - A detector and method for estimating channel data probability in a multi-user or multiple-input multiple-output communication system includes summing conditional bit probabilities conditioned on hypothetical channel data patterns over stochastically selected hypothetical channel data patterns. Various detailed hardware structures and circuits are also described. | 2009-01-01 |
20090003484 | DEVICE AND METHOD FOR COMMUNICATION USING HYBRID MODULATION - A method and system for modulating a signal includes providing a carrier including periodic waves, peaks of the periodic waves defining a carrier shape of the carrier; changing a plurality of the periodic waves so that peaks of the changed waves form a shaped signal having a signal shape which is different from the carrier shape; and detecting the shaped signal. | 2009-01-01 |
20090003485 | Mimo Transmitting Apparatus And Mimo Transmitting Method - A MIMO transmitting apparatus wherein a low power consumption and a high performance can be achieved by taking the influence of variation in communication distance into account. In this apparatus, a low power consumption design part ( | 2009-01-01 |
20090003486 | APPARATUS AND METHOD FOR MAPPING SYMBOLS TO RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for mapping coded data symbols to resources in a mobile communication system. An S/P converter converts a serial signal including user data or control information into a plurality of parallel signals. A DFT unit performs Discrete Fourier Transform (DFT) on the parallel signals output from the S/P converter. A controller controls the DFT unit so that among the signals output from the S/P converter, a control channel is mapped in the maximum available resources to which the control channel can be mapped, among the resources included in a resource block, and data symbols are mapped to the remaining resources, except for the maximum available resources to which the control channel can be mapped. A subcarrier mapper allocates the signals output from the DFT unit to subcarriers. An RF processor converts a signal output from the subcarrier mapper into a radio signal. | 2009-01-01 |
20090003487 | REDUCING AMPLITUDE MODULATED NOISE FOR A WIRELESS TRANSCEIVER - Mechanisms for reducing amplitude-modulated noise in a wireless transceiver are generally described. In one example, an apparatus includes a radio-frequency identification (RFID) transceiver, a digital-analog converter (DAC) coupled with the transceiver, a reconstruction filter coupled with the digital-analog converter, and hold logic associated with the reconstruction filter to enable the reconstruction filter to hold its output voltage. | 2009-01-01 |
20090003488 | TRANSMITTER AND RECEIVER - There is provided with a transmitter including: a modulator configured to modulate a data bit sequence by alternately using first and second signal point sets to generate a data symbol sequence; a data block generator configured to generate data blocks each including a plurality of data symbols, an addition unit configured to add a guard interval to each data block to generate data blocks with guard intervals; and a controller configured to control modulation by the modulator so that an end data symbol of a first data block with the guard interval and a head data symbol of a second data block with the guard interval generated following the first data block with the guard interval belong to different signal point sets and data symbols in the first and second data blocks with the guard interval alternately belong to the first and second signal point sets. | 2009-01-01 |
20090003489 | Clustered OFDM with channel estimation - An improved OFDM receiver is realized by employing a simplified delay function for the transmissions channel. The simplified delay function yields a simplified frequency-domain correlation that is applied to develop an Eigen matrix U that is used in developing estimates of the channels. Those channel estimates are used in the receiver to develop the output signals. | 2009-01-01 |
20090003490 | Method and system for tracking and determining a location of a wireless transmission - An apparatus for detecting and timing a transmitting device is disclosed. The device includes a receiving system receiving a signal containing at least a preamble code of a known length and at least one pulse within a receive window after the preamble code, a circuit receiving the at least one pulse comprising a zero-crossing circuit for indicting a zero-voltage crossing of the at least one pulse and a trigger device for latching the indication of zero-voltage crossing, and a ripple circuit counter, receiving the latched indication of said zero-voltage crossing and associating a time to the receipt of the latched indication. A system for detecting and locating a transmitting device is further disclosed. The system includes a plurality of sensor apparatus each determining a reception time of a signal and a processor for determining a location based on groups of the reception times | 2009-01-01 |
20090003491 | SYSTEM AND METHOD FOR DC OFFSET COMPENSATION AND BIT SYNCHRONIZATION - A system and method for compensating for DC offset and/or clock drift on a wireless-enabled device is described. One embodiment includes a radio module, an A/D converter connected to the radio module, a DC tracking loop connected to the A/D converter, and a multi-hypothesis bit synchronizer. | 2009-01-01 |
20090003492 | High Data Rate Demodulation System - The demodulation process of a wireless data transmission system using multi-level symbols makes use of templates corresponding to each of the possible symbol transitions, so that knowledge of previously decoded symbols can be use to decode the next one. The weighting and/or timing of individual samples of each symbol is varied in response to the performance of the symbol identification process. | 2009-01-01 |
20090003493 | CORRECTING FOR CARRIER FREQUENCY OFFSET IN MULTI-CARRIER COMMUNICATION SYSTEMS - A multi-carrier (MC) receiver receives a multi-carrier signal containing data symbols as well as pilot symbols. The MC receiver estimates a carrier frequency offset in a downconverted base-band multi-carrier signal in the frequency domain based on deviations of one or more characteristics of the pilot signals from predetermined values, and corrects for the offset in the time domain. In an embodiment, a second order phase locked loop (PLL) estimates the phase of the pilot signals to determine the carrier frequency offset. Changes in pilot phases caused due to the time domain correction are cancelled to allow the PLL to minimize deviations from the lock position. | 2009-01-01 |
20090003494 | RADIO COMMUNICATION SYSTEM AND APPARATUS - A radio communication system for transmitting a radio signal with a transmission format in which a channel response calculation preamble signal serving as a reference upon reception is inserted is disclosed. The output frequency of channel response calculation preamble signals is varied in accordance with a temporal change in radio propagation environment. A channel response variation measurement unit measures a variation of the radio propagation environment. A channel response calculation preamble signal output frequency setting unit sets the output frequency of preamble signals in accordance with the temporal change in radio propagation environment. The preamble signals are inserted in the transmission format to be transmitted at that frequency. | 2009-01-01 |
20090003495 | ENHANCED PILOT SIGNAL RECEIVER - Briefly, in accordance with one embodiment, a method of adjusting for digital automatic gain control (DAGC) quantization error in a mobile station is as follows. A first DAGC value is stored before reception of one or more enhanced pilot signals. A second DAGC value is computed during reception of the one or more enhanced pilot signal. The first DAGC value is restored after reception of the one or more enhanced pilot signals is over. An advantage associated with this particular embodiment may include reduction in quantization error for digital automatic gain control. | 2009-01-01 |
20090003496 | RECEPTION APPARATUS - A reception apparatus is provided with a semiconductor integrated circuit device and a UHF-fixed band-pass filter provided in a stage preceding the semiconductor integrated circuit device. The semiconductor integrated circuit device includes a frequency converter, a to-be-frequency-converted-signal transmission line through which a to-be-frequency-converted signal is fed to the frequency converter, a local-oscillation-signal transmission line through which a local oscillation signal is fed to the frequency converter and an unnecessary-signal attenuation circuit, provided in the to-be-frequency-converted-signal transmission line, that attenuates an unnecessary signal included in signals transmitted through the to-be-frequency-converted-signal transmission line. | 2009-01-01 |
20090003497 | Digital signal processing device, digital signal processing method, and digital signal processing program - The present invention provides a digital signal processing device that considerably reduces a return noise generated in a processing result signal in specific signal processing without wastefully increasing the processing load. There is provided a digital signal processing device that executes specific signal processing under which a return noise is generated in a processing result signal which includes an up-sampling processing unit that performs the up-sampling processing for a digital signal with a predetermined up-sampling rate to generate an up-sampling signal, a specific signal processing unit that performs the specific signal processing for the up-sampling signal generated by the up-sampling processing unit to generate the processing result signal, and a down-sampling processing unit that performs the down-sampling processing for the processing result signal generated by the specific signal processing unit with a predetermined down-sampling rate to generate a down-sampling signal. | 2009-01-01 |
20090003498 | System and method for receiving and combining multiple antenna signals - A receiver system and method of receiving signals is provided. The receiver system includes a plurality of antennas that receive signals and are proximate to one another, a plurality of tuners, a signal combiner, and a symbol timing combiner. The plurality of tuners are in communication with the plurality of antennas. The signal combiner is in communication with the plurality of tuners, and combines an output of each of the plurality of tuners. The symbol timing combiner is in communication with the signal combiner and the plurality of tuners, wherein an output of the signal combiner and outputs from each of the tuners are received by the symbol timing combiner, and the symbol timing combiner emits a combined symbol timing output that is received by each of the tuners. The plurality of tuners process the signals communicated from the plurality of antennas based upon the combined symbol timing output. | 2009-01-01 |
20090003499 | METHOD AND APPARATUS FOR DE-MAPPING SYMBOL IN MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEM - A method and an apparatus for de-mapping symbols in a Multi-Input Multi-Output (MIMO) system are provided. In the present invention, an estimated channel effect and a plurality of received data symbols are used to estimate a plurality of transmitted data symbols. A plurality of constellation points around an estimated value are selected as the detected values of the transmitted data symbol after the estimated value of one of the transmitted data symbols is calculated. Then, the detected values are used to calculate the detected values of remaining transmitted data symbols separately so as to obtain a plurality of detected value sets. Finally, a best one among the detected value sets is chosen as a result of de-mapping the received symbols. Therefore, only a few detected value sets are calculated and a better detected result is obtained, which possesses low complexity and high performance. | 2009-01-01 |
20090003500 | CIRCUIT FOR OUTPUTTING DATA OF SEMICONDUCTOR MEMORY APPARATUS - A data output circuit of a semiconductor memory apparatus can include a clock synchronization unit (which is driven by a power supply voltage) that can be configured to receive data and output first synchronization data and second synchronization data in synchronization with a clock; a voltage converting unit that can be configured to convert the first and second synchronization data, which can swing between the power supply voltage and a ground voltage, into first and second converted data, which can swing between an I/O power supply voltage and the ground voltage; and a data output driver, which is driven by the I/O power supply voltage, for outputting the first converted data and the second converted data as output data. | 2009-01-01 |
20090003501 | Offset Error Mitigation in a Phase-Locked Loop Circuit with a Digital Loop Filter - A phase-locked loop circuit comprises an analog section, a digital section and a digital offset mitigation circuit. The analog section is subject to offset error and comprises an analog phase comparator and an analog-to-digital converter. The digital section comprises a digital loop filter and a digitally-controlled frequency-generating circuit. The digital loop filter is connected to receive a digital difference signal from the analog-to-digital converter. The digital offset mitigation circuit is operable in response to the digital difference signal to mitigate the offset error of the analog section. | 2009-01-01 |
20090003502 | Bit pattern synchronization in acquired waveforms - A waveform processing system performs operations that may include identifying a location of a specified bit pattern within a coherently sampled repeating pattern input signal. In some examples, multiple periods of a repeating pattern signal are acquired using coherent sampling techniques such as, for example, coherent interleaved sampling (CIS). In such examples, the sampled waveform may be converted to a binary pattern that can be searched to locate a match to a predetermined or user-specified bit pattern. In one illustrative example, the identified location may be used to display the sampled waveform. In another example, the identified location may be used to measure pattern-dependent jitter of the sampled waveform. | 2009-01-01 |
20090003503 | Frequency detector for VCO band selection - In general, in one aspect, the disclosure describes an apparatus including a multi-band voltage controlled oscillator (VCO), a phase lock loop (PLL) reference clock to track a specific time frame, and an auto band selector (ABS) to count number of VCO output clock periods that occur during the specific time frame for different bands and to select an appropriate band to provide a desired frequency output based on counter results. | 2009-01-01 |
20090003504 | Method for frequency compensation in timing recovery - A method of digitally controlling a timing recovery loop to control jitter and reduce word-length in a recovered clock is provided. A timing error detector provides an output identifying the error sign. First and second randomizing digital attenuators provide first and second estimates of the phase error in a timing signal. A controller receives the first estimate and provides a signal to an NCO. An output from the NCO provides feedback to the error detector to complete a first order feedback loop, providing a first estimate phase error compensation. An integrator receives the second estimate and provides an output estimate for frequency offset of the timing signal that is received by the controller and the sign and magnitude of the integrated phase error are calibrated to provide a frequency offset. The controller determines a number of additional updates to the NCO required to minimize jitter and reduce word-length. | 2009-01-01 |
20090003505 | Apparatus and Method for Processing Oscillation Signals in Wireless Communication System Based Tdd - The present invention is an oscillating apparatus and a method for Time Division Duplex (TDD) in a wireless communication system. In a Phase-Locked Loop (PLL) synthesizer applied to the wireless communication system, an oscillation signal generating from a PLL circuit is output by way of an isolation unit in which a capacitor for Direct Current (DC) blocking and a predetermined isolator are combined to form one body. Hence, the oscillation signal isolated from a subsequent circuit through the isolation unit is not affected by the effect of switching noises that flow from a Radio Frequency (RF) switch or into a power amplifier of a transmitter during switching between each Down Link (DL) frame and each Up Link (UL) frame, and therefore the performance of a system can be improved. | 2009-01-01 |