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BANDWIDTH REDUCTION OR EXPANSION

Subclass of:

375 - Pulse or digital communications

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Class / Patent application numberDescriptionNumber of patent applications / Date published
375240010 Television or motion video signal 6315
375241000 Pulse code modulation 23
Entries
DocumentTitleDate
20100104001RECEIVER AND RECEIVING METHOD FOR SCALABLE BANDWITH - Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.04-29-2010
20080260020Method and Apparatus for Signal Processing and Encoding and Decoding Method, and Apparatus Therefor - An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes a payload part having at least one of data coding information including pilot coding information per a frame and entropy coding information and a header part having main configuration information for the payload part.10-23-2008
20110194598Methods, Apparatuses and System for Encoding and Decoding Signal - Methods and apparatuses for encoding a signal and decoding a signal and a system for encoding and decoding are provided. The method for encoding a signal includes performing a classification decision process on high frequency signals of input signals, adaptively encoding the high frequency signals according to the result of the classification decision process, and outputting a bitstream including codes of low frequency signals of the input signals, adaptive codes of the high frequency signals, and the result of the classification decision process. The classification decision process is performed on the high frequency signals, and adaptive encoding or adaptive decoding is performed according to the result of the classification decision process, so the quality of voice and audio output signals is improved.08-11-2011
20080317114Reciprocal Index Lookup for BTSC Compatible Coefficients - An algorithm calculates spectral compression/expansion filter coefficients using a value proportional to a reciprocal of a feedback/feedforward signal and stores the coefficients to a lookup table. The lookup table is indexed by a pre selected set of coefficient bits to generate a filter coefficient function. A first portion of the lookup table stores a plurality of discrete values at index points of a line segment corresponding to a filter coefficient function approximation, so as to generate an initial discrete value corresponding to the filter coefficient function at a value of the high order bits and a second portion stores a plurality of slope values, which indicates a slope of the filter coefficient function. A linear circuit interpolates/decimates an approximation of the compression/expansion filter coefficient function based on the slope value, the initial discrete value and a preselected set of low order bits of the reciprocal value.12-25-2008
20120177100DATA PUNCTURING ENSURING ORTHOGONALITY WITHIN COMMUNICATION SYSTEMS - Data puncturing ensuring orthogonality within communication systems. Puncturing is employed within communication systems to ensure orthogonality (or substantial orthogonality) of various transmissions between communication devices within communication systems. Any of a variety of types of signals can be employed herein including uncoded signals, turbo encoded signals, turbo trellis coded modulation (TTCM) encoded signals, LDPC (Low Density Parity Check) encoded signals, and RS (Reed-Solomon) encoded signals, among just some types of signals. A first transmission can be made from a first communication device to a second communication device, and the second communication device can sometimes request a subsequent transmission (e.g., a re-transmission) from the first communication device to the second communication device. Oftentimes, different information is sent from the first communication device to the second communication device within the subsequent transmission. Herein, each of these transmissions can be ensured to be orthogonal.07-12-2012
20100158097DYNAMICALLY SCALED MESSAGING CONTENT - The claimed subject matter provides for systems, devices, and methods facilitating dynamic scaling of messaging content. Messaging content can include visual content other than the actual textual content of a message body for a messaging environment. In an aspect dynamic scaling of messaging content can allow message content such as pictures, images, emoticons, movies, maps, and the like to be presented to a user in a manner that facilities efficient comprehension of the message content. The tokens can be dynamically scaled as the messaging environment changes to maintain high levels of comprehension.06-24-2010
20100098151Method and Apparatus for Cached Adaptive Transforms for Compressing Data Streams, Computing Similarity, and Recognizing Patterns - A method and apparatus for cached adaptive transforms for compressing data streams, computing similarity, and recognizing patterns have been disclosed.04-22-2010
20090154545BANDWIDTH SENSITIVE DATA COMPRESSION AND DECOMPRESSION - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when, e.g., a bottleneck occurs so as to increase the throughput and eliminate the bottleneck.06-18-2009
20100091834SYSTEMS AND METHODS FOR TELESCOPIC DATA COMPRESSION IN SENSOR NETWORKS - Systems and methods for telescopic data compression in sensor networks are disclosed herein. An exemplary method of the disclosed subject matter for telescopically compressing data received from a plurality of sensors in a network adapted to detect a field includes broadcasting a first set of sampling positions to sensors, forming a first set of clusters of sensors based on the sampling positions, receiving data from the sensors contained within the clusters, performing local interpolation of the received data, reconstructing a representation of the field using the interpolated data, and determining areas of interest based on the reconstructed representation of the field.04-15-2010
20130051451Device and Method For Processing Digital Images Captured by a Binary Image Sensor - A method for processing image data comprises determining a set of parameters based on a binary digital image) such that said set of parameters comprises information about the density of white and/or black pixels of a first group of pixels of said binary digital image), and information about the density of white and/or black pixels of a second group of pixels of said binary digital image.02-28-2013
20090316774METHOD AND APPARATUS FOR MULTI-PART INTERACTIVE COMPRESSION - In order to increase the compression of data being transmitted between two devices in communication, the data may be broken up into individual components and individually compressed using different compression state information. The method of multi-part interactive compression comprises the steps of retrieving a request for data from a communicating party; retrieving the data; parsing the data into components according to the content of the data; and compressing each of the components using compression state information.12-24-2009
20090304067System and method for effectively transferring electronic information - A system and method for effectively transferring electronic information includes a transmitter with an encoder that performs a parity encoding procedure. The encoder creates parity blocks for embedding in transmission packets. The parity blocks may be based upon data segments from one or more of the transmission packets. The system also includes a receiver with a decoder that utilizes the parity blocks for performing a packet validation procedure to identify corrupted packets from among the transmission packets. The decoder also performs a packet reconstruction procedure with selected ones of the data segments and the parity blocks to produce reconstructed data segments for the corrupted packets.12-10-2009
20090041109Compact floating point delta encoding for complex data - A method and apparatus for compression of complex data signals within a telecommunications base station. The method includes representing a sample of a complex value discrete time signal using 2(L−N)−S mantissa bits and 2N+S exponent bits to realize peak output signal to noise ratios over a wider dynamic range compared to a conventional L-bit uniform quantization format. The increases in dynamic range and peak output SNR is achieved without increasing the average number of data bits per sample and with relatively simple computational effort.02-12-2009
20090041111 SPECTRAL TRANSLATION/FOLDING IN THE SUBBAND DOMAIN - The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computational complexity. This is accomplished by means of frequency translation or folding in the subband domain, preferably integrated with spectral envelope adjustment in the same domain. The concept of dissonance guard-band filtering is further presented. The proposed invention offers a low-complexity, intermediate quality HFR method useful in speech and natural audio coding applications.02-12-2009
20130070837METHOD FOR DATA TRANSMISSION TO AN ELECTRONIC CONTROL UNIT - A method for data transmission from a programming device to a control unit, the data being compressed by Huffman coding and transmitted with a Huffman coding tree for decoding from the programming device to the control unit, are decompressed and stored in the control unit, by performing, for a predetermined number of data words of N-bits, a first Huffman coding with a first coding tree; performing, for the remaining data words consisting of M-bits, a second Huffman coding with a second coding tree, N greater than M, the predetermined number of data words of N-bits and the remaining data words of M-bits consisting of more than two data words, generating coding trees for the N-bit and the M-bit data words, and transmitting them to the control unit, and providing all coded N-bit data words and N/M of successive M-bit data words with a preceding code bit.03-21-2013
20110013690Signal Block Sequence Processing Method And Signal Block Sequence Processing Apparatus - The present invention provides a signal block sequence processing method. According to the method, signal block headers (Bch, Bdh) are deleted from each sequence of signal blocks (B) each composed of the signal block header indicating whether a signal block payload is a control block payload (Bc′) containing a control code is contained or a data block payload (Bd′) containing data is contained. The resultant signal blocks are formed into one group (G). Each control block payload in the group is provided with position determination information indicating the position of the control block payload in the group. The signal block payloads are rearranged in accordance with a signal block payload rearrangement rule. The rearranged signal block payloads are contained in a super-block payload (Sc), to which a super-block header (Shc) indicative of containment of control block payloads is added. The resultant super-block (S) is output.01-20-2011
20090290631METHODS AND APPARATUS FOR REDUCING MODULATION SIGNAL BANDWIDTH IN POLAR MODULATION TRANSMITTERS - Methods and apparatus for reducing the bandwidth of modulation signals in a phase path of a polar modulation transmitter. An exemplary method includes generating a phase difference modulation signal for a phase path of a polar modulation transmitter, and filtering the phase difference modulation signal using a linear-phase filter. Filtering the phase difference modulation signal may be performed by first detecting samples in the phase difference modulation signal that have phase difference values in excess of a phase difference threshold and then filtering samples in the vicinity of the threshold-violating samples to remove the threshold-violating events. Alternatively, all samples may be filtered, i.e., without regard as to whether any given sample exceeds a phase difference threshold, to remove large phase difference changes in the phase difference modulation signal, or a combination of linear-phase and nonlinear filters may be used to remove the large phase difference changes.11-26-2009
20090016426ENCODER, DECODER, AND THEIR METHODS - An encoder generating a decoded signal with an improved quality by scalable encoding by canceling the characteristic inherent to the encoder and causing degradation of quality of the decoded signal. In the encoder, a first encoding section (01-15-2009
20110007795COMPRESSED SENSING CHARACTERIZATION SYSTEM AND METHOD - A system for characterizing a compressed sensing apparatus is described which broadly includes a random vector generator for generating an input vector, a waveform generator in communication with the random vector generator for converting the input vector into an analog signal, a compressed sensing apparatus in communication with the digital-to-analog converter for determining a digital bit stream from the analog signal, a serial-to-parallel converter for converting the digital bit stream into an input vector; and an electronic processor in communication with the random number generator and the serial-to-parallel converter configured for determining a compressed sensing matrix.01-13-2011
20100014576BAND EXTENDING APPARATUS AND METHOD - A band extending apparatus (01-21-2010
20090201984BANDWIDTH ASYMMETRIC COMMUNICATION SYSTEM - The present invention relates to a bandwidth asymmetric communication system comprising at least one terminal having an uplink transmission unit (08-13-2009
20080232456ENCODING APPARATUS, ENCODING METHOD, AND COMPUTER READABLE STORAGE MEDIUM STORING PROGRAM THEREOF - An encoding apparatus holds predetermined encoding conditions (sets of a sampling frequency and a bit rate) associated with predetermined ranges having consecutive possible amounts of free space in the storage 09-25-2008
20090290632COMPRESSION OF SIGNALS IN BASE TRANSCEIVER SYSTEMS - A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses signal samples resulting from analog to digital conversion of an analog signal received via an antenna. The RF unit transfers the compressed signal samples over the serial data link to the base station processor where they are decompressed prior to the normal signal processing operations. For the downlink, the base station processor compresses signal samples and transfers the compressed signal samples over the serial data link to the RF unit. The RF unit decompresses the compressed samples and converts the decompressed samples to an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems.11-26-2009
20090046775System And Method For Delivery Of Electronic Data - System and method for compressing data with the use of an Adaptive Progression Pattern and/or Logical Frequency Lexicon. The system and method may also comprise a adaptive learning scheme to update the Adaptive Progression Pattern and/or Logical Frequency Lexicon.02-19-2009
20100284455ENCODING DEVICE, DECODING DEVICE, AND METHOD THEREOF - Provided is an encoding device which divides an input signal into a low-range component and a high-range component and encodes the components in separate encoding units. The encoding device can improve quality of a decoded signal. The encoding device (11-11-2010
20110134990QUANTIZATION SPLITTING MULTIPLE DESCRIPTION ENCODER - An improved (N:K) multiple description binning encoder that employs binning yet permits recovery of the input signal when fewer than K of the descriptions are available. This is achieved by quantization splitting a chosen number of descriptions.06-09-2011
20120106620Method for transmitting numeric values from a detection unit to a control unit - A method for transmission of numeric values from a detection unit to a control unit including the steps of: applying to the numeric value considered at least one first and second coding algorithm to obtain a first and second code (NUM-BIT) in binary formats; storing the first and second codes, and the acquisition instant corresponding to the value considered; generating first and second code sequences formed by the first and second stored codes; selecting an optimal algorithm on the basis of the first and second code sequences; generating a sequence of data on the basis of the first or second code sequence, and the selected algorithm; and transmitting the sequence of data.05-03-2012
20110268174PACKAGE OUTPUT METHOD AND DEVICE FOR ARITHMETIC CODING - A method and a device for arithmetic code package outputting. The method comprises: acquiring the 7-bit output string of the upper bits according to the CodLow value, i.e., the starting position of the probability space to be updated, and using the 7-bit ID string to identify the output characters with undetermined state in the 7-bit output string; acquiring the number of valid bits according to the CodRange value, i.e., the length of the probability space to be updated, wherein the number of valid bits indicates the number of valid bits of output characters in the 7-bit output string according to the CodLow value to be updated; extracting the valid output characters in the 7-bit output string according to the number of valid bits, identifying the output characters with undetermined state among the extracted valid output characters according to the 7-bit ID string; and processing the extracted valid output characters, acquiring and outputting the coding output bytes.11-03-2011
20090279598METHOD, APPARATUS, AND PROGRAM FOR ENCODING DIGITAL SIGNAL, AND METHOD, APPARATUS, AND PROGRAM FOR DECODING DIGITAL SIGNAL - A down sampler 11-12-2009
20090103601Methods for Soft Bit Companding for Time De-interleaving of Digital Signals - This invention provides methods for reducing the bit width of soft information, while maintaining a large dynamic range by applying compression and expansion. In particular, this invention provides methods for time de-interleaving of soft information, comprising the steps of: quantizing the soft information into a first soft information having a first pre-defined number of bits; compressing the first soft information into a second soft information having a second pre-defined number of bits; time de-interleaving the second soft information; and decompressing the time de-interleaved second soft information.04-23-2009
20090041110RATE MATCHING WITH MULTIPLE CODE BLOCK SIZES - Bits included in each code block of a transport block can be stored to an associated circular buffer and transmitted over a channel. Each circular buffer can vary in size in proportion to a size of the associated code block. Therefore, since in certain operating environments code blocks for a transport block can vary in size, circular buffers can vary in size as well. Accordingly, when not all data from a transport block and/or an array of circular buffers can be transmitted over the channel, each circular buffer from the array can transmit a portion of bits that is proportional to a size of the respective circular buffer (or the associated code block or encoded code block). Furthermore, the number of bits transmitted from each circular buffer can be constrained by an aggregate budget for all circular buffers and can be further constrained to be an integer multiple of a modulation order for the transport block.02-12-2009
20090052520TRANSPORT STREAM GENERATING DEVICE, TRANSMITTING DEVICE, RECEIVING DEVICE, AND A DIGITAL BROADCAST SYSTEM HAVING THE SAME, AND METHOD THEREOF - A transport stream (TS) generating apparatus, a transmitting apparatus, a receiving apparatus, a digital broadcast system having the above, and a method thereof are provided. The digital broadcast system includes a transport stream (TS) generating apparatus which generates a multi transport stream (TS) by multiplexing a normal stream and a turbo stream having a variable coding rate, a transmitting apparatus which re-constructs the multi TS by processing the turbo stream, and transmits the re-constructed multi TS, and a receiving apparatus which receives the re-constructed multi TS, and decodes the normal stream and the turbo stream respectively, to recover normal data and turbo data. Accordingly, a multi TS, which includes normal stream and a turbo stream of various coding rates, can be transmitted and received efficiently.02-26-2009
20080291993METHOD FOR JOINT SCALAR QUANTIZATION AND A METHOD FOR ADAPTIVELY ADJUSTING SCALAR QUANTIZATION LEVEL - A method for joint scalar quantization is disclosed, characterized in that, transforming the original variables into intermediate variables according to a special transforming relationship; according to the variance of the intermediate variables, quantizing, feedbacking and transmitting the intermediate variables; when the original variables are needed, transforming the intermediate variables into the original variables according to the special transforming relationship. Two schemes about the intermediate variables quantization are also provided to adapt to the different system requirements. Further, based on the joint scalar quantization schemes said above, two methods for adaptively adjusting scalar quantization level according to the interrelation among signals are provided.11-27-2008
20080240227Bitstream processing using marker codes with offset values - A sequence of data within a bitstream may be determined. An offset value corresponding to a location of a validity code within the bitstream may be determined, relative to the sequence of data. A marker code and the offset value may be inserted into the bitstream in association with the sequence of data. Also, a received bitstream may be scanned to determine a potential marker code, a potential offset value may be determined, based on the potential marker code. A validity code within the bitstream may be determined, based on the potential offset value, and a validity of the potential marker code may be determined, based on the validity code.10-02-2008
20080240226RECORD COMPRESSION USING INCREMENTAL REVERSE TEMPLATING - In one embodiment, a method for compression is disclosed, including receiving source data, creating at least one template based upon common data, and creating a compressed record including a reference to the at least one template and a template delta that represents a difference between the at least one template and source data.10-02-2008
20090141790SCALABLE DECODER AND DISAPPEARED DATA INTERPOLATING METHOD - A scalable decoder capable of preventing degradation of the quality of the decoded signal in a disappeared data interpolation in band scalable coding. A core layer decoding section (06-04-2009
20110222596COMPRESSION DICTIONARY SYNCHRONIZATION METHOD AND DEVICE - A compression dictionary synchronization method and device are provided. The method includes: obtaining a synchronization information field of a dictionary entry in a compression dictionary corresponding to data to be sent; judging, according to the synchronization information field, whether a network device at a receiving side has the dictionary entry; and synchronizing the dictionary entry with the network device at the receiving side if the network device at the receiving side does not have the dictionary entry, so that after receiving the data which is to be sent and is compressed by data redundancy elimination according to the dictionary entry, the network device at the receiving side can decompress the compressed data to be sent according to the dictionary entry. Data redundancy is decreased by reducing useless dictionary entry synchronization between devices.09-15-2011
20090052519Method of Processing a Signal and Apparatus for Processing a Signal - A method and apparatus for signal processing which enable data compression and recovery with high transmission efficiency are disclosed. Data coding and entropy coding are performed with correlation and grouping is used to increase coding efficiency. A method for signal processing according to this invention, the method includes decapsulating the signal received over an Internet protocol network, obtaining data coding identification information from the de-capsulated signal and data-decoding data according to a data coding scheme indicated by the data coding identification information, wherein the data coding scheme includes at least a pilot coding scheme, the pilot coding scheme decodes the data using a pilot reference value corresponding to a plurality of data and a pilot difference value, and the pilot difference value is generated using the data and the pilot reference value.02-26-2009
20090052518MOBILE RADIO COMMUNICATION DEVICE AND CHANNEL ESTIMATE CALCULATION METHOD - This mobile radio communication device comprises pilot symbol number determination unit 02-26-2009
20090201983METHOD AND APPARATUS FOR ESTIMATING HIGH-BAND ENERGY IN A BANDWIDTH EXTENSION SYSTEM08-13-2009
20090097542SIGNAL CODING AND DECODING WITH PRE- AND POST-PROCESSING - In a data compression, a pre-processing is applied to a signal before it is encoded and a post-processing is applied to a signal after it is decoded. A pre-processor for signals to be encoded includes a filtering device for filtering a signal with one or more filters and a providing device for providing information about the filtering process. A post-processor for previously filtered, encoded and decoded signals includes an information retrieving device for retrieving information about the filtering process and an inverse filtering device for inverse filtering the decoded signal based on the retrieved information.04-16-2009
20100014577METHOD AND APPARATUS FOR FAST NEAREST NEIGHBOR SEARCH FOR VECTOR QUANTIZERS - A method comprises identifying a component k of a codevector from a codebook C having one or more codevectors, the component k introducing highest variance for an input vector; allowing ordering of codevectors in the codebook C; and searching for a best match vector for the input vector using ordered codevectors.01-21-2010
20100150222QUANTUM BASED INFORMATION TRANSMISSION SYSTEM AND METHOD - A method and system of data transmission; the method comprising: converting data into qubits; transmitting a first qubit; measuring the first qubit at receiver location; determining whether or not to transmit portions of data from a sequential successive qubit based upon the value of the first qubit measured at the receiver location. The system comprising a sender and at least one receiver, the sender comprising: a converter for converting data into qubits; a modulator for modulating a signal based upon the values of the qubits; a transmitter for transmitting the modulated signal to at least one receiver; the at least one receiver comprising: a detector for measuring the value of at least one qubit; a feedback circuit for transmitting the measured value of the at least one qubit to the sender; whereby the transmission of data for each successive qubit is based upon the value measured for the preceding qubit and the sender utilizes only the data for each successive qubits which correlates to the measured value of the preceding qubit.06-17-2010
20100183067POST-PROCESSING FOR REDUCING QUANTIZATION NOISE OF AN ENCODER DURING DECODING - The invention relates to the processing of a signal that is compression encoded (COD) according to a predetermined encoding type applying a quantification operation (Q) and then decoded (DEC) so that the quantification noise is present in the decoded signal (S*). The signal processing of the invention comprises applying a quantification noise reduction (TBQ) to the decoded signal (S), preferably in the following manner: first obtaining information (INF) on the type of compression encoding, selecting a model for the reduction of the quantification noise adapted to said information by estimating the quantification noise (BQ) that the encoding may have generated; and applying to the decoded signal (S*) a processing for reducing the quantification noise (FIL) according to the selected model.07-22-2010
20080267281METHOD, DEVICE AND NETWORK ELEMENT FOR DECODING AN INFORMATION WORD FROM A CODED WORD - It is disclosed a method for decoding an information word from a set of coded words. The method comprises the steps of receiving a coded word, of selecting a coded word having the minimum distance from the received coded word from a pre-configured sub-set of the set of the coded words, wherein the sub-set is configured to at least two coded words having each other a distance higher than the minimum distance between the coded words of the set, and of decoding the information word from the selected coded word.10-30-2008
20090074051Method and apparatus for wireless transmission of high data rate streams - Methods, system and devices for wireless transmission of HDMI data streams. Plurality of data multiplex converters are constructed and used in parallel to process one HDMI datastream into plurality of channels of data packets wherein the plurality of channels of data packets are transmitted through Wi-Fi wireless protocols to a destination device. The received plurality of channels of data packets are reassembled into one data stream for display or play.03-19-2009
20110026581Scalable Coding with Partial Eror Protection - An encoder for encoding an audio signal, wherein the encoder comprises: a first encoder configured to receive an first signal and generate a second signal dependent on the first signal; a second encoder configured to generate a third signal dependent on the second signal and the first signal; a signal processor configured to partition the third signal into at least two parts; and a multiplexer configured to receive the at least two parts of the third signal and the second signal and combine the said signals to output an encoded signal.02-03-2011
20120134408CODING METHOD, DECODING METHOD, CODING APPARATUS, AND DECODING APPARATUS - A coding method comprises: transforming an input signal; scanning and quantizing coefficient values composing the transformed output signal; and entropy coding the quantized coefficients, wherein the transforming includes: generating a first transformed output signal by performing a first transform on the input signal using a first transform coefficient; and generating a second transformed output signal by performing, using a second transform coefficient, a second transform on a first partial signal which is a part of the first transformed output signal, and outputting the transformed output signal including the generated second transformed output signal and a second partial signal that is the remaining part of the first transformed output signal other than the first partial signal, and a signal corresponding to the second transformed output signal and a signal corresponding to the second partial signal are processed differently in at least one of the scanning, the quantizing, and the entropy coding.05-31-2012
20090003429Apparatus 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.01-01-2009
20090141791SYSTEM AND METHOD FOR HUFFMAN SHAPING IN A DATA COMMUNICATION SYSTEM - In a communication system, Huffman coding techniques are used to obtain shaping gains for an improvement in data transmission rates. More particularly, a novel method of Huffman shaping is described that achieves a shaping gain of greater than 1 dB. The shaping gain results in a higher data rate transmission in a communication system where transmitted power is constrained.06-04-2009
20080317113System and Method for Run-Time Reconfiguration - A reconfigurable digital signal processing system includes a serial to parallel converter having at least one delay block and at least one decimation block arranged to convert a first serial signal with a first sampling rate to a multiplicity of parallel subband signals with a second sampling rate. The second sampling rate is less than or equal to the first sampling rate. Processing blocks are arranged to process the subband signals to produce processed signals. A configuration controller is arranged to modify the decimation factor of each decimation block and to load a configuration into the memory of a processing block. A parallel to serial converter comprising at least one expansion block, the parallel to serial converter is arranged to recover from the processed signals a second serial signal with a sampling rate substantially equal to the first sampling rate.12-25-2008
20080253441Method and Apparatus for Signal Processing and Encoding and Decoding Method, and Apparatus Therefor - An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining a first partial parameter using a reference value corresponding to the first partial parameter and a difference value corresponding to the reference value and deciding a parameter using the first partial parameter and a second partial parameter.10-16-2008
20080205505VIDEO CODING WITH MOTION VECTORS DETERMINED BY DECODER - A method, system, and apparatus for video coding in regards to motion data, particularly with vectors determined by a decoder are disclosed. A method of video decoding where part of a reference image frame is compared with a portion of the image frame to be compensated and the comparison allows for determination of a motion vector. An encoder which provides to a decoder in the form of a data bitstream, a portion of an image frame, allowing the decoder to determine a motion. A decoder which be determining motion vectors produces at least some of an image frame. A system for video coding having both an encoder and a decoder.08-28-2008
20080205506METHOD FOR DETERMINING THE LIKELIHOOD OF A MATCH BETWEEN SOURCE DATA AND REFERENCE DATA - A method for reducing data in the form of successive groups of N values may comprise finding the largest X values of the N values of each group, setting all but the largest X values of each group equal to zero, averaging W respective ones of the N values to produce N average values, finding the largest Y of the N average values, where Y is less than X, and setting the largest Y of the N average values equal to a first binary value, and a reminder of the N average values equal to a second binary value.08-28-2008
20100215092Method and Apparatus for Multiple Description Coding - The present invention relates to a method and apparatus to be used in designing an index assignment matrix for use in multiple description coding of an information signal. The bandwidth of the index assignment matrix is selected in dependence of transmission condition information relating to a transmission condition of a communication channel onto which a description of the information signal can be transmitted.08-26-2010
20100166052ENCODER, DECODER, ENCODING METHOD AND DECODING METHOD, AND RECORDING MEDIUM - An encoder includes a separation unit separating image data into a plurality of data blocks, a variable length encoding unit variable-length-encoding the data blocks separated by the separation unit so as to generate variable length code sequences, a code block generating unit generating code blocks variable-length-decoded in parallel from a start end and a termination end by combining two variable length code sequences generated by the variable length encoding unit, and a bit stream generating unit generating a bit stream such that a boundary between the code blocks is recognized.07-01-2010
20110164672Orthogonal Multiple Description Coding - In one aspect, an orthogonal multiple description encoder comprises orthogonal multiple description generation circuitry configured to produce multiple descriptions of a given signal by processing the signal using respective ones of a plurality of orthogonal matrices. Each of the multiple descriptions is generated as a function of the signal and a corresponding one of the plurality of orthogonal matrices. Other aspects include an orthogonal multiple description decoder, orthogonal multiple description encoding and decoding methods, and associated computer program products.07-07-2011
20110019729CODING - Coding is provided in which a multi-media object is coded to obtain a bit-stream, and quality information is added to the bit-stream, which quality information indicates a quality of the object in relation to a given position in (or a given part of) the bit-stream. By adding quality information to the bit-stream, jointly storing or transmitting multiple coded objects can be optimized in that the quality of the object can be easily taken into account.01-27-2011
20110305272ENCODING METHOD, DECODING METHOD, ENCODING DEVICE, DECODING DEVICE, PROGRAM, AND RECORDING MEDIUM - To improve the encoding compressibility of prediction residuals. An encoder performs prediction analysis of input time-series signals to generate prediction residuals expressed by integers, and sets an integer separation parameter that depends on the amplitude of the prediction residuals for each certain time segment. The encoder selects a side information code table corresponding to an index representing the prediction effectiveness of the time-series signals from a set of side information code tables including a side information code table used for variable length coding of side information corresponding to the separation parameter. A decoder selects a side information code table corresponding to the index representing the prediction effectiveness of the time-series signals from a set of side information code tables including a side information code table used for decoding of a code corresponding to the side information corresponding to the integer separation parameter corresponding to the magnitude of the prediction residuals.12-15-2011
20080232457BANDWIDTH SENSITIVE DATA COMPRESSION AND DECOMPRESSION - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when, e.g., a bottleneck occurs so as to increase the throughput and eliminate the bottleneck.09-25-2008
20110158307Asymmetric dictionary-based compression/decompression useful for broadcast or multicast unidirectional communication channels - An asymmetric approach for compressing digital data, or digitized analog data, uses dictionary-based compression for a transmitter and receiver communicating over a lossy unidirectional communication channel. The transmitter is responsible for generating active dictionaries, selecting appropriate dictionaries for compressing data, retiring old dictionaries, and sending new dictionaries to the receiver. The receiver passively stores the dictionaries from the transmitter and uses the right stored dictionary to decompress data received from the transmitter, as indicated by instructions in the compressed data set.06-30-2011
20120207206Method And Apparatus For Signal Compression And Decompression - In one embodiment, the method of compressing a digital signal includes reducing redundancies in the digital signal, scaling a block of samples output from the reducing step by a scaling factor, and quantizing the scaled samples to produce compressed samples. The digital signal being compressed may be a digital radio frequency signal.08-16-2012
20090129461Compression Code for Transferring Rate Matched Data Between Devices - A block of N-bit symbols is compressed to reduce transfer bandwidth between two devices. A plurality of locations within the block of N-bit symbols is identified in which a same known N-bit symbol is to be located. The known symbol in each of the plurality of locations is replaced with a substitute 1-bit symbol having a first value. Each remaining symbol in the block of N-bit symbols is marked with a marker bit having a second value. The compressed block of marked N-bit symbols and substitute symbols is transmitted from one device to another device and then decompressed by replacing the substitute symbols with known symbols and removing the markers to restore the original block.05-21-2009
20120155531HYBRID CODEC APPARATUS AND METHOD FOR DATA TRASNFERRING - In a hybrid codec apparatus for data broadcasting, an encoder divides a source file into N sections, generates N principal encoded data after coding on a first finite field and k additional encoded data after coding on a second finite field, then transmits a group of coefficient encoded data and the N+k encoded data to a decoder. The decoder merges the group of coefficient encoded data and the N+k encoded data, and decodes the N principal encoded data on the first finite field. When the decoder fails to decode the N principal encoded data, the decoder uses the k additional encoded data to assist the data decoding on the second finite field. After the decoding, a recovered source file is produced.06-21-2012
20120170641Channel Information Compressing Apparatus and Method, Channel Information Decompressing Apparatus and Method, Receiver, and Transmitter - A channel information compressing apparatus of the present invention includes a DCT part that performs discrete cosine transform on channel information (CSI) representing the state of a communication channel, and an information compressor that compresses high frequency components of information included in discrete cosine transform data which is produced by way of discrete cosine transform, thus compressing information while maintaining a good accuracy of channel information.07-05-2012
20100246661SYSTEM AND METHOD FOR HUFFMAN SHAPING IN A DATA COMMUNICATION SYSTEM - In a communication system, Huffman coding techniques are used to obtain shaping gains for an improvement in data transmission rates. More particularly, a novel method of Huffman shaping is described that achieves a shaping gain of greater than 1 dB. The shaping gain results in a higher data rate transmission in a communication system where transmitted power is constrained.09-30-2010
20080273588Matrix Compression Arrangements - This invention relates to utilising image compression and reconstruction algorithms for transmission and reception of data that can be represented as a numerical matrix or a sequence of numerical matrices in bandwidth limited channels. The method and algorithms described herein may reduce data size to such an extent that data that was considered too large to be practically transmitted in a useful time frame can be transmitted in real or near real time. The algorithms can be applied to data communications for a variety of sensor, electronic and information systems.11-06-2008
20120163445METHOD FOR ENCODING OR DECODING DIGITAL DATA, DATA DISSEMINATING DEVICE AND DATA MANAGING DEVICE - A method for encoding or decoding digital data, a data dissemination device and a data managing device are provided. The method for encoding digital data includes the following steps. A digital data is received. A sign data is encoded into the digital data through a linear combination operation to obtain an encoded digital data, wherein the size of the digital data is not changed after the encoding process. The encoded digital data is disseminated.06-28-2012
20090060025DIGITAL BROADCASTING TRANSMITTER, TURBO STREAM PROCESSING METHOD THEREOF, AND DIGITAL BROADCASTING SYSTEM HAVING THE SAME - A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency.03-05-2009
20090060024METHOD AND APPARATUS FOR ENCODING/DECODING MEDIA SIGNAL - A method and apparatus for encoding/decoding a media signal. The method of decoding a media signal includes extracting first table index information from a header. The first table index information indicates M (M03-05-2009
20090016427DECODING SYSTEM - A moving image process adjusting part 01-15-2009
20090016425Adaptive Compression of Channel Feedback Based on Second Order Channel Statistics - A method of variable rate vector quantization reduces the amount of channel state feedback. Channel coefficients of a communication channel are determined and second order statistics (e.g., variances) of the channel taps are computed). Bit allocation for the channel taps are determined based on the coefficients statistics. The channel taps are individually quantized at rates determined based on said bit allocations.01-15-2009
20080298459INTERACTIVE COMPRESSION WITH MULTIPLE UNITS OF COMPRESSION STATE INFORMATION - There is provided a method of interactive compression using multiple compression state information entries. The method comprises receiving a request for data from a communicating party; retrieving the data; identifying, for use in compressing the data, at least two compression state information entries shared between the parties to the communication; compressing the data with each of the at least two compression state information entries; determining, from the set of compression state information entries, a preferred compression state information entry that provides a greatest compression ratio; and transmitting the data, compressed in accordance with the preferred compression state information entry to the communicating party.12-04-2008
20080298458METHOD AND APPARATUS FOR COMMUNICATING COMPRESSION STATE INFORMATION FOR INTERACTIVE COMPRESSION - A method and system are provided for interactive data compression using shared compression state information. Compression state information provides assistance in the compression of the data being transmitted between two communicating parties.12-04-2008
20080298457Relay Device and Signal Decoding Device - There is provided a relay device capable of simultaneously transmitting various additional information such as audio information, character information, and image information while suppressing the communication cost and the line use ratio without increasing the calculation cost in the decoding process. The relay device includes an encoded information analysis unit (12-04-2008
20110235697Bandwidth Sensitive Data Compression and Decompression - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when, e.g., a bottleneck occurs so as to increase the throughput and eliminate the bottleneck.09-29-2011
20120243600METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION IN A BROADCASTING/COMMUNICATION SYSTEM - A method and an apparatus for encoding, transmitting, and receiving signaling information in a broadcasting/communication system are provided. The method includes generating the signaling information which comprises a plurality of pieces; determining a number of coded blocks to which the signaling information is to be encoded, based on a number of bits of the signaling information and a number of encoder input information bit; segmenting each piece of the signaling information based on the number of the coded blocks; constructing input information bits of each coded block to include segmented parts of each piece of the signaling information; encoding the input information bits to each coded block; and transmitting each coded block.09-27-2012
20080253440Methods and Apparatus For Mixing Compressed Digital Bit Streams - Methods, apparatus and articles of manufacture for mixing compressed digital bit streams are disclosed. An example method disclosed herein comprises acquiring a frame associated with a first compressed digital bit stream, unpacking the frame to obtain a plurality of original transform coefficient sets, and modifying the plurality of original transform coefficient sets to mix a second digital bit stream with the first compressed digital bit stream.10-16-2008
20080240225METHOD AND SYSTEM FOR ENHANCING THE PERFORMANCE OF WIDEBAND DIGITAL RF TRANSPORT SYSTEMS - A method and system for enhancing the performance of wideband digital RF transport systems, which enables the selection of a serial data rate to be transported over a transport medium. Thus, the present invention allows the system to be adapted to different transport mediums, and allows the user to set the serial data rate based on the input bandwidth of the system. The present invention also enables the transport of different bandwidth segments on a plurality of wideband channels by selecting an optimal clock sample rate for each bandwidth segment to be transported. Thus, the present invention allocates the bandwidth segments proportionally so that an optimum amount of bandwidth can be transported at the serial bit rate.10-02-2008
20080198919METHOD FOR DETERMINING THE LIKELIHOOD OF A MATCH BETWEEN SOURCE DATA AND REFERENCE DATA - A method for reducing data in the form of successive groups of N values may comprise finding the largest X values of the N values of each group, setting all but the largest X values of each group equal to zero, averaging W respective ones of the N values to produce N average values, finding the largest Y of the N average values, where Y is less than X, and setting the largest Y of the N average values equal to a first binary value, and a reminder of the N average values equal to a second binary value.08-21-2008
20080198918Compression and Decompression Using Corrections of Predicted Values - A decompression process is used that forms a decompressed data value by adding a correction value to a signal value prediction. During compression the required correction value is computed. The correction value is encoded in two parts, such as an absolute value and a sign. It is tested whether more than one valid possible decompressed data value can be obtained by adding the signal value prediction to all of a plurality of different possible correction values that are consistent with a first part. A second part of the correction information is included in the compressed data, for selecting among the more than one possible decompressed data values, conditional on a result of said testing. The second part is omitted in cases where there is no more than one valid possible decompressed data value. During decompression the prediction is determined and it is tested whether the second part is needed or not to determine an unambiguous signal value. The second part is read from the compressed data when it is needed to select an unambiguous signal value.08-21-2008
20110255588APPARATUS AND METHOD FOR ENCODING AND DECODING MULTICHANNEL SIGNAL - Disclosed is an apparatus for encoding and decoding multi-channel signals. The apparatus for encoding the multi-channel signals may shift a phase of the multi-channel signals based on a characteristic of the multi-channel signals. An encoded bitstream with respect to the multi-channel signals may be generated using a downmix signal and a residual signal extracted from the phase-shifted multi-channel signals.10-20-2011
20130148713METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS BASED ON DUAL COMPRESSIVE SENSING IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting signals based on dual sensing in a wireless communication system is disclosed. One or more sensor nodes receive Gaussian codes corresponding respectively to the one or more sensor nodes, allocated from a fusion center. The one or more sensor nodes determine whether to operate at a specific time. At least one sensor node that has determined to operate among the one or more sensor nodes multiplies the Gaussian codes by a transmission signal and transmits the multiplied signal to the fusion center.06-13-2013
20100316114BANDWIDTH SENSITIVE DATA COMPRESSION AND DECOMPRESSION - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, multiple access profiles are utilized to assist in compressing data according to various compression rates and compression ratios.12-16-2010
20100316113RECORDED MEDIUM HAVING PROGRAM FOR CODING AND DECODING USING BIT-PRECISION, AND APPARATUS THEREOF - A coding/decoding device using a bit-precision is disclosed. A coding device includes a bit-precision selecting unit, selecting a bit-precision value according to data to be coded; and a coding unit, generating a bit-stream by coding the data according to the selected bit-precision value, whereas the selected bit-precision value is inserted into the bit-stream.12-16-2010
20130188682APPARATUS FOR SYNCHRONIZATION OF AUDIO DATA AND VISUAL DATA AND METHOD THEREFOR - An apparatus for synchronizing audio data and visual data and a method therefor are provided. The apparatus includes a splitter, a synchronization unit coupled to the splitter, an audio control unit coupled to the splitter and the synchronization unit, and a visual data processing unit coupled to the splitter and the synchronization unit. The splitter receives an application layer data frame including audio data and visual data and splits the visual data from the audio data. The synchronization unit receives audio timing information of the audio data and acquires synchronization information according to the audio timing information and external timing information. The audio control unit receives and temporarily stores the audio data and outputs the audio data according to the synchronization information. The visual data processing unit analyzes and temporarily stores the visual data and outputs the visual data together with the audio data according to the synchronization information.07-25-2013
20120020406Method and apparatus for lossless encoding and decoding based on context - Provided are a method and apparatus of a lossless encoding and decoding based on a context. According to an embodiment, by aligning and coding symbols of a MSB, a coding efficiency may be enhanced. According to an embodiment, by estimating initial scaling information using a symbol located proximate to a symbol of the MSB, the coding efficiency may be enhanced.01-26-2012
20120093213CODING METHOD, CODING APPARATUS, CODING PROGRAM, AND RECORDING MEDIUM THEREFOR - A lossless coding technique for near-logarithmic companded PCM that achieves high compression performance is provided. In coding, the coding method that produces the smaller code amount is selected between the prediction coding method, which performs linear prediction of samples in a frame and codes the amplitude of the prediction error, and the normalization coding method, which normalizes the amplitude of the samples in the frame and codes the normalized amplitude, and a selection code that indicates the selection result is output. The samples in the frame are coded according to the selected coding method to produce a compression code. In decoding, the compression code is decoded according to a decoding process corresponding to the coding method specified by the selection code.04-19-2012

Patent applications in class BANDWIDTH REDUCTION OR EXPANSION

Patent applications in all subclasses BANDWIDTH REDUCTION OR EXPANSION