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262results about How to "Efficient decoding" patented technology
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Enhanced block-request streaming using cooperative parallel HTTP and forward error correction
ActiveUS20110239078A1Improvement in user experience and bandwidth efficiencyGood presentationCode conversionError correction/detection using block codesClient-sideTransfer system
A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might or might not include a cache. A client device can be adapted to take advantage of the ingestion process as well as including improvements that make for a better presentation independent of the ingestion process. In the block-request streaming system, the an ingestion system generates data according to erasure codes and the client device, through various selection and timing of requests for media data and redundant data, can efficiently decode media to provide for presentations.
Owner:QUALCOMM INC
Image coding method, image decoding method, image coding apparatus, image decoding apparatus, integrated circuit and program
InactiveUS20110206135A1Efficient decodingSame qualityColor television with pulse code modulationColor television with bandwidth reductionComputer hardwareDecoding methods
Images are coded with higher efficiency while maintaining the same image quality. An image coding method of coding an image on a block basis, including: transforming (S1201) a two-dimensional array of pixel values of a current block to be encoded, into a two-dimensional array of transform coefficients; determining (S1202), depending on the two-dimensional array of the transform coefficients, a scan order for scanning the transform coefficients of the two-dimensional array; scanning (S1203) the transform coefficients of the two-dimensional array sequentially according to the scan order, to generate a one-dimensional array of the transform coefficients; and coding (S1204) the transform coefficients of the one-dimensional array.
Owner:PANASONIC CORP
Multi-mode audio signal decoder, multi-mode audio signal encoder, methods and computer program using a linear-prediction-coding based noise shaping
ActiveUS20120245947A1Without inacceptable artifactEasy transitionSpeech analysisLinear prediction codingFrequency spectrum
A multi-mode audio signal decoder has a spectral value determinator to obtain sets of decoded spectral coefficients for a plurality of portions of an audio content and a spectrum processor configured to apply a spectral shaping to a set of spectral coefficients in dependence on a set of linear-prediction-domain parameters for a portion of the audio content encoded in a linear-prediction mode, and in dependence on a set of scale factor parameters for a portion of the audio content encoded in a frequency-domain mode. The audio signal decoder has a frequency-domain-to-time-domain converter configured to obtain a time-domain audio representation on the basis of a spectrally-shaped set of decoded spectral coefficients for a portion of the audio content encoded in the linear-prediction mode and for a portion of the audio content encoded in the frequency domain mode. An audio signal encoder is also described.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Encoder, Decoder and Methods for Encoding and Decoding Data Segments Representing a Time-Domain Data Stream
ActiveUS20100138218A1Effective strikeEasy to useSpeech analysisDigital video signal modificationTime domainData stream
An apparatus for decoding data segments representing a time-domain data stream, a data segment being encoded in the time domain or in the frequency domain, a data segment being encoded in the frequency domain having successive blocks of data representing successive and overlapping blocks of time-domain data samples. The apparatus includes a time-domain decoder for decoding a data segment being encoded in the time domain and a processor for processing the data segment being encoded in the frequency domain and output data of the time-domain decoder to obtain overlapping time-domain data blocks. The apparatus further includes an overlap / add-combiner for combining the overlapping time-domain data blocks to obtain a decoded data segment of the time-domain data stream.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Broadcast signal transmitter/receiver, and broadcast signal transceiving method
ActiveUS20130243116A1Enhanced efficiencyIncrease robustnessModulated-carrier systemsBroadcast transmission systemsIn-band signalingService information
Disclosed are a broadcast signal transmitter, a broadcast signal receiver, and a method for transceiving a broadcast signal in the broadcast signal transmitter / receiver. A method for transmitting a broadcast signal comprises the following steps: signaling in-band signaling information to at least one of a service component physical layer pipe (PLP) including at least one service component of a broadcast service, a first information PLP including first service information applied to one broadcast service and a second information PLP including second service information applied commonly to a variety of broadcast services; performing the FEC encoding on data included in each PLP; performing time-interleaving on the FEC encoded data; generating a transmission frame including the time-interleaved data; and modulating the transmission frame and transmitting a broadcast signal including the modulated transmission frame.
Owner:LG ELECTRONICS INC
Moving Picture Coding Method And Moving Picture Decoding Method
ActiveUS20080089410A1Reduce data volumeEfficient decodingPulse modulation television signal transmissionPicture reproducers using cathode ray tubesVariable-length codeQuantization matrix
A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.
Owner:PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
Method and apparatus for decoding mixed code
ActiveUS20060098241A1Easy to decodeEfficient decodingUser identity/authority verificationImage codingHueDirection information
Provided are a method and apparatus for decoding a mixed code that is a combination of first and second code images. In the method, a mixed code image is obtained by receiving the original image having the mixed code image and removing noise from the original image. Next, the colors, shades, and brightnesses of pixels of the mixed code image are categorized into groups based on a predetermined threshold, the mixed code image is divided into first and second code images, and first and second information are extracted by decoding the first and second code images, respectively. The first and second code images can be effectively decoded by decoding interpretation information, construction information, error control information, and code direction information stored in the first and / or second code images.
Owner:INTELLECTUAL DISCOVERY CO LTD
Method for Predictive Coding of Point Cloud Geometries
InactiveUS20180053324A1Efficient decodingEfficient codingDetails involving 3D image dataImage codingPoint cloudThree-dimensional space
A method for encoding a point cloud representing a scene using an encoder including a processor in communication with a memory includes steps of fitting a parameterized surface onto the point cloud having input points representing locations in a three-dimensional space, generating model parameters from the parameterized surface, computing corresponding points from the parameterized surface, wherein the corresponding points correspond to the input points, computing residual data based on the corresponding points and the input points of the point cloud, compressing the model parameters and residual data to yield coded model parameters and coded residual data, respectively, and producing a bit-stream from the coded model parameters of the parameterized surface and the coded residual data.
Owner:MITSUBISHI ELECTRIC RES LAB INC
Image predictive coding method
InactiveUS6859559B2Increase speedImprove accuracyCode conversionImage codingIntra-frameComputer science
Owner:SUN PATENT TRUST
Relay node and method for receiving a signal from a base station in a mobile communication system
ActiveUS20120063386A1Efficiently receiveEfficient decodingSynchronisation arrangementFrequency-division multiplex detailsControl channelSubframe
Provided are a method for receiving information on a relay node zone and reference signals for a relay node from a base station, and a relay node device using same. The relay node can receive information on at least one start point from the start points of a Relay-Physical Downlink Control Channel (R-PDCCH) and a Relay-Physical Downlink Shared Channel (R-PDSCH) for transmitting a signal from a base station to a relay node in a specific downlink subframe. Alternatively, the relay node can implicitly recognize the start points of the R-PDCCH and R-PDSCH set in advance. The relay node can recognize a signal from the base station in the specific downlink subframe based on the start point information after the time corresponding to at least one of the start points of the R-PDCCH and R-PDSCH. Also, the relay node can decode signals transmitted from a base station after the corresponding timing.
Owner:LG ELECTRONICS INC
Enhanced block-request streaming using cooperative parallel HTTP and forward error correction
ActiveUS20140380113A1Improve efficiencyImprove experienceCode conversionError correction/detection using block codesTransport systemForward error correction
A block-request streaming system provides for improvements in the user experience and bandwidth efficiency of such systems, typically using an ingestion system that generates data in a form to be served by a conventional file server (HTTP, FTP, or the like), wherein the ingestion system intakes content and prepares it as files or data elements to be served by the file server, which might or might not include a cache. A client device can be adapted to take advantage of the ingestion process as well as including improvements that make for a better presentation independent of the ingestion process. In the block-request streaming system, the an ingestion system generates data according to erasure codes and the client device, through various selection and timing of requests for media data and redundant data, can efficiently decode media to provide for presentations.
Owner:QUALCOMM INC
Information encoding method and apparatus, information decoding method and apparatus and recording medium
InactiveUS6647063B1Efficient encode and decodeEfficient decodingDigital technique networkSpeech analysisTime frameSound quality
A method of encoding information of an input signal using a fixed number of bits for each unit time frame. Part of the encoded information of at least one second frame temporally consecutively or non-consecutively preceding or following a first frame is contained in the encoded information of the first frame. This eliminates fluctuations in the sound quality due to bit surplus / shortage resulting from quantization for achieving efficient encoding and decoding.
Owner:SONY CORP
Method, medium, and system encoding and/or decoding audio signals by using bandwidth extension and stereo coding
InactiveUS20080077412A1Improve audio signal qualityEfficient codingSpeech analysisTime domainBandwidth extension
A method, medium, and system encoding and / or decoding an audio signal by extracting stereo parameters from an input signal, encoding the stereo parameters, and performing down-mixing on the input signal to a down-mixed signal, splitting the down-mixed signal into a low band signal and a high band signal, determining whether to encode the low band signal in a time domain or a frequency domain, if the low band signal is determined to be encoded in the time domain, encoding the low band signal in the time domain, if the low band signal is determined to be encoded in the frequency domain, generating an encoded bitplane by converting the low band signal from the time domain to the frequency domain by using a first conversion method and performing quantization and context-dependent encoding on the low band signal converted to the frequency domain by using the first conversion method, converting each of the low band signal and the high band signal from the time domain to the frequency domain or a time / frequency domain by using a second conversion method, generating and encoding bandwidth extension information that represents a characteristic of the high band signal converted by the second conversion method by using the low band signal converted by the second conversion method, and outputting the encoded stereo parameters, the encoded bitplane, and the encoded bandwidth extension information a result of encoding the input signal. Accordingly, high frequency components and stereo components may be efficiently encoded and decoded at a potential restricted bit rate, thereby improving the quality of an audio signal.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and apparatus for encoding/decoding image using variable-size macroblocks
ActiveUS20130136179A1Efficiently encode and decodeHigh resolutionColor television with pulse code modulationColor television with bandwidth reductionComputer visionMacroblock
The video encoding / decoding apparatus includes a video encoder for encoding macroblocks by each of prediction basic unit candidates, determining prediction basic units based on encoding costs for each of the prediction basic unit candidates, and generating a bitstream including image data encoded in determined prediction basic units, information on a prediction type for each of the determined prediction basic units, and prediction data depending on the prediction type; and a video decoder for extracting information on the prediction type for each of the prediction basic units, prediction data depending on the prediction type, and encoded image data from the bitstream, and generating a reconstructed image by decoding the encoded image data depending on the prediction type for each of the prediction basic units.
Owner:SK TELECOM CO LTD
Coding and decoding of multiview videos
InactiveUS20130266065A1Quality improvementImprove performanceColor television with pulse code modulationColor television with bandwidth reductionComputer graphics (images)Single view
The present invention relates to a method for coding a multiview video stream (100) comprising a plurality of images (104, 105, 106) corresponding to single views of a scene (100) in a fixed time instant. Said method comprises the steps of: dividing each of the images (104, 105, 106) in a plurality of slices; coding (502, 611) each slice; generating a multiview video stream (100) comprising a plurality of separate video streams (101, 102, 103). Each of the separate video streams (101, 102, 103) comprises: a set of the coded slices (401), first information (107a) adapted to define the position of the slices (401) in the images (104, 105, 106) and second information (107b) adapted to identify at least one video stream (101, 103) of the multiview video stream (100), wherein the identified video stream (101, 103) comprises at least one slice (404, 405) that, in the scene (100), is adjacent to a slice of the set (401). The present invention also relates to a method for decoding a multiview video stream, that has been coded according to the above mentioned coding method. The present invention further relates to a coding apparatus and to a decoding apparatus (4) for multiview video streams.
Owner:ADVANCED DIGITAL BROADCAST
Method and Apparatus for Decoding Mixed Code
InactiveUS20140119647A1Efficient decodingEasy to decodeCharacter and pattern recognitionImage codingDirection informationComputer science
Provided are a method and apparatus for decoding a mixed code that is a combination of first and second code images. In the method, a mixed code image is obtained by receiving the original image having the mixed code image and removing noise from the original image. Next, the colors, shades, and brightnesses of pixels of the mixed code image are categorized into groups based on a predetermined threshold, the mixed code image is divided into first and second code images, and first and second information are extracted by decoding the first and second code images, respectively. The first and second code images can be effectively decoded by decoding interpretation information, construction information, error control information, and code direction information stored in the first and / or second code images.
Owner:INTELLECTUAL DISCOVERY CO LTD
Iterative decoding of punctured low-density parity check codes by selection of decoding matrices
ActiveUS20100275089A1Improve LDPC decoding performanceEfficient decodingCode conversionError correction/detection using block codesMatrix methodTheoretical computer science
Methods and apparatus for enabling effective decoding of rate-compatible punctured codes are presented herein. A puncturing component can derive one or more partial puncturing patterns and corresponding decoding matrices / graphs that represent punctured code from a parity check matrix / graph of a mother code and a puncturing pattern specified for the mother code. Further, a rowcombining component can combine rows of the parity check matrix / graph based on the derived one or more partial puncture patterns. Further, the rowcombining component can create at least one decoding matrix / graph to represent the punctured code based on the combined rows. In addition, a selection component can select a decoding matrix / graph from the created at least one decoding matrix / graph that does not contain a girth-4 cycle.
Owner:KAN LING CAPITAL
Sound coding device and method and sound decoding device and method
A sound encoding device comprises the time changing prediction analysis module to get the stimulation signal, time frequency mapping module to get the stimulation signal, encoding module to get the low frequency wave encoding data, middle frequency encoding data and high frequency parameter encoding data, bit current complex module for the repetitive use of the parameter encoding data to output sound encoding data. It also relates to a sound encoding method, a sound decoding device and method. It can realize high quality encoding for the sound and music at low code rate.
Owner:BEJING ANGEL VOICE DIGITAL TECH
Apparatus and method for coding and decoding multi-object audio signal with various channel including information bitstream conversion
ActiveUS20100114582A1Efficient decodingConsume audio contentSpeech analysisTransmissionComputer architectureObject code
Provided is an apparatus and method for coding and decoding multi-object audio signals with various channels and providing backward compatibility with a conventional spatial audio coding (SAC) bitstream. The apparatus includes: an audio object coding unit for coding audio-object signals inputted to the coding apparatus based on a spatial cue and creating rendering information for the coded audio-object signals, where the rendering information provides a coding apparatus including spatial cue information for audio-object signals; channel information of the audio-object signals; and identification information of the audio-object signals, and used in coding and decoding of the audio signals.
Owner:ELECTRONICS & TELECOMM RES INST
Video encoding apparatus and video decoding apparatus
InactiveUS20040091049A1Reduce in quantityReduce the numberGeometric image transformationPicture reproducers using cathode ray tubesMotion vectorSignal on
An alpha-map encoding apparatus includes a first down-sampling circuit (21) for down-sampling an alpha-map signal which represents the shape of an object and the position in the frame of the object at a down-sampling ratio based on size conversion ratio information, an up-sampling circuit (23) for up-sampling the alpha-map signal at an up-sampling ratio based on size conversion ratio information given to restore the down-sampled alpha-map signal to an original size, and outputting a local decoded alpha-map signal, a motion estimation / compensation circuit (25) for generating a motion estimation / compensation signal on the basis of the previous decoded video signal and a motion vector signal, a second down-sampling circuit (26) for down-sampling the motion estimation / compensation signal at the down-sampling ratio, a binary image encoder for encoding the alpha-map signal down-sampled by the first down-sampling circuit to a binary image in accordance with the motion estimation / compensation signal down-sampled by the second down-sampling circuit, and outputting an encoded binary image signal, and a multiplexer for multiplexing and outputting the encoded binary image signal and the up-sampling ratio information.
Owner:KK TOSHIBA
Methods and apparatuses for encoding and decoding audio signal
InactiveUS20090192792A1Efficient decodingEfficient encodingSpeech recognitionLinear prediction codingSound quality
Provided are methods and apparatuses for more efficiently encoding and decoding a high frequency band signal which is from an audio signal and which is greater than a predetermined threshold frequency. The method and apparatus for encoding the audio signal encodes a linear prediction coding (LPC) coefficient and gain information of a residual signal, which are generated by performing LPC analysis, thereby encoding a high frequency signal so as to have enhanced sound quality, while using less bits.
Owner:SAMSUNG ELECTRONICS CO LTD
Motion estimation and compensation method and device adaptive to change in illumination
InactiveUS20060133501A1Efficiently encodeEfficient decodingColor television with pulse code modulationColor television with bandwidth reductionPattern recognitionMotion vector
Provided are a motion estimation device and method adaptive to change in illumination. The motion estimation method includes the steps of: generating a current frame pattern block for a current frame block and a reference frame pattern block for a reference frame block; calculating the sum of absolute differences (SAD) for candidate pattern blocks corresponding to the current frame pattern block among the reference frame pattern blocks and determining the candidate pattern block corresponding to the SAD satisfying a predetermined condition among the calculated SADs as a motion vector; encoding the current frame block, by generating a residual signal using a difference signal between the candidate pattern block corresponding to the motion vector and the current frame pattern block then performing discrete cosine transform and quantization to the residual signal with a predetermined encoding mode; and adding flag information indicating the addition of a mean pixel value applied to the encoded current frame block and identification information on the encoding mode as header information corresponding to the encoded current frame block. By omitting insertion of a mean pixel value for some fields, it is possible to minimize the amount of bit streams transmitted to a decoder.
Owner:HUMAX CO LTD
Image encoding method, image decoding method, image encoding device, image decoding device, integrated circuit, and program
InactiveCN102197651AValid encodingEfficient decodingPulse modulation television signal transmissionDigital video signal modificationDecoding methodsImaging quality
Provided is an image encoding method which can effectively encode an image while maintaining the image quality at a certain level. The image encoding method encodes an image in a block unit. The method includes: a conversion step (S1201) which converts a two-dimensionally arranged pixel value in the block to be encoded into a two-dimensionally arranged conversion coefficient according to the two-dimensionally arranged conversion coefficient; a scan order determination step (S1202) which determines the scan order for scanning the two-dimensionally arranged conversion coefficient; a scan step (S1203) which successively scans the two-dimensionally arranged conversion coefficient in accordance with the scan order so as to generate a one-dimensionally arranged conversion coefficient string; and an encoding step (S1204) which encodes the one-dimensionally arranged conversion coefficient string.
Owner:PANASONIC CORP
Image prediction encoding/decoding system
ActiveUS20130136184A1Efficient decodingHigh movement precisionColor television with pulse code modulationColor television with bandwidth reductionAlgorithmImage prediction
An encoding target region in an image can be partitioned into a plurality of prediction regions. Based on prediction information of a neighboring region neighboring a target region, the number of previously-encoded prediction regions in the target region, and previously-encoded prediction information of the target region, a candidate for motion information to be used in generation of a predicted signal of the target prediction region as a next prediction region is selected from previously-encoded motion information of regions neighboring the target prediction region. According to the number of candidates for motion information selected, merging block information to indicate generation of the predicted signal of the target prediction region using the selected candidate for motion information and motion information detected by prediction information estimation means, or either one of the merging block information or the motion information is encoded.
Owner:NTT DOCOMO INC
Dual-stage data decoding for non-volatile memories
ActiveUS9294132B1Efficient decodingSame device enduranceOther decoding techniquesCode conversionDual stagePower consumption
A method and system for decoding information read from a non-volatile memory uses a two stage decoding algorithm, where the first stage is a high-speed, low precision decoder and the second stage is a low-speed, high precision decoder. Most of the time only the first stage of the decoder is used, which lowers the average power consumption of the decoding process.
Owner:PROTON DIGITAL SYST
Video encoding apparatus and video decoding apparatus
InactiveUS6198768B1Reduce in quantityReduce the numberGeometric image transformationPicture reproducers using cathode ray tubesMultiplexingMultiplexer
An alpha-map encoding apparatus includes a first down-sampling circuit (21) for down-sampling an alpha-map signal which represents the shape of an object and the position in the frame of the object at a down-sampling ratio based on size conversion ratio information, an up-sampling circuit (23) for up-sampling the alpha-map signal at an up-sampling ratio based on size conversion ratio information given to restore the down-sampled alpha-map signal to an original size, and outputting a local decoded alpha-map signal, a motion estimation / compensation circuit (25) for generating a motion estimation / compensation signal on the basis of the previous decoded video signal and a motion vector signal, a second down-sampling circuit (26) for down-sampling the motion estimation / compensation signal at the down-sampling ratio, a binary image encoder for encoding the alpha-map signal down-sampled by the first down-sampling circuit to a binary image in accordance with the motion estimation / compensation signal down-sampled by the second down-sampling circuit, and outputting an encoded binary image signal, and a multiplexer for multiplexing and outputting the encoded binary image signal and the up-sampling ratio information.
Owner:KK TOSHIBA
Estimation/Compensation Device for Mb/Based Illumination Change and Method Thereof
InactiveUS20080317131A1Efficient decodingMinimize transmission amount of transmittedColor television with pulse code modulationColor television with bandwidth reductionPattern recognitionAbsolute difference
An adaptive motion estimation / compensation device and a method thereof for MB-based illumination change are disclosed. If a macro block mode is determined as a newly designed P_L0_16×16_Mean by calculating the sum of an absolute difference, the motion estimation device CABAC-codes the absolute difference between the pixel mean of a current frame and the pixel mean of a candidate pattern block and transmits the CABAC-coded absolute difference to a pertinent decoder. With the present invention, the transmission amount of the bit stream transmitted to the decoder for decoding can be minimized by maximizing corresponding compressing rate.
Owner:HUMAX CO LTD
Method and apparatus for decoding mixed code
ActiveUS7751629B2Efficient decodingEasy to decodeUser identity/authority verificationImage codingDirection informationComputer science
Owner:INTELLECTUAL DISCOVERY CO LTD
Decoding and error correction in 2-D arrays
ActiveUS7116840B2Efficient decodingEffective imagingInput/output for user-computer interactionImage enhancementComputer scienceRepeat sequence
A system and process for determining the location of a captured image from a larger image is described. A non-repeating sequence may be folded into a non-repeating array in which the array is unique for every sub window of a given size. The image of the sub window may be captured and its location determined within the non-repeating array.
Owner:MICROSOFT TECH LICENSING LLC
Multi-mode audio encoder and audio decoder with spectral shaping in a linear prediction mode and in a frequency-domain mode
ActiveUS8744863B2Without inacceptable artifactEasy transitionSpeech analysisTime domainFrequency spectrum
A multi-mode audio signal decoder has a spectral value determinator to obtain sets of decoded spectral coefficients for a plurality of portions of an audio content and a spectrum processor configured to apply a spectral shaping to a set of spectral coefficients in dependence on a set of linear-prediction-domain parameters for a portion of the audio content encoded in a linear-prediction mode, and in dependence on a set of scale factor parameters for a portion of the audio content encoded in a frequency-domain mode. The audio signal decoder has a frequency-domain-to-time-domain converter configured to obtain a time-domain audio representation on the basis of a spectrally-shaped set of decoded spectral coefficients for a portion of the audio content encoded in the linear-prediction mode and for a portion of the audio content encoded in the frequency domain mode. An audio signal encoder is also described.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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