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Entropy Coding patents



      
           
This page is updated frequently with new Entropy Coding-related patent applications. Subscribe to the Entropy Coding RSS feed to automatically get the update: related Entropy RSS feeds. RSS updates for this page: Entropy Coding RSS RSS


Method for adaptive entropy coding of tree structures

Entropy coding of motion vector differences

Date/App# patent app List of recent Entropy Coding-related patents
07/17/14
20140198841
 Context intialization in entropy coding patent thumbnailContext intialization in entropy coding
A decoder includes an entropy decoder configured to derive a number of bins of the binarizations from the data stream using binary entropy decoding by selecting a context among different contexts and updating probability states associated with the different contexts, dependent on previously decoded portions of the data stream; a desymbolizer configured to debinarize the binarizations of the syntax elements to obtain integer values of the syntax elements; a reconstructor configured to reconstruct the video based on the integer values of the syntax elements using a quantization parameter, wherein the entropy decoder is configured to distinguish between 126 probability states and to initialize the probability states associated with the different contexts according to a linear equation of the quantization parameter, wherein the entropy decoder is configured to, for each of the different contexts, derive a slope and an offset of the linear equation from first and second four bit parts of a respective 8 bit initialization value.. .
07/03/14
20140185668
 Method for adaptive entropy coding of tree structures patent thumbnailMethod for adaptive entropy coding of tree structures
In 3d mesh coding, the geometry data is compressed by spatial tree based approaches. Bitstreams that result from the traversal of a tree structure of spatial tree based approaches for encoding 3d mesh models have systematically special redundancies, which is exploited for further improving the mesh model compression.
06/26/14
20140177707
 Entropy coding of motion vector differences patent thumbnailEntropy coding of motion vector differences
An entropy decoder is configured to, for horizontal and vertical components of motion vector differences, derive a truncated unary code from the data stream using context-adaptive binary entropy decoding with exactly one context per bin position of the truncated unary code, which is common for horizontal and vertical components of the motion vector differences, and an exp-golomb code using a constant equi-probability bypass mode to obtain the binarizations of the motion vector differences. A desymbolizer is configured to debinarize the binarizations of the motion vector difference syntax elements to obtain integer values of the horizontal and vertical components of the motion vector differences; a reconstructor is configured to reconstruct a video based on the integer values of the horizontal and vertical components of the motion vector differences..
05/29/14
20140146891
 Method and apparatus of scalable video coding patent thumbnailMethod and apparatus of scalable video coding
A method and apparatus for scalable video coding are disclosed, wherein the video data is configured into a base layer (bl) and an enhancement layer (el) and wherein the el has higher spatial resolution or better video quality than the bl. According to embodiments of the present invention, information from the base layer is exploited for coding the enhancement layer.
05/22/14
20140140400
 Entropy coding supporting mode switching patent thumbnailEntropy coding supporting mode switching
A decoder for decoding a data stream into which media data is coded has a mode switch configured to activate a low-complexity mode or a high-efficiency mode depending on the data stream, an entropy decoding engine configured to retrieve each symbol of a sequence of symbols by entropy decoding using a selected one of a plurality of entropy decoding schemes, a desymbolizer configured to desymbolize the sequence of symbols to obtain a sequence of syntax elements, a reconstructor configured to reconstruct the media data based on the sequence of syntax elements, selection depending on the activated low-complexity mode or the high-efficiency mode. In another aspect, a desymbolizer is configured to perform desymbolization such that the control parameter varies in accordance with the data stream at a first rate in case of the high-efficiency mode being activated and the control parameter is constant irrespective of the data stream or changes depending on the data stream, but at a second lower rate in case of the low-complexity mode being activated..
05/15/14
20140133581
 Image coding apparatus, image coding method, and recording medium thereof, image decoding apparatus, and image decoding method, and recording medium thereof patent thumbnailImage coding apparatus, image coding method, and recording medium thereof, image decoding apparatus, and image decoding method, and recording medium thereof
To prevent deterioration in performance that is caused by the processing for copying a context parameter between memories, an image processing apparatus writes an updated context parameter into context memories corresponding to respective entropy coding units and into a shared context memory, until it completes encoding processing for m blocks positioned on the left side of a slice.. .
05/01/14
20140119444
Intra frame predication scanning method for video coding and video coding method
An intra frame predication scanning method for video coding includes steps of: providing a two-dimensional residual coefficient array of a pixel block; dividing the two-dimensional residual coefficient array into a plurality of sub-arrays; converting, in a predetermined order, residual coefficients in the respective sub-array into a one-dimensional individual-sub-array residual coefficient series; connecting the one-dimensional individual-sub-array residual coefficient series of all the sub-arrays as a one-dimensional all-sub-array residual coefficient series of the pixel block; and performing an entropy coding on the one-dimensional all-sub-array residual coefficient series. A video coding method is also provided..
04/24/14
20140112387
 Separable directional transforms patent thumbnailSeparable directional transforms
This disclosure describes techniques for transforming residual blocks of video data. In particular, a plurality of different transforms selectively applied to the residual blocks based on the prediction mode of the video blocks.
04/17/14
20140105293
 Sample array coding for low-delay patent thumbnailSample array coding for low-delay
The entropy coding of a current part of a predetermined entropy slice is based on, not only, the respective probability estimations of the predetermined entropy slice as adapted using the previously coded part of the predetermined entropy slice, but also probability estimations as used in the entropy coding of a spatially neighboring, in entropy slice order preceding entropy slice at a neighboring part thereof. Thereby, the probability estimations used in entropy coding are adapted to the actual symbol statistics more closely, thereby lowering the coding efficiency decrease normally caused by lower-delay concepts.
04/03/14
20140092987
 Entropy coding techniques and protocol to support parallel processing with low latency patent thumbnailEntropy coding techniques and protocol to support parallel processing with low latency
In a communication system, parallel encoding and decoding of serially-coded data occurs in a manner that supports low latency communication. A plurality of data items may be coded as serially-coded data sequences and a transmission sequence may be built from them.
03/27/14
20140086265
Method and apparatus for a memory based packet compression encoding
Methods and apparatus for wireless communication in a mobile device that includes receiving a transmission data packet and detecting a string of bytes in the transmission data packet that matches a preset string of bytes saved in a memory component. Aspects of the methods and apparatus include replacing the string of bytes of the transmission data packet that has been determined to match the preset string of bytes saved in the memory component with a location pointer, wherein after replacing the string of bytes in the data packet with the location pointer, the data packet comprises the location pointer and a set of literal bytes.
03/20/14
20140079328
Encoding apparatus, decoding apparatus, and switcher apparatus
An encoding apparatus includes: an extraction unit to extract a boundary component from image data; a first frequency decomposition unit to perform frequency decomposition on the remaining image data to obtain a first low-frequency component and a first high-frequency component; a low-frequency signal processing unit to perform signal processing on the first low-frequency component; a high-frequency signal processing unit to perform signal processing on the first high-frequency component; a boundary component signal processing unit configured to perform signal processing on the extracted boundary component; a second frequency decomposition unit to perform frequency decomposition on the boundary component to obtain a second low-frequency component and a second high-frequency component; a coding unit to perform entropy coding on the first high-frequency component, the second low-frequency and high-frequency components; and a transmission unit to transmit the first low-frequency component, the coded second low-frequency component, and the coded first and second high-frequency components.. .
03/20/14
20140079124
Video encoding method and video encoding device
A video encoding method is provided, which includes: deciding a first search window of a first macroblock in a reference image, and deciding a second search window of a second macroblock in the reference image, wherein the first search window is at least partially overlapped with the second search window; reading the first search window and the second search window from a memory and executing a first encoding stage having motion estimation and binarization encoding; storing an encoding result of the first encoding stage in the memory; reading the encoding result from the memory and executing a second encoding stage. The second encoding stage has a context entropy coding, and an encoding order of the context entropy coding is different from that of the motion estimation, and the first encoding stage is executed in parallel with the second encoding stage.
03/13/14
20140072033
Method and apparatus of scalable video coding
A method and apparatus for scalable video coding are disclosed, wherein the video data is configured into a base layer (bl) and an enhancement layer (el) and wherein the el has higher spatial resolution or better video quality than the bl. According to embodiments of the present invention, information from the base layer is exploited for coding the enhancement layer.
03/06/14
20140064628
Entropy coding for recompression of images
A code is received. The code conveys data about a quantized coefficient that corresponds to a pixel of an image file.
03/06/14
20140064379
Video encoding and decoding with chrominance sub-sampling
In video encoding, a video input received in 4:2:2 is resampled. Residuals are formed through the use of reference samples stored in the native 4:2:2, before transforming, quantising and entropy coding to form an encoded bitstream in the resampled format.
03/06/14
20140064365
Methods and devices for entropy coding in scalable video compression
Methods and devices for decoding, in a video decoder, a block of enhancement-layer transform domain data for an enhancement-layer encoded video and corresponding to a reconstructed block of reference-layer transform domain data, are provided. The method includes determining a context for an enhancement-layer element based, at least in part, upon elements in the corresponding reconstructed block of reference-layer transform domain data, wherein the elements are identified by a template and wherein the position of the template in the reference-layer reconstructed block is based upon the position of that enhancement-layer element in the block of enhancement-layer transform domain data..
02/13/14
20140044194
Entropy coding techniques and protocol to support parallel processing with low latency
In a communication system, parallel encoding and decoding of serially-coded data occurs in a manner that supports low latency communication. A plurality of data items may be coded as serially-coded data sequences and a transmission sequence may be built from them.
02/13/14
20140044193
A guaranteed-rate tiled memory-data compression
A method of compressing digital image data is provided that includes, for each image data block in a plurality of image data blocks in the digital image data, transforming image data in the image data block to convert the image data to a low-frequency coefficient and a plurality of high-frequency coefficients, computing a predicted low-frequency coefficient for the image data block based on at least one neighboring image data block in the plurality of image data blocks, computing a residual low-frequency coefficient based on the predicted low-frequency coefficient and the low-frequency coefficient, quantizing the plurality of high-frequency coefficients, and entropy coding the residual low-frequency coefficient and the quantized high-frequency coefficients.. .
02/06/14
20140040214
Entropy coding and decoding using polar codes
Technologies are described herein for compressing or decompressing data using polar codes. Some example technologies may receive a data string comprising a first set of symbols.
01/16/14
20140016700
Method of coding and decoding images, coding and decoding device and computer programs corresponding thereto
A method of coding at least one image comprising the steps of splitting the image into a plurality of blocks, of grouping said blocks into a predetermined number of subsets of blocks, of coding each of said subsets of blocks in parallel, the blocks of a subset considered being coded according to a predetermined sequential order of traversal. The coding step comprises, for a current block of a subset considered, the sub-step of predictive coding of said current block with respect to at least one previously coded and decoded block, and the sub-step of entropy coding of said current block on the basis of at least one probability of appearance of a symbol..
01/16/14
20140015698
System and method for fixed rate entropy coded scalar quantization
A system and method combine an entropy coding algorithm like huffman or arithmetic coding with a fixed length coding scheme and can improve the compression performance in a fixed rate compression scheme. The fixed length code assigns codes with a fixed length to symbols that have the highest probability of occurrence.
01/02/14
20140003495
Method and apparatus of scalable video coding
A method and apparatus for scalable video coding are disclosed, wherein the video data is configured into a base layer (bl) and an enhancement layer (el) and wherein the el has higher spatial resolution or better video quality than the bl. According to embodiments of the present invention, information from the base layer is exploited for coding the enhancement layer.
12/26/13
20130343667
Image coding apparatus and image coding method
When performing pipeline processes by a prediction method determination unit, prediction coding unit, and entropy coding unit, the size of a block of an integer conversion unit (transform unit: tu) is set smaller than the size of a cu (coding unit). A generated code amount is fed back to the prediction coding unit on the tu basis, reducing a feedback delay and increasing the quantization control accuracy..
12/26/13
20130343448
Modified coding for transform skipping
Methods and devices for modified coding of blocks of residuals in the case of transform skipping. To better align the data with assumptions upon which the entropy coding scheme is based, the block of residual data is permuted at the encoder prior to entropy coding.
11/28/13
20130315300
Encoding method and device of video using data unit of hierarchical structure, and decoding method and device thereof
Provided are a method and a device for encoding a video by using a data unit of a hierarchical structure, and a method and a device for decoding the same. A video encoding device includes: a hierarchical encoder configured to encode a picture of a video based on a data unit of a hierarchical structure; and an entropy coder configured to determine a context model used for entropy coding of a symbol based on hierarchical information of a data unit to which the symbol of the encoded picture belongs, and to entropy encode the symbol using the determined context model..
11/21/13
20130308696
Method and apparatus for sample adaptive offset without sign coding
A method and apparatus for sample adaptive offset without sign coding. The method includes selecting an edge offset type for at least a portion of an image, classifying at least one pixel of at least the portion of the image into edge shape category, calculating an offset of the pixel, determining the offset is larger or smaller than a predetermined threshold, changing a sign of the offset based on the threshold determination; and performing entropy coding accounting for the sign of the offset and the value of the offset..
11/14/13
20130301944
Entropy coding method using an index mapping table, and image-encoding/decoding apparatus and method using said entropy coding method
Disclosed is an entropy coding method using an index mapping table, and an apparatus using the method. An imagedecoding method comprises: a step of mapping an inputted codeword to a code number with reference to an inverse codeword mapping table, and calculating the mapped code number in a table index; and a step of updating the inverse mapping table based on the accumulated number of occurrences of the code number, the number of sequential occurrences of the code number, neighbor block encoding/decoding information, and/or threshold value information for updating the inverse index mapping table.
11/14/13
20130300591
Entropy encoding and decoding scheme
Decomposing a value range of the respective syntax elements into a sequence of n partitions with coding the components of z laying within the respective partitions separately with at least one by vcl coding and with at least one by pipe or entropy coding is used to greatly increase the compression efficiency at a moderate coding overhead since the coding scheme used may be better adapted to the syntax element statistics. Accordingly, syntax elements are decomposed into a respective number n of source symbols si with i=1 .
10/03/13
20130259396
Image processing apparatus and image processing method for compressing image data by combining spatial frequency conversion, quantization, and entropy coding
An image processing apparatus is configured for compressing image data by combining spatial frequency conversion, quantization, and entropy coding. The apparatus includes a block division section, a spatial frequency conversion section, a quantization section, an encoding section, and a selection section.
09/26/13
20130251041
Deriving context for last position coding for video coding
In one example, a device includes a video coder configured to determine a context for entropy coding a bin of a value indicative of a last significant coefficient of a block of video data using a function of an index of the bin, and code the bin using the determined context. The video coder may encode or decode the bin using context-adaptive binary arithmetic coding (cabac).
09/19/13
20130241752
Methods and devices for coding and decoding the position of the last significant coefficient
Methods and devices are described for entropy coding data using an entropy coder to encode quantized transform domain coefficient data. Last significant coefficient information is signaled in the bitstream using two-dimensional coordinates for the last significant coefficient.
08/29/13
20130223536
Parallel pyramid entropy coding for video and image compression
Methods, systems, and computer program products are provided to divide code blocks, such as blocks of quantized coefficient of image or video data, into smaller blocks and sub-blocks that can be processed in parallel using layered entropy coding and decoding scheme. This division is accomplished while still encoding the entire code block using the same layered entropy coding scheme..
08/15/13
20130208806
Method and apparatus for improved entropy encoding and decoding
Methods and apparatus are provided for improved entropy encoding and decoding. An apparatus includes a video encoder for encoding at least a block in a picture by transforming a residue of the block to obtain transform coefficients, quantizing the transform coefficients to obtain quantized transform coefficients, and entropy coding the quantized transform coefficients.
08/08/13
20130202028
Cascading multiple video transcoders in a video processing system
A system (and a method) are disclosed for a video processing system with enhanced entropy coding performance. The system includes an entropy decoder configured to divide decoding of an input video stream into arithmetic decoding and syntax decoding.
07/25/13
20130188700
Context adaptive entropy coding with a reduced initialization value set
Techniques for coding data, such as, e.g., video data, include coding a first syntax element, conforming to a particular type of syntax element, of a first slice of video data, conforming to a first slice type, using an initialization value set. The techniques further include coding a second syntax element, conforming to the same type of syntax element, of a second slice of video data, conforming to a second slice type, using the same initialization value set.
07/04/13
20130170556
Variable length coding and decoding using counters
Disclosed herein are representative embodiments for performing entropy coding or decoding using a counter-based scheme. In one exemplary embodiment disclosed herein, a first codeword is received from compressed digital media data.
05/23/13
20130128949
Early stage slice cap decision in video coding
A method for making a slice cap decision during encoding of a video sequence in a video encoding pipe is provided that includes determining a prediction mode for a macroblock, computing an estimated encoded size of the macroblock based on an adaptive macroblock size estimation model, and making a slice cap decision for a current slice based on the estimated encoded macroblock size, wherein the slice cap decision is made prior to entropy coding the macroblock.. .
05/09/13
20130114691
Adaptive initialization for context adaptive entropy coding
In one example, an apparatus for context adaptive entropy coding a video unit comprises a coder configured to code a syntax element, wherein a first value of the syntax element indicates that one or more of a plurality of context states are initialized using an adaptive initialization mode for the video unit, and a second value of the syntax element indicates that each of the plurality of context states is initialized using a default initialization mode for the video unit. In some examples, when the syntax element has the first value, the coder is further configured to code a map that indicates which of the context states are initialized using the adaptive initialization mode, and to further code either an initial state value for those contexts, or information from which the initial state values of those adaptively initialized context may be derived..
05/09/13
20130114675
Context state and probability initialization for context adaptive entropy coding
In one example, an apparatus for context adaptive entropy coding may include a coder configured to determine one or more initialization parameters for a context adaptive entropy coding process based on one or more initialization parameter index values. The coder may be further configured to determine one or more initial context states for initializing one or more contexts of the context adaptive entropy coding process based on the initialization parameters.
04/25/13
20130101033
Coding non-symmetric distributions of data
This disclosure describes techniques for coding non-symmetric distributions of data and techniques for quantization matrix compression. The techniques for coding non-symmetric distributions of data may use a mapping that is configured to bias either positive data values or negative data values of a signed integer source towards shorter codewords of a variable length code that codes non-negative integers.
04/11/13
20130089137
Rate distortion optimization in image and video encoding
An offline quantization module is used to optimize a rate-distortion task. The offline quantization module calculates a quantization kernel for a range of computable block parameters and a range of rate-distortion slope values representing the rate and complexity of a coded video.
04/04/13
20130083856
Contexts for coefficient level coding in video compression
This disclosure describes techniques for coding video data. In particular, this disclosure describes techniques for entropy coding of residual transform coefficients generated by a video coding process.
03/21/13
20130070848
Line buffer reduction for short distance intra-prediction
A video coder, such as a video encoder or a video decoder, identifies an entropy coding context in a set of one or more entropy coding contexts. The video coder identifies the entropy coding context without reference to a neighboring coding unit that is above a current coding unit in a current picture.
03/14/13
20130064294
Context adaptive entropy coding for non-square blocks in video coding
Disclosed are techniques for coding coefficients of a video block having a non-square shape defined by a width and a height, comprising coding one or more of x- and y-coordinates that indicate a position of a last non-zero coefficient within the block according to an associated scanning order, including coding each coordinate by determining one or more contexts used to code the coordinate based on one of the width and the height that corresponds to the coordinate, and coding the coordinate by performing a context adaptive entropy coding process based on the contexts. Also disclosed are techniques for coding information that identifies positions of non-zero coefficients within the block, including determining one or more contexts used to code the information based on one or more of the width and the height, and coding the information by performing a context adaptive entropy coding process based on the contexts..
03/07/13
20130058407
Coding of transform coefficients for video coding
This disclosure describes coding transform coefficients associated with a block of residual video data in a video coding process. Aspects of this disclosure include the selection of a scan order for both significance map coding and level coding, as well as the selection of contexts for entropy coding consistent with the selected scan order.
02/21/13
20130044810
2-bin parallel decoder for advanced video processing
A critical phase of video processing is the decoding of bit streams coming from standard based heavy compressed sources. Entropy coding can be effectively decoded by adopting parallelism to speed up the process.
02/14/13
20130039596
Optimized method and system for entropy coding
An optimized method and system for entropy coding is described. The system may include an input module to receive a digital image, a discrete cosine transform (dct) module to obtain a plurality of dct coefficients associated with the digital image, a statistics generator to generate statistics associated with the plurality of dct coefficients, a placement module to store the generated statistics in the plurality of dct coefficients and entropy coder to generate uniquely decodable (ud) codes for the plurality of dct coefficients.
02/07/13
20130034167
Video coding and decoding methods and apparatuses
A coding method includes: partitioning an image block to be decoded irregularly according to an irregular partitioning mode and a position parameter to obtain at least two different sub-blocks; comparing the sub-blocks with a reference sub-block to obtain a residual of a pixel value of the image block to be coded; obtaining a reference position parameter according to a surrounding block of the image block to be coded, and subtracting the reference position parameter from the position parameter of the image block to be coded to obtain a position parameter difference of the image block to be coded; quantizing the residual, and performing entropy coding on a result of the quantization, the motion vector information, and the position parameter difference; and writing the entropy coding result and partitioning mode information of the image block into a code stream.. .
02/07/13
20130034148
Unified binarization for cabac/cavlc entropy coding
Unified binarization for cabac/cavlc entropy coding. Scalable entropy coding is implemented in accordance with any desired degree of complexity (e.g., entropy encoding and/or decoding).
01/31/13
20130028329
Device and methods for scanning rectangular-shaped transforms in video coding
Devices and methods that allow for applying a wavefront scan to rectangular transform blocks are described herein. Such devices and methods may allow greater efficiencies for entropy coding by enabling parallel processing of transform coefficients.
01/31/13
20130027230
Entropy coding
An encoder for encoding a sequence of symbols is described which includes an assigner configured to assign a number of parameters to each symbol of the sequence of symbols based on information contained within previous symbols of the sequence of symbols; a plurality of entropy encoders each of which is configured to convert the symbols forwarded to the respective entropy encoder into a respective bitstream; and a selector configured to forward each symbol to a selected one of the plurality of entropy encoders, the selection depending on the number of parameters assigned to the respective symbol.. .
01/10/13
20130011124
Information processing device, information recording medium, information processing method, and program
A data recording/playing configuration on a coding process for a recorded 3d image. Attribute information of the 3d image is recorded in each of hierarchized management information files as an attribute in units of management data of each of the management information files.
01/03/13
20130003858
Simplified context selection for entropy coding of transform coefficient syntax elements
A method for entropy encoding syntax elements of transform coefficient levels in a video encoder to generate a compressed video bit stream is provided that includes selecting a context for a first significant coefficient flag corresponding to a first transform coefficient level in a 32×32 transform block, wherein the first transform coefficient level is at a lowest frequency position in the 32×32 transform block, entropy encoding the first significant coefficient flag using the context, selecting the context for a second significant coefficient flag corresponding to a second transform coefficient level in a 16×16 transform block, wherein the second transform coefficient level is at a lowest frequency position in the 16×16 transform block, and entropy encoding the second significant coefficient flag using the context.. .
01/03/13
20130003824
Applying non-square transforms to video data
In one example, a device for coding video data includes a video coder, such as a video encoder or a video decoder, that is configured to code information indicative of whether a transform unit of the video data is square or non-square, and code data of the transform unit based at least in part on whether the transform unit is square or non-square. In this manner, the video coder may utilize non-square transform units.


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Entropy Coding topics: Entropy Coding, Arithmetic, Quantization, Coordinates, Variable Length, Arithmetic Coding, Initialize, Image Processing, Computer Program, Video Processing, Memory Management, Variable Length Coding, Digital Media, Slope Selection, Coding Standards

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