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Class 341/67 - To or from variable length codes


Subclass of Class 341 - Coded data generation or conversion
Definition: Subject matter for converting digital signals to or from
No. of patents: 1109
Last issue date: 05/22/2012


1                      
NumberTitleIssue Date
8184025Method and apparatus of generating codewords in wireless communication system
A method and apparatus for generating and transmitting codewords is provided. The method includes receiving information bits with a variable length, selecting vectors by the length of the information bits from a generator matrix, and generating a codeword based on t...
05/22/2012
8184024Data encoding process, data decoding process, computer-readable recording medium storing data encoding program, and computer-readable recording medium storing data decoding program
In a data encoding process: data is encoded by using unit bit series obtained from an encoding bit series; the encoding bit series is searched for a first bit series identical to a portion of the encoded data; the portion is substituted with a second bit series whic...
05/22/2012
8166082Variable length data storage device, variable length data storage method, variable length data reading method, and a program for the same
A variable length data storage device enables clearly and quickly determining where there are breaks in variable length data even when the variable length data is stored without gaps therebetween in a stored data file. A variable length data storage step (S509
04/24/2012
8106797Assigning codes to and repairing Huffman trees
A method for assigning codes to Huffman trees and repairing invalid Huffman trees is disclosed using a calculated delta and moving nodes within the Huffman tree by adjusting their encode register entries. ...
01/31/2012
8089379Variable length decoding apparatus and method
Techniques, apparatus and systems are described for performing variable length decoding. In one aspect, a variable length decoding apparatus includes a first computation unit to determine whether a symbol corresponding to an input data is included in an upper group ...
01/03/2012
8072358Variable length decoder, encoder, and variable length decoding method
A variable length decoder that decodes a variable length code to output data including a run and a level, the variable length decoder includes a memory that stores an output format of a run and a level according to a prefix for specifying an area which is generated ...
12/06/2011
8068043Method and apparatus for video processing in context-adaptive binary arithmetic coding
A method and apparatus of a digital signal processor for coding of a significant map. The method for coding of a significant map includes carrying out a scan of at least a portion of a block of transform coefficients; calculating runs of zeros of the scanned data; a...
11/29/2011
8044830Method and an apparatus for processing a signal
A method of processing a signal is disclosed. The present invention includes receiving a maximum number of band and a code value of at least one section length, calculating a bit number corresponding to the code value of the at least one section length using the max...
10/25/2011
8044831Decoding apparatus and control method thereof
The invention provides a decoding apparatus which guarantees a decoding speed of a predetermined unit. To this end, the decoding apparatus includes a shifter which detects a start bit of a codeword from coded data, a table which stores decode values of a plurality o...
10/25/2011
8009069Method and device for encoding a bit sequence
The invention is related to a method and a device for encoding of a bit sequence. Said method comprises generating, for each run of Ones comprised in the bit sequence, a unary representation of length of the respective run of Ones, generating a first sequence by con...
08/30/2011
8004431Fast parsing of variable-to-fixed-length codes
Methods and systems for parsing and decoding compressed data are provided. Random segments of the compressed data may be decompressed and positioned appropriately in the corresponding uncompressed data set. The methods and systems utilize variable to fixed length (V...
08/23/2011
7994949Unicode-compatible entropy coding
A character data set is compressed with a compression algorithm module of a computer system to generate one or more streams of encoded values. The compression module is configured to compress the character data set with an entropy encoder to generate one or more str...
08/09/2011
7994948Table generation method for decoding variable-length codes
Provided is a table generation method of decoding a variable-length code. The table generation method includes receiving a variable-length code table and a search width N, generating a K-ary tree from the variable-length code table and the search width N, and genera...
08/09/2011
7965206Apparatus and method of lossless coding and decoding
An apparatus and a method of lossless coding and decoding are provided. The apparatus to perform lossless coding may selectively perform an arithmetic coding scheme or a Huffman coding scheme with respect to a symbol. The apparatus to perform lossless coding may gen...
06/21/2011
7965207Variable length integer encoding system and method
Large integers may be stored according to byte-stable variable-length encoding systems and methods, eliminating the need to store many leading-zero bits in large integers. Such a byte-stable variable-length integer encoding scheme may represent identical sequences o...
06/21/2011
7956774Variable length coding method and variable length decoding method
An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the nu...
06/07/2011
7956773Method of driving bit stream processor
Provided is a bit stream processor using a reduced table lookup. The bit stream processor includes a bit stream exclusive register in a general purpose register in order to process data of a variable length effectively. Additionally, the bit stream processor an inst...
06/07/2011
7948406Method for encoding and decoding a sequence of integers
A method for encoding a sequence of integers includes identifying a contiguous sub-sequence in the sequence of integers wherein the sub-sequence includes interrelated integers having a same prefix when being variable length encoded and an independent last integer. A...
05/24/2011
7936290Dynamic selection of suitable codes for variable length coding and decoding
A data compressor for compressing a data signal and a corresponding data decompressor are disclosed. The data compressor comprises: compression circuitry for compressing said data signal using a plurality of variable length compression codes; a digital code select s...
05/03/2011
7924179Variable-length code determining device and variable-length code decoding method
To provide a decoding device that compactly stores prefix related information therein compatible to variable-length codes used in various systems. The decoding device includes a register file in which a prefix common portion and a word length of the prefix common po...
04/12/2011
7924180Huffman decoding method and apparatus
A decoder for decoding an input bit stream into a plurality of symbols is provided. The decoder includes an extractor, a length generator, a base selector, and a processing unit. The extractor receives the input bit stream and extracts a code with a predetermined co...
04/12/2011
7916047Systems and methods of clustered sharing of compression histories
Systems and methods of storing previously transmitted data and using it to reduce bandwidth usage and accelerate future communications are described. By using algorithms to identify long compression history matches, a network device may improve compression efficient...
03/29/2011
7907071Data conversion apparatus and control method thereof
This invention converts Packbit-encoded data into new Packbit-encoded data which allows to have a throughput=M. a extraction unit separates inputted encoded data into length information and data information, and outputs them to a conversion unit. The conversion unit...
03/15/2011
7884742System and method for efficient compression of digital data
A system for compressing digital data by representing a portion of it predictionally and transformationally as a block of transform coefficients, then quantizing that block selectively into a set of encoding symbols based on an indication whether the transform coeff...
02/08/2011
7872598Accelerated decompression
Techniques for decompressing a compressed input by determining, according to an ordering of allowable codewords, an offset for a variable length codeword detected in the input; accessing a record at the determined offset in a data structure having one record for eac...
01/18/2011
7864082Variable length code decoding device and decoding method
A variable length code decoding device for decoding variable length code data, including: a table memory that stores a plurality of decoding process tables having a reference relationship therein; and a decoding control unit that is given a start address and an init...
01/04/2011
7864081Fast implementation of decoding function for variable length encoding
An embodiment of the present inventions is a method for encoding/decoding data of variable length format and is used to omit unnecessary pieces of data for the purpose of improving processing performance, reducing the size of data on communication paths and efficien...
01/04/2011
7847711Generating a data stream and identifying positions within a data stream
Methods and apparatus, including computer program products, for generating a data stream encoded by means of a Variable Length Coding scheme. Code words for a data stream including a plurality of code words are encoded in accordance with a Variable Length Coding sch...
12/07/2010
7834782CABAC-type encoding device and method
A CABAC-type encoding device for encoding an initial flow of binary digital information for generating an output flow for forming video images after decoding, includes: elements for analyzing successive sequences of bits of the initial binary flow, bit-by-bit, and f...
11/16/2010
7834783Converting a mask constraint into a bitset constraint
Converting a mask constraint into a bitset constraint. For example, a method of converting a mask constraint into a bitset constraint may include determining an intermediate bitset based on a variable-bit component of the mask constraint; and generating the bitset c...
11/16/2010
7830281Variable-length code decoding apparatus, variable-length code decoding method, and program
Disclosed herein is a variable-length code decoding apparatus including: a code buffer that holds a variable-length code in which the same bit value continues for a given number of bits from the most significant bit; code word detectors each of which reads the varia...
11/09/2010
7804430Methods and apparatus for processing variable length coded data
An apparatus for processing variable length coded data includes a coefficient buffer unit and several lookup tables. The coefficient buffer unit includes a coefficient memory and an index register for storing an indication of a non-zero nature of coefficients stored...
09/28/2010
7800520Method and system for entropy coding
A method and system are provided for encoding a plurality of integers with variable-length code tables constructed by combining a plurality of structured code tables. Each code table has an associated set of integer values; the sets are disjoint and exhaustive, so t...
09/21/2010
7791510Encoding method and apparatus, and program
An encoding method for dividing a bit string of an input signal at a position of x bits from a least significant bit into a high-order bit string and a low-order bit string, performing variable-length-encoding of the high-order bit string, and performing fixed-lengt...
09/07/2010
7791509Preprocessing variable-length code (VLC) bitstream information
An information handling system includes a processor that may perform preprocessing on a variable-length code (VLC) bitstream before decoding the bitstream. The bitstream includes multiple codewords. The processor analyzes incoming VLC bitstream information and gener...
09/07/2010
7777653Decoding variable-length code (VLC) bitstream information
An information handling system includes a processor that may perform decoding of a variable-length code (VLC) bitstream after preprocessing the bitstream. The bitstream includes multiple VLC symbols as binary codewords. The processor analyzes incoming VLC bitstream ...
08/17/2010
7773004CAVLC run-before decoding scheme
Techniques for decoding the run_before fields in a CAVLC encoded bitstream for H.264 are disclosed. In one aspect, the codewords corresponding to a plurality of consecutive initial zero-value run_before codewords are stored in a look-up table, allowing the decoding ...
08/10/2010
7773005Method and apparatus for decoding variable length data
System and method for decompressing data. A compressed data stream including contiguous variable length data blocks is received, each variable length data block including multiple contiguous variable length data fields. A current data block of the contiguous variabl...
08/10/2010
7750829Scalable encoding and/or decoding method and apparatus
A method and apparatus to scalably encode or decode an audio signal or a video signal. A signal distribution is considered after binarization is performed based on a tree structure. Thus, a decoding end can minimize generation of quantization errors and restore an o...
07/06/2010
7728745Variable length code decoding apparatus and method with variation in timing of extracting bit string to be decoded depending on code word
A variable length code decoding apparatus according to the present invention includes: an extracting unit which extracts a bit string from a beginning of a bit stream; a first storage unit for storing a plurality of code words in which one piece of data has been cod...
06/01/2010
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