专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

EP2369747B1 Compression method using irreducible context-dependent grammar and context dependent arithmetic coding 有权转让
公开(公告)号：EP2369747B1
公开(公告)日：2018-09-05
申请号：EP11157500.7
申请日：2003-07-11
申请人： BlackBerry Limited
发明人： Yang, En-hui , He, Dake
IPC分类号： H03M7/30 , H03M7/40
CPC分类号： H03M7/4006 , H03M7/3084
摘要： A method of lossless data compression is provided which uses a grammar transform to sequentially construct a sequence of greedy context-dependent grammars from an original data sequence and an adaptive context-dependent arithmetic coding.

2. 发明授权

EP2191650B1 ARCHITECTURE FOR MULTI-STAGE DECODING OF A CABAC BITSTREAM 有权
公开(公告)号：EP2191650B1
公开(公告)日：2018-08-15
申请号：EP08798975.2
申请日：2008-08-29
申请人： QUALCOMM Incorporated
发明人： BAO, Yiliang , YOSHINO, Toshiaki , WANG, Kai
IPC分类号： H03M7/40 , H04N19/13 , H04N19/61 , H04N19/44 , H04N19/91
CPC分类号： H03M7/4006 , H04N19/13 , H04N19/42 , H04N19/44 , H04N19/61 , H04N19/91
摘要： Techniques for optimizing the Context-based Adaptive Binary Arithmetic Coding (CABAC) bitstream decoding are disclosed. In one configuration, a device has a first processing circuit operative to decode a Context-based Adaptive Binary Arithmetic Coding (CABAC) bitstream into an intermediate signal having a CABAC decoded standard format and a decoded order. A second processing circuit decodes the intermediate signal using a non-CABAC decoding standard. A buffer is provided between the first and second processing circuits to improve processing speeds.

3. 发明公开

EP3349360A1 ENTROPY ENCODING AND DECODING SCHEME 有权转让
公开(公告)号：EP3349360A1
公开(公告)日：2018-07-18
申请号：EP18160276.4
申请日：2012-01-12
申请人： GE Video Compression, LLC
发明人： MARPE, Detlev , NGUYEN, Tung , SCHWARZ, Heiko , WIEGAND, Thomas
IPC分类号： H03M7/40 , H03M7/00 , H03M7/46
CPC分类号： H03M7/00 , H03M7/40 , H03M7/4006 , H03M7/46
摘要： 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, in accordance with embodiments, syntax elements are decomposed into a respective number n of source symbols s i with i=1...n, the respective number n of source symbols depending on as to which of a sequence of n partitions (140 1-3 ) into which a value range of the respective syntax elements is sub-divided, a value z of the respective syntax elements falls into, so that a sum of values of the respective number of source symbols s i yields z, and, if n>1, for all i=1...n-1, the value of s i corresponds to a range of the i th partition.

4. 发明授权

EP3108584B1 MEHTODS AND DEVICES FOR SOURCE-CODING AND DECODING OF DATA INVOLVING SYMBOL COMPRESSION 有权
标题翻译：对符号压缩涉及的数据进行源编码和解码的方法和装置
公开(公告)号：EP3108584B1
公开(公告)日：2018-04-11
申请号：EP15705916.3
申请日：2015-02-20
申请人： Gurulogic Microsystems OY
发明人： KALEVO, Ossi , KÄRKKÄINEN, Tuomas , HUHTANIEMI, Artur
IPC分类号： H03M7/40 , H04N19/00
CPC分类号： H03M7/6058 , H03M7/40 , H03M7/4006 , H03M7/42 , H04N19/436 , H04N19/44 , H04N19/625 , H04N19/91
摘要： A method of encoding input data in an encoder to generate corresponding encoded data includes splitting and/or transforming the input data into data chunks, analyzing symbols present in the input data and compressing the symbols as a function of occurrence of the symbols in the data chunks; generating code tables, frequency tables, and/or length of code word tables for the symbols present in the data chunks; computing sets of indices relating the symbols in each data chunk and/or the compressed symbols to entries in the code tables, the frequency tables, and/or the length of code word tables; and assembling the sets of indices, together with the frequency tables, the code tables, and/or information indicative of such tables, for generating the encoded data. An encoder that utilizes the method, together with a corresponding decoder, wherein the encoder and the decoder in combination form a codec.

5. 发明公开

EP3295568A1 IMPROVED COMPRESSED CACHING IN A VIRTUAL MEMORY SYSTEM 有权
公开(公告)号：EP3295568A1
公开(公告)日：2018-03-21
申请号：EP16719648
申请日：2016-04-15
申请人： QUALCOMM INC
发明人： MILNER ADRIENNE , ANSARI AMIN , SENIOR RICHARD , BICA VITO REMO
IPC分类号： H03M7/30 , G06F12/08 , H04N19/91
CPC分类号： H03M7/4062 , G06F2212/401 , H03M7/30 , H03M7/3084 , H03M7/4006 , H03M7/42 , H03M7/48 , H04N19/423 , H04N19/91
摘要： Data compression systems, methods, and computer program products are disclosed. For each successive input word of an input stream, it is determined whether the input word matches an entry in a lookback table. The lookback table is updated in response to the input word. Input words may be of a number of data types, including zero runs and full or partial matches with an entry in the lookback table. A codeword is generated by entropy encoding a data type corresponding to the input word. The lookback table may be indexed by the position of the input word in the input stream.

6. 发明公开

EP3098969A1 VARIABLE LENGTH ENCODING METHOD AND DEVICE 有权
标题翻译： VERFAHREN ZUR CODIERUNG MIT VARIABLERLÄNGE，VORRICHTUNG ZUR CODIERUNG MIT VARIABLERLÄNGE
公开(公告)号：EP3098969A1
公开(公告)日：2016-11-30
申请号：EP16171139.5
申请日：2003-03-13
申请人： Panasonic Intellectual Property Corporation of America
发明人： KADONO, Shinya , MATSUI, Yoshinori , KONDO, Satoshi
IPC分类号： H03M7/42 , H04N19/46 , H04N19/91
CPC分类号： H03M7/4006 , H03M7/42 , H04N19/46 , H04N19/70 , H04N19/91
摘要： The present invention relates to a variable-length encoding method that encodes a unit data included in a picture composed of a plurality of sub-data while referring to a probability table, comprising:
a table setting step of setting a probability table to be an initial value based on an initial value of a quantization parameter of the unit data;
a judgment step of judging if initialization information related to the initial value of the probability table is necessary to be encoded or not;
an initialization information encoding step of encoding the initialization information only when it is judged in the judgment step that the initialization information is necessary to be encoded and setting the probability table to be a predetermined initial value when it is judged in the judgment step that the initialization information is not necessary to be encoded;
an encoding parameter obtainment step of obtaining encoding parameters to be used in the encoding of sub-data;
a sub-data encoding step of performing an arithmetic encoding on the sub-data with reference to respective encoding parameters;
a probability table updating step of updating the probability table based on a value of the encoded sub-data; and
an encoded information placement step of placing the encoded initialization information related to the initial value of the probability table in a position in which the encoded initialization information can be obtained before the encoded unit data,
and to the corresponding variable-length encoding device.
摘要翻译：本发明涉及一种可变长度编码方法，该方法对参考概率表的多个子数据构成的图像中包含的单位数据进行编码，其特征在于，包括：表格设定步骤，将概率表设定为初始基于所述单位数据的量化参数的初始值的值; 判断是否需要编码与概率表的初始值相关的初始化信息的判断步骤; 初始化信息编码步骤，仅当在判断步骤中判断为需要编码初始化信息时将初始化信息编码，并且当在判断步骤中判断为初始化时将初始化信息设置为预定初始值时，将该概率表设置为预定初始值信息无需编码; 编码参数获取步骤，用于获得要在子数据的编码中使用的编码参数; 子数据编码步骤，参照各编码参数对子数据进行算术编码; 概率表更新步骤，基于编码子数据的值来更新概率表; 以及编码信息放置步骤，将与概率表的初始值相关的编码的初始化信息放置在编码的单位数据之前可以获得编码的初始化信息的位置，以及相应的可变长度编码装置。

7. 发明授权

EP2664070B1 ENTROPY ENCODING AND DECODING SCHEME 有权转让
标题翻译： SCHEMA用于熵编码和解码
公开(公告)号：EP2664070B1
公开(公告)日：2016-11-02
申请号：EP12700329.1
申请日：2012-01-12
申请人： GE Video Compression, LLC
发明人： MARPE, Detlev , NGUYEN, Tung , SCHWARZ, Heiko , WIEGAND, Thomas
IPC分类号： H04N19/13 , H03M7/40
CPC分类号： H03M7/00 , H03M7/40 , H03M7/4006 , H03M7/46
摘要： 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, in accordance with embodiments, syntax elements are decomposed into a respective number n of source symbols s i with i=1...n, the respective number n of source symbols depending on as to which of a sequence of n partitions (140 1-3 ) into which a value range of the respective syntax elements is sub-divided, a value z of the respective syntax elements falls into, so that a sum of values of the respective number of source symbols s i yields z, and, if n>1; for all i=1...n-1, the value of s i corresponds to a range of the i th partition.

8. 发明公开

EP3079261A1 METHOD AND APPARATUS FOR ARITHMETIC DECODING 有权
标题翻译： VERFAHREN UND VORRICHTUNG ZUR ARITHMETISCHEN DECODIERUNG
公开(公告)号：EP3079261A1
公开(公告)日：2016-10-12
申请号：EP16156283.0
申请日：2003-09-19
申请人： NTT DOCOMO, INC.
发明人： BOSSEN, Frank, Jan
IPC分类号： H03M7/40 , H04N19/13
CPC分类号： H03M7/4006 , H04N19/13
摘要： A decoding method and an arithmetic decoder are disclosed. In on embodiment, an arithmetic decoder comprises a sequencer to generate a context identifier for an event of an event sequence; a probability estimator to determine a value for a least probable symbol (LPS) and a probability estimate for the LPS; and a decoding engine including a range register to assign a value to a range for the LPS, wherein the decoding engine determines the value of the range for the LPS based on the probability estimate, a value stored in the range register and the context identifier, and the decoding engine further determines a value of a binary event as decoding result, based on the value of the range for the LPS and bits from an information sequence including arithmetically encoded data.
摘要翻译：公开了一种解码方法和算术解码器。在实施例中，算术解码器包括用于生成事件序列的事件的上下文标识符的定序器; 用于确定最小可能符号（LPS）的值和LPS的概率估计的概率估计器; 以及包括范围寄存器的解码引擎，用于将值分配给所述LPS的范围，其中所述解码引擎基于所述概率估计来确定所述LPS的范围的值，存储在所述范围寄存器中的值和所述上下文标识符，并且解码引擎还根据包括算术编码数据的信息序列中的LPS和比特的范围的值，进一步确定二进制事件的值作为解码结果。

9. 发明公开

EP2572455A4 METHODS AND DEVICES FOR REDUCING SOURCES IN BINARY ENTROPY CODING AND DECODING 有权转让
标题翻译：方法和设备减少BINARY熵编码和解码SOURCES
公开(公告)号：EP2572455A4
公开(公告)日：2015-12-23
申请号：EP11782837
申请日：2011-05-20
申请人： BLACKBERRY LTD
发明人： KORODI GERGELY FERENC , HE DAKE
IPC分类号： H03M7/40
CPC分类号： H03M7/4006
摘要： Methods and systems are described for combining sources in a data compression system. In a system in which a context model results in the production of multiple sources or symbols, each source being associated with a probability estimate, sources may be combined by defining another, reduced size, set of probabilities. The new set of probabilities may be a subset of the predefined set of probabilities provided by the context model. Minimizing relative entropy may be a basis upon which to define a mapping of predefined probabilities to the new set of probabilities. An input sequence that was modeled using the context model may then be entropy encoded and entropy decoded using the new set of probabilities based on a mapping between the new probabilities and the predefined probabilities.

10. 发明授权

EP1504408B1 SYSTEM AND METHOD FOR ARITHMETIC ENCODING 有权转让
标题翻译：系统和方法算术编码
公开(公告)号：EP1504408B1
公开(公告)日：2015-10-28
申请号：EP03718500.6
申请日：2003-04-23
申请人： NTT DoCoMo, Inc.
发明人： BOSSEN, Frank, Jan
IPC分类号： G06K9/46 , H03M7/40
CPC分类号： H03M7/4006

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式