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1. WO2012119463 - CODING METHOD, DECODING METHOD, AND EQUIPMENTS FOR TRANSFORM COEFFICIENTS

Publication Number WO/2012/119463
Publication Date 13.09.2012
International Application No. PCT/CN2011/082597
International Filing Date 22.11.2011
IPC
H04N 7/30 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
24Systems for the transmission of television signals using pulse code modulation
26using bandwidth reduction
30involving transform coding
CPC
H04N 19/117
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
117Filters, e.g. for pre-processing or post-processing
H04N 19/129
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
129Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
H04N 19/132
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
132Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/60
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
H04N 19/61
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
61in combination with predictive coding
H04N 19/645
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
63using sub-band based transform, e.g. wavelets
64characterised by ordering of coefficients or of bits for transmission
645by grouping of coefficients into blocks after the transform
Applicants
  • 华为技术有限公司 HUAWEI TECHNOLOGIES CO., LTD. [CN]/[CN] (AllExceptUS)
  • 宋锦 SONG, Jin [CN]/[CN] (UsOnly)
  • 杨名远 YANG, Mingyuan [CN]/[CN] (UsOnly)
  • 王栋 WANG, Dong [CN]/[CN] (UsOnly)
Inventors
  • 宋锦 SONG, Jin
  • 杨名远 YANG, Mingyuan
  • 王栋 WANG, Dong
Agents
  • 深圳市深佳知识产权代理事务所(普通合伙) SHENPAT INTELLECTUAL PROPERTY AGENCY
Priority Data
201110057694.910.03.2011CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) CODING METHOD, DECODING METHOD, AND EQUIPMENTS FOR TRANSFORM COEFFICIENTS
(FR) PROCÉDÉ DE CODAGE, PROCÉDÉ DE DÉCODAGE, ET ÉQUIPEMENTS POUR DES COEFFICIENTS DE TRANSFORMÉE
(ZH) 变换系数的编码方法、变换系数的解码方法,和装置
Abstract
(EN) Disclosed in the present invention are a coding method, decoding method and equipments for transform coefficients. The coding method, for example, comprises the following steps: coding transform coefficients of a transform coefficients block according to a preset scanning sequence, and coding setting number of transform coefficients in each group, until coding the last group of the transform coefficients block; storing the acquired non-zero transform coefficients distribution, absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients; when the last group is coded, coding the stored non-zero transform coefficients distribution and the non-zero transform coefficients distribution of the last group coding into a code stream after the non-zero transform coefficients distribution of the last group coding is acquired, and coding the stored absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients together with the absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients of the last group coding into a code stream after the absolute values of the transform coefficients and positive or negative signs of the non-zero transform coefficients of the last group are acquired. It can improve the efficiency of coding and decoding.
(FR) La présente invention concerne un procédé de codage, un procédé de décodage, et des équipements pour des coefficients de transformée. Le procédé de codage, par exemple, comprend les étapes suivantes: le codage de coefficients de transformée d'un bloc de coefficients de transformée selon une séquence de balayage préétablie, et le codage de nombre d'établissement de coefficients de transformée dans chaque groupe, jusqu'au codage du dernier groupe de bloc de coefficients de transformée; le stockage de la distribution de coefficients de transformée non nuls acquise, de valeurs absolues des coefficients de transformée et de signes positifs ou négatifs des coefficients de transformée non nuls; lorsque le dernier groupe est codé, le codage de la distribution des coefficients de transformée non nuls stockée et de la distribution des coefficients de transformée non nuls du codage de dernier groupe en un flux de code après l'acquisition de la distribution des coefficients de transformée non nuls du codage de dernier groupe, et le codage des valeurs absolues des coefficients de transformée et de signes positifs ou négatifs des coefficients de transformée non nuls stockés conjointement avec les valeurs absolues des coefficients de transformée et de signes positifs ou négatifs des coefficients de transformation non nuls du codage de dernier groupe en un flux de code après l'acquisition des valeurs absolues des coefficients de transformée et de signes positifs ou négatifs des coefficients de transformée non nuls du codage de dernier groupe. Le procédé peut améliorer l'efficacité de codage et de décodage.
(ZH) 变换系数的编码方法、变换系数的解码方法,和装置。以编码方法为例:依照预置的扫描顺序对变换系数块的变换系数进行编码,且每组编码设定个数的变换系数,直到对所述变换系数块的最后一组编码;存储得到的非零变换系数分布、变换系数的绝对值以及非零变换系数的正负号;在所述最后一组编码时,得到最后一组编码的非零变换系数分布后,将存储的非零变换系数分布和所述最后一组编码的非零变换系数分布编入码流,得到所述最后一组编码的变换系数的绝对值以及非零变换系数的正负号后,将存储的变换系数的绝对值以及非零变换系数的正负号和最后一组编码的变换系数的绝对值以及非零变换系数的正负号编入码流。可以提高编解码效率。
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