Video encoding device, video decoding device, video encoding method, video decoding method, and program

Patent metadata

Field	Value
Publication number	US-10742991-B2
Application number	US-201615146005-A
Country	US
Kind code	B2
Filing date	May 4, 2016
Priority date	Nov 26, 2010
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A video encoding device includes: transform means 11 for transforming an image block; entropy encoding means 12 for entropy-encoding transformed data of the image block transformed by the transform means 11; PCM encoding means 13 for PCM-encoding the image block; multiplex data selection means 14 for selecting output data of the entropy encoding means 12 or the PCM encoding means 13, in a block of a block size set from the outside; and multiplexing means 15 for embedding a PCM header in a bitstream, in the block of the set from the outside block size.

First claim

The invention claimed is:

1. A video decoding device comprising:
one or more processors, the one or more processors configured to:
extract PCM block size information from a bitstream, the PCM block size information indicating a threshold to be used at a subsequent PCM header parsing process;
compute the threshold based on the PCM block size information;
execute the parsing process of parsing a PCM header from the bitstream with respect to an encoded block, only when a block size of the encoded block is equal to or less than the computed threshold;
parse transformed data of an image in the bitstream based on the PCM header; and
decode by PCM decoding PCM data of the image in the bitstream based on the PCM header.

2. A video decoding method comprising:
extracting PCM block size information from a bitstream, the PCM block size information indicating a threshold to be used at a subsequent PCM header parsing step;
computing the threshold based on the PCM block size information;
parsing a PCM header from the bitstream with respect to an encoded block, only when a block size of the encoded block is equal to or less than the computed threshold;
controlling an entropy decoding process and a PCM decoding process based on the PCM header;
parsing transformed data of an image in the bitstream upon the entropy decoding process being controlled; and
decoding by PCM-decoding PCM data of the image in the bitstream upon the PCM decoding process being controlled.

3. A non-transitory computer readable information recording medium storing video decoding program which, when executed by a processor, performs a method comprising:
extracting PCM block size information from a bitstream, the PCM block size information indicating a threshold to be used at a subsequent PCM header parsing step;
computing a the threshold based on the PCM block size information;
parsing a PCM header from the bitstream with respect to an encoded block, only when a block size of the encoded block is equal to or less than the computed threshold;
controlling an entropy decoding process and a PCM decoding process based on the PCM header;
parsing transformed data of an image in the bitstream upon the entropy decoding process being controlled; and
decoding by PCM-decoding PCM data of the image in the bitstream upon the PCM decoding process being controlled.

Assignees

• Chono Keiichi
• Senda Yuzo
• Tajime Junji
• Aoki Hirofumi
• Senzaki Kenta
• Nec Corp

Inventors

• Chono Keiichi
• Senda Yuzo
• Tajime Junji
• Aoki Hirofumi
• Senzaki Kenta

Classifications

• H04N19/593

  involving spatial prediction techniques · CPC title

• H04N19/176

  the region being a block, e.g. a macroblock · CPC title

• H04N19/156 Primary

  Availability of hardware or computational resources, e.g. encoding based on power-saving criteria · CPC title

• H04N19/503 Primary

  involving temporal prediction (adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109) · CPC title

• H04N19/13

  Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC] · CPC title