# US 11,310,510 B2 · Video encoding device, video decoding device, video encoding method, video decoding method, and program

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- Number: US 11,310,510 B2
- Document ID: US11310510B2
- Status: Granted
- Kind: B2
- Application number: 16/910,288
- Filed: 2020-06-24
- Published: 2020-10-08
- Granted: 2022-04-19
- Earliest claimed: 2010-11-26
- Assignees: NEC Corporation
- Applicants: NEC Corporation
- Inventors: Keiichi Chono; Yuzo Senda; Junji Tajime; Hirofumi Aoki; Kenta Senzaki
- Web page: https://patentgrep.com/patent/US11310510B2

## CPC

- H04N 19/156: Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
- H04N 19/12: Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
- H04N 19/172: the region being a picture, frame or field
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/184: the unit being bits, e.g. of the compressed video stream
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N 19/503: 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)
- H04N 19/593: involving spatial prediction techniques
- H04N 19/61: in combination with predictive coding
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A video decoding device and method, including extracting PCM block size information including a threshold, from a bitstream, determining the threshold based on the extracted PCM block size information; parsing a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold, controlling an entropy decoding process and a PCM decoding process based on the parsed PCM header; parsing transformed data of a prediction error data of an image in the bitstream; and PCM-decoding PCM data of the image in the bitstream, wherein the decoding performs the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold.

## Claims

### Claim 1

A video decoding device comprising:
one or more memories storing instructions; and
one or more processors configured to execute the instructions to:
extract PCM block size information from a bitstream, the PCM block size information indicating a threshold (pcmCodingUnitSize) to be used at a PCM header parsing process;
determine the threshold (pcmCodingUnitSize) based on the extracted PCM block size information;
parse a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold (pcmCodingUnitSize), the PCM header being information indicative of whether said encoded block is a block that has been encoded by PCM-encoding or not;
parse transformed data of a prediction error data of an image in the bitstream;
decode by PCM decoding PCM data of the image in the bitstream; and
control an entropy decoding process and a PCM decoding process based on the parsed PCM header,
wherein the one or more processors perform the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold (pcmCodingUnitSize).

### Claim 2

A video decoding method comprising:
extracting PCM block size information from a bitstream, the PCM block size information indicating a threshold (pcmCodingUnitSize) to be used at a subsequent PCM header parsing step;
determining the threshold (pcmCodingUnitSize) based on the extracted PCM block size information;
parsing a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold (pcmCodingUnitSize), the PCM header being information indicative of whether said encoded block is a block that has been encoded by PCM-encoding or not;
controlling an entropy decoding process and a PCM decoding process based on the parsed PCM header;
parsing transformed data of a prediction error 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,
wherein the decoding performs the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold (pcmCodingUnitSize).

### Claim 3

A non-transitory computer readable information recording medium storing a 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 (pcmCodingUnitSize) to be used at a subsequent PCM header parsing process;
determining the threshold (pcmCodingUnitSize) based on the extracted PCM block size information;
parsing a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold (pcmCodingUnitSize), the PCM header being information indicative of whether said encoded block is a block that has been encoded by PCM-encoding or not;
controlling an entropy decoding process and a PCM decoding process based on the parsed PCM header;
parsing transformed data of a prediction error 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,
wherein the decoding performs the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold (pcmCodingUnitSize).