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Image data encoding and decoding

A technology of image data and encoding, applied in the field of image data encoding and decoding

Pending Publication Date: 2022-02-01
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present disclosure solves or alleviates the problems caused by the processing

Method used

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  • Image data encoding and decoding
  • Image data encoding and decoding
  • Image data encoding and decoding

Examples

Experimental program
Comparison scheme
Effect test

example 2-SE

[0223] Coding Example 2 - SEI Semantics

[0224] D.3.8 Sub-picture level information SEI message semantics

[0225] A requirement for bitstream consistency is that the general_tier_flag extracted from the j-th subgraph of j in the range 0 to sps_num_subpics_minus1 (inclusive) and conforming to i in the range 0 to num_ref_level_minus1 (inclusive) is equal to Bitstreams of profiles with level 0 and equal to ref_level_idc[i] shall obey the following constraints for each bitstream conformance test specified in Annex C:

[0226] Ceil(256*SubPicSizeY[j]÷RefLevelFraction[i][j]) shall be less than or equal to MaxLumaPs, where MaxLumaPs is specified in Table A.1;

[0227] The value of Ceil(256*(subpic_width_minus1[j]+1)÷RefLevelFraction[i][j]) should be less than or equal to Sqrt(MaxLumaPs*8);

[0228] The value of Ceil(256*(subpic_height_minus1[j]+1)÷RefLevelFraction[i][j]) should be less than or equal to Sqrt(MaxLumaPs*8);

[0229] The value of SubPicNumTileCols[j] shall be less t...

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Abstract

Image data encoding apparatus comprises an entropy encoder for selectively encoding data items representing image data to be encoded by a first, context adaptive binary arithmetic coding (CABAC), encoding system or by a second, bypass, encoding system, so as to generate encoded binarized symbols; the image data representing one or more pictures of a picture sequence, each picture comprising two or more output data units representing respective sub-sections of the picture, each sub-section being decodable and reconstructable independently of other sub-sections in that picture and picture sequence; in which each sub-section is subject to a respective minimum compression ratio.

Description

technical field [0001] The present disclosure relates to image data encoding and decoding. Background technique [0002] The "Background" description provided herein is for the purpose of generally presenting the context of the disclosure. To the extent described in this Background section, the work of the presently named inventors and aspects of the description that may not be prior art at the time of filing are neither expressly nor implicitly admitted to be prior art with respect to the present disclosure . [0003] There are several video data encoding and decoding systems that involve converting the video data into a frequency-domain representation, quantizing the frequency-domain coefficients, and then applying some form of entropy coding to the quantized coefficients. This enables compression of video data. Appropriate decoding or decompression techniques are applied to recover the reconstructed version of the original video data. [0004] High Efficiency Video Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/13H04N19/167H04N19/174H04N19/436
CPCH04N19/13H04N19/167H04N19/174H04N19/436H04N19/91H04N19/14H04N19/146H04N19/188
Inventor 斯蒂芬·马克·基廷卡尔·詹姆斯·沙曼阿德里安·理查德·布朗
Owner SONY CORP