Method and apparatus for video encoding and decoding

By adding state syntax elements to the slice header, the problem in the JVET-Q0255 solution is solved, and the image header and slice header are merged is realized, saving codewords and simplifying image boundary detection, improving the efficiency and flexibility of video encoding standards.

CN115004710BActive Publication Date: 2025-03-18TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
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Patent Information

Application Number
CN202080093926.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-01-09
Filing Date
2020-09-24
Publication Date
2025-03-18
Estimated Expiration
2040-09-24

AI Technical Summary

Technical Problem

The JVET-Q0255 solution has several problems in the video encoding standardization process, including the use of valuable NAL unit types, the introduction of additional codeword pic_nal_type, limiting that each image can only have one slice, and the decoder can detect image boundaries without explaining how the decoder detects image boundaries.

Method used

These problems are solved by adding a state syntax element in the slice header, specifying whether there is an image header for an image that includes the slice. This scheme allows the labeling of slices in the NAL unit of the image and the merge of image head and slice headers without using additional NAL unit types.

Benefits of technology

This solution saves 4-bit codewords, avoids unnecessary slice limitations, and simplifies the image boundary detection process, improving the efficiency and flexibility of video encoding standards.

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Abstract

A method for decoding an image from a bitstream. In one embodiment, the method includes: receiving a slice header for a slice of an image, wherein the slice header includes a status syntax element; decoding (805) a status value from the status syntax element in the slice header, wherein a) if the status value is not equal to a first value, the status value indicates i) the bitstream includes an image header for the image, the image header including a set of image syntax elements, and ii) the slice header does not include the set of image syntax elements, and b) if the status value is equal to a first value, the status value indicates i) the slice header includes the set of image syntax elements, and ii) the bitstream does not include the image header for the image; and decoding the slice of the image using the set of image syntax elements.
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