Slice header constraints for concatenated pictures

CN115362680BActive Publication Date: 2025-08-29DOUYIN CO LTD
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Patent Information

Application Number
CN202180026759.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-03-30
Filing Date
2021-03-30
Publication Date
2025-08-29
Estimated Expiration
2041-03-30

AI Technical Summary

Technical Problem

The existing VVC standards have redundant and inefficient problems in co-arranged picture signaling and reference picture management, including co-arranged picture signaling inconsistency, redundant resolution and scaling window offset constraints, lack of flexibility in strip-level signaling, and LMCS signaling inefficiency.

Method used

By optimizing the signaling mechanism of the collocated pictures, allowing the collocated pictures from reference picture list 1, simplifying resolution and scaling window offset constraints, introducing SPS and PPS flags to skip unnecessary syntax elements, optimizing LMCS signaling, ensuring flexibility and efficiency of stripe-level signaling.

Benefits of technology

Improves the efficiency and consistency of the video encoding and decoding process, reduces redundant bitstreams, and improves the performance of video encoder and decoder.

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Abstract

Methods, apparatus, and systems for video encoding and decoding are described, including conforming to constraints on collocated pictures. One example method of video processing includes performing conversion between a video including a current picture and a bitstream of the video, the current picture including a slice, wherein the bitstream conforms to a format rule that specifies that a slice header associated with the slice includes one or more constraints on collocated pictures, and wherein the one or more constraints specify a variable that indicates disabling a reference picture resampling process for the collocated picture.
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