High level syntax for video layers

The use of layer parameter sets and video parameter sets in the bitstream addresses the challenge of asynchronous metadata delivery in video coding, enhancing decoding efficiency and reducing bit overhead.

WO2026117348A1PCT designated stage Publication Date: 2026-06-04TENCENT AMERICA LLC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TENCENT AMERICA LLC
Filing Date
2025-10-31
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing video coding technologies face challenges in efficiently conveying metadata related to video coding standards, particularly in scenarios where parameter sets and supplemental enhancement information are not delivered simultaneously with the coded picture data, leading to potential decoding errors and increased bit costs.

Method used

The introduction of a high-level syntax structure that includes layer parameter sets (LPS) and video parameter sets (VPS) within the bitstream, allowing for asynchronous delivery of essential and non-essential metadata, such as SEI messages and VUI information, to enhance decoding efficiency and reduce bit overhead.

Benefits of technology

This approach enables robust and efficient video decoding by ensuring that all necessary metadata is accurately conveyed, reducing decoding errors and minimizing bitstream size, thereby improving the overall video coding process.

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Abstract

Some aspects of the disclosure provide a first method of video decoding. In an example, a bitstream is received. The bitstream includes coded information of one or more pictures, the coded information of the one or more pictures is structured into one or more coded layer video streams. From a first coded layer video stream in the one or more coded layer video streams, a first identifier that identifies a first layer parameter set (EPS) is parsed. The first layer parameter set includes a first set of syntax elements for decoding at least the first coded layer video stream in the one or more coded layer video streams, the first layer parameter set includes the first identifier identifying the first layer parameter set and a second identifier identifying a video parameter set (VPS) that is referred to by the first layer parameter set.
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