Image encoding / decoding method and device, and recording medium having bitstream stored therein

The defined SEI processing order for display overlay information messages in video encoding and decoding technologies addresses the unclear processing order issue, improving efficiency in forming target display pictures for high-resolution videos.

WO2026147284A1PCT designated stage Publication Date: 2026-07-09LG ELECTRONICS INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LG ELECTRONICS INC
Filing Date
2026-01-05
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing video encoding and decoding technologies face challenges in managing the unclear processing order of multiple display overlay information messages, leading to inefficiencies in forming target display pictures.

Method used

A method and apparatus are developed to manage display overlay information (DOI) messages through a defined SEI processing order (SPO) SEI message, allowing for the selection and ordering of DOI messages to form a target display picture, and encoding these messages in a network abstraction layer (NAL) unit of the bitstream.

Benefits of technology

This approach ensures clear processing and application order of display overlay information messages, enhancing the efficiency of video encoding and decoding processes, particularly for high-resolution and high-quality video formats.

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Abstract

An image decoding method and device according to the present disclosure may: receive a bitstream comprising an encoded video picture; and reconstruct the encoded video picture included in the bitstream. Here, the bitstream may comprise a plurality of display overlay information (DOI) supplemental enhancement information (SEI) messages having different DOI SEI identifiers related to the encoded video picture. On the basis that the plurality of DOI SEI messages are included in an SEI processing order (SPO) SEI message, the processing order of the plurality of DOI SEI messages may be defined by the SPO SEI message.
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