Image Bitstream Decoding With SEI-Guided Leading Picture Order
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images leads to a significant increase in transmission and storage costs due to the rise in the amount of transmitted information, necessitating high-efficient image compression technology.
Innovation Solution
An image encoding/decoding method that identifies and manages leading pictures, including decodable and non-decodable leading pictures, through supplemental enhancement information (SEI) messages, allowing for improved encoding/decoding efficiency and flexible decoding orders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution and high-quality images are transmitted, then image quality is improved, but transmission cost and storage cost increase
Solution Approach 1:
The patent segments the image data into different types of pictures (leading pictures and non-leading pictures) and applies different encoding strategies to each segment. Leading pictures are encoded with higher quality while non-leading pictures use lower quality, allowing selective transmission that maintains image quality where needed while reducing overall data volume
Solution Approach 2:
The patent applies local quality by differentiating the encoding quality based on picture type and position. High quality encoding is applied locally to leading pictures that require it, while standard or reduced quality is applied to non-leading pictures, optimizing the balance between image quality and transmission cost
2Productivity
If leading pictures are identified and managed through SEI messages, then encoding/decoding efficiency is improved, but device complexity increases
Solution Approach 1:
The patent introduces SEI messages as intermediary elements that carry leading picture identification information between the encoder and decoder. These messages act as mediators that enable efficient picture management without requiring complex direct coordination between encoding and decoding operations
Solution Approach 2:
The patent applies preliminary action by identifying and marking leading pictures before the actual encoding/decoding process begins. The SEI messages are inserted in advance to provide necessary instructions, allowing the decoding system to prepare appropriately and process pictures more efficiently without increasing operational complexity
3Adaptability or versatility
If a mixture of decodable and non-decodable leading pictures is allowed, then flexibility is improved, but decoding complexity increases
Solution Approach 1:
The patent applies dynamics by allowing the decoding system to adapt its behavior based on the picture type indicated in SEI messages. The decoder can dynamically adjust its processing strategy depending on whether a picture is marked as decodable or non-decodable, enabling flexible handling of different picture types without requiring a completely complex unified processing system
Data Source
AI summary
An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium for storing a bitstream are provided. The image decoding method according to the present disclosure may be an image decoding method performed by an image decoding device, the method comprising the steps of: obtaining a supplemental enhancement information (SEI) message for an extended dependent random access point (EDRAP) picture from a bitstream, and on the basis of the SEI message, identifying a leading picture following the EDRAP picture in the decoding order and preceding the EDRAP picture in the output order, wherein the leading picture comprises at least one of a decodable leading picture and an undecodable leading picture.