Subpicture Signaling in Image Encoding Parameter Sets

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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 large amount of information required, necessitating the development of high-efficient image compression technologies.

Innovation Solution

An image encoding/decoding method and apparatus that efficiently signal subpicture information by determining whether a subpicture identifier is signaled using a picture parameter set, allowing for improved encoding/decoding efficiency and effective transmission of bitstreams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If high-resolution and high-quality image data are transmitted, then image quality is improved, but transmission cost and storage cost increase

Engineering Contradiction:

Improveimage qualityVSAvoidtransmission cost and storage cost

Core Design Contradiction:

Manufacturing precisionVSQuantity of substance

Solution Approach 1:

The current picture is divided into multiple subpictures, each with its own parameter set. This segmentation allows for more granular and efficient compression by applying different encoding parameters to different regions, reducing the overall bitstream size while maintaining high image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different parameter sets are applied to different subpictures based on their specific characteristics. This allows each subpicture to be encoded with locally optimized parameters, improving overall compression efficiency while maintaining high quality where needed.

Inventive Principle:

Principle #3Local quality

2Productivity

If subpicture information is signaled using picture parameter set, then encoding/decoding efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveencoding/decoding efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The picture parameter set is prepared in advance with subpicture information before the actual encoding/decoding process. This preliminary preparation allows the decoder to efficiently process subpictures without requiring complex real-time calculations, improving encoding/decoding efficiency while managing device complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The picture parameter set serves multiple functions: it contains both general picture parameters and specific subpicture information. This multi-functionality reduces the need for separate parameter structures, improving efficiency without proportionally increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250024062A1Method and device for encoding/decoding image using sub-picture, and bit stream transmission method

Publication Date: 2025.01.16 LG ELECTRONICS INC

AI summary

An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise obtaining, from a picture parameter set, a first signaling flag specifying whether an identifier of a subpicture splitting a current picture is signaled using the picture parameter set, obtaining identifier information of the subpicture from the picture parameter set, based on the first signaling flag specifying that the identifier of the subpicture is signaled using the picture parameter set, and decoding the current picture by decoding a current subpicture identified based on the identifier information.