Rectangular Slice Partitioning Signaling in Video Coding

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Solution Overview

Problem

Existing video coding technologies face challenges in efficiently signaling slice partitioning in coded video streams, which affects compression efficiency and bandwidth utilization.

Innovation Solution

A method for coding video data that involves receiving video data with subpictures, signaling the number of subpictures and a delta value to derive the number of rectangular slices, thereby optimizing slice partitioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional video coding technologies are used for signaling slice partitioning, then the signaling process is simple, but compression efficiency is reduced and bandwidth utilization is poor

Engineering Contradiction:

Improvecompression efficiencyVSAvoidsignaling complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The picture is divided into multiple rectangular slices with different aspect ratios, allowing each slice to be independently coded and optimized. This segmentation enables more flexible partitioning of the video content, improving compression efficiency by adapting to different scene characteristics in different regions of the picture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces aspect ratio as an additional dimension for slice partitioning. Instead of only dividing the picture horizontally or vertically, slices can have different aspect ratios, adding a new degree of freedom to the partitioning process. This enables more efficient representation of video content with varying spatial characteristics.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If flexible slice partitioning is implemented, then compression efficiency is improved, but bandwidth requirements increase due to additional signaling information

Engineering Contradiction:

Improvebandwidth utilizationVSAvoidsignaling data volume

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent combines multiple slice partitioning parameters into a unified signaling mechanism. By merging the aspect ratio information with the slice configuration data, the total signaling overhead is reduced compared to separately signaling each parameter. This merging approach maintains flexible partitioning while optimizing bandwidth utilization.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If rectangular slice partitioning with different aspect ratios is used, then video streaming performance is improved, but the signaling mechanism becomes more complex

Engineering Contradiction:

Improvevideo streaming performanceVSAvoidsignaling mechanism complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent changes the parameter representation by using aspect ratio values to define slice dimensions. Instead of signaling absolute width and height for each slice, the system uses relative aspect ratio parameters, which reduces the complexity of the signaling mechanism while maintaining the ability to define flexible rectangular partitions with improved video streaming performance.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250142125A1Method for signaling rectangular slice partitioning in coded video stream

Publication Date: 2025.05.01 TENCENT AMERICA LLC

AI summary

A method, computer program, and computer system is provided for coding video data. Video data including one or more subpictures is received. A number of the subpictures and a delta value between the number of subpictures and a number of rectangular slices are signaled. The number of rectangular slices is derived based on the number of subpictures and the delta value.