Picture Division Structure for Low-Overhead Slice Signaling
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Solution Overview
Problem
The increasing demand for high resolution and high quality images/videos, such as 4K and 8K Ultra High Definition, leads to higher data transmission and storage costs, and existing technologies struggle to efficiently compress and deliver these high-quality images/videos, especially for virtual reality and augmented reality content.
Innovation Solution
A method and apparatus for improving the coding efficiency of images/videos by efficiently signaling information on slices within a tile, reducing signaling overhead, and effectively delivering information related to the number and height of slices within a tile, using a video decoding method that parses number and height information from a bitstream and decodes the image/video based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution and high quality image/video data are transmitted, then image/video quality is improved, but transmission and storage costs are increased
Solution Approach 1:
The picture is divided into multiple tiles, and each tile is further divided into multiple slices. This hierarchical segmentation allows for efficient processing and compression of large high-resolution images by breaking them into manageable units, reducing the overall data volume while maintaining quality
Solution Approach 2:
The patent changes the signaling parameters for slice information by introducing a difference value representation method. Instead of signaling absolute slice row positions, the patent uses difference values between consecutive slice positions, which reduces the number of bits required to represent slice information while maintaining the ability to reconstruct the original picture structure
2Measurement precision
If slice information is explicitly signaled for each slice, then decoding accuracy is improved, but signaling overhead is increased
Solution Approach 1:
Instead of signaling absolute slice position information directly, the patent inverts the approach by signaling the difference value between consecutive slice positions. This inversion transforms the problem from signaling large absolute values to signaling small difference values, reducing signaling overhead while maintaining decoding accuracy
Solution Approach 2:
The patent changes the parameter representation from absolute slice row positions to difference values. This parameter transformation reduces the bit depth required for signaling while preserving the ability to accurately reconstruct slice positions during decoding
Data Source
AI summary
A video decoding method performed by a video decoding apparatus according to the present document comprises: parsing number information about the number of slices for which height is explicitly signaled in a tile of a current picture from a bitstream; parsing height information about the height of the slices for which height is explicitly signaled from the bitstream based on the number information; and decoding the current picture based on the number information and the height information.