Video Coding Slice Signaling Within Tiles for Lower Bitstream Overhead
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images/videos, particularly in virtual reality and augmented reality, leads to higher data transmission and storage costs due to the increased amount of information required, necessitating a more efficient compression technique.
Innovation Solution
A method and apparatus for coding images/videos that enhance coding efficiency by explicitly signaling slice information within a tile, reducing signaling overhead, and optimizing the number and height of slices within a tile, especially when multiple slices have the same height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution and high quality image/video are transmitted, then image/video quality is improved, but transmission and storage costs increase due to increased amount of information
Solution Approach 1:
The patent changes the parameter of compression efficiency by introducing adaptive slice partitioning and variable-length coding techniques. The system dynamically adjusts coding parameters based on image characteristics, achieving higher compression ratios that reduce the amount of information while maintaining quality.
Solution Approach 2:
The patent segments the image into multiple slices with different coding characteristics. By dividing the image into slices and applying different compression techniques to each, the system optimizes the balance between compression efficiency and quality preservation.
2Productivity
If slice information is explicitly signaled within a tile, then coding efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial signaling by only explicitly signaling slice information when necessary. The system uses a flag to indicate whether slice height information is present, avoiding redundant signaling while maintaining coding efficiency when needed.
Solution Approach 2:
The patent changes the signaling parameter by using variable-length coding and adaptive syntax. The system adjusts the amount of signaling based on the actual need, using fewer bits when slice configurations are simple and more bits only when complexity requires it.
3Productivity
If number and height of slices within a tile are optimized, then compression efficiency is improved, but complexity of slice configuration increases
Solution Approach 1:
The patent introduces dynamic slice configuration where the number and height of slices are adaptively determined based on image content and coding requirements. The system can dynamically adjust slice parameters during encoding to optimize compression efficiency without manual configuration complexity.
Solution Approach 2:
The patent implements self-service configuration where the encoder automatically determines optimal slice parameters without external intervention. The system uses built-in analysis of image characteristics to autonomously configure slice numbers and heights, reducing configuration complexity.
Data Source
AI summary
A video decoding method performed by a video decoding apparatus, according to the present document, may comprise the steps of: parsing, from a bitstream, number information about the number of slices having heights specifically signaled within a tile of a current picture; on the basis of the number information, parsing, from the bitstream, height information about the heights of the slices having the specifically signaled heights; deriving the number of slices within the tile on the basis of the number information and the height information; generating prediction samples by performing at least one of intra prediction and inter prediction on a current block of the current picture on the basis of the slices within the tile; and generating reconstructed samples on the basis of the prediction samples.