Video Decoding Split Mode Determination for Complexity Reduction
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Solution Overview
Problem
Current video coding technologies face complexity in determining optimal split modes for picture blocks, leading to increased calculation complexity and inefficiency in video decoding processes.
Innovation Solution
A method that determines whether a split mode is available for a current picture block, allowing for the avoidance of transmitting split mode information in the bitstream, thereby improving coding efficiency and reducing calculation complexity by selecting from optional split modes such as non-split, horizontal binary tree, vertical binary tree, horizontal extended quadtree, vertical extended quadtree, and quadtree modes based on specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rate-distortion costs for multiple split modes are calculated to determine optimal split mode, then picture quality is improved, but calculation complexity increases excessively
Solution Approach 1:
The patent extracts and removes the split mode information from the bitstream transmission, determining split modes based on block characteristics and context rather than transmitting explicit mode indicators. This reduces the complexity of calculating and transmitting rate-distortion costs for multiple split modes while maintaining picture quality through implicit mode selection based on block size and position.
Solution Approach 2:
The patent performs preliminary determination of available split modes based on block characteristics (size, position, type) before actual coding. By pre-filtering which split modes are applicable based on block properties, the system avoids calculating rate-distortion costs for impossible or suboptimal modes, reducing overall calculation complexity while ensuring optimal quality through targeted optimization.
2Measurement precision
If split mode information is transmitted in bitstream for each picture block, then decoding accuracy is improved, but coding efficiency decreases
Solution Approach 1:
The patent extracts essential split mode information from explicit bitstream transmission and replaces it with implicit determination based on block characteristics. Instead of transmitting detailed mode indicators for each block, the system uses block size, position, and type information to infer the appropriate split mode, maintaining decoding accuracy while significantly improving coding efficiency by reducing bitstream data.
Solution Approach 2:
The patent enables the decoding system to self-determine split modes based on inherent block characteristics without requiring explicit mode information in the bitstream. The decoder uses its own analysis of block properties (size, position, type) to automatically select appropriate split modes, eliminating the need for complex mode signaling and improving overall coding efficiency.
3Manufacturing precision
If multiple split modes are evaluated for each picture block, then picture quality is optimized, but decoding time increases
Solution Approach 1:
The patent performs preliminary filtering of split modes based on block characteristics before quality optimization. By pre-determining which split modes are available and appropriate for each block based on size, position, and type, the system eliminates unnecessary rate-distortion cost calculations for impossible modes, reducing decoding time while maintaining optimized picture quality through targeted evaluation of only relevant modes.
Solution Approach 2:
The patent applies partial evaluation by only calculating rate-distortion costs for a subset of plausible split modes rather than all possible modes. Based on block characteristics, the system identifies and evaluates only the most likely appropriate split modes (e.g., quadtree for certain block sizes, binary tree for others), avoiding excessive calculations while still achieving optimal quality through sufficient mode evaluation.
Data Source
AI summary
A video decoding method includes: obtaining block information of a current picture block; determining, based on the block information, whether a split mode of a set of optional split modes is available; determining a split mode of the current picture block from a determined available split mode; obtaining at least one coding unit (CU) from the current picture block based on the split mode of the current picture block, and parsing a bitstream including the current picture block, to obtain decoding information of the at least one CU, and decoding the at least one CU based on the decoding information, to obtain a reconstructed block.