Video Decoder Prediction Mode Combinations for Lower Bitstream Overhead
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Solution Overview
Problem
Existing video coding technologies face increased encoding costs due to the need to transmit more information when using multiple prediction modes, which compromises compression efficiency.
Innovation Solution
A video decoding method that utilizes a first combination of a first weight derivation mode and K first prediction modes to predict a current-component block, and a video encoding method that determines a similar combination for efficient prediction, where K is a positive integer greater than 1, allowing for improved prediction without excessive information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple prediction modes are used to predict a current block, then prediction effect is improved, but encoding cost increases
Solution Approach 1:
The patent applies dynamics by making the prediction mode selection adaptive rather than static. The encoder dynamically chooses between single prediction mode and multiple prediction modes based on block characteristics, allowing the system to optimize between prediction accuracy and encoding cost for different blocks
Solution Approach 2:
The patent changes the parameter of prediction mode quantity from fixed to variable. By introducing a mechanism to select between one or multiple prediction modes based on block complexity and content characteristics, the system adjusts the prediction approach to balance accuracy improvement against bitstream overhead
2Measurement precision
If multiple prediction modes are used to predict a current block, then prediction effect is improved, but compression efficiency decreases
Solution Approach 1:
The system dynamically adjusts the number of prediction modes used based on the specific block being encoded. For simple blocks, a single prediction mode suffices, while for complex blocks, multiple modes are employed, thereby maintaining compression efficiency while improving prediction accuracy where needed
Solution Approach 2:
The patent modifies the operational parameter of prediction mode count from a constant value to a variable that changes based on block characteristics. This allows the encoder to achieve better compression efficiency by avoiding unnecessary multiple prediction modes for blocks that don't require them
Data Source
AI summary
A video coding method and apparatus are provided. In the disclosure, a first weight derivation mode and K first prediction modes are taken as a combination, so that the first weight derivation mode and the K first prediction modes are indicated in the form of a combination.