Video Coding with Intra TMP Fusion for Local Illumination Compensation
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Solution Overview
Problem
Existing video coding technologies, such as HEVC and VVC, face challenges in improving coding efficiency and performance, particularly in handling local illumination variations in video content.
Innovation Solution
Implementing local illumination compensation (LIC) parameters derived from previous coded video units to enhance video processing, including obtaining and applying LIC parameters during conversion processes to improve coding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional video coding technologies (HEVC, VVC) are used, then basic video compression is achieved, but coding efficiency and performance are insufficient due to inability to handle local illumination variations
Solution Approach 1:
The patent applies Local Illumination Compensation (LIC) parameters to adjust and compensate for illumination variations in different regions of video content. By deriving and applying LIC parameters (including linear model parameters and offset values) to modify pixel values in local regions, the coding system adapts to changing illumination conditions, thereby improving both coding efficiency and performance simultaneously
2Reliability
If LIC parameters are derived and applied to compensate for illumination variations, then coding performance is improved, but computational complexity increases
Solution Approach 1:
The patent performs preliminary derivation of LIC parameters during the encoding process, storing these parameters for subsequent use during decoding. By pre-computing and storing the illumination compensation parameters in the bitstream, the complex computational task is shifted to the encoding stage, allowing the decoder to apply pre-computed parameters with reduced complexity
Solution Approach 2:
The patent derives LIC parameters from previously coded video units and reuses these parameters for current video units with similar characteristics. By copying and reusing illumination compensation parameters from adjacent or similar regions, the system reduces redundant computations while maintaining coding performance
Data Source
AI summary
Embodiments of the disclosure provide a solution for video processing. A method for video processing is proposed. The method includes: deriving, for a conversion between a video unit of a video and a bitstream of the video, a prediction or reconstruction of the video unit based on one of: one or more intra template matching prediction (intra TMP) candidates, one or more intra prediction modes (IPMs), one or more reordered intra TMP candidates, or one or more reordered IPMs, and wherein the video unit is applied with a fusion of intra template matching prediction (intra TMP) mode and a coding tool; and performing the conversion based on the prediction or reconstruction of the video unit.