Multiple Reference-Line Intra Prediction for Efficient Video Coding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video signal processing methods lack efficiency in coding, particularly in the use of transform kernels for video compression.
Innovation Solution
A method and device for video signal processing that utilizes intra prediction based on determining reference sample line indices and planar modes, generating MPM lists, and predicting blocks using angular modes, with specific processing steps for bitstream information handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reference lines are used for intra prediction, then prediction accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the reference sample lines into multiple distinct lines (first reference sample line, second reference sample line, etc.) and assigns different blocks to different reference lines based on their position and characteristics. This segmentation allows the system to use multiple reference lines for prediction without requiring complex processing of a single large reference set, thereby improving prediction accuracy while managing device complexity.
Solution Approach 2:
The patent applies different reference sample lines to different blocks based on local characteristics. Specifically, blocks in certain positions use the first reference sample line while blocks in other positions use the second reference sample line. This local quality approach ensures that each block uses the most appropriate reference line for its specific context, improving overall prediction accuracy without requiring all blocks to process all reference lines, thus managing device complexity.
2Productivity
If multiple reference lines are used for intra prediction, then coding efficiency is improved, but processing overhead increases
Solution Approach 1:
The patent performs preliminary actions by pre-organizing reference samples into multiple distinct reference sample lines before the actual prediction process. The reference sample lines are prepared and stored in advance, with each line containing pre-processed reference data. When prediction is needed, the system can directly access the appropriate pre-prepared reference line without performing additional complex processing, thereby improving coding efficiency while minimizing processing overhead during actual operation.
Data Source
AI summary
A video signal processing device comprises a processor configured to: obtain an index of intra prediction mode of a current block, obtain a reference sample line index for the current block, and generate a plurality of reference samples and a plurality of additional reference samples based on a direction of the intra prediction mode. The direction of the intra prediction mode is determined based on the index, and a number of the plurality of additional reference samples determined based on the reference sample line index and/or a ratio of a width of the current block and a height of the current block.