Residual Block Intra Prediction for Lower Video Coding Bitrate
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Solution Overview
Problem
Existing video coding technologies face challenges in efficiently reducing redundancy in residual signals, leading to suboptimal compression efficiency and increased bandwidth requirements.
Innovation Solution
Implementing a line-by-line residual domain prediction mode for intra prediction, generating a refined residue block, and signaling the refined residue block in the video bitstream to reduce redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional intra prediction methods are used, then video coding can be performed with standard complexity, but the residual signals contain significant redundancy leading to increased bit rate requirements
Solution Approach 1:
The patent segments the residual signal processing into multiple stages: first generating an initial residue block through conventional intra prediction, then applying a second short-distance intra prediction specifically to the residue block. This segmentation allows targeted reduction of redundancy in the residual domain without requiring complete reprocessing of the entire video signal, thereby reducing bit rate while controlling complexity increment.
Solution Approach 2:
The patent performs preliminary residue prediction by generating the residue block before final encoding. By predicting the residue block using short-distance intra prediction and encoding the difference between the actual residue and predicted residue, the system prepares optimized residual data in advance, reducing the information that needs to be transmitted and stored.
2Productivity
If advanced residue prediction technologies are applied, then compression efficiency can be improved, but the coding complexity and processing requirements increase
Solution Approach 1:
The patent applies different prediction strategies to different domains: conventional intra prediction for the original video block and short-distance intra prediction specifically for the residue block. This localized approach optimizes compression efficiency for residual signals without requiring advanced processing throughout the entire coding pipeline, thereby improving compression efficiency while limiting the spread of complexity.
3Reliability
If residual signals are encoded with high precision, then video quality can be maintained, but the number of bits required for transmission increases
Solution Approach 1:
The patent introduces an intermediary prediction step where the residue block is predicted using short-distance intra prediction. This intermediary predicted residue block serves as a reference, and only the difference between the actual residue and predicted residue needs to be encoded. This mediator approach maintains video quality by preserving necessary residual information while significantly reducing the number of bits required for transmission.
Data Source
AI summary
An example method of video coding includes receiving video data comprising a plurality of blocks, including a first block that is to be encoded in an intra prediction mode. The method also includes generating a residue block for the first block by applying the intra mode prediction to the first block, and generating a refined residue block for the first block by applying a short distance intra prediction to the residue block. Systems and storage mediums for storing and/or executing instructions for performing the example method are also disclosed.