Content-Adaptive CIBCIP for Video Coding Efficiency
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Solution Overview
Problem
Existing video coding technologies face challenges in improving coding efficiency and performance, particularly in handling various video content types.
Innovation Solution
The proposed solution involves applying a combination of intra block copy (IBC) and intra prediction (CIBCIP) to video units, obtaining IBC and intra predicted signals, combining them to derive a prediction, and using this prediction for video unit conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional video coding techniques (MPEG-2, MPEG-4, AVC, HEVC) are used, then video compression is achieved, but coding efficiency and performance are insufficient
Solution Approach 1:
The patent combines intra block copy (IBC) and intra prediction (IP) into a unified CIBCIP framework. The encoder selectively applies IBC, IP, or their combination based on content characteristics, merging the strengths of both techniques to improve coding efficiency and performance simultaneously
2Measurement precision
If a combination of intra block copy and intra prediction is applied to video units, then prediction accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent implements dynamic mode selection where the encoder adaptively chooses between IBC, IP, or CIBCIP based on rate-distortion optimization. This dynamic approach allows the system to achieve high prediction accuracy when needed while avoiding unnecessary computational complexity for simpler content
Solution Approach 2:
The patent applies different prediction techniques to different regions of the video content based on local characteristics. IBC is applied to regions with repetitive patterns, IP to regions with smooth gradients, and CIBCIP where both techniques benefit the prediction, optimizing the balance between accuracy and complexity
3Reliability
If video coding techniques are improved to handle various video content types, then coding performance increases, but bitrate requirements may increase
Solution Approach 1:
The patent changes the prediction parameter selection based on content type. By dynamically adjusting which prediction mode (IBC or IP) and what specific parameters are used for different video content types, the system achieves high coding performance while maintaining efficient bitrate utilization through content-adaptive parameter optimization
Data Source
AI summary
Embodiments of the disclosure provide a solution for video processing. A method for video processing is proposed. The method includes: determining, for a conversion between a video unit of a video and a bitstream of the video, whether to apply a combination of intra block copy (IBC) and intra prediction (CIBCIP) to the video unit; in accordance with a determination that a combination of intra block copy (IBC) and intra prediction (CIBCIP) is applied to the video unit, obtaining an intra block copy (IBC) predicted signal of the video unit; obtaining an intra predicted signal of the video unit; deriving a prediction of the video unit by combining the IBC predicted signal and the intra predicted signal; and performing the conversion based on the prediction of the video unit.