Multi-phase cross component prediction
By employing cross-component intra prediction in video coding, the method effectively addresses the challenge of compressing video data across color components, achieving improved compression efficiency and video quality.
WO2025058640A1 Publication Date: 2025-03-20TENCENT AMERICA LLC
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Patent Information
- Application Number
- PCT/US2023/036531
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-10-30
- Filing Date
- 2023-10-31
- Publication Date
- 2025-03-20
AI Technical Summary
Technical Problem
Existing video coding technologies face challenges in efficiently compressing video data across different color components, particularly in maintaining video quality while reducing bandwidth and storage requirements.
Method used
The implementation of cross-component intra prediction (CCIP) in video coding, where samples of a first color component are determined based on samples of a second color component using linear or nonlinear functions, with parameters derived from reconstructed samples or explicitly signaled in the video bitstream.
Benefits of technology
This approach enhances video compression efficiency by accurately predicting samples across different color components, thereby improving compression ratios while maintaining acceptable video quality.
✦ Generated by Eureka AI based on patent content.
Abstract
The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current coding block of an image frame and includes a cross-component intra prediction mode. A computing system identifies a sample of the first color component and a sample of the second color component co-located with the sample of the first color component. At least two adjacent samples of the second color component are identified, and a location of each adjacent sample is identified by a horizonal delta coordinate value or a vertical delta coordinate value with respect to the sample of the second color component. The computing system generates the sample of the first color component based on the at least two adjacent samples of the second color component, and reconstructs the current coding block based at least on the generated sample of the first color component.
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