Encoding and decoding methods, encoder, decoder, and storage medium
By determining the virtual intra-frame prediction mode and transform set based on the size information of the current block, the problem of unsuitable transform kernel selection in the prior art is solved, thereby improving the compression efficiency of video encoding and decoding and the ability to process complex image content.
WO2026137128A1PCT designated stage Publication Date: 2026-07-02GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
- Filing Date
- 2024-12-23
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Existing video coding technologies have room for improvement in the compression efficiency of transform techniques in high-resolution video compression, especially in the case of complex and variable image content where it is difficult to adaptively select a suitable transform kernel.
Method used
The virtual intra-frame prediction mode is determined based on the size information of the current block, and then an adaptive transform set and transform kernel are selected to optimize the transform process.
Benefits of technology
It improves the compression efficiency of video encoding and decoding, and enhances the ability to process complex and ever-changing image content.
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Smart Images
Figure CN2024141529_02072026_PF_FP_ABST
Abstract
Embodiments of the present application disclose encoding and decoding methods, an encoder, a decoder, and a storage medium. The decoding method comprises: on the basis of size information of a current block, determining a virtual intra-frame prediction mode for the current block; on the basis of the virtual intra-frame prediction mode of the current block, determining a corresponding transform set; on the basis of the transform set, determining a transform kernel of the current block; and on the basis of the transform kernel, transforming an inverse quantization coefficient of the current block, and determining a residual sample of the current block.
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