Coding and decoding method, decoder, encoder, code stream and storage medium

CN120476599APending Publication Date: 2025-08-12GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
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Patent Information

Application Number
CN202380090663.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-01-11
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

In the video decoding process of Versatile Video Coding (VVC), there is a large difference between the quality of low-resolution decoded images and the quality of high-resolution decoded images, resulting in poor video encoding and decoding performance, especially in the inter-frame prediction and motion compensation processes. , the quality of the upsampled image is difficult to guarantee.

Method used

By parsing the code stream, the prediction mode, motion information and reference frame of the current block are determined. Based on the scaling factor and motion information, the reference area corresponding to the current block is determined from the reference frame. Based on the residual information and the reference area, reconstruction has a second The resolution block reduces the image quality inconsistency caused by the inconsistent resolution between the previous and later frames, and improves the video encoding and decoding performance.

Benefits of technology

By reconstructing the current block, the inconsistency in image quality caused by the inconsistency in resolution between previous and subsequent frames is reduced, the video encoding and decoding performance is improved, the alignment of high-resolution information and low-resolution images is ensured, and the quality of the resampling results is improved.

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Abstract

The embodiment of the invention discloses an encoding and decoding method, an encoder, a decoder, a code stream and a storage medium, and the method comprises the steps: analyzing the code stream, and determining a prediction mode, a first resolution and residual information of a current block; when the prediction mode indicates inter prediction, determining motion information and a reference frame of a current block; determining a scaling factor between the reference frame and the current frame based on the reference frame and the first resolution; determining a reference region corresponding to the current block from the reference frame based on the scaling factor and the motion information; determining a first reconstruction block with a second resolution corresponding to the current block based on the residual information and the reference region; wherein the first resolution ratio is smaller than the second resolution ratio.
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