Coding method, apparatus, electronic device, and readable storage medium

By determining and fine-tuning the quantization parameters of the coding unit in the AV1 standard, the problem of mismatch between quantization parameters and quantization step size was solved, resulting in better coding performance.

CN116471405BActive Publication Date: 2026-07-24SHANGHAI BILIBILI TECH CO LTD
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Patent Information

Application Number
CN202310582182.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-22
Publication Date
2026-07-24
Estimated Expiration
2043-05-22

AI Technical Summary

Technical Problem

In the AV1 standard, the quantization parameters and quantization step size do not perfectly conform to an exponential function relationship, resulting in unsatisfactory encoding performance.

Method used

By determining the first quantization parameter of the coding unit, the target quantization step size is calculated using the quantization parameter-quantization step size function, and the corresponding second quantization parameter is matched by looking up the standard lookup table, so as to achieve fine-tuning of the quantization parameter and improve the coding effect.

Benefits of technology

It improves encoding performance, obtains more accurate quantization parameters for encoding, and enhances the encoding quality of images or videos.

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Abstract

The application provides an encoding method, device, electronic equipment and readable storage medium. The method comprises the following steps: determining a first quantization parameter of an encoding unit; determining a target quantization step according to the first quantization parameter and a quantization parameter-quantization step function; searching a standard comparison table according to the target quantization step to determine a second quantization parameter matched with the target quantization step; the standard comparison table comprises a corresponding relationship between a plurality of quantization steps and a plurality of quantization parameters; and encoding the encoding unit based on the second quantization parameter. In the embodiment of the application, after the target quantization step is obtained based on the estimated first quantization parameter and the quantization parameter-quantization step function, the second quantization parameter corresponding to the target quantization step is obtained by searching the standard comparison table, the fine adjustment of the quantization parameter is realized, and the second quantization parameter is used for encoding, so that the encoding effect of an image or a video is improved.
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