Probability table updating apparatus and updating method, medium, and terminal

By using a probability table update device and method, and utilizing pre-frame adaptation and post-frame adaptation modules and a state machine, the forward and backward updates of the probability table are realized. This solves the bandwidth pressure and efficiency problems caused by the interaction between hardware and software in the video decoder, and improves the processing speed and adaptability of the decoder.

WO2026112799A1PCT designated stage Publication Date: 2026-06-04VERISILICON MICROELECTRONICS (SHANGHAI) CO LTD +5
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
VERISILICON MICROELECTRONICS (SHANGHAI) CO LTD
Filing Date
2024-11-26
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

The frequent hardware and software interactions that update the probability table in existing video decoders lead to increased bandwidth pressure and reduced decoder efficiency, making it impossible to process multi-frame images quickly.

Method used

By employing a pre-frame adaptation process module and a post-frame adaptation update module, combined with a state machine and SRAM memory, the forward and backward adaptation updates of the probability table are realized, reducing software and hardware interaction and dynamically adjusting the probability table to adapt to different data characteristics.

Benefits of technology

It reduces bandwidth pressure, improves the efficiency and throughput of the decoder, and can independently and quickly process multiple frames of images to meet independent decoding needs.

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Abstract

The present application provides a probability table updating apparatus and updating method, a medium, and a terminal. The apparatus comprises a pre-frame adaptive process module, an entropy decoding module, and a post-frame adaptive update module. The pre-frame adaptive process module executes a forward adaptive update process on an original probability table before decoding starts, to generate a new probability table. A hardware updating design method is used to reduce the number of software and hardware interactions in a video decoding process, thereby reducing bus bandwidth pressure. The entropy decoding module performs a decoding operation on a current image frame on the basis of the new probability table, and calculates the number of times of decoding syntax elements corresponding to probability table elements in the decoding process, so as to perform a backward adaptive update process. The post-frame adaptive update module performs the backward adaptive update process on the basis of the original probability table and the number of times of decoding the syntax elements corresponding to the probability table elements. Use of hardware to decode forward and backward update processes of a probability table not only improves the adaptability of a decoder to different data features, making the decoder more widely applied to various decoding scenarios, but also improves decoding efficiency.
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