Video coding method, system and device

Abstract

The invention discloses a video coding method, system and device, and belongs to the technical field of video coding, and the method comprises an inter-frame prediction method: in view that a reference depth and a reference cost reflect the correlation between a current pixel block and an upstream adjacent pixel block, determining the optimal division depth of the current pixel block through the correlation, to reduce division complexity of the quadtree; and in combination with the type, the reference depth and the reference cost of the current pixel block, skipping some unnecessary inter-frame prediction modes, and selecting the optimal prediction mode from a corresponding list, so that the calculation amount caused by traversing all model rate distortion cost calculation is reduced, the calculation amount in the video coding process is reduced, and the coding efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a video coding method, system and device. Background technique [0002] Screen video is a video displayed on the screen by electronic products such as computers, TVs, mobile phones, and tablets. Screen video has been widely used in the field of office and monitoring, such as remote training video, desktop sharing, desktop collaboration, screen recording of monitoring video, etc. [0003] The HEVC / H.265 encoding structure uses a quadtree structure and a larger coding unit (CU), such as image 3 As shown, the computational complexity of the encoder is significantly increased, and the encoding time is difficult to meet the real-time requirements. In order to improve compression efficiency, the H.265 encoder has a more flexible pixel block (CU) division method. Each frame of image is first divided into LCUs of 64×64 size in sequence. Starting from LCU, the coded depth ...

AI Technical Summary

Problems solved by technology

Taking the 64×64 LCU as an example, the prediction mode needs to be traversed 1662-2216 times. The calculation complexity of the prediction mode selection in the entire video encoding process is extremely high. Obviously, this traversal calculation process makes the calculation complexity of the encoding end very high. Video compression The encoding time consumed is long, which cannot meet the growing demand for real-time video compression

[0005] It can be seen that the prediction process of HEVC / H.265 introduces a lot of computational complexity, how to effectively reduce the computational complexity of video encoding has become an urgent problem to be solved

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