Video coding method, device, system and computer readable storage medium

Abstract

The invention discloses a video coding method, a device, a system and a computer readable storage medium. The method comprises the steps: dividing a current block in a mode of dividing time-space domain adjacent blocks of the current block, and obtaining a plurality of current sub-blocks; classifying the plurality of current sub-blocks according to the information and / or guidance information of the plurality of current sub-blocks; calculating a quantization parameter offset value of each current sub-block by utilizing the classification condition of the plurality of current sub-blocks; obtaining a quantization parameter of the current frame, and obtaining the quantization parameter of the current sub-block through the quantization parameter of the current frame and the quantization parameter offset value of the current sub-block; and encoding the current frame by using the quantization parameters of all the current sub-blocks to obtain a code stream of the current frame. According to the method and the device, the coding block is divided downwards into smaller blocks to calculate the quantization parameter, so that the rationality of the coding size of each coding block in the video frame is improved, and the overall code rate control is more accurate.

Description

technical field [0001] The present application relates to the technical field of video encoding, in particular to a video encoding method, device, system and computer-readable storage medium. Background technique [0002] The video can be compressed by the video coding technology to reduce the data volume of the video, reduce the network bandwidth during the video transmission process, and reduce the storage space. Generally, video coding standards include processes such as intra-frame prediction, inter-frame prediction, transformation, quantization, loop filtering, and entropy coding to achieve data compression. [0003] In order to better control the size of the code stream during video transmission, different code rate control models are integrated in video coding standards. The code rate control generally controls the code rate from the Group of Picture (Group of Picture, GOP) level, frame level, coding unit level and other levels. Generally speaking, for areas with fl...

AI Technical Summary

Problems solved by technology

However, the existing technology simply uses the coding information of the largest coding unit (LCU) at the same position in the previous frame to determine whether to divide the current LCU. If the difference between the two frames before and after is large, the coding information of the previous frame cannot To characterize the division of LCU in the current frame well, other information is needed

At the same time, most of the existing technologies are improved based on a specific video coding standard, and the adaptability to other video coding standards is low

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