Video data decoding method, encoding method and related devices

Abstract

The embodiment of the invention discloses a video data decoding method, encoding method and related devices. The method comprises the following steps: determining a starting playing frame in video encoding data, searching a data frame closest to the starting playing frame and with a random access node type from the starting playing frame along a direction opposite to a decoding sequence of the video encoding data, and determining the searched data frame as a target random access node; when the random access node type of the target random access node is a preset first random access node type based on an inter-frame encoding frame, decoding the target random access node according to an intra-frame random access point referred by the target random access node; and decoding the data frames starting from the decoded target random access node along the direction the same as the decoding sequence one by one until the starting playing frame is decoded. By adoption of the video data decoding method disclosed by the invention, the access efficiency of the random access is improved while the video encoding efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a video data decoding method, an encoding method and related equipment. Background technique [0002] In some surveillance videos, there are usually a large number of static or small motion areas. For the current video images in these areas, it is easy to find matching reference images in frames that have been processed before or even a long time ago. Therefore, when the encoder encodes these surveillance videos, it should use as many inter-frame coded frames as possible to reduce the use of intra-frame coded frames, so that the bit rate can be greatly reduced to improve video coding efficiency. Wherein, the interframe coded frames encoded by the encoder may include P frames and B frames, that is, both P frames and B frames are generated based on an interframe compression algorithm, P frames are specifically forward predictive coded frames, and B frame...

AI Technical Summary

Problems solved by technology

It can be seen that if the number of I frames in the video code stream is relatively small, there may be more interframe coded frames between the nearest random access point and the target frame, that is, the decoder needs to spend more time to decode Out of the target frame, thus reducing the access efficiency of random access

[0004] The prior art provides a method for improving the access efficiency of random access, by increasing the number of I frames in the video code stream to improve the access efficiency of random access, but due to the large number of I frames, the video frequency will be reduced at this time. coding efficiency

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