Video decoding method and related equipment

Abstract

The invention provides a video decoding method which comprises the following steps: receiving a video stream which carries a video level, a video resolution and a reference frame number actually used by video coding; obtaining the video level, the video resolution and the reference frame number actually used by video coding from the video stream; calculating an optimal image cache size according to the video resolution and a reference frame number actually used by video coding; obtaining an optimal video level corresponding to the optimal image cache size according to a corresponding relationship between the maximum decoded image cache size and the video level; if the video level in the video stream is greater than the optimal video level, modifying the video level in the video stream into the optimal video level; and inputting the video stream with the modified video level into a video decoder for decoding. The invention further provides a computer readable storage medium, electronic equipment and a chip system. According to the invention, the delay of video decoding can be reduced.

Description

technical field [0001] The present application relates to the technical field of video coding and decoding, and in particular to a video decoding method and related equipment. Background technique [0002] Existing video coding often refers to the previous several image frames for coding. Correspondingly, when decoding a video, it is necessary to refer to several previous image frames (ie forward reference frames), so a certain video buffer area needs to be set up to buffer the decoded image frames. For current video decoding, such as H.264-based video decoding, the protocol only specifies how to calculate the maximum number of cached frames. In order to ensure compatibility, many video decoders cache according to the calculated maximum number of cached frames, and the video buffer area The image frames in will not be output in advance, but the first stored frame will be output only after the video buffer is full. [0003] In the current video decoding method, the calculat...

AI Technical Summary

Problems solved by technology

[0003] The current video decoding method has a large maximum number of cached frames calculated, but a video stream with a small number of reference frames actually used in video encoding will have excessive buffering, resulting in increased video delay during decoding.

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