Video stream decoding method and device

Abstract

The invention discloses a video stream decoding method and device. The video stream decoding method includes that detecting whether the buffer region of a digital signal processor DSP is located at an unsaturated state, wherein the DSP buffer region is used for caching video frame data; if so, inserting blank frames EOS in the DSP buffer region till the DSP buffer region arrives at a saturated state; decoding the frame data in the DSP buffer region. When the DSP buffer region is located at the unsaturated state and the residual video stream in the DSP buffer region cannot be decoded instantly, the video stream decoding method is capable of inserting blank frames which do not influence the video stream playing effect in the DSP buffer region to enable the DSP buffer region to quickly arrive at the saturated state so as to decode the frame data with the residual video stream; the video stream decoding method realizes to instantly decode the residual video stream data based on keeping the subsequent playing effect of the video stream.

Description

technical field [0001] The present invention relates to the technical field of streaming media, in particular to a video stream decoding method and device. Background technique [0002] In order to reduce the impact of unstable network environment on video stream decoding, before decoding video streams, electronic devices with video stream decoding functions usually pre-establish video stream buffers locally, such as figure 1 H.264 buffer in; In addition, in order to rationally allocate CPU (Central Processing Unit, central processing unit) resource, this electronic equipment usually adopts DSP (Digital Signal Processor, digital signal processor) to carry out hard solution to video flow, wherein, There is an input buffer within the DSP, which is referred to as a DSP buffer here for the convenience of description. [0003] In the prior art, the video decoding process is as follows figure 1 As shown, when the network video stream arrives at the electronic device, it is first...

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Problems solved by technology

[0004] However, since the video stream in the DSP buffer can only come from the H.246 buffer, when the video stream in the network is blocked, the network video stream cannot be buffered continuously in the H.246 buffer, and the H.264 The video stream in the buffer will be exhausted soon, and the DSP buffer may still not be full. At this time, the video stream remaining in the DSP buffer cannot be decoded immediately, only waiting for other data from the H.264 buffer When the video stream in the DSP buffer is filled, this part of the residual video stream can be decoded, which causes the residual video stream in the DSP buffer to be decoded with delay

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