Fault-tolerant method for AVS2 decoder reference image management

Abstract

The invention discloses a fault-tolerant method for AVS2 decoder reference image management. Reference configuration information corresponding to an image is transmitted in each image header, and thespecific operation method comprises the following steps of: (1) for the situation that a certain image frame is lost, which causes that an image referring to the image frame later cannot be decoded, carrying out processing by adopting a method of randomly selecting an idle image frame from a decoded image buffer area as the lost image frame; and (2) aiming at the problem that the image frame whichis specified in the reference configuration information and should be removed from the decoded image buffer area cannot be removed in time due to the loss of a certain image frame, processing the image frame by combining two methods of increasing the size of the decoded image buffer area and removing the image frame which is not referenced any more and has the minimum decoding sequence value in the decoded image buffer area. The method has the beneficial effects that even if a code stream has errors and certain frames are lost, the AVS2 decoder can still continue to work, and the influence onthe output of the decoder is reduced as much as possible, so that the AVS2 decoder can still stably operate for a long time.

Description

technical field [0001] The invention relates to the related technical field of digital video decoding, in particular to an error-tolerant method for AVS2 decoder reference image management. Background technique [0002] The AVS2 reference decoder can decode correctly when the input stream is normal. But when there is an error in the received code stream, such as when the network loses packets, the reference decoder will stop working due to the error. AVS2 uses the reference configuration set technology RCS (Reference Configuration Set) to realize reference image management. The configuration information corresponding to the image is transmitted in each image header to indicate which images are referenced by the current image and which images in the decoded image buffer need to be moved out of the buffer. When the AVS2 stream is transmitted on the actual network, there will be occasional network packet loss, which will lead to the loss of some image frames. Not only the mi...

AI Technical Summary

Problems solved by technology

When the AVS2 code stream is in the actual network transmission process, occasionally there will be network packet loss, which will lead to the loss of some image frames

Not only the missing image frame cannot be decoded, but also all image frames that refer to the missing frame cannot be decoded

Another more serious problem is that the reference configuration information in the image header will indicate which images need to be moved out of the decoding image buffer, then the loss of a certain frame will cause some image frames to not be removed from the decoding image buffer in time, and the decoding The size of the image buffer is fixed, which will inevitably cause the new image frame to be unresponsive because the available image resources cannot be obtained

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