KEYWORDS: Video, Video coding, Video compression, Computer programming, Error analysis, Forward error correction, Video processing, Video surveillance, Image quality, Semantic video
In this paper a novel robust video transmission scheme is proposed that can not only decode the compressed video stream in two directions but also correct channel errors with limit burst length. Standard video coders usually utilize variable length coding (VLC) to obtain high compression ratio, which makes the compressed bit stream very vulnerable to channel errors. Even one bit error may lead to loss of synchronization with the following bits undecodable and result in error propagation. In order to limit error propagation due to VLC we put forward a new video coding scheme named as two-way decodable variable length data blocks (TDVLDB), which makes the compressed bit stream bi-directionally decodable through reversal and XOR operations. Great subjective and object quality improvements have been found in our simulation results compared with other resilient schemes, such as the reversible variable length codes (RVLC) scheme, the partial backward decodable bit stream (PBDBS) scheme and the early resynchronization (ER) scheme.
This paper presents an error correction method applied in H.263 video coding, which is H.263 video decode based error detection and concealment algorithm. This algorithm can be applied in video communication of Public Switched Telephone Network (PSTN), Internet or mobile channel. It has been found that this error correction method can greatly improve the quality of images transmitted on channel with noise interference and will not decrease compression ratio.
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