A robust error resilient video compression algorithm

Compressed video data comes with a problem of sensitivity to channel errors. As a result, error resilience capability is very important for video expanders. We describe a variety of error concealment techniques which give a video compression algorithm the robustness it needs while operating in noisy channels. For the sake of simplicity, the principles of the video compression algorithm which we use are based on the MPEG algorithm. The major error concealment techniques discussed are correlation sequences to avoid error propagation, error correcting codes to protect very sensitive data, replacement of damaged data by other kind of data, when this is possible and using error detection codes to detect errors on sensitive data. In addition to that, sensitive data interleaving is used for the data protected by error correcting codes (ECC), to make the ECC decoding much more efficient. We also show a generic relation between the optimum channel bit rate and the given channel BER.<
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