Improved Algorithm of Error-Resilient Entropy Coding Using State Information

This paper proposes an improved algorithm of the error-resilient entropy coding (EREC) to limit error propagation (EP) in variable-length-coding (VLC) bit stream. The main novelties include two folds. First, after each stage of EREC encoding process, the resulting states of all slots and blocks are conveyed as side information and used at decoders to remove the EP caused by those erroneous blocks/slots that have been placed-up/filled-up. Second, the alternate placement (AP) technique is proposed to alleviate the EP caused by those erroneous blocks/slots that are still partially-placed/partially-filled. An in-depth analysis shows that less than three bits per block are required for conveying state information. Experiments are conducted and the results show that our proposed method improves recovery quality significantly.