A hierarchical synchronization technique based on the EREC for robust transmission of H.263 bit stream

In this letter, we propose an error-resilient transmission-technique for th e H.263 compatible video data stream, based on the data-partitioning techni que. The proposed algorithm employs the bit rearrangement technique of the error-resilience entropy coding in each layer, providing unequal error prot ection against the channel errors, without requiring additional side inform ation. In addition, we propose the recovery algorithm for the lost or erron eous motion vectors. The proposed algorithm is implemented, based on the H. 263 standard, and evaluated through intensive computer simulation. The expe rimental results demonstrate that the proposed algorithm provides acceptabl e performance both subjectively and objectively at various bit error rates and burst lengths.