Ratio configurable multiple description correlating transforms coding

摘要

Multiple description coding (MDC) is one of source coding techniques which generate several descriptions from a single data. A decoder of MDC reconstructs the data from these descriptions. Even if some descriptions are lost, the decoder can reconstruct a similar data from the other descriptions. Therefore, this coding technique is expected to apply applications which prefer accepting error of data to retransmitting the lost or erroneous data over multipath noisy network. Multiple description correlating transforms coding (MDCTC) is a method to realize MDC with a matrix. Based on this method, this paper proposes the method, ratio configurable multiple description correlating transforms coding (RMDCTC), which can adjust the data size ratio among descriptions to fit the ratio of channel bandwidths. The proposed method is suitable to apply error allowable communicating applications over asymmetric multipath noisy network. Mathematical analysis and experimental results verify the effectiveness of the proposed method.