关键词: 地面数字多媒体广播, 里德-索罗门码, 卷积交织, 填充字节, 错误位置预测, 纠错

Abstract: Through analyzing the outer coding frame in Terrestrial-Digital Multimedia Broadcasting (T-DMB) mobile TV system and making use of the fact that the value of stuffing bytes in TS packets is set, an algorithm was proposed to detect the stuffing bytes section and correct the errors contained in this section before the Reed-Solomon (RS) decoding process. Then the locational relationship between the codewords before and after the deinterleaving process was analyzed. Based on that relationship, for the packets that could not be decoded by the normal error-correcting RS decoder, the proposed algorithm can predict error locations to perform both error and erasure correction, which results in the enhancement of error-correcting capability for T-DMB system and the improvement of the video and audio quality.

Key words: Terrestrial-Digital Multimedia Broadcasting (T-DMB), Reed-Solomon code, convolutional interleave, stuffing bytes, error-location prediction, error correction