Multiple-error signal coding device and method

The invention provides a multiple DPCM signal coding device and a method thereof. The device comprises a primary DPCM signal coder and a multiple DPCM signal coder array, wherein the primary DPCM signal coder simultaneously receives P channel data streams for performing primary DPCM signal coding processing so as to generate a primary DPCM signal coding data stream; and the multiple DPCM signal coder array comprises Q series-connected multiple DPCM signal coders and is used for performing Q times of parallel subtraction coding processing on the primary DPCM signal coding data stream so as to generate (R-1) channel multiple DPCM signal coding data streams. By using the characteristic that bit width of hardware limits overflow, and a mechanism which is shared by symbols of software, the number of the symbols which is subjected to the DPCM signal coding is the same as that of the original input data, so that the symbol length and the average coding length which are generated by backward stage Huffman coding can