Lossless encoding/decoding in a transmission system

摘要

In a transmitter digital information signal is lossy encoded to form a lossy encoded signal. The lossy encoded signal is decoded to form a lossy replica signal. The lossy replica signal and the digital information signal are combined to form a first residue signal. The first residue signal is predicted, yielding a first predicted signal. The first predicted signal is losslessly entropy encoded (e.g. adaptive Huffman encoded) to provide a lossless residue signal. Both the lossy signal and the lossless residue signal are transmitted via the transmission medium. In a receiver, the lossy signal and lossless residue are separated. The lossy signal is decoded to form a lossy replica of the digital information signal. The lossless residue signal is entropy decoded (e.g. adaptive Huffman decoder) to form a second residue signal. The second residue signal is predicted, yielding a second predicted signal. The second predicted signal is combined with the lossy representation to reproduce the digital information signal.