Patent ID: 6498811
Filing Date: 2002-12-24
Classification: G10L

Abstract:
A transmitter for transmitting a digital information signal via a transmission medium, said transmitter comprising:lossy encoder means for compressing a digital information signal to form a lossy encoded signal; lossy decoder means for expanding the lossy encoded signal to form a lossy replica of the digital information signal; a first signal combination unit for combining the digital information signal and the lossy replica to form a first residue signal; lossless encoder means for compressing the first residue signal to form a lossless encoded residue signal; a second signal combination unit for combining the lossy encoded signal and a lossless encoded residue signal to form a transmission signal; and means for transmitting the transmission signal via a transmission medium, wherein the lossless encoder means comprises:prediction filter means for deriving a prediction signal; a third signal combination unit for combining the prediction signal and the first residue signal to form a second residue signal; and entropy encoder means for encoding the second residue signal to form the lossless encoded residue signal.