Patent ID: 8326618

Claim:
Method for lossless encoding of a source signal, using a lossy encoded data stream and a lossless extension data stream which together form a lossless encoded data stream for said source signal, said method comprising the steps: lossy encoding said source signal, wherein said lossy encoding provides said lossy encoded data stream, comprising: lossy decoding said lossy encoded data, thereby reconstructing a decoded signal and providing side information for controlling a time domain prediction filter; forming a difference signal between a correspondingly delayed version of said source signal and said decoded signal, prediction filtering said difference signal using filter coefficients that are derived from said side information so as to de-correlate in the time domain the consecutive values of said difference signal; lossless encoding said de-correlated difference signal to provide said lossless extension data stream; combining said lossless extension data stream with said lossy encoded data stream to form said lossless encoded data stream.