| 摘要 |
<p>A new coding of stereophonic audio signals ( x R ( k ), x L ( k )) based on inter-channel linear prediction is presented. In contrast to other recent contributions on joint-stereo coding where left-to-right- and/or right-to-left-channel linear prediction is used, in the invention each of the two channels is predicted by filtering the center stereo image ( x M ( k )) of both channels. The technique for calculating optimal filter coefficients ( a R ( i ), a L ( i )) for both channels is a generalization of Mid/Side and Left/Right joint-stereo coding. Since the invention is based on a time domain representation of the signals, it is especially well suited for stereo coding with low algorithmic delay. Due to its modularity, it is also suitable to extend any existing monaural speech or audio codec towards stereo functionality.</p> |
