OPTIMIZED LOW-THROUGHPUT PARAMETRIC CODING/DECODING

摘要

The present invention pertains to a method of parametric coding of a multichannel digital audio signal comprising a step of coding a signal arising from a channel reduction matrixing of the multichannel signal. The method of coding furthermore comprises the following steps: obtaining, per frame of predetermined length, spatial information parameters for the multichannel signal; dividing the spatial information parameters into a plurality of blocks of parameters; selecting a block of parameters as a function of the index of the current frame; coding the block of parameters selected for the current frame. The invention pertains also to a method of decoding the multichannel signal by decoding the blocks of parameters received per frame. It pertains to a coder and decoder implementing the respective methods of coding and decoding.