Mdct-based complex prediction stereo coding

Abstract

The invention provides methods and devices for stereo encoding  and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channels; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representations of the second input channel and a complex prediction coefficient. The upmixing can be suspended responsive to control data