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 channel; 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 representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing. Figure 4

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