FIELD: data processing.
SUBSTANCE: this invention relates to complex prediction-based MDCT stereo coding. An output stereophonic signal is obtained from an input stereophonic signal encoded by stereophonic coding with complex prediction and including first representations of two input channels in the frequency domain. Encoding includes the following stages of upmixing: (i) calculating second representation of first input channel in frequency domain and (ii) calculating output channel based on first and second representations of first input channel in frequency domain, the first representation of the second input channel in the frequency domain and the complex prediction coefficient. Upmixing can be stopped in response to control data.
EFFECT: technical result consists in increasing the efficiency of stereo coding when transmitting data with a high bit rate.
13 cl, 19 dwg
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