ADVANCED STEREO CODING BASED ON COMBINATION OF ADAPTIVELY SELECTABLE LEFT/RIGHT OR MID/SIDE STEREO CODING AND PARAMETRIC STEREO CODING Russian patent published in 2014 - IPC G10L19/08 H04S1/00 

FIELD: physics, acoustics.

SUBSTANCE: invention relates to means of encoding and decoding audio signals. A downmix signal and a residual signal are generated based on a stereo signal. The difference in intensity between channels and cross-correlation between channels are determined. Preferably, parametric stereo coding parameters are time- and frequency-dependent. A transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding can be selected. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-dependent.

EFFECT: high quality of signal encoding.

66 cl, 26 dwg