AUDIO OR VIDEO ENCODER, AUDIO OR VIDEO AND RELATED METHODS OF PROCESSING MULTI-CHANNEL AUDIO OR VIDEO SIGNALS USING VARIABLE PREDICTION DIRECTION Russian patent published in 2015 - IPC G10L19/08 G10L19/04 

FIELD: physics, video.

SUBSTANCE: invention relates to means of processing multi-channel audio or video signals using a variable prediction direction. Two audio or video channels are combined to obtain a first combination signal as a mid signal and a residual signal which can be obtained using a predicted side signal obtained from the mid signal. The first combination signal and the residual prediction signal are encoded and written into a data stream together with the prediction information obtained by an optimiser based on an optimisation target and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator and the prediction information to obtain a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal.

EFFECT: high audio or video quality.

19 cl, 31 dwg, 2 tbl