TRANSITION FROM TRANSFORM CODING/DECODING TO PREDICATIVE CODING/DECODING Russian patent published in 2018 - IPC G10L19/20 H03M7/30 

FIELD: data processing.

SUBSTANCE: invention relates to the encoding and decoding of a digital audio signal. Said decoding method comprises the steps of decoding according to an inverse transform decoding of a previous frame of samples of the digital signal, wherein the frame is received and coded according to a transform coding, decoding according to a predictive decoding of a current frame of samples of the digital signal, wherein the frame is received and coded according to a predictive coding. Further, the predictive decoding of the current frame is a transition predictive decoding which does not use any adaptive dictionary arising from the previous frame, and the method furthermore comprises a step of reinitialization of at least one state of the predictive decoding to a predetermined default value, an add-overlap step which combines a signal segment synthesized by predictive decoding of the current frame, and a signal segment synthesized by inverse transform decoding, corresponding to a stored segment of the decoding of the previous frame.

EFFECT: providing an efficient transition from encoding or decoding with conversion to predictive coding or decoding.

17 cl, 10 dwg