AUDIO SIGNAL PROCESSING METHOD AND DEVICE Russian patent published in 2012 - IPC G10L19/00 H03M7/00 

FIELD: information technology.

SUBSTANCE: in the audio signal processing method, it is identified whether the audio signal coding type is a music signal coding type used first type information. If not, it is identified whether the audio signal coding type is a speech signal coding type or a composite signal coding type using second type information. If the coding type of the audio signal is the coding type of a composite signal, then spectral data and a linear prediction coefficient are extracted from the audio signal, a residual signal is generated for linear prediction by performing inverse frequency-domain conversion of said spectral data, and the audio signal is reconstructed by performing linear predictive coding based on the linear prediction coefficient and said residual signal. If the coding type of the audio signal is the coding type of a music signal, then only first type information is used and if the coding type of the audio signal is the coding type of a speech signal or coding type of a composite signal, then both first type and second type information is used.

EFFECT: high efficiency of encoding and decoding audio signals of different types.

15 cl, 14 dwg