METHOD AND DEVICE FOR OBTAINING SPECTRAL COEFFICIENTS FOR REPLACEMENT AUDIO FRAME, AUDIO DECODER, AUDIO RECEIVER AND AUDIO SYSTEM FOR AUDIO TRANSMISSION Russian patent published in 2017 - IPC G10L19/05 

FIELD: physics.

SUBSTANCE: method for obtaining the spectral coefficients for the replacing audio frame is performed as follows: detecting the tonal components of the audio signal spectrum based on the peak that is present in the spectra of the frames preceding the replacing frame, the prediction of the spectral coefficients for the peak and its surroundings in the spectrum of the replacing frame is carried out for the tonal component of the spectrum and the non-predicted spectral coefficients for the replacing frame or of the corresponding spectral coefficient of the frame preceding the replacing frame is used for the non-tonal component of the spectrum. The spectral coefficients for the peak and its environment in the spectrum of the replacing frame are predicted based on the amplitude of the complex spectrum of the frame preceding the replacing frame and the predicted phase of the complex spectrum of the replacing frame, and the phase of the complex spectrum of the replacing frame is predicted based on the phase of the complex spectrum of the frame preceding the replacing frame, and the phase shift between the frames preceding the replacing frame.

EFFECT: improving the accuracy of decoding.

39 cl, 8 dwg