AUDIO ENCODER, AUDIO DECODER, AUDIO SIGNAL ENCODING METHOD AND METHOD OF DECODING ENCODED AUDIO SIGNAL Russian patent published in 2019 - IPC G10L19/02 

FIELD: physics.

SUBSTANCE: invention relates to audio encoding and decoding devices. Spectrum coefficients of the audio signal for the current frame and at least one previous frame are determined. Predictive coding is applied to a plurality of separate spectral coefficients or groups of spectral coefficients. Plurality of separate spectral coefficients or groups of spectral coefficients of the current frame are encoded with prediction by encoding prediction errors between a plurality of predicted separate spectral coefficients or groups of predicted spectral coefficients of current frame and multiple separate spectral coefficients or groups of spectral coefficients of current frame. Plurality of predicted separate spectral coefficients or groups of predicted spectral coefficients for the current frame is calculated using a corresponding plurality of separate spectral coefficients or corresponding groups of spectral coefficients of at least two previous frames.

EFFECT: technical result is to improve the efficiency of audio encoding.

66 cl, 6 dwg