AUDIO ENCODER, AUDIO DECODER, METHOD OF PROVIDING CODED AUDIO INFORMATION, METHOD OF PROVIDING DECODED AUDIO INFORMATION, COMPUTER PROGRAM AND CODED PRESENTATION USING SIGNAL-ADAPTIVE BANDWIDTH EXTENSION Russian patent published in 2018 - IPC G10L19/22 

FIELD: physics.

SUBSTANCE: audio encoder comprises a low-frequency encoder for obtaining an encoded representation of the low-frequency portion and a unit for providing bandwidth extension information based on the input audio information. The audio encoder is also configured to selectively include the bandwidth extension information in the encoded audio information. The audio decoder comprises a low-frequency decoder to obtain a decoded representation of the low-frequency portion and an extension of the bandwidth to obtain a blind-bandwidth expansion signal for portions of audio content, for which the bandwidth expansion parameters are not included in the coded audio information and to obtain a bandwidth extension signal for portions of audio content, for which the parameters of the bandwidth extension are included in the coded audio information.

EFFECT: providing bandwidth expansion to improve the tradeoff between the bit rate and the sound quality.

38 cl, 8 dwg