APPARATUS AND METHOD FOR IMPROVED SIGNAL FADE OUT FOR SWITCHED AUDIO CODING SYSTEMS DURING ERROR CONCEALMENT Russian patent published in 2018 - IPC G10L19/05 G10L19/09 G10L25/90 

FIELD: physics.

SUBSTANCE: invention relates to decoding an audio signal. Apparatus comprises a receiving interface that is configured to receive a first frame comprising a first portion of the audio signal and which is configured to receive a second frame comprising a second portion of the audio signal. Apparatus comprises a noise level monitoring unit, which is configured to determine the noise level information in dependence of at least one of the first part of the audio signal and the second part of the audio signal, and noise level information is provided in the tracking area. Apparatus comprises a first recovery unit for restoring, in the first recovery region of the third portion of the audio signal, depending on noise level information, if a third frame of a plurality of frames is not received using the reception interface or if the specified third frame is received using the receive interface, but it is corrupted, the first recovery area is different or equal to the tracking area.

EFFECT: technical result is the provision of improved concepts for sound encoding systems.

22 cl, 17 dwg, 2 tbl