LEVEL ADJUSTMENT IN TIME DOMAIN FOR DECODING OR ENCODING AUDIO SIGNALS Russian patent published in 2017 - IPC G10L19/00 

FIELD: acoustics.

SUBSTANCE: invention relates to encoding, decoding and processing audio signals. Audio signal decoder for providing a decoded audio signal presentation based on an encoded audio signal presentation includes a cascade of preliminary processing of the decoder to obtain a plurality of frequency band signals from the encoded audio signal presentation, a clipping estimation module, a level shift module, a converter of the frequency domain into the time one and a level shift compensator. Clipping estimation module analyses the encoded audio signal representation and/or an additional information regarding amplification of frequency band signals to determine the current level shift coefficient. Level shift module shifts the frequency band signals levels in accordance with the level shift coefficient. Converter of the frequency domain into the time one converts the frequency band signals with shifted levels into the time domain presentation. Level shift compensator affects the time domain presentation for partial compensation of the corresponding level shift and for producing a significantly compensated presentation of the time domain.

EFFECT: technical result is the possibility of the signal level adjustment within the dynamic range without loss of the data accuracy.

16 cl, 17 dwg