SPEECH AUDIO ENCODING DEVICE, SPEECH AUDIO DECODING DEVICE, SPEECH AUDIO ENCODING METHOD AND SPEECH AUDIO DECODING METHOD Russian patent published in 2019 - IPC G10L19/32 

FIELD: coding.

SUBSTANCE: invention relates to audio encoding and decoding devices. Receiver receives encoded data, including a band limited mode flag. Information on the position of the frequency of the spectrum with the maximum amplitude of the previous frame in the strip obtained by dividing is stored in the memory. Identify with the processor whether the decoding band is encoded using the limited band mode based on the decoded limited band mode flag. When a decoding band is identified as a band encoded using the limited band mode, processor decodes the spectrum in a limited band within each of the obtained by dividing the bands in the current frame, using the stored information about the position of the frequency of the spectrum with the maximum amplitude of the previous frame.

EFFECT: technical result is reducing the number of bits necessary to encode the spectrum, while maintaining sound quality.

8 cl, 24 dwg