LOW BIT RATE AUDIO ENCODING/DECODING SCHEME WITH COMMON PREPROCESSING Russian patent published in 2013 - IPC G10L19/20 

FIELD: information technology.

SUBSTANCE: audio encoder having a common preprocessing stage (100), an information receiver based encoding branch (400) which is a spectral domain encoding branch, a information source based encoding branch (500) which is an LPC-domain encoding branch and a switch (200) for switching between these branches or outputs of these branches controlled by a decision stage (300). The audio decoder has a spectral domain decoding branch, an LPC-domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal to obtain a post-processed audio signal.

EFFECT: high quality of encoding an audio signal at low bit rates.

26 cl