REDIGITISATION OF AUDIO CODEC OUTPUT SIGNALS WITH HELP OF QUADRATURE MIRROR FILTERS (QMF) Russian patent published in 2015 - IPC G10L21/00 G10L19/16 

FIELD: physics, acoustics.

SUBSTANCE: invention relates to means of redigitisation of output signals of audio codecs on the basis of quadrature mirror filters. This device comprises configurable first processor of audio signal for audio signal processing in compliance with different parameters of configuration to get processed audio signal. Note here that this device is configured to make the configuration different parameters bring about different signals of digitisation of processed audio signal. Additionally, this device comprises the set of n filters of analysis that include the first number of analysis filter set channels and the set of synthesis filters. It includes also the second number of channels of the synthesis filter set. Second audio processor adapted for audio signal reception and processing, audio signal having preset digitisation frequency. Controller is used to adjust the first number of analysis filter set channels or their second number in compliance with configuration parameters.

EFFECT: enhanced performances for redigitisation of audio signal.

14 cl, 22 dwg