DETECTION OF HIGH QUALITY IN FREQUENCY MODULATED STEREO RADIO SIGNALS Russian patent published in 2016 - IPC G10L25/69 

FIELD: communication.

SUBSTANCE: invention relates to communication, particularly to processing audio signals. Described is device (20) configured to assess quality of a received multi-channel FM radio signal. Received FM multichannel signal may be represented as a mid signal and side signal and side signal is indicative of difference between left signal and right signal. Device (20) comprises a power determination unit configured to determine (101) power of mid signal, referred to as mid power, and power of side signal, referred to as side power; a ratio determination unit configured to determine (102) a ratio of mid power and side power, thereby yielding a mid-to-side ratio; and a quality determination unit configured to determine (105) a quality indicator of received FM radio signal based at least on mid-to-side ratio.

EFFECT: higher quality of received FM stereophonic audio signal and selection of respective processing on basis of detected quality.

33 cl, 14 dwg