DEVICE FOR SPEECH SIGNAL PROCESSING Russian patent published in 2019 - IPC G10L15/02 G10L15/28 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in automated communication systems. Device for processing a speech signal consists of an analogue-to-digital unit for processing a speech signal, which is made of an envelope detector which is in parallel connected to a fundamental tone detector and a level normalizer, which in its turn is connected to a spectral-band analyzer, and an actuating unit. Outputs of the envelope detector, the fundamental tone detector and the spectral-band analyzer are connected to the analogue-to-digital converter. Actuating unit consists of the first digital oscillating filter, delay line, device of variable coefficients and the second digital oscillating filter. In the first digital oscillating filter, the number of filter coefficients ranges from 10 to 12. Outputs of elements determining values of coefficients are connected to ten inputs of second digital oscillating filter, with delay line. First tone of the first digital oscillating filter is transmitted to the main tone of the speech signal and random noise.

EFFECT: high reliability of the device under high noise conditions.

1 cl, 1 dwg