Circuit for suppression of short-lived noise-phenomena in a digi

Details Circuit for suppression of short-lived noise-phenomena in a digi Circuit for suppression of short-lived noise-phenomena in a digi

1994-03-28

1997-01-14

Kuntz, Curtis

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

455222, 455223, 455296, H04H 500, H04B 110

Patent

active

055947999

ABSTRACT:
In a circuit for suppressing short-lived noise phenomena in a digital audio signal, in particular during a temporary test reception of another transmitter, the audio signal is multiplied by a factor which, prior to the appearance of the noise phenomenon, is brought from a maximum value to a minimum value in accordance with a predetermined time function, and at the end of the noise phenomenon, is returned to a maximum value. The invention has special application to the Radio Data System defined by the European Broadcasting Union, and the testing of "Alternative Frequencies" in that system.

REFERENCES:
patent: 4434325 (1984-02-01), Kobayashi
patent: 4554668 (1985-11-01), Deman et al.
patent: 4593392 (1986-06-01), Kouyama
patent: 4947440 (1990-08-01), Bateman et al.
patent: 5091943 (1992-02-01), Sakata
patent: 5204973 (1993-04-01), Sugayama
patent: 5349699 (1994-09-01), Erben et al.

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