Radio receiver with masking of switchover noise

Details Radio receiver with masking of switchover noise Radio receiver with masking of switchover noise

1992-01-22

1994-09-20

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4552001, 455303, 381 81, H04B 116

Patent

active

053496990

ABSTRACT:
The Radio Data System (RDS) protocol promulgated by the European Broadcasting Union provides for alternate frequencies (AF) for the same broadcast. Receivers periodically switch over to such an alternate frequency, leading to momentary crackling noises. In a radio receiver having a device for temporary switchover from a received frequency to some other frequency, substitute signals are inserted into the audio signals that are interrupted during the temporary switchover. The substitute signals are formed from the audio signals before and optionally also after the temporary switchover.

REFERENCES:
patent: 4914715 (1990-04-01), Miyata
patent: 4933954 (1990-06-01), Petry
Texas Instruments, Dallas, Tex., TMS 320 Family Development Support Reference Guide, cop. 1986, pp. 9-5, 9-6, 9-7, A-5, BQ.
Motorola, Inc., Austin, Tex., Microprocessor, Microcontroller and Peripheral Data, vol. 2, pp. 3-1563 through 3-1565 and 3-1605 (Pinout of MC 68 HC 11 E9); Third Printing, 1988.
Patent Abstracts of Japan, vol. 6, No. 182 (E-131), 18 Sep. 1982 abstracting Fujii/Fujitsu publication 57-095 746 of 14 Jun. 1982.
Patent Abstracts of Japan, vol. 13, No. 198 (E-756), 11 May 1989 abstracting Kato/N.E.C. publication 1-019 of 23 Jan. 1989.

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