Television signal selection device

Details Television signal selection device Television signal selection device

1987-07-30

1989-04-04

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581951, 655182, 655192, H04N 550

Patent

active

048190691

ABSTRACT:
A television signal selection device comprising the fact that a band to-be-searched within a channel is checked successively from the upper side toward the lower side thereof with a video signal detection output and an AFT voltage output, by the use of a unit search frequency band which is prescribed by the characteristic of a lower-side adjacent voice trap on the lower frequency side and the PLL lock-in range of a video signal demodulator on the higher frequency side. In addition, the checked results are stored as the positions of the unit search frequency bands of the band to-be-searched.

REFERENCES:
patent: 4038689 (1977-07-01), Rzeszewski et al.
patent: 4249259 (1981-02-01), Oda et al.
patent: 4262364 (1981-04-01), Fujita
patent: 4302778 (1981-11-01), Tanaka
patent: 4429415 (1984-01-01), Chin et al.
patent: 4439787 (1984-03-01), Mogi et al.
patent: 4498191 (1985-02-01), Rogers
patent: 4594611 (1986-06-01), Sugibayashi et al.
patent: 4689685 (1987-08-01), Testin et al.

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