Apparatus for determining recording mode of frequency-modulated

Details Apparatus for determining recording mode of frequency-modulated Apparatus for determining recording mode of frequency-modulated

1989-09-14

1992-05-12

Envall, Jr., Roy N.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358335, 358310, 360 331, H04N 578

Patent

active

051132656

ABSTRACT:
An apparatus determines a recording mode of a frequency-modulated video signal read out from a recording medium. The apparatus extracts, from demodulated video signals, pulse signals related to vertical and horizontal synchronization signals. With consideration of a period defined by these pulse signals, the apparatus sets a predetermined period, in which, a signal containing a sync tip frequency component of the frequency-modulated signal is counted to determine the recording mode depending on a resultant count.

REFERENCES:
patent: 4642704 (1987-02-01), Douotsubo
patent: 4686585 (1987-08-01), Sato
patent: 4772950 (1988-09-01), Furuhata et al.
patent: 4949195 (1990-08-01), Fujiwara

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