Method and apparatus for recording and replaying field-length-mo

Details Method and apparatus for recording and replaying field-length-mo Method and apparatus for recording and replaying field-length-mo

1990-06-06

1993-11-16

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358148, 380 3, H04N 716

Patent

active

052628744

ABSTRACT:
Copy protected video signals employing field-length-modulation (FLM) are effectively recorded by a VCR by stripping the rate-varying vertical sync pulses from the FLM video and reinserting constant rate vertical sync pulses having a rate equal to the mean frequency or half the mean frequency of the FLM sync pulses. Display of the recorded video on a conventional television monitor or set is achieved by removing the constant rate vertical sync pulses and reinstating the rate-varying FLM sync pulses. Timing marks placed at locations of stripped FLM sync pulses are used to position reinserted FLM sync pulses during playback of recorded video. Video gaps created by removed constant rate sync pulses are filled either with video information from a contiguous scan line or a filler signal to improve the appearance of the picture.

REFERENCES:
patent: 2547598 (1951-04-01), Roschke
patent: 2857455 (1958-10-01), Jollife
patent: 2972008 (1961-02-01), Ridenour
patent: 3005869 (1961-10-01), Dolby
patent: 4070693 (1978-01-01), Shutterly
patent: 4216500 (1980-08-01), St. Louis
patent: 4283740 (1981-08-01), Okada
patent: 4353088 (1982-10-01), den Toonder et al.
patent: 4378570 (1983-03-01), Broki
patent: 4390898 (1983-06-01), Bond et al.
patent: 4403252 (1983-09-01), Ragan et al.
patent: 4405942 (1983-09-01), Block et al.
patent: 4533949 (1985-08-01), Fujimura et al.
patent: 4547802 (1985-10-01), Fogarty et al.
patent: 4563702 (1986-01-01), Heller et al.
patent: 4568974 (1986-02-01), den Toonder et al.
patent: 4575754 (1986-03-01), Bar-Zohar
patent: 4598312 (1986-07-01), Geissler et al.
patent: 4600942 (1986-07-01), Field et al.
patent: 4604650 (1986-08-01), DelCoco et al.
patent: 4605961 (1986-08-01), Fredericksen
patent: 4803552 (1989-02-01), Marin
patent: 4951315 (1990-08-01), Switsen
patent: 5089900 (1992-02-01), Yokogawa

Affiliated with

Also associated with

Rating

Method and apparatus for recording and replaying field-length-mo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for recording and replaying field-length-mo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for recording and replaying field-length-mo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-25593