Circuit for detecting vertical mis-registration in a flying spot

Details Circuit for detecting vertical mis-registration in a flying spot Circuit for detecting vertical mis-registration in a flying spot

1975-07-30

1976-08-24

Britton, Howard W.

Telegraphy

Systems

Simplex-reversing periodic

178DIG28, 178DIG29, H04N 336

Patent

active

039768325

ABSTRACT:
This invention concerns a circuit for detecting vertical mis-registration in a flying spot scanner of the kind in which each film frame is scanned by at least two interlaced fields.
For proper vertical registration each line of each field should fall midway between two adjacent lines of the other field. This means that, on average, the mean video signal value of each line of one field should equal the mean video signal value of the two adjacent lines of the other field.
Our invention detects whether this is so by forming the difference between the means video signal values of each line of one field with that of the two adjacent lines of the other field, and summing over a number of lines.

REFERENCES:
patent: 3767852 (1973-10-01), Horowitz
patent: 3778545 (1973-12-01), Metzger
patent: 3806645 (1974-04-01), Faureau

Affiliated with

Also associated with

Rating

Circuit for detecting vertical mis-registration in a flying spot does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for detecting vertical mis-registration in a flying spot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for detecting vertical mis-registration in a flying spot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-779905