Signal measurement

Details Signal measurement Signal measurement

1987-07-13

1989-02-21

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358177, 455246, 455239, 340723, 330129, H04N 552

Patent

active

048070351

ABSTRACT:
Apparatus for measuring the noise present in a video signal is adapted to operate on a spare line of the video field. An AGC circuit is used in which a known amount of gain is applied to the input signal and compared with the reference signal. A feedback loop includes a PROM containing data indicative of the antilog of all possible difference signals and applies the antilog data as feedback data to the gain control.

REFERENCES:
patent: 3628362 (1986-12-01), Waehner
patent: 4016557 (1977-04-01), Zitelli et al.
patent: 4247789 (1981-01-01), Cate et al.
patent: 4263560 (1981-04-01), Ricker
patent: 4270142 (1981-05-01), Mackelburg et al.
patent: 4517526 (1985-05-01), Di Crico
patent: 4546326 (1985-10-01), Van Uffelen et al.
patent: 4630117 (1986-12-01), Parker
patent: 4682087 (1987-07-01), Kikuchi
patent: 4692912 (1987-09-01), Mueller et al.

Affiliated with

Also associated with

Rating

Signal measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal measurement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1526710