Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-12-29
1980-02-19
Murray, Richard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358160, 358188, 325455, H04N 550
Patent
active
041897501
ABSTRACT:
There is disclosed a signal lever meter which provides accurate measurements of both sound and picture signal strengths despite the fact that the same detector and display are used for both. The conventional peak detector has a greater response for television sound signals than it does for television picture signals, and this necessarily leads to errors in the readings for at least one of the signals. In the meter of the invention, when a picture signal is being processed the D.C. bias of the detector is increased, thus increasing its response and allowing accurate measurements to be taken for both signals. In the preferred embodiment of the invention, the detector D.C. bias is automatically increased when a picture signal is being processed in response to the detection of picture signal sync pulses. Additional features of the meter include the provision of both analog and digital displays, and several lights for indicating such things as under-range and over-range conditions and the type of signal being processed.
REFERENCES:
patent: 2910530 (1959-10-01), Clark
LandOfFree
Method and apparatus for measuring television sound and picture 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 measuring television sound and picture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring television sound and picture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-655664