Aperture correction circuit for television

Details Aperture correction circuit for television Aperture correction circuit for television

1974-09-27

1976-04-20

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

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178DIG25, H04N 914

Patent

active

039523276

ABSTRACT:
A vertical aperture correction circuit for television in which two cheap narrow-band delay circuits are used for giving a line period delay by means of signal modulation. High-frequency video information is applied through a highpass filter to an adder stage to which furthermore the low-frequency video information delayed over one line period and the aperture correction signal are applied. The highpass filter may be formed with a third narrow-band delay circuit as a bandpass filter.

REFERENCES:
patent: 3030440 (1962-04-01), Schade, Sr.
patent: 3732360 (1973-05-01), Breimer et al.
McMann, "Improved Signal Processing Techniques for Color Television Broadcasting," Journal of SMPTE, Vol. 77, Mar. 1968, pp. 221-228.
Gibson, "A Vertical Aperture Equalizer for Television," Journal of SMPTE, Vol. 69, June 1960, pp. 395-401.
Capers, "Camera Engineering - The Mark VIII Camera Channel Design of the Video Circuits," Sound & Vision Broadcast, (G.B.), Vol. 12, No. 1 (Spring 1971), pp. 24-30.

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