Ghost signal eliminating system

Details Ghost signal eliminating system Ghost signal eliminating system

1975-12-01

1977-10-11

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358905, 328165, 325476, H04N 521, H04B 112

Patent

active

040539326

ABSTRACT:
A ghost signal eliminating system which eliminates a ghost by delaying a video signal through a variable delay line by the delay time of the ghost from the true image and subtracting the delayed video signal from the original video signal. The variable delay line comprises a fine adjusting circuit for fine-adjusting the delay time and a coarse adjusting circuit for coarse-adjusting the delay time, the coarse adjusting circuit being controlled by a detection voltage for a control voltage level and the fine adjusting circuit being controlled by a voltage which is the difference between the control voltage and the detection voltage.

REFERENCES:
patent: 3238300 (1966-03-01), Bopp et al.
patent: 3482168 (1969-12-01), Sasao
patent: 3749823 (1973-07-01), Warner
patent: 3758710 (1973-09-01), Crosno
patent: 3763317 (1973-10-01), Coleman et al.
patent: 3935536 (1976-01-01), Kimura et al.
patent: 3956585 (1976-05-01), Butler et al.
patent: 4013834 (1977-05-01), Kind et al.
Coleman, "A New Technique for Time Base Stabilization of Video Recorders," IEEE Transactions on Broadcasting, vol. BC-17, No. 1 (Mar. 1971), pp. 29-36.

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