Process and circuit for decoding the output signal of a camera t

Details Process and circuit for decoding the output signal of a camera t Process and circuit for decoding the output signal of a camera t

1976-04-13

1977-12-20

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 37, 358 47, 358166, 358 31, H04N 907, H04N 514

Patent

active

040645312

ABSTRACT:
A circuit and process for decoding the output signal of a single-tube color television camera which is characterized in that the output signal of the camera tube is connected to a high-pass filter and a low-pass filter each of which are followed by two series-connected delay lines exhibiting a delay in each case of one line length, that the series connection of the delay lines are each connected to two summing elements each with three inputs for the undelayed signal, the singly delayed signal and the doubly delayed signal, where a further summing element for the undelayed and the doubly delayed high frequency signal is connected to the high-pass filter and the following delay lines, that the outputs of the first two summing elements which are connected to the high-pass filter each lead through a band-pass filter and a demodulator to an input of a matrix. A third and fourth summing element are connected to the doubly delayed, the singly delayed and the undelayed lines from the low-pass filter. A fifth summing element is connected to the doubly delayed line and to the undelayed line from the high-pass filter, a transit time element connected to the fifth summing element which serves to match the transit time of the low-pass filter and the outputs of the two summing elements connected to the low-pass filter, to the inputs of an adder element, where the output of the adder element carries the clearly defined luminance signal and two outputs from the matrix which carry two color difference signals.

REFERENCES:
patent: 3444318 (1969-05-01), Monteath
patent: 3588827 (1971-06-01), Van Roessel et al.
patent: 3729580 (1973-04-01), Schneider
patent: 3780212 (1973-12-01), Glenn, Jr.
patent: 3952327 (1976-04-01), Hofman et al.

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