Video signal analyzer

Details Video signal analyzer Video signal analyzer

H - Electricity

04

N

350/1

H04N 17/00 (2006.01) H04N 5/21 (2006.01)

Patent

CA 1191592

-20- ABSTRACT OF THE DISCLOSURE Apparatus is provided which is responsive to a video signal for producing a position-modulated pulse train which is representative of the occurrence of transitions of the video signal. A transversal filter is responsive to the video signal and produces a differentiated replica of the video signal over a given band of frequencies. The output of the transversal filter contains transitional information of the video signal occupying a range of frequencies which is to be analyzed. Information representing transitions of positive, negative, or both polarities is then compared to a given threshold value. Signal transitions exceeding the threshold are converted to pulses, thereby producing a train of pulses representing significant transitions of a desired polarity or polarities. The times of occurrence of the pulses are then analyzed to generate a control signal for controlling a given characteristic of the video signal during processing.

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