TH24959B - Comb filter circuit followed by a lock-burn clock circuit. - Google Patents

Abstract

This invention defined the video signal processing system. that includes a lockburst clock generator It will have a response to the split chrominance signal. which is provided by a comb filter circuit. The comb filter includes a burst gate feedback device for combing through unfiltered video signals throughout the burst phase. In that way it increases the response time of the clock generator.

Claims (4)

1.Video signal processing equipment for processing mixed video signals Including burst components The device includes a comb filter (11,12,14-18) section that responds to a mixed video signal for supplying a normally comb-filtered chrominance signal to the signal processor. Chrominance (23) Clock generator (21) that is connected to the output of the chrominance processor for producing clock signals that are locked to the phase. Such burst components Have specific characteristics that are defined by The comb filter circuit. It is a properly modified comb-filter circuit that includes a segment for the proportionally (14-17) aggregation of the video signal from the first and third planes to the video signal from the signal. The second plane and the section (SW1, BG, 18) that act together with the comb filter part, while a burst element is formed for supplying the non-comb secondary burn component. Which represents the chromi signal The comb-filtered Nance is given to the said chrominan signal processor. 2. The device, as described in claim 1, also has the characteristics defined by sections that act in conjunction with the aforementioned comb filter circuits, including sections (13, SW1) for proportional inhibition of aggregation while there is Burst components occur So that a properly adapted comb filter circuit will determine the video signal from only the line segment along the second plane. As such, while there is such a burst of components. 3. The equipment referred to in claim 1 in the section of the comb filter circuit section includes a section for the inclusion of video signals from at least two horizontal lines. To provide an integrated signal with additional defined characteristics in respect of that section. It acts in conjunction with the comb-filter circuit, including the switch (SW1), for connecting the video signal from only one or more of the two or more horizontal lines. While there is a burst of components And, in other cases, for the such combined signal connection to the said chrominant processor. 4. The equipment referred to in claim 3 also has an additional set of characteristics, section (13) that responds to such compound video signals. In order for the production of passages to occur during the presence of such burs components. And in the part of the switch (SW1) will affect the pulses.