Progressive scan television receiver for non-standard signals

Details Progressive scan television receiver for non-standard signals Progressive scan television receiver for non-standard signals

1984-05-29

1986-06-03

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, H04N 701

Patent

active

045933154

ABSTRACT:
Plural phase detectors in a progressively scanned television receiver measure the phase of the receiver video speed-up memory read and write clocks with respect to the double line-rate horizontal sweep signal of the display. Delay means are provided for delaying the video signal recovered from the memory as a function of the difference between the read and write clock phase measurements each time the memory is read. The delay is effective for minimizing visible artifacts which otherwise may tend to occur when displaying "non-standard" video signals wherein the ratio of the color-subcarrier frequency to the line-frequency of the incoming video signal differs from a given broadcasting standard.

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ntz ARCHIV, vol. 4, Oct. 1982, D. Uhlenkamp et al., "Verbesserte Widedengabe von Norm-Fernsehsignalen" pp. 313-321.

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