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Digital Vertical Sync Regeneration for Video Display Systems Disclosure Number: IPCOM000040488D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02

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Chaney, RS Singkornrat, P Trynosky, SW [+details]


A technique is described whereby the vertical synchronization signal, as used in video display systems, is recovered from a National Television System Committee (NTSC) video composite synchronization signal, so as to provide operational stability and full logic integration capability. The concept differs from prior art analog recovery techniques in that only digital circuitry is utilized, so as to improve the accuracy of vertical synchronization recovery. The concept also provides full logic integration capability to other digital logic gate array circuitry. (Image Omitted) In prior art, the utilization of NTSC video signals required the extraction of vertical and horizontal synchronization signals so as to identify all of the transmitted information.