Television – Synchronization – Control of picture position
Patent
1994-11-02
1996-11-12
Kostak, Victor R.
Television
Synchronization
Control of picture position
348578, H04N 504
Patent
active
055745083
ABSTRACT:
A vertical panning system comprises: a source of respective signals having a vertical synchronizing frequency, a horizontal synchronizing frequency and a multiple of the horizontal synchronizing frequency; a video display having an interlaced field mode of operation; a horizontal display control circuit coupled to the video display and responsive to the supplied horizontal synchronizing frequency signal; a digital phase delay circuit, responsive to the supplied multiple horizontal synchronizing frequency signal, the supplied vertical synchronizing frequency signal and to a panning control signal, having as an output a second vertical synchronizing frequency signal delayed in phase relative to the supplied vertical synchronizing frequency signal by any one of a plurality of delays differing in increments corresponding in duration to horizontal half line intervals; and, a vertical display control circuit coupled to the video display and responsive to the second vertical synchronizing frequency signal.
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CD 4046BM/CD4046BC Micropower Phase-Locked Loop, National Semiconductor, pp. 5-141, 5-146, 5-148.
Instruction Manual for Type: TVM 3/51 Monochrome Monitor from Barco Video Systems.
Fried Harvey D.
Kostak Victor R.
Laks Joseph J.
RCA Thomson Licensing Corporation
Tripoli Joseph S.
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