Television – Image signal processing circuitry specific to television – Switching
Patent
1995-04-19
1996-09-17
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Switching
348704, 348569, 348722, 348839, H04N 5262
Patent
active
055573428
ABSTRACT:
A video display system that includes a housing has arranged thereon a plurality of video input terminals for receiving a plurality of video signals having different scanning frequencies. An expansion/compression processing circuit replaceably mounted on the housing receives and expands/compresses the plurality of video signals and produces at least one video signal expanded/compressed in synchronism with a sync signal selected by a sync switching circuit. At least one of the video signals is synthesized with another video signal, and the synthesized video signal is produced by a video signal synthesis circuit. A video signal from the video signal synthesis circuit is used to generate a video display signal in synchronism with the sync signal. This video display signal is applied to a display. At least one such video display system, an AV controller, a central control console and a lecture table are combined to realize a screen display system.
REFERENCES:
patent: 5010392 (1991-04-01), Croll
patent: 5187575 (1993-02-01), Lim
patent: 5204662 (1993-04-01), Oda et al.
patent: 5257106 (1993-10-01), Maruoka
patent: 5325131 (1994-06-01), Penney
patent: 5339111 (1994-08-01), Park
Eto Masahiro
Inoue Fumio
Maruyama Atsushi
Ogino Masanori
Urata Hiroyuki
Hitachi , Ltd.
Kostak Victor R.
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