Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-12-06
1993-07-27
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358180, H04N 701
Patent
active
052314901
ABSTRACT:
The present invention relates to an apparatus for converting aspect ratio and number of scanning lines of a video signal for converting the received HDTV video signal having aspect ratio of 9 to 16 and scanning lines above 1050 into a TV video signal of NTSC standard of a zoom-up mode and a wide mode. A converting apparatus of the present invention comprises input controller(s) for controlling the field memory to write the HDTV video signal into the field memory, and output controller(s) for selecting the HDTV video signal written into the field memory according to plural modes (mode l through mode N) corresponding to the sorts of aspect ratio and scanning lines of converting video signal to be output as the NTSC TV video signal. The input controller includes a HDTV horizontal line start signal generator, a first and a second address generators, HDTV horizontal and vertical control signal generation ROMs and three logic executors; the output controller includes a signal selector, a NTSC TV horizontal line start signal generator, third and a fourth address generators, NTSC TV horizontal and vertical control signal generation ROMs and fourth and fifth logic executors.
REFERENCES:
patent: 4556906 (1985-12-01), Dischert et al.
patent: 4953025 (1990-08-01), Saitoh et al.
patent: 4984078 (1991-01-01), Skinner et al.
Kostak Victor R.
Samsung Electronics Co,. Ltd.
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