Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1984-06-29
1986-12-23
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358141, 358 14, H04N 1106, H04N 706
Patent
active
046315748
ABSTRACT:
A television (TV) system having a fully compatible high-definition signal with extended aspect ratio information receivable at conventional resolution by conventional TV receivers without auxiliary apparatus with one TV channel carrying the conventional TV signal while high-frequency luminance and chrominance information plus extended aspect ratio information are provided in a second TV channel. The television system uses a video camera that produces the Y, I, and Q video signals with a bandwidth of 9.4 megahertz (MHz). These, Y, I, and Q signals have already been line decimated to 525 lines per frame with a scan rate of the standard 15.7 kiloherts (kHz). The resulting 63.5 microseconds line scan time comprises 42 microseconds of center information and 10.5 microseconds of edge information with 11 microseconds being allowed for the blanking and synchronization interval. The low-frequency center luminance and chrominance information is first time expanded and inserted into the first channel, and the high-frequency center chrominance and luminance information is time expanded and inserted into the second channel. The extended aspect ratio chrominance and luminance information is contained within the edge information and is transmitted during the horizontal retrace interval in the second TV channel.
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LoCicero Joseph L.
Pazarci Melih
Rzeszewski Theodore S.
AT&T Bell Laboratories
Moran John C.
Shepperd John W.
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