Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1982-06-24
1984-10-09
Martin, John C.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 16, H04N 942
Patent
active
044764847
ABSTRACT:
The present invention relates to a compatible high-definition television (CHDTV) color picture signal which is capable of conversion by simple and inexpensive means into either a HDTV composite color picture signal for use by a HDTV receiver or an associated conventional television system (ACTS) color picture signal for use by an ACTS receiver. The present CHDTV color picture signal comprises (a) a first line scan rate which is the same as that of the ACTS signal, (b) a first line signal of a HDTV camera signal produced at a second line scan rate which is time stretched and transmitted as is at the first line scan rate in a first portion of the CHDTV signal bandwidth, and (c) a second line signal of the HDTV camera signal which is time streched and transmitted as a line differential signal on a vestigial sideband carrier signal in a second portion of the HDTV signal bandwidth.
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AT&T Bell Laboratories
Martin John C.
McDowell E. A.
Pfeifle Erwin W.
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