Video subsystem for a hybrid videotex facility
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United States of America Patent
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-
Oct 7, 1986
Grant Date -
N/A
app pub date -
Feb 11, 1985
filing date -
Feb 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A video subsystem for a hybrid teletex facility includes a computer-based video control unit coupled to a general purpose interface bus, such as the IEEE 488, capable of parallel data transfer at the requisite rate. Appended from the bus are a plurality of microprocessor-based video cluster controllers for supervising the retrieval of selected video segments from randomly accessible storage media, i.e., video discs. The selected video segments are frequency translated through associated video modulators and thereafter coupled, under supervision of the video controller, through a video switch to selected broadcast frequency modulators. The outputs of the broadcast modulators are arranged by a video combiner into a composite NTSC video signal suitable for transmission or, for example, a CATV system.
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