Hybrid analog/digital television transmission system
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United States of America Patent
Stats
-
Jul 2, 1996
Grant Date -
N/A
app pub date -
Mar 31, 1995
filing date -
Mar 31, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system and method for providing a video signal during the delay time between when a new channel is selected and when the digital picture is acquired and displayed is disclosed. In particular, the system provides an NTSC-like analog video signal along with a conventional digital television signal such that when a user initially makes a new channel selection, the analog video signal, which can be quickly and easily decoded, is presented for display until the digital television signal is completely decoded and acquired. As soon as the digital television signal is ready for display, the displayed signal switches from the analog video signal to the digital television signal. For purposes of conserving frequency spectrum, the analog video signal is a simple NTSC-like monochrome (i.e., black and white) signal and limited to a 1 MHz band of the available 6 MHz spectrum allocated for each channel.
First Claim
Family
International Classification(s)
Cited Art Landscape
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