Television signal converting apparatus providing an on-screen tuning display
First Claim
1. A signal converting apparatus for television signals comprising:
- input means including RF input means for providing a plurality of modulated RF carriers;
tuning and demodulating means for selecting one of said modulated RF carriers and for developing a video signal from said selected modulated RF carrier in response to a carrier selection control signal;
selection means coupled to said tuning and demodulating means for generating said carrier selection control signal;
detection means for developing a synchronization signal responsive to said video signal;
character generator means responsive to said carrier selection control signal and to said synchronization signal for generating a character signal identifying the selected one of said RF carriers;
combining means for combining said video signal and said character signal; and
modulating means for modulating said combined video and character signals on a second radio frequency carrier signal.
2 Assignments
0 Petitions
Accused Products
Abstract
In a signal converting apparatus such as one including demodulation and remodulation apparatus for converting RF cable carriers to RF carriers having frequencies corresponding to broadcast frequencies, a character generator is coupled to the tuning selector to generate characters representative of the channel number of the selected cable carrier. The character representative signals are combined with the demodulated base-band signals before remodulation. As a result, the television receiver coupled to the cable converter will produce an on-screen display of the channel number of the selected cable channel. Similar apparatus may be employed to identify a video cassette recorder or video disc player as the source of television signals on the screen of a television receiver.
236 Citations
9 Claims
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1. A signal converting apparatus for television signals comprising:
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input means including RF input means for providing a plurality of modulated RF carriers; tuning and demodulating means for selecting one of said modulated RF carriers and for developing a video signal from said selected modulated RF carrier in response to a carrier selection control signal; selection means coupled to said tuning and demodulating means for generating said carrier selection control signal; detection means for developing a synchronization signal responsive to said video signal; character generator means responsive to said carrier selection control signal and to said synchronization signal for generating a character signal identifying the selected one of said RF carriers; combining means for combining said video signal and said character signal; and modulating means for modulating said combined video and character signals on a second radio frequency carrier signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification