Apparatus for detecting and displaying supplementary program
First Claim
1. An apparatus for detecting and displaying a supplementary program comprising:
- a receiving means for receiving a television signal;
a video processing means for processing the signal received by said receiving means and producing a video signal;
a decoding means for detecting data information contained in the video signal and decoding the data information to obtain a supplementary program signal;
a synthesizing means for synthetically combining the video signal and the supplementary program signal into a display signal and producing the display signal to a display unit; and
a system control means for usually maintaining said decoding means in a standby state, initiating a decoding operation once the data information is detected in said video signal, notifying on a screen that a supplementary program is available when said decoding means detects the data information, and adding the supplementary program signal to the display signal.
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Accused Products
Abstract
A teletext/data transmission decoder decodes information on characters and graphics and produces a supplementary program video signal. A proper program video signal arriving by way of a video processing circuit and a display image processing section and the supplementary program video signal coming from the decoder are synthetically combined by a synthesizing section and fed to a display unit. A system controller sets the decoder in a waiting state. If the proper program video signal contains data information, the system controller automatically starts a decoding operation and controls the synthesizing section to display the restored signal on the display unit. When an automatic display select switch is set to an automatic display mode, a supplementary program processing mode is automatically selected when a supplementary program is started.
93 Citations
11 Claims
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1. An apparatus for detecting and displaying a supplementary program comprising:
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a receiving means for receiving a television signal; a video processing means for processing the signal received by said receiving means and producing a video signal; a decoding means for detecting data information contained in the video signal and decoding the data information to obtain a supplementary program signal; a synthesizing means for synthetically combining the video signal and the supplementary program signal into a display signal and producing the display signal to a display unit; and a system control means for usually maintaining said decoding means in a standby state, initiating a decoding operation once the data information is detected in said video signal, notifying on a screen that a supplementary program is available when said decoding means detects the data information, and adding the supplementary program signal to the display signal. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for detecting and displaying a supplementary program comprising:
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a receiving means for receiving a television signal; a video processing means for processing the signal received by said receiving means and producing a video signal; a decoding means for detecting data information contained in the video signal produced by said video processing means and decoding the data information to obtain a supplementary program signal; a synthesizing means for combining the video signal and the supplementary program signal into a display signal and producing the display signal to a display unit; and a system control means for usually maintaining said decoding means in a standby state, initiating a decoding operation and a viewer notification when said decoding means detects the data information, and enabling said synthesizing means. - View Dependent Claims (8, 9, 10, 11)
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7. An apparatus for detecting and displaying a supplementary program comprising:
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a receiving means for receiving a television signal; a video processing means for processing the signal received by said receiving means and producing a video signal; a decoding means for detecting data information contained in the video signal produced by said video processing means and decoding the data information to obtain a supplementary program signal; a synthesizing means for combining the video signal and the supplementary program signal into a display signal and producing the display signal to a display unit; and a system control means for initiating a decoding operation and a viewer notification when said decoding means detects the data information and enabling said synthesizing means.
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Specification