Television – Nonpictorial data packet in television format – Including teletext decoder or display
Patent
1996-05-15
1998-01-13
Kostak, Victor R.
Television
Nonpictorial data packet in television format
Including teletext decoder or display
348564, H04N 7087
Patent
active
057084750
ABSTRACT:
A receiving apparatus including first and second tuners for receiving telecast signals and demodulating the signals of predetermined channels; a decoder for extracting the character broadcast data from either of the demodulated signals and decoding the extracted data; a selector switch for selecting either of the signals obtained from the first and second tuners and supplying the selected signal to the decoder; a controller for controlling the selector switch during its selection of the output signal from the second tuner in such a manner as to force the switch to periodically select the demodulated signal outputted from the first tuner; and a detector for detecting whether the character broadcast data extracted by the decoder represent a caption or not when the switch has selected the output signal from the first tuner; wherein, if the result of the detection by the detector signifies that the character broadcast data represent a caption, the controller forces the switch to select the output signal from the first tuner. In this apparatus, when any caption broadcast is started by teletext, priority display of the caption can be realized without enlarging the apparatus structure or raising the production cost thereof.
REFERENCES:
patent: 5023721 (1991-06-01), Moon-Hwan
patent: 5128766 (1992-07-01), Choi
patent: 5477274 (1995-12-01), Akiyishi et al.
patent: 5500680 (1996-03-01), Lee
patent: 5602598 (1997-02-01), Shintani
patent: 5610664 (1997-03-01), Bobert
Hayashi Toshihide
Morisawa Akiko
Kostak Victor R.
Maioli Jay H.
Sony Corporation
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