Patent ID: 6011594
Filing Date: 2000-01-04
Classification: H04N

Abstract:
A television device having a text data processing function comprising:reception means having at least first and second tuners and capable of receiving and demodulating television broadcasting signals of two channels;video signal processing means for independently displaying a video signal which is a reception signal of said first tuner or compressing at least one of video signals which are reception signals of said first and second tuners to simultaneously display the video signals on a display device;selector means for selectively deriving the television broadcasting signals received by said first and second tuners;text receiving/demodulating means for receiving an output of said selector means and receiving and demodulating transmitted text data superposed on a data channel contained in the television broadcasting signal and independent from the video/audio signal thereof;text synthesizing means for synthesizing the text data demodulated by said text receiving/demodulating means with an output of said video signal processing means;synchronization separation means for separating a synchronizing signal from an output of said selector means; andswitching control means for controlling the switching operation of said selector means in a period other than the vertical blanking period based on the synchronizing signal from said synchronization separation means after the channel selection becomes stable in a case where a selected channel of said first tuner is switched to a channel selected by said second tuner.