Broadcasting system discriminating television receiver for differentiating between analog and digital telecast signals

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The Kabushiki Kaisha Toshiba patent solves the following problem:

FIG. 1 is a block diagram showing the configuration of the conventional Analog and digital television (TV) sets received. The signal input from the antenna 61 distributed either in a system for receiving an analog broadcast systems or D for receiving digital broadcasts.

Our analysis of this patent is as follows:

Kabushiki Kaisha Toshiba’s patent US 5598221 A deals with Broadcasting system discriminating television receiver for differentiating between analog and digital telecast signals.
A broadcast system in doubt television receiver includes a circuit used in FM demodulation discrimination output of FM demodulator with an analog broadcast, or a circuit for use in a video signal discrimination in a video output connected to a circuit for use in an I / Q-wave detection output an I / Q detector or a circuit for use in a video signal discrimination in a video output, and means controlling a signal selector switch (HK) after the channel selector judging from the results of the discriminator.

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