Sanyo Electric Co., Ltd.

Yasuyuki Ikeguchi

Nobukazu Hosoya

Hirotsugu Murashima

Yoshichika Hirao

Kazunori Nohara

Toru Shibusawa

Tooru Sasaki

Tatsuya Hosomi

A receiver has a tuner for receiving a TV broadcast program and a modem for receiving an e-mail. Also, the receiver outputs a message if there exists any unopened e-mail. In addition, the receiver has a camera for sending a videophone image. A viewer in front of the receiver is recognized, and it is determined whether or not the recognized viewer matches the addressee of the unopened e-mail. If a result of the determination is negative, a message output operation is prohibited.

Receiver

Each of channel searching means comprises means for judging, when a search for the subsequent channel is started, whether or not receivable channel information or information indicating that receiving is impossible is stored in a channel map with respect to the subsequent channel, means for starting the search for the subsequent channel when the receivable channel information or the information indicating that receiving is impossible is not stored in the channel map with respect to the subsequent channel, and means for terminating the channel search when the receivable channel information or the information indicating that receiving is impossible is stored in the channel map with respect to the subsequent channel.

Broadcasting receiver and channel searching method in broadcasting receiver

A PLL circuit compares a PCR with the output frequency of a voltage controlled oscillator (VCO), and returns a voltage value which is the result of the comparison to the VCO, so that a reference clock corresponding to the PCR is outputted from the VCO. A switch supplies a control voltage from the PLL circuit to the VCO when digital broadcasting is viewed, while feeding a fixed voltage from a fixed voltage power supply to the VCO when analog broadcasting is viewed, to stably output a clock having a frequency of 27 MHz irrespective of the change in the PCR.

Broadcasting receiver

A receiving section for digital television broadcasting and a receiving section for analog television broadcasting are provided. When a digital television broadcasting program is selected, it is judged whether or not an analog television broadcasting program having the same contents as those of the selected digital television broadcasting program is being broadcast. In a case where the analog television broadcasting program having the same contents as those of the selected digital television broadcasting program is being broadcast, when the digital television broadcasting program cannot be received, the analog television broadcasting program having the same contents as those of the selected digital television broadcasting program is received and outputted.

Television receiving method and television receiver

A fine color video signal including a fine component in a high frequency area has a level of an upper side band of the fine component raised by a predetermined level after FM modulation. An amplitude of the FM modulated color video signal is limited by a limiter amplifier, and as a result, levels of both the side bands become the same as an intermediate level between both the side band levels before limitation of the amplitude. Such an FM modulated color video signal is optically recorded on a video disc. In reproducing, a video disc player limits an amplitude of the reproduced FM color video signal after removal of the high frequency component thereof. Thus, both the side bands of the fine component become the same as a level of half the lower side band level before limitation of amplitude. Such an FM modulated color video signal is FM demodulated to be a fine color video signal.

Method of recording fine color video signal on optical recording media

A peak holding circuit comprises a capacitor for holding signal charges corresponding to a peak level of an input signal, and a current amplifier circuit comprising transistors connected in a triple darlington manner for supplying an output current corresponding to the held charges. An emitter of a transistor in the first stage out of the transistors connected in a darlington manner is connected to a collector of another transistor through which a collector cut-off current flows which is approximately equal to a collector cut-off current flowing through the transistor in the first stage. The other transistor has its emitter connected to ground. Therefore, the collector cut-off current flowing through the transistor in the first stage is cancelled, so that fluctuations in output current can be prevented even if a large reactive current is not allowed to flow through a transistor in the final stage out of the transistors connected in a darlington manner.

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Hyogo, Japan

Yasuyuki Ikeguchi