Apparatus for receiving broadcasting signals
First Claim
1. Apparatus for receiving broadcasting signals, comprising:
- signal receiving means for receiving a broadcasting signal carrying synchronous data, control information data and a plurality of groups of program information data, frequency converting means for frequency converting the broadcasting signal received by said signal receiving means to produce an intermediate frequency signal, intermediate frequency amplifying means for amplifying the intermediate frequency signal, analog to digital converting means for analog-to-digital converting the intermediate frequency signal derived from said intermediate frequency amplifying means to produce a digital intermediate frequency signal, digital demodulating means for demodulating the digital intermediate frequency signal to produce a digital demodulated signal, program selecting means for selecting one of the plurality of groups of program information data in the digital demodulated signal obtained from said digital demodulating means, information reproducing means for causing the one of the plurality of groups of program information data selected by said program selecting means to be subjected to demodulation processing to reproduce program information, and operation controlling means operative to put at least said signal receiving means, said frequency converting means and said intermediate frequency amplifying means in a reduced power consumption state in periods other than a period in which portions of the broadcasting signal, which carry the synchronous data, the control information data and the plurality of groups of program information data to be selected by said program selecting means, respectively, are able to be received by said signal receiving means.
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Accused Products
Abstract
An apparatus for receiving broadcasting signals includes a signal receiving portion for receiving a broadcasting signal, a frequency convertor for converting the broadcasting signal received by the signal receiving portion, an IF amplifier, an A/D convertor, a digital demodulator, a program selector for selecting one of plural groups of program information data obtained from the digital demodulator, an information reproducing portion for reproducing program information, and an operation controller operative to put at least each of the signal receiving portion, the frequency convertor and the IF amplifier in a reduced power consumption state in periods other than a period in which portions of the broadcasting signal, which carry the synchronous data, the control information data and the program information data to be selected by the program selector, respectively, are able to be received by the signal receiving portion.
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Citations
10 Claims
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1. Apparatus for receiving broadcasting signals, comprising:
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signal receiving means for receiving a broadcasting signal carrying synchronous data, control information data and a plurality of groups of program information data, frequency converting means for frequency converting the broadcasting signal received by said signal receiving means to produce an intermediate frequency signal, intermediate frequency amplifying means for amplifying the intermediate frequency signal, analog to digital converting means for analog-to-digital converting the intermediate frequency signal derived from said intermediate frequency amplifying means to produce a digital intermediate frequency signal, digital demodulating means for demodulating the digital intermediate frequency signal to produce a digital demodulated signal, program selecting means for selecting one of the plurality of groups of program information data in the digital demodulated signal obtained from said digital demodulating means, information reproducing means for causing the one of the plurality of groups of program information data selected by said program selecting means to be subjected to demodulation processing to reproduce program information, and operation controlling means operative to put at least said signal receiving means, said frequency converting means and said intermediate frequency amplifying means in a reduced power consumption state in periods other than a period in which portions of the broadcasting signal, which carry the synchronous data, the control information data and the plurality of groups of program information data to be selected by said program selecting means, respectively, are able to be received by said signal receiving means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification