RECEPTION DEVICE, RECEPTION METHOD, AND PROGRAM
There is provided a reception device which receives signals compliant with a DVB-T2 standard which possibly includes a plurality of different profiles, and demodulates only a signal having a profile first received or only a signal having a predetermined profile, of the received signals.
1 . A reception device which receives signals compliant with a DVB-T2 standard which possibly includes a plurality of different profiles, and demodulates only a signal having a profile first received or only a signal having a predetermined profile, of the received signals.
2 . A reception device comprising:
a receiver which receives signals compliant with a DVB-T2 standard which possibly includes signals having a plurality of different profile types;
a demodulator which demodulates the signals received by the receiver; and
a signal controller which supplies only a signal having a profile type first received, of the signals received by the receiver, to the demodulator.
3 . The reception device according to claim 2 , wherein
the signals include profile information indicating profile types which are configurations of the signals,
the reception device further includes a profile information recognizer which recognizes the profile information indicating the profile types which are the configurations of the signals received by the receiver, and
based on the profile information, the signal controller supplies only a signal having a profile first recognized by the profile information recognizer, as a signal having a profile first received, to the demodulator.
4 . The reception device according to claim 2 , wherein
the profile types include T2-Base and T2-Lite.
5 . The reception device according to claim 2 , further comprising:
a register which registers a profile type of a signal demodulated by the demodulator when the signal has been correctly demodulated,
wherein the signal controller supplies only a signal having a profile first received, of the received signals, to the demodulator, for each of frequencies of the received signals, and
the register registers a profile type of a signal correctly demodulated by the demodulator, for each of the frequencies.
6 . The reception device according to claim 5 , wherein
the profile type is registered by the register, and then the signal controller supplies only a signal having a profile different from a type of profile first received, of the received signals, to the demodulator, for each of the frequencies of the received signals.
7 . The reception device according to claim 6 , wherein
the signal includes a mixture signal indicating whether the signal includes a signal having only a single profile type or a mixture of signals having at least two profile types,
the reception device further includes a mixture recognizer which, based on the mixture signal, recognizes whether the signal includes the signal having only a single profile type or the mixture of signals having at least two profile types, and
when the profile is registered by the register, and then the mixture recognizer recognizes, based on the mixture signal, that the signal includes the mixture of signals having at least two profile types, the signal controller supplies only a signal having a type of profile different from the profile first received, of the received signals, to the demodulator, for each of the frequencies of the received signals.
8 . The reception device according to claim 5 , wherein
when the profile information recognizer does not recognize, a predetermined number of consecutive times, a signal having a predetermined profile type at a predetermined frequency, of information of a profile of each frequency registered in the register, the signal controller supplies only a signal having a profile different from the predetermined profile to the demodulator, and when the profile information recognizer does not recognize the signal a predetermined number of consecutive times, the signal controller then supplies only a signal having another different profile to the demodulator.
9 . A reception method comprising the steps of performing:
a reception process which receives signals compliant with a DVB-T2 standard which possibly includes signals having a plurality of different profile types;
a demodulation process which demodulates the signals received by the reception process; and
a signal control process which subjects only a signal having a profile type first received, of the signals received by the reception process, to the demodulation process.
10 . A program for causing a computer to execute:
a reception step of receiving signals compliant with a DVB-T2 standard which possibly includes signals having a plurality of different profile types;
a demodulation step of demodulating the signals received by a process of the reception step; and
a signal control step of subjecting only a signal having a profile type first received, of the signals received by the process of the reception step, to a process of the demodulation step.