Signal quality monitoring apparatus and method
According to one embodiment, a signal quality monitoring apparatus includes a signal processor, a comparator and a determiner. The processor obtains output signals from a first transmitter and a second transmitter which are mutually redundant and respectively reproduce digital broadcast signals based on a common origin signal, and generates a first signal based on the output signal from the first transmitter and a second signal based on the output signal from the second transmitter. The comparator compares the first signal and the second signal. The determiner determines a quality of the digital broadcast signal based on a result of the comparison.
1. A signal quality monitoring apparatus comprising:
a signal processor configured to obtain output signals from a first transmitter and a second transmitter which are mutually redundant and respectively reproduce digital broadcast signals based on a common origin signal, and generate a first signal based on the output signal from the first transmitter and a second signal based on the output signal from the second transmitter;
a comparator configured to compare the first signal and the second signal; and
a determiner configured to determine a quality of the digital broadcast signals based on a result of the comparison,
wherein the signal processor comprises:
a first demodulator configured to demodulate the output signal from the first transmitter to generate a first constellation signal; and
a second demodulator configured to demodulate the output signal from the second transmitter to generate a second constellation signal, and
wherein the comparator compares the first constellation signal and the second constellation signal.
2. The signal quality monitoring apparatus according to claim 1 , wherein the output signals from the first transmitter and the second transmitter are pre-transmission output signals before being output to an air region.
3. A signal quality monitoring apparatus comprising:
a signal processor configured to obtain output signals from a first transmitter and a second transmitter which are mutually redundant and respectively reproduce digital broadcast signals based on a common origin signal, and generate a first signal based on the output signal from the first transmitter and a second signal based on the output signal from the second transmitter:
a comparator configured to compare the first signal and the second signal; and
a determiner configured to determine a quality of the digital broadcast signals based on a result of the comparison,
wherein the signal processor comprises:
a demodulator configured to demodulate the output signal from the first transmitter to generate a first constellation signal; and
a modulator configured to modulate a broadcast transport stream signal to generate a transmission constellation signal, and
wherein the comparator compares the first constellation signal and the transmission constellation signal.
4. The signal quality monitoring apparatus according to claim 3 , wherein the signal processor further comprises a delay regulator configured to regulate a delay amount of the first constellation signal and the transmission constellation signal, which are compared by the comparator.
5. A signal quality monitoring apparatus comprising:
a signal processor configured to obtain output signals from a first transmitter and a second transmitter which are mutually redundant and respectively reproduce digital broadcast signals based on a common origin signal, and generate a first signal based on the output signal from the first transmitter and a second signal based on the output signal from the second transmitter:
a comparator configured to compare the first signal and the second signal; and
a determiner configured to determine a quality of the digital broadcast signals based on a result of the comparison,
wherein the signal processor
comprises a demodulator configured to demodulate the output signal from the first transmitter to generate a first constellation signal, and
wherein the comparator compares the first constellation signal and a reception constellation signal of the second transmitter.
6. The signal quality monitoring apparatus according to claim 5 , wherein the signal processor further comprises a delay regulator configured to regulate a delay amount of the first constellation signal and the reception constellation signal, which are compared by the comparator.
7. A signal quality monitoring method applied to a signal quality monitoring apparatus configured to obtain output signals from a first transmitter and a second transmitter, which are mutually redundant and respectively reproduce digital broadcast signals based on a common origin signal, the method comprising:
generating, by the signal quality monitoring apparatus, a first signal based on the output signal from the first transmitter;
generating, by the signal quality monitoring apparatus, a second signal based on the output signal from the second transmitter;
comparing, by the signal quality monitoring apparatus, the first signal and the second signal; and
determining, by the signal quality monitoring apparatus, a quality of the digital broadcast signals based on a result of the comparison,
wherein the generating, by the signal quality monitoring apparatus, the first signal demodulates the output signal from the first transmitter to generate a first constellation signal:
wherein the generating, by the signal quality monitoring apparatus, the second signal demodulates the output signal from the second transmitter to generate a second constellation signal, and
wherein the comparing compares the first constellation signal and the second constellation signal.