Electronic device and reception control method
View Patent ↗According to one embodiment, an electronic device receives a broadcast signal includes a high-speed transmission channel and a low-speed transmission channel. The electronic device estimates a CN when the electronic device is in an environment corresponding to a stationary state, based on a measured reception power, reception sensitivity required for receiving a broadcast service of the high-speed transmission channel and a necessary CN required for receiving the broadcast service of the high-speed transmission channel, and controls a processing of switching a demodulation target between the high-speed transmission channel and the low-speed transmission channel, based on a difference between the estimated CN and the measured CN.
1. An electronic device comprising:
a receiving unit configured to receive a broadcast signal comprising a high-speed transmission channel and a low-speed transmission channel, the high-speed transmission channel comprising different combinations of error resistance and transmissible video signal quality than the low-speed transmission channel;
a first measuring module configured to measure a carrier-to-noise power ratio (CN) of the broadcast signal;
a second measuring module configured to measure a reception power of the broadcast signal; and
a control module configured to:
estimate the CN when the electronic device is in an environment corresponding to a stationary state, based on the measured reception power, a reception sensitivity for receiving a broadcast service of the high-speed transmission channel, and a first CN for receiving the broadcast service of the high-speed transmission channel, and
switch a demodulation target broadcast service between the high-speed transmission channel and the low-speed transmission channel based on a difference between the estimated CN and the measured CN.
2. The device of claim 1 ,
wherein the control module is further configured to determine whether the electronic device is in an environment corresponding to a moving state based on the difference between the estimated CN and the measured CN, and to control a switch of the demodulation target broadcast service so that the low-speed transmission channel is used in priority to the high-speed transmission channel when the electronic device is in the environment corresponding to the moving state.
3. The device of claim 1 ,
wherein the control module is further configured to switch the demodulation target broadcast service between the high-speed transmission channel and the low-speed transmission channel based on a result of a comparison between a received signal quality of the broadcast signal and a threshold value, and to change the threshold value based on the difference between the estimated CN and the measured CN.
4. The device of claim 3 ,
wherein the control module is further configured to determine whether the electronic device is in the environment corresponding to the stationary state or a moving state based on the difference between the estimated CN and the measured CN,
the threshold value includes a first threshold value for switching from the low-speed transmission channel to the high-speed transmission channel,
the first threshold value is set to a first value when the electronic device is in the environment corresponding to the stationary state, and
the first threshold value is set to a second value higher than the first value when the electronic device is in the environment corresponding to the moving state.
5. The device of claim 3 ,
wherein the control module is further configured to determine whether the electronic device is in the environment corresponding to the stationary state or a moving state based on the difference between the estimated CN and the measured CN,
the threshold value includes a second threshold value for switching from the high-speed transmission channel to the low-speed transmission channel,
the second threshold value is set to a first value when the electronic device is in the environment corresponding to the stationary state, and
the second threshold value is set to a second value higher than the first value when the electronic device is in the environment corresponding to the moving state.
6. A reception control method for an electronic device, the method comprising:
measuring a carrier-to-noise power ratio (CN) of a broadcast signal;
measuring a reception power of the broadcast signal;
estimating the CN when the electronic device is in an environment corresponding to a stationary state based on the measured reception power, a reception sensitivity for receiving a broadcast service of a high-speed transmission channel, and a first CN for receiving the broadcast service of the high-speed transmission channel; and
controlling switching of a demodulation target broadcast service between the high-speed transmission channel and a low-speed transmission channel based on a difference between the estimated CN and the measured CN.
7. The method of claim 6 ,
wherein the controlling comprises:
determining whether the electronic device is present in an environment corresponding to a moving state based on the difference between the estimated CN and the measured CN, and
controlling switching of the demodulation target broadcast service so that the low-speed transmission channel is used in priority to the high-speed transmission channel when the electronic device is in the environment corresponding to the moving state.
8. The method of claim 6 ,
wherein the controlling comprises:
switching the demodulation target broadcast service between the high-speed transmission channel and the low-speed transmission channel based on a result of a comparison between a received signal quality of the broadcast signal and a threshold value, and
changing the threshold value based on the difference between the estimated CN and the measured CN.
9. The method of claim 8 ,
wherein the controlling comprises determining whether the electronic device is in the environment corresponding to the stationary state or a moving state based on the difference between the estimated CN and the measured CN,
the threshold value includes a first threshold value for switching from the low-speed transmission channel to the high-speed transmission channel,
the first threshold value is set to a first value when the electronic device is in the environment corresponding to the stationary state, and
the first threshold value is set to a second value higher than the first value when the electronic device is in the environment corresponding to the moving state.
10. The method of claim 8 ,
wherein the controlling comprises determining whether the electronic device is in the environment corresponding to the stationary state or a moving state based on the difference between the estimated CN and the measured CN,
the threshold value includes a second threshold value for switching from the high-speed transmission channel to the low-speed transmission channel,
the second threshold value is set to a first value when the electronic device is in the environment corresponding to the stationary state, and
the second threshold value is set to a second value higher than the first value when the electronic device is in the environment corresponding to the moving state.