| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital broadcast receiver that can always receive emergency alarm signals, even when not supplied with electric power from an external power source, present an emergency alarm in a short time after receiving the emergency alarm signal, and receive the emergency alarm signal over a long time, even at power failure. SOLUTION: A TS decoder 43 outputs an emergency alarm reception signal C14 to a CPU 24, when a TS packet includes a flag indicating that the emergency alarm signal is being broadcast. An emergency voice generating circuit 25 outputs an emergency voice analog signal, corresponding to an emergency voice. A solar power generator 12 of an antenna unit 10 converts sunlight into electric power and outputs the electric power to a capacitor 51 in a capacitor circuit 50. A power supply switching unit 21 supplies electric power from an AC power source 61 or the electric power from the capacitor 51 to respective components, according to the voltage value of a power circuit 22. COPYRIGHT: (C)2007,JPO&INPIT
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