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| The emergency warning broadcast system automatically activates receivers when a disaster happens, such as an earthquake or Tsunami, to deliver disaster-related information to listeners/viewers. Unlike communications systems, which suffer from line congestions (traffic jams in the network), broadcasting can deliver emergency information instantly to a large number of people. Our recent developments in this field include an emergency warning broadcast compatible adaptor that can be connected to a One-Seg receiver for digital terrestrial broadcasting. We also developed a small, inexpensive emergency warning broadcast compatible AM/FM radio using a one-chip microcomputer. |
- The low power consumption achieved by performing intermittent reception of the One-Seg activation flag, which is transmitted approximately every 0.2 seconds, showed the prospect of continuous standby operation for about two weeks without recharging.
- Among the 432 carriers used for One-Seg service, four carriers transmit the activation flag for emergency warning broadcasting. Increasing this to all four carriers, from the previously used two carriers that transmitted the activation flag signal, improved reception sensitivity without increasing power consumption.
- As for the AM/FM radio, we dramatically reduced power consumption and device size by incorporating a general-purpose microcomputer chip for home appliances.
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| We will work toward the actual implementation of a One-Seg receiver and radio receiver with the emergency warning broadcast reception function. |
One-Seg emergency warning broadcast reception adaptor
Compact emergency warning broadcast
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