Search for: [Description = "There is a way to automatically wake up television receivers when a broadcaster sends out an emergency alert. In the Integrated Services Digital Broadcasting\-Terrestrial \(ISDB\-T\) digital television standard, the emergency wake\-up procedure is called an Emergency Warning System \(EWS\). In ISDB\-T, the special signal is embedded in a control message known as transmission and modulation configuration control \(TMCC\). However, improper identification of the wake\-up signal, often encountered in mobile reception, leads to unnecessary wake ups. In this paper, a method of reliably determining a wake\-up signal is proposed by assuming that broadcasters will not change the TMCC message except for the wake\-up signal when the broadcaster sends out an emergency alert. A change in the wake\-up bit leads to variation parity, and the proposed method also relies on such variations. Mutual information to be obtained by the wake\-up receiver is evaluated using the memoryless binary asymmetric channel model. Results showed that the proposed method provided mutual information even at a Eb\/N₀ being lower than 10 dB. Mutual information of the proposed method with intermittent reception is also analyzed as a function of the duty ratio of the intermittent receiver."]
