| 摘要 |
<P>PROBLEM TO BE SOLVED: To transmit simply and instantly a message to a portable terminal of a singer, during Karaoke. Ž<P>SOLUTION: A portable terminal wherein a Karaoke utilizing program is started transmits a log-in request telegraphic message including a portable terminal ID, and a Karaoke device records the portable terminal ID in a log-in terminal management table. When a log-in permission telegraphic message is returned, the portable terminal transmits a telegraphic message to reserve performance of desired music. The Karaoke device manages a music ID and the portable terminal ID, plays the music corresponding to the music ID in the order of reception, transmits a message permission telegraphic message to each portable terminal ID in the log-in terminal management table other than a valid message address ID by treating a corresponding portable terminal ID as the valid message address ID only during performance of the music, and transmits a message notification telegraphic message to a portable terminal corresponding to the message address ID, when receiving a message input telegraphic message including message data transmitted from a responding portable terminal during a term of validity of the message address ID. The portable terminal can read the message data. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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