发明名称 Musical alert radio pager
摘要 A radio pager receives from a base station a paging signal consisting of an address code group and a message code group including musical note data. The receiver separates the received paging signal into the address code group and message code group. Further, the receiver separates the message code group into message data and musical note data by using a melody start symbol and a melody end symbol. Then, the receiver generates melody frequencies corresponding to the consecutive musical note data, modulates the melody frequencies to output a melody, and drives a speaker therewith.
申请公布号 US6545590(B1) 申请公布日期 2003.04.08
申请号 US19960687039 申请日期 1996.07.25
申请人 NEC CORPORATION 发明人 KATAYAMA HIDEYUKI
分类号 H04M3/42;G08B3/10;H04M1/00;H04M3/02;H04Q7/14;(IPC1-7):H04Q1/00 主分类号 H04M3/42
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