发明名称 |
SIGNAL PROCESSING METHOD FOR A WALKIE-TALKIE DEVICE |
摘要 |
A walkie-talkie device applies a continuous tone-coded squelch system (CTCSS) to control signal transmission. The walkie-talkie device has an analog-to-digital converter, a digital signal processor, and a digital-to-analog converter. The signal processing method includes using the analog-to-digital converter to convert a first analog signal into a first digital signal, using the digital signal processor to handle a CTCSS tone related to the first digital signal for generating a second digital signal, and using the digital-to-analog converter to convert the second digital signal into a second analog signal. The walkie-talkie device uses the CTCSS tone to discriminate a required speech signal from other speech signals transmitted by the same physical channel.
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申请公布号 |
US2004203511(A1) |
申请公布日期 |
2004.10.14 |
申请号 |
US20030249151 |
申请日期 |
2003.03.19 |
申请人 |
HSU JANY-YEE;HSIEH CHAU-KAI |
发明人 |
HSU JANY-YEE;HSIEH CHAU-KAI |
分类号 |
H04B1/38;(IPC1-7):H04B1/38 |
主分类号 |
H04B1/38 |
代理机构 |
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