DTMF signal encoder and decoder design and simulation ABSTRACT
DTMF (dual tone multiple frequency) encoding is to use the synthesis of two single-tone sounds to indicate a number or symbol. DTMF decoding is to use a particular method or algorithm to recognize the synthesis of two single-tone sound, and extract information which contained within the numbers, or symbols. DTMF signal encoding and decoding has become a very mature technology, that follows the technical specification ITU Q.23. Relative to the pulse dialing, DTMF dialing method has the advantage of high rate, and applies during a call without introducing significant interference. DTMF tone encoding techniques include the occurrence and synthesis of two-tone ; DTMF decoding techniques include dual-tone detection, tone transceiver separation of synchronization and identification .Understanding and solving these technical problems has universal significance for designing in general communications equipment and systems.原文请加优~文^论,文'网QQ3249,114
On the analyzing result of some of the existing DTMF signal encoding, we has advanced a new DTMF signal encoding and decoding algorithm respectively in the paper. The result of simulation analysis on Ti TMS320C64XX DSP shows that the new DTMF signal encoding and decoding algorithm are simple and easy to realize, possess high coding efficiency, high rate to run,and decoding error rate very low , have practical application value.
Keywords: DTMF Signal Encoding DTMF Signal Decoding TMS320C64XX DSP Application
目 录
摘 要 I
ABSTRACT II
1 引言 1
2 双音多频信号技术规范 2
3 双音多频信号发生算法分析论证 3
3.1 双音多频信号发生现有算法分析 3
3.2 改进的双音多频信号发生编码算法 5
4 双音多频信号解码算法设计论证 7
4.1 双音多频信号接收解码现有算法分析 7
4.2 一种新的双音多频信号接收解码算法 8
5 C64xx DSP 性能特点 11
5.1 C64xx DSP硬件结构 11论文网http://www.youerw.com/
5.2 C64xx DSP指令系统 12
5.3 DSP集成开发工具CCS 15
6 算法实现DSP源程序注解 17
7 算法仿真结果与讨论 23
7.1 双音多频信号发生编码算法仿真结果 23
7.2 双音多频信号接收解码算法仿真结果 23
7.3 算法仿真结果讨论 23
8 结论 24
参考文献 25
附录：DTMF 编码、解码数据表 26
谢辞 29,2242