PROBLEM TO BE SOLVED: To reduce the used data memory quantity of a BPF(Band-Pass Filter) when realizing operations with a DSP(Digital Signal Processor). SOLUTION: 1st/2nd BPFs 1/2 make the frequency signals of predetermined areas included in digital signals inputted according to 1st/2nd ...
(X=3 & Y=4) ch=*;else if(X=3 & Y=6) ch=#;else if(X=0 & Y=7) ch=A;else if(X=1 & Y=7) ch=B;else if(X=2 & Y=7) ch=C;else if(X=3 & Y=7) ch=D; if(ch!=e) /满足以上一种情况,则输出检测的信号 printf(The DTMF signal is %c.rn,ch); else /以上情况都...
Reiz Romulus,Gordan Cornelia.Using Advanced Signal Processing Methods for DTMFDetection. . 2010Reiz Romulus,Gordan Cornelia.Using Advanced Signal Processing Methods for DTMFDetection.. 2010Using Advanced Signal ProcessingMethods for DTMF Detection. Romulus R,Cornelia G,Purcaru D. Journal of Electrical and...
Multi-frequencyDTMFSignalGenerationandDetectionAbstractDTMFDualTone Multi-FrequencysignalinginthewidelyusedworldwidesignalingtheDTMFgeneration anddetectionintegratedwithdigitalsignalprocessorDSPsystemisamorevalue engineering.DTMFtelephonenumberastoachieveafastandreliabletransmission technologyithasastronganti-interferenceabilityand...
摘要: PROBLEM TO BE SOLVED: To provide a DTMF signal detection system that decides the number of DFT(Discrete Fourier Transform) samples and a frequency point from a sampling frequency and a frequency of a tone signal configuring a DTMF signal so as to detect the DTMF signal....
DTMF Signal Detection and Recognition Based on DSP 2 吕梁学院毕业设计(论文) ABSTRACT With the development of society, the signal generator has been widely used in radar application, communication system of simulation and test, the national defense, scientific research and industry. But with the...
In particular, the apparatus for use in connection with an interface which receives an analog signal from and applies an analog signal to a telephone line, the apparatus including: (a) detection means, responsive to an analog signal received from the interface, for detecting DTMF signals in the...
DTMF Signal Detection and Recognition Based on DSP ABSTRACT With the development of society, the signal generator has been widely used in radar application, communication system of simulation and test, the national defense, scientific research and industry. But with the development of society and the...
Keywords:DTMFsignaldetection;Goertzelalgorithm;parameteroptimization;FFTalgorithm 测过程中N选取不当造成的频率区分度差的问题。为 DTMF信号检测时正确选取参数提供了理论依据。 0引言 双音多频信号(DualToneMultipleFrequency, DTMF)最初是由美国贝尔实验室研制。作为实现电话 号码快速可靠传输的一种技术,它具有很强的抗...
DETECTION OF DTMF SIGNAL 优质文献 相似文献The FPGA Implementation of Modified Goertzel Algorithm for DTMF Signal Detection This paper discusses the FPGA implementation of modified Goertzel Algorithm for the application of DTMF signal detection, which is as effective as that of ... ...