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Description: 用89c2051模拟产生dtmf信号，广泛用于防盗报警、电话数据传输等；节省发号及收号电路，成本低。-with 89c2051 simulation of DTMF signals, widely used in anti-theft alarm, telephone data transmission; Savings and resumption of the circuit, and low cost.
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Size: 2216 |
Author: 徐中阳 |
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Description: 一种51单片机接收电话线上DTMF，拨号DTMF的应用程序。-SCM receive a 51 DTMF telephone lines, dial DTMF applications.
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Size: 437182 |
Author: 孙鹏 |
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Description: • To design a GUI in MATLAB for Dual-Tone Multi-Frequency (DTMF) telephone key pad, including DTMF Signal generator and DTMF tone detector
• To simulate the DTMF signals with noise based on the specifications given.
• To decode and display the DTMF signals by using FFT algorithm
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Size: 16675 |
Author: 冯扬 |
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Description: 本文主要阐述了DTMF的原理及如何在MATLAB上产生DTMF信号，主要涉及到电话拨号音合成的基本原理及识别的主要方法，利用 MATLAB 软件以及 FFT 算法实现对电话通信系统中拨号音的合成与识别。并进一步利用 MATLAB 中的图形用户界面 GUI 制作简单直观的模拟界面。 能够利用矩阵不同的基频合成 0 － 9 不同按键的拨号音，并能够对不同的拨号音加以正确的识别，实现由拨号音解析出电话号码的过程，完成对电话拨号音系统的简单的实验仿真。
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Size: 3873 |
Author: 冯扬 |
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Description: 我编写的软件运行在dsp5000的ccs下，在 dsk5402评估板上运行，可以实现数字电话的功能。包括dtmf的软件产生等等。-I write software that runs on the dsp5000 ccs, in dsk5402 Evaluation run, can achieve a digital telephone functions. DTMF including the election of the software.
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Size: 5120 |
Author: 吕英中 |
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Description: 我编写的软件运行在dsp5000的ccs下，在 dsk5402评估板上运行，可以实现数字电话的功能。包括dtmf的软件产生等等。-I write software that runs on the dsp5000 ccs, in dsk5402 Evaluation run, can achieve a digital telephone functions. DTMF including the election of the software.
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Size: 37888 |
Author: 吕英中 |
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Description: 用89c2051模拟产生dtmf信号，广泛用于防盗报警、电话数据传输等；节省发号及收号电路，成本低。-with 89c2051 simulation of DTMF signals, widely used in anti-theft alarm, telephone data transmission; Savings and resumption of the circuit, and low cost.
Platform: |
Size: 2048 |
Author: |
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Description: 一种51单片机接收电话线上DTMF，拨号DTMF的应用程序。-SCM receive a 51 DTMF telephone lines, dial DTMF applications.
Platform: |
Size: 437248 |
Author: 孙鹏 |
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Description: • To design a GUI in MATLAB for Dual-Tone Multi-Frequency (DTMF) telephone key pad, including DTMF Signal generator and DTMF tone detector
• To simulate the DTMF signals with noise based on the specifications given.
• To decode and display the DTMF signals by using FFT algorithm
Platform: |
Size: 16384 |
Author: 冯扬 |
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Description: 本文主要阐述了DTMF的原理及如何在MATLAB上产生DTMF信号，主要涉及到电话拨号音合成的基本原理及识别的主要方法，利用 MATLAB 软件以及 FFT 算法实现对电话通信系统中拨号音的合成与识别。并进一步利用 MATLAB 中的图形用户界面 GUI 制作简单直观的模拟界面。 能够利用矩阵不同的基频合成 0 － 9 不同按键的拨号音，并能够对不同的拨号音加以正确的识别，实现由拨号音解析出电话号码的过程，完成对电话拨号音系统的简单的实验仿真。-This paper described the principle and how DTMF in MATLAB to generate DTMF signals, mainly related to the telephone dial tone of the basic principles of synthesis and identification of the main methods, the use of MATLAB software and the FFT algorithm on the telephone communication system dial tone Synthesis and Recognition . And further the use of MATLAB in the production of graphical user interface simple and intuitive GUI interface simulation. Able to take advantage of matrix synthesis of different fundamental frequency 0- 9 different keys of the dial tone and be able to different dial tone to be the correct identification, the dial tone from a telephone number to resolve the process of completion of the telephone dial tone system, a simple experiment simulation.
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Size: 4096 |
Author: 冯扬 |
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Description: 对采样的电话号码DTMF信号进行解码，获取电话号码值，也是很有意思的程序。-The sampling of telephone numbers to decode DTMF signals, to obtain the telephone number value, is also a very interesting process.
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Size: 267264 |
Author: 王朝朋 |
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Description:
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Size: 2048 |
Author: 璞玉 |
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Description: 电话机的工作原理,有振铃电路,电话极性保护电路,还有双音多频发送接收电路-Telephone the working principle, has ringing circuit, Phone polarity protection circuit, as well as send DTMF receiver circuit
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Size: 57344 |
Author: 徐徐 |
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Description: 双音多频
用matlab模仿电话机拨号，用到语音处理及合成各方面知识-DTMF telephone dial-up using matlab to imitate, to use speech processing and synthesis of knowledge
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Size: 104448 |
Author: 章鱼 |
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Description: 单音多频信号的产生和识别，采用FFT变换。应用于电话拨号。是学习数字信号处理的大作业。-Tone multi-frequency signal generation and recognition, the use of FFT transform. Applies to telephone dial-up. Digital Signal Processing is the study of large operations.
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Size: 1024 |
Author: 聂建辉 |
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Description: 很多人要电话来电显示的数据格式，我把我积累的一些经验整理了一下，主要包括DTMF、FSK两种制式。-Many people want to telephone caller ID data format, I have accumulated some experience I have compiled some, including DTMF, FSK modulation of two.
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Size: 361472 |
Author: Steven |
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Description: 双音多频 DTMF（ Dual Tone Multi-Frequency ）信号，是用两个特定的单
音频率信号的组合来代表数字或功能。在 DTMF 电话机中有 16 个按键，其中
10 个数字键 0 — 9 ， 6 个功能键 * 、 # 、 A 、 B 、 C 、 D 。其中 12
个按键是我们比较熟悉的按键，另外由第 4 列确定的按键作为保留，作为功能
键留为今后他用。 根据 CCITT 建议，国际上采用 697Hz 、 770Hz 、 852Hz 、
94lHz 低频群及 1209Hz 、 1336Hz 、 1477Hz 、 1633Hz 高频群。从低频群和高频群任意各抽出一种频率进行组合，共有 16 种组合，代表 16 种不同的数
字键或功能，每个按键唯一地由一组行频和列频组成-DTMF DTMF (Dual Tone Multi-Frequency) signal, is one of two specific
A combination of audio frequency signals to represent the number or function. In the DTMF telephone has 16 buttons, which
10 number keys 0- 9, 6 function keys*,#, A, B, C, D. 12 of them
Keys is more familiar with the keys, another set from the first four buttons as retention of a functional
Key left for future uses. According to CCITT recommendations, the international use of 697Hz, 770Hz, 852Hz,
94lHz low frequency group and 1209Hz, 1336Hz, 1477Hz, 1633Hz frequency group. From the low group and high-frequency group out of any one frequency for each combination, a total of 16 combinations, the number of representatives of 16 different
Character or function keys, each key uniquely by a group composed of row frequency and column frequency
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Size: 12288 |
Author: 李小勇 |
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Description: 实现dtmf双音多频信号的matlab仿真编码和解码，采用coertzel算法。-Methods of measurement for pushbutton telephone with DTMF
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Size: 1024 |
Author: zhizhiwer |
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Description: 通过matlabGUI设计电话拨号界面，实现电话双音多频DTMF的仿真，根据所给数据制作拨号盘，并产生相应音调。-Design by matlabGUI dial interface to achieve multi-frequency DTMF tone telephone simulation, produced according to the data dial, and generates tones.
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Size: 35840 |
Author: |
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Description: 对DTMF电话通信过程的仿真，并通过MATLAB的GUI界面模拟电话拨号，同时考虑信道的信噪比对接收端拨号探测的影响。-Using MATLAB to simulate DTMF telephone communications. Simulate dailing interface by GUI, and consider effect of channel SNR on signal detection at receiver side.
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Size: 1136640 |
Author: Wenwen |
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