Search - matlab with telephone

Search - matlab with telephone - List

[matlab] address_book DL : 0: 按照人名电话号吗的格式建立电话本，再执行时把文件名作为参数。带有语音功能。-accordance with the names of persons telephone number? Format established telephone, and implementation of the document as a parameter. With voice.
Date : 2025-12-16 Size : 5.99mb User : 杨玉
[matlab] dtmf DL : 0: Date : 2025-12-16 Size : 2kb User : 璞玉
[matlab] awgn DL : 0: DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求： (1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。 -DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.
Date : 2025-12-16 Size : 15kb User : wyyy
[matlab] DTMF DL : 0: 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
Date : 2025-12-16 Size : 1kb User : zhizhiwer
[matlab] PCM DL : 0: 利用Matlab仿真脉冲编码调制（PCM）及A律、μ律PCM对声音进行压缩编解码过程。脉冲编码调制（PCM，Pulse Code Modulation）是一种将模拟语音信号转换成数字信号的编码方式。波形编码器的作用是对采样后的信号样本进行量化和编码。从数学上来看，量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合，编码就是用一组二进制数来表示这些映射后的有限数。国际标准化的PCM采用折叠二进制码，符合长途电话质量。根据量化方法的不同，PCM可分为均匀量化PCM和对数PCM两大类，对数PCM中，2Aμ律和律编码都已被定为国际标准。-Matlab simulation using pulse code modulation (PCM) and the A law, μ law PCM codec for voice compression process. Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding. The role of the encoder waveform is sampled signal sample quantization and coding. From the mathematical point of view, the process is to quantify the magnitude of the value of a continuous set of infinite number of maps into a finite number of discrete set of amplitude values , encoding is to use a set of binary digits, said after a limited number of these maps. By folding the International Standardization of PCM binary code, in line with long-distance telephone quality. According to the different quantitative methods, PCM can be divided into uniform quantization PCM PCM and the number of two categories, on the number of PCM in, 2Aμ law and legal codes have been designated as international standards.
Date : 2025-12-16 Size : 932kb User : tanii
[matlab] matlab-gui DL : 0: 用matlab gui画信号的频谱图和时域图形,再画出语谱图，模拟电话-Picture signal with matlab gui frequency spectrum and time domain graph, then draw the language spectrum, analog telephone
Date : 2025-12-16 Size : 18kb User : 杨光
[matlab] chengxu DL : 0: 由于科学技术的飞速发展，使银行卡的使用范围不断扩大，因而出现银行卡用卡安全问题。本文主要介绍了银行卡密码泄露漏洞，对利用录音设备对手机、电话等按键式密码输入终端进录音盗取银行卡密码的不法行为进行技术分析，利用MATLAB软件编程对按键式密码输入终端的按键音进行音频分析，基于短时能量和过零率对所采集的音频文件进行端点检测，提取出单个拨号音，然后对处理后的音频进行频谱分析、对比，从而识别按键式密码输入终端的按键音。-Due to the rapid development of science and technology, the use of bank cards continued to expand, and thus to a bank card with a card security issues. This paper describes the bank card password disclosure vulnerability on the use of recording equipment on the phone, telephone touchtone input terminal password into the recording steal bank card passwords wrongful conduct technical analysis using MATLAB software programming for touchtone input terminal password keys sound audio analysis, based on short-term energy and zero-crossing rate of the acquired endpoint detection audio files, extract single dial tone, and then processed audio spectrum analysis, comparison, to identify key touchtone input terminal password sound.
Date : 2025-12-16 Size : 4kb User : 张校非