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MATLAB是一个非常好的用于测量,分析和可视化的数据,控制仪器,并建立测试系统。安捷伦信号和频谱分析仪可让您分析失真,虚假的,相位噪声,用于2G到4G无线通信测量。这种Matlab下开发的高级数据可视化(ADV)的应用软件,扩展了安捷伦信号和频谱分析仪的可视化功能,提供了四个不同的显示格式:Analog Advanced, Analog Plus, Waterfall,和Spectrogram。这些显示使得更加容易捕获间歇性信号。,MATLAB is a very good for the m
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波形和频谱双显示
记录讲话直接进入MATLAB
手动分割讲话波形-创建标签文件
波形编辑-切割,复制或粘贴
共振峰分析-显示共振轨道的F1 , F2和F3
基音分析
过滤工具-语音信号滤波器截止频率
比较工具-比较两个波形的频谱距离使用几种措施
增加噪声-Dual time-waveform and spectrogram displays
Records speech directly into MATLAB NEW
Displays time-a
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To see an spectrogram of a signal non perodical
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对原始语音进行上采样和下采样,分析对比他们的时域图和频谱图。最后对比原始语音、75HZ激励、150HZ激励以及噪声激励下的效果-SOME SIMPLE MANIPULATIONS OF SOUND USING DIGITAL SIGNAL PROCESSING
The original sound and its spectrogram
Downsampling the waveform
downsampling
Upsampling the waveform
Li
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The main m-file to be executed is myLPC.m file. The file that contains all calculations is lpc_01.m file, that is a function which returns reconstructed speech signal with LPC-16 coding.
Observing Spectrogram of both signals is very instructive and
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A speech signal filterbank, using melscale frequency and framebanking.- 1. For speech signal can be represented as a discrete sequence of frames (or feature vectors) that can be used as the input to a speech recogniser. Important ideas and technique
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matlab中语谱图实现代码,语谱图表示语音信号随时间而变化的谱特性-matlab implementation code in the spectrogram, spectrogram that change over time speech signal spectral characteristics of
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信号,噪声,信号加噪声,FFT,matlab仿真,时域波形,频谱图-Signal, noise, signal plus noise, FFT, Matlab simulation, time-domain waveform, spectrogram
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傅里叶变换在MATLAB中的实现,对正选信号仿真,画出其频谱图。-Fourier transform in MATLAB realization of positive selection signal simulation, draw the spectrogram.
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是信号与系统课程的课程设计,旨在熟悉FFT 的计算过程,结合DFT 物理意义和实验结果加深
对傅立叶变换的理解。文章首先用MATLAB 对一个简单信号进行FFT 仿真,得出频谱图;其次完成了FFT 的C 语言实现,结合MATLAB 作图及数据处理功能得出了C 实现下的FFT 结果;最后,讨论分析实验结果。-Curriculum design, signals and systems courses designed to familiar FFT calculation process, t
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用MATLAB生成语谱图成序,语音信号随时间变化的频谱特性可以用语谱图表示。-Using MATLAB to generate a sequence spectrogram, speech signal time-varying spectra spectral characteristics can be expressed terminology.
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MATLAB软件平台下,利用函数wavread对语音信号进行采样,记住采样频率和采样点数;
2)画出语音信号的时域波形,对采样后的语音进行fft变换,得到信号的频谱特性;对语音信号分别加入正弦噪声和白噪声,画出加噪信号的时域波形和频谱图;
3)根据对加噪语音信号谱分析结果,确定滤除噪声滤波器的技术指标,设计合适的数字滤波器,并画出滤波器的频域响应;
4)用所设计的滤波器对加噪的信号进行滤波,在同一个窗口画出滤波前后信号的时域图和频谱图,对滤波前后的信号进行对比,分析信号变化;
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对采集的轴系平稳信号进行时域,频域仿真,得到频谱图。-Shaft for smooth signal acquisition time domain, frequency domain simulation, the spectrogram.
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STFT和ST变换的基本函数,和一个stft的一个例程-This code computes the Stockwell transform (S-Transform) of a one dimensional series without for loop, thereby making it computationally fast and simple. S-Transform was proposed in 1996. A nice tutorial on S-Transform can
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(1)录制一段语音信号,完成对信号的采样,画出信号的时域波形和频谱图,确定信号的频谱范围;
(2)给信号叠加噪声(噪声类型分为如下几种:a白噪声;b单频噪色(正弦干扰);c多频噪声(多正弦干扰);d其它干扰。),画出受噪声干扰的信号时域波形和频谱图;
(3)采用窗函数法设计FIR低通滤波器,画出滤波器的频响特性图;
(4)用所设计的滤波器对受噪声影响的信号进行滤波,画出滤波后语音信号的时域波形图和频谱图;
(5)对滤波前后的信号进行对比,分析信号的变化;回放语音信号,并与原始语音信号对比
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Signal fft transform, read the signal and fft transform, FFT transform shows the spectrogram to complete the extraction of the characteristic signal
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Downsampling audio signal and spectrogram analysis in matlab
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用于对语音信号处理的matlab程序,可用于语谱图分析,共振峰分析等。(The matlab program for speech signal processing can be used for spectrogram analysis, formant analysis and so on.)
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目前的代码是一个matlab函数,它提供给定信号x[n]的短时傅立叶变换(stft)。该函数是matlab命令“光谱图”的一个替代项。功能输出为:
1)一个具有复杂stft系数的矩阵,该矩阵具有跨列时间和跨行频率;
2)频率矢量;
3)时间矢量。
为了阐明函数的用法,给出了一个示例。为了方便起见,输入和输出参数在函数的开头给出。(The present code is a Matlab function that provides a Short-Time Fourier Transfor
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Time Frequency Toolbox matlab时频分析工具箱,里面有各种时频分析函数,用matlab实现的,小波变换,Gabor变化,短时傅里叶变换等等(AF Ambiguity function
AR Auto-regressive (filter or model)
ASK Amplitude shift keyed signal
BJD Born-Jordan distribution
BPSK Binary phase shift keyed signal
BUD
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