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Description: fft示範,取前10 waves,X-Hz,Y-phase angle-fft demonstrations, for the first 10 waves, X-Hz, Y-phase angle
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Size: 1024 |
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Description: This simulation script set allows for an OFDM transmission to be
simulated. Imagetx.m generates the OFDM signal, saving it as a
windows WAV file. This allows the OFDM signal to be played out a sound
card and recorded back. Imagerx.m decodes the WAV to extract the
data.
settings.m contains all the common settings to specify all the
simulation parameters such as FFT size, number of carriers,
input data source file, input and output WAV files, etc.
-This simulation script set allows for an OF DM transmission to be simulated. Imagetx.m gen erates the OFDM signal. saving it as a WAV file windows. This allows the O FDM signal to be played out a sound card and recor ded back. Imagerx.m decodes the WAV to extract t he data. settings.m contains all the common set tings to specify all the simulation parameters such as FFT size, number of carriers, input data source file, input and output WAV files, etc..
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Size: 161792 |
Author: baoruihan |
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Description: 采用MATLAB分析WAV文件。
步骤一：选择一个WAV文件作为分析的对象 。（ding.wav）
步骤三：进行 FFT变换并画频域图形 。
步骤四：进行该声波主要频谱的分析。
步骤五：根据该声音的频谱，反演时域图形 。（有失真）
步骤六：进行付立叶逆变换IFFT并画频域图形 。-WAV file analysis using MATLAB. Step One: Select a WAV file as the target of analysis. (Ding.wav) Step Three: Transform and painting to FFT frequency domain graphics. Step four: the main frequency spectrum of the acoustic analysis. Step 5: According to the sound spectrum, inversion of time-domain graphics. (With distortion) Step six: to carry out inverse Fourier transform frequency domain IFFT and painted graphics.
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Size: 64512 |
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Description: 请认真阅读采用MATLAB分析WAV文件。
步骤一：选择一个WAV文件作为分析的对象 。（ding.wav）
步骤三：进行 FFT变换并画频域图形 。
步骤四：进行该声波主要频谱的分析。
步骤五：根据该声音的频谱，反演时域图形 。（有失真）
步骤六：进行付立叶逆变换IFFT并画频域图形 。-Please carefully read the WAV files using MATLAB analysis. Step One: Select a WAV file as the target of analysis. (Ding.wav) Step Three: Transform and painting to FFT frequency domain graphics. Step four: the main frequency spectrum of the acoustic analysis. Step 5: According to the sound spectrum, inversion of time-domain graphics. (With distortion) Step six: to carry out inverse Fourier transform frequency domain IFFT and painted graphics.
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Size: 64512 |
Author: 李南 |
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Description: 选取windows系统自带的ding.wav信号作为分析对象，在Matlab软件平台下，利用函数wavread对音频信号进行采样，记住采样频率和采样点数，听一下原始声音sound(y, fs, bits)。
（2）音频信号的频谱分析，先画出音频信号的时域波形；然后对音频号进行快速傅里叶变换fft(y,N)，N取32768，画出信号的频谱特性，加深对频谱特性的理解。
（3）根据频谱，反演时域特性，画出时域波形。寻找幅值最大的两个频率，此频率除以fft点数在乘以采样频率就是信号的主频，即可合成信号的时域图形，听一下声音。
（4）对原音频信号进行1024点的分段付立业分析meshgrid
（5）根据主要频线合成音频，并画出时域图形，试听合成效果。
（6）采用线性插值（linspace）和傅立业反变换(fliplr, ifft)分别合成音频，并画出时域图形，试听效果。
-err
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Size: 1024 |
Author: 何亮 |
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Description: OFDM信号的编码译码仿真，英文说明更详细。-This simulation script set allows for an OFDM transmission to be
simulated. Imagetx.m generates the OFDM signal, saving it as a
windows WAV file. This allows the OFDM signal to be played out a sound
card and recorded back. Imagerx.m decodes the WAV to extract the
data.
settings.m contains all the common settings to specify all the
simulation parameters such as FFT size, number of carriers,
input data source file, input and output WAV files, etc.
See settings.m for more details.
Note: The both the receiver and transmitter must have a copy of the
input data file, as this is used for calculating the exact number
of data words in the transmission.
The scripts should work as extracted. Just run imagetx.m to generate the
OFDM signal. Then run imagerx.m to decode the signal. The initial settings
transmit a wave file Corrs.wav . The decoded OFDM data ( Out.wav ) can be
compared with the original data by listening to the two wave files.
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Size: 59392 |
Author: 以琳 |
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Description: function pitchwatch(x,Ts)
Plot the pitch keys.
pitchwatch(x,[Ts])
:: Syntax
The array x is the input signal and Ts is the (optional) sampling period.
Example on use: [x,Fs] = wavread( Hum.wav )
pitchwatch(x,1/Fs)
:: Information
Make your own wav-files with the Windows Sound Recorder. Choose the attributes
PCM 8000Hz, 16bit, Mono when saving the wav-file-function pitchwatch(x,Ts)
Plot the pitch keys.
pitchwatch(x,[Ts])
:: Syntax
The array x is the input signal and Ts is the (optional) sampling period.
Example on use: [x,Fs] = wavread( Hum.wav )
pitchwatch(x,1/Fs)
:: Information
Make your own wav-files with the Windows Sound Recorder. Choose the attributes
PCM 8000Hz, 16bit, Mono when saving the wav-file
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Size: 99328 |
Author: michael4u2345 |
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Description: 观测实时模拟信号（语音）的频谱
用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图。
-Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of voice, voice saved as. Wav format. Wav file of the sub-Fourier transform analysis to make. Speech is divided into syllables, it should be sub-analysis, and practical application of digital signal processing of the FFT points is limited, generally only reach 1000 points. Fourier inverse transform IFFT, to restore the signal from the frequency domain. Draw the spectrum map and voice waveform.
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Size: 63488 |
Author: benny |
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Description: 信号频谱分析
1. 观测已知方波信号、正弦波信号的频谱
分析频率为4KHz、8KHz的占空比为50 的方波信号、正弦波信号的频谱。记录所得频谱图。
2. 观测实时模拟信号（语音）的频谱
用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图-Signal spectrum analysis 1. Observing a known square-wave signal, sine wave signal frequency spectrum analysis 4KHz, 8KHz for the 50 duty cycle square wave signal, sine wave signal frequency spectrum. The recorded frequency spectrum. 2. Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of voice, voice saved as. Wav format. Wav file of the sub-Fourier transform analysis to make. Speech is divided into syllables, it should be sub-analysis, and practical application of digital signal processing of the FFT points is limited, generally only reach 1000 points. Fourier inverse transform IFFT, to restore the signal from the frequency domain. Draw maps and voice waveform spectrum
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Size: 64512 |
Author: benny |
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Description: 信号频谱分析
1. 观测已知方波信号、正弦波信号的频谱
分析频率为4KHz、8KHz的占空比为50 的方波信号、正弦波信号的频谱。记录所得频谱图。
观测实时模拟信号（语音）的频谱
用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图-Signal spectrum analysis 1. Observing a known square-wave signal, sine wave signal frequency spectrum analysis 4KHz, 8KHz for the 50 duty cycle square wave signal, sine wave signal frequency spectrum. The recorded frequency spectrum. Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of voice, voice saved as. Wav format. Wav file of the sub-Fourier transform analysis to make. Speech is divided into syllables, it should be sub-analysis, and practical application of digital signal processing of the FFT points is limited, generally only reach 1000 points. Fourier inverse transform IFFT, to restore the signal from the frequency domain. Draw maps and voice waveform spectrum
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Size: 94208 |
Author: benny |
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Description: OFDM系统仿真，包含了发射、信道估计、接受等完整的OFDM系统仿真-his simulation script set allows for an OFDM transmission to be simulated. Imagetx.m generates the OFDM signal, saving it as a windows WAV file. This allows the OFDM signal to be played out a sound card and recorded back. Imagerx.m decodes the WAV to extract the data. settings.m contains all the common settings to specify all the simulation parameters such as FFT size, number of carriers, input data source file, input and output WAV files, etc. See settings.m for more details.
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Size: 160768 |
Author: liangjun |
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Description: 对wav file 进行 waterfall fft处理-wav file waterfall FFT
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Size: 3185664 |
Author: AmyJiang |
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Description: 这是用matlab编的代码，实现的功能是可以方便的给定一段信号，画出它的频域的频谱图，对写论文有帮助-This is compiled with the matlab code, function is convenient for a given period of the signal, draw its frequency spectrum chart, to help write the paper
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Size: 1024 |
Author: 沈勇 |
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Description: 对语音进行简单处理 FFT变换 消噪等 含完整matlab文件和wav语音文件 -Simple voice processing such as FFT transform denoising matlab file containing a complete and wav sound files
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Size: 578560 |
Author: 金智明 |
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Description: describe fft from wav file using matlab
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Size: 21504 |
Author: baz |
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Description: 一个带用户界面的matlab语音合成和识别的程序，MainGuide01.fig通过提取MFCC，用dtw来计算实时录音和模板之间的最小距离，给出识别结果，并且给出波形图，频谱图，语谱图。MainGuide02.fig是语音合成程序，通过load一个wav文件用LPC，残差和pitch两种方式进行合成，并且能实时听合成语音的效果。-This is an simple user interface program including speech recoginition and speech synthesis.MainGuide01.fig extracting MFCC and using DTW to calculate the minimum distance between the real-time recording and templates , the recognition results are achieved, and the waveform diagram, FFT result , spectrum diagram are shown. MainGuide02.fig is a speech synthesis program, it load a wav file using LPC, synthesis by the residuals or by pitch two ways, you can listen to synthesized speech effect in the real time .
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Size: 365568 |
Author: 袁斌 |
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Description: 采用MATLAB编写fft算法，读取wav文件，显示语音信号波形频谱，并且与matlab自带的FFT算法比较，波形相同证明编写的算法正确。包括GUI设计的人机交互界面-FFT algorithm using MATLAB to read wav file, display the waveform of the speech signal spectrum, and the matlab algorithm with the FFT comparison, the same waveform to prove the correctness of the preparation of the algorithm.
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Size: 269312 |
Author: 巫小新 |
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Description: Analysis about FFT transform in matlab for audio or wav file
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Size: 234496 |
Author: Syauqina |
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Description: 用于检测音频wav文件的语谱以及FFT,使用了audioread函数(The language spectrum and FFT for detecting audio WAV files)
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Size: 1024 |
Author: 天黑前的盛夏
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