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Description: 内有两个MATLAB程序，主要用于语音增强：一个用于向纯净语音文件(wav)添加高斯白噪声，信噪比可选；另一个文件用于测量语音信噪比，对语音增强效果判断-MATLAB, there are two procedures, mainly used for speech enhancement: one for the pure audio files (wav) add white Gaussian noise, SNR optional another document used to measure the voice signal to noise ratio, the effect of speech enhancement judge
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Size: 1024 |
Author: 武月 |
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Description: 对具有周期性的音频进行加噪声后自相关然后输出为wav音频，使用tc编写-A periodic audio add noise then related it and then output as wav audio
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Size: 5120 |
Author: yezijihe |
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Description: 使用低通滤波器从含有噪声的信号中提取有用的正弦波
(见实验指导书 实验九 数字滤波器中的第一题)
目的：用数字滤波器从含有高频噪声的采样数据中提取正弦信号。
要求：①输入信号为一正弦波，并加入一个白噪声的干扰来模拟信号传输中的随机干扰信号（用以模拟含有噪声采样序列）。
（模拟含有噪声采样序列具体可用正弦波信号叠加高频噪声来实现，为了使滤波效果明显，本实验的高频噪声是用高频均匀分布白噪声（Uniform）通过Butterworth高通滤波器过滤生成的，高通滤波器的截止频率设为10倍输入信号频率。）
②在程序中设计一个低通巴特沃斯滤波器，以滤除信号中的噪声分量，提取输入的正弦波信号 。
③可调节信号滤波器的截止频率和阶数，可显示滤波前与滤波后的时域信号。
④给出滤波前与滤波后的频谱特性的显示。
-Using low pass filter extracting useful sine wave signal containing noise(see experiment instruction digital filter in the first nine questions)Objective: to use digital filter sampling data extract containing high frequency noise sine signal.Requirements: (1) the input signal is a sine wave, and add a white noise interference to simulate the random disturbance signal of the signal transmission (to simulate contains noise sampling sequence).(simulated the sampling sequence contains noise available sine wave signal superposition of high frequency noise, in order to make the filtering effect is obvious, the experiment of high frequency noise is Uniform distribution with high frequency white noise (Uniform) by Butterworth high-pass filter to filter generated, high-pass filter cutoff frequency set to 10 times the size of the input signal frequency.)(2) in the program design a low-pass butterworth filter, in order to filter out the noise in the signal component, extract the input sine wav
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Size: 275456 |
Author: xy |
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Description: 1. Extract files and run Audio_denoise_main.m file folder...
2. Click on Load & play Audio file and Original sound.wav file
3. Then using slider AWGN (White gauusion noise)...it is vary 1 to 10 set it to 10..
4. now click on Add Noise and play...
5. u can save noisy signal by save noisy signal tab...
6. now wavelet...
7. thresholding..
8. now click on Denoise and play....wait for some time...this will take 25 sec time
9. now save that denoised signal...and record all output parameters...
10. now click on clear all and exit-1. Extract files and run Audio_denoise_main.m file folder...
2. Click on Load & play Audio file and Original sound.wav file
3. Then using slider AWGN (White gauusion noise)...it is vary 1 to 10 set it to 10..
4. now click on Add Noise and play...
5. u can save noisy signal by save noisy signal tab...
6. now wavelet...
7. thresholding..
8. now click on Denoise and play....wait for some time...this will take 25 sec time
9. now save that denoised signal...and record all output parameters...
10. now click on clear all and exit
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Size: 1990656 |
Author: arjun |
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Description: 设计一个简单的GUI界面，对导入的音频文件进行时域特性分析。计算其时域波形、平均幅度、短时能量、短时过零率。对该音频文件进行加噪处理，分析其时域波形变化。设定一个固定时长，对该音频添加回声并保存为“*.wav”格式文件。
对音频文件的时域分析是对音频文件进行传输、降噪及其他再编辑的基础。其中短时能量可用作清浊音区分的标准和语音起始点的判断。短时过零率可用作判断有声段与无声段和从背景噪声中提取语音信号。
-Design a simple GUI interface that time domain characteristics analysis on import audio files.Calculate the average time domain waveform, amplitude, short-time energy and short-time zero crossing ratio.Add to deal with the noise of the audio files, analyze the changes in the time domain waveform.To set a fixed time, to add the audio echo and saved as a *. Wav format file.
The time domain analysis of the audio file was transmitted to audio files, noise reduction and other editor again.The short-time energy voiced distinguish between standard and can be used as a clear voice starting point judgement.Short-time zero crossing ratio can be used as a judgment audio segment and silent segment and extract speech signal background noise.
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Size: 52224 |
Author: liwan |
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Description: its a matlab code to add noise to clean wav file.
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Size: 3072 |
Author: sam |
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Description: 可以实现对自己录制的wav格式声音进行频谱分析时域分析并且加入随机噪音，可播放声音进行对比，自动绘制波形频谱图。最后进行去噪滤波。适合大学生数字信号处理课程实验(It can realize the spectral analysis of the wav format, record the time domain analysis and add random noise. It can play the voice contrast, and automatically draw the waveform spectrum. Finally, de-noising filtering is carried out. Experiment on the course of digital signal processing for College Students)
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Size: 17379328 |
Author: 晚风拂柳颜
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