Description: 用同态滤波方法（倒谱）解决回声干扰问题。给出了一句语音，并在此信号上叠加回声干扰，通过倒谱的方法将信号和回声的冲击响应分开。-using the same state filtering method (cepstrum) Echo solve the interference problem. Given a voice, and in this echo superimposed on the signal interference, through cepstrum approach would echo signals and respond to the impact of separation. Platform: |
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Author:黄晓砥 |
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Description: 录制一段个人自己的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用窗函数法和双线性变换设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，并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；最后，设计一个信号处理系统界面。-Record a person s own voice signal, and recording the signal sampling draw sample after the speech signal time-domain waveform and frequency spectrum given filter performance indicators, using a window function method and the bilinear transform filter design and draw the frequency response filter then use the filter of their own design for the signal acquisition filtering, after filtering the signal to draw the time-domain waveform and spectrum, and filtering of signals before and after contrast, analysis of signal changes playback of voice signal Finally, the design of a signal processing system interface. Platform: |
Size: 2048 |
Author:yim |
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Description: 录制一段自己的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用窗函数法和双线性变换设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，并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；最后，设计一个信号处理系统界面。-Section of their own voice recording signal, and recording the signal sampling draw sample after the speech signal time-domain waveform and frequency spectrum given filter performance indicators, using a window function method and bilinear transformation design of filters, and draw the frequency response filter then use the filter of their own design for the signal acquisition filtering, after filtering the signal to draw the time-domain waveform and spectrum, and filtering of signals before and after contrast, analysis of signal changes playback voice signal Finally, the design of a signal processing system interface. Platform: |
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Author:joe |
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Description: 语音信号处理，语音识别，大致知道要经过预处理，特征提取，矢量化和匹配计算等几个步骤，
用matlab对一个语音信号进行滤波，分桢，加窗或者端点检测．
注：网上下voicebox工具箱，用做语音处理
-Voice signal processing, speech recognition, more or less know to go through pre-processing, feature extraction, vectorization and matching calculation several steps, using matlab on a voice signal filtering, sub-ching, windowed or endpoint detection. Note: The online toolbox VoiceBox used to do voice processing Platform: |
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Author:张小天 |
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Description: 1.录制一段自己的语音信号，并对录制的信号进行采样；
2.画出采样后的语音信号的时域波形和频谱图；
3.给定滤波器的性能指标，采用窗函数法和双线性变换法设计滤波器，
并划出滤波器的频域响应；
4.用该滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，
并对滤波前后的信号进行对比，分析信号的变化；
5.回放语音信号；
6.设计一个信号处理系统界面-1. Recorded their own voice for some signal, and recording the signal sampling 2. Draw samples of the voice signal after the time-domain waveform and frequency spectrum 3. Given filter performance indicators, using a window function method and dual- Design of linear transformation filters, and draw the filter frequency response 4. to use the filters on the collected signal filtering, after filtering the signal to draw the time-domain waveform and spectrum, and filtering of signals before and after contrast, analysis of signal changes 5. playback voice signal 6. to design a signal processing system interface Platform: |
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Author:阿里 |
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Description: 本文分析了语音数字信号的采集来源以及其预处理。通过实例，利用Matlab对语音信号进行时频变换与分析，同时构造一个固定频率的干扰信号，对两个信号进行合成，设计数字滤波器，实现对语音信号的F IR、IIR滤波处理，最后在时域和频域中对信号进行分析比较。-This paper analyzes the sources of voice digital signal acquisition and its pretreatment. By example, voice signals using Matlab time-frequency transform and analysis, and construct a fixed-frequency interference signals, the two signal synthesis, design digital filters to realize the speech signal F IR, IIR filtering, and finally time domain and frequency domain signal analysis and comparison. Platform: |
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Author:孙洋 |
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Description: 语音增强是影响语音识别系统性能的重要成分。为了比较语音增强算法的性能，采用Matlab软件进行了数值仿真，对不同噪声环境下的语音用3种不同的方法进行降噪，采用信噪比、端点检测等方法来降噪效果，并对几种增强算法的性能进行了比较分析。结果表明，在变噪声环境下短时谱MMSE法最佳，谱减法和维纳滤波法各有优点。-Speech enhancement of voice recognition is an important component of system performance. In order to compare the performance of speech enhancement algorithm using the Matlab software, a numerical simulation, speech under different noise environments with 3 different methods of noise reduction, the use of signal to noise ratio, endpoint detection method to the noise reduction effect, and a few kinds of enhanced performance of the algorithm were compared. The results show that changing the noise environment in the MMSE method was the best short-term spectrum, spectral subtraction and Wiener filtering methods have their advantages. Platform: |
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Author:static |
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Description: 基于MATLAB的语音信号分析及滤波(DSP课程设计说明书) 设计题目、内容及要求 课程设计的题目：基于MATLAB的语音信号分析及滤波。 课程设计的内容：录制一段个人自己的语音信号,并对录制的信号进行采样 画出采样后语音信号的时域波形和频谱图 给定滤波器的性能指标,采用窗函数法和双线性变换设计滤波器,并画出滤波器的频率响应 然后用自己设计的滤波器对采集的信号进行滤波,画出滤波后信号的时域波形和频谱,并对滤波前-Design based on MATLAB voice signal analysis and filtering (DSP curriculum design manual) subject, content and requirements for curriculum design Title: MATLAB-based analysis and filtering of the voice signal. Curriculum design: recording period of the individual' s own voice signal, and the recorded signal is sampled draw the sampled speech signal time-domain waveform and frequency spectrum to set the filter performance, using a window function method and double transform the design of filters, and draw the frequency response of the filter signal acquisition, filtering, and then use the filter of their own design to draw the waveform and spectrum of the filtered signals in time domain and filtering Platform: |
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Author:Rokey_Niu |
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Description: 1）选择一个语音信号作为分析对象，或录制一段语音信号； 2）对语音信号进行采样，画出采样前后语音信号的时域波形和频谱图； 3）利用MATLAB中的随机函数产生噪声加入到语音信号中，使语音信号被污染，然后进行频谱分析； 4）设计用于处理该语音信号的数字滤波器，给出滤波器的性能指标，画出滤波器的频率响应； 5）对被噪声污染的语音信号进行滤波，画出滤波前后信号的时域波形和频谱，并对滤波前后的信号进行比较和分析； 6）回放各步骤的语音信号，给出相应处理程序及运行结果分析。-1) Select a voice signal as an analysis object, or record a voice signal 2) sampling the voice signal, draw the waveform and frequency spectrum of the time domain before and after sampling the speech signal 3) using the random function in MATLAB generated noise was added to the speech signal, the speech signal to be contaminated, and then spectrum analysis 4) for processing the speech signal, the digital filter design, given the performance of the filter to draw the filter' s frequency response 5) on the noise pollution of the speech signal is filtered, time-domain waveform and spectrum draw before and after filtering the signal before and after filtering, and the signal for comparison and analysis 6) playback of the speech signal for each step, given the results of the corresponding processing procedures and run analysis. Platform: |
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Author:张三 |
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Description: 本课程设计的主要目的是在MATLAB环境下，使用窗口设计法设计一个滤波器，并对语音信号进行滤波去噪。开发平台为MATLAB7.0，设计方法为窗口设计法。用麦克风采集一段语音信号，绘制波形并观察其频谱，给定相应技术指标，用凯塞窗设计一个满足指标的FIR滤波器，对该语音信号进行滤波去噪处理，比较滤波前后的波形和频谱并进行分析。在滤波前后语音信号波形的变化中，由于我们录制的语音信号噪声不大，所以观察并不明显，但在频域波形中，我们可以明显的看到设计的滤波器对语音信号进行了滤波处理，将噪声进行了滤除。此次滤波基本达到了要求，完成了设计指标。-The main purpose of this course is designed in the MATLAB environment, the use of window design method to design a filter, and the voice signal filtering noise. Development platform for MATLAB7.0, design methods for the window design method. Collecting a voice signal with a microphone, and observe its spectrum waveform drawing, given the corresponding technical indicators, using a Kaiser window design FIR filter meet the target, the filter denoising speech signal processing, a waveform and spectrum before and after filtering and analyzed. Before and after the filter in the speech signal waveform changes, because we recorded voice signal to noise is low, they observed not obvious, but the waveform in the frequency domain, we can clearly see the design of a filter for the filtering of the speech signal processing , the noise were filtered out. The filtering basically reached the requirements to complete the design specifications. Platform: |
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Author:吴丹 |
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Description: 1. 给一段原始的语音信号（可以是自己录制的一段语音），加上一频率为3.8kHz的高频余弦噪声和频率为3.6kHz的高频正弦噪声（幅度自己可以选择），用窗函数设计一滤波器（要求最小阻带衰减为50dB）对加噪后的语音信号进行滤波，画出滤波器的频率响应曲线，画出滤波前后的时域图和频谱图。
需要用到的函数：
fir1 用窗函数设计FIR滤波器的函数
2. 用GUI设计一界面（如图1所示）完成如下功能：
1） 输入一语音信号，画出语音信号的时域图和频谱图；
2） 对语音信号加噪处理，画出加噪后的时域图和频谱图；
3） 给定滤波器的性能指标，采用几种不同的方法设计滤波器对加噪信后进行滤波，画出各滤波器的频率响应曲线，画出滤波后的时域图和频谱图。
-1. to some of the original speech signal (which can be a voice you record yourself), plus a cosine frequency of 3.8kHz frequency noise and frequency of 3.6kHz frequency sinusoidal noise (in the range that they can choose), with a window function to design a filter (requires a minimum stop band attenuation is 50dB) after adding noise to the speech signal is filtered, the filter frequency response curve to draw, draw diagrams and time-domain spectrum before and after filtering. Need to use the function: function fir1 with window function design FIR filter design 2. Using a GUI interface (Figure 1) complete the following functions: 1) an input speech signal, the speech signal in the time domain to draw graphs and spectrum 2) adding noise to the speech signal processing, draw diagrams and time-domain plus noise spectrum after 3) to set the filter performance, using several different methods designed to filter letter after adding noise filtering, draw the frequency response curve of each Platform: |
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Author:longteng |
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Description: 利用Matlab实现语音信号的数字水印技术.利用语音获取设备获取需要传送的保密语音信号；选择用于传输保密语音信号的普通声音载体；对加入水印信息的文件进行各种滤波处理，然后再对其进行水印提取，观察其结果；-Digital watermarking technology using Matlab voice signals using voice capture device to obtain confidential voice signals to be transferred Select common vector for the transmission of confidential voice speech signal adding watermark information on a variety of filtering files, and then its watermark extraction, observe the results Platform: |
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Author:刘歆 |
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Description: 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；
-Under the MATLAB software platform, using the function wavread voice signal is sampled, the sampling frequency and sampling points to remember
2) Draw the speech signal in the time domain waveforms were sampled voice fft transform, to obtain the spectral characteristics of the signal voice signals were added to the sinusoidal noise and white noise, plus noise signal when drawn-domain waveform and frequency spectrum
3) According to the speech signal plus noise spectral analysis to determine the filter noise filter specifications, design an appropriate digital filter and draw the filter frequency response
4) Use a filter designed to increase the signal-to-noise filtering, draw before and after filtering the signal in the time domain with a window display and the spectrogram of the signal before and after filtering comparative analyzes signal change Platform: |
Size: 1024 |
Author:张三 |
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Search - filtering a voice signal using matlab