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fenxing
- 为提高语音端点检测(VAD)在较低信噪比(10 dB)下的准确率,提出一种基于短时分形维数的改进算法。结合语音信号的特点,对2种常用的语音信号分形维数计算方法进行了比较和选择,同时采用动态跟随门限值实现语音端点的自适应检测。试验结果表明:对于信噪比6~10 dB的带噪语音,此方法可以实现整段语音的检测,而且具有一定的噪声鲁棒性,系统运行期间能够自适应调整门限值以适应环境噪声的变化,提高了VAD算法的准确率。这个是源码matlab。-In order to improve voice activi
voice
- 本程序为一个用matlab实现的语音滤波程序,能计算并显示语音信号的幅频特性,巴特沃斯低通滤波器幅度和相位响应,引入噪声后的幅频特性,以及滤波后的DFT幅频特性。本程序附有语音文件以供试验。-This program is an implementation using matlab voice filtering procedures, can calculate and display the speech signal amplitude-frequency characteristics
a_modified_method
- 介绍了改进谱减法的原理及算法。提出在信噪比(sNR)较低的情况下,根据语音短时能量和过零率,判断在无声 或有声期间是否偶然的噪声过高,从而设定合适的参数降低噪声。-Introduced an improved spectral subtraction principles and algorithms. Proposed signal to noise ratio (sNR) lower case, according to voice short-term energy and zero-cr
chengxu
- 给音乐添加噪声再通过低通滤波器滤掉噪声,性能改善过后能明显看到效果。-Add noise to the music and through a low pass filter filters noise, performance improvement can be evident after the effects.
The-FIR-filter-design
- (附带有文档,文档中有方案,有程序有结果,设计完后对一段语音进行处理)给定滤波器的规一化性能指标(参考指标,实际中依据每个同学所叠加噪声情况而定)通带截止频率wp=0.25*pi。 采用窗函数法设计低通、高通、带通型FIR滤波器,对叠加噪声前后的语音信号进行滤波处理,绘出滤波器的频域响应,绘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;在相同的性能指标下比较各方法的滤波效果,并从理论上进行分析-(With the document, document, program
bditong
- 用matlab实现巴特沃斯低通滤波器的M文件。本例读取电脑自带的XP开机声音,加上高频噪声,然后滤波看效果。-Butterworth low-pass filter using matlab M-file. This case, read the computer comes with XP start-up sound, coupled with high-frequency noise, and then filter to see the effect.
IIR_ditong
- 简单的语音信号去噪声,通过在录制的声音中添加噪声,然后通过低通滤波器去除噪声-IIR low pass filter
low-complexity-noise-estimation
- 一种低复杂度的噪声谱跟踪算法,用于语音增强和语音识别中,文件夹内有参考文献。-A low noise spectral tracking algorithm complexity, for speech enhancement and speech recognition, there are references folder.
ISM
- 产生房间脉冲响应的源代码,在多噪声,多混响的情况下,信噪比很低,信干比也很低,同时伴随着噪声是非平稳的情况。-room impluse response
FIRfiler
- 对于采集的加噪声的语音信号进行FIR数字滤波,包括低通,带通,高通-For the acquisition of noisy speech signal FIR digital filtering, including low-pass, band-pass, high pass
IIRfiler
- 对于采集的加噪声的语音信号进行IIR数字滤波,包括低通,带通,高通-For the acquisition of noisy speech signal IIR digital filtering, including low-pass, band-pass, high pass
FIR-filter
- 实现用FIR低通滤线性相位滤波器滤除声音中的噪声-The FIR low-pass filtered linear phase filter is used to filter the noise in the sound
chenxu
- (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