音频处理之去噪算法---基于pcm和g711的音频16000hz、8bit去噪声算法
(1)应用背景
(2)主要降噪算法原理
(3)算法流程
(4)算法实现
(5)
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(1)应用背景
基于8148的音频alsa 采集,a8 编码成g711或dsp编码成aac,然后rtp外传播放vlc 播放,采样率是16000hz、8bit、欧美ulaw、单声道。由于电压或者其他的原因导致采集的pcm音频会出现有规律频率的啪啪声音,这里想用降噪算法去掉它。输入红色mic4 接手机耳机输出,输出rtp网络传出给电脑vlc播放
(2)主要降噪算法原理
主流算法有
1.傅立叶展开,转到频域,去掉不想要的频率。
2.开源库fftw http://www.fftw.org/
3.时域画图很容易,FFT就是三层循环,排序。基-2裂变算法看书
(3)算法流程
(4)算法实现
http://www.pudn.com/downloads111/sourcecode/windows/multimedia/detail460721.html
http://www.pudn.com/downloads109/sourcecode/speech/detail451366.html
http://www.pudn.com/downloads110/sourcecode/speech/detail455309.html
http://blog.sina.com.cn/s/blog_4e19960301000b46.html
http://download.csdn.net/detail/symble/1130571
http://www.fftw.org/fftw3.pdf
http://blog.csdn.net/xiahouzuoxin/article/details/7875406#comments 读取wav 文件
http://blog.csdn.net/xiahouzuoxin/article/details/9790455 fft算法原理
http://www.toptal.com/algorithms/shazam-it-music-processing-fingerprinting-and-recognition music processing
http://wenku.baidu.com/link?url=d5yYjSh-mHlxROMwy7_8P1cWz-4e46NzFznRVHKLoEyCEkMyrJI56xPpl_2um1NiSgUY7AxoBcn3zv47ej1DCPsT7a6NHK2ZBC7RIP6x_Gm
http://download.csdn.net/detail/future_fighter/432206
http://download.csdn.net/detail/symble/1130571
http://download.csdn.net/detail/u012324659/6473211
http://download.csdn.net/download/tqhailzh/4341986
(5)
http://www.csto.com/p/12482 csdn需求1w
http://bbs.csdn.net/topics/360054544?page=1