band-pass filtering】的更多相关文章

note: Some articles are very good in http://www.electronics-tutorials.ws/,I share them in the Cnblog so that Chinese hardware engineers can enjoy and learn. ComeFrom:http://www.electronics-tutorials.ws/filter/filter_4.html   The cut-off frequency or…
[TI博客大赛][原创]LM3S811之基于PWM的DAC http://bbs.ednchina.com/BLOG_ARTICLE_3005301.HTM http://www.fpga4fun.com/PWM_DAC_3.html One-bit DAC Take one pin of an FPGA, connect a speaker and listen to an MP3? Easy. Here, we'll use a PC to decode an MP3, and then s…
RFID读写器的工作原理 RFID的数据采集以读写器为主导,RFID读写器是一种通过无线通信,实现对标签识别和内存数据的读出和写入操作的装置. 读写器又称为阅读器或读头(Reader).查询器(Interrogator).读出装置(Reading Device). 扫描器(Scanner).通信器(Communicator).编程/编码器(Programmer)等等. 读写器工作原理 RFID读写器的基本原理是利用射频信号与空间耦合传输特性,使电子标签与阅读器的耦合元件在射频耦合通道内进行能量传…
This 125 kHz RFID reader http://www.serasidis.gr/circuits/RFID_reader/125kHz_RFID_reader.htm http://www.serasidis.gr/circuits/RFID_reader/images/125kHz_RFID_reader_schem.GIF I will try to explain with simple words how the RFID works. The ATtiny13 use…
摘要: 在上一篇的文档中,分析unimrcp中vad算法的诸多弊端,但是有没有一种更好的算法来取代呢.目前有两种方式 1. GMM   2. DNN. 其中鼎鼎大名的WebRTC VAD就是采用了GMM 算法来完成voice active dector.今天笔者重点介绍WebRTC VAD算法.在后面的文章中, 我们在刨析DNN在VAD的中应用.下面的章节中,将介绍WebRTC的检测原理. 原理: 首先呢,我们要了解一下人声和乐器的频谱范围,下图是音频的频谱. 本图来源于网络 根据音频的频谱划分…
HTK计算mfcc/filter_bank源码解析 HTK可以用简单的 HCopy -C config -s scp 求取mfcc或者filter_bank 关于mfcc的原理在 http://my.oschina.net/jamesju/blog/193343 中有讲解,这里主要说HTK具体是如何用C实现的,因为HTK自身的庞大,文件嵌套不少,所以我提取出了求取filter_bank的源码并重写了,可以直接运行. 读入数据.分帧 首先定义三个结构体: typedef struct Wave {…
how to generate an analog output from a in-built pwm of Atmega 32AVR microcontrloller? you need a resistor, a capacitor and an opamp. opamp is not really necessary when you are driving a mosfet, but will make life a bit easier. just be aware, that th…
https://www.biostars.org/p/198405/ Quick question is: I have some mapped reads in bam file which have good read quality, but they have sam flag 0x200 which means they didn't pass the vendor check. Should I include them or not in downstream analysis?…
openvpn Section: Maintenance Commands (8)Index NAME openvpn - secure IP tunnel daemon. SYNOPSIS openvpn [ options ... ]  INTRODUCTION OpenVPN is an open source VPN daemon by James Yonan. Because OpenVPN tries to be a universal VPN tool offering a gre…
2017年4月16日 一周AnswerOpenCV佳作赏析 1.HelloHow to smooth edge of text in binary image, based on threshold.Something like anti-aliasing by openCv?example 题目:图片去毛刺 优质解答: #;    }    )        radius;    Mat mInput,mOutput;    Mat mChannel[];    split(mInput_Bg…