Building a voice activity detector (VAD) — Alex Dialogue Systems Framework 0.1 documentation

Building a voice activity detector (VAD) — Alex Dialogue Systems Framework 0.1 documentation:



NN vad



https://pdfs.semanticscholar.org/14a6/c0a97c82c8d502ce53a60698ce630bafb294.pdf



'via Blog this'

Kaldi: Data types in the "nnet3" setup.

Kaldi: Data types in the "nnet3" setup.: "There is a correspondence b"



'via Blog this'

kaldi/nnet-compute-test.cc at master · kaldi-asr/kaldi

kaldi/nnet-compute-test.cc at master · kaldi-asr/kaldi:



'via Blog this'

bash - Linux command to get time in seconds, milliseconds, nanoseconds

bash - Linux command to get time in milliseconds - Stack Overflow:



To get seconds:

date +%s

To get nanoseconds:

date +%s.%N 

To get milliseconds:

echo $(($(date +%s%N)/1000000))



'via Blog this'

marloj/EAR-TUKE: System for acoustic event detection

code:

marloj/EAR-TUKE: System for acoustic event detection:





paper: 

https://www.researchgate.net/publication/287741073_EAR-TUKE_The_Acoustic_Event_Detection_System

https://www.researchgate.net/publication/282571516_Efficient_acoustic_detector_of_gunshots_and_glass_breaking





'via Blog this'

State of US science enterprise report shows US leads in S&E as China rapidly advances | NSF - National Science Foundation

State of US science enterprise report shows US leads in S&E as China rapidly advances | NSF - National Science Foundation:



'via Blog this'

c++ 生成文件MD5 - CSDN博客

c++ 生成文件MD5 - CSDN博客:



http://blog.csdn.net/u011304970/article/details/60573216



'via Blog this'

异常声音检测之kaldi DNN 训练 - CSDN博客

异常声音检测之kaldi DNN 训练 - CSDN博客:

异常声音检测总结

http://blog.csdn.net/YJJat1989/article/details/44961279

 异常声音检测，顾名思义，就是检测现实生活中的异常声音，如枪声、爆炸声、哭声、尖叫声等，属于公共安全监控的范畴。

        传统的公共安全监控是用摄像头，但是摄像头只能监控某个固定的场景，而且受光线影响很大，因而在电影中，罪犯只要知道摄像头的位置，就可以很容易地避开摄像头或用布将摄像头遮住。

        随着移动互联网的发展，各种可穿戴式的安全产品相继出现，但都是主打定位牌，360儿童手表倒是可以录音，但是需要家长主动拨打手表来录音，这种应用场景是在家长想知道孩子在哪时拨打孩子的手表使其录音10秒，这10秒录音能不能让家长知道孩子所处的环境暂且不说，单家长主动去拨打手表就有个何时拨打的问题，家长只在想起来的时候才拨打，也许孩子早已经处于危险之中。360儿童手表还可以让孩子在遇到危险的时候紧急呼救，这里所谓的危险必须是儿童意识清醒而且有呼救意识。所以这种家长主动拨或孩子主动求救的方法都是被动的。

         如果用异常声音来判断孩子是否安全呢？因为声音是全向传播的，不受光线影响，所以检测异常声音理论上是可以的。但是异常声音的种类是在太多太复杂了，姑且不说有哭声、尖叫声、枪声等不同异常声音，即使是枪声这一种异常声音也有手枪、步枪等；而且现实生活中的干扰实在太多，所以准确判断出异常声音还是很困难。

        目前这一领域有两种方案，一种叫异常声音检测，另一种叫异常声音分类。所谓异常声音检测，就是检测是否有异常声音，但不能确定是何种异常声音；而异常声音分类，就是将异常声音分类，从而知道检测到的是何种异常声音，很明显，这种方法能检测出的异常声音种类有限。

        异常声音检测的一般方法是对背景环境声建模，所有和模型不匹配的都是异常声音；而异常声音分类则是对异常声音建模，所有和模型匹配的就是某种异常声音。这两种方法的原理其实都来自语音识别，本质上是要训练出一个分类器。而语音识别的关键是分类器的区分度，也就是模型的准确性，而这又是由所选的声学特征和声音模型确定的。

        常用的声学特征就是MFCC，此外还有MPEG-7等。我们听到的声音包含太多无用的信息，MFCC就是用24维特征系数来代表一帧的声音。常用的声音模型当然是HMM，此外还有GMM等。所以运用这类方法的难点和语音识别的难点是相同的。

        而在实时检测中，准确检测出异常声音的起点和终点也是很重要的。因为如果起点和终点不准确，势必会影响模型准确性，从而影响识别率。

'via Blog this'

说话人识别中的VAD - CSDN博客

说话人识别中的VAD - CSDN博客:



'via Blog this'

kaldi/decodable-simple-looped.cc at master · kaldi-asr/kaldi

kaldi/decodable-simple-looped.cc at master · kaldi-asr/kaldi:



'via Blog this'

Speech representation and data exploration | Kaggle

Speech representation and data exploration | Kaggle:



'via Blog this'

TensorFlow Speech Recognition Challenge | Kaggle

TensorFlow Speech Recognition Challenge | Kaggle:



'via Blog this'

Visual to Sound: Generating Natural Sound for Videos in the Wild

Visual to Sound: Generating Natural Sound for Videos in the Wild:



'via Blog this'

The disk drive for /media/disk1 is not ready or not present

Setting up a large (2TB+) hard disk drive on Linux: "mount /dev/sdb1 /mnt/sdb1/"

[Question]



 "The disk drive for /media/disk1 is not ready or not present" and have to press "s" to continue booting. 



1) How to add Nth hard drive in linux system:

If you old disk missed, it may because you did not put your new drive in Nth slot.

That means you also need reorder your old disk to ensure:

disk1, disk2,disk3, in

slot1,slot2, slot3.

This solve my problem.



https://help.ubuntu.com/community/InstallingANewHardDrive



1)

How to install a 8TB hard disk drive on Linux?

Refer:

Setting up a large (2TB+) hard disk drive on Linux

http://magicmonster.com/kb/os/linux/large_hdd.html



'via Blog this'

Padding an audio file with silence using sox - ActiveArchives

Padding an audio file with silence using sox - ActiveArchives:

sox -n -r 16000 -c 1 silence.wav trim 0.0 3.0

'via Blog this'

VB Diarization with Eigenvoice and HMM Priors | Speech Processing Group

VB Diarization with Eigenvoice and HMM Priors | Speech Processing Group:



'via Blog this'

aiy projects with google

Voice:





https://aiyprojects.withgoogle.com

'via Blog this'

[official]iPhone Batteries replacement 苹果电池更换官方消息

A Message to Our Customers - Apple:

Official link on how to replace iphone patteries

https://getsupport.apple.com/?caller=psp&SG=SG003&category_id=SC0105&symptom_id=23306

December 28, 2017

A Message to Our Customers about iPhone Batteries and Performance

We’ve been hearing feedback from our customers about the way we handle performance for iPhones with older batteries and how we have communicated that process. We know that some of you feel Apple has let you down. We apologize. There’s been a lot of misunderstanding about this issue, so we would like to clarify and let you know about some changes we’re making.

First and foremost, we have never — and would never — do anything to intentionally shorten the life of any Apple product, or degrade the user experience to drive customer upgrades. Our goal has always been to create products that our customers love, and making iPhones last as long as possible is an important part of that.

How batteries age

All rechargeable batteries are consumable components that become less effective as they chemically age and their ability to hold a charge diminishes. Time and the number of times a battery has been charged are not the only factors in this chemical aging process.

Device use also affects the performance of a battery over its lifespan. For example, leaving or charging a battery in a hot environment can cause a battery to age faster. These are characteristics of battery chemistry, common to lithium-ion batteries across the industry.

A chemically aged battery also becomes less capable of delivering peak energy loads, especially in a low state of charge, which may result in a device unexpectedly shutting itself down in some situations.

To help customers learn more about iPhone’s rechargeable battery and the factors affecting its performance, we’ve posted a new support article, iPhone Battery and Performance.

It should go without saying that we think sudden, unexpected shutdowns are unacceptable. We don’t want any of our users to lose a call, miss taking a picture or have any other part of their iPhone experience interrupted if we can avoid it.

Preventing unexpected shutdowns

About a year ago in iOS 10.2.1, we delivered a software update that improves power management during peak workloads to avoid unexpected shutdowns on iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, and iPhone SE. With the update, iOS dynamically manages the maximum performance of some system components when needed to prevent a shutdown. While these changes may go unnoticed, in some cases users may experience longer launch times for apps and other reductions in performance.

Customer response to iOS 10.2.1 was positive, as it successfully reduced the occurrence of unexpected shutdowns. We recently extended the same support for iPhone 7 and iPhone 7 Plus in iOS 11.2.

Of course, when a chemically aged battery is replaced with a new one, iPhone performance returns to normal when operated in standard conditions.

Recent user feedback

Over the course of this fall, we began to receive feedback from some users who were seeing slower performance in certain situations. Based on our experience, we initially thought this was due to a combination of two factors: a normal, temporary performance impact when upgrading the operating system as iPhone installs new software and updates apps, and minor bugs in the initial release which have since been fixed.

We now believe that another contributor to these user experiences is the continued chemical aging of the batteries in older iPhone 6 and iPhone 6s devices, many of which are still running on their original batteries.

Addressing customer concerns

We’ve always wanted our customers to be able to use their iPhones as long as possible. We’re proud that Apple products are known for their durability, and for holding their value longer than our competitors’ devices.

To address our customers’ concerns, to recognize their loyalty and to regain the trust of anyone who may have doubted Apple’s intentions, we’ve decided to take the following steps:

• Apple is reducing the price of an out-of-warranty iPhone battery replacement by $50 — from $79 to $29 — for anyone with an iPhone 6 or later whose battery needs to be replaced, available worldwide through December 2018. Details will be provided soon on apple.com.
• Early in 2018, we will issue an iOS software update with new features that give users more visibility into the health of their iPhone’s battery, so they can see for themselves if its condition is affecting performance.
• As always, our team is working on ways to make the user experience even better, including improving how we manage performance and avoid unexpected shutdowns as batteries age.

At Apple, our customers’ trust means everything to us. We will never stop working to earn and maintain it. We are able to do the work we love only because of your faith and support — and we will never forget that or take it for granted.

'via Blog this'

业界 | Facebook 开源语音识别工具包wav2letter（附实现教程） -百家号

业界 | Facebook 开源语音识别工具包wav2letter（附实现教程） -百家号: "业界 | Facebook 开源语音识别工具包wav2letter（附实现教程）"

业界 | Facebook 开源语音识别工具包wav2letter（附实现教程）

'via Blog this'

mozilla/DeepSpeech: A TensorFlow implementation of Baidu's DeepSpeech architecture

mozilla/DeepSpeech: A TensorFlow implementation of Baidu's DeepSpeech architecture:



'via Blog this'