AI to Detect Speaker in a Speech

栏目: IT技术 · 发布时间: 4年前

内容简介:With the advancement inThrough this blog post, I intend to cover an AI application where one can detect the speaker from their voice. I will also explain the process by which I created this dataset. The code and dataset are made availableI created a Datase

Using AI to detect the speaker in a speech from the voice data

AI to Detect Speaker in a Speech

Picture by icons8 on Unsplash

With the advancement in AI , one can come up with many interesting and helpful AI applications. These AI applications can be helpful in Health, Retail, Finance, and various other domains. The main idea is to keep thinking about how can we utilize these advanced technologies and come up with interesting use cases.

Through this blog post, I intend to cover an AI application where one can detect the speaker from their voice. I will also explain the process by which I created this dataset. The code and dataset are made available here . There are a few blog posts around this topic but this one is different in two ways, First, it will provide a clear guide on how to detect the speaker effectively using some best practices without falling in pit-falls and secondly, at the end I will cover some really interesting use cases/applications that can be extended from this work. So, let’s get started.

Creating the Dataset

I created a Dataset consisting of 5 celebrities/popular figures from India.

AI to Detect Speaker in a Speech

Dataset created of 5 celebrities/popular figures from India. Image Source ~ Wikipedia

I took many speeches/interviews of these celebrities from Youtube and converted them into an Mp3 file .

Further, I converted these MP3 files into Spectograms using a popular Librosa Python library . I created these spectrograms repeatedly at an interval of 90seconds from the mp3 clip.

def generate_spectogram(file,path,jump = 90):
    total_time = librosa.get_duration(filename=file)
    till = math.ceil(total_time/jump)
    for i in range(till):
        x , sr = librosa.load(file,offset=i*jump,duration=jump)
        X = librosa.stft(x)
        Xdb = librosa.amplitude_to_db(abs(X))
        librosa.display.specshow(Xdb, sr=sr, x_axis='time', y_axis='log',cmap='gray_r')
        plt.savefig(file_save,dpi=1200)

These spectrograms look like:

AI to Detect Speaker in a Speech

Spectrogram from Voice

There’s a really good read on Librosa and Music Genre Classification.

Once we have converted the audio clips to Images, we can train a supervised Convolutional Neural network (CNN) , model.

Some Challenges

Developing such an application had some of its own challenges. These challenges are

  1. Our Dataset contains voices of pretty similar people. Detecting Gun-shot sound with the barking of the dog is not a very difficult task as these are different sounds. In our case, differentiating a person’s voice from another is a tougher problem.
  2. We have created a Dataset from Youtube speeches/interviews of these celebrities, so there are many times noise from the background or other person/interviewer speaking in between or the crowd applauding.
  3. The Dataset has at-most 6–7 clips per person which hampers the accuracy. A richer dataset would give better accuracy and confidence in detecting the person accurately.

Best Practices to Train such Models

While training this application, some things didn’t work well for me, and somethings worked like a charm boosting the model’s performance. In this section, I will call out the best practices to train such models without falling into the pitfall.

librosa.display.specshow(Xdb, sr=sr, x_axis=’time’, y_axis=’log’,cmap=’gray_r’)
plt.savefig(file_save,dpi=1200)

Model Training and Accuracy

I trained the model using FastAI Library. I used a ResNet architecture to train a CNN model. The dataset created and codes are made available here .

The model gave an accuracy of about 80–85% on the completely unseen test data (from different clips) when trained on a limited training set. The model performance can be improved by enriching the training dataset.

Other Interesting possible Usecases

Such a properly trained application can have its usage in

  1. Automatically tag speaker from a video/audio.
  2. Check how good one can mimic a celebrity, comparing the score coming out from the model for that celebrity.
  3. Creating an application to guess the Singer from a random song and compare how well AI can detect. Its liking playing versus AI.
  4. It can be useful in crime investigation to detect with high confidence the person/speaker from the tapped phone conversations.

Conclusion

Through this blog-post, I covered an AI application where one can detect the speaker from their voice. I also emphasized on the best practices of training such models and other interesting use cases possible out of it. The dataset created and codes are made available here .

If you have any doubts or queries, do reach out to me. I will also be interested to know if you have some interesting AI application/use case in mind to work on.

About the author-:

Abhishek Mungoli is a seasoned Data Scientist with experience in ML field and Computer Science background, spanning over various domains and problem-solving mindset. Excelled in various Machine learning and Optimization problems specific to Retail. Enthusiastic about implementing Machine Learning models at scale and knowledge sharing via blogs, talks, meetups, and papers, etc.

My motive always is to simplify the toughest of the things to its most simplified version. I love problem-solving, data science, product development, and scaling solutions. I love to explore new places and working out in my leisure time. Follow me on Medium , Linkedin or Instagram and check out my previous posts . I welcome feedback and constructive criticism. Some of my blogs -


以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,也希望大家多多支持 码农网

查看所有标签

猜你喜欢:

本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们

四步创业法

四步创业法

[美] Steven Gary Blank / 七印部落 / 华中科技大学出版社 / 2012-8-1 / 48.00

《四步创业法》获李开复推荐,是精益创业理论的奠基之作。作者Steven Gary Blank博士是硅谷资深企业家,他一共创办了八家企业,并担任多家硅谷公司的董事和创业顾问。本书总结作者25年创业经验,提出全新的客户发展方法 (诣在弥补传统产品开发方法的缺陷) ,掀起了硅谷近年精益创业 的浪潮。七印部落正在翻译作者的博客和授课视频,欢迎访问微博:http://weibo.com/7seals ......一起来看看 《四步创业法》 这本书的介绍吧!

随机密码生成器
随机密码生成器

多种字符组合密码

RGB HSV 转换
RGB HSV 转换

RGB HSV 互转工具

HEX CMYK 转换工具
HEX CMYK 转换工具

HEX CMYK 互转工具