How to synthesize speech between vue and express

With the continuous development of artificial intelligence technology, speech synthesis has gradually become a very popular research field. Recently, more and more developers have begun to pay attention to how to use Vue and Express to build speech synthesis functions in web applications. This article will introduce how to implement this function.

1. Vue Framework

Vue is a very popular front-end framework. It provides a lot of support for page rendering and user interaction, and also allows you to build applications at the component level. program. Vue applications allow you to create Single Page Applications (SPA), which means that the application only needs to be loaded once, after which all content can be changed dynamically without the need to reload the page. This approach is very beneficial for speech synthesis functions in web applications because it allows the text in the page to be updated very easily.

To use Vue to implement speech synthesis function, you need to have a certain understanding of Vue's components and life cycle functions. In addition, you also need to know some basic speech synthesis APIs, such as the Web Speech API. Here are some reference materials:

• Vue official documentation: https://cn.vuejs.org/
• Web Speech API documentation: https://developer.mozilla.org/ zh-CN/docs/Web/API/Web_Speech_API

2. Express Framework

Express is a very popular back-end framework that uses the Node.js platform and is very suitable for building RESTful APIs and web applications. Express provides encapsulation of HTTP requests and responses, allowing you to build web applications very quickly and easily. In speech synthesis applications, Express can be used to handle client requests and generate speech and return it to the client. This process can be achieved by using the Child Process module of Node.js together with ffmpeg and specifying the static resource folder using the express.static() function.

To use Express to implement the speech synthesis function, you need to have a certain understanding of Express's routing and HTTP request processing. In addition, you also need to know some basic speech synthesis modules, such as ffmpeg. Here are some reference materials:

• Express official documentation: http://www.expressjs.com.cn/
• ffmpeg documentation: https://www.ffmpeg.org/ documentation.html

3. Speech Synthesis API

Web Speech API is a set of browser APIs that allow web developers to use JavaScript to implement speech synthesis and speech recognition functions. This API provides a speech synthesizer interface (SpeechSynthesizer) that allows you to easily generate artificial speech.

The following code snippet shows how to use SpeechSynthesizer in the Vue component to implement speech synthesis:

let synth = window.speechSynthesis;
let utterThis = new SpeechSynthesisUtterance(text);
synth.speak(utterThis);

The above code creates a SpeechSynthesisUtterance object, which contains the text that needs to be synthesized. It then passes this object to the speak() method of the SpeechSynthesis object to begin the synthesis process.

4. Combining Vue and Express

To combine Vue and Express, you can simply use HTTP requests and Express routing in your Vue application. When a user triggers speech synthesis in a Vue application, the Vue component will send an HTTP request to the server.

The following is a simple sample code showing how to combine Vue and Express:

// example Vue component
export default {
  data() {
    return {
      text: '',
      audioSrc: ''
    }
  },
  methods: {
    synthesize() {
      axios.post('/synthesize', { text: this.text })
        .then(response => {
          this.audioSrc = response.data.audioSrc;
        })
        .catch(error => {
          console.log(error);
        });
    }
  },
  // ...
}

// example Express route
app.post('/synthesize', (req, res) => {
  let text = req.body.text;
  let command = `ffmpeg -i public/input.mp3 -filter:a "atempo=1.5" -acodec libmp3lame -q:a 4 public/output.mp3`;
  let child = exec(command, (error, stdout, stderr) => {
    if (error) {
      console.error('Speech synthesis error');
      res.status(500).send({ error: 'Speech synthesis error' });
    } else {
      console.log('Speech synthesis complete');
      res.send({ audioSrc: '/output.mp3' });
    }
  });
});

The above code snippet indicates that there is a method synthesize() in the Vue component, which will trigger the API HTTP POST request with path "/synthesize" and pass the text data as an object. In the Express route, this text will be converted into an audio file, and the file path will be sent back to the client as a JSON response.

Summary

This article introduces how Vue and Express can be used together to implement speech synthesis. Using Web Speech API and ffmpeg, we can easily create dynamic speech applications. Vue and Express ensure user experience and handling of multiple voice requests, while ensuring fast response and flexibility of the application. We hope this article helped you understand how to integrate speech synthesis into your web application using this practical technology.

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