What is MIME type "audio/vnd.qcelp"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

audio/vnd.qcelp refers to a specialized audio format. It uses the QCELP algorithm (Qualcomm Code Excited Linear Prediction) designed to compress speech efficiently.

This format is ideal for low-bandwidth voice recordings and mobile communications.

• Main use: Compressing communication-quality voice audio.
• Technical detail: Uses a speech compression technique that lowers file size while keeping voice understandable.
• Other applications: Can appear in files that might also use other containers like AIFF, AIF, QCP, and IEF.

This MIME type is common in systems that transmit voice data over cellular networks. For more on its encoding method, see Code-Excited Linear Prediction (CELP).

Associated file extensions

.aiff, .aif, .qcp, .ief

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:

    Content-Type: audio/vnd.qcelp
  

HTML

In HTML, you can specify the MIME type in various elements:

    <a href="file.dat" type="audio/vnd.qcelp">Download file</a>
  

Server-side (Node.js)

Setting the Content-Type header in Node.js:

    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'audio/vnd.qcelp');
      res.end('Content here');
    }).listen(3000);
  

Associated file extensions

.aiff, .aif, .qcp, .ief