Freescale Semiconductor

G.729AB Vocoder Loopback Example Application for 5685x

Overview

The loopback demo allows comparison of the quality of vocoders using Freescale PCM, G.729AB, G.726

(different compression modes: 16 and 40 kbits), and G.711 vocoders.

In the Loopback Demo, the voice is captured using a microphone, digitized by the codec, then encoded and

decoded using the specified vocoder. It’s then sent back to the codec, which converts the reconstructed voice

samples and plays them back on speakers.

How to get this software

This example application is included as part of the CodeWarrior Development Studio for 56800/E Digital

Signal Controllers. Follow these steps:

1.

Install CodeWarrior Development Studio for 56800/E Digital Signal Controllers

2.

Launch CodeWarrior, and create new Processor Expert project

a.

Select File > New menu

b.

Select Processor Expert Examples Stationery

c.

Type project name

d.

Click OK

e.

Select DemoApplications > Telephony > G729ab > 56858

f.

Click OK

3.

Generate application code by selecting Processor Expert > Generate Code menu

Detailed documentation

Documentation for this application is included as part of this example project. Expand Doc folder located

in the project window by clicking on the + icon next to the folder, and open desired file by double clicking it.

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