Book Image

Rapid BeagleBoard Prototyping with MATLAB and Simulink

Book Image

Rapid BeagleBoard Prototyping with MATLAB and Simulink

Overview of this book

As an open source embedded single-board computer with many standard interfaces, Beagleboard is ideal for building embedded audio/video systems to realize your practical ideas. The challenge is how to design and implement a good digital processing algorithm on Beagleboard quickly and easily without intensive low-level coding. Rapid BeagleBoard Prototyping with MATLAB and Simulink is a practical, hands-on guide providing you with a number of clear, step-by-step exercises which will help you take advantage of the power of Beagleboard and give you a good grounding in rapid prototyping techniques for your audio/video applications. Rapid BeagleBoard Prototyping with MATLAB and Simulink looks at rapid prototyping and how to apply these techniques to your audio/video applications with Beagleboard quickly and painlessly without intensive manual low-level coding. It will take you through a number of clear, practical recipes that will help you to take advantage of both the Beagleboard hardware platform and Matlab/Simulink signal processing. We will also take a look at building S-function blocks that work as hardware drivers and interfaces for Matlab/Simulink. This gives you more freedom to explore the full range of advantages provided by Beagleboard. By the end of this book, you will have a clear idea about Beagleboard and Matlab/Simulink rapid prototyping as well as how to develop voice recognition systems, motion detection systems with I/O access, and serial communication for your own applications such as a smart home.
Table of Contents (15 chapters)
Rapid BeagleBoard Prototyping with MATLAB and Simulink
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Configuration of the voice recognition system


In this chapter, for the purpose of demonstration, we use the output of the recognition system to control the LED on the BeagleBoard. If the BeagleBoard with voice recognition capability is connected with external actuators and peripheral devices, it can be used to turn on and turn off TV, voice authorization, and so on.

The following figure illustrates the configuration of the voice recognition example and some additional devices and packages required for this example:

  • Hardware: A microphone with a 3.5 mm jack

  • Software: The DSP system toolbox in MATLAB/Simulink

As shown in the previous figure, the microphone is connected to the BeagleBoard's audio-in port and the sound is converted into sampled digital audio data by the audio input device (an accelerated audio encoding and decoding (CODEC) chip TPS65950) on the BeagleBoard. The digital audio data is a stream of 16-bit integers sampling at a specified rate. The audio data is presented in the form...