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
About the Authors
About the Reviewers

Digital audio signals

In most applications, analog sound is first sampled and converted into an integer at some sampling rate. With respect to the BeagleBoard, the conversion of analog sound into a digital audio signal is done by the TPS65950 chip. The two most important characters in digital audio are sampling rate and resolution. The sampling rate specifies how fast the sound is sampled, and resolution is defined as how many bits are used for representing one sample. The sound can be completely specified by the sequence of these integer numbers and the sample rate. The following table lists these characters in some common audio systems:


Sample rate




8 kHz

8-12 bits


Mobile phone

8 kHz

14-16 bits


Portable music player

32 kHz

14-16 bits


CD audio

44.1 kHz

16 bits

Stored on CD