1. Hands-free Eyes-free Text Messaging
Derek Woodman, Jeffrey Gehring, Abdullah Alshalan
Mobile Computing Fall 2010

2. Introduction
Our goal was to make an android application that makes it save to drive while texting
Common place to have a hand-free system for placing phone calls
We are delivering a system that does this for texting
The system is hands-free and eyes-free so the driver still focus on driving
11/24/2010

3. How? We used several APIs available in the android operating system
TTS – text to speech
STT – speech to text
Messaging API
Used Android because it is free and had access to lab phones
Used APIs because well documented and didn’t have to write our own
Android provides the tools
We put them together and performed testing.
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4. Design
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5. Application Demo In class demo of SafeText Prepare to be amazed!
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6. Testing
Most papers we have seen are concerned with how fast or accurate the speech system works
We focused on how well it improves the user’s attention – the main goal!
Our testing focused on the user’s reaction time.
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7. Stop Light Simulator Shown picture of a stoplight
The light will change periodically
User asked to react to the light changing
Each user was tested under the following conditions
No texting
Regular texting
Voice texting
Measure the reaction time
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8. Stop Light Simulator http://www.youtube.com/watch?v=_d3em1pdB cU
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9. Results
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10. Discussion
Our test shows that our application improves the reaction time of users while texting
Reaction time reduced by more than half
Android’s speech recognition was better than expected.
Issues with Android – learning curve
Several threads running at once
Have to use function call backs to make sure processing has finished
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11. Questions?
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