1. Dan Nealey Scott Batura
WristMan: An Unobtrusive Wrist-Watch Interface for Controlling Music Playback
Dan Nealey
Scott Batura

2. Overview Project Concept Demonstration Implementation Evaluation
System Architecture
Demonstration
Modes of Use
Implementation
Evaluation
Future Work
Q&A

3. Project Concept Basic Description Related Work What does WristMan do?
Uses a Display Mote to control music playback via the Intel Personal Server.
Displays songs, playlists, and directories that reside on the personal server.
Control’s music file playback through a simple 4-button interface.
Who will use WristMan?
User’s that want the functionality of a stereo in a mobile format.
User’s that don’t want to carry around and interact with bulky devices.
Related Work
iPod

4. System Architecture System Functions File browsing and music control
Message Forwarding
Server-side control
Mp3 and Playlist storage
Music playback

5. Demonstration What will the demo be like? What will you show?
How to browse the media directory structure.
How the button’s are used and what functions they perform.
How to control audio playback.
What will you have the prospective user do?
Select a song or playlist to play and then control the audio output.
How does it compare to your original scenario?
Our original scenario involved streaming data to a PC for audio playback.

6. Modes of Use Browsing Playing
The entries on the corners correspond to the 4 buttons.

7. Implementation What is done? What could be done?
Welcome screen with options menu.
File browsing via the Display Mote.
Audio playback controls including play/pause, stop, track forward, track back.
What could be done?
Music timing system (fast forward, rewind).
Selecting individual songs of a playlist.
Displaying header information.
Server callbacks.

8. Evaluation How well does it work? What metrics are you using?
The system works reliably as long as the Display Mote and the Personal Server are close together.
The latency between issuing commands and receiving/processing data is minimal.
What metrics are you using?
The time required to send/receive requests to/from the Personal Server.
What data have you collected?
The longest delay in our system is approximately 1~1.5 seconds for fetching the initial contents of a directory.
What conclusions can you draw?
Our system can interact in real time with the user.

9. Future Work
What is there left to be done that won’t happen this quarter?
Adding additional aesthetic features to the User interface.
Adding a more robust protocol for transmitting data.
Usability testing.
What are some directions in which to take the project and why?
Broadcasting audio via the Slappy Board.
Using accelerometer to control audio playback.
Controlling Multiple Personal Servers.
Video.

10. Questions?