1. Audio Over Bluetooth Author: Rory McCrave
University of Central Florida
Course: EEL4781-0M01
Instructor: Dr. Janusz Zalewski
Date: April 15, 2002

2. Contents of Presentation
Problem Description
Design Solution
Case Study
Conclusion

3. Problem Description
Satisfy business demand for wireless communication solutions
Satisfy consumer demand for wireless multimedia products
Satisfy the need for a “Wireless Standard”

4. Design Solution Bluetooth Technology
Synchronous Connection-Oriented (SCO) channels
Robust Compression CODEC
Log PCM- A-law or m-law compression
Continuous Variable Slope Delta Modulation
Low Noise Transmission
Bluetooth Audio Signal Processor

5. Position of Audio in the Bluetooth Protocol Stack

6. Synchronous Connection Oriented (SCO) channels

7. Robust Compression CODEC
CVSD Encoder

8. CVSD Modulation Signal

9. Low Noise Transmission
Frequency Hopping Scheme

10. Bluetooth Audio Signal Processor
Encoder
Decoder

11. Case Study - Toshiba Bluetooth Enabled Headset
Voice-Recognition/Outputs Digital Control Signal - to control other bluetooth enabled devices
High Quality Audio Reproduction - for the hi-fi wireless monitoring of various audio devices

12. TV PC “The sky is blue.” Home Stereo System Figure 1 Voice Control/
Dictation Function
Bluetooth
Enabled TV
Digital Control
Signals are Sent
Vocalization
The sky is blue.
“STEREO ON”
TV CHANNEL
UP” PC
“The sky is blue.”

13. Stereo or TV Audio TV MP3 Audio PC Figure 2 High Quality
Audio Monitoring
Bluetooth
Enabled TV
Stereo or TV Audio
MP3
Audio
MP3 PC

14. Commercialization of Headsets
Price: Under $76
Weight: 100 grams
Battery: lithium-ion rechargeable battery
Battery life: 5 hours
Safety: Electromagnetic Radiation not harmful because of its high operating frequency and low power output

15. Conclusion Standardization of Bluetooth
Advantages of Bluetooth Audio Technology
Disadvantages of current Bluetooth Audio
Future Expectations for Bluetooth Enabled Products

16. Thank You!
Any Questions?