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Audio Over Bluetooth

Audio Over Bluetooth. Author: Rory McCrave University of Central Florida Course: EEL4781-0M01 Instructor: Dr. Janusz Zalewski Date: April 15, 2002. Contents of Presentation. Problem Description Design Solution Case Study Conclusion. Problem Description.

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Audio Over Bluetooth

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  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 SolutionBluetooth 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 ConnectionOriented (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. 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. 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?

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