3. What is Digital Audio Broadcasting? What is Digital Audio Broadcasting? FM DAB? FM DAB? Benefits of using DAB Benefits of using DAB History of DAB History of DAB The DAB system in HK The DAB system in HK What is Digital Audio Broadcasting? What is Digital Audio Broadcasting? FM DAB? FM DAB? Benefits of using DAB Benefits of using DAB History of DAB History of DAB The DAB system in HK The DAB system in HK

4. What is DAB? Analog audio signal signal Data Signal Processor A/D Converter Single Frequency Network The quick brown fox jumps right over the lazy dog tail Digital Audio Signal

5. What is DAB?

6. FM Vs DAB

8. Benefits of using DAB À No tuning anymore Radio 1 : 92.6 ~ 94.4MHz Radio 2 : 94.8 ~ 96.9MHz Radio 4 : 97.6 ~ 98.9MHz 88108

9. Benefits of using DAB Á Interference free mobile reception

10. Â Multiplex

11. Ã Dynamic Range Control

12. Benefits of using DAB Multi- media

13. Ä Multi-media

14. History of DAB Digitalization was proposed by the British Broadcasting Corporation. The NICAM system is one of their products. 80 88 90 94 97 98 99

15. History of DAB The first generation of the DAB system was demonstrated in Switzerland. 80 88 90 94 97 98 99

16. History of DAB USA did not adopt this development. They develop another digital audio system. 80 88 90 94 97 98 99

17. History of DAB Eureka- 147 The European standard (Eureka- 147) was accepted as the intl standard for DAB. 80 88 90 94 97 98 99

18. History of DAB China ran a trial in Fo Shan city, Guangdong province. A trial system was set up in HK for testing. 80 88 90 94 97 98 99

19. The DAB system in HK Digital Audio Broadcasting Steering Committee 80 88 90 94 97 98 99

20. The DAB system in HK The installation was conducted by the Two transmitters were set up. One was in Mount Gough, HK island and the other one was in Beacon Hill, Kowloon. 80 88 90 94 97 98 99

21. Beacon Hill Mt. Gough Transmitter Site Map

22. Coverage of transmitter at Mt. Gough Coverage of transmitter at Beacon Hill Transmitter Site Map

23. The DAB system in HK The project was implemented. Only music was broadcasted for testing. First phase field test was conducted to measure: audio quality, bit error rate & field strength. 80 88 90 94 97 98 99

24. The DAB system in HK Second phase field test was conducted to: Gather more information about mobile reception Explore the feasibility of text and graphics transmission Compare indoor receptions of DAD and FM signals OFTA issued DAB reports 80 88 90 94 97 98 99

25. DABs capability: Enhanced service and better sound quality for audience New market for the media sector Audio + Data = D igital A udio B roadcasting FM DAB