1) Radio was discovered in the late 1800s by scientists experimenting with electromagnetic waves, including Hertz proving their existence in 1888 and Marconi demonstrating wireless telegraphy could achieve transatlantic communication by 1901. 2) In Hong Kong, radio broadcasting is regulated and several public and commercial stations exist, including Radio Television Hong Kong as the main public broadcaster and Commercial Radio Hong Kong as a major commercial operator. 3) Digital technologies have expanded broadcasting options, as exemplified by the development of digital audio broadcasting (DAB) in Europe and online radio services available in Hong Kong.

1. Radio
Lai Lap Kwan Swena 20129856

2. • Никола Тесла discover that radio is similar as basic
electronic communication
1873 • Basic foundation of transfer the message through radio
• Hertz (German) prove the existence of electromagnetic
wave
1888 • 1967 Hertz become the name of frequency wave
• Leicester (American) prove the vacuum tube can bring high
frequency wave for radio
1906 • 1910 Leicester become the father of broadcasting

3.  Digital Audio Broadcasting (DAB)
 Amplitude Modulation (AM)
 Frequency Modulation (FM)
 Secret Radio

4.  Another name : EUREKA 147
 1980 DAB published to the public
 2006 About 100 countries use Digital Audio
Broadcasting (DAB) to broadcast to the public
Advantages Disadvantages
Fidelity of sound Quality of sound < FM
Broadcast > 1 channel Bit of the sound
at the same time
Solve the problem of
noisy

5.  Baseband + Carrier Wave = Broadband
 1980 Carrier Wave : 530 – 1700 kHz
 1990 Carrier Wave : 1620 – 1700 kHz
Advantages Disadvantages
Easy to explore Fidelity of sound
Radar Echo is strong AM < FM
No need to use power
source

6.  1935 Edwin Armstrong publish FM
 Include stereophonic
 Similar as W-FM
Advantages Disadvantages
Interference ability is Frequency of sound is
strong drift
simple signal Easy to disturb by
amplitude fading other frequency
phenomena channel
Fidelity of sound Selectivity

7. Countries Nature
Taiwan • Centralize in the middle & Southern
of Taiwan
• Call-in service is provided
Hong Kong • Have to approve by Television and
Entertainment Licensing Authority
(TELA)
• Online broadcast service also
provided
China • Forbid any radio channel, so secret
radio is common
• Secret Radio focus on medical
treatment programme

8.  Radio Television Hong Kong (RTHK)
 Metro Broadcasting Corporation Limited
 Commercial Radio Hong Kong
 MyRadio.com.hk

9.  The 1st broadcasting company in Hong Kong
 Managed by Commerce and Economic
Development Bureau (CEDB)
 Unique public broadcasting company in Hong
Kong
Radio 1 Radio 2 Radio 3 Radio 4
(Cantonese) (Cantonese) (English) (Classical Music)
Radio 5 Radio 6 Putonghua
Teen Power
(Chinese Music) (BBC News) Radio

10.  Business Broadcasting Company
 Main purpose : Entertainment
MetroInfo Metro Finance AM1044 Metro
(Cantonese) (Cantonese) Plus (English)
Metro Finance Metro Music
Digital Digital
(Online) (Online)

11.  881 Special is under Commercial Radio Hong
Kong
 Business Broadcasting Company
Home 881 Home903
(Commercial (Commercial
Radio 1) Radio 2)
Hong Kong
AM864
Toolbar
(English)
(Online)

12.  Online Radio Channel
 Operation style : unique online radio
 Cooperation with Hong Kong People Reporter
before

13.  http://zh.wikipedia.org/zh-
hk/%E9%9B%BB%E5%8F%B0
 http://zh.wikipedia.org/wiki/%E9%A6%99%E6
%B8%AF%E5%BB%A3%E6%92%AD%E9%9B%BB%E
5%8F%B0%E5%88%97%E8%A1%A8
 http://zh.wikipedia.org/wiki/Radio_Hong_Ko
ng
 http://www.metroradio.com.hk/#
 http://myradio.com.hk/
 http://www.881903.com/Page/ZH-
TW/index.aspx