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this is A slide show that helps Illustrate the fundamentals of digital and analog broadcasting

TechnologyEntertainment & Humor
1 of 25
Fundamentals of Analogue and Digital Broadcasting BSc. Media Technology May 2007
Q. Is it inevitable that all broadcasting will go digital? ,[object Object],[object Object],[object Object]
Q. Is it inevitable that all broadcasting will go digital? ,[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],Common Terms
Define the term Analogue: ,[object Object],[object Object],[object Object]
A/C signal Volts + - Time
Waveforms: Sine waves Complex waves
Analogue: ,[object Object],[object Object],[object Object]
[object Object],Digital
Define the term Digital: ,[object Object],[object Object],[object Object]
PCM - Pulse Code Modulation + 2 = (10010011), + 4 = (10010100), - 1 = (01101100) Voltage Time 5 4 3 2 1 0 1 2 3 4 5 + -
PCM - Pulse Code Modulation Volume Time
Advantages: ,[object Object],[object Object],[object Object],[object Object]
Bandwidth
Bandwidth ,[object Object],[object Object]
Bandwidth ,[object Object],[object Object]
Electro-magnetic Radio Spectrum
30 GHz EHF 3 GHz SHF 300MHz UHF 30MHz VHF 3 MHz 300 KHz 30 KHz Radio Spectrum 150 -300 KHz Long Wave AM 500 -1600 KHz Medium Wave AM 6 -18MHz Short Wave AM 88 -108 MHz FM 10.7 -12.7 GHz Satellite TV 217 -230 MHz DAB radio 470 -840 MHz Terrestrial TV 1800 MHz PCN Mobile phones 900 MHz GSM Mobile phones 2320 - 2345 S Band Digital Radio 1470 - 1490 MHz L Band Digital Radio Other used frequencies: Police, emergency services, military, navigation, CB radio, toys, microphones,WiFi, Bluetooth, etc.
Bandwidth Examples showing bits per second Modem 56 kbit ADSL 4 Mbit CD audio 1.4 Mbit DVD 9.6 Mbit HDTV & DV video 25 Mbit BluRay disc 54 Mbit/sec
Compression
Compression ,[object Object],[object Object],[object Object]
Codecs ,[object Object],[object Object],[object Object],[object Object]
Codec examples: ,[object Object],[object Object],[object Object],[object Object]
Compression Examples stereo audio files AAC-HE 48 kbit/sec Uncompressed CD audio 1.4 Mbit/sec MiniDisc 282 Kbit/sec MP3 128 Kbit/sec
Summary: ,[object Object],[object Object],[object Object]

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TVU Tech Episode 1 extra information

  • 1. Fundamentals of Analogue and Digital Broadcasting BSc. Media Technology May 2007
  • 2.
  • 3.
  • 4.
  • 5.
  • 6. A/C signal Volts + - Time
  • 7. Waveforms: Sine waves Complex waves
  • 8.
  • 9.
  • 10.
  • 11. PCM - Pulse Code Modulation + 2 = (10010011), + 4 = (10010100), - 1 = (01101100) Voltage Time 5 4 3 2 1 0 1 2 3 4 5 + -
  • 12. PCM - Pulse Code Modulation Volume Time
  • 13.
  • 15.
  • 16.
  • 18. 30 GHz EHF 3 GHz SHF 300MHz UHF 30MHz VHF 3 MHz 300 KHz 30 KHz Radio Spectrum 150 -300 KHz Long Wave AM 500 -1600 KHz Medium Wave AM 6 -18MHz Short Wave AM 88 -108 MHz FM 10.7 -12.7 GHz Satellite TV 217 -230 MHz DAB radio 470 -840 MHz Terrestrial TV 1800 MHz PCN Mobile phones 900 MHz GSM Mobile phones 2320 - 2345 S Band Digital Radio 1470 - 1490 MHz L Band Digital Radio Other used frequencies: Police, emergency services, military, navigation, CB radio, toys, microphones,WiFi, Bluetooth, etc.
  • 19. Bandwidth Examples showing bits per second Modem 56 kbit ADSL 4 Mbit CD audio 1.4 Mbit DVD 9.6 Mbit HDTV & DV video 25 Mbit BluRay disc 54 Mbit/sec
  • 21.
  • 22.
  • 23.
  • 24. Compression Examples stereo audio files AAC-HE 48 kbit/sec Uncompressed CD audio 1.4 Mbit/sec MiniDisc 282 Kbit/sec MP3 128 Kbit/sec
  • 25.