![Q. Is it inevitable that all broadcasting will go digital? ,[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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TVU Tech Episode 1 extra information
- 1. Fundamentals of Analogue and Digital Broadcasting BSc. Media Technology May 2007
- 6. A/C signal Volts + - Time
- 7. Waveforms: Sine waves Complex waves
- 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
- 14. Bandwidth
- 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
- 20. Compression
- 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