Juan Monroy — Outline: Lecture 2, Electronic Media Technology

1 announcements
- 1.1 syllabus on website is now current
- juanmonroy.com—electronicmedia http://juanmonroy.com/electronicmedia/
- 1.2 quizzes are now due on Mondays not Fridays
2 facsimile
- 2.1 fidelity
  - faithfulness
- 2.2 transduction
  - energy
    - sound waves
    - light beams
  - electronic signal
    - analog of the original
  - digital bits and bytes
    - binary code
      - 1
      - 0
3 oscillation
- 3.1 vibrations
- 3.2 waveform
- 3.3 wavelength
  - speed
  - frequency
  - Hertz
- 3.4 wave height
  - intensity
  - amplitude
  - dB
- 3.5 frequency response
  - effect on fidelity
4 Electronic Media The Dominick textbook discusses five steps in electronic media. In class, I covered only three, but you should know all five. The following are the five steps in very basic form.
5 signal generation
- 5.1 microphones
  - dynamic
    - diaphragm
    - electromagnet
    - voice coil
  - velocity
  - condenser
- 5.2 digital audio
  - process
    - sound transduced into electrical current
    - converted to samples
    - quantization: coded and stored as binary data
- 5.3 video
  - scanning
    - interlacing
    - retracing
    - fields
    - frames
  - analog standards
    - NTSC
      - 525-lines
      - 60 Hz
      - 30 frames per sec
    - PAL
      - 625-lines
      - 50 Hz
      - 25 frames per sec
  - digital television
    - Advanced Television Systems Committee
    - high definition
      - 1080-lines
      - 1920 pixels per line
      - 60 Hz
    - progressive scanning
  - aspect ratio
    - 4:3
    - 16:9
6 amplification and processing
- 6.1 audio
  - amplifier
    - vacuum tube
    - transistors
    - integrated circuits
  - mixing consoles
  - computer mixing programs
- 6.2 video
  - switcher
  - fader
  - [chroma] keying
  - video effects
  - desktop video
    - Final Cut Pro
    - Avid Media Composer
7 transmission
- 7.1 electromagnetic spectrum
  - carrier waves
  - modulation
  - radio frequencies
  - effective radiated power
  - height above average terrain
- 7.2 broadcast radio
  - amplitude modulation
    - 540 – 1610 KHz
    - clear channel
    - regional channels
    - local channels
  - frequency modulation
    - 88–108 Mhz
    - 200 KHz bandwidth
  - channel separation
    - avoid interference
  - sidebands
    - stereo multiplexing
    - HD subchannels
- 7.3 broadcast television
  - television channels
    - NTSC
    - 6 MHz bandwidth
  - VHF band
    - channels 2–13
  - UHF band
    - channels 14–83
- 7.4 satellite
  - C-band
  - Ku-band
  - direct broadcast satellite
    - 1994
    - Ka-band
    - DirecTV
    - Dish
  - digital audio broadcasting
    - 2002
    - XM Radio
    - Sirius
- 7.5 coaxial cable
  - copper wire
  - electrical signal
  - oldest wiring technology
  - low-ish resistance
  - loss of signal over great distances
- 7.6 fiber optic cable
  - glass tubes and mirrors
  - light carrying signal
  - fast
  - little loss of signal over long distance
- 7.7 cellular radio
  - Global System Mobile
  - Code Division Multiple Access
- 7.8 WiFi
  - 802.11
  - 2.4 or 5 GHz
8 reception
- 8.1 radio receivers
  - AM
  - FM
  - satellite radios
- 8.2 television receivers
  - analog television
  - digital television
    - HDTV
9 storage and retrieval
- 9.1 phonographic records
- 9.2 magnetic tape
- 9.3 magnetic hard disk
- 9.4 magnetic video tape
- 9.5 2-inch open reel
  - 1956
- 9.6 ¾ inch VTR
- 9.7 home videocassettes
  - ½ inch videotape
  - Betamax
    - Sony 1976
  - VHS
    - Matsushita 1977
- 9.8 digital videotape
  - MiniDV
  - DVCAM
- 9.9 DVD
  - fasted adopted media recording technology
  - 90% penetration by 2002 (five years)
- 9.10 digital video recorder
  - personal video recorder
  - time-shifted viewing