Electronic Journalism

Lesson 01 : Introduction to Electronic Media

Glossary of Words on Electronic Media

• Television:
  Television broadcasting is the transmission of visual images, generally with accompanying sound , in the form of electromagnetic waves that when received can be reconverted into visual images.
• Very High Frequency: (VHF)
  A band of radio frequencies falling between 30 and 300 MHz; VHF signals are widely employed for television and radio transmissions . In the United States and Canada, television stations that broadcast on channels 2 through 13 use VHF frequencies, as do FM RADIO stations. Many amateur radio operators also transmit on frequencies within the VHF band.
• Ultra High Frequency: (UHF)
  A band of radio frequencies from 300 to 3000 MHz;UHF signals are used extensively in television broadcasting , typically carrying television signals on channels 14 through 83.
• Broadcast live:
  Broadcast while actually being performed; not taped, filmed or recorded.
• Cable television:
  The process of sending TV signals to subscribers through a wire. Cable. Television started, as a community antenna television (CATV) service for small towns and suburbs that needed better reception.
• Videocassette recorder: (VCR)
  An electronic device for recording and playing back video images and sound on a videocassette tape.
• Digital versatile disk: (DVD)
  An optical disk technology with two layers on each of its two sides, holding up to 17 gigabytes of video, audio, or information; DVD-video is the usual name for the DVD format designed for full-length movies and played through a box that will work with your television set.
• Direct- to –home satellite service: (DTH)
  A digital technology that delivers up to 150 channels to a plate-side receiver on a subscriber’s house; these services include the DBS format in the united states and the DVB format in much of the rest of the world.
• Direct broadcast satellite: (DBS)
  Technology that allows a household to receive hundreds of channels which are delivered digitally to a small dish installed on a side of house or apartment building; a set top box converts the digital signals to analog signals that are accepted by the TV. The DBS satellites operate from orbits directly above the earth’s equator and just over 22,000 miles up.