Elements of a television system

Elements of a television system

  • An image source. This is the electrical signal representing the visual image, and may be from a camera in the case of live images, a video tape recorder for playback of recorded images, or a film chain-telecine-flying spot scanner for transmission of motion pictures (films).
  • A sound source. This is an electrical signal from a microphone or from the audio output of a video tape recorder or motion picture film scanner.
  • A transmitter, which generates radio signals (radio waves) and encodes them with picture and sound information.
  • An antenna coupled to the output of the transmitter for broadcasting the encoded signals.
  • An antenna to receive the broadcast signals.
  • A receiver (also called a tuner), which decodes the picture and sound information from the broadcast signals, and whose input is coupled to the antenna.
  • A display device, which turns the electrical signals into visual images.
  • An audio amplifier and loudspeaker, which turns electrical signals into sound waves (speech, music, and other sounds) to accompany the images.

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