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15 Cards in this Set
- Front
- Back
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fidelity
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degree of correspondence between a reproduced signal and the original
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noise
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unwanted interference in a video or audio signal
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signal to noise ratio
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amount of desired picture or sound information that remains after subtracting unwanted interference.
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analog signal
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oscillation signal that resembles an original sound or image; for example, a phonograph record contains analog signals.
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oscillation
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vibration of radio waves.
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frequency
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number of waves that pass a given point in a given time period, usually a second; measured in hertz (Hz)
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wavelength
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distance between two corresponding points on an electromagnetic wave.
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amplitude
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height of a wave above a neutral point
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frequency response
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range of frequencies that a radio set is cable of receiving
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digital audio tape (DAT)
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high-quality audio tape that uses the same digital technology as a CD.
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MP3
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recording compression technique that makes it possible to share audio files over the internet
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scanning
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technique by which the bean of electrons inside a TV camera traces its way across an image
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frame
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two fields or one complete TV picture; one frame is scanned every thirtieth of a second.
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high-definition television (HDTV)
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improved resolution TV system that uses approximately 1100 scanning lines
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synchronization pulse
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signal that enables the output of two or more camera and other video sources to be mixed together and also keeps that scanning process in the camera operating in time to coincide exactly with the retrace process in the TV receiver.
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