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noise reduction
(redirected from Audio noise reduction)

   Also found in: Wikipedia 0.01 sec.
noise reduction [′nȯiz ri‚dək·shən]
(engineering acoustics)
A process whereby the average transmission of the sound track of a motion picture print, averaged across the track, is decreased for signals of low level; since background noise introduced by the sound track is less at low transmission, this process reduces noise during soft passages.

noise reduction, NR
The difference in decibels between the average sound pressure levels produced in two rooms by a sound source in one of them.


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Audio noise reduction technology group Dolby and retailer Wal-Mart buoyed the US market, but chip stocks disappointed after order books fell for the fifth month running.
True 9-bit digital video processing and dbx audio noise reduction produce decoded signals that meet recognized broadcast standard in the NTSC and PAL formats.
Thanks to Dolby Laboratories' unique experience with audio noise reduction, Dolby Digital yields higher sound quality and allows multichannel surround sound to be encoded at a lower bit rate than is required by just one channel on a compact disc.
 
 
 
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