Noise reduction

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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

Reducing the level of unwanted sound by any of several means of acoustical treatment.

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.
References in periodicals archive ?
In particular, it provides both fade processing for audio noise reduction and video complementation processing using concealing processing to supplement missing data so that it can output as smooth audio and video as possible even in cases where television broadcast reception conditions are poor.
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.