Dolby A-type noise reduction
E63060
Dolby A-type noise reduction is a professional analog audio noise reduction system developed by Dolby Laboratories to reduce tape hiss in recording and film sound.
Aliases (2)
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
audio noise reduction system
→
professional analog audio technology → |
| appliedTo |
low-level high-frequency content
→
mid-frequency bands → |
| bandCount |
4
→
|
| characteristic |
frequency-selective processing
→
level-dependent compression and expansion → |
| componentOf |
Dolby motion picture sound systems
→
|
| developer |
Dolby Laboratories
→
|
| distinguishedFrom |
Dolby B noise reduction
→
Dolby C noise reduction → Dolby SR noise reduction → |
| effectOnProgramMaterial |
reduces background hiss without significantly affecting wanted signal
→
|
| field |
audio engineering
→
film sound → sound recording → |
| frequencyRange |
approximately 80 Hz to 15 kHz
→
|
| implementationForm |
integrated modules in mixing consoles
→
outboard rack units → |
| introducedBy |
Ray Dolby
→
|
| introducedInDecade |
1960s
→
|
| introducedYearApproximate |
1965
→
|
| marketSegment |
professional audio
→
|
| medium |
analog magnetic tape
→
|
| noiseReductionAmount |
up to about 10 dB per band
→
|
| notDesignedFor |
consumer cassette decks
→
|
| processingMethod |
decode during playback
→
encode during recording → |
| processingType |
multiband
→
|
| purpose |
improve signal-to-noise ratio
→
reduce tape hiss → |
| requires |
matched encoder and decoder
→
|
| status |
largely superseded by later Dolby systems
→
|
| successor |
Dolby B noise reduction
→
Dolby SR → |
| technologyType |
compander
→
|
| totalNoiseReduction |
up to about 15 dB
→
|
| typicalUseCase |
dialogue and effects tracks in film
→
multitrack music recording → |
| use |
broadcast audio chains
→
film post-production → professional recording studios → |
| usedWith |
35 mm optical film soundtracks
→
magnetic film soundtracks → multitrack tape recorders → stereo master recorders → |
Referenced by (3)
| Subject (surface form when different) | Predicate |
|---|---|
|
Dolby Laboratories
("Dolby noise reduction system")
→
|
notableFor |
|
Dolby Laboratories
("Dolby Noise Reduction")
→
|
products |
|
Dolby Stereo
→
|
usesTechnology |