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A technique for reducing noise in recording or transmission systems. Single-ended noise reductionDefinition:
A technique for reducing noise in recording or transmission systems. Single-ended noise reduction systems use filtering to isolate the noise, and expand this signal downward using downward expansion. See Expansion and Downward Expansion. Double-ended systems use symmetrical compression and expansion. See Compansion. systems use filtering to isolate the noise, and expand this signal downward using downward expansionDefinition:
With an expander, expanding an audio signal's dynamic range so that input signals below a threshold become progressively softer at the output than they are at the input. See Expander. Cf. Upward Expansion.. See Expansion and Downward Expansion. Double-ended systems use symmetrical compressionDefinition:
1. Reducing the dynamic range of an audio or video signal for consistency, to keep it from exceeding the available headroom, or providing a special effect. 2. With data, using a process to reduce the amount of data. Compression can be lossless, where decompressing replicates the original signal, or lossy, where compression occurs by judging some data as unnecessary, and can therefore be discarded from the file. and expansion. See CompansionDefinition:
A method of increasing dynamic range and lowering the noise of a recording or transmission system by compressing the input and proportionately expanding the output..