What Is Compression And Expansion Noise Reduction?

- Jul 02, 2018-

Compressor is used to compress the dynamic range of the input signal during recording. When the sound is played, the expander is used to expand and restore to improve the noise ratio of the low-level signal. It is difficult to make the companding ends fully complementary. Distortion is prone to occur, overshoot is easily generated when the signal is suddenly increased, and noise wheeze phenomenon is also likely to occur, that is, the size of noise varies with the increase or decrease of the signal level, and therefore it is not suitable for high-fidelity recording and playback apparatus for noise reduction, but it is The basis of many noise reduction systems.

 

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