Noise Shaping

The Music Telegraph | Text 2019/03/20 [14:53]

Noise Shaping

The Music Telegraph| 입력 : 2019/03/20 [14:53]

▲ Quantized output spectrum with and without noise shaping

© DSPRelated.com

 

 

 

Noise Shaping

 

- Moving dither noise (=white noise) to frequency that are less sensitive (to the human ear)

- White noise is filtered away from frequency sensitive area 

- Purpose: To increase the apparent signal-to-noise ratio of the resultant signal

*Result: Can have 120 dB Dynamic Range (perceptual)

 

 

▲ Noise Shaping around 3.2 ~ 3.8 kHz area

© The Music Telegraph



 

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