About the Noise Shapers

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Noise shaper characteristics

Each noise shaper presents a different degree of subjective noise reduction – we call that its ‘advantage’ – compared with normal dithering using white TPDF dither. Each shaper also has a different degree of HF boost. The parameters are summarised in the table below.

Shaper

 

 

Advantage

 

 

 

 

 

 

 

 

 

 

 

44.1kHz

 

48kHz

 

 

 

 

 

 

 

 

Normal

 

Pre-emphasis

Normal

 

Pre-emphasis

 

 

 

 

 

 

 

Flat TPDF

0.0dB

 

3.4dB

0.0dB

 

3.4dB

 

 

 

 

 

 

 

High-pass

3.5dB

 

7.0dB

3.5dB

 

7.0dB

 

 

 

 

 

 

 

Shape A

6.4dB

 

12.2dB

6.4dB

 

12.2dB

 

 

 

 

 

 

 

Shape B

19dB

 

22.6dB

19.6

 

23.6dB

 

 

 

 

 

 

 

Shape C

15.1dB

 

17.9dB

18.6dB

 

21.4dB

 

 

 

 

 

 

 

Shape D

15.3dB

 

21.5dB

19.9dB

 

23.5dB

 

 

 

 

 

 

 

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