[music-dsp] why 3/4 in quantization?

Al Clark aclark at danvillesignal.com
Mon Jan 19 06:33:00 EST 2004

At 04:44 AM 1/19/2004, you wrote:
>hi all,
>Can anyone plz tell why 0.75 is used as a power in quantizing audio? why 
>not anyother fraction?
>what is the significance of this fraction?

Are you referring to dBm?

0dBm = 20 log ((.775 Volts )^2/ 600 Ohms

..775V is therefore the voltage needed to create 1 mW into 600 ohms

Al Clark
Danville Signal Processing, Inc.
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com

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