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Altera_Forum
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15 years ago

Round or truncate? 截取和舍入对滤波器输出精度影响？

turncat and rounding on the accuracy of the filter output? designing filter with Fpga, there are two output modes, turncut and rounding. What effect on accuracy on Both methods have? Is t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi Kaz,

thanks a lot for yuor reply.

I still has something unclear about "DC bias "and "Noise". Any clarification appreciated.

In your table, how can "DC bias "and "Noise" for the 4 examples of truncation algorithms . Take the truncate algorithms for example，

truncate

-7/2 -3.5 -4 dc= -4+3.5= -0.5 Noise=？？？

-5/2 -2.5 -3 dc= -3+2.5= -0.5 Noise=？？？

-3/2 -1.5 -2 dc= -2+1.5= -0.5 Noise=？？？

-0.5 n/a

0.5 n/a

3/2 1.5 1 dc= 1-1.5= -0.5 Noise=？？？

5/2 2.5 2 dc= 2-2.5= -0.5 Noise=？？？

7/2 3.5 3 dc= 3-3.5= -0.5 Noise=？？？

but how "noise" ???