Decimation and Interpolation Filter

[bamboo]

Hello,
What's the different between Decimation and Interpolation filter in design ?(Not say upsampling and downsampling).
Can they use the same hardware, maybe with different coefficients, in the same frequency ratio?
I am a beginer in this design. Please give your comment and suggestion
about it .
One case is list below :
for audio signal : fs=44.1kHz oversampling ratio :128fs
use third-order 8 level SDM in 24-bit audio DAC , SNR target = 96dB
How can I design the interpolation filter?

Thanks in advance.

 

[brmadhukar]

Hi,
You can use the same hardware. You should be careful to take of difference in filter lengths if any by using zero coefficient. I have only implemented a CIC decimation filter in Hardware. I hope you are referring Baese Book.
Hope this helps,
B RM

 

[bear7679]

You can find some difference between them from the book ---
‘Delta-sigma data converters --- Theory,Design,and simulation' IEEE press.
The book can be found here:

 

[bdhj]

see "Meyr, Heinrich, Marc Moeneclaey,
and Stefan A. Fechtel, Digital Communication Receivers, Wiley"
Chapter 9 in detail.

hope that helps