Regarding the IIR hardware accelerator on the ADSP-2148x is it possible to implement a state variable filter or does it limit you to the Transposed Direct Form II Biquad ?
I am not sure if I am the right person to answer this query of yours as it is a very generic question and not specific to SHARC processors. However I found this link, which I think will be useful for your purpose:
Please let me know if you have any SHARC processor specific queries/doubts. I will be glad to help you out with that.
As mentioned in page 415/1276 of the ADSP-214xx Hardware Reference Manual, the IIR accelerator is implemented using transposed Direct Form II biquad , which has less coefficient sensitivity.
The link for the manual is given below:
Please let me know in case you have any further queries/doubts.
Can anyone tell me whether the Transposed Direct Form II biquad has lower noise performance for low frequencies because this was an issue with the biquad in the run time library ?
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