TI E2E Community
Digital Signal Processors (DSP)
C6000 Multicore DSP
C64x Multicore DSP Forum
Please teach me why wallfilter is IIR.
My name is Masatoshi nakashima,
I am learning ultrasound signal processing.
Please teach me about wallfilter algorithm.
In Application Report SPRAB11–November 2008
"Efficient Implementation of Ultrasound Color DopplerAlgorithms on Texas Instruments’ C64x™ Platforms",
there is a explanation of wallfilter.
"This module does an IIR filtering operation.
The basic operation done for filtering for each scan-line set is a multiplication of complex inputdata matrix, X, with real coefficient matrix, W, given by,
Y DxN =X DxN * W NxN "
I can not understand why this equation expresses IIR. I think IIR should have feedback input.
(1) Please teach me, what is feedback element in this matrix conversion equation.
(2)Please teach me, how to design W matrix.
Please pardon me for my poor knowledge.
This is a follow by myself. I read "Clutter Filter Design for Ultrasound Color Flow Imaging",
I understood IIR design method a little.
(1) what initialization method is adopted in the wall filter of MIDAS demo V3?
(2) Please teach the design parameter of the wall fileter of MIDAS demo v3.
This post should answer your 2 questions:
--- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---
Thank you for your answer. I read the post which was shown me.
But I can not found wf_coeff.m.
Please teach me where it is.
And I can not found(understand ) the method of the filter initialization in the post.
Dear Mr. Gurnari,
I have read the post that you show me.
I can not find wf_coeff.m . Please teach me where it is.
The STK-MED that the e2e post refers to is the Medical Imaging Software Toolkit (STK-MED). You can download the latest STK-MED v3.0 from http://www.ti.com/tool/s2meddus and the file is located at 'stk-med-03.xx.xx.xx\miAlgos\dpu\test\vectors\wf_coeff.m'
Thank you for your quick answer. I have read wf_coff.m.
I have understood this filtering.
Thank you again.
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