Talk:Filter bank

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Should give examples of some popular filter banks, and also talk about perfect reconstruction.

Stub tag[edit]

I'm putting a stub tag to this article. There are many volumes of books on filter banks, and filter banks are being used in virtually every signal processing application nowadays.--C6H12O6 11:06, 30 November 2006 (UTC)

Errata[edit]

We say "A filter bank is an array of band-pass filters". But bandpass filters produce bandpass outputs, which are not down-converted and decimated. But many structures called "filter banks" also do the down-conversion. And subsequent synthesis algorithms must include upconversion.

We also say "With the polyphase matrix you easily answer the question for the perfect reconstruction property of a filter bank." That doesn't appear to be a correct English sentence. Besides that, I don't think it is a correct statement, because of the important detail of the design of the analysis and synthesis filters.

--Bob K (talk) 21:15, 14 September 2009 (UTC)

fredric j harris[edit]

User:spinningspark wrote: "I'm sure he uses capitalization"

So here is the actual book cover image

--Bob K (talk) 23:37, 13 December 2009 (UTC)

That is beside the point, it is still not the proper way to format a citation. SpinningSpark 19:43, 16 December 2009 (UTC)


No, that's a different point. The point is whether or not fred harris "uses capitalization". Here's another counter-example: http://electrical.sdsu.edu/faculty/frederick_harris.html And I can scan the title pages inside the book, if you like.

As to your next point, check out these edits by other editors:

http://en.wikipedia.org/w/index.php?title=Window_function&diff=next&oldid=225774556

http://en.wikipedia.org/w/index.php?title=Window_function&action=historysubmit&diff=295853906&oldid=295793664

--Bob K (talk) 22:52, 16 December 2009 (UTC)

Ok, I surrender. SpinningSpark 01:30, 17 December 2009 (UTC)

Multidimensional Filter Bank Design[edit]

Potentially a good addition to the article. But chock full of errors. Not up to Wikipedia standards. Here are some examples:

  • It has a wide application prospect, researches in this area are very important when people try to get insight to the multidimensional signal. (punctuation)
  • Also filters can be used both in one dimensional signal processing and multidimensional signal processing; and by processing the signal, we can get one or more certain kinds of signal that may be used under different kinds of conditions. (doesn't say anything useful)
  • In recent decades, sub-band handing becomes more and more popular in some fields like image & video processing, communication and so on. (verb tense)
  • However, many of signals mentioned before are hi-dimensional, which ask for the well design of hi-dimensional filter banks. (various problems)

And those are just the first paragraph, of many.

  • Oversampled filter banks are multirate filter banks where the number of channels is larger than the sampling rate.

I assume this is trying to say that the more channels you have, the less bandwidth per channel, and the lower the Nyquist rate. So a fixed sample rate will exceed Nyquist above some minimum number of channels. But "number of channels" and "sampling rate" are quantities with different units.

And so on.

--Bob K (talk) 13:06, 15 November 2013 (UTC)