On Dec 21, 2010, at 8:36 PM, robert bristow-johnson wrote: > and trying to point to an obvious advantage to any windowed sinc (that you > don't have to compute the FIR when the output same lands squarely on top of > an input sample when all you need to do is copy the sample)...
Not sure if you caught my earlier comment, Robert, but what you say here is only true of half-band filters. (If I understand what you're saying correctly?) That is, if you don't want significant aliasing in the general case, your filter has to be set a bit lower, and in that case it's filtering those original points, so you can't just copy them. Of course, there are uses for half-band filters, and in those cases you do get a bonus for using them. -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
