"S L" <snigdha.l@gmail.com> wrote in news:1143206565.922627.52040 @g10g2000cwb.googlegroups.com:> I shall surely contribute :-). > > Just to finish up on your comments, theoretically I can totally > understand what you are saying about the pairing up of poles and zeros. > But, unfortunately, my system wouldn't allow me to know the poles and > zeros before hand. As far as my system works fine, I wouldn't complain. > I might, in the worst case scenario, get back to this issue later. > > Thanks, > S L >What was the target DSP or ? -- Al Clark Danville Signal Processing, Inc. -------------------------------------------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com
Fractional Saving
Started by ●March 23, 2006
Reply by ●March 24, 20062006-03-24
Reply by ●March 24, 20062006-03-24
> > What was the target DSP or ? > > -- > Al Clark > Danville Signal Processing, Inc. > -------------------------------------------------------------------- > Purveyors of Fine DSP Hardware and other Cool Stuff > Available at http://www.danvillesignal.comAny 16-bit fixed point DSP. Thanks, S L
Reply by ●March 24, 20062006-03-24
"S L" <snigdha.l@gmail.com> wrote in news:1143235337.246699.198220 @j33g2000cwa.googlegroups.com:>> >> What was the target DSP or ? >> >> -- >> Al Clark >> Danville Signal Processing, Inc. >> -------------------------------------------------------------------- >> Purveyors of Fine DSP Hardware and other Cool Stuff >> Available at http://www.danvillesignal.com > > Any 16-bit fixed point DSP.With this structure, you will need to examine you coefficients carefully. 16 bits is less than ideal for many IIR requirements. You may need to code your filter with double precision inputs (and you still need a double width accumulator). -- Al Clark Danville Signal Processing, Inc. -------------------------------------------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com
Reply by ●March 24, 20062006-03-24
Al Clark wrote:> "S L" <snigdha.l@gmail.com> wrote in news:1143235337.246699.198220 > @j33g2000cwa.googlegroups.com: > > >> > >> What was the target DSP or ? > >> > >> -- > >> Al Clark > >> Danville Signal Processing, Inc. > >> -------------------------------------------------------------------- > >> Purveyors of Fine DSP Hardware and other Cool Stuff > >> Available at http://www.danvillesignal.com > > > > Any 16-bit fixed point DSP. > > With this structure, you will need to examine you coefficients carefully. > 16 bits is less than ideal for many IIR requirements. You may need to code > your filter with double precision inputs (and you still need a double > width accumulator). > > > -- > Al Clark > Danville Signal Processing, Inc. > -------------------------------------------------------------------- > Purveyors of Fine DSP Hardware and other Cool Stuff > Available at http://www.danvillesignal.comI obtain a very good output using 16-bit data, 16-bit coefficients and 32-bit accumulators. The o/p might not be bit exact with a floating point calculations, but is *great* for listening. I wouldn't complain :-). Thanks, S L
Reply by ●March 24, 20062006-03-24
"S L" <snigdha.l@gmail.com> wrote in news:1143248382.449292.222920@t31g2000cwb.googlegroups.com:> > Al Clark wrote: >> "S L" <snigdha.l@gmail.com> wrote in news:1143235337.246699.198220 >> @j33g2000cwa.googlegroups.com: >> >> >> >> >> What was the target DSP or ? >> >> >> >> -- >> >> Al Clark >> >> Danville Signal Processing, Inc. >> >> ------------------------------------------------------------------- >> >> - Purveyors of Fine DSP Hardware and other Cool Stuff >> >> Available at http://www.danvillesignal.com >> > >> > Any 16-bit fixed point DSP. >> >> With this structure, you will need to examine you coefficients >> carefully. 16 bits is less than ideal for many IIR requirements. You >> may need to code your filter with double precision inputs (and you >> still need a double width accumulator). >> >> >> -- >> Al Clark >> Danville Signal Processing, Inc. >> -------------------------------------------------------------------- >> Purveyors of Fine DSP Hardware and other Cool Stuff >> Available at http://www.danvillesignal.com > > I obtain a very good output using 16-bit data, 16-bit coefficients and > 32-bit accumulators. The o/p might not be bit exact with a floating > point calculations, but is *great* for listening. I wouldn't complain >:-). > > Thanks, > S L > >Glad to hear they are working well. The problem with audio will generally show up with high Q low frequency filters. This is where the poles will be close to the unit circle. -- Al Clark Danville Signal Processing, Inc. -------------------------------------------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com
Reply by ●March 24, 20062006-03-24
in article Xns9790D242B25Faclarkdanvillesignal@66.133.129.71, Al Clark at dsp@danvillesignal.com wrote on 03/24/2006 21:40:> "S L" <snigdha.l@gmail.com> wrote in > news:1143248382.449292.222920@t31g2000cwb.googlegroups.com: > >> >> Al Clark wrote: >>> "S L" <snigdha.l@gmail.com> wrote in news:1143235337.246699.198220 >>> @j33g2000cwa.googlegroups.com: >>> >>>>> >>>>> What was the target DSP or ? >>>>> >>>>> -- >>>>> Al Clark >>>>> Danville Signal Processing, Inc. >>>>> ------------------------------------------------------------------- >>>>> - Purveyors of Fine DSP Hardware and other Cool Stuff >>>>> Available at http://www.danvillesignal.com >>>> >>>> Any 16-bit fixed point DSP. >>> >>> With this structure, you will need to examine you coefficients >>> carefully. 16 bits is less than ideal for many IIR requirements. You >>> may need to code your filter with double precision inputs (and you >>> still need a double width accumulator). >>> >>> >>> -- >>> Al Clark >>> Danville Signal Processing, Inc. >>> -------------------------------------------------------------------- >>> Purveyors of Fine DSP Hardware and other Cool Stuff >>> Available at http://www.danvillesignal.com >> >> I obtain a very good output using 16-bit data, 16-bit coefficients and >> 32-bit accumulators. The o/p might not be bit exact with a floating >> point calculations, but is *great* for listening. I wouldn't complain >> :-). >> >> Thanks, >> S L >> >> > > Glad to hear they are working well. The problem with audio will generally > show up with high Q low frequency filters. This is where the poles will > be close to the unit circle.and where your filter coefficients will be so damn close to 1 or (or 2, but that will be normalized) that you have no damn hope to represent the coef accurately with 1.15 or 2.14 fixed-point numbers. turn up the Q and your anus gets reamed with 16 bits. -- r b-j rbj@audioimagination.com "Imagination is more important than knowledge."
