linking filters to its basic concept in delays

hi,

im new here and i would like to ask some questions about this topic;
linking filters to its basic concept in delays. are there any notes that i
can get from you guys? in the net? any theory about it? if there is, can
you share it? thank you so much...;)

inblo0m wrote:
> hi,
> 
> im new here and i would like to ask some questions about this topic;
> linking filters to its basic concept in delays. are there any notes that i
> can get from you guys? in the net? any theory about it? if there is, can
> you share it? thank you so much...;)
> 
> 

 From a fellow newbie, the short answer will be yes.
Some useful links are:
      http://www.bdti.com/faq/dsp_faq.htm
      http://www.dspguide.com/
      http://www.dspguru.com/info/tutor/index.htm
      http://www.bores.com/courses/intro/

They should assist you in rephrasing your question.

Taking a stab in the dark, there might be two directions you could look at
1) an "analog" (continuous-time) filter is described by its impulse
response
2) an "analog" (continuous-time) signal can be represented by a series of
samples

Combining 1) and 2) leads to finite impulse response (FIR) filters.

-mn

PS: Using the word "analog" as above is forbidden without a valid permit
(i.e. having passed the Turing test) 

On 23 Nov, 13:29, "inblo0m" <louie_am...@yahoo.com> wrote:
> hi,
>
> im new here and i would like to ask some questions about this topic;
> linking filters to its basic concept in delays. are there any notes that i
> can get from you guys? in the net? any theory about it? if there is, can
> you share it? thank you so much...;)

Check out

Leander: "On the relation between the wavefront speed and the group
             velocity concept" The Journal of the Acoustical Society
of America,
             Volume 100, Issue 6, December 1996, pp.3503-3507

The author discusses various concepts relating to wave speed in
acoustic media, where the maths is very similar to time delays
through a filter. "Group velocity" in acoustics corresponds directly
to "group delay" in a filter, and similar for "phase velcity" and
"phase delay."

Rune

On 23 Nov, 14:58, "mnentwig" <mnent...@elisanet.fi> wrote:
> Taking a stab in the dark, there might be two directions you could look at
> 1) an "analog" (continuous-time) filter is described by its impulse
> response
> 2) an "analog" (continuous-time) signal can be represented by a series of
> samples
>
> Combining 1) and 2) leads to finite impulse response (FIR) filters.

You are *that* sure the OP is a troll?

Rune

Nope, sorry. My answer was genuine. 
Maybe you do understand the question better than I do, though.

-mn

Rune Allnor wrote:
(snip)

> The author discusses various concepts relating to wave speed in
> acoustic media, where the maths is very similar to time delays
> through a filter. "Group velocity" in acoustics corresponds directly
> to "group delay" in a filter, and similar for "phase velcity" and
> "phase delay."

I would say "group delay" is distance divided by "group velocity",
similar for "phase delay" and "phase velocity."

That makes them inversely proportional.

-- glen

On 24 Nov, 01:36, glen herrmannsfeldt <g...@ugcs.caltech.edu> wrote:
> Rune Allnor wrote:
>
> (snip)
>
> > The author discusses various concepts relating to wave speed in
> > acoustic media, where the maths is very similar to time delays
> > through a filter. "Group velocity" in acoustics corresponds directly
> > to "group delay" in a filter, and similar for "phase velcity" and
> > "phase delay."
>
> I would say "group delay" is distance divided by "group velocity",
> similar for "phase delay" and "phase velocity."

Careful! Stating the obvious would amount to belittle the OP's
intelligence. I was accused of that only a couple of days ago.

Rune

thank you so much guys...;)

On Nov 23, 7:29 am, "inblo0m" <louie_am...@yahoo.com> wrote:
> hi,
>
> im new here and i would like to ask some questions about this topic;
> linking filters to its basic concept in delays. are there any notes that i
> can get from you guys? in the net? any theory about it? if there is, can
> you share it? thank you so much...;)

Louie,

I've read several responses from other people who seem to understand
(or think they understand) what your question means. I don't. I can't
guess what "the basic concept [of a filter] in delays" might mean to
you. I don't want to imply that it has no meaning; it just doesn't
mean anything to me. Maybe the question is based on an assumption that
I don't recognize. Would you mind expanding on what you're trying to
grok?

Jerry
--
Engineering is the art of making what you want from things you can get.