equalizer

hi all,

My question is about equalizers. Correct me if Iam wrong.

"Equalizers are used only in Frequency domain."

thanx.

srikoll wrote:

> hi all,
> 
> My question is about equalizers. Correct me if Iam wrong.
> 
> "Equalizers are used only in Frequency domain."
> 

It's not a particularly meaningful or well-defined statement, but making 
reasonable assumptions about what the real question is then no, the 
above statement is incorrect.

Paul

"srikoll" <sri_kolli@yahoo.com> wrote in message
news:e95f0303.0311231302.24d2c9b8@posting.google.com...
> hi all,
>
> My question is about equalizers. Correct me if Iam wrong.
>
> "Equalizers are used only in Frequency domain."

It's better to say that equalizers are used on *signals* - which have both
temporal and frequency characteristics.

It's OK to say that (audio or stereo) equalizer controls are defined in the
frequency domain.  So, if one is using an equalizer then one may be
modifying the frequency characteristics of the output.  However, this
modification also has time domain implications - in theory at least.

(There are other kinds of equalizers that deal in the time domain - such as
data transmission adaptive equalizers that seek to reduce intersymbol
interference - which is a time domain thing).

Fred

"Paul Russell" <prussell@sonic.net> wrote in message
news:Qp9wb.7671$Wy2.136093@typhoon.sonic.net...
> srikoll wrote:
> > "Equalizers are used only in Frequency domain."
>
> It's not a particularly meaningful or well-defined statement,
> Paul

To make it force to be well-defined statement, I modify it as

1. Equalizers are processed only in Frequency domain, or
2. The behavioral of equalizers is analyzed only in Frequency domain.

According on this clarification, which are assumed probably to be in-line
with the intention of the original author, the answer is apparently no. If
we change some words in the statement, it could be make sense:

1. Equalizers are processed easier in Frequency domain (than Time domain),
or
2. The behavioral of equalizers is analyzed more spontaneously in Frequency
domain.

This would be more true if we consider FFT since the convolutional operation
on Time domain for equalizaing is much exhaustive or sometimes to be brute
force work.
-- 
BR,
-- 
James K. (txdiversity@hotmail.com)
- Any remarks, proposal and/or indicator to text would be greatly
  respected.
- Private opinions: These are not the opinions from my affiliation.