Re: Query DCT and DFT

From: "MJ" <mayurdjain@xxxxxxxxx>
Date: 25 Apr 2005 01:05:07 -0700

Hi
One more important point I found
in DCT the energy is energy compaction is very good as compaired to DFT

for ex

for DFT the energy map will be as given below for some input x
..

.
. . .. . .. .. (It will not reach to zero)
- - - - - -- --------------------------------------

for DCT the energy map will be
..

.
.
. . ( become zero)
-------------------------------------------------------

MJ

.

References:
- Query DCT and DFT
  - From: MJ

Prev by Date: [q]image combination?
Next by Date: point tracking in image sequence using particle filters
Previous by thread: Re: Query DCT and DFT
Next by thread: Re: Query DCT and DFT
Index(es):
- Date
- Thread

Relevant Pages

Re: Energy Measurement
... little energy from the 0 to Fs/4 band in the measurement as possible. ... Method one: use a DFT. ... output of this filter with the input data applied. ...
(comp.dsp)
Re: Energy Measurement
... little energy from the 0 to Fs/4 band in the measurement as possible. ... Method one: use a DFT. ... output of this filter with the input data applied. ...
(comp.dsp)
Re: DFT Blind Spot?
... than twice the sampling period. ... I am looking at how the DFT uses the ... basis functions to find cosine enrgy and sine energy at each discrete ...
(comp.dsp)
Re: Energy Measurement
... little energy from the 0 to Fs/4 band in the measurement as possible. ... Method one: use a DFT. ... output of this filter with the input data applied. ...
(comp.dsp)
Re: DFT Blind Spot?
... basis functions to find cosine enrgy and sine energy at each discrete ... The DFT "misses" the sinewave at Fs/2 because the ...
(comp.dsp)