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Phase Delay and Group Delay
Phase Response
:
Phase Delay
:
(Phase Delay)
Group Delay
:
(Group Delay)
For a slowly modulated
sinusoidal
input
signal
, the output signal is
where
is the
amplitude response
.
Unwrap
phase response
to uniquely define it:
or
for
real filters
Discontinuities in
cannot exceed
radians
Phase jumps
radians are
equivalent
See
Matlab
function
unwrap
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Download
Delay.pdf
Download
Delay_2up.pdf
Download
Delay_4up.pdf
``
Computational Acoustic Modeling with Digital Delay
'', by
Julius O. Smith III
and
Nelson Lee
,
REALSIMPLE
Project — work supported by the
Wallenberg Global Learning Network
.
Released
2008-06-05
under the
Creative Commons License (Attribution 2.5)
, by
Julius O. Smith
III and Nelson Lee
Center for Computer Research in Music and Acoustics (CCRMA),
Stanford University