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Transposed Tapped Delay Line (TTDL)
A flow-graph is
transposed
(or ``reversed'') by reversing all
signal
paths.
Branchpoints become sums
Sums become branchpoints
Input/output exchanged
Transfer function
identical
for SISO systems
Derives from
Mason's gain formula
Transposition converts
direct-form I
, II
digital filters
to two more
direct forms
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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