User`s guide

Dyadic Synthesis Filter Bank
5-162
The figure below shows the input and output sample periods for the four
64-channel sample-based inputs to a three-level filter bank. The fastest input
has a period of 2, so the output period is 1.
Frame-Based Operation
An M
i
-by-N frame-based matrix input is treated as N independent channels,
and the block filters each channel independently over time. The number of
columns in the output is the same as the number of columns in the input.
All inputs must have the same frame period, which is also the output frame
period. The different input sample rates should be represented by the input
frame sizes: If the input to the top port has frame size M
i
, the input to the
second-from-top port should have frame size M
i
/2, the input to the
third-from-top port should have frame size M
i
/4, and so on. The input to the
bottom port should have the same frame size as the second-from-bottom port.
The increase in the sample rate of the output is also represented by its frame
size, which is twice the largest input frame size.
The relationship between sample periods, frame periods, and frame sizes is
shown below for a four-channel frame-based input to a three-level filter bank.
T
so
= 1
T
si
= 2
T
si
= 4
T
si
= 8
T
si
= 8
T
fo
=1
T
so
=1/64
(T
si
=1/32)
(T
si
=1/16)
(T
si
=1/8)
(T
si
=1/8)
T
fi
= 1