LF3310
DEVICES INCORPORATED
Horizontal / Vertical Digital Image Filter
LF3310
DEVICES INCORPORATED
Horizontal / Vertical Digital Image Filter
DESCRIPTION
The
LF3310
is a two-dimensional digital
image filter capable of filtering data at
real-time video rates. The device
contains both a horizontal and a
vertical filter which may be cascaded or
used concurrently for two-dimensional
filtering. The input, coefficient, and
output data are all 12-bits and in two’s
complement format.
The horizontal filter is designed to take
advantage of symmetric coefficient sets.
When symmetric coefficient sets are
used, the horizontal filter can be
configured as a 16-tap FIR filter. When
asymmetric coefficient sets are used, it
can be configured as an 8-tap FIR filter.
The vertical filter is an 8-tap FIR filter
with all required line buffers contained
on-chip. The line buffers can store
video lines with lengths from 4 to 3076
pixels.
Horizontal filter Interleave/Decima-
tion Registers (I/D Registers) and the
vertical filter line buffers allow
interleaved data to be fed directly into
the device and filtered without
separating the data into individual
data streams. The horizontal filter
can handle a maximum of sixteen
data sets interleaved together. The
vertical filter can handle interleaved
video lines which contain 3076 or less
data values. The I/D Registers and
horizontal accumulator facilitate
using decimation to increase the
number of filter taps in the horizontal
filter. Decimation of up to 16:1 is
supported.
The device has on-chip storage for 256
horizontal coefficient sets and 256
vertical coefficient sets. Each filter’s
coefficients are loaded independently
of each other allowing one filter’s
coefficients to be updated without
affecting the other filter’s coefficients.
In addition, a horizontal or vertical
coefficient set can be updated inde-
pendently from the other coefficient
sets in the same filter.
FEATURES
u
83 MHz Data Rate
u
12-bit Data and Coefficients
u
On-board Memory for 256 Horizontal
and Vertical Coefficient Sets
u
LF Interface
TM
Allows All 512
Coefficient Sets to be Updated
Within Vertical Blanking
u
Selectable 12-bit Data Output with
User-Defined Rounding and
Limiting
u
Seven 3K x 12-bit, Programmable
Two-Mode Line Buffers
u
16 Horizontal Filter Taps
u
8 Vertical Filter Taps
u
Two Operating Modes: Dimension-
ally Separate and Orthogonal
u
Supports Interleaved Data Streams
u
Horizontal Filter Supports Decima-
tion up to 16:1 for Increasing
Number of Filter Taps
u
3.3 Volt Power Supply
u
5 Volt Tolerant I/O
u
144 Lead PQFP
LF3310 B
LOCK
D
IAGRAM
12
DIN
11-0
16-TAP HORIZONTAL FILTER
256 COEFFICIENT SET STORAGE
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
8-TAP VERTICAL FILTER
256 COEFFICIENT SET STORAGE
12
3K LINE BUFFER
DOUT
11-0
Video Imaging Products
1
11/08/2001-LDS.3310-H
LOGIC [ LOGIC DEVICES INCORPORATED ]
