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參數(shù)資料
| 型號(hào)： | LF3338QC12 |
| 廠商： | LOGIC DEVICES INC |
| 元件分類： | 數(shù)字信號(hào)處理外設(shè) |
| 英文描述： | 8-Bit Vertical Digital Image Filter |
| 中文描述： | 8-BIT, DSP-DIGITAL FILTER, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大?。?/td> | 303K |
| 代理商： | LF3338QC12 |
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DEVICES INCORPORATED
Video Imaging Products
1
LF3338
8-Bit Vertical Digital Image Filter
8-Bit Vertical Digital Image Filter
04/06/1999–LDS.3338-B
K
83 MHz Data Rate
K
8-bit Data and 12-bit Coefficients
K
Supports Interleaved Data Streams
K
Cascadable for More Filter Taps
K
Seven 3K x 8-bit, Dynamic Program-
mable Two-Mode Line Buffers
K
On-board Memory for 256
Coefficient Sets
K
LF Interface
TM
Allows All 256
Coefficient Sets to be Updated
Within Vertical Blanking
K
Selectable 16-bit Data Output with
User-Defined Rounding and
Limiting
K
Separate Input Port for Odd and
Even Field Filtering
K
8 Filter Taps
K
3.3 Volt Power Supply
K
5 Volt Tolerant I/O
K
Purchase Description
FEATURES
DESCRIPTION
The
LF3338
is a lower cost version of
the 12-bit LF3330 and is suited for
multimedia and special effects systems,
projectors, plasma display panels, scan
converters, set-top boxes, and other
consumer applications.
This device filters digital images in
the vertical dimension at real-time
video rates. Input data is 8 bits and
coefficient data is 12 bits and both are
in two’s complement format. The
output is also in two’s complement
format and may be rounded to 16 bits.
The 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. Multiple LF3338s can be
cascaded together to create larger
vertical filters.
Due to the length of the line buffers,
interleaved data can be fed directly
into the device and filtered without
separating the data into individual
data streams. The number of inter-
leaved data sets that the device can
handle is limited only by the length of
the on-chip line buffers. If the inter-
leaved video line has 3076 data values
or less, the filter can handle it.
The LF3338 contains enough on-board
memory to store 256 coefficient sets.
The LF Interface
TM
allows all 256
coefficient sets to be updated within
vertical blanking.
Selectable 16-bit data output with
user-defined rounding and limiting
minimizes the constraints put on
coefficient sets for various filter
implementations.
LF3338 B
LOCK
D
IAGRAM
DEVICES INCORPORATED
DIN
7-0
2
3K LINE BUFFER
8
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
3K LINE BUFFER
ROUND
SELECT
LIMIT
CIRCUITRY
OED
16
DOUT
15-0
8
COUT
7-0
32
VB
7-0
8
OEC
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