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PDF GF9103 Data sheet ( Hoja de datos )
| Número de pieza | GF9103 | |
| Descripción | Over-Sampling Color Space Converter | |
| Fabricantes | Gennum | |
| Logotipo |  |
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MultiGEN ™ GF9103 Over-Sampling
Color Space Converter for Video
Monitoring
DATA SHEET
FEATURES
• 4:2:2 to over-sampled RGB or YCBCR conversion in a
single device
• single 10 bit 4:2:2 input
• internal 4:2:2 de-multiplexer
• 4:2:2 to 8:8:8 interpolation filters
• internal YCBCR to RGB color space conversion
• optional YCBCR (8:8:8) output mode
• setup insertion in Luminance channel under user
control
• user selectable digital SIN X/X correction
• rounding to 10/8 bit resolution per output channel
• 40 MHz maximum clock rate
• single +5 V power supply
APPLICATIONS
• Over-Sampling 4:2:2 to Analog RGB Conversions for
video monitoring
• Over-Sampling 4:2:2 to Analog YCBCR Conversions for
video monitoring
ORDERING INFORMATION
PART NUMBER
PACKAGE
TEMPERATURE RANGE
GF9103-CPS
68 pin PLCC
0° to 70° C
GF9103-CTS
68 pin PLCC Tape
0° to 70° C
DEVICE DESCRIPTION
The GF9103 is specifically designed to simplify conversions
from 4:2:2 component digital video to analog RGB or
analog YCBCR component video. The GF9103 simplifies
this process by performing 4:2:2 to 8:8:8 interpolation,
digital color space conversion and digital SIN X/X
correction in a single device. Immediately following the
GF9103, three over-sampled channels of RGB or YCBCR
data may be passed through Digital to Analog converters
and simplified analog reconstruction filters.
The GF9103 accepts a single 10 bit stream of 4:2:2 data
and internally de-multiplexes it into three 10 bit channels of
YCBCR data. The YCBCR data is then passed through
three linear phase FIR filters that over-sample the Y data by
a factor of 2 and the CB and CR data by a factor of 4.
While operating in an over-sampled RGB output mode, the
interpolated YCBCR data is passed through the internal
color space converter to convert the YCBCR data to RGB
data according to CCIR-601. Alternatively, the color space
converter may be bypassed to obtain over-sampled YCBCR
(8:8:8) output data. While operating in YCBCR output mode,
setup may be dynamically inserted into the Luminance
channel.
Prior to output rounding, over-sampled YCBCR or RGB data
may be corrected for SIN X/X characteristics of D/A
conversion. Output data may be rounded to 10 or 8 bit
resolution per channel. CB and CR may be presented as
signed or unsigned data.
The GF9103 is packaged in a 68 pin PLCC package,
operates with a single +5 V power supply and typically
consumes only 85 mA of current when operated at 27 MHz.
SETUP
SELECT_MATRIX
BYPASS
CONVERT
OE
MULTIPLEXED 10
4:2:2 DATA
STREAM IN
CLK
SYNC
Y
4:2:2 CB
DEMUX
CR
Y
X2
SETUP
Y
X4 CB
CB
CR
X4
CR
Y/G
YCBCR
TO
RGB
MATRIX
CB/B
CR/R
Y/G
SIN X/X
CB/B
SIN X/X
CR/R
SIN X/X
CLIP & ROUND
Y/G
CB/B
CLIP & ROUND
CB/B
2's COMP
CR/R CR/R
CLIP & ROUND
2's COMP
FUNCTIONAL BLOCK DIAGRAM
10
Y/G
10
CB/B
10
CR/R
Revision Date: August 1997
Document No. 521 - 33 - 04
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: [email protected]
www.gennum.com
1 page  
CONTROL SIGNAL/OPERATING MODE SUMMARY
SYNC
The SYNC control signal provides synchronization for the internal 4:2:2 de-multiplexer. SYNC should be held high on clock
period N and low on clock period N+1 when the first CB sample is presented to the SI9..0 inputs. SYNC may be held low until
re-synchronization is desired or may be toggled at every occurrence of a CB sample.
SELECT_MATRIX AND SETUP
SELECT_MATRIX and SETUP select the color space conversion and offset insertions which the GF9103 is to perform. The
following chart presents the available color space conversions and the corresponding states of the SELECT_MATRIX and
SETUP control pins. SETUP is a dynamic pin that may be modified every clock cycle.
SELECT_MATRIX
0
0
1
SETUP
0
1
X
DESCRIPTION
Selects output to be over-sampled YCBCR with no setup in Y channel.
Selects output to be over-sampled YCBCR with a scaling factor of
+947/1024 and an offset of +71 (decimal) applied to the Y channel.
Selects output to be over-sampled RGB with no setup.
SIN X/X CORRECTION
BYPASS
DESCRIPTION
1 SIN X/X correction enabled on all output data channels. Latency through the device is 24 clock cycles.
0 SIN X/X correction disabled. Latency through the device is 22 clock cycles.
OUTPUT ROUNDING
RND10/8
DESCRIPTION
1 Output data rounded to 10 bit resolution per channel.
0 Output data rounded to 8 bit resolution per channel.
TWO’S COMPLEMENT OUTPUT CONVERSION
CONVERT SELECT_MATRIX
DESCRIPTION
1 0 SOB9..0 and SOC9..0 output signed (two's complement) CB and CR data.
0 0 SOB9..0 and SOC9..0 output unsigned (offset binary) CB and CR data.
X 1 SOB9..0 and SOC9..0 output unsigned B and R data.
OUTPUT ENABLE
OE
0 All output data ports are enabled.
1 All output data ports are in high impedance state.
DESCRIPTION
5 521 - 33 - 04
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet GF9103.PDF ] | |
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