
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: info@gennum.com
www.gennum.com
Revision Date:  August 1997
Document No.  521 - 33 - 04
DATA SHEET
FEATURES
 4:2:2 to over-sampled RGB or YC
B
C
R
 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 YC
B
CR to RG
B
 color space conversion 
 optional YC
B
C
R
 (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
DEVICE DESCRIPTION
The GF9103 is specifically designed to simplify conversions
from 4:2:2 component digital video to analog RGB or
analog YC
B
C
R
 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 YC
B
C
R
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
YC
B
C
R
 data.   The YC
B
C
R
 data is then passed through
three linear phase FIR filters that over-sample the Y data by
a factor of 2 and the C
B
and C
R
 data by a factor of 4. 
While operating in an over-sampled RGB output mode, the
interpolated YC
B
C
R
 data is passed through the internal
color space converter to convert the YC
B
C
R
 data to RGB
data according to CCIR-601.  Alternatively, the color space
converter may be bypassed to obtain over-sampled YC
B
C
R
(8:8:8) output data.  While operating in YC
B
C
R
 output mode,
setup may be dynamically inserted into the Luminance
channel.
Prior to output rounding, over-sampled YC
B
C
R
 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. C
B
and C
R
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.
FUNCTIONAL BLOCK DIAGRAM
 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
10
10  
10
CLIP & ROUND 
CLIP & ROUND
CLIP & ROUND
SELECT_MATRIX
SETUP
SETUP
SIN X/X 
SIN X/X 
SIN X/X 
Y
MULTIPLEXED
4:2:2 DATA
STREAM IN
YCBCR
TO
RGB
MATRIX
BYPASS
CB
4:2:2
DEMUX 
SYNC
CLK
OE
CR
Y
X2
X4
X4
CB
CR
CR
Y
CB
Y/G        
CR/R
CB/B
Y/G        
CB/B
CR/R
Y/G        
CB/B
CR/R
Y/G        
CB/B
CR/R
CB/B
CR/R
2's COMP  
CONVERT
2's COMP     
10
Multi
GEN
 
 GF9103 Over-Sampling
Color Space Converter for Video
Monitoring