GF9103 Datasheet, PDF (1/9 Pages) Gennum Corporation – Over-Sampling Color Space Converter for Video Monitoring

MultiGEN ^™ GF9103 Over-Sampling
Color Space Converter for Video
Monitoring
DATA SHEET
FEATURES
• 4:2:2 to over-sampled RGB or YC_BC_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_BCR to RG_B color space conversion
• optional YC_BC_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
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 YC_BC_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_BC_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_BC_R data. The YC_BC_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_BC_R data is passed through the internal
color space converter to convert the YC_BC_R data to RGB
data according to CCIR-601. Alternatively, the color space
converter may be bypassed to obtain over-sampled YC_BC_R
(8:8:8) output data. While operating in YC_BC_R output mode,
setup may be dynamically inserted into the Luminance
channel.
Prior to output rounding, over-sampled YC_BC_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.
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
Y
SETUP
X4 ^CB
CB
CR
CR
X4
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
Y/G
CLIP & ROUND
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
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