ADV7191 Analog Devices, ADV7191 Datasheet - Page 11

• Manufacturer Part Number: ADV7191
• Description: Video Encoder with Six 10-Bit DACs and Video Encoder with Six DAC Outputs
• Manufacturer: Analog Devices

GENERAL DESCRIPTION
The ADV7190/ADV7191 is an integrated Digital Video Encoder
that converts digital CCIR-601/656 4:2:2 8-bit or 16-bit com-
ponent video data into a standard analog baseband television
signal compatible with worldwide standards.
CLKOUT
HSYNC
VSYNC
BLANK
TTXRQ
RESET
CLKIN
TTX
P15
P0
10
PAL_NTSC
MATRIX
10 10
DEMUX
YCrCb
YUV
VIDEO TIMING
TO
GENERATOR
Y
U
V
10
10
10
VSO/CLAMP
INSERTION
TELETEXT
BLOCK
CORRECTION
PLL
GAMMA
DNR
AND
CSO_HSO
Y
U
V
ADV7190/ADV7191
10
10
10
INTERPOLATOR
INTERPOLATOR
CLOSED CAPTIONING
BRIGHTNESS
SATURATION
ADD BURST
ADD SYNC
CONTROL
CONTROL
AND
AND
AND
AND
CGMS/WSS
CONTROL
AND
PROGRAMMABLE
PROGRAMMABLE
SCRESET/RTC/TR
LUMA FILTER
SHARPNESS
REAL-TIME
CONTROL
CHROMA
CIRCUIT
FILTER
FILTER
AND
SCL
I
2
C MPU PORT
Six DACs are available on the ADV7190/ADV7191, each of which
is capable of providing 4.33 mA of current. In addition to the
composite output signal there is the facility to output S-Video
(Y/C Video), RGB Video and YUV Video. All YUV formats
(Betacam, MII and (SMPTE/EBU N10) are supported.
Digital Noise Reduction allows improved picture quality in remov-
ing low amplitude, high frequency noise. The block diagram below
shows the DNR functionality in the two modes available.
Y DATA
Y DATA
SDA
INPUT
INPUT
ALSB
NOISE SIGNAL PATH
NOISE SIGNAL PATH
HUE CONTROL
MODULATOR
DNR SHARPNESS MODE
SIN/COS
MAIN SIGNAL PATH
MAIN SIGNAL PATH
BLOCK
YUV-TO-RGB
YUV LEVEL
CONTROL
AND
DDS
INPUT FILTER
INPUT FILTER
MATRIX
BLOCK
AND
BLOCK
BLOCK
DNR MODE
BLOCK SIZE CONTROL
BORDER AREA
BLOCK OFFSET
BLOCK SIZE CONTROL
BORDER AREA
BLOCK OFFSET
DNR CONTROL
DNR CONTROL
M
U
L
T
P
L
E
X
E
R
I
FILTER OUTPUT
FILTER OUTPUT
<THRESHOLD?
>THRESHOLD?
FILTER OUTPUT>
FILTER OUTPUT<
ADV7190/ADV7191
THRESHOLD
THRESHOLD
N
E
R
P
O
A
O
R
T
L
T
I
CORING GAIN DATA
CORING GAIN BORDER
CORING GAIN DATA
CORING GAIN BORDER
N
R
O
A
O
R
T
E
P
L
T
I
SUBTRACT SIGNAL IN THRESHOLD
RANGE FROM ORIGINAL SIGNAL
ADD SIGNAL ABOVE THRESHOLD
RANGE TO ORIGINAL SIGNAL
CONTROL
CONTROL
10-BIT
10-BIT
10-BIT
10-BIT
10-BIT
10-BIT
BLOCK
BLOCK
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
GAIN
GAIN
DAC A
DAC B
DAC C
V
R
COMP2
DAC D
DAC F
DAC E
R
COMP1
REF
SET2
SET1
DNR OUT
DNR OUT