GRASS VALLEY 8990ARC - User manual

8990ARC
SD ASPECT RATIO CONVERTER MODULE
Instruction Manual
SOFTWARE VERSION 3.0.0
071803601
DECEMBER 2004

2 8990ARC Instruction Manual
Contacting Grass Valley
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8990ARC Instruction Manual 3
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Frame Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Module Placement in the 8900 Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Loop-through Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
General Purpose Interface (GPI) Connections. . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operation Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Output Format Control Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Output Aspect Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Vertical Resizing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Output Conversion Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Video and VBI Line Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Video Index Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Modified Video Index Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Custom WSS/Video Index Coding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wide Screen Signaling (WSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
WSS Line Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Standard Wide Screen Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Modified Wide Screen Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Custom Wide Screen Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
GPI Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Configuration Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Newton Pan/Tilt Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Onboard Configuration Switches and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Local On-board Module Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Remote Configuration and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8900NET Module Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Newton Control Panel Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8990ARC Links and Web Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Status Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Frame Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SNMP Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Input and Ancillary Data Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4 8990ARC Instruction Manual
Contents
Active Picture Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
H & V Re-sizing Algorithm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Vertical Resize Filtering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Video Index Information Coding Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8990ARC Instruction Manual 5
Preface
About This Manual
This manual describes the features of a specific module of the Gecko 8900
Signal Processing System. As part of this module family, it is subject to
Safety and Regulatory Compliance described in the Gecko 8900 Series
frame and power supply documentation (see the Gecko 8900 Frames Instruc-
tion Manual ).

6 8990ARC Instruction Manual
Preface

8990ARC Instruction Manual 7
8990ARC SD Aspect Ratio
Converter
Introduction
The 8990ARC converts between standard (4:3) and widescreen (16:9) SD
video formats. Flexible aspect ratio control is provided on the module’s
front panel and through remote control using the 8900 web browser graph-
ical user interface (GUI) and the Newton Control Panel.
The 8990ARC is compact and fits in the 8900 frame which holds up to 10
modules in 2 RU. It supports 270 Mb serial digital video with outputs ref-
erenced from the input signal.
Key features include:
• 270 Mb component serial digital input and output,
•Module is hot-swappable,
•Module settings are stored in non-volatile memory,
•Automatic 525/625 line selection based on video input,
• Passes horizontal ancillary data (HANC),
• Passes or blanks vertical interval ancillary data (VANC),
•Standard, modified, and custom Video Index Coding and Wide Screen
Signaling (WSS) with selectable WSS line,
•GPI (general purpose interface) input can recall one of four
user-defined preset settings,
•Selection of top and bottom one, two, or three active video lines as data
lines, and
•Remote control and monitoring through the 8900 frame ethernet I/F
and Newton Control Panel (with 8900NET module running software
version 3.2.0 and later).

8 8990ARC Instruction Manual
Installation
Installation
Installation of the 8990ARC module is a process of:
• Placing the module in the selected frame slot, and
•Cabling and terminating signal ports.
The 8990ARC module can be plugged in and removed from an 8900 Series
frame with power on. When power is applied to the module, LED indica-
tors reflect the initialization process (see Power Up on page 12).
Frame Capacity
The maximum number of 8900 modules allowed in a frame is determined
by frame cooling capacity. Table 1 provides the power capacity, cooling
capacity, and maximum module count for the 8990ARC in each frame type.
Note Module capacity figures assume no other modules are in the frame.
If the maximum number of modules a frame can handle is less than ten,
provide as much space between the modules as possible.
Module Placement in the 8900 Frame
There are ten cell locations in the frame to accommodate either analog or
digital modules. These are the left ten locations. Refer to Figure 1 on page 9.
The two cells on the right are allocated for the power supplies. For addi-
tional information concerning the Power Supply module, refer to the 8900
Power Supply manual.
The third cell from the right is allocated for the Frame Monitor or Network
Interface module. These modules provide health bus monitoring and
control options.
Table 1. Power, Cooling, and Module Capacity of 8900 Frames
Capacity Calculated 8900T2
Frame 8900T2-F Frame 8900TX Frame 8900TF Frame 8900TFN Frame
Power (W) 60 60 100 100 100
Recommended Module Cooling (W) 30 60 30 90 90
8990ARC Modules 6 10 6 10 10

8990ARC Instruction Manual 9
Installation
Figure 1. 8900 Series Frame
8900 modules are interchangeable within the module cells. There are 10
BNC connectors in each cell’s I/O group. The functional assignment of
each connector in a group is determined by the module that is placed in
that cell. The maximum number of modules an 8900 frame can accept is ten.
Figure 2 illustrates the rear connector plate for an 8900 Series frame.
Figure 2. 8900 Series Frame Rear Connectors
To install a module in the frame:
1.
Insert the module, connector end first, with the component side of the
module facing to the right and the ejector tab to the top.
2.
Verify that the module connector seats properly against the backplane.
3.
Press the ejector tab in to seat the module in place.
Frame Controller or
8900NET Network
Interface Module
Any Gecko/8900 Module Power
Supplies
8036_04
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
1
J2
J4
J6
J8
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
3
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
5
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
2
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
7
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
9
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
4
J2
J4
J6
J8
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
6
J2
J4
J6
J8
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
8
J2
J4
J6
J8
J1 J2
J3 J4
J5 J6
J7 J8
J9 J10
IN
10
O
U
T
O
U
T
O
U
T
O
U
T
O
U
T
O
U
T
O
U
T
O
U
T
O
U
T
O
U
T
8036-03

10 8990ARC Instruction Manual
Installation
Cabling
Note At the back of this manual (hard-copy only) are die-cut overlay cards that can
be placed over the rear connector BNCs to identify the specific 8990ARC con-
nector functions.
Loop-through Input
Connect an input source to one of the loop-through input connectors, J9 or
J10 (see Figure 3). The 8990ARC input accepts SMPTE 259M-C or EBU tech
3267 8- or 10-bit component serial digital video. Terminate the unused con-
nector into 75
Ω if the signal is not looped to other equipment.
Figure 3. 8990ARC Input, Output and GPI Connectors
Outputs
The 8990ARC provides four 75 Ω component video output BNCs (J1
through J4).
The destination equipment should have a 75
Ω input impedance or loop
through inputs that are terminated into 75
Ω .
General Purpose Interface (GPI) Connections
BNCs J7 and J8 accept GPI control signals that select one of four
user-defined preset settings that are stored using the onboard configura-
tion controls or the remote GUI controls. The GPI can be used with a
user-provided panel with four latching momentary switches and appro-
priate resistors. No tally is provided from the module.
J2
J4
J6
J8
J9 J10
IN
GPI
DAx
O
U
T
J3
J5
J7
J2J1
J4
J6
J8
8036-02
Loop-through
SDI 270 Mbps Input
Output
Output
Not used
Output
Output
Not used
GPI

8990ARC Instruction Manual 11
Installation
GPI Control
The GPI control input at BNCs J7 or J8 (not both) on the rear panel is a
loop-through input to an A/D converter and a 1.21 K
Ω resistor to +5 V.
When the module’s GPI function is enabled, the 8990ARC software will
recognize a GPI input voltage level to select one of four stored user-defined
modes. Looping the input to additional modules allows a single GPI signal
to set them all (up to 10 modules).
The GPI input is created by the application of a parallel resistor between
the coax center and common ground that results in a voltage lower than
+5 V to the A/D converter.
The following voltages (all ±0.4 V) will select the GPI register indicated:
• 1.25 V = GPI 1
• 2.08 V = GPI 2
• 2.92 V = GPI 3
• 3.75 V = GPI 4
The resistors required for these voltages are shown in Figure 4.
Figure 4. Typical GPI Input Circuit Diagram
1
2
3
4
402 Ω
Open
845 Ω
1690 Ω
3570 Ω
Connects to
J7 or J8
8036_07
Note:
Resistor tolerance = 1%
Only one GPI input can be used

12 8990ARC Instruction Manual
Power Up
Power Up
The various front LED indicators and configuration switches are illustrated
in Figure 5. Upon power-up, the green PWR LED should light and the
yellow CONF LED should illuminate for the duration of module initializa-
tion.
Operation Indicator LEDs
With factory default configuration and a valid input signal connected, the
green PWR LED, and one of the green signal standard LEDs (525 or 625)
should illuminate (refer to Table 2 on page 13 to see the possible operating
indicator combinations).
Video input presence is indicated by the appropriate 525 or 625 LED (indi-
cating a 525-line or 625-line input signal has been detected). The appro-
priate Mode LED is on.
Figure 5. LEDs and Configuration Switches
8036_05r1
Mode 1 (yellow)
Mode 2 (yellow)
Mode 3 (yellow)
Mode 4 (yellow)
FAULT (red)
COMM (yellow)
CONF (yellow)
PWR (green)
525 (green)
625 (green)
16:9 (yellow)
4:3 (yellow)
16-position
Rotary switch
Momentary paddle switch

8990ARC Instruction Manual 13
Power Up
A red FAULT LED indicates an error situation and, with the previously
described LEDs, can indicate the operational conditions presented in
Table 2.
Table 2. Indicator LEDs and Conditions Indicated
LED Indication Condition
FAULT
(red)
Off Normal operation
On continuously Module has detected internal fault
Short flash EDH errors will cause short flashes. In most applications a few, infrequent EDH errors will not be of consequence. Continuous EDH errors result in obvious output
signal degradation.
COMM
(yellow)
Off No activity on frame communication bus
Long flash Location Command received by the module from a remote control system
Short flash Activity present on the frame communication bus
CONF
(yellow)
Off Module is in normal operating mode
On continuously Module is initializing, changing operating modes or updating firmware
Flashing Indicates rate of change of paddle switch controlled analog setting. The longer the
switch is held, the more the flashing rate and the change-of-setting rate increases
PWR
(green)
Off No power to module or module’s DC/DC converter failed
On continuously Normal operation, module is powered
525
(green)
Off Input signal is 625 standard or no signal is present
On continuously Input signal is 525 standard and present
625
(green)
Off Input signal is 525 standard or no signal is present
On continuously Input signal is 625 standard and present
16:9
(yellow)
Off 4:3 mode is selected
On 16:9 mode is selected
4:3
(yellow)
Off 16:9 mode is selected
On 4:3 mode is selected
Mode 1
(yellow)
Off Another mode is selected
On Mode 1 is selected
Mode 2
(yellow)
Off Another mode is selected
On Mode 2 is selected
Mode 3
(yellow)
On Another mode is selected
Off Mode 3 is selected
On
Mode 4
(yellow)
Another mode is selected
Off Mode 4 is selected

14 8990ARC Instruction Manual
Configuration
Configuration
The 8990ARC can be configured locally using onboard switches or
remotely using the 8900NET GUI interface or the Newton Control Panel. A
summary of all functions available with each control type along with the
ranges and default values for each parameter is given in Table 8 on page 26.
The configuration of the 8990ARC determines:
•Output aspect ratio (16:9/4:3),
•Display conversion modes: (see Output Conversion Modes on page 17),
• Bypass (no conversion),
• Pillarbox for 16:9 output or Letterbox for 4:3 output,
• Full Width for 16:9 output or Full Height for 4:3 output,
• 14:9 output,
•High or Low vertical resizing filtering – for vertical black/white or
severe chroma transitions,
•Position of converted outputs on the monitor (Tilt for vertical and Pan
for horizontal positioning),
• Blanking or passing of vertical ancillary data (VANC),
•Number of active video lines selected as data lines (None, 1, 2, or 3),
• Enable one of three Video Index Control modes allowing control from
data within the video input signal,
• Enable one of three Wide Screen Signaling (WSS) Control modes
allowing control from video source data and selection of WSS line (lines
13-27),
• Enable/disable of GPI control,
• Save/Recall of user-defined configurations for each of four GPI and
one non-GPI controlled memory register, and
•Recall of factory default settings.
Output Format Control Summary
The output format from the module can be resized by selecting an aspect
ratio, a conversion mode, and setting vertical resizing.
Output Aspect Ratio
The output aspect ratio can be selected with the web page, Newton control
panel, local controls, or though the GPI registers as either 16:9 or 4:3.
Figure 6 on page 15 and Figure 7 on page 16 illustrate the output conver-
sions for both 4:3 and 16:9 formats.

8990ARC Instruction Manual 15
Configuration
Figure 6. 4:3 Picture Input to 16:9 Conversion Options
Complete picture with horizontal
stretch
Mode 1, Bypass
Complete picture with no distortion;
Position left, center, or right (Pan)
Mode 2, Pillarbox
Top and bottom cropping;
Position top, center, or bottom (Tilt)
= lost picture
Mode 3, Full Width
Shift horizontally
Shift horizontally
Shift
vertically
Top and bottom cropping;
Position left, center, or right (Pan)
= lost picture
Mode 4, 14:9
CONVERSION
INPUT - 4:3

16 8990ARC Instruction Manual
Configuration
Figure 7. 16:9 Picture Input to 4:3 Conversion Options
Complete picture in Letterbox
format with blanking at top and bottom
Position top, center, or bottom (Tilt)
Mode 2, Letterbox
Complete picture with vertical
distortion (objects appear taller)
Mode 1, Bypass
Shift
vertically
Shift
vertically
Shift horizontally
Horizontal cropping
Position left, center, or right (Pan)
Mode 3, Full Height
= lost picture
Vertical blanking
Horizontal cropping
Position top, center, or bottom (Tilt)
Mode 4, 14:9
= lost picture
INPUT - 16:9
CONVERSION
8036_09

8990ARC Instruction Manual 17
Configuration
Vertical Resizing
The V Process BW control adjusts vertical sizing to correct filter ringing
above and below the edge on video sources with high contrast or chroma
saturated horizontal edges. Select
Low
to remove ringing in lines with ver-
tical black/white or severe chroma transitions.
Output Conversion Modes
One of four output conversion modes for either 4:3 or 16:9 output aspect
ratio format can be selected with user controls as follows:
• For 4:3 format, 1 = Bypass, 2 = Letterbox, 3 = Full Height, 4 = 14:9, or
• For 16:9 format, 1 = Bypass, 2 = Pillarbox, 3 = Full Width, 4 = 14:9.
Examples of the conversion modes are shown in Figure 6 on page 15 and
Figure 7 on page 16 for both 4:3 and 16:9 formats.
Control of the desired video output conversion mode can be from four
sources:
•Web page, Newton Control Panel, or local control,
•GPI triggering of pre-programmed registers,
•Video Index Coding data on video input signal, or
•Wide Screen Signaling (WSS) on input signal.
When set for Remote/Local operation (Figure 9 on page 29), the web page,
Newton Control Panel and local control settings are always enabled and
always valid. GPI controls are based on these settings, stored in GPI regis-
ters, and triggered by the web page, local controls, or an customer-supplied
external device. Video Index Coding and WSS may or may not be valid
depending on the presence of information on the input signal. The status
of both WSS and Video Index Coding is reported at all times for the input
signal on the Settings web page in read-only form ( Settings Web Page on
page 36).
Table 3 shows the output formatting control options and the resultant
output processing for various input signals and controls enabled.
Table 3. Input Combinations and Resulting Outputs
WSS Input & Enable Video Index
Input & Enable GPI Input & Enable User Selected
Control Resulting Output Signal Processing Control
Valid and enabled Any condition Any condition Mode, format WSS control
None or disabled Valid and enabled Any condition Mode, format Video Index control
None or disabled None or disabled Valid and enabled Mode, format GPI control
None or disabled None or disabled None or disabled Mode, format User selected processing

18 8990ARC Instruction Manual
Configuration
The output will change according to the last valid command from the
highest priority enabled control. For example, consider a case where the
Video Index is enabled and its input is invalid. The user sets the conversion
mode with the control panel to Bypass which passes the Video Index signal
through to the output. The Video Index input changes to valid and sets the
conversion mode to Letterbox. The Video Index then becomes invalid
again.
The output will remain at Letterbox until another valid enabled control
changes the conversion mode. It will not revert back to the setting set with
the control panel.
Tilt/Pan Control
Tilt and pan controls for left and right, centering, and top and bottom posi-
tioning are provided depending on the Conversion mode selected.
Video and VBI Line Handling
The module handles lines in the video input differently depending on
whether the line is an active video or a vertical interval line.
Vertical interval lines (lines 1-20/264-283 in 525 or lines 624-23/311-336 in
625) are either passed to the output unchanged or blanked by the VBI
Bypass circuit. This selection is made with the VANC Data control.
Active video lines (lines 21-263/284-525 in 525 or lines 24-310/337-623 in
625) are processed through a scaling circuit. Depending on the mode of the
module and the line number, they are either passed to the output, replaced
with a scaled version of part of the input active video, or replaced with
black fill.
If, for example, the scaling circuit is magnifying the video vertically, all
active lines are replaced with scaled lines and the portion of the scaled
video that doesn’t fit in to the active space is discarded.
If the scaling circuit is reducing the video vertically, all of the scaled video
is displayed on the output and active lines that are not covered by the
scaled video are blanked.
When information such as closed captioning data is present on one of the
first three active video lines, (lines 21/284, 22/285, and 23/286 in 525 or
lines 24/337, 25/338, and 26/339 in 625), these lines can be designated as
data lines and will be treated as part of the vertical interval passing the data
to the output when the VANC Data control is set to
Pass .

8990ARC Instruction Manual 19
Configuration
This is done using the Data Lines control as follows:
•When the Data Lines control is set to 1, the first active line of video is
treated as part of the vertical interval and passed to the output through
the VBI Bypass circuit maintaining any data it contains.
In the active video scaling circuit, this first active video line is blanked
before the active video is processed in the scaling circuit so that no
non-video information will appear on the video output. The last active
video line is also blanked to maintain symmetry on the video output.
•When the Data lines control is set to 2, the first 2 active lines of video
are treated as part of the vertical interval in the VBI Bypass circuit.
These first 2 lines of active video are blanked before the active video is
processed in the scaling circuit. The last two lines of active video are
also blanked before the scaling circuit to maintain symmetry on the
video output.
•When set to 3, the first three lines of active video are treated as vertical
interval lines in the VBI Bypass circuit. These first 3 lines of active video
are blanked before the active video is processed in the scaling circuit.
The last three lines of active video are also blanked before the scaling
circuit to maintain symmetry on the video output.
For the exact line number of the lines that are blanked with the different
Data Lines control settings for 525 and 625 line rates, refer to the parameter
for Active lines blanked before processing by scaling circuit on page 47 in the
Specifications section.

20 8990ARC Instruction Manual
Configuration
Video Index Coding
In Video Index Coding, video source data can be inserted in the video input
signal on lines 11 and 324 for 625, on lines 14 and 277 for 525, to identify the
signal line standard and aspect ratio. If this information is present and the
8990ARC Video Index Control function is enabled in one of three Video
Index Coding modes and the module output mode matches the input, the
module will pass the signal as is. If the output mode does not match, the
module will use the selected conversion mode (see Output Conversion
Modes on page 17). The Video Index coding is passed through to the
8990ARC output unaltered.
This module supports three modes of Video Index Coding: Standard, Mod-
ified, and Custom.
Standard Video Index Coding
Support for Standard Video Index Coding is based on the SMPTE RP-186
standard. In Standard mode, the three least significant bits (b0, b1, and b2)
of the first byte (octet) contain the aspect ratio information of the video.
Refer to Table 4 for the definition and how this information is interpreted
by the module. Note that the module ignores the line rate.
Table 4. Standard Video Index Coding
AID Value (b2, b1, b0) Definition (AID) Selected Output Format Resulting Conversion Mode
000 No information None Mode 1:Bypass
001 525/59.94 4:3 4x3 Mode 1:Bypass
16x9 Mode 2: Pillarbox
010 625/50 4:3 4x3 Mode 1:Bypass
16x9 Mode 2: Pillarbox
011 Reserved None Mode 1:Bypass
100 Reserved None Mode 1:Bypass
101 525/59.94 16:9 4x3 Mode 2: Letterbox
16x9 Mode 1: Bypass
110 625/50 16:9 4x3 Mode 2: Letterbox
16x9 Mode 1: Bypass
111 Reserved None Mode 1:Bypass