Grass Valley 8990ARC v.3.0 - Manual (Page 24)

24 8990ARC Instruction Manual
Configuration
Wide Screen Signaling (WSS)
Wide Screen Signaling (WSS) for 625 systems is also supported on this
module. One of three WSS control modes can be selected: Standard, Modi-
fied, and Custom.
If WSS is enabled, the 8990ARC output conversion mode will be controlled
according to this input data. If Video Index Control is also enabled, the WSS
control, when present, will take precedence as explained in
Table 3 on
page 17 . WSS coding is passed through to the 8990ARC output unaltered.
WSS Line Selection
According to the industry standard WSS protocol, in 625-line systems the
video input signal can contain video source data on line 23. This module
has been modified to allow the line containing source data to be selected as
any line from 13-27. The module will only search for WSS data on the line
selected by the WSS control on the web page, control panel, or local control.
Standard Wide Screen Signaling
Support for standard WSS mode is based on the EN 300 294 V1.3.2
(1998-04) standard.
Table 7 shows the setting for the module based on the
output mode selected and the contents of the Group 1 data in the WSS
signal.
Table 7. Standard Wide Screen Signaling
Group 1 Value
(b2, b1, b0)
Aspect Ratio
Label
Position
Selected Output
Format
Resulting Conversion
Mode
Resulting
Tilt/Pan
000 4:3 N/A
4x3 Mode 1: Bypass Center
16x9 Mode 2: Pillarbox Center
001 14:9 Center
4x3 Mode 1: Bypass Center
16x9 Mode 4: 14x9 Center
010 14:9 Top
4x3 Mode 1: Bypass Center
16x9 Mode 4: 14x9 Top
011 16:9 Center
4x3 Mode 1: Bypass Center
16x9 Mode 3: Full Width Center
100 16:9 Top
4x3 Mode 1: Bypass Center
16x9 Mode 3: Full Width Top
101 > 16:9 Center
4x3 Mode 1: Bypass Center
16x9 Mode 3: Full Width Center
110 14:9 Center
4x3 Mode 1: Bypass Center
16x9 Mode 4: 14x9 Center
111 16:9 N/A
4x3 Mode 2: Letterbox Center
16x9 Mode 1: Bypass Center