Crystal Vision
Aspect Ratio Correction
to the top and bottom or both sides of the picture. There will be some loss of picture.
Centre cut will show the central 75% of the 16:9 widescreen picture mapped to the full
monitor height with the corresponding loss of the left and right picture edges.
Automatic Aspect Ratio Selection
There are three auto modes available. When any of these is selected the actual
aspect ratio selected will depend on the input video AFD. The AFD reader will also
automatically set the output WSS when Widescreen Signalling is set to auto.
Selecting Auto 16:9 for all AFD input codes will give an anamorphic aspect ratio
conversion and for a 625-line output, WSS will be set to 16:9 full frame. When set to
Auto 4:3 the output aspect ratio and WSS data will depend on the input AFD.
Undefined/reserved and full frame codes will produce a Letterbox aspect ratio with
the output WSS set to 16:9 Letterbox. Pillarbox 4:3, Pillarbox 14:9 and Letterbox
greater than 16:9 will give a centre cut conversion and set output WSS to full format
4:3. Selecting Auto Adaptive for any full frame input will give an anamorphic aspect
ratio with WSS set to full frame 16:9. Pillarbox 4:3 will give a centre cut conversion
and set output WSS to full format 4:3. Undefined/reserved, Pillarbox 14:9 and
Letterbox greater than 16:9 will make no change so the previous conversion will
remain. On power up the default conversion will be Anamorphic.
Incoming
AFD value
Explanation
Auto 16:9
Conversion
(output WSS)
Auto 4:3
conversion
(output WSS)
Auto adaptive
Conversion
(output WSS)
0, 1, 5, 6, 7,
12
Undefined/reserved
Anamorphic
(full format 16:9)
Letterbox
(box 16:9
centre)
No change, as
previous
2, 8, 10, 14,
15
Full frame
Anamorphic
(full format 16:9)
Letterbox
(box 16:9
centre)
Anamorphic
(full format 16:9)
9, 13
Pillarbox 4:3
Anamorphic
(full format 16:9)
Centre cut
(full format 4:3)
Centre cut
(full format 4:3)
3, 11
Pillarbox 14:9
Anamorphic
(full format 16:9)
Letterbox
(box 14:9
centre)
No change, as
previous
4
Letterbox >16:9
Anamorphic
(full format 16:9)
Centre cut
(full format 4:3)
No change, as
previous
Response to SMPTE 2016 AFD codes
Note:
Widescreen Signalling must be set to Auto for the output WSS to be
automatically set by the incoming AFD data. These controls are disabled
when the input is standard definition.
Q-Down-AG 3G/ATG 3G User Manual R2.1
15
11 July 2019
