Aspect Ratio and Active Format


 Video Signal Shape (click to copy
SVGTo get the above shape as a Scalable Vector Graphics image file, click on the picture, then paste the copied text into a plain text file and save with a .svg file extension. Use in Word documents, post to Websites, etc.
)
Video Frame:Provide the geometry of the overall Video Frame, including any Letterbox or Pillarbox Adjustment Bars
 Show a
FrameSet the Aspect Ratio of the Video Frame
with a
PixelSet the Aspect Ratio of an individual Pixel
Aspect Ratio
Active ContentProvide the geometry of the area containing Active Content (other than Letterbox or Pillarbox Adjustment Bars) within the Video Frame
:		 Show
ContentSet the Aspect Ratio of the Active Content within the Video Frame
with a
ProtectedSet the Aspect Ratio of the Protected Content within the Active Content
Area
AFD and BarsActive Format Descriptor and Bar Data
:
Describes the Active and Protected Content Aspect Ratios, and whether Active is at the Top, through an enumerated list entry
:
SubtitlesShow where Subtitles or Captions would be rendered
:
Whether to display Subtitles
:

Scaling for Display

Content
renderedScaling of the Video Frame, utilizing padding and/or cropping, will be performed based on the given Active and Protected Content Aspect Ratios, to fill the display as much as possible, while also showing as much as possible of the original content.
onto a
Display DeviceSet the Aspect Ratio of the Display Device where the indicated video signal is being shown

ActiveThe Active Content Aspect Ratio of the remaining Image
= :,
ProtectedThe Protected Content Aspect Ratio of the remaining Image
= :
SourceShows the scaling window into the source frame. WxH(x,y,w,h): WxH = source frame size, x,y = source window position, w,h = source window size
:
DestinationShows the scaling window onto the display frame. WxH(x,y,w,h): WxH = display frame size, x,y = destination window position, w,h = destination window size
:

AFD Chart: Frame with alternative Active Format Descriptors

Full Frame
0b1000
16:9 (top)
0b0010
4:3
0b1001
14:9 (top)
0b0011
16:9
0b1010
4:3 with 14:9 shoot&protect
0b1101
14:9
0b1011
16:9 with 14:9 shoot&protect
0b1110
64:27 (> 16:9)
0b0100
16:9 with 4:3 shoot&protect
0b1111
CTA-861 AVI InfoFrame:
Data Byte 1 Y2 Y1 Y0 A0= B1= B0= S1 S0
Data Byte 2 C1 C0 M = R =
Data Byte 3 ITC EC2 EC1 EC0 Q1 Q0 SC1 SC0
Data Byte 4 VIC1 =
Data Byte 5 YQ1 YQ0 CN1 CN0 PR3 PR2 PR1 PR0
Data Byte 6 ETB07-ETB00 =
Data Byte 7 ETB15-ETB08 =
Data Byte 8 SBB07-SBB00 =
Data Byte 9 SBB15-SBB08 =
Data Byte 10 ELB07-ELB00 =
Data Byte 11 ELB15-ELB08 =
Data Byte 12 SRB07-SRB00 =
Data Byte 13 SRB15-SRB08 =
Data Byte 14 ACE3 ACE2 ACE1 ACE0 FR3 FR2 FR1 FR0
Data Byte 15 F157=0 FR4 RID2 =
Notes:
1 VICs map to 23,24,25,48,50,60,100,120 Hz, with RID=0.
2 RID used for 144 Hz and up, or if VIC list is 0. Set VIC=0 if RID≠0.

Version 0.9, 2024-11-12

Support: sub-afdasp @ scara . com

Latest Version: https://scarabaeus.org/afd/

Copyright © 2024 Scarabaeus / Christian Wolff. All rights reserved.

Revision History:
  • 0.1: 2022-04-08, initial version
  • 0.2: 2024-10-20, added support for subtitles, AFD tag
  • 0.3: 2024-10-22, added support for vertical ARs, provide SVG source as XML in clipboard, style cleanup
  • 0.4: 2024-10-23, added support for resolutions
  • 0.5: 2024-10-30, added cropping / padding for 4:3, 16:9 and 64:27 displays
  • 0.6: 2024-10-31, added determination of scaling windows
  • 0.7: 2024-11-06, added CTA-861 AVI InfoFrame values, fixed scaling windows
  • 0.8: 2024-11-11, vertically oriented and more compact redesign of UI (mobile friendly), add DCI and 32:9 display, fix scaling calc for anamorphic pixels
  • 0.9: 2024-11-12, added tool tips, one adjustable display instead of five separate fixed ones