Quantum Data 881 User Manual page 634

CXAR
Class
Description
Command syntax
256 Appendix A Command Reference
Content Aspect Ratio
Format parameter setting - Active Video
Sets the aspect ratio of the source image content.
CXAR aspect_ratio
aspect_ratio
0.75 to 2.39
The following table provides a listing of established aspect ratios.
Aspect Ratio Symbol
0.750 OT or T
90
0.800 OG or G
90
1.000 Q
1.250 G
1
1.333... T (A)
1
˜1.37 C (B)
1.444... I
1
1.500 V (T)
1
1.555... M (V)
1.600 D
1.666... E
1.750 Z
1.777... H
1
˜1.85 A (F)
2.000 U
1
˜2.20 F (M)
1
˜2.39 B (C)
1. The letters in parenthesis are the letters that we used to use, before we updated our aspect ratio symbols for compatibiliity
with existing film industry standards (i.e. the symbols defined in SMPTE RP40).
2. In 1932, the shape of film was changed from 1.33:1 to 1.37:1 in order to better accommodate the new optical soundtrack that
was added a few years earlier. This slightly wider shape is the true aspect ratio of "classic" film. The aperture is commonly
referred to as "Academy" and was the shape of the vast majority of U.S. films produced until the 1950s.
3. Sometimes called "2.35", which was the aspect ratio before it was changed to 2.39:1 in 1971 to keep splices from showing up
in the projected image.
Description
Television Portrait 3x4, 480x640, 600x800, 768x1024,
960x1280, 1200x1600
Workstation Graphics 4x5, 1024x1280, 1280x1600
Portrait
Quadrate, "Square" 1x1, 512x512, 1024x1024
Workstation Graphics 5x4, 1280x1024, 1600x1280
SDTV / Silent Film 4x3, 640x480, 800x600, 1024x768,
1280x960, 1600x1200
2
Academy "Classic" ˜4x3, 0.825x0.602 SMPTE RP40 35mm "C"
with sound
IMAX™ 13x9, IMAX™
Vista Vision™ 3x2, 1152x768 Apple Computer
(uncropped) Vista Vision™
Mid 14x9, AFD Shoot and Protect (half-way
between 4x3 and 16x9)
16 Decimal 16x10, 1728x1080, 1280x800, see VESA
CVT 1.0
European Film, "1.66 5x3, 1200x720, 1280x768, 1800x1080
Old Film 7x4, Old Metro-Goldwyn-Mayer and Disney
Films
HDTV 16x9, 1280x720,1920x1080
Film Standard (USA) ˜13x7, 1280x692, 1920x1038, 0.825x0.446
SMPTE RP40 35mm "A"
Univisum™ 2x1, 1280x640, 1920x960
"Flat", MPEG "20x9" "˜11x5, 1280x582, 1920x874, 1.912x0.870
SMPTE RP91 70mm
Anamorphic Cinema, ˜12x5, 1280x536, 1920x804, 1.650x0.690
3
"2.35" SMPTE RP40 35mm "B"
Examples