Sony MVS-8000SF User Manual page 502

Aspect
In the source coordinate space, changes the aspect ratio in the x-axis direction
and y-axis direction, either independently or simultaneously.
Change of aspect ratio in
x-axis direction
Perspective
In the target coordinate space, changes the perspective on the image by
changing an imaginary view point, without changing the position of the image.
The x-axis and y-axis values define the position of the view point. The z-axis
value defines its distance from the image.
Change of view point on
x-axis
Skew
In the source coordinate space, change the skew of the image on the x-axis or
y-axis.
502
DME
Change of aspect ratio in
y-axis direction
Change of view point on
y-axis
Change of skew on x-axis
Simultaneous change
aspect ratio in x-axis
direction and y-axis direction
Change of distance from
view point to image
Change of skew on y-axis