IQUDC30/IQUDC31/IQUDC32/IQUDC33
Logo Insertion
Issue 1 Rev 4
Page 101
© 2016 SAM
2.5 Animated logos
Animated logos will always be displayed as animations (there is no static frame selection).
The duration depends on the graphics image size, for example, with a 10% raster size a 10
second clip at 60Hz frame-rate could be supported.
Interlaced video standards will treat each image of the original sequence as a single field of
the resultant animation. Frame to field conversion is performed by simply removing those
lines which should not be present in a particular field.
Animated logos will not display until load is complete, and will always start from the first frame
in the sequence when fully loaded. Animated logos can be loaded as a sequence of still
images or a sequences of moving video (e.g. MPEG) files. One animation can be created
from a sequence of files of different types as long as the image size is the same in each file.
Animated logos are displayed at the output-side frame rate. If an animation is designed to be
played at 50fps but the current output standard is 59Hz it will play out faster than designed.
2.6 Logo key
The logo insertion option supports use of a pre-shaped key, a linear key or no key.
A linear key cross-fades between bacforeground and foreground so the key can
follow the shape of the logo. If the key is “pre-shaped” it is possible to simply cross-fade
between background and foreground. This would naturally change the edge shape of the logo
but the pre-processing of the key will mean that the final result will be the intended edge
shape.
