5.5

Table Of Contents
Raster Dimensions
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Raster Dimensions
Some earlier versions of Avid editing applications allowed you to create projects based on
some device-specific HD compression formats, including 1080i 59.94 HDV and 1080i 50
HDV. Some versions allowed you to set specific raster types for your HD projects — for
example, DVCPro HD. When you open existing projects that use these formats, current Avid
editing applications preserve the raster size (the dimensions of the video frame displayed in
the monitor) for your project and list the raster as an option in the Raster Dimension menu.
New HD projects on systems with supported configurations allow you to directly select the
raster size used for playback and editing. This allows your Avid editing application to
support HD compression formats that use anamorphically-scaled, nonstandard HD raster
sizes. These formats include those compatible with a variety of professional HD devices and
standards.
Using the Raster Dimension selection lets you improve the playback of your HD sequences
without having to transcode the video to an Avid DNxHD resolution.
Supported system configurations include the following:
Media Composer v3.5 or later
NewsCutter v7.5 or later
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Media Composer and NewsCutter systems connected to an Avid Adrenaline or Avid Mojo
device do not support all raster sizes available in other input/output configurations.
When you select an HD project format in the New Project dialog box, a Raster Dimension
menu appears allowing you to select from the formats available for the selected project type.
This lets you play back your sequence in the native raster size for certain HD formats. When
you output your final HD sequence, your Avid editing application resizes the sequence to the
standard raster size for your project.
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Standard raster sizes for 1080i/1080p and 720p projects are 1920 x 1080 and 1280 x 720,
respectively. All other rasters are called "thin rasters" because the horizontal resolution is
lower than the standard rasters.
The format you select to work in also determines which HD compression is used by your
Avid editing application. For example, if your HD project format is 1080i 59.94 and you
select a raster dimension of 1440 x 1080, the Video Resolution menu in the Media Creation
settings dialog box displays the following options:
DNxHD-TR 145 MXF
XDCAM HD 17.5Mbits MXF