314 Chapter 9 Testing HDMI Sink Devices
AFD describes the portion of the coded video frame that is “of interest” (or “active”). The
appropriate AFD information is transmitted with the video to the HDMI display as part of
AVI InfoFrame packets. Using AFD information, the display is able to present the image
optimally.
For AFD testing, the 882 allows you to apply different AFD cases using the AFDtest
image, which provides 12 different cases (as image versions) for both 4:3 and 16:9
displays. As each image version appears, the appropriate AFD information is sent with the
video to the display.
The following table lists the AFD cases (as specified in the ETSI TR 101 154 v.1.4.1
standard) that are provided by the 882.
To test an HDMI display’s ability to support AFD:
1. Set up the 882 for HDMI output. See “Setting up the 882 for HDMI testing” on page 259.
2. Press the Source key and choose a format suitable for the HDMI display (for example,
DMT0660).
Alternatively, to select the format using the command line interface, enter the following
commands:
FMTP /tffs0/Library/Formats // Set format path to 882 memory
FMTL DMT0660 // Loads the DMT0660 format
FMTU // Activates the DMT0660 format
3. Press the Content key and choose the AFDtest image.
Alternatively, to select the image using the command line interface, enter the following
commands:
IMGP /tffs0/Library/Images // Set image path to 882 memory
IMGL AFDTEST // Loads the AFDtest image
AFD case
Image
Version
(4:3 Format)
Image
Version
(16:9 Format) Aspect Ratio of Active Area
287box 16:9 (top)
354box 14:9 (top)
4 9-12 9-12 box > 16:9 (center)
8 0 6 Same as the signal format
9 1 1 4:3 (center)
10 7 8 16:9 (center)
11 4 3 14:9 (center)
13 3 5 4:3 (with shoot and protect 14:9 center)
14 6 2 16:9 (with shoot and protect 14:9 center)
15 2 0 16:9 (with shoot and protect 4:3 center)
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