Cisco D9054 Installation And Operation Manual page 107

Setting Up the H.264 Aspect Ratio,
• If you select Off, no AFD signaling is present in the user data bits.
• All other selections will force AFD signaling to the new setting, regardless of
the video format.
4. Set the Bar Data.
Bar data is used during format conversion to scale the image for the optimum
width and height of the picture when AFD cannot signal the exact format (e.g.,
for Cinemascope movies). It can also be used for other non-standard-size picture
display. The possible selections are: Off, Auto, Top and Bottom Bars, or Left and
Right Bars. The default setting is Off. Select Auto for the encoder to
automatically scale the image.
The diagram below shows the standards which define the use of AFD and bar
data in the transmitted signal from receipt by the encoder to display by a set-top
box.
Bar data signals one pair of bars only; either Top and Bottom Bars or Left and
Right Bars.
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D9054
Encoder
D9054 HDTV Encoder Intstallation and Operation Guide
Receiver
Set-Top Box
Display
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