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Figure 3.101 Down-conversion Grades
3.13.4.5.2
Aspect Ratio Conversion
Whilst all high definition video services have a 16:9 aspect ratio, standard definition
services have a number of different possible aspect ratios (4:3, 14:9, 16:9). The
RX8000 has the capability to define how an incoming 16:9 service should be
displayed on a 4:3 aspect ratio monitor and how the display aspect ratio should be
controlled on a dynamic basis.
As part of the HD to SD down-conversion process, the RX8000 is capable of
performing aspect ratio conversion from an incoming, native HD 16:9 service to a
4:3 SD video output. As part of the aspect ratio conversion process it is possible to
set the output as a center cut or letterbox. The output SD aspect ratio can be
controlled dynamically by using an Active Format Descriptor (AFD) signal.
3.13.4.5.3
Up-conversion
Up-conversion cannot be performed when decoding 4:2:2 video formats or when the
video is being decoded by the 4:2:2 Decoder option card, therefore it is only a
feature of the Base Decoder fitted to the RX8200.
3.13.4.5.4
Simultaneous Dolby Digital 5.1 and Stereo Output
To partner the RX8200's capability to present simultaneously both native HD and
locally derived, down-converted SD video, the RX8200 has the ability to process the
source audio service in a manner that is suitable to both HD and SD video. The
RX8200 can "pass-thru" the native compressed Dolby Digital 5.1 service embedding
the audio stream on the HD-SDI output. Additionally the RX8200 can decode and
down-mix that 5.1 audio service to stereo, outputting the stereo audio channels
alongside the SD video output.
This feature requires the 4 Audio license (RX8200/SWO/4AUD) and Dolby Digital
license (RX8200/SWO/AC3).
EN/LZT 790 0005 R7A
Grade 2 down-conversion
Significant improvement to diagonal lines
More detail without more noise
Using the Equipment
High Quality down-conversion
3-213
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