Figure 3.48 Selecting Automatic Aspect Ratio Conversion
3.7.24.5 AFD Codes Passing Thru the Encode Chain
The AFD codes received on the input are passed through the encoding chain as
follows:
• The HD output will always pass the AFD code as received on the input.
• When an HD input is used, the down-converted output (SD or PiP) will make use
of the AFD code and consume it in the down-conversion process. The AFD code
in the output will therefore signal as coded frame.
• When an SD input is used, the encoder will always pass the AFD code as
received on the input (as no down-conversion takes place).
Figure 3.49 AFD Code Passing Thru the Encode Chain
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