I see the following in the ADV8003 datasheet:
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The serial video receiver can accept the output of an HDMI transmitter such as the ADV7511, ADV7623 or ADV7850. Using this configuration, the transceiver can extract HDMI audio for processing before reinsertion the audio into the ADV8003 via the audio pins, for output through the HDMI transmitters. This input does not support EDID or HDCP operations.
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Based on the fact that ADV8003 serial video receiver does not support EDID or HDCP, I think we assume there will some type of DVI/HDMI receiver block before it which should be able detect the resolution and frame rate.
-Matt