Originally Posted by milacqua
I followed the instructions which seemed to indicate that sending the supposedly better Marvel processor directly to the display (Epson projector in my case) would result in the better picture because it would carry only video and no audio. The HDMI 2 output contains the lessor processor and in split mode would provide virtually no video processing to degrade the audio. Accordingly, you were suppose to get the best of both worlds and was the main reason the split mode was designed.
The Marvell chip is only "superior" if you're the type of person who uses its various optional settings to tinker with your picture, or if you use the Blu-ray player to upconvert 1080p to 4k. If you don't use any of those settings (and you shouldn't - calibration should be done in the display) or 4k upconversion, the Marvell chip has no advantage at all.
Keep in mind that the OPPO player has two processing chips. The MediaTek processor does the bulk of the gruntwork for both HDMI outputs, including deinterlacing or upconverting standard-definition content to 1080p. The Marvell chip is only used for the optional picture control settings and for upconversion from 1080p to 4k.
So, for example, if you play a DVD to watch on a 4k TV, the MediaTek chip upconverts from 480i to 1080p and then the Marvell chip takes over and does the rest of the upconversion from 1080p to 4k.
Frankly, when I go back and forth in dual mode, I can't tell much difnferece.
The Marvell chip applies some measure of DNR to everything on HDMI 1, regardless of whether you have the optional DNR setting turned on or off. The filtering is mild on Blu-ray content, but much stronger on DVD.