So BenQ in their infinite wisdom decided Bob deinterlace was the best method to deinterlace, when most other manufacturers decided motion adaptive deinterlace is superior and actually better, like ViewSonic. Got their EX2510 and apparently that was how they decided to do deinterlace…
The other problem is the ATSC Tuner I just got (a Proscan PAT102-B/D) has motion adaptive deinterlace, but outputs 60.00hz in 720p and 1080p instead of the industry standard 59.94hz for NTSC. This means dropped frames or mistimed frames every 60000/1001 frames or so. The rest of the time it’s perfect with frame time consistency, but because of the mismatch, it runs into this issue.
Fortunately some people have looked into the firmware for these receivers and found you can actually modify it. I just don’t have the know how to correct the 720p and 1080p modes to 59.94hz. 480i and 1080i though are proper 59.94hz.
http://www.devttys0.com/2012/08/reverse-engineering-a-dtv-converter/
But the alternative is I get a HDMI to HDMI deinterlacer like the Extron DSC HD-HD. The biggest problem is static elements in a bob deinterlace function on a high refresh rate display causes severe temporary image retention. This wasn’t a issue with lower refresh but is a HUGE issue with high refresh displays and BenQ should have had a better deinterlace like ViewSonic.
This is being stuck inbetween a rock and a hard place. Pull the firmware and modifying the Proscan firmware through UART or a BIOS chip clip? (would fix 720p channels and skip a interlacing step) Or get the Extron scaler which is overkill for a $30 converter box, and would effectively deinterlace a 720p signal twice? (no station in 720p where I live is native 720p, they are all deinterlaced from 1080i)
Not many people pay attention to 59.94 vs 60.00. Also, Linux can’t even detect the 120.00hz mode on this monitor, (only the 119.88hz mode) but Windows can!
Side note, the upcoming Retrotink 5X also uses bob deinterlace with 1080i so it’s no better. It would also have to go through the Extron DSC HD-HD for 1080i. OSSC Pro should support it, but it’s an arm and a leg and not released yet.
If there’s no easy solution, I have to make a video warning people not to use bob deinterlace on high refresh panels.