> And afaik there are no external HDMI pixel doublers on the market, I would buy one in a heartbeat.
Sounds like a fun project, you should build one.
Sounds like a fun project, you should build one.
Taking in a 720p hdmi signal and pixel doubling to 1440p or tripling to 4k and outputting that as a valid HDMI signal without adding more than a frame or two of lag would require custom chips. Although maybe a software solution involving a gpu might be possible?
Implementation is left an as exercise for the reader.