> Dirty secret of video: The resolution matters a lot less than people tend to claim. Precisely. Video compression is about reducing redundancies. A perfect lo

> Dirty secret of video: The resolution matters a lot less than people tend to claim. Precisely. Video compression is about reducing redundancies. A perfect lossless video compressor would essentially take a bitmap format and turn it into a vector format. Vector formats have no inherent resolution. Now real life compressors are neither lossless, nor perfect, but it's easy to see that the better they better they become, they more and more become resolution-independent, in a way. Compression performance depends on the ratio between the information entropy of the input and output signal, which only loosely correlate with resolution. > Another place you can see this is cameras, especially cell phone cameras. Yeah, you can also see this with medium format camera backs. They will produce better images at a given target resolution than a full frame sensor at the same target resolution. Most people don't expect an old medium-format back that "only" has 30Mpix to be any better than a current full frame sensor of the same resolution, but blow images at 100% and the medium format simply has more detail.