So if I have a camera system of i.e. HD resolution of 1920 x 1080 pixels the actuall resolution of this sample raster is only 960 X 540 pixels.

Yes or no? Actually somewhere in between?

According to a remarkable new study, however, the failure of new audio formats — at least the ones that claim superiority thanks to higher sample rates — to succeed commercially may in reality be meaningless. The study basically says that (with apologies to Firesign Theatre) everything you, I, Moorer and everyone else know about how much better high-sample-rate audio sounds is wrong.

The study was published in Journal of the Audio Engineering Society under the title “Audibility of a CD-Standard A/D/A Loop Inserted Into High-Resolution Audio Playback.” The study blew me away for a number of reasons. One is that it was almost identical to a study I proposed some years ago at the school where I was teaching, but it never got past the proposal stage. Second, the two authors of the study, David Moran and Brad Meyer, happen to be people whom I've known for several decades (we were all part of the crew covering audio and other technologies at The Boston Phoenix when I was starting out as a writer), but I had little idea what they were up to these days.

The main reason it knocked the wind out of me was its conclusions. It was designed to show whether real people, with good ears, can hear any differences between “high-resolution” audio and the 44.1kHz/16-bit CD standard. And the answer Moran and Meyer came up with, after hundreds of trials with dozens of subjects using four different top-tier systems playing a wide variety of music, is, “No, they can't.”

Via:http://mixonline.com/recording/mixing/audio_emperors_new_sampling/

Check full paper http://www.drewdaniels.com/audible.pdf