If you are talking about up-sampling of video to 1080p than it has absolutely nothing to do with CD playback.
Also, up-sampling of redbook CD will sound different but not necessary better. It depends on how it is done and your personal taste. It is like two cars of the same model, one with manual transmission, one with automatic. They will drive differently for sure but which one is better?
Also, up-sampling of redbook CD will sound different but not necessary better. It depends on how it is done and your personal taste. It is like two cars of the same model, one with manual transmission, one with automatic. They will drive differently for sure but which one is better?