It is still oversimplified. You may get more detail out of an 8Mbps MPEG4 stream versus a 10 Mpbs MPEG2 stream. The codec has significantly more impact than is conveyed in the article.SteveHas said:
As has been said dozens of times before, there is only one way to determine picture quality. Compare the source to the output pixel-by-pixel. The percentage of pixels that come out matching is a percentage of picture quality. Though discussing less detailed numbers is easier, it is not productive.