Why is the Widescreen Enhanced Resolution pattern limited to a lower horizontal resolution than the regular resolution patterns?
In terms of bandwidth, the highest horizontal resolution is actually the same the regular and widescreen enhanced resolution patterns. The way resolution is expressed in video terminology is makes the numbers differ. Television resolution is traditionally expressed as TV lines of resolution. This is a measure of the number distinguishable lines across a width of screen that is equal to the screen height. Because the widescreen enhanced pictures are shorter relative to their width, the maximum TVL number is lower even though bandwidth is the same.
