I don't think CLV 'holds half' what CAV does
I meant that CAV holds half the amount of video than CLV, timewise.
I suspect they actually hold the same amount of signal information, just distributed differently. However, like I wrote before, I suspect purely mechanical considerations come into play. The laser spot size is finite for both kinds of discs, so it stands to reason if the data are further spread out (i.e. in CAV) then it will be easier to read accurately.
Imagine you're re-typing a block of text. If that block of text came in two versions, one on two pages, double-spaced, in a large readable font and the other on one page, single-spaced, in 8-point Arial Narrow, which do you think you'd have an easier time re-typing? Same information, different packaging. I don't know for a fact, but I strongly suspect that this is akin to how CAV and CLV differ.
I meant that CAV holds half the amount of video than CLV, timewise.
I suspect they actually hold the same amount of signal information, just distributed differently. However, like I wrote before, I suspect purely mechanical considerations come into play. The laser spot size is finite for both kinds of discs, so it stands to reason if the data are further spread out (i.e. in CAV) then it will be easier to read accurately.
Imagine you're re-typing a block of text. If that block of text came in two versions, one on two pages, double-spaced, in a large readable font and the other on one page, single-spaced, in 8-point Arial Narrow, which do you think you'd have an easier time re-typing? Same information, different packaging. I don't know for a fact, but I strongly suspect that this is akin to how CAV and CLV differ.
That's actually kinda what I was trying to say, but you said it better. I'm not trying to say that I think the CAV discs actually have more or even better information than CLV (and I'm not saying they don't, I don't know). I just mean that my player (and surely some others) do play CAV & CLV with different results, whatever the reason. Which causes me to prefer the CAV format, regardless of wheather the CLV have the same info or not. As said previously, if it can't be extracted, then it doesn't do me any good if it's there or not. If my player played them both at the same quality, I wouldn't care which format I had.