Ok, we weren't talking about professional CD's or DVD's...
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Originally Posted by Thomas Anderson
VCD uses MPEG-1 compression, but only uses a bit-rate of 1150 kbps with a picture size of 352 x 288 .... which means that it is only as good quality as an old VHS tape.
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That quality is about the same as a VHS tape out of the box. If done correctly, it's hard to tell the difference between VCD and DVD when looked at on a regular size TV.
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It is possible to use different types of MPEG encoding to produce higher qualities; such as SVCD which uses MPEG-2 and a higher bitrate and larger picture size.
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SVCD is basically the same as DVD; the codec is the same. The only difference is in the amount of time you want to record on a disk. You can fit about an hour of video on an SVCD disk and again, it's really hard to tell the difference in the picture quality if compared to DVD.
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DVD is of course the ultimate quality format, using encoding bitrates of up to about 12mbps, and AC3 audio encoding of up to 448kbps.
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DVD can use any bitrate, and the only real advantage is the size of the disk... You have to remember that a regular PAL television only shows 768x576 pixels. So anything above that is basically wasted. DVD's are good for bigger screens, but on TV SVCD or even VCD are perfectly watchable.
Ice