What is the difference between CD and DVD bitrate playback?

Question

Particularly on Divx DVD Players. I've got some High Quality video to encode, but I don't want to waste a dvd if it'll playback on a regular CD with the same read speed. Question is, does it read at the same speed? If not, what is that maximum bitrate for CD and DVD formats?

Answer 1

The original CD-ROM speed was 1.5 Mbits/s (This is considered 1X); however, modern CD drives can read well above that speed.

The original DVD read spead was about 10 Mbits.

Most Divx movies are not above 1.5 Mbits, so reading from a CD should not be an issue.

Answer 2

CDs are 2 channels by 24 KHz. Comparatively low bit rate. DVDs are 5 channels by 48 KHz or 2 channels by 96 KHz plus the .1 channel and the video. The audio alone in a DVD is several times the bit rate of a CD. The video is orders of magnitude higher bit rates than a CD is capable of. Even standard definition DVDs support video bit rates up to 6 GHz, or 6,000,000 KHz. I don't know what the bit rates of Divx are nor do I know what the raw bit rates of either format are though I do know DVDs are orders of magnitude higher.