How many?
2007-05-02 02:46:05 · 3 answers · asked by bstuek 1 in Consumer Electronics ➔ Home Theater
Depending on how you count them at least 20.
See these sites for what they are and a brief explanation of each
http://www.webopedia.com/DidYouKnow/Hardware_Software/2003/DVDFormatsExplained.asp
Also see: http://www.videohelp.com/dvd
2007-05-02 03:45:25 · answer #1 · answered by Jerry 7 · 0⤊ 0⤋
It depends what you mean by formats.
If you mean recordable formats, there are DVD+R, DVD-R (write once, read many), DVD+RW, DVD-RW (multiple read and write) and DVD-RAM (a multi read and write format usually used like a small hard drive for computers).
In addition there is the DVD-ROM disks (literally, read only memory) produced for commercial sale.
To these you can add DL (or double layer) DVD-R and DVD+R.
If you include types of DVDs sold commercially, there are predominantly normal DVDs and DVD-A (audio), but other non-standard disks designated DVD-VCD and DVD-SVCD exist.
If you get into types of formats which can be coded onto DVD the number gets quite large. Some examples, DVD-MP3, DVD-JPEG, DVD-WMA, DVD-Divx.
See the links for info on the main "formats".
2007-05-02 10:53:29 · answer #2 · answered by agb90spruce 7 · 0⤊ 0⤋
regular dvd, hd-dvd, then bluray which is the best of all.
2007-05-02 12:23:57 · answer #3 · answered by Answer Man 2 · 0⤊ 2⤋