The following five main terms used to describe the way data is stored on the discs:
DVD-ROM - (Read Only Memory) - has data that can only be read and not written.
DVD-R and DVD+R - can record data only once and then function as a DVD-ROM.
DVD-RW, DVD+RW and DVD-RAM - can both record and erase data multiple times.
DVD-Video - disc with formatted and structured video content, similar to Video CD;
DVD-Audio - music disc, similar to the music CD;
All the above DVDs can be played on a standard DVD Player. Many people may also want to know the difference between movie DVDs and DVDs made on a DVD recorder or PC. Actually, the main difference is the copy right protection. The DVD movies we buy are physically stamped, also contain Macrovision anti-copy protection that prevents them from being copied onto a homemade VHS tape or DVD, while the DVDs we make at home or on PC are optically burned by a laser and generally do not contain the Macrovision anti-copy protection.
However, the recordable DVD will mimic the properties of commercial DVDs, so as to maintain playback compatibility with standard DVD players.
In any case, DVD has its disadvantages even thought it is very successful. We can not play the DVD movie or data directly on portable device. We need a DVD Ripper to rip the DVD to any other format to be watched on digit gadgets. Pavtube DVD Ripper is designed to meet the needs. With it, you can split the DVD to different titles and chapter, edit DVD clips with trim, crop, add effect, and adjust settings to get better effects. Whats more, it supports batch conversion which allows you to convert batch of DVD chapters to the format you want at one time. As long as you use it, you will realize it is your right choice.