DVD

[medve]

DVD idézet: (CLV - állandó kerületi sebesség
             CAV - állandó szögsebesség) 

Bocs az angolért, de nem volt időm fordítani.

Forrás: http://www.liteonit.com/ODD/English/e_service/e_dvd%20rw%20faq.asp#A1


Q1 	What are the differences between DVD-R / RW, DVD+R / RW and DVD-RAM?

A1 	There are 3 main streams :
DVD-R / RW : leads by Pioneer and Sharp
DVD+R / RW : leads by Sony, Philips and HP
DVD-RAM : leads by Panasonic, Toshiba and Hitachi

DVD-RAM
DVD-RAM uses Zone Constant Linear Velocity ( also known as Z-CLV ) for
reading. It divides the disc into several districts and arranges in a spiral
way. Each district contains several sectors. Each sector has its own physical
address. Therefore, it uses the same " Data Random Storage " as HDD, which
also provides burning repetition.

DVD-R / RW
Its burning principle is similar to CD-R / RW, which uses Constant Linear
Velocity (also known as CLV). A DVD-R can only be burned once. But DVD-RW uses
" Phase Change " burning technology; therefore, it can be re-burned.

DVD+R / RW
DVD+R / RW are the same as DVD-RAM, but it also provides Constant Angular
Velocity ( also known as CAV ) for burning, where the device must maintain at
a constant speed during burning processes. If it fails to do so, the burning
processes must be stopped or else the disc may not be read by ROM devices,
such as DVD Player or DVD-ROM. Such circumstances are called " Linking Loss ".
To prevent such circumstances, DVD+R / RW has developed a " Lossless Linking "
technique to provide Various Burning Rate ( VBR ).



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