What is the mainstream specification of the recorder now? Presumably many friends will answer that they are fully compatible, then do you really understand the meaning of full compatibility? Which disc specifications are included in full compatibility? Below, the author will give you a clear answer, so as not to be fooled by JS at the time of purchase.
Full compatibility is actually translated by many media or manufacturers according to SuperMulti, usually with the names of "all-round" or "full specification", meaning the same, is compatible with mainstream DVD and CD disc specifications.
SuperMulti of ownership at the end of last year LG all other manufacturers of products with the specifications big call "Almighty King", "Super King" and other specifications are the same, only the name is different.
SuperMulti from the second half of last year began to flood the market, whether to become the mainstream standard DVD burner, which is the most important specifications of DVD-RAM, a rewritable DVD discs 100,000. Currently mainstream mainstream compatible recorders support the DVD-RAM format, but are still in the early stages of consumer applications.
Here we mainly introduce the format DVD SuperMulti included, and give you a simple explanation.
1, DVD-R /RW
DVD-R /RW Pioneer developed in Japan, and is the DVD Forum (the current standard DVD format mainly determine the organization) certified DVD One of the burning technologies. The full name of DVD-R is DVD-Recordable, which is defined as Write once DVD (DVD), which is different from DVD+R.
DVD-R can only do a one-time write operation of data, while the DVD-RW rewritable data can be repeated a plurality of times. The DVD-R/RW has made great progress in compatibility and cost, and it is perfectly compatible with DVD players, so it has been widely supported by the industry and became the main product of the DVD Forum.
However, the disc itself on the design point of view, LPP addressing accuracy is low (a ECCB [16 sectors] a LPP address, and does not provide an absolute physical address information, can only provide the relative address Information), so only limited random access capability can be achieved, which is its fatal weakness. Although in the supplementary write (multi-session write), background formatting, etc., through the day after day efforts to be equal to the DVD+ format, but the LPP design caused by the damage is irreparable, and thus in the DVD+ format In the confrontation, it is gradually at a disadvantage.
2, DVD+R/RW
DVD+R/RW is a DVD+RW Alliance organization jointly created by Sony, Philips and HP (unlike the DVD forum mentioned above, It is developed by another DVD standard development organization that competes with it. In order to distinguish from DVD-R, DVD+R is called DVD Recordable (recordable DVD). Features
DVD + R /RW is an excellent means of physical design, together with the powerful logic function, DVD + R /RW has the above capabilities on a DVD-R /RW. That is to say, DVD-R/RW can do it, DVD+R/RW can be, but the reverse is different. And it has always been ahead of DVD- in speed improvement, and everyone should have experience with this. As can be seen from the above figure, in the PC market, the DVD+RW format is already ahead of the DVD-RW format, which is not without reason. Although, for some people, DVD+R/RW has compatibility concerns with DVD-R/RW, the emergence of BookType technology and the gradual retirement of old-fashioned DVD-ROMs and DVD players have made The compatibility of DVD+R/RW in the industry has been getting better and better. As for the Jitter standard, DVD+ (9%) is one percentage point higher than DVD-(8%), and it is not worth mentioning. It does not mean anything.
In terms of comprehensive capabilities, DVD+R/RW discs are obviously stronger. If you are a more demanding user, it is recommended to use DVD+R/RW discs. Someone once said that DVD-R/RW is suitable for storing movies. Because of its compatibility, DVD+R/RW is more suitable for storing data because of its good performance. However, when using a combination of DVD+R/RW and BookType, the compatibility advantages of DVD-R/RW may be lost. So I think that if you can modify the BookType, DVD+R/RW is a common format. It should be pointed out here that movies and so-called data can be regarded as "data", but it involves a compatibility issue of a DVD player, so it is futile to analyze who is more suitable for storing movies or data from the physical format. On the DVD, the data is stored in ECCB. The only difference is the logical architecture, but this is not related to the format of the disc itself, but will be the content of the DVD-Video and DVD-ROM application specifications.
for the average PC user, select DVD- or DVD + are no problem, DVD + advantages will be more evident in the field of consumer electronics (DVD + random addressing and lossless linking capabilities that provide a more Good editability), both for daily data storage and movie preservation.
3, DVD+/-R DL
The English is DVD+R Double Layer, the recording layer is a single-sided double-layer DVD burning disc, usually called D9, its capacity is DVD+ Double the /-R. The working principle is to increase the data layer to two layers, sandwiching a semi-transparent reflective layer in the middle, so that when reading the second layer of data, it is not necessary to flip the DVD disc and directly switch the focus of the laser reading head. The location is ok.
At present, the maximum speed of the disc reaches 8X, and the support of the recorder to DVD+R DL has reached 10X, and the good quality disc can also be super-engraved to 10X.
4, DVD-RAM
DVD-RAM is a Hitachi, Matsushita and Toshiba and other manufacturers pioneered the development of rewritable DVD standard, is the first to come out of the rewritable DVD standard . Relatively speaking, the DVD-RAM format has a faster recording speed, high data reliability, and simple storage operation. Its biggest advantage is to support random storage of data, that is, when loading a DVD-RAM disc, you can use the mouse drive as a hard disk, and use the mouse to drag to add and delete data, which is more in line with the general user's access habits. . Moreover, the DVD-RAM disc rewrite test is much higher than DVD-RW or DVD+RW, the latter two are basically about 1000 times, and the DVD-RAM disc can be rewritten up to 100,000 times.
capacity DVD-RAM There are two main, 4.7GB and 9.4GB. The write speed is currently mostly 5X, but some recorder products have already supported 12X, and 12X DVD-RAM has been sold abroad, but it is not available in China for the time being.