First of all, let’s talk briefly about the history of DVD. In the early days, DVD was formed by ten companies: Hitachi, Panasonic, Mitsubishi, Philips, Pioneer, Sony, Thomson, Time Warner, Toshiba and JVC. Its current status It is the steering committee of the DVD Forum (this "forum" is just an industry organization, not a real online forum). Although several others later joined, they are the ones who can collect patent fees at the core. They developed DVD-ROM (that is, ordinary DVD discs). , not recording discs), they split internally after launching DVD-RAM. Sony and Philips still insisted on their beliefs and independently developed their own DVD burning specifications, thus joining forces with HP to create the opposing DVD Alliance. (also an organization), later joined by Mitsubishi Chemical/Verba, Ricoh, Yamaha, Dell, and Thomson. The main technical veterans are Sony/Philips, the old partners who jointly invented the CD, and many disc manufacturers have joined them. Their invention DVD +R +RW +R DL has been replaced by DVD +R +RW +R DL. Currently, there are about 60 members of the DVD Alliance***. The original DVD forum now has more than 200 members, but the members are of little use and are just deceptive. The specific manufacturers are:
DVD-RAM was jointly developed by Panasonic, Hitachi and Toshiba. DVD-R/RW was developed by Pioneer Corporation of Japan, while +R/RW was developed by Philips. .
In terms of technology and market share of consumer recording disks, the DVD Forum is unfortunate. There is not much technical difference between +R and -R (+R is slightly more advanced because it is later), and the market share is seven to three ( +R is very popular) and is basically dominated by + on RW and DL. Thanks to the development of booktype, + has completely reversed the situation of poor support for + series optical drives. Booktype technology allows any disc of + to be recognized as DVD-rom is an ordinary DVD movie rather than a burnable disc. Therefore, unless the optical head of the DVD drive is old, all + burnable discs should be supported, such as DL (double layer burnable disc). Since it was introduced late, even -R DL has many of its own Even if the optical drive does not recognize it, +R DL has an absolute advantage. The same is true for RW. Moreover, +RW’s fault tolerance can reach up to 512M. The life and reliability of the disc are much better than the hastily launched -RW ( However, the recognition of RW is not bad, and only a few people use it), even higher than 100M of RAM. I am not judging the merits of + - here. When it comes to the ordinary + -R, price is actually the king. Whether the optical drive's shopping guide supports booktype is an essential item for detailed evaluation abroad. If your disc is only used for backup, regardless of whether it can be read on other machines, or does not involve RW or the like, only use DVD R (-R is supported by all, +R is only not supported by some older DVD drives), you don’t need to care about it; but if you want to consider compatibility, it means that it can be read on other people’s computers. , especially rewritable RW and double-layer DL, then booktype must be considered, because under normal circumstances, RW + RW is more expensive (the reason has been explained earlier). Specifically, booktypes are divided into three types: +R, +RW, and +R DL. Except for +R DL, the Japanese manufacturers under the DVD Forum generally do not support comprehensively. Of course, if you use unofficial cracked firmware, there will be an exception. This also shows that whether or not booktype is supported is not a technical issue, but a matter of interests of DVD forum members. In this regard, Philips, Sony, and Taiwan (MTK) have much better support. Although those that do not currently support booktype can also burn +R/RW series , but if you consider the reading of other machines, be careful because many old DVD drives (which have a large number of domestic ones) cannot recognize it well, especially +RW and above.
By the way, although the recorder is not very mature yet, there is no problem with DVD +R and -R, but RW and DL are still making progress. However, more than 80 or 90% of players use +-R, nearly 10% of users use RW, and the remaining few use RAW, DL (by the way, DL is also called D9 recording disc) and the like. . DL may still have some promise, but RAM is really unnecessary and embellished.
First of all, the advertising selling point is "removable optical disc". Since it can be moved, it can at least be read elsewhere. Unfortunately, most optical drives (even many of the optical drives currently available) basically do not support it (even if a few support it, the speed is very slow). ideal), move, and dream more realistically. Secondly, "10,000 erases and writes" is very tempting, but it is actually based on good protection and high-end workmanship. In fact, excellent RAM standards are packed in boxes like floppy disks. These alone are different from those that run naked. It's very big (think of a floppy disk running naked), and this is a theoretical value. In fact, low-end RAM disks are really average (including some Japanese disks), and they can't bear the trouble. If there are many "error corrections" in China It hangs faster under the care of "King" and "Super Disk Reader" optical drives. Finally, due to the price factor, a high-end, decent RAM costing hundreds of dollars is not as cost-effective as a mobile hard drive. Of course, I would like to raise two points: 1. RAM is not used by no one. Many large companies use it for network dumps. Secondly, due to the advancement of current chips, many recorders have RAM functions themselves, so forget it. What I mean is that RAM does not matter. Whether or not it exists is not a factor worth considering. By analogy, if the new recorder is only better in DL RW than the old model, and the chip has not changed much (just a step forward), but the price difference is more than 30 yuan, I think the decision will be easy. By the way, taking the current situation as an example, since DVD +R and -R have matured, 16X has basically been capped and will not be increased (except for PX), so in the future, only the speed of +RW and +R DL will really deserve the attention of a few people. , other RAM, -R DL are just fancy, it doesn't make much sense to be fully compatible. What does it matter if a disk that will never be used in a lifetime is not compatible?
I also want to talk about the place of origin. I often see people fighting over the place of production. In fact, Malaysian and even Japanese products are not necessarily very good. Making something always requires experience. Malaysian products are not necessarily better than us, especially in terms of equipment and employees, but our country’s products are not necessarily better than ours. Factories are generally installed in recent years, and experience is inevitably insufficient. However, Malaysia has more experience than us. Malaysia = old horse, ^_^. The quality of employees and management in Japan are indeed much better, and there are no technical barriers. Of course, it is quick to get started and relatively good, but unfortunately it is also expensive. Besides, the low-end recorders costing more than 400 yuan were transferred to Japan because they could not bear the cost. As for manipulation, there seems to be no evidence of this. Recently, my country's famous Benq has also gradually improved and accumulated experience. At least the improvement compared to 1620 and 1640 is obvious. Looking at the main controller and bald head alone, Lite is not necessarily very good (even lj), but it has rich experience, so it has a good reputation. Domestic production, by the way, it should be said that mainland production is mainly due to experience. I recently read an article about the origin of headphones and found that many Japanese and even Malaysian ones are actually made in mainland China. The appropriate foreign-friendly sentiment has been hit, ^ _^. According to international trade laws, the place of packaging is the place of production, so many cunning manufacturers have resorted to tricks. After production, they go abroad and then come back, purely for our sake (Nissan's Pioneer is an exception). Among the recorders, even the most high-end civilian ones such as PX712/716/755/760 are made in China (the design is Japanese), and there are even more OEMs in Taiwan (also considered domestic). It is really not mature to look at the place of origin alone. , on the contrary, foreign forums are quite open to Made in China. By the way, a slight correction is that some manufacturers have several factories corresponding to different sales regions. Generally speaking, the ones in Malaysia are similar to those in mainland China (don’t believe the nonsense about using Japanese original factory standards), but there are a few manufacturers that do. Those made in Japan seem to use better materials than those made in Malaysia (hearsay), and the standards are stricter than those made in China, but they are generally only sold to Europe and the United States, and may not be available in Taiwan.
Generally there is no compatibility issue, don’t worry about this
Don’t use Japanese or Samsung discs. Once, a classmate used a Samsung disc to fly out after opening the cover. It was so scary. And the noise is extremely loud. In fact, when buying an optical drive, you first need to look at the error correction rate, and secondly, the noise, and pay attention to environmental protection. I recommend several super powerful optical drives:
Apache Black Pearl Ultra-Thin Combo BP12T
p>Patriot DW-F161
Litexing LH-18A1P