What is a Recordable DVD-R?

The full name of DVD-R is DVD-Recordable (recordable DVD). In order to distinguish it from DVD + R in the industry, it is defined as Write once DVD. DVD-R / RW is the pioneering DVD burning format and is supported by Toshiba, Hitachi, NEC, Samsung and the DVD Forum. However, unlike CD-R, there are currently two types of DVD-R, namely Authoring and General. The main physical difference between the two is the wavelength of the recording laser, so they need their own dedicated recorders to write to them. But as long as the burning is completed, it can be played on a traditional DVD player.

DVD-R

The full name of DVD-R is DVD-Recordable (recordable DVD). In order to distinguish it from DVD + R in the industry, it is defined as Write once DVD.

Why are there two types of DVD-R? In fact, in its era (1997), only those professionals who could use DVD-R for video recording, for example, video producers often backed up video images from a linear digital video master tape (DLT), or It is used as a backup of video recordings in medical, exploration, banking and other fields. Therefore, the writer-type DVD-R at that time mainly served them. Three years later, the DVD Forum valued the development of broadband technology, thinking that it would be the forerunner of the era of personal DVD burning, so it developed a universal DVD-R standard based on the author-type DVD-R Ver2.0 (the initial version was 2.0). In other words, writer-type DVD-R is targeted at the professional application market, while general-purpose DVD-R is targeted at the general civilian market.

Like traditional CD-R, DVD-R only uses groove tracks for recording, and this groove is also modulated by a custom frequency signal into a "jitter" shape, called a wobble groove (Wobble Groove). Role and

Since DVD-R / RW has the same physical format as DVD-ROM, compatibility is better. Even the earliest DVD-ROM drives can recognize the data, and DVD-R / RW is also compatible with most home DVD recorders. It should be noted that DVD-R / RW discs provide two video modes: one is a video recording mode that is not compatible with a DVD player; the other is a DVD video mode that can be played on a DVD player. Need to pay attention to the distinction. In contrast, although most DVD drives and some players were recognized in 2007,

In the domestic market in 2013, DVD-R, DVD + R, DVD-RW, DVD + RW, DVD-R DL,

DVD +/- R DL is a single-sided single-layer single-layer double-layer recording (DVD +/- Recordable Double layer) relative to 4.7G, with two storage layers, compared with ordinary single-sided single-layer recording disk storage capacity Expanded to 8.5G, but due to technical problems, not many manufacturers produce such discs. Probably cheap discs are around ten yuan. It is also called DVD-9.