DVD recording speed : Currently, the highest DVD recording speed in the market is 16x. For 2 to 4x recording speed, the data transfer rate is 2.76M to 5.52MB per second. Burn a 4.7GB DVD disc. It took about 15 to 27 minutes for the film, and 7 to 8 minutes for the 8 speed recording. It was only a bit slower than burning a CD-R, but considering the amount of data it burned, the recording speed was 8 times faster. It has reached a very high level. DVD burning speed is the primary factor in buying DVD recorders. If you have sufficient funds, choose a DVD player that is as fast as possible. CD reading speed : The maximum CD reading speed means that the optical storage product can reach the maximum optical drive speed when reading a CD-ROM. Because it is for CD-ROM discs, the speed is nominally the CD-ROM speed, not the double speed nominal of the DVD-ROM. At present, the maximum CD reading speed that a CD-ROM can achieve is 56 times faster; DVD-ROM reads CD-ROM speeds slightly lower; 52 times faster products are still relatively few, most of which are 48 times faster; COMBO products basically Both have reached 52 times speed. The theoretical data transfer rate for a 50x speed CD-ROM drive should be: 150 x 50 = 7500 kbytes/sec. In fact, the difference between the speed of the optical drive reading disk is not very important. This is because it is no longer a drag on the computer system. Moreover, the current high speed optical drive's nominal value is only the highest speed in the ideal case to read the outer ring, the actual application is generally 24 speed look. Therefore, whether the 36-speed, 40-speed or 50-speed optical drive, the actual use of subjective feeling is not very different. DVD read speed : The maximum DVD read speed refers to the maximum optical drive speed at which the optical storage product can read a DVD-ROM. The speed is defined by the DVD-ROM speed. At present, the maximum DVD reading speed that a DVD-ROM drive can achieve is 16 times faster; the maximum DVD reading speed that a DVD recorder can achieve is 12 times faster, and it is believed that a 16-times speed product will be introduced soon; currently a commercial COMBO The maximum DVD reading speed supported by the product is mainly 8x and 16x. CD copying speed : CD copying speed refers to the maximum recording speed when the recorder is burning a CD-RW disc and data is stored on the disc, and the data is erased and new data is burned. Faster CD-RW recorders can achieve up to 32x speeds when rewriting CD-RW discs. Although DVD recorders also support writing to CD-RW discs, the general CD writing speed is slightly lower than that of CD-RW recorders. Only individual products can achieve 32x speed. COMBO products have performed well in CD-RW replication. Currently, the products on the market can basically reach the level of 24 times speed, and some products have reached 32 times speed. DVD rewrite speed : DVD rewrite speed refers to the maximum burning speed of a DVD recorder that burns DVDs of the corresponding specifications and records data on the optical disc. At present, the maximum DVD playback speed that can be achieved in various standard DVD recorders is 4 times speed, which is about 5.4 MB/s per second.
Optical drive speed
CD recording speed : CD recording speed refers to the maximum CD-R recording speed supported by the optical storage product. At present, the mainstream mainstream CD-RW products can achieve the 52-speed recording speed, as well as some 40-times and 48-times speeds. In the actual work, they are affected by factors such as the performance of the host. Not disparity. At 52x, this is basically close to the limit of a CD-RW burner and it is difficult to improve it. The speed of the products on the external CD-RW recorder is quite different. There are 8x, 24x, 40x, 48x, and 52x speeds. Generally, the external dimensions are compact, and the recording speed of the products with emphasis on portability is generally higher. Low level. On the other hand, the relatively bulky external CD-RW recorders always maintain a higher recording speed, even with the built-in type.