What is a Compact Disc Recorder?

Optical disc recorder is a kind of data writing device. It uses laser to write data to empty discs to realize data storage. The writing process can be seen as the reverse process of reading an optical disc by an ordinary optical drive.

CD burner

When engraving data, the high-power laser beam is reflected to the disc to make changes on the disc, and the binary data 0 and 1 are simulated.

CD +/- R (CD +/- Recordable)

CD-R uses write-once technology. When data is engraved, the high-power laser beam is reflected to the CD-R disc, which chemically changes the dielectric layer on the disc, simulating the difference between binary data 0 and 1, and the data Properly stored on CD-ROM, it can be read and used by almost all CD-ROMs. Due to the qualitative changes caused by chemical changes, disc data can no longer free up space and be rewritten.

CD +/- RW (CD +/- ReWritable)

CD-RW uses advanced Phase Change technology. When writing data, a high-power laser beam is reflected to the special medium of the CD-RW disc, producing both crystalline and non-crystalline states, and irradiated by the laser beam. The dielectric layer can switch between these two states to achieve the purpose of repeated writing multiple times. More precisely, CD-RW should be called rewritable

Reading and writing speed

The main technical indicators that mark the performance of a disc burner, including the data read and transfer rate and the data write speed. The faster the theoretically, the better the performance. The read speed is much lower. Taking CD-R as an example, the current highest reading speed can reach a maximum of 24 times, or even higher, but users will not intentionally use the recorder as a CD-ROM. The actual effect of this indicator is not obvious . The writing speed is usually only 2 speeds, 4 speeds, 6 speeds, 8 speeds, etc. The higher the speed, the less the writing time. The advantages are obvious, but the actual reasons Limitation, high-speed writing speed is likely to cause "flying disc" phenomenon, resulting in burning failure. The erasing speed of a CD-RW recorder can also explain this. At present, its erasing speed is usually only 2 and 4 speeds, but it can be restarted if it is damaged. Therefore, when buying a recorder, you don't need to deliberately pursue its high writing speed. Based on the consideration of scalability and stability, high-speed reading of 4-speed write or 2-speed and 4-speed rewritable CD-RW products should be the first choice.

Interface method

There are generally three types of optical disc burner interfaces: SCSI, IDE, and parallel. The SCSI interface is better than the other two interfaces in terms of CPU resource occupation and data transmission stability. The impact of the system and software on the burning process is much lower, so its burning quality is the best. However, the cost of a SCSI interface burner is high, and a SCSI interface card must be purchased separately, which also increases the cost. IDE interface burner is lower in price and better compatible, so you can use the motherboard easily.

The world's first DVD disc burner

Blu-ray camp

Supported by Sony, Panasonic, and Dell.

HD-DVD camp

Supported by Toshiba and NEC, Microsoft and others have also joined.

Difference between the two camps

The two formats have different ways of writing information. The protective layer of the Blu-ray Disc format is 0.1mm, and that of HD DVD is 0.6mm. If Blu-ray Discs are to be produced, the production line will inevitably be restructured, and the manufacturing costs will be higher in the short term.

Possible fusion

Negotiations on the integration of Sony's Blu-ray DVD and Toshiba's HD-DVD standard have failed, which has slowed the progress of Blu-ray DVD's challenge to China's DVD to some extent. Toshiba stated for the first time that Sony's failure to provide relevant technical data was the main reason for the breakdown of the negotiations.

EVD

The EVD's pixels are nearly five times larger than DVDs, and it can receive digital TV programs; it has a unique "rewritable function." At the end of 2001, EVD passed the technical appraisal of the Ministry of Information Industry, which was developed by Fuguo Electronics.

Autonomous DVD format based on HD-DVD standard

Based on the HD-DVD standard, the thickness of the recording layer is 0.6 mm, the physical layer is slightly changed, and the video application layer is simplified. Not compatible with HD-DVD. With sharper images, higher quality audio, larger capacity, and more effective copyright protection. In development. Proposed by the National Engineering Center of the CD-ROM.

HDV

HDV is a high-tech product with independent intellectual property rights developed by Zhongguancun High-tech Enterprise Kaicheng High-definition Electronic Technology Company.