CD tips !!

1. Cd (compact disk)
CD has been in the market for more than 20 years. It began in October 1982. The practice over the years has proved that CD is a large and reliable music distribution medium, and can also record other information.

The music CD format is "CD audio (cdaudio)", which records up to 80 minutes of digital music. Redbook defines its specifications. The Yellow Book (yellowbook), released in 1984, sets the specification for a CD-ROM so that CD can be used to store computer data.

CD-ROM (compact disc-read only memory)
It is a type of optical disc, and its storage capacity can reach 680 MB.
The CD-ROM requires a dedicated device to record the data, and a new data cannot be cleared or added once written. To read the information on the disc, you need a CD-ROM Optical Drive. Almost all CD-ROM are in accordance with the standard size and format, so usually on the CD-ROM any format of data can be read. In addition, most of the CD-ROM drive also has the ability to play music disc.

2. VCD
VCD is short for video compact disk, which is a compressed image format. It uses the compression method of MPEG-1 to compress the image, the resolution reaches 352*240 (NTSC) or 352*288 (PAL) 1.15 Mb/s video bit rate, the sound format uses 44.1khz sampling frequency, 16-bit sampling value, stereo (before compression, the audio format is CD sound quality, that is, the sound quality of the music CD we often listen .) The compression method for MPEG-1 Layer 2, 224kb/s audio bite rate. With this compression method, after being restored to the music CD format, even trained professional auditionists cannot tell the difference in sound quality from the original CD. That is to say, this compression method is a non-destructive compression.

3. DVD
The full English name of a DVD is digital video disc, which is a digital video disc or digital photo disk. It uses MPEG2 compression technology to store images. It is also called digital versatile disk, which is a digital multi-purpose disc. It integrates computer technology, optical recording technology, and film and television technology, its purpose is to meet people's needs for large storage capacity and high-performance storage media.

4. CD-R
CD-R is short for CD recordable. A disc is a type of media that can be written at a time and read multiple times. It can be used as a standard disc. Compared with other media, CD-R has the advantage that it can be played and used by a general standard type optical disc machine. The disadvantage is that you cannot re-write it.

5. CD-RW
The so-called CD-RW, short for CD-rewritable, is a Rewritable technology, and the product that applies this technology on the disc recorder is called CD-RW. While the CD-RW used in the burning disc is also known as the CD-RW disc. In addition to the ability to burn CD-RW recorder disc, of course also has forward integration function, that is to say, burner can also burn General CD-R disc.