Available from the CD so far, been a few years before the project. Nowadays EVD, HDV, HVD, AudioDVD, H-DVD, DVD-ROM, MPEG4, VCD, CD, HDCD, MP3, WMA, JPG and so leaving the country flooded the market letters. Readers words: "Today, CD-ROM format and varied, leading the trend, I have the DVD, but I do not know whether the solutions of these formats. I do not understand, you should know, can the interpretation of the?" A modest in this: The boy unscented But knowledge is still there. Noted the development of the old news on the disc, analyze a variety of formats, respectively, of the explanation, and strive to "study in heaven and earth, through past to present, as his words." Haha, say a little show-off, but at least you carefully read through this long article I, at least not taken in the next street buying.
?? Note: CD-ROM 4 Xia is?? CD, DVD-5, DVD-9, and Blu-ray DVD
CD actually means "tray"
?? Like everyone eating out, although the point a lot of food, but Sheng Cai is with the plate, at best, the size of these plates, the pattern different. This disc is also a reason, it is merely a medium for recording digital files, film or music that is candy in the "plate." Moreover, this "plate" now (including computer software and
Game
CD-ROM) only two: CD and DVD. In the DVD which can be divided into DVD-5 and DVD-9 formats. No other disc format of the.
?? Who said that there VCD too! In fact, refers to a VCD is a video file of the CD installation disc. That is a shadow of the popular children's CD is the VCD. Okay, explain this in the back slowly. We start talking about the format of the disc.
??
?? CD
?? In the last century, the sixties and seventies, CD of digital information that can record a large number of civilian products are widely been used as alternatives to traditional record develop. This indentation in the plastic disc in the CD information layer of metal can often be stored for each information about 640M. 640M many friends on this concept has not, so to speak, whether text, photos, music or video can use the digital format. In the computer world, these things are "0" and "1" in the form of existence. They calculated the size of a few units: B (bytes), K, M (megabytes), G ... ... the relationship between them is the 1024B is equal to 1K, 1024K equal to 1M, 1024M equivalent to 1G.
If we make an analogy with the text, then a letter or a number in the computer to account for a byte, a character in 2 bytes. 1 640M of the CD used to store Chinese characters, if so, should be able to record (640 × 1024 × 1024) ÷ 2 = 335544320 Chinese characters. The equivalent of more than 300 "Dream of Red Mansions."
?? Of course, this can also be used to record CD, photos, music, video, or a variety of software. If recorded music is usually said that the CD recording; if recorded video, what we call the VCD or SVCD; if the record is only
Computer
Can read all kinds of software or graphic information that we often say that the software CD. In fact, these things are installed in the CD tray inside of this dish, the dish is exactly the same CD disc.
??
?? DVD
?? Once upon a time, "3 disc with release" of the VCD machine also had a burst of fire, however, available in DVD machine, the product disappeared. This is how it? I do not say you know: DVD disc will be able to put a complete an entire film, even a plate to put down several of the films, not-for-disc trouble, of course, not the "3 disc even put" and "trouble."
?? DVD discs and CD discs similar principle, but the capacity falls far short, however. A DVD-5 format disc can put down about 4.7G of data. CD disc is about 7.5 times. And a DVD-9 format DVD discs can put down some more than 8G of data, a CD disc capacity is about 13 times. The reason why the capacity of DVD-9 DVD-5 ratio was almost double major, because use of the single-sided DVD-9 layer or double-sided double-layer technology. The so-called single-sided double-layer DVD disc or from the side that is read, but the information layer is layer 2, DVD machines by adjusting the laser wavelength to read the two messages were a layer of information. The name implies that is double-sided double-layer, DVD information can be read on both sides, this is like the one posted back to back with the two DVD-5, and twice as large capacity natural. I am an expert from China Manufacturers, usually analyzes all kind of industries situation, such as brooch crystal , pearl brooch.
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