The history of DVD

A brief history of DVD product development

DVD-ROM drive: It is a kind of computer peripheral that needs to be connected to read data, but the speed of reading data is faster than that of ordinary optical drive, and its development is similar to that of optical drive. 1 double speed DVD-ROM appeared at the end of 1996, but it was less than 1 year, and double speed DVD-ROM became the mainstream. Soon, quadruple speed also became popular, but a few months later, the limelight was overshadowed by 6 to 8 times speed.

With the popularity of DVD-ROM, the reading function of CD-R has become the mainstream of computer storage, which further promotes the development of DVD-R/ RAM. In addition, the development of DVD-ROM drive not only improves the speed, but also makes it slimmer. Because of the rapid development of notebook computers, this is another big market for DVD-ROM.

DVD player: This is a playback device connected to the TV. A 4.7GB DVD-Video can play movies of 133 to 135 minutes. At present, most DVD players have the function of playing CD music and VCD movies, while the second generation models consider the function of reading CD-R/ RW discs.

DVD Audio Player: 1999 At the beginning, the specifications of DVD audio have been completely formulated, which is the format of advanced music, especially? Heavy sound effect; It is great news for senior audio enthusiasts. Therefore, when the DVD audio disc is officially listed, the popular CD player will be gradually replaced, because the DVD audio player will be able to read the CD music disc. In addition, it will also have the function of reading CD-R discs.

DVD-R: It can be said that it is an extension of CD-R. At present, the popular CD-R can only burn 1 disc with a capacity of 650MB. The first generation of DVD-R appeared in 1997, but its specification was 3.95GB/ surface, which was less than 4.7GB/ surface.

However, when discussing the specification of DVD forum, some differences appeared. Finally, under the compromise of both parties, it was agreed that Pioneer Japan would take the lead in launching the first-generation DVD-R optical drive and CD-ROM at the end of the same year. In order to match the recordable capacity of DVD-R to 4.7GB, the DVD forum has actively held a meeting to discuss the second generation DVD-R specification with a recordable capacity of 4.7GB/ surface. By May of 1999, the second generation DVD-R specification was finally completed.

DVD-RAM/ RW: this is the next generation CD-RW. As early as 1997, the first generation DVD-RAM was 2.6GB/ plane, but its capacity was far from 4.7GB/ plane. In the same year, Philips, Sony and HP jointly released 3.0GB PC+RW(DVD+RW), but it also caused an unpleasant situation in the DVD forum. However, it accelerates the specification of 4.7GB/ face DVD-RAM. Finally, the specification of DVD-RAM (version 2.0) was finalized in May 1999.

In addition, the DVD forum also considered the practicality of using grooves to burn DVD-RW, and also included 4.7GB DVD-RW in the discussion of the working group. At the same time, the pioneer of DVD-RW specification also actively advocates the application of DVD-RW in consumer electronic products. Therefore, from the compatibility between DVD-RW and existing DVD-ROM/ Video, the application specification of DVD-RW should be accepted. Therefore, DVD-RW and DVD-RAM will both appear in the specifications of DVD forums. The latter will have the advantage of fast access through connected computers, while the former has the advantage of compatibility in consumer electronics applications.

Although the storage capacity of CD-RW is as high as 800MB, it is still not as attractive as the 4.7GB capacity of DVD-RAM drive. Moreover, as long as they are loaded into a personal computer, they can be easily recorded, edited and copied. See if 200 1 will be the world of DVD. At present, only the combustion specifications have not been determined, but I believe an agreement will be reached soon. At the same time, when home DVD-RW appears, TV video recorder will be completely replaced, and people will begin to enter the real multimedia era.

When it comes to the origin of DVD, we can't help but mention Sony and Philips. Since 198 1 published the optical disc standard, the two companies have continuously introduced different optical disc formats for many years, which directly and indirectly led to the emergence of DVD.

1September, 1994, Pioneer first released the DVD video with the same capacity as CD but 8 times larger than CD, which is the first DVD format appearing in the market. A few months later, more and more companies launched DVDs, and the format of DVDs began to differentiate. On the one hand, there are MMCD formats from Sony and Philips, and the capacity of this format is 3 GB per side. As for the other format, it is the SD format jointly advocated by many companies. After months of meetings, a unified DVD standard was finally formulated in May 1995, and the name of DVD was established as digital versatile disk.

Development history of CD→ DVD

198 1 year: optical disc specifications and standards initiated by Sony and Philips.

1982: Sony launched the world's first CD player CDP-1kloc-0/and the world's first CD- Billy Chow's S52 nd Street.

1984: Sony launches the world's first portable CD player.

1985: Sony and Philips also announced the CD format available for computers.

1989: the sales of CDs in the United States exceeded 25 million, and the first batch of double-speed CDs were officially listed at the same time.

1990: Sony and Philips publish CD-R specifications.

1994: CD has officially become the standard for personal computers.

1995: DVD standard officially announced.

1996: The standard of DVD is officially confirmed.

1997: The first DVD players in the world were officially launched, and more than 500 films were released at the same time.

1998: The first batch of DVD-ROM in the world were officially applied to some high-end computers. . . . . .

Maybe 10 years ago, no one thought about what a DVD was. Up to now, most people's impression of DVD is still in the stage of high-quality movies and fun. In fact, the development space of DVD is not that small. On the contrary, with its technology and amazing data storage capacity, it has great potential to replace all computer storage media and become the new storage standard of the next generation.

Although there are still many differences among manufacturers on DVD format (especially recordable DVD), the users will ultimately benefit. In fact, DVD has many advantages that traditional CD can't compare with, besides its large capacity. DVD has larger capacity and faster running speed than CD (the CD reading speed of DVD-ROM can generally reach 18-24 times), which has become a widely accepted standard. An ordinary DVD can store more than 4.7GB of data; Some can even reach 17GB, which is 30 times that of traditional CDs.

Because DVD uses Dolby loopback stereo system to handle all movie sound effects, it can handle digital analog and stereo at the same time, including 5. 1 MPEG-2 multi-channel and Dolby (now unified as Dolby 5. 1), and has bass effect, making it the first choice for high-demand users. In addition, DVD can provide up to 8 languages and 32 subtitles at a time.

DVD can provide more perfect audio-visual enjoyment than CD and VCD. Even the earliest released DVD video can store 135-minute MPEG-2 movies on a single layer. If you use two-tier storage, you can also store 24 1 minute movies at a time. The screen resolution exceeds 500 lines, and the picture quality is better than any broadcast media including CD LD and VCD.

DVD supports different screen vertical and horizontal playback ratios, so besides the traditional 4:3 ratio, it can also play widescreen movies with the ratio of 16:9. In addition, DVD allows users to watch the same group of movies from multiple angles (up to 9 movies), giving users a brand-new feeling about movies. For example, when watching a DVD with wonderful game process, you can watch the game from different lens angles.

Most DVD movies store information related to the movie, such as the titles and scenes (usually called chapters) of various parts of the movie. Just press the search function, you can quickly jump to the scenes and clips you want to see. If you don't want your children to see bad content, you can use a special parental lock function to prevent them from opening and playing DVD without authorization.

DVD can provide perfect menu function. Whether you use DVD-ROM on your computer or DVD player at home, you can also select your favorite pictures instantly through the perfect system menu function.