Differences between hard disk and DVD players

Hard disk player search feature allows you to quickly find what you want to play and will save you a lot of time. Wherever used, it is very convenient and flexible enough to play the files.

DVD player bulky and inconvenient to carry. But the smart HDD media player just as hard driver. You can use it to enjoy at home or in the office.

DVD player may be damaged because of frequent playing. The hard disk player for a long life because of the long life of hard disk, and you are free to use and not have to worry about anything.

DVD players must buy discs. But the HDD Player plays video files can be downloaded from the network with no money. What's more you can watch the movies on your monitor or TV screen.

to store the movies that you love forever, and you can delete what you do not want to store. Here you can enter the new films of the time. Even if the 40-episode TV series, you can put it on the HDD media player easily. So you can watch exciting movies at any time, wherever they went.

HDD player is recording capability. The record television programs, what you want to save it. However, you can connect the camera kind, including wired and wireless cameras. And the price is 60% less than the price of a video recorder. The media player supports not only RM, RMVB formats but MKV, FLV, H264 format.

At present, several media players connect to the hard drive. You must connect the hard drive media player when playing. It is necessary to carry out each of the media players and mobile hard drives, if you.

Hard disk player also supports SD cards and other types of community cards. It is possible to play the recorded files that you have recorded your digital camera. So you can watch the party scene, or the birthday pictures on the TV later on. What a pleasant thing!

Moreover, hard disk player has all the features of the mobile hard disk.

The way the video files on your media player is very simple. Here, you can enter them in a CD-ROM or on the computer's hard drive. You can go to bars or Internet computer companies copy the video files to the player. Many video stores now engaged in the business of copying video files. Because of the support of the hard disk player, it helped the video store, the more improvements.

Source by Willion Jone

What is the difference between a CD and DVD media?

Although the CD and DVD media the same size and shape, the similarity ends there. A number of points difference between the two is as follows:

Data pits and lasers

microscopic grooves on a disc to move in a spiral around the disc. Both CDs and DVDs these grooves. A laser beam is used to scan these grooves. As you may know, information is represented in digital ones and zeros. In these discs, very tiny reflective bumps (called & # 145; lands & # 146;) and non-reflective holes (called & # 145; pits & # 146;), grooves located along which reflect the ones and zeroes of digital information.

There is a difference & # 150; reducing the wavelength of the laser (the 780mm infrared light used in CD) to 625mm or more infrared light, DVD technology has been a smaller letter & # 145; pits & # 146; than a standard CD. This allows a greater amount of data per track. The minimum pit length of a single-layer DVD-RAM [http://computer-information.info] 0.4 microns, compared to 0.834 microns with a CD.

In addition, the DVD tracks are narrower, allowing for more tracks on one disc, which is again reversed more capacity than a CD.


as explained above, DVDs, small & # 145; & # 146 pits; and lasers need to focus on them. This is done by a plastic substrate thinner than the CD, which means that the laser to pass through a thinner layer of less depth to reach the pits. This is the reduction in thickness, which was responsible for the plates, which are only 0.6 mm thick & # 150; half that of a CD.

The data access speed

DVD access data much faster to do CDs. Here is a comparison of & # 150; a 32X CD-ROM drive reads data of 4M bytes per second while a 1X DVD drive reads 1.38 bytes per second. That & # 146; and even faster than an 8x CD drive!

UDF (Universal Data Format)

Recording formats of CDs and DVDs is quite different. The DVD's UDF (Universal Data Format [http://pda-devices.info]). This allows the data, video, audio or a combination of all three, to be stored in a single file structure. This has the advantage that any file can be accessed for any drive, computer or consumer video. CDs, however, are not compatible with this format.

Source by Logan Rokwild