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For example, writing to a CD at 8× will be twice as fast as writing onto a disc at 4×. [2] There are two main types of disc speed, which are the angular and linear velocities. If the disc spins at a constant angular velocity, the linear velocity is 2.4 times higher at the outer edge.
LaserDiscs, the first consumer optical discs, used constant linear velocity to double playback time (CLV / "extended play" discs can hold 1 hour per side; CAV / "standard play" discs can only hold 30 minutes). As the motor's speed decreases from 1,800 to 600 rpm when the read head moves away from the center (which is the start of the recording ...
Some high-speed CD and DVD drives can use CAV. [specify] It allows for shorter access times because the rotation speed (angular velocity) does not need to be changed when the laser seeks across the disc, similarly to the magnetic head of a hard disk drive. With a given angular (rotation) speed, the linear speed at the outermost track is nearly ...
A DVD player has to be able to read a DVD in ISO – UDF version 1.02 format, and needs to read and obey the DVDs Regional lockout codes and display a warning if the player is not authorized to play the DVD. To play a DVD smoothly, it needs to be able to decode the MPEG-2 video stream with a maximum bit rate of 10 Mbit/s at peak and 8 Mbit/s ...
A compressed audio optical disc, MP3 CD, or MP3 CD-ROM or MP3 DVD is an optical disc (usually a CD-R, CD-RW, DVD-R or DVD-RW) that contains digital audio in the MP3 file format. Discs are written in the " Yellow Book " standard data format (used for CD-ROMs and DVD-ROMs ), as opposed to the Red Book standard audio format (used for CD-DA audio CDs).
Slow computer fix #3: Update your browser and operating system If the browser on your kid's computer is out of date, it's possible for hackers to install malware on the device.
DVD recorder drives can be used in conjunction with DVD authoring software to create DVDs near or equal to commercial quality, and are also widely used for data backup and exchange. As a general rule, computer-based DVD recorders can also handle CD-R and CD-RW media; in fact, a number of standalone DVD recorders use drives designed for computers.
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