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- Constant_linear_velocity abstract "In optical storage, constant linear velocity (CLV) is a qualifier for the rated speed of an optical disc drive, and may also be applied to the writing speed of recordable discs. CLV implies that the angular velocity (i.e. rpm) varies during an operation, as contrasted with CAV modes. The concept of constant linear velocity was patented in 1886 by phonograph pioneers Chichester Bell and Charles Tainter.Laserdiscs, the first consumer optical discs, used constant linear velocity to double playback time (CLV disc can hold 1 hour per side; CAV disc only 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), the disc constantly moves past the read head at 18.96 metres per second (m/s, 62.2 ft/s).Later optical formats such as the audio CD also employ CLV to maintain both a constant data rate and a constant bit density. Their rotation gradually decreases from 495 to 212 rpm to keep the disc moving past the read laser at 1.2 m/s (3.9 ft/s).To accommodate the higher data transfer rates and random access requirements of modern CD-ROM drives, CAV systems are used. This is because seek performance would be greatly affected during random access by the requirement to continually modulate the disc's rotation speed to be appropriate for the read head's position.".
- Constant_linear_velocity thumbnail Comparison_disk_storage.svg?width=300.
- Constant_linear_velocity wikiPageID "1246864".
- Constant_linear_velocity wikiPageRevisionID "592262732".
- Constant_linear_velocity hasPhotoCollection Constant_linear_velocity.
- Constant_linear_velocity subject Category:Audio_storage.
- Constant_linear_velocity subject Category:Optical_computer_storage.
- Constant_linear_velocity subject Category:Rotating_disc_computer_storage_media.
- Constant_linear_velocity subject Category:Video_storage.
- Constant_linear_velocity type Artifact100021939.
- Constant_linear_velocity type Instrumentality103575240.
- Constant_linear_velocity type Medium106254669.
- Constant_linear_velocity type Object100002684.
- Constant_linear_velocity type PhysicalEntity100001930.
- Constant_linear_velocity type RotatingDiscComputerStorageMedia.
- Constant_linear_velocity type StorageMedium106263762.
- Constant_linear_velocity type Whole100003553.
- Constant_linear_velocity comment "In optical storage, constant linear velocity (CLV) is a qualifier for the rated speed of an optical disc drive, and may also be applied to the writing speed of recordable discs. CLV implies that the angular velocity (i.e. rpm) varies during an operation, as contrasted with CAV modes.".
- Constant_linear_velocity label "CLV".
- Constant_linear_velocity label "CLV".
- Constant_linear_velocity label "Constant linear velocity".
- Constant_linear_velocity sameAs CLV.
- Constant_linear_velocity sameAs CLV.
- Constant_linear_velocity sameAs m.04lvyd.
- Constant_linear_velocity sameAs Q5163660.
- Constant_linear_velocity sameAs Q5163660.
- Constant_linear_velocity sameAs Constant_linear_velocity.
- Constant_linear_velocity wasDerivedFrom Constant_linear_velocity?oldid=592262732.
- Constant_linear_velocity depiction Comparison_disk_storage.svg.
- Constant_linear_velocity isPrimaryTopicOf Constant_linear_velocity.
