Term
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Definition
| An optical disc technology that uses the UDF version 2.5 file system and a blue laser beam, which is shorter than any red beam used by DVD or CD discs. The shorter blue laser beam allows Blu-ray discs to store more data than a DVD. |
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Term
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Definition
| See media reader. A device that provides slots for memory cards and can be an internal or external device. Also called a card reader or memory card reader/writer. |
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Term
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Definition
| An optical disc technology that uses a red laser beam and can hold up to 700 MB of data. |
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Term
| CDFS (Compact Disc File System) |
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Definition
| The 32-bit file system for CD discs and some CD-R and CD-RW discs. See also Universal Disk Format (UDF). |
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Term
| constant linear velocity (CLV) |
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Definition
| A CD-ROM format in which the spacing of data is consistent on the CD, but the speed of the disc varies depending on whether the data being read is near the center or the edge of the disc. |
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Term
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Definition
| A type of tape medium typically used for backups. Full-sized data cartridges are 4 x 6 x1/2 inches in size. A minicartridge is only 3 x 2 x3/5 inches. |
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Term
| DVD (digital versatile disc or digital video disc) |
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Definition
| A technology used by optical discs that uses a red laser beam and can hold up to 17 GB of data. |
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Term
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Definition
| The time it takes for the strength of a storage media to weaken by half. Also called life expectancy or shelf life. |
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Term
| JPEG (Joint Photographic Experts Group) |
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Definition
| A graphical compression scheme that allows the user to control the amount of data that is averaged and sacrificed as file size is reduced. It is a common Internet file format. Most JPEG files have a .jpg extension. |
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Term
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Definition
Microscopic flat areas on the surface of a CD
or DVD that separate pits. Lands and pits are used to represent data on the disk. |
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Term
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Definition
| A device that provides slots for memory cards and can be an internal or external device. Also called a card reader or memory card reader/writer. |
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Term
| memory card reader/writer |
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Definition
| See media reader. A device that provides slots for memory cards and can be an internal or external device. Also called a card reader or memory card reader/writer. |
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Term
| MIDI (musical instrument digital interface) |
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Definition
| A set of standards that are used to represent music in digital form. A MIDI port is a 5-pin DIN port that looks like a keyboard port, only larger. |
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Term
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Definition
| A tape drive cartridge that is only 3 1/4 x 2 1/2 x 3/5 inches. It is small enough to allow two drives to fit into a standard 5 1/5-inch drive bay of a PC case. |
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Term
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Definition
| A method to compress audio files that uses MPEG level 1. It can reduce sound files as low as a 1:24 ratio without losing much sound quality. |
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Term
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Definition
| Recessed areas on the surface of a CD or DVD, separating lands, or flat areas. Lands and pits are used to represent data on a disc. |
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Term
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Definition
| A method of data access used by tape drives, whereby data is written or read sequentially from the beginning to the end of the tape or until the desired data is found. |
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Term
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Definition
| A sound compression standard that supports up to 10 different speakers, each producing a different sound. Also known Dolby AC-3, Dolby Digital Surround, or Dolby Surround Sound. |
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Term
| TIFF (tagged image file format) |
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Definition
| A bitmapped file format used to hold photographs, graphics, and screen captures. TIFF files can be rather large, and have a .tif file extension. |
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Term
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Definition
| An adapter card that receives a TV signal and displays TV on the computer screen. |
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Term
| UDF (Universal Disk Format) file system |
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Definition
| See Universal Disk Format (UDF) file system. A file system for optical media used by all DVD discs and some CD-R and CD-RW discs. |
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Term
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Definition
| An adapter card that captures video input and saves it to a file on the hard drive. |
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