Optic disk (CD)

Optic disk (CD)

Оптик дискэн дээрх мэдээллийг лазерийн гэрлийн тусламжтайгаар уншиж бичдэг. Оптик дискэнд CD-ROM, CD-Recordable, CD-ReWritable, WORM диск нар орно.

CD-ROM (Compact Disk- Read Only Memory)
CD-ROM нь компакт дискэн дээр бичигдэж ирсэн график дүрс, текст, дууг зөвхөн уншихаас ямар нэг юм бичих боломжгүй. Дууны CD -гээс дууг зөвхөн сонсохоос, дуу нэмж бичих боломжгүй байдаг. Сүүлийн үеийн бүх компьютерүүд CD-ROM төхөөрөмжтэй ирдэг.CDROM-ын компакт дискийг унших хурд нь 1x, 2x, 4x, 8x, 16x, 32x, 40x, 50x зэрэг байдаг.
1х гэдэг нь өгөгдөлд хандах хурд нь секундэд 150 килобайт юм.
2х нь секундэд 300 килобайт, 4х – 600Kb гэх мэт.

Компакт диск нь 120 мм-н диаметртэй байдаг. Нэг компакт диск нь 72 минутын стерео дуу хадгалдаг. Компакт дискний мэдээлэл хадгалах хэмжээ нь 650 Mb бөгөөд энэ нь 250000 хуудас текст эсвэл 7000 фото зураг, дүрс багтах боломжтой юм.
Компакт диск нь асар их хэмжээний мэдээллийг хадгалах чухал хэрэгсэл болсон. Зөвхөн дууны CD-ч биш, текст,зураг, атлас, хөдөлгөөнт зураг, видео зэргийг агуулсан танин мэдэхүйн нэвтэрхий толь, гадаад хэл сурах CD (англи, герман хэл сурах г.м), тоглоомын болон ном сэтгүүлүүдийг CD дээр бичиж гаргахаас гадна видео киног ч бичсэн байдаг.


CD-R (Compact Disk – Recordable)
өгөгдөл, дуу, видео зэргийг бичихэд зориулсан форматтай ирдэг энэ компакт дискийг ердийн CD-ROM төхөөрөмж унших боломжтой. Фото зураг боловсруулдаг чанараараа дэлхийд дээгүүрт ордог Кодак компани нь Photo CD гэсэн технологийг гаргасан. Энэ нь ердийн зургын аппаратаар авсан зургын хальсыг тусгай зориулалтын сканераар татан авч CD-ROМ дискэн дээр хуулж бичдэг байна. Энэ компакт диск дээрх зургуудийг CD-ROM бүхий компьютерээс харж болохоос гадна компьютергүй хүн Кодакийн Photo CD тоглуулагчийг телевизэд залган телевизээр харж болдог юм байна.

WORM disk (Write Once, Read Many disk)
Энэ дискэнд мэдээллийг зөвхөн нэг л удаа бичдэг. Харин мэдээллийг дискнээс хэдэн ч удаа уншиж болно. үүнийг мэдээлэл хадгалах зориулалттай ашигладаг.

CD-RW (Compact Disk – ReWritable)
Энэ дискэн дээрх мэдээллийг арилгаад ахиж хуулж болдог. Энэ технологийг Erasable Optical Disk гэж нэрлэдэг. Урьд нь бичиж хадгалсан материалаа шинэчилсний дараа эргээд хуулж хадгалах шаардлагатай хүмүүст зориулсан.

Date: September 19th, 2007 | Categories: Компьютер | By: | Comments: 1,135

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