lesson28digitalstoragemedia电子技术专 业英语教程.ppt

Unit10 Digital Multimedia Systems
Lesson 28 Digital Storage Media
《电子技术专业英语教程》冯新宇主编
电子工业出版社
2018/10/4
《电子技术专业英语教程》
2
28 Digital Storage Media
Backgrounds
Text tour
Language in use
Vocabulary
Structure
Reading/writing techniques
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《电子技术专业英语教程》
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Terminology
fiber-optic 【计】光导纤维
servo ,伺服系统;【计】伺服装置
Hypermedia 【计】多介质的,超媒体
CD-DA pact-disc 激光唱片,压缩磁盘,光盘
CD-ROM 只读存储器,只读光盘
Fiber Distributed Data Interface 光纤分布式数据接口
seek time 寻道时间
orders of magnitude 数量级
Backgrounds
2018/10/4
《电子技术专业英语教程》
4
Text tour
Outline
- What is digital storage media?
- Storage
CDROM
CDROM development
- Network
Why should the introduction work storage?
The realization worked storage
2018/10/4
《电子技术专业英语教程》
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What is digital storage media?
"digital storage media" refers to both storage munication capabilities
These have increased in capacity more than a thousand fold in the past decade, allowing digital multimedia to emerge as a cost petitor for analog approaches.
In 1985, CD-ROM (compact disc read-only memory) with a capacity of more than 600 Mbytes but a manufactured cost under a dollar was first applied to electronic publishing. Similarly, fiber-optic cable now makes gigabit-per-munication channels a reality worldwide.
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《电子技术专业英语教程》
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CD-ROM
CD-ROMs, the most cost effective storage medium for distributing large quantities of digital data, are related to pact discs-that is, CD-DA, pact-disc digital audio.
Both support direct access to individual sectors of data that can store 1/75 second of CD-quality digital audio in CD-DA format, using 2,336 bytes, or 2,048 bytes of arbitrary digital data in CD-ROM format with the rest of the space for error correction. Thus, CD-ROM data transfer speed is 150 Kbytes per second or Mbits per second.
2018/10/4
《电子技术专业英语教程》
7
CDROM development
An elaborate system of optics, servos, and signal decoding circuits allows data to be accessed within a second. ISO 9660 (based on the High Sierra standard ) specif