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Information and Communication Technology 3.5 Character Coding System

This article explores character coding systems, focusing on the American Standard Code for Information Interchange (ASCII) and Chinese character encoding systems like Big5, GB, and Unicode. ASCII is a common 7-bit coding system representing 128 characters, including letters, digits, and symbols. In contrast, Chinese encoding often uses two bytes (16 bits) to represent various characters, with Big5 supporting traditional Chinese and GB for simplified Chinese. Unicode is highlighted as a universal standard accommodating all existing languages worldwide, ensuring effective global communication.

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Information and Communication Technology 3.5 Character Coding System

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  1. Information and Communication Technology3.5 Character Coding System Ho Cheuk In S4A (21)

  2. American Standard Code for Information Interchange (ASCII) • Common character coding system • Each code represents either a printable character or a non-printable character • Each character consists of 7 bits, it contain 128 different characters • Include small and capital letters, digits and graphics symbols

  3. Example

  4. Solution

  5. Chinese Character Coding System • Usually represented in Big5 code, Guo Biao(GB)code and Unicode

  6. Big5 code & GB code • Both are use two bytes (16 bits) • Use different codes to represent the same Chinese characters • Big5 – traditional Chinese popular in Hong Kong, Macau and Taiwan • GB – simplified Chinese Example

  7. Unicode • Represent all the existing languages in the world • International standard code

  8. Example

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