Information Coding Schemes Group Member : Yvonne Tiffany Jurifah bt Junaidi Clara Jane George.

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Presentation transcript:

Information Coding Schemes Group Member : Yvonne Tiffany Jurifah bt Junaidi Clara Jane George

Definition :  The combination of 0s and 1s that represent characters are defined by pattern called “coding scheme.” What Are Coding Scheme? To map between binary codes and its corresponding alphanumeric characters. Provide the means to make it easier for human to interact with computer.

Coding System Used In Data Processing ASCII EBCDIC UNICODE

I. ASCII -American Standard Code for Information Interchange. -It encodes 128 specified characters into 8-bit binary integers. It defines 95 printable characters, including the space (which is considered an invisible graphic), and 32 non-printing control characters. Printable CharactersControl Characters -That does not represent a written symbol. -Use to control the peripherals such as printers. -Represent letters, digits, punctuation marks, and a few miscellaneous symbols. -There are 95 printable characters in total.

Types of ASCII Lower ASCII Originates from the older American systems. Works on 7-bit character table. Represents 0 to 128 values. Higher ASCII Characters are based on the language of your operating system or program you are using. Works 8-bit character table. Represents 128 to 255 values.

II. EBCDIC -Extended Binary Coded Decimal Interchange Code. -Is a binary code for alphabetic and numeric characters that IBM developed for its larger operating systems. -It is the code for text files that is used in IBM's OS/390 operating system for its S/390 servers. -In an EBCDIC file, each alphabetic or numeric character is represented with an 8-bit binary number possible characters are defined. -EBCDIC is a competing standards with ASCII. -ASCII and EBCDIC schemes assigns different characters to the number of binary code. CharacterDP3 EBCDIC ASCII

III. UNICODE -The Unicode is a character coding system designed to support the worldwide interchange, processing, and display of the written texts of the diverse languages and technical and mathematical of the modern world. In addition, it supports classical and historical texts of many written languages. -8 bits (UTF-8) -16 bits (UTF-16) -32 bits (UTF-32) Can represent up to 65,000 of characters and symbols. Has unique number code between U+0000 to U+10FFFF. Implemented in OS.

Differences Between ASCII, EBCDIC & UNICODE