Character encoding standard(1)
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This document discusses character encoding systems used to represent textual data in computing. It describes several character encoding standards including ASCII, EBCDIC, ISO 646, ISO 885, and UTF-16. ASCII is a 7-bit encoding that can represent 128 characters and was limited as it does not support languages with large character sets. EBCDIC is an 8-bit encoding mainly used on IBM mainframe computers. UTF-16 is a 16-bit Unicode encoding that can represent over 65,000 characters and supports representation of text in many languages.
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The document discusses different coding schemes used in data processing, including ASCII, EBCDIC, and Unicode. ASCII uses 8 bits to represent characters and can represent 256 characters, while EBCDIC is traditionally used on mainframe computers. Unicode uses 16 or 32 bits and can represent over 65,000 characters to support different languages.
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Unicode is an alternative character encoding standard to ASCII that can represent many more characters and languages. It was originally a 16-bit encoding that could represent around 7,000 characters, but now uses 8, 16, or 32 bits per character, allowing it to encode over 137,000 characters in the current version. While Unicode supports more languages by encoding more symbols, it also uses more computer memory than ASCII to store each character.
Encodings - Ruby 1.8 and Ruby 1.9
This document summarizes encodings in computing, including ASCII, ISO-8859, Unicode, and how they are handled in Ruby 1.8 and 1.9. It discusses that text encoding and content are separate concepts and recommends using UTF-8. It also explains Ruby 1.8's limited Unicode support and how Ruby 1.9 introduced multilingualization to allow setting source encoding and handling different encoded strings.
Encoding Nightmares (and how to avoid them)
This document discusses character encoding and localization nightmares. It begins with examples of encoding issues causing problems like corrupted documents and data loss. It then explains the history of character encoding as the need for encoding non-English languages grew. This led to a "Tower of Babel" effect with different encodings representing different characters. The document outlines the rise of Unicode as a unified standard and provides four rules of thumb to avoid encoding nightmares, such as limiting applications and using UTF-8 encoding when possible. It concludes with tricks and tools for checking, converting, and working with encodings.
Ascii codes
Computer programmers developed coding systems to represent letters, numbers, and symbols with numeric codes. Three popular coding systems are EBCDIC, ASCII, and Unicode. EBCDIC used 6-bit codes and could represent 64 symbols, while ASCII is now most common and uses 8-bit codes for 256 symbols. Unicode is an evolving worldwide standard that uses 16-bit codes to represent over 65,000 symbols and characters from different languages.
Ascii codes
Computer programmers developed coding systems to represent letters, numbers, and symbols with numeric codes. Three popular coding systems are EBCDIC, ASCII, and Unicode. EBCDIC used 6-bit codes and could represent 64 symbols, while ASCII is now most common and uses 8-bit codes for 256 symbols. Unicode is an developing standard that uses two bytes and 16 bits to represent each of its 65,536 symbols, allowing it to include symbols from languages around the world.
JAVA CHARACTER SETS- FUNDAMENTALS OF JAVA
Presentation of java character set .
It includes following topics-
Introduction to java fundamentals
Introduction to character set -ASCII & UNICODE
To watch full lecture kindly click on the link below.
https://www.youtube.com/watch?v=2_JkgxXzkMI
Character Sets
This document discusses character sets like ASCII and Unicode. ASCII maps English letters, numbers, and symbols to 7-bit binary codes and was the original standard, while Unicode is now more widely used as it supports over 110,000 characters from writing systems around the world, including ASCII as a subset for compatibility. An example at the end shows converting decimal values into ASCII text using an ASCII conversion table.
Adv uni
The ASCII system standardizes text files by assigning each character a unique number that can be converted to a binary pattern, ensuring compatibility across computer systems. It uses 7 bits, allowing for 128 characters including 32 control characters. Extended ASCII expands this to 8 bits for 256 characters. Unicode supersedes these systems with 16 bits supporting over 65,000 characters, including those needed for languages like Japanese. While Unicode supports many scripts, its files are larger since each character requires 2 bytes of storage.
Topic 2.3 (1)
The document discusses information coding schemes used in data processing. It explains three common coding schemes - ASCII, EBCDIC, and Unicode. ASCII uses 8 bits to represent 256 characters and is used on personal computers. EBCDIC also uses 8 bits but is used on IBM mainframes. Unicode uses 16 bits to represent over 65,000 characters and supports all global languages.
multilanguage.pdf
The document discusses character sets and encoding for multiple languages. It describes the history of character encoding standards like ASCII, EBCDIC, and codepages. It then covers early multi-language encoding schemes like IBM's codepages and Lotus' LMBCS (Lotus MultiByte Character Set). LMBCS allowed combining characters from different codepages in a string by prefixing each with a code group identifier. However, Unicode ultimately became the dominant international standard for encoding all languages and scripts.
Representation of Text
Characters are represented using character sets like ASCII and Unicode. ASCII uses 7 bits for 128 characters while Extended ASCII uses 8 bits for 256 characters. Unicode was developed to represent more languages and uses 16 bits, allowing it to store up to 65,536 characters to support international communication needs beyond what ASCII provided. The document discusses the evolution of character set standards from ASCII to Extended ASCII to Unicode.
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Character encoding standard(1)
- 1. PRESENTED BY PRAMILA. S M.L.I.S (I YEAR)
- 2. In computing, a character encoding is used to represent a repertoire of characters by some kind of an encoding system. A character encoding is used in both computation, data storage, and transmission of textual data. Terms such as character set, character map, code set or code page are sometimes used as near synonyms; however, these terms have related but distinct meanings described in the article.
- 3. ISO 646 ASCII EBCDIC CP37 CP930 CP1047 ISO 885
- 4. Windows-1251 for Cyrillic alphabets Windows-1252 forWestern languages Windows-1253 for Greek
- 5. The American Standard Code for Information Interchange is a character-encoding scheme originally based on the english alphabet that encodes 128 specified characters
- 6. Developed by x3 – American Standards Association 7 bit character encoding system It uses 7 bits for representing a character. It can express maximum of 128 characters including characters, punctuations, special characters.
- 7. Limitations of ASCII: The 8-bit ASCII notation is sufficient for many practical applications in ENGLISH language or other languages having a smaller number of alphabetic. However, there are languages which have more than 256 alphabetic, typical examples are Far Eastern languages like CHINEESE, JAPANEESE, and KOREAN.
- 8. Extended binary coded decimal interchange code. 8 bit character encoding standard. Mainly used in IBM mainframe computers.
- 9. Assign unique code for each and every character. It can be used in any platform. Contains 1,10,000 charcters covers 100 scripts Developed by joe beeker , lee collins, mark davis of xerox company. It is a 16 bit representation of a character Other versions are ▪ UTF -8 (Unicode Transformation Format) ▪ UTF-16 (Unicode Transformation Format)
- 10. It may contain 216 = 65536 patterns. That can interpret alphabetic of any language or in fact of many languages
- 11. Thank you