This is a list of some binary codes that are (or have been) used to represent text as a sequence of binary digits "0" and "1". Fixed-width binary codes use a set number of bits to represent each character in the text, while in variable-width binary codes, the number of bits may vary from character to character. the binary codes are used to read the computer language.
Several different five-bit codes were used for early punched tape systems.
Five bits per character only allows for 32 different characters, so many of the five-bit codes used two sets of characters per value referred to as FIGS (figures) and LTRS (letters), and reserved two characters to switch between these sets. This effectively allowed the use of 60 characters.
Braille – Braille characters are represented using six dot positions, arranged in a rectangle. Each position may contain a raised dot or not, so Braille can be considered to be a six-bit binary code.
ASCII – The ubiquitous ASCII code was originally defined as a seven-bit character set. The ASCII article provides a detailed set of equivalent standards and variants. In addition, there are various extensions of ASCII to eight bits (see Eight-bit binary codes)
CCIR 476 – Extends ITA2 from 5 to 7 bits, using the extra 2 bits as check digits[4]
AUTOSPEC – Also known as Bauer code. AUTOSPEC repeats a five-bit character twice, but if the character has odd parity, the repetition is inverted.[4]
Decabit – A datagram of electronic pulses which are transmitted commonly through power lines. Decabit is mainly used in Germany and other European countries.
UTF-8 – Encodes characters in a way that is mostly compatible with ASCII but can also encode the full repertoire of Unicode characters with sequences of up to four 8-bit bytes.
UTF-16 – Extends UCS-2 to cover the whole of Unicode with sequences of one or two 16-bit elements
GB 18030 – A full-Unicode variable-length code designed for compatibility with older Chinese multibyte encodings
Huffman coding – A technique for expressing more common characters using shorter bit strings than are used for less common characters
Data compression systems such as Lempel–Ziv–Welch can compress arbitrary binary data. They are therefore not binary codes themselves but may be applied to binary codes to reduce storage needs
Otheredit
Morse code is a variable-length telegraphy code, which traditionally uses a series of long and short pulses to encode characters. It relies on gaps between the pulses to provide separation between letters and words, as the letter codes do not have the "prefix property". This means that Morse code is not necessarily a binary system, but in a sense may be a ternary system, with a 10 for a "dit" or a "dot", a 1110 for a dash, and a 00 for a single unit of separation. Morse code can be represented as a binary stream by allowing each bit to represent one unit of time. Thus a "dit" or "dot" is represented as a 1 bit, while a "dah" or "dash" is represented as three consecutive 1 bits. Spaces between symbols, letters, and words are represented as one, three, or seven consecutive 0 bits. For example, "NO U" in Morse code is "— .— — —. . —", which could be represented in binary as "1110100011101110111000000010101110". If, however, Morse code is represented as a ternary system, "NO U" would be represented as "1110|10|00|1110|1110|1110|00|00|00|10|10|1110".
^ abAlan G. Hobbs (1999-03-05). . NADCOMM Museum. Archived from the original on 1999-11-04.
^ abGil Smith (2001). "Teletypewriter Communication Codes" (PDF).
^. The Ferranti Orion Web Site. Archived from the original on 2011-07-21.
^ abcd"Telecipher Devices". John Savard's Home Page.
February 09, 2024
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This is a list of some binary codes that are or have been used to represent text as a sequence of binary digits 0 and 1 Fixed width binary codes use a set number of bits to represent each character in the text while in variable width binary codes the number of bits may vary from character to character the binary codes are used to read the computer language Contents 1 Five bit binary codes 2 Six bit binary codes 3 Seven bit binary codes 4 Eight bit binary codes 5 10 bit binary codes 6 16 bit binary codes 7 32 bit binary codes 8 Variable length binary codes 9 Other 10 See also 11 ReferencesFive bit binary codes editSeveral different five bit codes were used for early punched tape systems Five bits per character only allows for 32 different characters so many of the five bit codes used two sets of characters per value referred to as FIGS figures and LTRS letters and reserved two characters to switch between these sets This effectively allowed the use of 60 characters Standard five bit standard codes are International Telegraph Alphabet No 1 ITA1 Also commonly referred to as Baudot code 1 International Telegraph Alphabet No 2 ITA2 Also commonly referred to as Murray code 1 2 American Teletypewriter code USTTY A variant of ITA2 used in the USA 2 DIN 66006 Developed for the presentation of ALGOL ALCOR programs on paper tape and punch cardsThe following early computer systems each used its own five bit code J Lyons and Co LEO Lyon s Electronic Office English Electric DEUCE University of Illinois at Urbana Champaign ILLIAC ZEBRA EMI 1100 Ferranti Mercury Pegasus and Orion systems 3 The steganographic code commonly known as Bacon s cipher uses groups of 5 binary valued elements to represent letters of the alphabet Six bit binary codes editSix bits per character allows 64 distinct characters to be represented Examples of six bit binary codes are International Telegraph Alphabet No 4 ITA4 4 Six bit BCD Binary Coded Decimal used by early mainframe computers Six bit ASCII subset of the primitive seven bit ASCII Braille Braille characters are represented using six dot positions arranged in a rectangle Each position may contain a raised dot or not so Braille can be considered to be a six bit binary code See also Six bit character codesSeven bit binary codes editExamples of seven bit binary codes are International Telegraph Alphabet No 3 ITA3 derived from the Moore ARQ code and also known as the RCA ASCII The ubiquitous ASCII code was originally defined as a seven bit character set The ASCII article provides a detailed set of equivalent standards and variants In addition there are various extensions of ASCII to eight bits see Eight bit binary codes CCIR 476 Extends ITA2 from 5 to 7 bits using the extra 2 bits as check digits 4 International Telegraph Alphabet No 4 ITA4 4 Eight bit binary codes editExtended ASCII A number of standards extend ASCII to eight bits by adding a further 128 characters such as HP Roman ISO IEC 8859 Mac OS Roman Windows 1252 EBCDIC Used in early IBM computers and current IBM i and System z systems 10 bit binary codes editAUTOSPEC Also known as Bauer code AUTOSPEC repeats a five bit character twice but if the character has odd parity the repetition is inverted 4 Decabit A datagram of electronic pulses which are transmitted commonly through power lines Decabit is mainly used in Germany and other European countries 16 bit binary codes editUCS 2 An obsolete encoding capable of representing the basic multilingual plane of Unicode32 bit binary codes editUTF 32 UCS 4 A four bytes per character representation of UnicodeVariable length binary codes editUTF 8 Encodes characters in a way that is mostly compatible with ASCII but can also encode the full repertoire of Unicode characters with sequences of up to four 8 bit bytes UTF 16 Extends UCS 2 to cover the whole of Unicode with sequences of one or two 16 bit elements GB 18030 A full Unicode variable length code designed for compatibility with older Chinese multibyte encodings Huffman coding A technique for expressing more common characters using shorter bit strings than are used for less common charactersData compression systems such as Lempel Ziv Welch can compress arbitrary binary data They are therefore not binary codes themselves but may be applied to binary codes to reduce storage needsOther editMorse code is a variable length telegraphy code which traditionally uses a series of long and short pulses to encode characters It relies on gaps between the pulses to provide separation between letters and words as the letter codes do not have the prefix property This means that Morse code is not necessarily a binary system but in a sense may be a ternary system with a 10 for a dit or a dot a 1110 for a dash and a 00 for a single unit of separation Morse code can be represented as a binary stream by allowing each bit to represent one unit of time Thus a dit or dot is represented as a 1 bit while a dah or dash is represented as three consecutive 1 bits Spaces between symbols letters and words are represented as one three or seven consecutive 0 bits For example NO U in Morse code is wbr wbr which could be represented in binary as 1110100011101110111000000010101110 If however Morse code is represented as a ternary system NO U would be represented as 1110 10 00 1110 1110 1110 00 00 00 10 10 1110 See also editList of computer character setsReferences edit a b Alan G Hobbs 1999 03 05 Five unit codes NADCOMM Museum Archived from the original on 1999 11 04 a b Gil Smith 2001 Teletypewriter Communication Codes PDF Paper Tape Readers amp Punches The Ferranti Orion Web Site Archived from the original on 2011 07 21 a b c d Telecipher Devices John Savard s Home Page Retrieved from https en wikipedia org w index php title List of binary codes amp oldid 1190667532 Five bit binary codes, wikipedia, wiki, book, books, library,
