Computer Braille Code: Difference between revisions

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'''Computer Braille''' is an adaptation of [[braille]] to represent the computer code. Unlike standard 6-dot braille scripts, but like [[Gardner–Salinas braille codes]], this may employ the extended 8-dot braille patterns. The resulting 256 braille characters are assigned to the 256 characters of 8-bit computer encodings.

{{unreferenced|date=August 2012}}

'''Computer Braille''' is an adaptation of [[braille]] to an eight-dot cell; the resulting 256 characters are assigned to the 256 characters of [[ASCII]] computer coding. Unfortunately, an eight-dot cell is too large to be read easily, negating one of the principal advantages of braille, and it was abandoned in [[Unified English Braille]], which has been adopted in most English-speaking countries apart from the United States.

There are two standards of representation of computer code with braille:

One quarter of Computer Braille characters are the 64 of standard braille. Capital letters are derived by adding dot 7:

1) The '''Computer Braille Code''' as defined by the [[Braille Authority of North America]].<ref>{{cite book|title=Computer Braille Code: 2000 Revision|date=2000|publisher=Braille Authority of North America|url=http://www.brailleauthority.org/cbc/cbc.html}}</ref> It employs only the 6-dot braille patterns to represent all code points of [[ASCII]] as well as many technical characters and commands. It is virtually identical to the [[Braille ASCII]], a system of representation of braille with ASCII characters, which goal is mirrored to the Computer Braille Code. To represent ASCII code points 0x60, 0x7B, 0x7C, 0x7D, 0x7E as well as capital letters the 4-5-6 character is used as the shift indicator or modificator. Thus, {{code|`}} (grave accent, 0x60) is represented by {{braille cell|456}}{{braille cell|4}}, where {{braille cell|4}} is assigned to {{code|@}} (at sign, 0x40). In other words, {{braille cell|456}} either adds or substracts 32 to or from the ASCII value of the following character. Unlike Braille ASCII {{code|_}} (underscore, 0x40) is represented by {{braille cell|456}}{{braille cell|456}}.

{| class="wikitable" style="line-height: 1.2"

|-

!Lower case:

|{{bc|1|type=8dot}} a

|{{bc|⠃|type=8dot}} b

|{{bc|⠙|type=8dot}} d

|{{bc|⠅|type=8dot}} k

|{{bc|123|type=8dot}} l

|{{bc|⠽|type=8dot}} y

|-

!Upper case:

|{{bc|17|type=8dot}} A

|{{bc|127|type=8dot}} B

|{{bc|1457|type=8dot}} D

|{{bc|137|type=8dot}} K

|{{bc|1237|type=8dot}} L

|{{bc|134567|type=8dot}} Y

|}

2) The '''Braille Computer Notation''' as defined by the [[Braille Authority of the United Kingdom]].<ref>{{cite book|title=Braille Computer Notation|date=2006|publisher=Braille Authority of the United Kingdom (Computer Committee)|url=http://www.ukaaf.org/wp-content/uploads/2015/05/Braille-Computer-Notation-PDF.pdf}}</ref> In this notation both 6- and 8-dot patterns may be used. With the 6-dot code various combinations of braille characters can represent many technical, mathematical and logical symbols. The {{braille cell|5}} character is used as a universal modificator. The 8-dot code is designed that its 6-dot subset is identical to the 6-dot code. The remainder are assigned by the following rules:

[[Category:Braille]]

:* adding dot 7 subtracts 32 from the ASCII value;

{{writingsystem-stub}}

:* adding dot 8 adds 128 to the ASCII value;

:* adding dots 7 and 8 adds 96 to the ASCII value.

== References ==

<references />

{{Braille}}

[[Category:Braille]]