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Topic: Standard Compression Scheme for Unicode


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In the News (Fri 17 Feb 12)

  
 RFC 3536 (rfc3536) - Terminology Used in Internationalization in the IETF
Standards Bodies and Standards This section describes some of the standards bodies and standards that appear in discussions of internationalization in the IETF.
The Unicode Standard is a CCS whose repertoire and code points are identical to ISO/IEC 10646.
This refers to code points of the standard whose interpretation is not specified by the standard and whose use may be determined by private agreement among cooperating users.
www.faqs.org /rfcs/rfc3536.html   (7462 words)

  
 Encyclopedia: Standard Compression Scheme for Unicode
UTF-7 (7-bit Unicode Transformation Format) is a variable-length character encoding that was proposed for representing Unicode-encoded text using a stream of ASCII characters, for example for use in MIME messages.
Han unification is the process used by the authors of Unicode and the Universal Character Set to map multiple character sets of the CJK languages into a single set of unified characters.
In computing, UTF-16 is a 16-bit Unicode Transformation Format, a character encoding form that provides a way to represent a series of abstract characters from Unicode and ISO/IEC 10646 as a series of 16-bit words suitable for storage or transmission via data networks.
www.nationmaster.com /encyclopedia/Standard-Compression-Scheme-for-Unicode   (816 words)

  
 UTS #6: Compression Scheme for Unicode
SCSU also does not attempt to preserve the binary ordering of strings, and is not MIME compatible, which limits its attractiveness as a processing format, particularly in databases, or as general purpose interchange format.
The Unicode Compression Scheme compresses text by defining a set of windows into the [Unicode] codespace and interpreting byte values relative to the position of the window currently in force.
The original concept of a standard compression scheme for Unicode was implemented at Reuters and proposed by Misha Wolf and Charles Wicksteed.
www.unicode.org /reports/tr6   (6152 words)

  
 UnicodeCompressor (icu4j)
During compression, characters within a window are encoded in the compressed stream as the bytes
The SCSU approximates the storage size of traditional character sets, for example 1 byte per character for ASCII or Latin-1 text, and 2 bytes per character for CJK ideographs.
Compress a Unicode character array into a byte array.
icu.sourceforge.net /apiref/icu4j/com/ibm/icu/text/UnicodeCompressor.html   (294 words)

  
 Unicode Demystified: A Practical Guide to the Encoding Standard   (Site not responding. Last check: 2007-10-08)
As the software marketplace becomes more global in scope, programmers are recognizing the importance of the Unicode standard for engineering robust software that works across multiple regions, countries, languages, alphabets, and scripts.
Beginning with a structural overview of the standard and a discussion of its heritage and motivations, the book then shifts focus to the various writing systems represented by Unicode--along with the challenges associated with each.
The book begins with a structural overview of the standard and a discussion of its history, then looks at the various writing systems represented by Unicode and the challenges associated with each, and presents strategies for implementing various aspects of the standard.
www.booksmatter.com /b0201700522.htm   (444 words)

  
 DTV Guide PSIP   (Site not responding. Last check: 2007-10-08)
The document defines the standard protocol for transmission of the relevant data tables contained within packets carried in the transport stream multiplex.
Unicode Technical Report #6, A Standard Compression Scheme for Unicode, Revision 3.0, 1999-11-12, The Unicode Consortium.
This standard defines a method for communicating metadata related to PSIP (Program and System Information Protocol), including duplicate data that needs to be entered in other locations in the transport stream.
www.atsc.org /document_map/psip.htm   (1095 words)

  
 DataCompression.info - Lossless Compression   (Site not responding. Last check: 2007-10-08)
Unlike "lossy" compression schemes (like MP3) that discard information, WavPack converts the audio data into a more compact form so that the restored files are digitally identical to the original source.
Like other lossless compression schemes the data reduction varies with the source, but it is generally between 25% and 50% for typical popular music and somewhat better than that for classical music and other sources with greater dynamic range.
This is a bi-level image compression scheme designed to be used for scanned images of books, faxes, etc. It is a non-degrading scheme, but not lossless.
datacompression.info /Lossless.shtml   (7119 words)

  
 ZIP2 File Structure - COMP Chunk
This is a Compression Algorithm specification, used to configure parameters for a compression algorithm.
Generally, compressing this chunk is pointless, so any use of the y flag will probably be for other unrelated purposes, such as data-integrety of this critical information.
This decision adds one byte to the total size of a chunk that defines a compression method, but this is considered insignificant to the overall archive.
www.dlugosz.com /ZIP2/COMP.html   (1658 words)

  
 RFC 3536
The International Organization for Standardization has been involved with standards for characters since before the IETF was started.
Although the IETF does not standardize user interfaces, many protocols make assumptions about how a user will enter or see text that is used in the protocol.
A transfer encoding syntax (TES) (sometimes called a transfer encoding scheme) is a reversible transform of already-encoded data that is represented in one or more character encoding schemes.
www.apps.ietf.org /rfc/rfc3536.html   (7044 words)

  
 [No title]
ISO has many diverse standards in the international characters area; the one that is most used in the IETF is commonly referred to as "ISO/IEC 10646", although its official name has Hoffman Informational [Page 8] RFC 3536 Terminology Used in Internationalization in the IETF May 2003 more qualifications.
Unicode Consortium The second important group for international character standards is the Unicode Consortium.
Hoffman Informational [Page 18] RFC 3536 Terminology Used in Internationalization in the IETF May 2003 It is common to see strings with text in both directions, such as strings that include both text and numbers, or strings that contain a mixture of scripts.
www.ietf.org /rfc/rfc3536.txt   (7547 words)

  
 RFC 3536 - Terminology Used in Internationalization in the IETF. P. Hoffman.
RFC 3536 Terminology Used in Internationalization in the IETF May 2003 nonspacing character A combining character whose positioning in presentation is dependent on its base character.
RFC 3536 Terminology Used in Internationalization in the IETF May 2003 It is common to see strings with text in both directions, such as strings that include both text and numbers, or strings that contain a mixture of scripts.
RFC 3536 Terminology Used in Internationalization in the IETF May 2003 The Unicode Consortium has a good discussion about how to adapt regular expression engines to use Unicode.
rfc.sunsite.dk /rfc/rfc3536.html   (7684 words)

  
 DataCompression.info - Non-Commercial Libraries   (Site not responding. Last check: 2007-10-08)
Michael Dipperstein has written a few compression programs, which naturally requires that you be able to read and write bits one at a time, and possibly in chunks of other sizes.
The Open Compression Toolkit is a set of modular C++ classes and utilities for implementing and testing compression algorithms.
This unit implements a component which allows the user to compress data using a combination of LZSS compression and adaptive Huffman coding (Similar to that use by LHARC 1.x), or conversely to decompress data that was previously compressed by this unit.
datacompression.info /NonCommercialLibs.shtml   (10080 words)

  
 Symbian: Technology: Symbian OS v6.x Functional Description   (Site not responding. Last check: 2007-10-08)
The Standard Compression Scheme for Unicode is used by default to store text in files.
The Unicode collation algorithm is used for collated string comparison.
The standard GDB command-line interface is extended to support Symbian OS-specific features: downloading files from the host to the target, selecting the program to debug and setting its command-line, connecting to the target, limited facilities to help debugging Unicode programs and loading dll debugging information.
www.symbian.com /technology/symbos-v6x-det.html   (7507 words)

  
 SBF Glossary: Sc to SCYC
The dominant use doesn't seem to color the sense of ``color scheme,'' suggesting that scheme is kind of lexical mordant.
A closely related sense of scheme occurs in the phrase ``pension scheme.'' That term is used widely in the UK and rarely in the US (the US term is ``pension plan,'' much less common in the UK).
Another example of this new collocation pattern, or perhaps revived older sense, is in the phrase ``housing scheme.'' The new OED edition offers an additional sense of scheme as short for this phrase in Scottish colloquial usage, but that is not enough.
www.plexoft.com /SBF/S02.html   (6461 words)

  
 The Cyrillic Charset Soup
Even though ISO 8859 contains a standard Cyrillic charset, there is a whole bunch of other Cyrillic encodings being used on computers worldwide.
Their draft got published as 1st edition standard ECMA-113 in 1986 and draft international standard DIS-8859-5 in 1987 and was registered with the number 111 in ISO's
SCSU) allows to reduce this to the traditional one byte per letter.
czyborra.com /charsets/cyrillic.html   (1620 words)

  
 Sharmahd Computing UniPad - Version History
Conversion of \u sequences: a \u sequence was not converted to a Unicode character when a single backslash occured somewhere before this sequence.
UniPad now supports the character planes 1 to 17 of the Unicode Standard and ISO-10646 (plane 0 is the Basic Multilingual Plane).
On Windows 95/98 Unicode text in the clipboard was not automatically converted into the local codepage.
www.unipad.org /history   (3337 words)

  
 ietf-charsets@iana.org from July to September 1998: Re: TR6 charset   (Site not responding. Last check: 2007-10-08)
Next message: Misha Wolf: "13th Int'l Unicode Conference, Sep 1998, San Jose -- 2nd reminder"
Personally, I think registering this charset will be counter-productive to the acceptance of Unicode and is a bad idea.
This encoding scheme is particularly bad because it can't be used in a MIME text/* media type and it permits NUL octets, so it will have to be encoded in most transport environments.
lists.w3.org /Archives/Public/ietf-charsets/1998JulSep/0028.html   (141 words)

  
 Sharmahd Computing UniPad - News Archive
The file I/O routines have been changed because of a potential problem.
New font engine (no up.fon anymore), support for Unicode planes 1 to 17, Hiragana and Katakana, several bug fixes and minor improvements.
Customizable keyboard layouts, tabulator support, improved command line support, Standard Compression Scheme for Unicode, updated to Unicode 3.0.
www.unipad.org /news/archiv.html   (137 words)

  
 V.E.R.A. -- Virtual Entity of Relevant Acronyms   (Site not responding. Last check: 2007-10-08)
Suomen Standardisoimisliitto [Standards Association of Finland] (org., Finland)
Standard Generalized Markup Language (ISO 8879, JTC1, RFC 1874, SGML)
STandard for the External representation / Exchange of Product data definition (ISO, DP 10303, CAD)
www.delorie.com /gnu/docs/vera/vera_20.html   (877 words)

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