ANSI-INCITS-225-1992-R1999.pdf
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1、ANSI INCITS 225-1992 (R1999) (formerly ANSI X3.1992 (R1999) for Information Systems Compaction Algorithm Binary Arithmetic Coding Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 0
2、0:05:58 MDTNo reproduction or networking permitted without license from IHS -,-,- American National Standard Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. C
3、onsensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views an
4、d objections be considered, and that a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, o
5、r using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an in
6、terpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised
7、 or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the Americ
8、an National Standards Institute. Published by American National Standards Institute 11 West 42nd Street, New York, New York 10036 Copyright 1992 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval
9、 system or otherwise, without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resal
10、e, 05/09/2007 00:05:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI X3.225-1992 American National Standard for Information Systems Compact Algorithm Binary Arithmetic Coding Secretariat Computer and Business Equipment Manufacturers Association Approved American Nati
11、onal Standards Institute, Inc. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 00:05:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Contents Page
12、Foreword .iii 1Scope and purpose 1 2Normative references.1 3Definitions .1 4Environment and safety2 5Algorithm identifier.2 6Compaction algorithm 2 Figure 1Code block.3 Annexes APseudo code description of algorithm6 BBibliography.12 Copyright American National Standards Institute Provided by IHS und
13、er license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 00:05:58 MDTNo reproduction or networking permitted without license from IHS -,-,- iii Foreword(This foreword is not part of American National Standard X3.225-1992.) This standard presents requireme
14、nts for compacting data to be used for information interchange among processing systems, communication sys- tems, and associated equipment. This standard deals solely with compact- ing data. The X3B5 Subcommittee on Magnetic Tape, which developed this standard, consists of experienced and qualified
15、specialists on manufactur- ing magnetic tape, on recording digital information on magnetic tape, and on the compaction algorithms used to process the digital information. This algorithm represents a significant advancement in the way data is recorded on magnetic media, providing higher data rates an
16、d greater volumetric effi- ciency. In the development of this standard careful consideration was given to current practices, existing equipment and supplies, and the broadest possible acceptance, and to providing a basis for future improvements in the use of the algorithm. The standard contains spec
17、ifications for a compaction algorithm. The text of this standard differs from the corresponding ISO and ECMA standards, International Standard for Information technology Data compression for information interchange Binary arithmetic coding algorithm, ISO 12042, and Data compression for information i
18、nterchange Binary arithmetic algo- rithm, ECMA 159. However, it is the intent of this standard to be technical- ly the same. There are two annexes in this standard. Both annex A and B are informa- tive and are not considered part of this standard. Requests for interpretation, suggestions for improve
19、ment or addenda, or defect reports are welcome. They should be sent to the X3 Secretariat, Computer and Business Equipment Manufacturers Association, 1250 Eye Street, NW, Suite 200, Washington, DC 20005. This standard was processed and approved for submittal to ANSI by Accredited Standards Committee
20、 on Information Processing Systems, X3. Committee approval of the standard does not necessarily imply that all members voted for its approval. At the time it approved this standard, the X3 Committee had the following members: Copyright American National Standards Institute Provided by IHS under lice
21、nse with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 00:05:58 MDTNo reproduction or networking permitted without license from IHS -,-,- iv Harold L. Book Peter Bramhall James T. Craze Mike Deese Robert F. Driscal Gary R. Early James A. Eggebeen Arthur Freema
22、n Michael Galata Dana S. Grubb Kirk Handley Michael L. Helsel Hakan Hemdal Harry C. Hinz, Jr. David M. Hudson Kyriacos Joannou Randy Kerns Bill King Richard Lee Jack Marion Kazuyuki Masukane William Mealey Bill Medlinski T. Mitsutomi Gary D. Moeller Tom Molstad Gerrit Nijssen Pete Passaretti Keith P
23、ollock Ed Rhodes Maritza Robbennolt Howard Robinson Arnold J. Roccati Joe Shimizu Herman Strass James V. Tierney, III Henry G. Tobin Charles Wellington Douglas Whiting David M. Wilson Kirk D. Wilson James W. Wolf Kei Yamashita Joseph S. Zajaczkowski Bob Abe (Alt.) Robert B. Anthony (Alt.) Leonard Ba
24、dour (Alt.) Tom Behrens (Alt.) David Berry (Alt.) Michael L. Bolt (Alt.) Anthony B. Bova (Alt.) James U. Chesnutt (Alt.) James Chu (Alt.) Louis C. Domshy (Alt.) David J. Donald (Alt.) Chuck Fannin (Alt.) Howard Flagg (Alt.) John Fleming (Alt.) Lonnie Ford (Alt.) Shoji Fujiwara (Alt.) Jerry Ganske (A
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