1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T T.81TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1(01/2004) SERIES T: TERMINALS FOR TELEMATIC SERVICES Information technology Digital compression and coding of continuous-tone still images Requirements and guidelines Technical Corrigendum 1
2、: Patent information update ITU-T Recommendation T.81 (1992) Corrigendum 1 ITU-T Rec. T.81 (1992)/Cor.1 (01/2004) i INTERNATIONAL STANDARD ISO/IEC 10918-1 ITU-T RECOMMENDATION T.81 Information technology Digital compression and coding of continuous-tone still images Requirements and guidelines Techn
3、ical Corrigendum 1 Patent information update Source The non-normative Technical Corrigendum 1 to ITU-T Recommendation T.81 (1992) was agreed on 30 January 2004 by ITU-T Study Group 16 (2001-2004). An identical text is also published as ISO/IEC 10918-1, Corrigendum 1. ii ITU-T Rec. T.81 (1992)/Cor.1
4、(01/2004) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff ques
5、tions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendation
6、s on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation,
7、the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or ap
8、plicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance wit
9、h the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or appli
10、cability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement
11、 this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2004 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior wr
12、itten permission of ITU. ITU-T Rec. T.81 (1992)/Cor.1 (01/2004) iii CONTENTS Page L.1 Introductory remarks. 1 L.2 List of patents 1 L.3 Contact addresses for patent information 2 ISO/IEC 10918-1:1994/Cor.1:2004 (E) ITU-T Rec. T.81 (1992)/Cor.1 (01/2004) 1 INTERNATIONAL STANDARD ITU-T RECOMMENDATION
13、Information technology Digital compression and coding of continuous-tone still images Requirements and guidelines Technical Corrigendum 1 Patent information update Replace Annex L (1992) text by the following: Annex L Patents (This annex does not form an integral part of this Recommendation | Intern
14、ational Standard) L.1 Introductory remarks The users attention is called to the possibility that for some of the coding processes specified in Annexes F, G, H, and J compliance with this Specification may require use of an invention covered by patent rights. By publication of this Specification, no
15、position is taken with respect to the validity of this claim or of any other claimed patent rights in connection therewith. However, for each patent listed in this annex, the patent holder has filed with the Information Technology Task Force (ITTF) of ISO/IEC and the Telecommunication Standardizatio
16、n Bureau (TSB) of the ITU a statement of willingness to grant a licence under these rights on reasonable and non-discriminatory terms and conditions to applicants desiring to obtain such a licence (see the respective ITU-T and ISO IPR policies for details). In accordance with the IPR policies of ISO
17、/IEC and ITU-T, the criteria for including patents in this annex are: a) the patent has been identified by someone who is familiar with the technical fields relevant to this Specification, and who believes use of the invention covered by the patent is required for implementation of one or more of th
18、e coding processes specified in Annexes F, G, H, or J; b) and the patent-holder has written a letter to the ITTF and TSB, stating willingness to grant a licence to an unlimited number of applicants throughout the world under reasonable terms and conditions that are demonstrably free of any unfair di
19、scrimination. This list of patents shall be updated, if necessary, upon publication of any revisions to this Recommendation | International Standard. For the latest list of the patent statements received by the ITU, please consult http:/www.itu.int/, ITU-T databases. L.2 List of patents According to
20、 L.1, the following patents may be required for implementation of any one of the processes specified in Annexes F, G, H, and J which uses arithmetic coding: US 4,633,490, December 30, 1986, IBM, MITCHELL (J.L.) and GOERTZEL (G.): Symmetrical Adaptive Data Compression/Decompression System. US 4,652,8
21、56, February 4, 1986, IBM, MOHIUDDIN (K.M.) and RISSANEN (J.J.): A Multiplication-free Multi-Alphabet Arithmetic Code. US 4,369,463, January 18, 1983, IBM, ANASTASSIOU (D.) and MITCHELL (J.L.): Grey Scale Image Compression with Code Words a Function of Image History. US 4,749,983, June 7, 1988, IBM,
22、 LANGDON (G.): Compression of Multilevel Signals. ISO/IEC 10918-1:1994/Cor.1:2004 (E) 2 ITU-T Rec. T.81 (1992)/Cor.1 (01/2004) US 4,935,882, June 19, 1990, IBM, PENNEBAKER (W.B.) and MITCHELL (J.L.): Probability Adaptation for Arithmetic Coders. US 4,905,297, February 27, 1990, IBM, LANGDON (G.G.),
23、Jr., MITCHELL (J.L.), PENNEBAKER (W.B.), and RISSANEN (J.J.): Arithmetic Coding Encoder and Decoder System. US 4,973,961, November 27, 1990, AT&T, CHAMZAS (C.), DUTTWEILER (D.L.): Method and Apparatus for Carry-over Control in Arithmetic Entropy Coding. US 5,025,258, June 18, 1991, AT&T, DUTTWEILER
24、(D.L): Adaptive Probability Estimator for Entropy Encoding/Decoding. US 5,099,440, March 24, 1992, IBM, PENNEBAKER (W.B.) and MITCHELL (J.L.): Probability Adaptation for Arithmetic Coders. Japanese Patent 2128115, February 26, 1990, MEL ONO (F.), KIMURA (T.), YOSHIDA (M.), and KINO (S.): Coding Syst
25、em. The following patent may be required for implementation of any one of the hierarchical processes specified in Annex H when used with a lossless final frame: US 4,665,436, May 12, 1987, EI OSBORNE (J.A.) and SEIFFERT (C.): Narrow Bandwidth Signal Transmission. No other patents required for implem
26、entation of any of the other processes specified in Annexes F, G, H, or J had been identified in the ITU-T IPR database at the time of publication of this Specification. L.3 Contact addresses for patent information Director, Telecommunication Standardization Bureau (formerly CCITT) International Tel
27、ecommunication Union Place des Nations CH-1211 Genve 20, Switzerland Tel. +41 (22) 730 5111 Fax: +41 (22) 730 5853 Information Technology Task Force International Organization for Standardization 1, rue de Varemb CH-1211 Genve 20, Switzerland Tel: +41 (22) 734 0150 Fax: +41 (22) 733 3843 Program Man
28、ager, Licensing Intellectual Property and Licensing Services IBM Corporation 208 Harbor Drive P.O. Box 10501 Stamford, Connecticut 08904-2501, USA Tel: +1 (203) 973 7935 Fax: +1 (203) 973 7981 or +1 (203) 973 7982 Mitsubishi Electric Corp. Corporate Licensing Department 1-2-3 Marunouchi, Chiyoda-ku
29、Tokyo 100, Japan Tel: +81 (3) 3218 3465 Fax: +81 (3) 3218 2474 ISO/IEC 10918-1:1994/Cor.1:2004 (E) ITU-T Rec. T.81 (1992)/Cor.1 (01/2004) 3 Lucent Technologies, Senior Manager Intellectual Property Business 101 Crawfords Corner Road Holmdel, NJ 07733-3030, USA Tel: +1(732) 949 8662 Fax: +1(732) 949
30、4729 Senior General Manager Corporate Intellectual Property and Legal Headquarters Canon Inc. 30-2 Shimomaruko 3-chome Ohta-ku Tokyo 146 Japan Tel: +81 (3) 3758 2111 Fax: +81 (3) 3756 0947 Chief Executive Officer Electronic Imagery, Inc. 1100 Park Central Boulevard South Suite 3400 Pompano Beach, FL
31、 33064, USA Tel: +1 (305) 968 7100 Fax: +1 (305) 968 7319 Printed in Switzerland Geneva, 2004 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols, classification Series C General telecommunication statistics Series D General t
32、ariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services
33、 digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M TMN and network maintenance: intern
34、ational transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local
35、line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure, Internet protocol aspects and Next Generation Networks Series Z Languages and general software aspects for telecommunication systems
