1、 International Telecommunication Union ITU-T T.851TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1(05/2006) SERIES T: TERMINALS FOR TELEMATIC SERVICES ITU-T T.81 (JPEG-1)-based still-image coding using an alternative arithmetic coder Corrigendum 1 ITU-T Recommendation T.851 (2005) Corri
2、gendum 1 ITU-T Rec. T.851 (2005)/Cor.1 (05/2006) i ITU-T Recommendation T.851 ITU-T T.81 (JPEG-1)-based still-image coding using an alternative arithmetic coder Corrigendum 1 Summary This corrigendum provides corrections to three errors that were discovered in ITU-T Rec. T.851: An incorrect code ass
3、ignment in Table 2, and incorrect assignment blocks in Figures 10-1 and 10-10. Source Corrigendum 1 to ITU-T Recommendation T.851 (2005) was approved on 29 May 2006 by ITU-T Study Group 16 (2005-2008) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. T.851 (2005)/Cor.1 (05/2006) FOREWORD T
4、he 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 questions and issuing Re
5、commendations 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 Recommendations on these topics. T
6、he 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, the expression “Admi
7、nistration“ 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 applicability) and com
8、pliance 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 with the Recommendation
9、 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 applicability of claimed
10、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 this Recommendation
11、. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2006 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without
12、the prior written permission of ITU. ITU-T Rec. T.851 (2005)/Cor.1 (05/2006) iii CONTENTS Page 1) Incorrect code assignment in Table 2 . 1 2) Incorrect assignment block in Figure 10-1 . 1 3) Incorrect assignment block in Figure 10-10 . 2 ITU-T Rec. T.851 (2005)/Cor.1 (05/2006) 1 ITU-T Recommendation
13、 T.851 ITU-T T.81 (JPEG-1)-based still-image coding using an alternative arithmetic coder Corrigendum 1 1) Incorrect code assignment in Table 2 In the “Reserved markers“ section of Table 2, Marker code assignments, the code assignment should be as follows: Reserved markers XFF00 through XFF8F XFF90
14、through XFFBF RES May be generated by Q15-coder Reserved 2) Incorrect assignment block in Figure 10-1 In Figure 10-1, Code_LPS(S) procedure for Q15-coder, the assignment block is incorrect. The figure should be depicted as follows: 2 ITU-T Rec. T.851 (2005)/Cor.1 (05/2006) 3) Incorrect assignment bl
15、ock in Figure 10-10 In Figure 10-10, Initialization of the decoder, the first assignment block is incorrect. The figure should be depicted as follows: T.851(05)COR.1_F10.10Initialize statistics areas BP = BPSTC = SLL B 16 DoneInitdecByte_inC = SLL C 7CT = CT 7A = X8000Printed in Switzerland Geneva,
16、2006 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff 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, dig
17、ital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services 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 pro
18、tection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission q
19、uality, telephone installations, local 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, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
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