ISO-23002-1-2006.pdf
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1、 Reference number ISO/IEC 23002-1:2006(E) ISO/IEC 2006 INTERNATIONAL STANDARD ISO/IEC 23002-1 First edition 2006-12-01 Information technology MPEG video technologies Part 1: Accuracy requirements for implementation of integer-output 8 8 inverse discrete cosine transform Technologies de linformation
2、Technologies vido MPEG Partie 1: Exigences dexactitude pour limplmentation de la transformation cosinus inverse discrte de sortie du nombre entier 88 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for
3、 Resale, 04/20/2007 07:46:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 23002-1:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless th
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6、unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, incl
7、uding photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Publis
8、hed in Switzerland ii ISO/IEC 2006 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:46:43 MDTNo reproduction or networking permitted without license from IH
9、S -,-,- ISO/IEC 23002-1:2006(E) ISO/IEC 2006 All rights reserved iii Contents Page Foreword.iv 1 Scope 1 2 Terms and definitions .1 3 Abbreviations and symbols2 3.1 Abbreviations.2 3.2 Symbols3 4 Conventions.3 4.1 Arithmetic operators .3 4.2 Logical operators.3 4.3 Relational operators3 4.4 Bit-wise
10、 operators4 4.5 Assignment operators.4 4.6 Mathematical functions.4 4.7 Range notation.5 4.8 Hexadecimal notation5 5 IDCT accuracy specification.5 5.1 Ideal real-valued 8x8 forward DCT.5 5.2 Ideal integer-valued 8x8 forward DCT .5 5.3 Ideal real-valued 8x8 inverse DCT5 5.4 Ideal integer-valued 8x8 i
11、nverse DCT5 5.5 Integer-output IDCT accuracy testing procedure and requirements .6 Annex A (normative) Additional test of near-DC inversion behaviour9 Annex B (normative) Additional pseudo-random input data tests 10 Bibliography11 Copyright International Organization for Standardization Provided by
12、IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:46:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 23002-1:2006(E) iv ISO/IEC 2006 All rights reserved Foreword ISO (the International Organization for Standar
13、dization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organizatio
14、n to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, IS
15、O and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted
16、 by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of pa
17、tent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 23002-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information Technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. ISO/IEC 23002 co
18、nsists of the following parts, under the general title Information technology MPEG video technologies: Part 1: Accuracy requirements for implementation of integer-output 8x8 inverse discrete cosine transform The following part is under preparation: Part 3: Auxiliary video data representation Copyrig
19、ht International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:46:43 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 23002-1:2006(E) ISO/IEC
20、 2006 All rights reserved 1 Information technology MPEG video technologies Part 1: Accuracy requirements for implementation of integer-output 8x8 inverse discrete cosine transform 1 Scope A number of image and video coding related standards (see Bibliography) include a requirement for decoders to im
21、plement an integer-output 8x8 inverse discrete cosine transform (IDCT) for the generation of inverse- transformed sample differences with a nominal range from 2B to (2B)1 for some integer number of bits B, where B is greater than or equal to 8. This part of ISO/IEC 23002 specifies conformance requir
22、ements for establishing sufficient accuracy in such an integer-output IDCT implementation. It is intended to be suitable for reference to establish partial or complete requirements for IDCT accuracy for conformance to other standards that require IDCT use. The accuracy requirements specified in the
23、main body of this part of ISO/IEC 23002 are essentially the same as those previously specified in 7, in Annex A of 1, and in Annex A of 5. These requirements have been specified herein to resolve normative references to 7 in MPEG standards after its withdrawal and to provide improved clarity for the
24、 specification of IDCT accuracy requirements. An additional requirement on encoded-bitstream intra refresh frequency was also previously specified in 7, establishing a requirement of bitstream conformance that each macroblock be intra-coded at least once within each series of 132 times that it is co
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