1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU H.262 Corrigendum 1 (1 1 /2000) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services - Coding of moving video Information technology - Generic coding of moving pictures and asso
2、ciated audio information: Video Technical Corrigendum 1 ITU-T Recommendation H.262 - Corrigendum 1 (Formerly CCIlT Recommendation) INTERNATIONAL TELECOMMUN CATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU H.262 Corrigendum 1 (1 1 /2000) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS
3、Infrastructure of audiovisual services - Coding of moving video Information technology - Generic coding of moving pictures and associated audio information: Video Technical Corrigendum 1 ITU-T Recommendation H.262 - Corrigendum 1 (Formerly CCIlT Recommendation) ITU-T H-SERIES RECOMMENDATIONS AUDIOVI
4、SUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS INFRASTRUCTURE OF AUDIOVISUAL SERVICES General Transmission multiplexing and synchronization Systems aspects Communication procedures Coding of moving video Related systems aspects SYSTEMS AND TERMINAL EQUIPMENT FOR AUDIOVISUAL
5、SERVICES SUPPLEMENTARY SERVICES FOR MULTIMEDIA H.100-H.199 H.200-H.2 19 H.220-H.229 H.230-H.239 H.240-H.259 H.260-H.279 H.280-H.299 H.300-H.399 H.450-H.499 _ For further details, please refer to the list of ITU-T Recommendations. INTERNATIONAL STANDARD 13818-2 ITU-T RECOMMENDATION H.262 INFORMATION
6、TECHNOLOGY - GENERIC CODING OF MOVING PICTURES AND ASSOCIATED AUDIO INFORMATION: VIDEO TECHNICAL CORRIGENDUM 1 Summary This technical corrigendum corrects the description of the handling of reserved extension data within an H.262 elementary video bitstream. In order to enable the future adoption of
7、backward-compatible extensions to the H.262 syntax, the proper decoder response to the presence of reserved extension data must be clearly specified. This technical corrigendum corrects an oversight in the description of the decoder response to such data. Source Corrigendum 1 to ITU-T Recommendation
8、 H.262 was prepared by ITU-T Study Group 16 (2001-2004) and approved on 17 November 2000. An identical text is also published as Technical Corrigendum 1 to ISO/EC 13818-2. ITU-T H.262 (2000)/Cor.l(11/2000 E) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized
9、 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 Recommendations on them with a view to standardizing telecommunications on a world
10、wide 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. The approval of ITU-T Recommendations is covered by the procedure laid down in WT
11、SA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication adminis
12、tration and a recognized operating agency. 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 applicabi
13、lity 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 thi
14、s Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electro
15、nic or mechanical, including photocopying and microfilm, without permission in writing from ITU. 11 ITU-T H.262 (2000)/Cor.l (11/2000 E) CONTENTS Page 1) Subclause 6.2.2.2.1 . 1 2) New subclause 6.3.4.2 2 ITU-T H.262 (2000)/Cor.l(11/2000 E) . 111 ISO1IEC 13818-2 : 20001Cor.l: 2001 (E) extension-data
16、 i ) INTERNATIONAL STANDARD ITU-T RECOMMENDATION No. of bits Mnemonic INFORMATION TECHNOLOGY - GENERIC CODING OF MOVING PICTURES AND ASSOCIATED AUDIO INFORMATION: VIDEO while ( nextbits()= extension-start-code ) extension-start-code TECHNICAL CORRIGENDUM 1 32 bslbf 1) Subclause 6.2.2.2.1 Replace th
17、e syntax table with the following: else if ( nextbits() = “Sequence Scalable Extension ID“ ) sequence-scaiableextension() else if (i = O) /* follows sequenceextension() */ if ( nextbits()= “Sequence Display Extension 1D“ ) while ( nextbitso != l ) reservedextension-databyte I sequence-display-extens
18、ion() I I I uimsbf 8 = “Picture Temporal Scalable Extension ID“ ) pictwetemporaiscalable-extension() I /* NOTE - i never takes the value 1 because extenzn-datao I never follows a groupof-pictures-header() */ I I I if (i = 2) /* follows picture-codingextension() */ if ( nextbits() = “Quant Matrix Ext
19、ension ID“ ) quant-matrixextension() else if ( nextbitso = “Copyright Extension ID“ ) cop yright-extension() else if ( nextbits() = “Picture Display Extension ID“ ) pictur e-display-extension() else if ( nextbits() = “Picture Spatial Scalable Extension ID“ ) picture-spatial-scalable-ex tension() els
20、e if ( nextbitso ITU-T H.262 (2000)/Cor.l(11/2000 E) 1 ISO/IEC 13818-2 : 2000/Cor.l: 2001 (E) else if ( nextbitso = “Camera Parameters Extension ID“ ) camera-parametersextension() I I I else if ( nextbitso I I I = “KU-T Extension ID“ ) lTU-T-extensionO else while ( nextbitso != oo00 oo00 oo00 oo00 O
21、ool ) I 8 I uimsbf I reserved-extension-data-byte I 2) New subclause 6.3.4.2 Add the following after subclause 6.3.4.1: 6.3.4.2 Extension data reserved-extension-data-byte - Reserved for possible future backward-compatible extensions to be specified by ITU-T I ISODEC. A decoder conforming to this Sp
22、ecification that encounters reserved-extension-data-byte in a bitstream shall ignore it e. remove fkom the bitstream and discard). A bitstream conforming to this Specification shall not contain this syntax element. 2 ITU-T H.262 (2000)/Cor.l(11/2000 E) Series A Series B Series C Series D Series E Se
23、ries F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z SERIES OF ITU-T RECOMMENDATIONS Organization of the work of ITU-T Means of expression: definitions, symbols, classificatio
24、n General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated servi
25、ces digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, te
26、legraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph service
27、s terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 2001
