1、STD-ITU-T RECMN T.172-ENGL 1778 m 4862573 0649011 T40 m INTERNATIONAL TELECOMMUNICATION UNION ITU-T TE LEC0 MM UN I CATI ON STANDARDIZATION SECTOR OF ITU T.172 (02/98) SERIES T: TERMINALS FOR TELEMATIC SERVICES MHEG-5 - Support for base-level interactive applications ITU-T Recommendation T. 172 (Pre
2、viously CCITT Recommendation) ITU-T T-SERIES RECOMMENDATIONS TERMINALS FOR TELEMATIC SERVICES For further details, please refer to ITU-T List of Recommendations. STD-ITU-T RECMN T-172-ENGL 1998 = 4Bb2591 Ob49013 813 = ITU-T RECOMMENDATION T.172 MHEG-5 - SUPPORT FOR BASE-LEVEL INTERACTIVE APPLICATION
3、S Summary This Recommendation specifies semantics and final-form interchange syntax for MHEG-5 objects, based on concepts defined in Recommendation T.171. These objects are intended for use in the domain of simple clienthewer interactive multimedia applications, e.g. (Near) Video-on-Demand applicati
4、ons, navigation and browsing applications. Source ITU-T Recommendation T.172 was prepared by ITU-T Study Group 16 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 6th of February 1998. This Recommendation is technically aligned with the International Standard ISO/IEC 135
5、22-5. _ _ STDmITU-T RECMN TmL72-ENGL 1998 4862591 0649014 75T = FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the IT. The IT-T is respo
6、nsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the
7、 ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary stand
8、ards 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 administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibi
9、lity that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by IT members or others outside of the
10、Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest in
11、formation and are therefore strongly urged to consult the TSB patent database. O ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the
12、 ITU. Recommendation T.172 (02/98) 11 CONTENTS 1 1.1 1.2 2 3 4 4.1 4.2 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.1 1 5.12 5.13 5.14 5.15 5.16 5.17 6 7 7.1 Scope Specificity of the scope Issues outside the scope of this Recommendation . Nonnative references Tenns and definitions . Conformance Conf
13、ormance of MHEG-5 objects Conformance of MHEG-5 engines . 4.2.1 Conformance to the acceptance of a set of Classes and Elementary Actions 4.2.2 4.2.3 Overview of the MHEG-5 classes Root Conformance to a set of engine functionality . Additional requirements for conformance specification . Group Applic
14、ation . Ingredient Scene . Link . Action . Program Palette, Font, and CursorShape Variable Presentable TokenGroup ListGroup Stre am . Audio Interactible Visible . Structure of this Recommendation . Notations . Attributes 7.1.1 Inherited attributes . Recommendation T.172 (02198) Page 1 1 1 1 2 3 3 4
15、4 4 5 7 9 9 -9 9 9 10 10 10 11 11 11 12 12 12 12 13 13 14 14 14 15 . 111 STD=ITU-T RECMN T-172-ENGL 1998 4862593 064901b 522 m 7.2 7.3 7.4 7.5 8 8.1 8.2 8.3 8.4 8.5 9 9.1 9.2 9.3 9.4 9.5 10 10.1 10.2 10.3 10.4 10.5 11 11.1 7,1.2 Own exchanged attributes . 7.1.3 Own internal attributes Events . Inter
16、nal behaviours . Effect of MHEG-5 actions Formal description Root Class . Attributes 8.1.1 Inherited attributes . 8.1.2 Own exchanged attributes . 8.1.3 Own internal MHEG-5 attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Group Class Attribut es 9.1.2 Own exchang
17、ed attributes . 9.1.3 Own internal attributes 9.1.1 Inherited attributes . Events . Internal behaviours . Effect of MHEG-5 actions Formal description Application Class Attribut es 1 O . 1.1 Inherited attributes . 1 O . 1.2 Own exchanged attributes . 1 O . 1.3 Own internal attributes Events . Interna
18、l behaviours . Effect of MHEG-5 actions Formal description Scene Class . Attributes Page 15 15 15 15 16 16 16 16 16 16 17 17 18 20 20 20 21 21 21 22 22 23 23 24 25 25 25 25 28 28 29 29 36 36 36 iv Recommendation T.172 (02/98) 11.2 1.3 1.4 1.5 2 2.1 12.2 12.3 12.4 12.5 13 13.1 13.2 13.3 13.4 13.5 14
19、14.1 14.2 14.3 14.4 14.5 15 1 1.1 . 1 Inherited attributes . 1 1,1.2 Own exchanged attributes . 1 1 . 1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption Ingredient Class Attributes 12.1.1 Inherited attributes . 12.1.2 Own exchanged attributes . 12.1
20、.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption Link Class . Attributes 13.1.1 Inherited attributes . 13.1.2 Own exchanged attributes . 13.1.3 Own internal aitributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Progr
21、am Class . Attributes 14.1.1 Inherited attributes . 14.1.2 Own exchanged attributes . 14.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description ResidentProgram Class . Recommendation T.172 (02/98) Page 36 37 38 38 39 39 44 44 44 44 45 46 47 47 47 50 50
22、 50 50 50 51 51 51 51 52 53 53 53 53 53 53 54 54 56 57 V STD-ITU-T RECMN TeL72-ENGL 1998 m 4862591 Obq018 3T5 15.1 15.2 15.3 15.4 15.5 16 16.1 16.2 16.3 16.4 16.5 17 17.1 17.2 17.3 17.4 17.5 18 18.1 18.2 18.3 18.4 18.5 Attributes 15.1.1 Inherited attributes . 1 5.1.2 Own exchanged attributes . 15.1.
23、3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption RemoteProgram Class Attributes 16.1.1 Inherited attributes . 16.1.2 Own exchanged attributes . 16.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description
24、 InterchangedProgram Class Attributes 17.1.1 Inherited attributes . 17.1.2 Own exchanged attributes . 17.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Palette Class Attributes 18.1.1 Inherited attributes . 18.1.2 Own exchanged attributes . 18.
25、1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption Page 57 57 57 57 57 57 57 57 58 58 58 58 58 58 58 59 59 59 59 59 59 59 60 60 60 60 60 60 60 60 60 60 60 61 61 vi Recommendation T.172 (02/98) 19 19.1 19.2 19.3 19.4 19.5 20 20.1 20.2 20.3 20.4 20.5
26、21 21.1 21.2 21.3 21.4 21.5 22 22.1 22.2 22.3 22.4 STD-ITU-T RECMN ToL72-ENGL 1998 m 48b259L Ob49039 231 Page Font Class . Attributes 19.1.1 Inherited attributes . 19.1.2 Own exchanged attributes . 19.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnpti
27、on Cursorshape Class Attributes 20.1.1 Inherited attributes . 20.1.2 Own exchanged attributes . 20.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Variable Class . Attributes 2 1.1.1 Inherited attributes . 2 1.1.2 Own exchanged attributes . 2 1.
28、1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description BooleanVariable Class . Attributes 22.1.1 Inherited attributes . 22.1.2 Own exchanged attributes . 22.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions 61 61 61 61
29、 61 61 61 61 61 62 62 62 62 62 62 62 62 62 62 63 63 63 63 63 63 63 65 65 65 65 65 66 66 66 66 Recommendation T.172 (02/98) vii 22.5 23 23.1 23.2 23.3 23.4 23.5 24 24.1 24.2 24.3 24.4 24.5 25 25.1 25.2 25.3 25.4 25.5 26 26.1 26.2 26.3 Formal description IntegerVariable Class . Attributes 23.1.1 Inher
30、ited attributes . 23.1.2 Own exchanged attributes . 23.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description OctetStnngVariable Class Attributes 24.1.1 Inherited attributes . 24.1.2 Own exchanged attributes . 24.1.3 Own internal attributes Events . In
31、ternal behaviours . Effect of MHEG-5 actions Formal description ObjectRefVariable Class Attributes 25.1.1 Inherited attributes . 25.1.2 Own exchanged attributes . 25.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description ContentRefVariable Class Attrib
32、utes 26.1.1 Inherited attributes . 26.1.2 Own exchanged attributes . 26.1.3 Own internal attributes Events . Internal behaviours . Page 66 66 66 66 66 66 66 67 67 69 69 69 69 69 69 69 69 70 70 70 70 71 71 71 71 71 71 71 71 71 71 71 72 72 72 . VI11 Recommendation T.172 (02/98) 26.4 26.5 27 27.1 27.2
33、27.3 27.4 27.5 28 28.1 28.2 28.3 28.4 28.5 29 29.1 29.2 29.3 29.4 29.5 30 30.1 30.2 Effect of MHEG-5 actions Formal description Presentable Class Attributes 27.1.1 Inherited attributes . 27.1.2 Own exchanged attributes . 27.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5
34、actions Formal description TokenManager Class Attributes 28.1.1 Inherited attributes . 28.1.2 Own exchanged attributes . 28.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description TokenGroup Class Attributes 29.1.1 Inherited attributes . 29.1.2 Own exch
35、anged attributes . 29.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description ListGroup Class Attributes 30.1.1 Inherited attributes . 30.1.2 Own exchanged attributes . 30.1.3 Own internal attributes Events . Page 72 72 72 72 72 72 72 72 73 73 73 73 74
36、74 74 75 75 75 76 77 77 77 77 78 78 78 78 79 79 80 80 80 80 81 83 Recommendation T.172 (02/98) ix - - . - STD=ITU-T RECMN T.172-ENGL 1998 m YBb2591 Ob49022 82b m 30.3 30.4 30.5 31 31.1 31.2 31.3 31.4 31.5 32 32.1 32.2 32.3 32.4 32.5 33 33.1 33.2 33.3 33.4 33.5 34 34.1 Internal behaviours . Effect of
37、 MHEG-5 actions Formal descnption Visible Class . Attributes 3 1.1.1 Inherited attributes . 3 1 . 1.2 Own exchanged attributes . 3 1.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption Bitmap Class . Attributes 32.1.1 Inherited attributes . 32.1.2 Ow
38、n exchanged attributes . 32.1.3 Own internal attributes . Events Internal behaviours . Effect of MHEG-5 actions Formal description LineArt Class Attributes 33.1.1 Inherited attributes . 33.1.2 Own exchanged attributes . 33.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 a
39、ctions Formal description Rectangle Class Attributes 34.1.1 Inherited attributes . 34.1.2 Own exchanged attributes . 34.1.3 Own internal attributes Page 84 86 91 91 91 91 91 92 92 93 93 98 99 99 99 99 99 100 100 100 101 101 101 101 101 103 103 103 103 106 106 106 106 106 107 X Recommendation T.172 (
40、02/98) STD-ITU-T RECMN T.172-ENGL 1998 4862593 Ob49023 762 34.2 34.3 34.4 34.5 35 35.1 35.2 35.3 35.4 35.5 36 36.1 36.2 36.3 36.4 36.5 37 37.1 37.2 37.3 37.4 37.5 38 38.1 Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption DynamicLineArt Class . Attributes 3 5.1 1 Inherited att
41、ributes . 35.1.2 Own exchanged attributes . 35.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption . Text Class . Attributes 36.1.1 Inherited attributes . 36.1.2 Own exchanged attributes . 36.1.3 Own internal attributes Events . Internal behaviours .
42、 Effect of MHEG-5 actions Formal descnption Stream Class . Attributes 37.1.1 Inherited attributes . 37.1.2 Own exchanged attributes . 37.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption Audio Class Attributes 3 8.1 1 Inherited attributes . . Page
43、107 107 107 107 107 107 107 107 107 107 107 108 114 114 114 115 115 117 118 118 118 120 120 120 120 121 121 123 124 124 127 127 128 128 Recommendation T . 172 (02/98) xi STD.ITU-T RECMN T.172-ENGL 1998 4862591 Ob49024 bT9 m 38.2 38.3 38.4 38.5 39 39.1 39.2 39.3 39.4 39.5 40 40.1 40.2 40.3 40.4 40.5
44、41 41.1 41.2 41.3 41.4 41.5 42 xii 38.1.2 Own exchanged attributes . 3 8.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Video Class . Attributes 39.1.1 Inherited attributes . 3 9.1.2 Own exchanged attributes . 39.1.3 Own internal attributes Eve
45、nts . Internal behaviours . Effect of MHEG-5 actions Formal description RTGraphics Class . Attributes 40.1.1 Inherited attributes . 40.1.2 Own exchanged attributes . 40.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descnption Interactible Class Attributes
46、 4 1.1 1 Inherited attributes . 4 1.1.2 Own exchanged attributes . 4 1 . 1.3 Own internal attributes . Events . Internal behaviours . Effect of MHEG-5 actions Formal description Slider Class . Recommendation T.172 (02198) Page 128 128 128 128 129 129 130 130 130 130 130 130 131 131 131 132 132 132 1
47、32 132 132 132 133 133 133 133 133 133 134 135 136 136 138 138 STDmITU-T RECMN T-172-ENGL 1998 4862591 Ob47025 535 42.1 42.2 42.3 42.4 42.5 43 43.1 43.2 43.3 43.4 43.5 44 44.1 44.2 44.3 44.4 44.5 45 45.1 45.2 45.3 45.4 45.5 Attributes 42.1.1 Inherited attributes . 42.1.2 Own exchanged attributes . 4
48、2.1.3 Own internal attributes Events . Internal behaviour . Effect of MHEG-5 actions Formal description EntryField Class . Attributes 43.1.1 Inherited attributes . 43.1.2 Own exchanged attributes . 43.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal descript
49、ion HyperText Class . Attributes 44.1.1 Inherited attributes . 44.1.2 Own exchanged attributes . 44.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Button Class . Attributes 45.1.1 Inherited attributes . 45.1.2 Own exchanged attributes . 45.1.3 Own internal attributes Events . Internal behaviours . Effect of MHEG-5 actions Formal description Page 138 138 138 141 141 141 141 144 144 144 144 145 146 146 147 147 149 149 149 149 149 149 149 150 150 150 150 151 151 151 151 151 152 152 153 . Recommendati
