Voorbeeld. norm NEN-ISO/IEC Preview

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1 Nederlandse norm NEN-ISO/IEC Informatietechnologie - Codering van multimedia- en hypermedia-informatie - Deel 1 : MHEG objectweergave - Basisnotatie (ASN.1) (ISO/IEC :1997) Information technology - Coding of multimedia and hypermedia information - Part 1 : MHEG object representation - Base notation (ASN.1) (ISO/IEC :1997) 1 e druk, augustus 1997 ICS Als Nederlandse norm is aanvaard: Dit document mag slechts op een stand-alone PC worden geinstalleerd. Gebruik op een netwerk is alleen. toestaan als een aanvullende licentieovereenkomst voor netwerkgebruik met NEN is afgesloten. This document may only be used on a stand-alone PC. Use in a network is only permitted when a supplementary license agreement for us in a network with NEN has been concluded. - ISO/IEC :1997 Normcommissie "Multimedia/Hypermedia" Behoudens uitzondering door de wet gesteld mag zonder schriftelijke toestemming van het Nederlands Normalisatieinstituut niets uit deze uitgave worden verveelvoudigd en/of openbaar gemaakt door middel van fotokopie, microfilm, opslag in computerbestanden of anderszins, hetgeen ook van toepassing is op gehele of gedeeltelijke bewerking. Het Nederlands Normalisatie-instituut is met uitsluiting van ieder ander gerechtigd de door derden verschuldigde vergoedingen voor verveelvoudiging te innen en/of daartoe in en buiten rechte op te treden, voor zover deze bevoegdheid niet is overgedragen c.q. rechtens toekomt aan de Stichting Reprorecht. Hoewel bij deze uitgave de uiterste zorg is nagestreefd, kunnen fouten en onvolledigheden niet geheel worden uitgesloten. Het Nederlands Normalisatie-instituut en/of de leden van de commissies aanvaarden derhalve geen enkele aansprakelijkheid, ook niet voor directe of indirecte schade, ontstaan door of verband houdende met toepassing van door het Nederlands Normalisatieinstituut gepubliceerde uitgaven. Nederlands Normalisatie-instituut 1997 Nederlands Normalisatie-instituut Kalfjeslaan 2, Postbus 50Б9, 2600 GB Delft Telefoon (015) , Fax (015)

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3 INTERNATIONAL STANDARD lso/iec l First edition l 5 Information technology - Coding of multimedia and hypermedia information - Part I: MHEG object representation - Base notation (ASN.1) Technologies de i informa tion - Codage de / information multim6dia et hypermkdia - Partie 7: Repr&entation d objet MHEG - Notation de base (ASN. I) Reference number ISO/I EC I : 1997(E)

4 lso/iec l :1997(E) Contents 0 INTRODUCTION... xl 0.1 Application domains for requirements analysis... xii 0.2 Multimedia/Hypermedia application requirements... xlii 0.3 Rationale for standardisation of multimedia and hypermedia information... xliv 0.4 This part of ISO/IEC objectives... XIV Interchange... XIV Presentation... XIV Minimal resources... XIV Real time... xlvi 0.5 Concepts of this part of ISO/IEC xlvi Object orientation,...,i ~... xlvi Encoding ~...~... Overview of the MHEG classes D...~ Content class... xlviii Multiplexed content class... xlviii Composite class... xlviii Action class... xlviii Elementary actions... xlix Get actions... xlix Link class...~...~... xlix Script class...~...~... xlix Descriptor class...~...~ I Container class,...,...~...~......,... I Run-time objects (t-t-objects) ~...~...~...~... I Channels ~...~......~......,... I xlvii ISO/IEC 1997 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, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office l Case postale 56 0 CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii

5 0 ISO/IEC lso/iec 13522=1:1997(E) 0.6 The MHEG application interface... I 0.7 Extensibility of this part of ISO/IEC I. 0.8 Liaisons.,...*...*...*...,..*...,...,,,...,..., II SCOPE l Specificity of the scope Issues outside the scope of this part of ISO/IEC CONFORMANCE Profiles Syntax Semantics... 2 NORMATIVE REFERENCES... 2 DEFINITIONS... 3 SYMBOLS AND ABBREVIATIONS SECTION 1: OVERVIEW MAIN FEATURES OF THIS PART OF ISO/IEC Interchanging multimedia objects The object-oriented approach Object classes Subclasses and inheritance Polymorphism Objects and object life cycles Technical features Object composition for interchange and presentation Run-time objects Individual behaviour common to all n-objects created from a given model object Synchronisation Links Input Event handling Anchor Real time Object management Object identification Object reference Object content Uniform objects *... 18

6 lso/iec :1997(E) 0 ISO/IEC Minimal resources Presentation and structuring dynamism Macro action and link Static and dynamic assignment of generic value MHEG ENGINE ASSUMPTIONS Handling and Interchange of objects The MHEG application interface Exception handling METHODOLOGY Modularity Methodology of representation of MHEG objects Level A: Description of representation Level B: Precise object-oriented definition Level C: Isomorphic notations for the structure of MHEG objects ASN.l techniques used in level C Copyright protection Level D: Coded representation of MHEG objects SECTION 2: GENERIC UTILITY AND USEFUL DEFINITION MECHANISMS PRESENTATION MECHANISM Presentation space (PS) l Temporal axis Spatial axes Audible volume range (AVR) Original presentation space (OPS) lnitialisation of OS and OD lnitialisation of GF lnitialisation of attributes for t-t-components lnitialisation of attributes for n-contents Channel presentation space (CPS) Relative presentation space (RPS) CPS mapping GENERIC IDENTIFICATION MECHANISM External identification l Public identifier System identifier Internal identification iv

7 0 ISOAEC lso/iec l :1997(E) MHEG Identifier Root Rt ID Channel identifier Composition element index Container element identification Socket identifier Stream identifier Symbolic identification GENERIC REFERENCE MECHANISM l Generic reference using generic identification Predefined references ? reference GENERIC VALUE Generic boolean Generic numeric Generic integer Generic ratio Generic string Generic reference Generic list MACRO MECHANISM HOOKS EXTENSIBILITY Catalogues Incorporation of New MHEG object classes Provision for extensibility SECTION 3: OVERVIEW OF MHEG CLASSES MHEG OBJECT CLASSES OVERVIEW STRUCTURE OF MH-OBJECT CLASS Class identification MHEG ID General object information STRUCTURE OF ACTION CLASS Elementary actions Basic action object Nested action object Macro action object V

8 ISOAEC l :1997(E) 0 ISO/IEC 19 STRUCTURE OF LINK CLASS Link Condition l Trigger condition ~...~ Constraint condition * Source value Comparison value Previous condition Current condition Comparison operator Logical combination Logical operator Link Effect Basic link object Nested link object Macro link object QQQQQQQQQQQQQbQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ 20 STRUCTURE OF MODEL CLASS 67 QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ.QQQQQQQQQQQQ.Q.QQQQQ.QQQQQQQQQQQQ.QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ.QQQQQQ 21 STRUCTURE OF SCRIPT CLASS STRUCTURE OF COMPONENT.Q..QQ..QQ.QQQ...QQQQQQQQQQQ..Q..Q.Q.QQ.Q.QQ.Q..QQQQQQQQ.Q.QQQ..Q..QQQQ.Q.QQ.QQQQQQQQQQQQQ..QQQQQQ.Q.QQQ..QQ.QQQ... CLASS STRUCTURE OF CONTENT CLASS 68 QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ 24 STRUCTURE OF MULTIPLEXED CONTENT CLASS STRUCTURE OF COMPOSITE CLASS QQQQQQQQQQQQQQQQQQQQQQQ~QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Availability Start-up Availability Close-down Rt-Availability Start-up W-Availability Close-down Composition Element Composition example STRUCTURE OF CONTAINER CLASS Container Start-up Container Close-down Container Element QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ 27 STRUCTURE OF DESCRIPTOR CLASS Related Object l Script Class Information Content Class Information MUX Content Class Info Alternative Object vi

9 0 ISO/IEC lso/iec l :1997(E) Offset Other Descriptor Readme System Readable Material Channel Information Catalogued Style Information Cat Ext elementary action Info Cat Ext Attribute Info SECTION 4: COMMON BEHAVIOUR OF MHEG ENTITIES...Q...Q..QQQQQQQQQQQQ..QQQQQQQQQQQQ..QQ..QQQQ.QQ MHEG ENTITY BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOOQQQQQQQQQQQQQ 29 MHEG ENTITY STATE DEFINITION QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQ MHEG object availability Link activation Channel availability Rt-object availability Rt-Component running behaviour Rt-Component presentation behaviour LIFE CYCLE OF MHEG ENTITIES QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ 31 GENERAL ACTION MECHANISMS l Action handling Processing of link effect Serial action processing Parallel action processing Basic processing of an elementary action Resolution of target set Arithmetic precision COMMON ACTION EFFECTS AND HANDLING QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Elementary actions Get actions Recommended exception handling POSTPONE BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ*QQQQQQQQQQQQQQQQ*QQQQQQQQQQQQQQ.QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Actions to change the behaviour Delay action l Delay action effect Delay additional error conditions vii

10 lso/iec l :1997(E) 0 ISO/IEC 34 RETURNABILITY BEHAVIOUR Q~~~Q~~Q~~~~QQQ~~~Q~~~~~~~~~~~~Q~~~~~~~~~QQ~~~~~~~~~~~~~~~~*~~~~QQ~~Q*QQ~QQQQ*QQ~QQQQQ~~Q*QQQQQQQQQQQ~QQQQQQQQQQQQQQQQQ~QQ~QQQQ Behaviour attributes and statuses Actions to change the behaviour Return action l Return action effect Return additional error conditions ALIAS BEHAVIOUR Behaviour attributes and statuses Actions to change the behaviour Set Alias action l Set Alias action effect Set Alias additional error conditions EXTENSIBILITY BEHAVIOUR Behaviour attributes and statuses Catalogued Attribute Actions to change the behaviour Catalogued Elementary Action action l Catalogued Elementary action effect Catalogued Elementary Action additional error conditions Set Catalogued Attribute action Set Catalogued Attribute action effect Set Catalogued Attribute additional error conditions Actions to retrieve the behaviour Get Catalogued Attribute action l Get Catalogued Attribute action effect Get Catalogued Attribute additional error conditions SECTION 5: BEHAVIOUR OF MHEG OBJECTS QQQQQQQQQQQQQQQQQ~QQQQQQQ~~Q~Q~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AVAILABILITY BEHAVIOUR OF MHEG OBJECTS Behaviour attributes and statuses Preparation Status Actions to change the behaviour Prepare action Prepare action effect Prepare additional error conditions Destroy action Destroy action effect VIII

11 0 ISO/IEC ISOAEC : 1997(E) Destroy additional error conditions Actions to retrieve the behaviour Get Preparation Status action l MHEG effect Get Preparation Status additional error conditions LINK OBJECT ACTIVATION BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Activation Status Actions to change the behaviour Activate action l Activate action targeted to a single link object Activate additional error conditions Deactivate action Deactivate action effect Deactivate additional error conditions Actions to retrieve the behaviour Get Activation Status action l Get activation status targeted to a link object Get Activation Status additional error conditions LINK OBJECT ABORT BEHAVIOUR Behaviour attributes and statuses Actions to change the behaviour Link Abort action l Link Abort action effect Link Abort additional error conditions CONTENT CLASS GENERIC VALUE STORAGE BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Data Actions to change the behaviour Set Data action l Set Data targeted to a single content object Set Data additional error conditions Add action Add action effect Add additional error conditions Substract action Subtract targeted to a single content object ix

12 ISOAEC 13522=1:1997(E) 0 ISO/IEC Substract additional error conditions Actions to retrieve the behaviour Get Data action l Get Data targeted to a content object Get Data additional error conditions CONTENT CLASS COPY BEHAVIOUR QQOQQQOQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQ l Behaviour attributes and statuses Actions to change the behaviour Copy action l Copy action effect Copy additional error conditions SECTION 6: RT-OBJECTS BEHAVIOUR Q..QQQ...Q.Q...QQ.Q...Q..Q.QQ.Q..Q.Q...Q...Q RT-OBJECTS AVAILABILITY BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Rt-Availability Status Actions to change the behmiour New action l New action effect New additional error conditions Delete action Delete action effect Delete additional error conditions Actions to retrieve the behaviour Get Rt-Availability Status action l Get Rt-availability Status targeted to rt-object Get Rt-Availability Status additional error conditions RT-OBJECTS RUNNING BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Running Status Actions to change the behaviour Run action l MHEG effect of Run targeted to a single t-t-object User effect of Run targeted to a single rt-object Run additional error conditions Stop action Stop targeted to a single rt-object X

13 0 ISO/IEC ISOAEC l :1997(E) Stop additional error conditions Actions to retrieve the behaviour Get Running Status action l MHEG effect Get Running Status additional error conditions RT-SCRIPT PASSING PARAMETER BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Actions to change the behaviour Set Parameters action l Set Parameter action effect Set Parameters additional error conditions RT-SCRIPTS TERMINATION BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQQQQQOQOQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Termination Status Actions to retrieve the behaviour Get Termination Status action l Get Termination Status action effect Get Termination Status additional error conditions SOCKETS PRESENTATION AND STRUCTURAL DYNAMISM BEHAVIOUR QQQQQQQQQQQQ~~~~~~Q~Q~~~QQQQ~~Q~~~~~~~~Q~QQQQQQQQ Behaviour attributes and statuses Actions to change the behaviour Plug action l Plug action effect Plug additional error conditions RT-COMPOSITE NAVIGATION BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses Rt-Composite Address Navigation Command Child EmptyChild Sibling Ancestor Actions to retrieve the behaviour Get Rt-Composite Address action l Get Rt-Composite Address effect Get Rt-Composite Address additional error conditions xi

14 ISOAEC :1997(E) 0 ISOAEC QQQQQQQQQQQ~QQQ~~QQQQQ~~~~~~~~QQQ~~~~~QQ~~Q~~~~~~~~~~~~QQQQQQQQQQQQQQQQQQQQQQQQQQ~~~~~~~ 48 RT-COMPONENTS RI S ASSIGNMENT BEHAVIOUR Behaviour attributes and statuses RPS Assignment Actions to change the behaviour Set RPS Assignment action l Set RPS Assignment action effect Set RPS Assignment additional error conditions Actions to retrieve the behaviour Get RPS Assignment action l Get RPS Assignment action effect Get RPS Assignment additional error conditions RT-COMPONENTS PERCEPTABILITY BEHAVIOUR QQQQQQQQQQQQ~~QQQQQQQQ~~~~~~~~QQQ~~~~~~~~~~~Q~QQ~~~~~~~QQQQ~~~~~~~QQ~~QQ~~~~~QQ~~~~~~~Q~ Behaviour attributes and statuses Perceptability Presentation Priority Actions to change the behaviour Set Perceptability action l Set Perceptability action effect Set Perceptability additional error conditions Set Presentation Priority action Set Presentation Priority action effect Set Presentation Priority additional error conditions Actions to retrieve the behaviour Get Perceptability action l Get Perceptability action effect Get Perceptability additional error conditions Get Presentation Priority action Get Presentation Priority action effect Get Presentation Priority additional error conditions RT-COMPONENTS TEMPORAL BEHAVIOUR QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ Behaviour attributes and statuses OD POD OVD PVD Temporal Termination PVD Position xii

15 0 ISO/IEC ISOAEC l :1997(E) 50.8 CTP...**...*...m...m...mm.* GTF...*...m..m...* Timestone Status Timestone ID Expected OVD Result Expected PVD Result Actions to change the behaviour Set OVD action l Set OVD effect Set OVD additional error conditions Set CTP action Set CTP effect Set CTP additional error conditions Set Temporal Termination action Set Temporal Termination effect Set Temporal Termination additional error conditions Set PVD Position action Set PVD Position effect Set PVD Position additional error conditions Set GTF action l Set GTF effect Set GTF additional error conditions Set Timestones action Set Timestones action effect Set Timestones additional error conditions Actions to retrieve the behaviour Get OD action l Get OD action effect Get OD additional error conditions Get POD action Get POD action effect Get POD additional error conditions Get OVD action Get OVD action effect Get OVD additional error conditions Get PVD action Get PVD action effect XIII

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