SIST ETS 300 715 E1:2003

SLOVENSKI STANDARD
01-december-2003
Terminalska oprema (TE) – Prikaz izmenjave skriptov po MHEG (MHEG-SIR)
Terminal Equipment (TE); MHEG script interchange representation (MHEG-SIR)
Ta slovenski standard je istoveten z: ETS 300 715 Edition 1
ICS:
33.160.60 9HþSUHGVWDYQLPXOWLPHGLMVNL Multimedia systems and
VLVWHPLLQRSUHPD]D teleconferencing equipment
WHOHNRQIHUHQFH
35.180 Terminalska in druga IT Terminal and other
periferna oprema IT peripheral equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 715
TELECOMMUNICATION June 1997
STANDARD
Source: ETSI TC-TE Reference: DE/MTA-001047
(formerly DE/TE-01047)
ICS: 33.020
Key words: AVI, MHEG, MHI, multimedia
Terminal Equipment (TE);
MHEG script interchange representation (MHEG-SIR)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

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ETS 300 715: June 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword .11
Introduction.11
1 Scope .13
2 Normative references.13
3 Definitions.14
3.1 Definitions .14
3.2 Abbreviations .17
4 General.18
5 Conformance.18
5.1 Information object conformance .18
5.1.1 Profiles .18
5.1.2 Encoding .19
5.1.3 Syntax.19
5.1.4 Semantics.19
5.2 Implementation conformance .19
5.2.1 Conformance requirements.19
5.2.2 Conformance documentation.20
5.3 Application conformance .20
5.4 Test Methods .20
6 Overview .20
6.1 Description methodology .20
6.2 Data processing operations .21
6.3 Access to external data and functions.21
7 MHEG/MHEG-3 relationship .22
7.1 MHEG entities.22
7.2 Functional entities.22
7.3 MHEG-SIR script interpreter.23
8 Elements of MHEG-SIR .23
8.1 Data types.23
8.1.1 Predefined types.24
8.1.1.1 Primitive types .25
8.1.1.1.1 void type.25
8.1.1.1.2 octet type .25
8.1.1.1.3 short type .25
8.1.1.1.4 long type .25
8.1.1.1.5 unsigned short type.25
8.1.1.1.6 unsigned long type.25
8.1.1.1.7 float type .26
8.1.1.1.8 double type .26
8.1.1.1.9 boolean type .26
8.1.1.1.10 character type .26
8.1.1.1.11 data identifier type.26
8.1.1.1.12 object reference type .26
8.1.1.2 Predefined constructed types .26
8.1.2 Declared constructed types.26
8.1.2.1 sequence types.27
8.1.2.2 string types .27

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8.1.2.3 array types. 28
8.1.2.4 structure types. 28
8.1.2.5 union types. 28
8.2 Data. 29
8.2.1 Immediate values. 29
8.2.2 Constants. 29
8.2.3 Variables. 30
8.2.3.1 Global variables . 30
8.2.3.2 Local variables . 30
8.2.3.2 Dynamic variables. 30
8.3 Functions. 31
8.3.1 Routines. 31
8.3.2 Services . 32
8.3.3 Predefined functions. 32
8.4 Messages. 32
8.4.1 Package exceptions. 32
8.4.2 Predefined messages. 33
8.5 Instructions. 33
8.6 Identifiers. 33
8.6.1 Type identifiers . 33
8.6.2 Data identifiers. 34
8.6.3 Function identifiers. 34
8.6.4 Message identifiers. 34
9 The MHEG-SIR virtual machine . 34
9.1 Structure of the MHEG-SIR virtual machine . 34
9.2 Structures and notations . 35
9.2.1 Table. 35
9.2.2 Stack. 35
9.2.3 Parameter stack . 35
9.2.4 Queue . 36
9.2.5 Data representation . 36
9.3 Memory areas . 37
9.3.1 Mh-script memory areas. 37
9.3.1.1 Data areas. 37
9.3.1.1.1 Type definition table . 37
9.3.1.1.2 Constant table . 37
9.3.1.1.3 Global variable definition table . 37
9.3.1.2 Code areas. 37
9.3.1.2.1 Routine definition table. 38
9.3.1.2.2 Package definition table . 38
9.3.1.2.3 Service definition table . 38
9.3.1.2.4 Exception definition table . 39
9.3.1.2.5 Handler definition table. 39
9.3.1.2.6 Program code area . 39
9.3.2 Rt-script memory areas . 39
9.3.2.1 Dynamic memory areas . 39
9.3.2.1.1 Variable table . 40
9.3.2.1.2 Call stack. 40
9.3.2.1.3 Parameter stack. 40
9.3.2.1.4 Message queue. 41
9.3.2.1.5 Heap. 41
9.3.2.2 Registers. 41
9.3.2.2.1 Instruction pointer register. 42
9.3.2.2.2 Instruction register. 42
9.3.2.2.3 Error register . 42
9.3.2.2.4 Stack pointer register . 42
9.3.2.2.5 Frame pointer register. 42
9.3.2.2.6 Queue pointer register . 42
9.3.2.2.7 Function register . 42
9.4 Script statuses. 42
9.4.1 Mh-script statuses. 42
9.4.1.1 Not available . 42

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9.4.1.2 Available .43
9.4.2 Rt-script statuses.43
9.4.2.1 Not ready .43
9.4.2.2 Ready .43
9.4.2.3 Running .43
9.4.2.4 Erroneous .44
9.5 Processing units.44
9.5.1 Message reception.44
9.5.1.1 MHEG-3 API operations .44
9.5.1.2 External exception .44
9.5.1.3 InstructionExecutionError exception.45
9.5.1.4 MHEG-3 API exception.45
9.5.2 Mh-script initialization .45
9.5.3 Rt-script initialization.45
9.5.4 Rt-script execution unit.45
9.5.5 MHEG-SIR instruction execution unit.46
10 Provisions for run-time environment access .46
10.1 General model .46
10.2 Declaration of IDL interfaces .46
10.3 Invocation of external operations in an MHEG-SIR program.47
10.4 Handling of external exceptions in an MHEG-SIR program .47
10.5 Invocation of external operations by an MHEG-3 engine .48
10.6 Handling of external exceptions by an MHEG-3 engine .48
10.7 Platform mapping specifications.48
11 Provisions for MHEG object manipulation.48
11.1 Invoking MHEG actions .48
11.1.1 Sending messages to other scripts .49
11.1.2 Exchange of information with MHEG objects.49
11.2 Receiving MHEG messages.49
11.2.1 MHEG-3 API run operations.49
11.2.2 MHEG API exceptions.49
12 MHEG-SIR declarations.50
12.1 Type declaration .50
12.1.1 Type identifier.50
12.1.2 Type description .51
12.1.2.1 String description.51
12.1.2.2 Sequence description .51
12.1.2.3 Array description.51
12.1.2.4 Structure description.51
12.1.2.5 Union description.51
12.2 Constant declaration.52
12.2.1 Data identifier .52
12.2.2 Type identifier.52
12.2.3 Constant value .52
12.3 Global variable declaration .53
12.3.1 Data identifier .53
12.3.2 Type identifier.53
12.3.3 Constant reference.53
12.4 Package declaration .53
12.4.1 Package identifier.54
12.4.2 Name.54
12.4.3 Service description .54
12.4.3.1 Function identifier .54
12.4.3.2 Name .54
12.4.3.3 Calling mode.54
12.4.3.4 Type identifier .55
12.4.3.5 Parameter description .55
12.4.3.5.1 Passing mode .55
12.4.3.5.2 Type identifier .55
12.4.4 Exception description .55

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12.4.4.1 Message identifier. 55
12.4.4.2 Name . 56
12.4.4.3 Parameter description. 56
12.5 Handler declaration . 56
12.5.1 Message identifier. 56
12.5.2 Function identifier . 56
12.6 Routine declaration . 56
12.6.1 Function identifier . 57
12.6.2 Type identifier . 57
12.6.3 Parameter description. 57
12.6.3.1 Passing mode . 57
12.6.3.2 Type identifier. 57
12.6.4 Local variable declaration . 57
12.6.4.1 Data identifier. 57
12.6.4.2 Type identifier. 58
12.6.4.3 Constant reference . 58
12.6.5 Program code . 58
13 MHEG-SIR instructions. 58
13.1 Presentation methodology. 58
13.1.1 Error conditions. 59
13.1.2 Formal specification. 59
13.1.3 Data table notation. 59
13.1.4 Template instruction notation. 60
13.1.5 Primitives . 60
13.2 Classification of MHEG-SIR instructions. 60
13.3 Description of instructions .61
13.3.1 No operation . 61
13.3.2 Yield. 62
13.3.3 Return . 62
13.3.4 Free . 63
13.3.5 Not . 63
13.3.6 Or. 63
13.3.7 Exclusive or . 64
13.3.8 And . 64
13.3.9 Equal reference . 65
13.3.10 Equal. 65
13.3.11 Less than . 66
13.3.12 Greater than. 66
13.3.13 Add . 66
13.3.14 Subtract . 67
13.3.15 Multiply. 67
13.3.16 Divide. 67
13.3.17 Negate . 68
13.3.18 Remainder . 68
13.3.19 Duplicate. 69
13.3.20 Convert . 69
13.3.21 Jump on true. 69
13.3.22 Jump on false . 70
13.3.23 Jump. 70
13.3.24 Shift. 70
13.3.25 Get object reference . 71
13.3.26 Long jump on true. 71
13.3.27 Long jump on false . 72
13.3.28 Long jump. 72
13.3.29 Call. 72
13.3.30 External call . 73
13.3.31 Push. 74
13.3.32 Push reference . 75
13.3.33 Push immediate. 75
13.3.34 Pop . 76
13.3.35 Pop reference . 76
13.3.36 Pop contents. 76

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13.3.37 Allocate.77
13.3.38 Increment .77
13.3.39 Decrement.78
13.3.40 Get.78
13.3.41 Get contents.79
13.3.42 Set .79
13.3.43 Set contents .80
13.4 Type conversion rules.81
13.4.1 Reversible conversions .81
13.4.2 Lossless extensions .81
13.4.2.1 Conversions from boolean.81
13.4.2.2 Conversions from octet to a numeric type.82
13.4.2.3 Lossless conversions from a numeric to a larger numeric
type .82
13.4.3 Lossy extensions.82
13.4.4 Truncations to boolean.82
13.4.5 Truncations between integer or between floating-point types .82
13.4.6 Truncations from floating-point to integer.82
14 IDL mapping to MHEG-SIR.82
14.1 IDL specifications.82
14.2 IDL interfaces and modules.83
14.3 IDL operations.83
14.3.1 Operation name.83
14.3.2 Operation parameters .83
14.3.3 Implicit parameter.83
14.3.4 Return value .83
14.4 IDL attributes.83
14.4.1 Accessor.84
14.4.2 Modifier.84
14.4.3 Readonly attribute .84
14.5 IDL inherited operations.84
14.6 IDL exceptions .84
14.6.1 Exception name.84
14.6.2 Exception members .84
14.6.3 Implicit member.84
14.7 IDL types.84
14.7.1 char type.85
14.7.2 enum type.85
14.7.3 Constructed types .85
14.7.4 any type .85
14.7.5 Restrictions on types .86
14.8 IDL constants.86
15 The MHEG-3 API .86
15.1 ScriptInterpreter object .86
15.1.1 kill operation .86
15.1.2 prepare operation .87
15.2 MhScript object .87
15.2.1 destroy operation.87
15.2.2 new operation.88
15.3 RtScript object.88
15.3.1 delete operation.88
15.3.2 setPriority operation.88
15.3.3 getPriority operation .89
15.3.4 setData operation .89
15.3.5 getData operation.90
15.3.6 allocate operation .90
15.3.7 free operation .91
15.3.8 stop operation.91
15.3.9 reInit operation .91
15.3.10 getRtScriptStatus operation .92
15.3.11 open operation .92

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15.4 RoutineInvocation object. 92
15.4.1 close operation . 93
15.4.2 routine_id readonly attribute . 93
15.4.3 setParameter operation . 93
15.4.4 getPrototype operation. 94
15.4.5 run operation. 94
15.4.6 reset operation. 95
15.4.7 getInvocationStatus operation . 95
Annex A (normative): ASN.1 specification of interchanged scripts . 96
Annex B (normative): Coded representation of interchanged scripts. 99
B.1 Coding for interchanged scripts. 99
B.2 Coding for the program code. 99
B.2.1 Instruction op-codes. 99
B.2.2 Instruction operands. 99
B.2.2.1 Data identifier operands. 99
B.2.2.2 Function identifier operands . 99
B.2.2.3 Miscellaneous numeric operands . 99
Annex C (normative): MHEG-SIR predefined elements . 104
C.1 Predefined types. 104
C.1.1 Primitive types . 104
C.1.2 MHEG API types . 104
C.2 Predefined functions. 105
C.2.1 MHEG API operations. 105
C.2.2 MHEG-3 API operations. 105
C.3 Predefined messages. 105
C.3.1 MHEG-3 API operations. 106
C.3.2 The InstructionExecutionError exception . 106
C.3.3 MHEG-3 API exceptions . 106
C.3.4 MHEG API exceptions. 106
Annex D (normative): IDL Platform mapping specification form. 108
Annex E (normative): MHEG API definition process . 110
E.1 Generic API definition framework. 110
E.1.1 MHEG elements input to MHEG API definition process . 110
E.1.2 IDL elements output by MHEG API definition process. 110
E.1.3 Requirements on the MHEG API definition process . 110
E.1.3.1 Portability . 110
E.1.3.2 Genericity. 111
E.1.3.3 Conformance testability . 111
E.1.3.4 Implementability. 111
E.1.3.5 Fulfilment of technical requirements. 111
E.1.4 General structure of the MHEG API. 111
E.1.5 IDL non-object datatype definition. 112
E.1.5.1 Name mapping . 112
E.1.5.1.1 Data types . 112
E.1.5.1.2 Components. 112
E.1.5.1.3 Values . 112
E.1.5.2 Type mapping . 113
E.1.5.2.1 INTEGER . 113
E.1.5.2.2 BOOLEAN. 113
E.1.5.2.3 OCTET STRING . 113
E.1.5.2.4 ENUMERATED. 113
E.1.5.2.5 SEQUENCE OF. 113

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E.1.5.2.6 CHOICE.114
E.1.5.2.7 SEQUENCE.114
E.1.5.3 Order of declarations.114
E.1.6 IDL interface definition .116
E.1.7 IDL attribute definition.116
E.1.7.1 MHEG interchanged attributes.116
E.1.7.2 MHEG internal attributes .117
E.1.8 IDL operation definition.117
E.1.8.1 Operations mapping MHEG elementary actions.117
E.1.8.2 Operations enabling the deletion of an interface instance .119
E.1.8.3 Operations to attach and detach an interface instance to a MHEG entity.119
E.1.9 IDL exception definition.119
E.2 MHEG API mapping to MHEG-SIR.120
Annex F (normative): IDL specification of the MHEG-3 API .121
Annex G (normative): Relationships with other parts of ISO/IEC 13522 .123
G.1 Relationships with ISO/IEC 13522-1 .123
G.2 Relationships with ISO/IEC 13522-5 .123
Annex H (informative): MHEG-SIR syntax (EBNF notation) .125
Annex J (informative): Textual notation for MHEG-SIR scripts .127
Annex K (informative): MHEG entities .130
K.1 MHEG objects .130
K.2 Mh-objects.130
K.3 Rt-objects .130
K.4 Interchanged MHEG objects .
...