ITU-T T 419-1995 Information Technology - Open Document Architecture (ODA) and Interchange Format Audio Content Architectures - Terminals for Telematic Services 33 pp《信息技术 开放文件体系结构.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU T.419 (08/95) TERMINALS FOR TELEMATIC SERVICES INFORMATION TECHNOLOGY - OPEN DOCUMENT ARCHITECTURE (ODA) AND INTERCHANGE FORMAT: AUDIO CONTENT ARCHITECTURES ITU-T Recommendation T.419 (Previously “CCIIT Recom

2、mendation”) ITU-T RECMN*T-419 95 = 4862591 Ob12447 794 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 ITU. Some 179 member countries

3、, 84 telecom operating entities, 145 scientific and industrial organizations and 38 international organizations participate in ITU-T which is the body which sets world telecommunications standards (Recommendations). The approval of Recommendations by the Members of ITU-T is covered by the procedure

4、laid down in WTSC Resolution No. 1 (Helsinki, 1993). In addition, the World Telecommunication Standardization Conference (WTSC), which meets every four years, approves Recommendations submitted to it and establishes the study programme for the following period. In some areas of information technolog

5、y which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and EC. The text of ITU-T Recommendation T.419 was approved on 1 lth of August 1995. The identical text is also published as ISOAEC International Standard 8613-9. NOTE In this Recommendation, t

6、he expression “Administration” is used for conciseness to indicate both a telecornmunication administration and a recognized operating agency. O ITU 1996 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including ph

7、otocopying and microfilm, without permission in writing from the ITU. i , ITU-T RECMN*T.419 95 4862593 Ob32448 620 CONTENTS Page 1 Scope 2 Normative references . 2.1 Identical Recommendations I International Standards 2.2 Paired Recommendations I International Standards equivalent in technical conte

8、nt 2.3 Additional references 3 Definitions 4 Abbreviations . 5 Conventions 6 General principles 6.1 Content architectures . Formatted processable content architecture class . 6.2 Content 6.3 Presentation attributes . 6.4 Content portion attributes 6.5 Coding of content information 7 Audio positionin

9、g . 6.1.1 7.1 Basic concepts . 7.1.1 Measurement units 7.2 Positioning of elements of sampled sound in a basic layout time frame 7.3 Reference recording level . 8 Audio presentation . Attenuation and temporal envelope 8.1 8.2 Frequency envelope Definition of audio presentation attributes . 9.1 Share

10、d presentation attributes . 9.1.1 Clipping 9.2 Layout presentation attributes . 9.2.1 Attenuation 9.2.2 Temporal envelope 9.2.3 Frequency envelope 9.2.4 Content architecture class . Definition of audio content portion attributes 10.1 Common coding attributes 10.1.1 Type of coding 10.2 Other coding a

11、ttributes 10.2.1 Marker . 10.3 Content information attnbute Formal definitions of audio content architecture dependent data types . 1 1.1 Introduction . 11.2 Representation of document profile attributes 11.3 Representation of presentation attributes 11.4 1 1.5 Representation of non-basic features a

12、nd non-standard defaults 9 10 11 Representation of coding attributes . ITU-T Rec . T.419 (1995 E) 1 2 2 2 2 3 3 3 3 3 4 4 4 4 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 8 9 9 9 9 10 10 10 Il 11 Il 11 12 13 1 m . = Page 12 Content layout process . 12.1 Introduction . 12.1.1 mirpose 12.1.2 Available area . 12.1.3

13、Available time span . 12.1.4 Presentation attributes . 12.1.5 Audio content architecture classes 12.1.6 Association of content . 12.2 Content layout process for audio content 13 Content presentation process 13.1 Introduction . 13.2 Content presentation process for formatted processable form Interact

14、ions with document architecture attributes . Definition of audio content architecture classes . 15.1 Summary of audio presentation attributes . 15.2 Summary of audio content portion attributes 14 15 Annex A - SGML representation of audio content-specific attributes for ODL A.l Introduction . A.2 Nam

15、es and public identifiers . A.3 Representation of attribute values . A.3.1 Constructed parameters . A.3.2 String parameters A.3.3 Keyword parameters . A.3.4 Integer parameters . A.3.5 Real parameters . A.5 Coding attributes . Annex C - Summary of audio content architecture class . A.4 Presentation a

16、ttributes . Annex B - Data type definitions for audio content architecture attributes C . 1 Formatted processable audio content architecture class . C . 1.1 Presentation attributes . (2.1.2 Content portion attributes Annex D - Summary of ASN.1 object identifiers Annex E - Modifications to other part

17、s of ITU-T Rec . T.410-Series I ISOAEC 8613 Modifications to ITU-T Rec . T.411 I ISO/IEC 8613-1 . Modifications to ITU-T Rec . T.412 I ISO/IEC 8613-2 . Modifications to IT-T Rec . T.414 I ISO/IEC 8613-4 . Modifications to ITU-T Rec . T.415 I ISO/IEC 8613-5 . Annex F - Characteristics of audio encodi

18、ng schemes E.l E.2 E.3 E.4 13 13 13 13 13 13 13 14 14 14 14 14 14 16 16 16 17 17 17 17 17 17 17 18 18 18 19 20 21 21 21 22 23 24 24 24 24 24 26 11 ITU-T Rec . T.419 (1995 E) ITU-T RECMN*T.419 95 4862591 Ob32450 289 W Summary This Recommendation I International Standard describes an additional conten

19、t architecture to support the addition of audio content to documents conforming to the Recommendation T.410-Series (ODA). The audio content may be processable or formatted and consist of speech as well as other types of audio. Provision is made for the support of all ITU-standardized audio and speec

20、h coding formats as well as those standardized by other international organizations. ITU-T Rec. T.419 (1995 E) iii ITU-T RECMN*T-419 95 W 4Bh2591 Oh12L(51 115 W Foreword This IT-T Recommendation I International Standard was prepared as a joint publication by TSS Study Group 8 and ISO/IEC Joint Techn

21、ical Committee 1. At present, the ITU-T Recommendations T.410-Series I International Standard ISOAEC 861 3 consists of - Introduction and general principles; - Document structures; - - Document profile; - Open document interchange formats; - Character content architectures; - Raster graphics content

22、 architectures; - Geometric graphics content architectures; - Audio content architectures; - Abstract interface for the manipulation of ODA documents; Formai specification of the Open Document Architecture (FODA) (the use of this Specification is applicable to ISOAEC 86 13 only); - Tabular structure

23、s and tabular layout; - Identification of document fragments; - Temporal relationships and non-linear structures. Further Recommendations I Intemational Standards may be added to this series of IT-T Recommendations I International Standard. Development of this series of ITU-T Recommendations I Inter

24、national Standard was originally in parallel with ECMA- 101: Open Document Architecture. This ITU-T Recommendation I International Standard contains six annexes: - - - - - - Annex A (integral to ISO/IEC only): SGML representation of aidio content-specific attributes for ODL; Annex B (non-integral):

25、Data type definitions for audio content architecture attributes; Annex C (non-integral): Summary of audio content architecture class; Annex D (non-integral): Summary of ASN.l object identifiers; Annex E (integral): Modifications to other common texts of ITU-T Rec. T.410-Series I ISO/iEC 8613; Annex

26、F (non-integral): Characteristics of audio encoding schemes. iv ITU-T Rec. T.419 (1995 E) ITU-T RECMN*T-419 95 m 4862593 Ob32452 051 ISO/LEC 8613-9 : 1996 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION “OLOGY - OPEN DOCUMENT ARCHITECTURE (ODA) AND INTERCHANGE FORMAT: AUDIO CONTENT ARCHI

27、TECTURES 1 Scope The purpose of this ITU-T Rec. T.410-Series I ISOIEC 8613 is to facilitate the interchange of documents. In the context of these Recommendations I Intemational Standards, documents are considered to be items such as memoranda, letters, invoices, forms and reports, which may include

28、pictures and tabular material. The content elements used within the documents may include graphic characters, geometric graphic elements, raster graphic elements and audio elements, all potentially within one document. NOTE - These Recommendations I International Standards are designed to allow for

29、extensions, such as hypermedia features, spreadsheets and additional types of content such as video. In addition to the content types defined in these Recommendations I International Standards, ODA also provides for arbitrary content types to be included in documents. These Recommendations I Interna

30、tional Standards apply to the interchange of documents by means of data communications or the exchange of storage media. These Recommendations I International Standards provide for the interchange of documents for either or both of the following purposes: - - to allow presentation as intended by the

31、 originator; to allow processing such as editing and reformatting. The composition of a document in interchange can take several forms: formatted form, allowing presentation of the document; processable form, allowing processing of the document; formatted processable form, allowing both presentation

32、 and processing. - - - These Recommendations I International Standards also provide for the interchange of ODA information structures used for the processing of interchanged documents. This Recommendation I International Standard: - defines audio content architectures that can be used in conjunction

33、 with the document architecture defined in IT-T Rec. T.412 I ISOEC 8613-2 and ITU-T Rec. T.424 I ISOIEC 8613-14; defines those aspects of rendition applicable to the presentation of audio content; defines the presentation and content portion attributes applicable to these audio content architectures

34、; describes an audio layout and presentation process, which, together with the document processing model described in -T Rec. T.412 I ISOiEC 8613-2, determines the layout of basic layout objects with associated audio content in the spatial and temporal dimensions of a document and the presentation o

35、f audio content on some suitable media. - - - ITU-T Rec. T.419 (1995 E) 1 ITU-T RECMN*T.419 9.5 4862593 Ob32453 T98 W ISO/IEC 8613-9 : 1996 (E) 2 Normative references The following ITU-T Recommendations and International Standards contain provisions which through reference in this text, constitute p

36、rovisions of this Recommendation I International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation i International Standard are encouraged to investigate the possi

37、bility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and IS0 maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU-T maintains a list of currently valid ITU-T Recommendations. 2.1

38、 Identical Recommendations I Internationai Standards - ITU-T Recommendation H.263l) I ISO/IEC 13818-3 .l), Information technology - Generic coding of moving pictures and associated audio information: Audio. IT-T Recommendation T.411 (1993) I ISO/IEC 8613-1:1994, Information technology - Open Documen

39、t Architecture (ODA) and interchange format: Introduction and general principles. IT-T Recommendation T.412 (1993) I ISO/IEC 8613-2:1995, Information technology - Open Document Architecture (ODA) and interchange format: Document structures. IT-T Recommendation T.414 (1993) I ISO/TEC 8613-4:1994, Inf

40、ormation technology - Open Document Architecture (ODA) and interchange format: Document profile. IT-T Recommendation T.415 (1993) I ISO/IEC 8613-5: 1994, Information technology - Open Document Architecture ( ODA) and interchange format: Open Document Interchange Format. IT-T Recommendation T.416 (19

41、93) I ISO/IEC 8613-6: 1994, Information technology - Open Document Architecture (ODA) and interchange format: Character content architectures. IT-T Recommendation T.417 (1993) I ISO/IEC 8613-7:1994, Information technology - Open Document Architecture (ODA) and interchange format: Raster graphics con

42、tent architectures. IT-T Recommendation T.418 (1993) I ISO/IEC 8613-8:1994, Information technology - Open Document Architecture (ODA) and interchange format: Geometric graphics content architectures. ITU-T Recommendation T.421 (1994) I ISO/IEC 8613-1 1:1995, Information technology - Open Document Ar

43、chitecture (ODA) and interchange format: Tabular structures and tabular layout. ITU-T Recommendation T.422 (1995) I ISO/IEC 8613-12:1996, Information technology - Open Document Architecture (ODAJ and interchange format: Identification of document fragments. ITU-T Recommendation T.4242) I ISO/IEC 861

44、3-14 .2), Information technology - Open Document Architecture (ODA) and interchange format: Temporal relationships and non-linear structures. - - - - - - - - - - 2.2 Paired Recommendations I International Standards equivalent in technical content - CCITT Recommendation X.208 (1988), Specification of

45、 Abstract Syntax Notation One (ASN.1). ISO/IEC 8824: 1990, Information technology - Open System Interconnection - Specification of Abstract Syntax Notation One (ASN.). 2.3 Additional references - IS0 8879:1986, Information processing - Text and ofice system - Standard Generalized Markup Language (SG

46、ML). IS0 266: 19753), Acoustics - Preferredfrequencies for measurements. CCITT Recommendation G.711 (1988), Pulse Code Modulation (PCM) of voicefrequencies. (ADPCM). CCITT Recommendation G.722 (1988), 7 kHz audio-coding within 64 kbius. - - - CCITT Recommendation G.72 1 (1988), 32 kbih Adaptive Diff

47、erential Pulse Code Modulation - Presently at the stage of draft. 2, To be published. 3, Currently under revision. 2 ITU-T Rec. T.419 (1995 E) i ITU-T RECNN*T.419 95 W 4862591 Ob12454 924 ISO/IEC 8613-9 : 1996 (E) - CCIT Recommendation G.723 (1988), Extensions of Recommendation G. 721 adaptive diffe

48、rential pulse code modulation to 24 and 40 kbids for digital circuit multiplication equipment application. - CCITT Recommendation G.726 (1990), 40, 32, 24, 16 kbius Adaptive Differential Pulse Code Modulation (ADPCM). CCITT Recommendation G.727 (1990), 5-, 4-, 3-, and 2-bits/sampEe embedded Adaptive

49、 Differential Pulse Code Modulation (ADPCM). CCITT Recommendation G.728 (1992), Coding of speech at 16 kbids using low-delay code excited linear prediction. CCITT Recommendation 5.41 (1988), Characteristics of equipment for the coding of analogue high quality sound-program signals for transmission on 384 kbids channels. CCIT Recommendation 5.42 (1988), Characteristics of equipment for the coding of analogue medium quality sound-program signals for the transmission on 384 kbius channels. ISOAEC 11 172-3: 1993, Information technology - Coding of moving pictures and associa