ITU-T H 248 9-2009 Gateway control protocol Advanced media server packages (Study Group 16)《网关控制协议 高级媒体服务器包 16号研究组》.pdf

1、 International Telecommunication Union ITU-T H.248.9TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (12/2009) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Advanced media server packages Recommendation ITU-T H.24

2、8.9 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H.2

3、59Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia services H.360H.

4、369 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboration applications and servic

5、es H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND AD

6、VANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application event hand

7、ling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.248.9 (12/2009) i Recommendation ITU-T H.248.9 Gateway control protocol:

8、 Advanced media server packages Summary Recommendation ITU-T H.248.9 provides two sets of packages: syntactic and functional. The syntactic packages provide the ability to specify announcements with variable content, with a degree of flexibility constrained only by the provisioning of the MG and MGC

9、. This syntax may in principle be used to specify multimedia announcements, although its application in this Recommendation is to evoke audio content. The functional packages provide advanced control of an Audio Resource Function using the ITU-T H.248.1 protocol. The packages provide the ability to

10、play recorded announcements with variable content, carry out prompted collection of digits, and carry out prompted collection of recorded audio. An additional package provides the ability to manage recorded media segments on the media gateway. Additional functionality incorporated by ITU-T H.248.9 (

11、2005) Amendment 1 (2007): 6.3.6.11 New variable type “Tone“ for dynamic audio segment specification. 6.4 Set extension of basic syntax: introduction of a new selector for text attributes. 6.5.5.1 Variable type “Phrase“: introduction of subtypes. 9.3.1 Signal PlayCollect: enhanced functionality, new

12、parameters. NOTE This Recommendation has been renumbered in 2002. It was formerly known as Rec. ITU-T H.248 Annex M.1. ITU-T H.248.9 (2005) Amendment 1 (2007) defines packages which enable automatic speech recognition (ASR), text to speech (TTS) and multimedia playout functionality between a media g

13、ateway controller (MGC) and a media gateway (MG) controlled by ITU-T H.248.1. In this scenario, the MGC may take the form of a media controller (MC) and the MG may take the form of a media processor (MP). This revision introduces a number of new functions. The new functions include: A playout comple

14、tion event to determine the duration of the played announcement and the offset into the announcement the playout ended. The ability to report the key that terminates a recording as well as the length in time and bytes of the recording. It allows the MGC to specify whether recordings are amended to o

15、r overwrite a storage uniform resource identifier (URI). The ability to specify an offset into the announcement, where to start playing from. The ability to specify an absolute volume for an announcement. The ability to detect and report control digits and whether they are associated with the announ

16、cement or collection phases. The ability for control digits to request the MG to pause, resume, fast forward and rewind an announcement or to increase or decrease the volume of an announcement and to adjust the speed of delivery. The ability to indicate whether the collected digits should be stored

17、in a log file or not. For example: digits related to a pin code would not be stored. The ability to detect “marks“ within text to speech grammar script. History Edition Recommendation Approval Study Group 1.0 ITU-T H.248.9 2002-03-29 16 2.0 ITU-T H.248.9 2005-01-08 16 2.1 ITU-T H.248.9 (2005) Amend.

18、 1 2007-08-29 16 3.0 ITU-T H.248.9 2009-12-14 16 ii Rec. ITU-T H.248.9 (12/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standard

19、ization 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 worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which

20、 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 WTSA Resolution 1. In some areas of information technology which fall within ITU

21、-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation

22、 is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must

23、“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may

24、 involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability 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

25、 Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database

26、at http:/www.itu.int/ITU-T/ipr/. ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.248.9 (12/2009) iii CONTENTS Page 1 Scope 1 2 References. 2 3 Definitions 3 4 Abbreviations and acronyms 3

27、5 Design philosophy 4 6 Announcement specification syntax . 5 6.1 Syntactical concepts: audio segments, multimedia segments, variables and embedded variables . 5 6.2 Basic announcement syntax package . 9 6.3 Voice variable syntax package . 12 6.4 Set extension to basic syntax 17 6.5 General text var

28、iable type extension to basic syntax 19 6.6 Examples 21 7 New ITU-T H.248.1 error codes. 23 7.1 Illegal syntax within an announcement specification . 23 7.2 Variable type not supported 23 7.3 Variable value out of range 24 7.4 Category not supported . 24 7.5 Selector type not supported 24 7.6 Select

29、or value not supported 24 7.7 Unknown segment ID . 24 7.8 Mismatch between play specification and provisioned data 25 7.9 Provisioning error . 25 7.10 Invalid offset . 25 7.11 No free segment ids 25 7.12 Temporary segment not found 26 7.13 Segment in use 26 8 Advanced audio server base package . 26

30、8.1 Properties 26 8.2 Events . 26 8.3 Signals 28 8.4 Statistics 31 8.5 Procedure 31 9 AAS digit collection package . 31 9.1 Properties 32 9.2 Events . 32 9.3 Signals 34 iv Rec. ITU-T H.248.9 (12/2009) Page 9.4 Statistics 47 9.5 Procedures 47 10 AAS recording package 50 10.1 Properties 50 10.2 Events

31、 . 51 10.3 Signals 54 10.4 Statistics 65 10.5 Procedures 65 11 Advanced audio server segment management package 66 11.1 Properties 67 11.2 Events . 67 11.3 Signals 67 11.4 Statistics 69 11.5 Procedures 69 12 Automatic speech recognition package 69 12.1 Properties 69 12.2 Events . 69 12.3 Signals 71

32、12.4 Statistics 78 12.5 Procedures 78 13 Advanced Audio Server base package for TTS enhancement 79 13.1 Properties 79 13.2 Events . 79 13.3 Signals 80 13.4 Statistics 84 13.5 Procedure 84 14 Multimedia play package 84 14.1 Properties 85 14.2 Events . 85 14.3 Signals 85 14.4 Statistics 88 14.5 Error

33、codes 88 14.6 Procedures 88 15 Multimedia recording package . 88 15.1 Properties 88 15.2 Events . 88 15.3 Signals 89 15.4 Statistics 99 15.5 Error codes 99 Rec. ITU-T H.248.9 (12/2009) v Page 15.6 Procedures 99 16 Enhanced DTMF detection package . 99 16.1 Properties 99 16.2 Events . 99 16.3 Signals

34、102 16.4 Statistics 102 16.5 Procedures 102 Bibliography. 104 Rec. ITU-T H.248.9 (12/2009) 1 Recommendation ITU-T H.248.9 Gateway control protocol: Advanced media server packages 1 Scope This Recommendation uses the package mechanism to define a parameter syntax to provide a means of referring to pr

35、ovisioned announcements and variable content to be played within them. As indicated in documentation of the packages concerned, this syntax contains optional features, the support of which is indicated by the presence of the additional packages on the termination. The syntax may be used to evoke mul

36、timedia content. In addition, this Recommendation adds a series of functional packages to the Megaco/ITU-T H.248.1 protocol to control an Audio or Multimedia Resource Function which may reside on a media gateway or specialized audio server. The announcement specification syntax is described in a ser

37、ies of packages: Basic syntax package: Provides the syntax by which to refer to provisioned media segments, with a general capability for extension. See clause 6.1 for an introduction and clause 6.2 for detailed definition. Voice variables package: An optional extension to the base syntax, which pro

38、vides stand-alone and embedded variables, with an initial set of voice variable types. See clause 6.1.5 for an introduction and clause 6.3 for detailed definition. Set syntax package: An optional extension to the base syntax, which provides an arbitrary number of user-defined qualifiers to be used i

39、n resolving complex audio structures. For example, the user could define qualifiers for any or all of the following: language, accent, audio file format, gender, speaker or customer. See clause 6.1.6 for an introduction and clause 6.4 for detailed definition. Generic text syntax package: An optional

40、 extension to the base syntax, which provides a generic text voice variable type. See clause 6.1.7 for an introduction and clause 6.5 for a detailed definition. The functional packages documented in this Recommendation are as follows: Advanced audio server (AAS) base package: Provides a signal to pl

41、ay an announcement and events to monitor the outcome of the playout request. See clause 8. AAS base package for TTS enhancement: Provides signals to play TTS and an event to monitor the outcome of the playout request. See clause 13. AAS Digit collection package: Extends the AAS base package by provi

42、ding a signal and events to coordinate digit collection with the playout of prompting announcements. See clause 9. AAS recording package: Extends the AAS base package by providing a property, signals and events to coordinate the collection of recorded voice with the playout of prompting announcement

43、s. See clause 10. AAS segment management package allows the MGC to specify an alternative audio segment, which is played in place of a given segment whenever that segment is invoked, until the override is terminated by the MGC. It also allows deletion of persistent segments. Unlike the other package

44、s, this package is defined on a special logical segment control termination and uses only the basic announcement specification syntax. See clause 11. AAS automatic speech recognition package: Provides signals to play ASR and events to indicate the result of the play request. See clause 12. AAS Multi

45、media Play Package: Provides a signal to play a multimedia file and events to monitor the outcome of the playout request. See clause 14. 2 Rec. ITU-T H.248.9 (12/2009) AAS Multimedia Recording Package: Extends the AAS Recording Package to coordinate the collection of recorded multimedia. See clause

46、15. Enhanced DTMF Detection Package: This Package allows the MGC to determine whether digits were collected during a prompting or collection phase. See clause 16. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitut

47、e provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recomm

48、endations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T H.248.1 Recommendation ITU-T H.248.1 (200

49、2), Gateway Control Protocol: Version 2, as amended by its Corrigendum 1 (03/2004). ITU-T Q.1218 Recommendation ITU-T Q.1218 (1995), Interface Recommendation for intelligent network CS-1. ITU-T Q.1950 Recommendation ITU-T Q.1950 (2002), Bearer independent call bearer control protocol. IETF RFC 1305 IETF RFC 1305 (1992), Network Time Protocol (Version 3). IETF RFC 1738 IETF RFC 1738 (1994), Uniform Resource Locators (URL). IETF RFC 2396 IETF