1、 ATIS-0800040 IPTV MPEG TRANSPORT STREAM MONITORING ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry. More than 250 companies actively for
2、mulate standards in ATIS 18 Committees, covering issues including: IPTV, Service Oriented Networks, Energy Efficiency, IP-Based and Wireless Technologies, Quality of Service, and Billing and Operational Support. In addition, numerous Incubators, Focus and Exploratory Groups address emerging industry
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8、NT IS AT THE RISK OF THE USER. NOTE - The users attention is called to the possibility that compliance with this standard may require use of an invention covered by patent rights. By publication of this standard, no position is taken with respect to whether use of an invention covered by patent righ
9、ts will be required, and if any such use is required no position is taken regarding the validity of this claim or any patent rights in connection therewith. ATIS-0800040, IPTV MPEG Transport Stream Monitoring Is an ATIS Standard developed by the Quality of Service Metrics (QoSM) Committee under the
10、ATIS IPTV Interoperability Forum (IIF). Published by Alliance for Telecommunications Industry Solutions 1200 G Street, NW, Suite 500 Washington, DC 20005 Copyright 2010 by Alliance for Telecommunications Industry Solutions All rights reserved. No part of this publication may be reproduced in any for
11、m, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. For information contact ATIS at 202.628.6380. ATIS is online at . Printed in the United States of America. ATIS-0800040 ATIS Standard on IPTV MPEG TRANSPORT STREAM MONITORING Alliance for Teleco
12、mmunications Industry Solutions Approved May 18, 2010 Abstract This recommended practice provides a common methodology for describing Transport Stream conformance criteria. It explicitly describes the elements and parameters that should be verified in an ATIS IIF-compliant Transport Stream for it to
13、 be considered a proper emission. This document incorporates by reference all of SCTE-142, except where explicitly extended or constrained. ATIS-0800040 ii FOREWORD The Alliance for Telecommunication Industry Solutions (ATIS) serves the public through improved understanding between carriers, custome
14、rs, and manufacturers. The IPTV Interoperability Forum (IIF) develops requirements, standards, and specifications that will determine the industrys end-to-end solution for Internet Protocol Television (IPTV). The mandatory requirements are designated by the word shall and recommendations by the word
15、 should. Where both a mandatory requirement and a recommendation are specified for the same criterion, the recommendation represents a goal currently identifiable as having distinct compatibility or performance advantages. The word may denotes a optional capability that could augment the standard. T
16、he standard is fully functional without the incorporation of this optional capability. Suggestions for improvement of this document are welcome. They should be sent to the Alliance for Telecommunications Industry Solutions, IIF Staff, 1200 G Street NW, Suite 500, Washington, DC 20005. The Quality of
17、 Service Metrics (QoSM) Committee was responsible for the development of this document, with the leadership of the following people: S. Wright, IIF Chair (AT&T) D. OCallaghan, IIF Vice Chair (Verizon) R. Streijl, QoSM Committee Co-Chair (AT&T) K. Kerpez, QoSM Committee Co-Chair (Telcordia) R. Cherno
18、ck, IIF Technical Editor (Triveni Digital, an LG Company) C.A. Underkoffler, ATIS Chief Editor A. Blasgen, IIF Committee Administrator CONTRIBUTORS Al Morton, AT&T Robert Streijl, AT&T John Williams, JDSU Richard Chernock, Triveni Digital, an LG company Kishan Shenoi, Symmetricom Stefan Winkler, Sym
19、metricom Ken Kerpez, Telcordia Technologies John Colombo, Verizon ATIS-0800040 iii TABLE OF CONTENTS 1 SCOPE & PURPOSE1 1.1 SCOPE 1 1.2 PURPOSE .2 2 REFERENCES 2 3 ACRONYMS & ABBREVIATIONS.3 4 SCTE-142 .3 5 PSI ERRORS .3 5.1 PROGRAM ASSOCIATION TABLE3 8 CONSISTENCY ERRORS.4 9 GENERAL ERRORS4 TABLE O
20、F TABLES TABLE 7.1: ADDITIONAL PAT ERROR CONDITION.4 TABLE 12.1: ADDITIONAL CONSISTENCY ERROR.4 TABLE 13.1: MODIFIED GENERAL ERROR 4 ATIS TANDARD ATIS-08040 ATIS Standard on IPTV MPEG Transport Stream Monitoring 1 1 SCOPE & PURPOSE This ATIS Standard defines the contents and characteristics of the e
21、mission Transport Stream. There may be a large number of interactions and interrelationships amongst various components. Successful tuning and display of programs can be enabled if this Transport Stream adheres to the appropriate standards. This standard uses terms and acronyms defined in ISO/IEC 13
22、818-1 1, ATIS-0800013 2, SCTE-54 3 ATSC A/53 Part 3 4, and ATSC A/65 5, and assumes a fair degree of familiarity with MPEG-2 systems as implemented per the ATIS IIF standards. Readers that do not recognize the terms should refer to A/54A 6, A/69 7, SCTE-142 8, and ATIS-0800013. This standard identif
23、ies transport stream issues by type, dividing errors into the following categories: Program Specific Information (PSI) tables (Program Association Table and Program Map Table). Program and System Information Protocol (PSIP) tables (Mast Guide Table, Virtual Channel Table, etc.). Timing model and buf
24、fering. Consistency. General errors. Each error type is also provided with an error severity, as listed below: Transport Stream Off Air (TOA). Program Off Air (POA). Component Missing (CM). Quality Of Service (QOS). Technically Non-Conformant (TNC). NOTE The error characterizations in SCTE-142 remai
25、n unchanged for an ATIS-compliant transport stream. However, since ATIS-0800013 2 constrains each transport stream to be a Single Program Transport Stream (i.e., carry only one MPEG-2 program), only TOA applies, and POA does not apply to this ATIS standard. 1.1 Scope This recommended practice provid
26、es a common methodology for describing Transport Stream conformance criteria. This document explicitly describes the elements and parameters that should be verified in an ATIS IIF-compliant Transport Stream for it to be considered a proper emission. It does not cover captioning or elementary streams
27、. While the relevant standards define strict limits for each parameter, in practice, the severity of the error may depend upon the magnitude of the deviation. This document recommends severity levels associated with the ranges of deviation from the standard in these parameters. ATIS-0800040 2 This s
28、tandard is based upon an SCTE standard, SCTE-142, which in turn was based on ATSC Recommended Practice A/78A 9. This standard normatively references SCTE-142, incorporating by reference all of SCTE-142, except where explicitly extended or constrained below. 1.2 Purpose The purpose of this standard i
29、s to provide a standardized methodology for characterizing transport errors in an ATIS IIF-compliant Transport Stream, distinguishing between error types and providing bounds for classifying error severities. 2 REFERENCES The following standards contain provisions which, through reference in this te
30、xt, constitute provisions of this ATIS standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this ATIS standard are encouraged to investigate the possibility of applying the most recent editions of the stand
31、ards indicated below. 1 ISO/IEC 13818-1: 2007 + Amendment #3, Information technology Generic coding of moving pictures and associated audio information: Systems, 2007.12 ATIS-0800013, Media Formats and Protocols for IPTV Services, January 2009.23 ANSI/SCTE-54, Digital Video Service Multiplex and Tra
32、nsport System Standard for Cable Television, 2004.34 ATSC A/53 Part 3, ATSC Digital Television Standard, Part 3 Service Multiplex and Transport Subsystem Characteristics, January 2007.45 ATSC A/65, Program and System Information Protocol for Terrestrial Broadcast and Cable, August 2009.46 ATSC A/54A
33、, Guide to the Use of the ATSC Digital Television Standard, with Corrigendum No. 1, December 2003.47 ATSC A/69, Program and System Information Protocol Implementation Guidelines for Broadcasters, December 2009.48 SCTE-142, Recommended Practice for Transport Stream Verification, 2009.39 ATSC A/78A, T
34、ransport Stream Verification, May 2007.41This document is available from the International Organization for Standardization. 2This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005. 3This document is availabl
35、e at the Society for Cable Telecommunications Engineers at . 4This document is available from the Advanced Television Systems Committee. ATIS-0800040 3 3 ACRONYMS & ABBREVIATIONS ATIS Alliance for Telecommunications Industry Solutions ATSC Advanced Television Systems Committee CM Component Missing D
36、TV Digital TV HE-AAC High Efficiency Advanced Audio Coding IIF IPTV Interoperability ForumMGT Master Guide Table MPEG Moving Pictures Experts Group MPTS Multi-Program Transport Stream PAT Program Association Table PMT Program Map Table POA Program Off Air PSI Program Specific Information PSIP Progra
37、m and System Information Protocol QOS Quality of Service SCTE Society of Cable Telecommunications Engineers SPTS Single Program Transport Stream TNC Technically Non-Conformant TOA Transport Stream Off Air VCT Virtual Channel Table 4 SCTE-142 This standard normatively references SCTE-142 8, incorpora
38、ting by reference all of SCTE-142, except where explicitly extended or constrained below. NOTE The error characterizations in SCTE-142 remain unchanged for an ATIS IIF-compliant transport stream. However, since ATIS-0800013 2 constrains each transport stream to be an SPTS (i.e., carry only one MPEG-
39、2 Program), only TOA applies, and POA does not apply to this ATIS standard. 5 PSI ERRORS An IPTV transport stream should be MPEG-2 1 and SCTE-54 6 conformant (see ATIS-0800013 2). 5.1 Program Association Table ATIS IIF-compliant Transport Streams are constrained to be SPTS. The following error condi
40、tion must be considered in addition to the information provided in Table 7.1 of SCTE-142. ATIS-0800040 4 Table 7.1: Additional PAT Error Condition Error Condition Error Qualifier TOA CM QOS TNC PAT SPTS error More than one program signaled in PAT4X X X X Notes: 4) Per ATIS-0800013, each MPEG-2 Trans
41、port Stream is constrained to carry only one program i.e., each is an SPTS. 8 CONSISTENCY ERRORS ATIS IIF-compliant Transport Streams use the ISO 639 descriptor to signal audio language, whereas ATSC & SCTE utilize fields in the AC-3 descriptor for this purpose. For this condition, the following err
42、or condition must be considered in addition to the information in Table 12.1 of SCTE-142. Table 12.1: Additional Consistency Error Error Condition Error Qualifier TOA CM QOS TNC Audio Language Signaling Language field present in AC-3 descriptor, but ISO 639 language descriptor not present8X X X Note
43、s: 8) ATIS-0800013 requires the use of ISO 639 descriptor (defined in 1) to signal audio language, instead of the language field of the AC-3 descriptor. 9 GENERAL ERRORS ATIS IIF-compliant transport requires the presence of different descriptors from SCTE or ATSC. The following table shows the modif
44、ications necessary to the “Missing Descriptors” Error Condition row of Table 13.1 in SCTE-142. Table 13.1: Modified General Error Error Condition Error Qualifier TOA CM QOS TNC Missing Descriptors One or more required descriptors were not found in the stream4X X X Notes: 4) The following descriptors are required to be present in the stream, when the necessary conditions apply: AC-3 Audio Descriptor (when AC-3 audio is present), Program Smoothing Descriptor, ISO-639 Language Descriptor and AAC_descriptor (when HE-AAC or HE-AACv2 audio is present).
