ENGINEERING COMMITTEE Data Standards Subcommittee AMERICAN NATIONAL STANDARD ANSI/SCTE 137-6 2017 Modular Headend Architecture Part 6: Edge QAM Video Stream Interface ANSI/SCTE 137-6 2017 NOTICE The Society of Cable Telecommunications Engineers (SCTE) Standards and Operational Practices (hereafter called “documents”) are intended to serve the public interest by providing specifications, test methods and procedures that promote uniformity of product, interchangeability, best practices and ultimately the long term reliability of broadband communications facilities. These documents shall not in any way preclude any member or non-member of SCTE from manufacturing or selling products not conforming to such documents, nor shall the existence of such standards preclude their voluntary use by those other than SCTE members. SCTE assumes no obligations or liability whatsoever to any party who may adopt the documents. 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AMERICAN NATIONAL STANDARD ©SCTE 2 ANSI/SCTE 137-6 2017 Contents 1 SCOPE .................................................................................................................................................................. 1 1.1 INTRODUCTION AND PURPOSE ........................................................................................................................ 1 1.2 REQUIREMENTS AND CONVENTIONS ............................................................................................................... 1 2 REFERENCES .................................................................................................................................................... 2 2.1 NORMATIVE REFERENCES .............................................................................................................................. 2 2.2 INFORMATIVE REFERENCES ............................................................................................................................ 2 2.3 REFERENCE ACQUISITION ............................................................................................................................... 3 3 TERMS AND DEFINITIONS ............................................................................................................................ 4 4 ABBREVIATIONS AND ACRONYMS ............................................................................................................ 5 5 TECHNICAL OVERVIEW ................................................................................................................................ 7 5.1 VIDEO EQAM REFERENCE ARCHITECTURE ................................................................................................... 7 5.1.1 Video EQAM Block Diagram ................................................................................................................ 7 5.1.2 Static vs. Dynamic Sessions ................................................................................................................... 8 5.1.3 Input TS Processing ............................................................................................................................... 9 5.1.4 QAM Channel Processing ................................................................................................................... 10 5.1.5 Redundancy ......................................................................................................................................... 10 5.1.6 Summary of Session Types ................................................................................................................... 10 6 STREAM INPUT SPECIFICATIONS ............................................................................................................ 12 6.1 STREAM INPUT ETHERNET INTERFACE SPECIFICATIONS ............................................................................... 12 6.2 MPEG-2 TRANSPORT STREAM OVER IP INTERFACE SPECIFICATIONS .......................................................... 12 6.2.1 MPEG-2 Input Transport Streams ....................................................................................................... 13 6.2.2 IP Unicast and Multicast ..................................................................................................................... 14 6.2.3 Private Data Streams ........................................................................................................................... 14 6.3 INPUT STREAM NETWORK DE-JITTERING SPECIFICATION.............................................................................. 14 7 STREAM INPUT TO OUTPUT ROUTING ................................................................................................... 16 7.1 STATIC PORT MAP BASED ROUTING ............................................................................................................. 16 7.2 DYNAMIC ERMI-2 SIGNALING BASED ROUTING ............................................................................................ 16 7.3 SIMULTANEOUS HANDLING OF DIFFERENT SESSION TYPES ............................................................................ 17 7.4 MPTS INPUT ROUTING ................................................................................................................................. 18 7.5 INPUT TO OUTPUT LATENCY ......................................................................................................................... 18 8 QAM CHANNEL PROCESSING .................................................................................................................... 19 8.1 MULTIPLEXING MODE .................................................................................................................................. 19 8.1.1 General Multiplexing Requirements .................................................................................................... 19 8.1.2 Multiplexing with Input SPTS Streams ................................................................................................ 23 8.1.3 Multiplexing with Single Program Demux from Input MPTS .............................................................. 23 8.1.4 Multiplexing with Entire "Pre-conditioned" MPTS ............................................................................. 24 8.2 PASSTHROUGH MODE ................................................................................................................................... 24 9 ENCRYPTION AND ENCRYPTION INTERFACE ..................................................................................... 25 9.1 VIDEO PROGRAM ENCRYPTION..................................................................................................................... 25 9.2 VIDEO PROGRAM SCRAMBLING .................................................................................................................... 25 9.3 ENCRYPTION CONDITIONAL ACCESS CONTROL MESSAGES .......................................................................... 25 10 STREAM OUTPUT SPECIFICATION ...................................................................................................... 28 AMERICAN NATIONAL STANDARD ©SCTE 3 ANSI/SCTE 137-6 2017 10.1 OUTPUT MPEG-2 TRANSPORT STREAM GENERAL REQUIREMENTS ............................................................. 28 10.2 OUTPUT MPEG-2 TRANSPORT STREAM OPERATIONAL REQUIREMENTS ...................................................... 28 10.2.1 Output Stream Set up Time .................................................................................................................. 28 11 REDUNDANCY SPECIFICATIONS .......................................................................................................... 29 11.1 REDUNDANCY INTRODUCTION...................................................................................................................... 29 11.1.1 Redundancy: Efficiency ....................................................................................................................... 29 11.1.2 Redundancy: Quality of Service Types ...............................................................................................