TRANSMISSION RULES FOR THE DVB-T (Terrestrial) NETWORK For New Zealand Free to Air Digital Broadcasting Version 3.0 Date: 22nd September 2014 Freeview Limited © Page 1 of 129 Contents 1 References.......................................................................................................... 7 2 General .............................................................................................................. 9 2.1 Document History...................................................................................... 10 2.2 Abbreviations ............................................................................................. 10 3 General DVB-T Network Structure .................................................................... 13 4 Freeview DTT Network SI – Overall Summary .................................................. 15 4.1 Scope ........................................................................................................ 15 4.2 Network Information Table and associated descriptors ................................ 15 4.3 Event Information Table and associated descriptors ..................................... 15 4.4 Service Description Table and associated descriptors .................................. 16 4.5 TPS bits ...................................................................................................... 16 4.6 Network and Service Acquisition ................................................................ 16 5 PSI/SI ................................................................................................................ 18 5.1 General – DVB-T ....................................................................................... 18 5.2 Huffman Compression ............................................................................... 18 5.2.1 Compressing Strings ............................................................................ 18 5.2.2 Decompressing Strings ........................................................................ 19 5.2.3 Signalling of compressed strings .......................................................... 21 5.2.4 String encoding types .......................................................................... 21 5.2.5 Decompression tables ......................................................................... 21 5.2.6 Character set of decompressed strings.................................................. 22 5.3 Descriptors ................................................................................................ 22 5.3.1 Field Sizes of the Descriptors ............................................................... 24 5.4 Program Association Table (PAT) ................................................................ 24 5.5 Conditional Access Table (CAT) ................................................................. 25 5.6 Program Map Table (PMT) .......................................................................... 26 5.6.1 Mandatory Descriptors ........................................................................ 26 5.6.2 Optional Descriptors ........................................................................... 28 5.6.3 MHEG-5 Data Carousel Descriptors within the PMT ............................ 28 5.7 Network Information Table (NIT) ................................................................ 29 5.7.1 Mandatory Descriptors ........................................................................ 30 5.7.2 Optional Descriptors ........................................................................... 32 5.8 Bouquet Association Table (BAT) ................................................................ 33 5.9 Service Description Table –Actual (SDT-Actual) .......................................... 34 5.9.1 Mandatory Descriptors ........................................................................ 34 5.9.2 Mandatory Descriptors for PVR type devices ....................................... 35 5.10 Service Description Table –Actual (SDT-Other) ....................................... 35 5.10.1 Mandatory Descriptors for PVR type devices ....................................... 36 5.11 Event Information Table (EIT) .................................................................. 37 5.11.1 Mandatory Descriptors – EIT_actual_p/f ............................................... 37 5.11.2 Mandatory Descriptors for PVR type devices (optional for other receiver types) 39 5.11.3 Optional Descriptor ............................................................................ 40 5.12 Event Information Table - Other (EITp/f-other) ......................................... 40 5.12.1 Mandatory Descriptors – EIT_other_p/f ................................................ 41 5.12.2 Mandatory Descriptors for PVR type devices (optional for other receiver types) 41 5.12.3 Optional Descriptor ............................................................................ 42 Freeview Limited © Page 2 of 129 5.13 EIT Scheduleactual and other ........................................................................... 42 5.13.1 Mandatory Descriptors – EIT_Scheduleactual and other ................................ 43 5.13.2 Mandatory Descriptors for PVR type devices ....................................... 43 5.13.1 Optional Descriptor ............................................................................ 44 5.14 Time Date Table (TDT) ........................................................................... 45 5.15 Time Offset Table (TOT) ......................................................................... 45 5.15.1 Mandatory Descriptors ........................................................................ 45 5.16 Application Information Table (AIT) ........................................................ 45 6 Use of Specific SI Descriptors ........................................................................... 46 6.1 Freeview_Logical_channel_descriptor ........................................................ 46 6.1.1 Logical Channel Number Syntax ......................................................... 46 6.1.2 Allocation of LCNs’ ............................................................................. 47 6.1.3 Conflicts due to Coverage Overlaps ..................................................... 47 6.1.4 LCN conflicts due to Parent Transmitters and Translators ..................... 48 6.1.5 Signal Quality Matrix .......................................................................... 48 6.2 FTA Content Management Descriptor ......................................................... 49 6.2.1 Content Management signalling .......................................................... 49 6.2.2 Content Management Measures .......................................................... 51 6.3 Use of Network Change Notify Descriptor .................................................. 53 6.4 Use Of the Message Descriptor .................................................................. 54 6.4.1 Notes For Receiver Manufacturers ....................................................... 55 6.5 Supplementary Audio Descriptor ................................................................ 57 6.5.1 Proposed Broadcaster Signalling .......................................................... 57 6.5.2 Receivers’ Supplementary Audio Settings Menu ................................... 58 7 Use of PVR Recording Signalling ...................................................................... 60 7.1 Overview ................................................................................................... 60 7.1.1 Use of Service Information for PVR devices ......................................... 61 7.1.2 Use of the Content Identifier Descriptor ............................................... 62 7.1.3 CRID Types ........................................................................................ 62 7.1.4 Programme CRID ................................................................................ 62 7.1.5 Series CRID ........................................................................................ 62 7.1.6 Recommendations .............................................................................. 63 7.1.7 Use of the Instance Metadata Identifier to manage split content ........... 63 7.2 CID Carriage .............................................................................................. 64 7.3 CRID Encoding .......................................................................................... 64 7.3.1 Default Authority Descriptor ............................................................... 65 7.4 The Timing of the Booking ......................................................................... 65 7.5 The Booking Process .................................................................................. 66 7.6 The Recording Process ............................................................................... 67 7.6.1 Programmes ........................................................................................ 67 7.7 Series and Recommendations ..................................................................... 68 7.8 PVR Interface Illustration ............................................................................ 69 7.9 Trailer Bookings ......................................................................................... 69 7.9.1 Operation ........................................................................................... 69 7.9.2 Trailer-booking Diagram ....................................................................