85 NorDig Unified ver 2.5.1 NorDig Unified Requirements for Integrated Receiver Decoders for use in cable, satellite, terrestrial and IP-based networks Date: 25 August 2014 6 2 NorDig Unified ver 2.5.1 1 Introduction ................................................................................................................................... 5 1.1 Scope .......................................................................................................................................... 5 1.2 Document History ...................................................................................................................... 7 1.3 Terminology ............................................................................................................................. 10 1.4 Definitions ................................................................................................................................ 10 1.5 References ................................................................................................................................ 10 1.6 List of Abbreviations ................................................................................................................ 15 2 General Features of the NorDig IRD .......................................................................................... 19 2.1 Introduction .............................................................................................................................. 19 2.2 IRD Hardware and Firmware ................................................................................................... 19 2.3 System Software and API ......................................................................................................... 23 2.4 General Product Requirement .................................................................................................. 24 PART A: Hardware and Firmware ....................................................................................................... 26 3 The Frontend of the NorDig IRD ................................................................................................ 27 3.1 Common Features..................................................................................................................... 27 3.2 Satellite Tuner and Demodulator.............................................................................................. 27 3.3 Cable Tuner and Demodulator ................................................................................................. 31 3.4 Terrestrial Tuner and Demodulator .......................................................................................... 36 3.5 IP Based Front-End .................................................................................................................. 57 4 MPEG-2 Demultiplexer .............................................................................................................. 59 4.1 General ..................................................................................................................................... 59 4.2 DVB Descrambler Performance (for IRD with embedded descrambling) ............................... 59 4.3 System Clock Recovery ........................................................................................................... 59 5 Video ........................................................................................................................................... 60 5.1 General requirements ............................................................................................................... 60 5.2 Supported resolutions and frame rates ..................................................................................... 60 5.3 Up-sampling/Up-converting ..................................................................................................... 61 5.4 Colorimetry .............................................................................................................................. 61 5.5 Dynamic changes in the video stream ...................................................................................... 62 5.6 AVC still picture ...................................................................................................................... 62 5.7 Minimum video bandwidth ...................................................................................................... 63 5.8 Frame Cropping ........................................................................................................................ 63 5.9 Overscan ................................................................................................................................... 63 5.10 High Definition Video Output and Display .............................................................................. 64 5.11 Down-conversion of High Definition Video for Standard Definition output ........................... 64 5.12 Display Format for other Aspect Ratios ................................................................................... 64 5.13 Rescaling for HbbTV application ............................................................................................. 65 6 Audio ........................................................................................................................................... 66 6.1 General ..................................................................................................................................... 66 6.2 Audio Decoding ....................................................................................................................... 67 6.3 Multichannel Audio .................................................................................................................. 70 6.4 Stereo Audio ............................................................................................................................. 70 6.5 Audio Prioritising ..................................................................................................................... 70 6.6 Audio Output Formats .............................................................................................................. 73 6.7 Audio Video Synchronisation .................................................................................................. 75 6.8 Audio Output Signals ............................................................................................................... 76 6.9 Dynamic Changes..................................................................................................................... 77 6.10 Clean Audio .............................................................................................................................. 77 6.11 Supplementary Audio ............................................................................................................... 78 6.12 IRD Internal Reference Level .................................................................................................. 80 6.13 Loudness Levels, – Dynamic Range Control and Downmixing .............................................. 81 7 Teletext and Subtitling ................................................................................................................ 84 7.1 General ..................................................................................................................................... 84 7.2 EBU Teletext ............................................................................................................................ 85 6 3 NorDig Unified ver 2.5.1 7.3 DVB Subtitling ......................................................................................................................... 85 8 Interfaces and Signal Levels........................................................................................................ 87 8.1 Introduction .............................................................................................................................. 87 8.2 RF- bypass (option) .................................................................................................................. 87 8.3 Two-way Interface ................................................................................................................... 87 8.4 SCART Interfaces (Option) ...................................................................................................... 87 8.5 Audio Output Interfaces (Option) ............................................................................................ 88 8.6 HDMI Interface ........................................................................................................................ 88 8.7 Remote Control Interface ......................................................................................................... 91 9 Interfaces for Conditional Access ............................................................................................... 94 9.1 General ..................................................................................................................................... 94 9.2 Use of the Common Interface................................................................................................... 94 9.3 Use of Smart Card Reader ........................................................................................................ 95 10 The System Software Update .....................................................................................................