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Ts 103 491 V1.1.1 (2017-04) ETSI TS 103 491 V1.1.1 (2017-04) TECHNICAL SPECIFICATION DTS-UHD Audio Format; Delivery of Channels, Objects and Ambisonic Sound Fields 2 ETSI TS 103 491 V1.1.1 (2017-04) Reference DTS/JTC-DTS-UHD Keywords audio, codec, object audio ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. 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ETSI 3 ETSI TS 103 491 V1.1.1 (2017-04) Contents Intellectual Property Rights .............................................................................................................................. 20 Foreword ........................................................................................................................................................... 20 Modal verbs terminology .................................................................................................................................. 20 1 Scope ...................................................................................................................................................... 21 2 References .............................................................................................................................................. 21 2.1 Normative references ....................................................................................................................................... 21 2.2 Informative references ...................................................................................................................................... 21 3 Definitions, abbreviations and document conventions ........................................................................... 22 3.1 Definitions ........................................................................................................................................................ 22 3.2 Abbreviations ................................................................................................................................................... 23 3.3 Document Conventions .................................................................................................................................... 23 4 DTS-UHD System Overview ................................................................................................................. 23 4.1 Overview .......................................................................................................................................................... 23 4.2 Stream Construction ......................................................................................................................................... 24 4.2.1 Construction of a DTS-UHD Audio Frame ................................................................................................ 24 4.2.2 Frame Table of Contents (FTOC) ............................................................................................................... 24 4.2.3 Sync Frames................................................................................................................................................ 25 4.2.4 Non-sync Frames (Predictive Frames) ........................................................................................................ 25 4.3 Carriage of Metadata ........................................................................................................................................ 25 4.3.1 Organization of Metadata ........................................................................................................................... 25 4.3.2 Metadata Chunks ........................................................................................................................................ 26 4.3.3 Fundamental Components of the Metadata Chunk ..................................................................................... 27 4.3.3.1 Metadata Chunk: Data ........................................................................................................................... 27 4.3.3.2 Reserved and Byte Align Fields ............................................................................................................ 27 4.3.3.3 Metadata Chunk CRC Word ................................................................................................................. 27 4.4 Audio Chunks ................................................................................................................................................... 27 4.5 Organization of Streams ................................................................................................................................... 29 4.5.1 Objects, Object Groups, Presentations ........................................................................................................ 29 4.5.2 Properties of Objects ................................................................................................................................... 29 4.5.3 Object Groups ............................................................................................................................................. 29 4.5.4 Audio Presentations .................................................................................................................................... 30 5 DTS-UHD Header Tables and Helper Functions ................................................................................... 33 5.1 Overview .......................................................................................................................................................... 33 5.2 Constants, Tables and Helper Functions .......................................................................................................... 33 5.2.1 Fixed Point Constants ................................................................................................................................. 33 5.2.2 Lookup Tables ............................................................................................................................................ 33 5.2.2.1 Scale Factor Table ................................................................................................................................. 33 5.2.2.2 Long Term Loudness Measure Table .................................................................................................... 33 5.2.2.3 Per-Object Long Term Loudness Measure Table ................................................................................. 33 5.2.2.4 Quantization Table for DRC Fast Attack Smoothing Constant............................................................. 34 5.2.2.5 Quantization Table for DRC Fast Release Smoothing Constant ........................................................... 34 5.2.2.6 Quantization Table for DRC Slow to Fast Threshold ........................................................................... 34 5.2.2.7 Inverse Quantization Table for the Exponential Window Smoothing Parameter Lambda.................... 34 5.2.3 Helper Functions ......................................................................................................................................... 35 5.2.3.1 ExtractVarLenBitFields ........................................................................................................................ 35 5.2.3.2 UpdateCode ........................................................................................................................................... 35 5.2.3.3 CountBitsSet_to_1 ...............................................................................................................................
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