Ts 103 190 V1.1.1 (2014-04)
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ETSI TS 103 190 V1.1.1 (2014-04) Technical Specification Digital Audio Compression (AC-4) Standard 2 ETSI TS 103 190 V1.1.1 (2014-04) Reference DTS/JTC-025 Keywords audio, broadcasting, codec, content, digital, distribution 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 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 103 190 V1.1.1 (2014-04) Contents Intellectual Property Rights .............................................................................................................................. 16 Foreword ........................................................................................................................................................... 16 Introduction ...................................................................................................................................................... 16 1 Scope ...................................................................................................................................................... 18 2 References .............................................................................................................................................. 18 2.1 Normative references ....................................................................................................................................... 18 2.2 Informative references ...................................................................................................................................... 18 3 Definitions, symbols, abbreviations and conventions ............................................................................ 19 3.1 Definitions ........................................................................................................................................................ 19 3.2 Symbols ............................................................................................................................................................ 21 3.3 Abbreviations ................................................................................................................................................... 21 3.4 Conventions ...................................................................................................................................................... 22 4 Bitstream syntax ..................................................................................................................................... 23 4.1 Semantics of syntax specification..................................................................................................................... 23 4.2 Syntax specification ......................................................................................................................................... 23 4.2.1 raw_ac4_frame - Raw AC-4 frame ............................................................................................................. 23 4.2.2 variable_bits - Variable bits ........................................................................................................................ 23 4.2.3 AC-4 frame info .......................................................................................................................................... 24 4.2.3.1 ac4_toc - AC-4 table of contents ........................................................................................................... 24 4.2.3.2 ac4_presentation_info - AC-4 presentation information ....................................................................... 25 4.2.3.3 presentation_version - Presentation version information ...................................................................... 26 4.2.3.4 frame_rate_multiply_info - Frame rate multiplier information ............................................................. 26 4.2.3.5 umd_info - Universal metadata information ......................................................................................... 27 4.2.3.6 ac4_substream_info - AC-4 substream information .............................................................................. 27 4.2.3.7 content_type - Content type .................................................................................................................. 28 4.2.3.8 presentation_config_ext_info - Presentation configuration extended information ............................... 28 4.2.3.9 ac4_hsf_ext_substream_info - AC-4 HSF extension substream information ....................................... 28 4.2.3.10 umd_payloads_substream_info - Universal metadata payloads substream information ....................... 28 4.2.3.11 substream_index_table - Substream index table ................................................................................... 29 4.2.4 AC-4 substreams ......................................................................................................................................... 29 4.2.4.1 ac4_substream - AC-4 substream .......................................................................................................... 29 4.2.4.2 ac4_hsf_ext_substream - AC-4 high sampling frequency extension substream ................................... 30 4.2.4.3 umd_payloads_substream - Universal metadata payloads substream ................................................... 31 4.2.5 audio_data - Audio data .............................................................................................................................. 31 4.2.6 Channel elements ........................................................................................................................................ 32 4.2.6.1 single_channel_element - Single channel element ................................................................................ 32 4.2.6.2 mono_data - Mono data ........................................................................................................................ 32 4.2.6.3 channel_pair_element - Channel pair element ...................................................................................... 33 4.2.6.4 stereo_data - Stereo data ....................................................................................................................... 34 4.2.6.5 3_0_channel_element - 3.0 channel element......................................................................................... 34 4.2.6.6 5_X_channel_element - 5.X channel element ....................................................................................... 35 4.2.6.7 two_channel_data - Two channel data .................................................................................................. 36 4.2.6.8 three_channel_data - Three channel data .............................................................................................. 36 4.2.6.9 four_channel_data - Four channel data ................................................................................................. 36 4.2.6.10 five_channel_data - Five channel data .................................................................................................. 37 4.2.6.11 three_channel_info - Three channel info............................................................................................... 37 4.2.6.12 four_channel_info - Four channel info .................................................................................................. 37 4.2.6.13 five_channel_info - Five channel info................................................................................................... 37 4.2.6.14 7_X_channel_element - 7.X channel element ......................................................................................