1、 ETSI TS 102 114 V1.4.1 (2012-09) DTS Coherent Acoustics; Core and Extensions with Additional Profiles Technical Specification ETSI ETSI TS 102 114 V1.4.1 (2012-09)2Reference RTS/JTC-DTS-R3 Keywords audio, broadcast, codec, DVB ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.
2、: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made a
3、vailable in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept o
4、n a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you fin
5、d errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction
6、 in all media. European Telecommunications Standards Institute 2012. European Broadcasting Union 2012. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefi
7、t of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 114 V1.4.1 (2012-09)3Contents Intellectual Property Rights 8g3Foreword . 8g31 Scope 9g32 References 9g32.1 Normative references . 9g32.2 Inform
8、ative references 10g33 Definitions, abbreviations and document conventions . 10g33.1 Definitions 10g33.2 Abbreviations . 12g33.3 Document Conventions 12g34 Summary 13g34.1 Overview 13g34.2 Organization of the present document 14g35 Core Audio . 14g35.1 Frame structure and decoding procedure 15g35.2
9、Synchronization 16g35.3 Frame header 16g35.3.1 Bit stream header 17g35.3.2 Primary Audio Coding Header . 24g35.4 Unpack Subframes . 28g35.4.1 Primary Audio Coding Side Information 28g35.5 Primary Audio Data Arrays 31g35.6 Unpack Optional Information. 34g35.7 Optional Information 34g35.7.1 Auxiliary
10、Data 34g35.7.2 Rev2 Auxiliary Data Chunk 37g35.7.2.1 Rev2 Auxiliary Data Chunk structure . 38g35.7.2.2 Description of Rev2 Auxiliary Data Chunk fields 38g36 Core Extensions 42g36.1 X96 Extension 42g36.1.1 DTS Core + 96 kHz-Extension Encoder . 43g36.1.2 DTS Core + 96 kHz Extension Decoder . 44g36.1.3
11、 Extension (X96) Bitstream Components 45g36.1.3.1 DTS_BCCORE_X96 Frame Header . 46g36.1.3.2 DTS_EXSUB_STREAM_X96 Frame Header . 47g36.1.3.3 X96 Channel Set Header . 48g36.1.3.4 96 kHz Extension Side Information 52g36.1.3.5 96 kHz Extension Audio Data Arrays . 53g36.1.3.6 Interpolation of the LFE Cha
12、nnel Samples . 56g36.2 XBR - Extended Bit Rate Extension 57g36.2.1 DTS Core Substream Encoder + XBR Extension Encoder. 58g36.2.2 DTS XBR Bit Rate Extension Decoder 58g36.2.3 Extension (XBR) Bitstream Components . 59g36.2.4 XBR Frame Header 59g36.2.5 XBR Channel Set Sub-Header 60g36.2.6 XBR Channel S
13、et Data . 61g36.2.6.1 Subframe Side Information . 62g36.2.6.2 XBR Extension Residual Audio Data Arrays . 63g36.2.7 Assembly of XBR subbands . 64g36.3 Extension to 6.1 Channels (XCh) . 65g36.3.1 Unpack Frame Header 65g36.3.2 Unpack Audio Header 66g36.3.3 Unpack Subframes 68g3ETSI ETSI TS 102 114 V1.4
14、.1 (2012-09)46.3.3.1 Side Information . 68g36.3.3.2 Data Arrays . 71g36.4 Extension to More Than 5.1 Channels (XXCH) 73g36.4.1 XXCH Frame Header . 73g36.4.2 XXCH Channel Set Header 76g36.4.2.1 Unpack Subframes 79g36.4.2.2 Side Information . 80g36.4.2.3 Data Arrays . 81g37 DTS Extension Substream Con
15、struction 84g37.1 Relationship Between Core and Extension Substreams . 84g37.2 Audio Presentations and Audio Assets . 85g37.2.1 Channel Sets . 86g37.3 Synchronization and Navigation of the Substream 87g37.3.1 Synchronization 87g37.3.2 Substream Navigation . 87g37.4 Parsing Core Substream and Extensi
16、on Substream Data 88g37.4.1 Extension Substream Header 89g37.4.2 Audio Asset Descriptor . 94g37.4.2.1 Static Metadata 97g37.4.2.2 Dynamic Metadata 102g37.4.2.3 Decoder Navigation Data 105g38 DTS Lossless Extension (XLL) . 111g38.1 Lossless Frame Structure 111g38.1.1 Header Structure . 112g38.1.1.1 C
17、ommon Header . 112g38.1.2 Channel Set Sub-Header . 113g38.1.3 Navigation Index 113g38.1.4 Frequency Band Structure 113g38.1.5 Segments and Channel Sets 113g38.2 Lossless Stream Syntax 114g38.2.1 Common Header . 114g38.2.2 Channel Set Sub-Header . 116g38.2.3 Navigation Index Table 127g38.2.4 Frequenc
18、y Bands 127g38.3 Lossless Stream Synchronization Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no inves
19、tigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specif
20、ication (TS) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to
21、co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU
22、is a professional association of broadcasting organizations whose work includes the co-ordination of its members activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters i
23、s in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 ETSI ETSI TS 102 114 V1.4.1 (2012-09)91 Scope The present document describes the key components of the DTS Coherent Acoustics technology. This edition has been enhanced to
24、 include additional extensions that can be applied either directly to the core, or carried in an extension substream. The extension substream may also be used without the core substream to create new coding profiles. The original DTS Coherent Acoustics coding system is a modular format designed to p
25、ermit forward looking enhancements without causing the obsolescence of a baseline “core“ decoder. The core decoder supports up to 5.1 channels of audio (5 primary channels with 1 Low Frequency Effects (LFE) channel, at up to a 48 kHz sampling frequency. Through the use of extensions, the core can be
26、 enhanced with: Additional discrete channels. Additional matrixed channels. Higher audio sampling frequencies. The addition of an extension substream provides extensibility to the original coding system by allowing additional channels to supplement the core, resolution enhancement of the core throug
27、h residual coding extensions and frequency enhancements. An additional benefit of the extension substream is to enable new coding profiles that do not use the core, such as a low bitrate coding mode and an efficient lossless coding mode. When the extension substream is used in conjunction with the c
28、ore, it is a superset of the original DTS Coherent Acoustics coding system and allows for a simple legacy compatibility by addressing the core substeam only New coding profiles, such as the use of lossless coding without a core and the low bit rate coding profile can maintain compatibility through t
29、he use of a low complexity transcoder. The main feature enhancements inherent to the extension substream are as follows: More channels and greater flexibility in how they are applied, including replacement channels and dubbing tracks. A rich metadata set to permit the combining of audio elements und
30、er both program and user control. Enhanced metadata specifically for broadcast applications. The ability to carry multiple embedded downmixes. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific referen
31、ces, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While
32、 any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI EN 300 468: “Digital Video Broadcasting (DVB); S
33、pecification for Service Information (SI) in DVB systems“. 2 ETSI TS 101 154: “Digital Video Broadcasting (DVB); Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream“. ETSI ETSI TS 102 114 V1.4.1 (2012-09)102.2 Informative references T
34、he following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ISO/IEC 14496-12: “Information technology - Coding of audio-visual objects - Part 12: ISO Base Media File Format“. NOTE: Available at
35、 International Standards Organization, www.iso.ch; International Electrotechnical Commission, www.iec.ch. i.2 ISO/IEC 13818-1: “Information Technology - Generic coding of moving pictures and associated audio information: Systems“. NOTE: Available at International Standards Organization, www.iso.ch;
36、International Electrotechnical Commission, www.iec.ch. i.3 ISO/IEC 14496-14: “Information technology - Coding of audio-visual objects - Part 14: MP4 file format“. NOTE: Available at International Standards Organization, www.iso.ch; International Electrotechnical Commission, www.iec.ch. i.4 ISO/IEC 1
37、4496-1: “Information technology - Coding of audio-visual objects - Part 1: Systems“. NOTE: Available at International Standards Organization, www.iso.ch; International Electrotechnical Commission, www.iec.ch. i.5 ISO 639-2:1998: “Codes for the representation of names of languages - Part 2: Alpha-3 c
38、ode“. NOTE: Available at International Standards Organization, www.ciso.ch; International Electrotechnical Commission, www.iec.ch. i.6 ISO/IEC 8859-1 (1998): “Information technology - 8-bit single-byte coded graphic character sets - Part 1: Latin alphabet No. 1“. NOTE: Available at International Sta
39、ndards Organization, www.iso.ch; International Electrotechnical Commission, www.iec.ch. i.7 DTS Document #9302J81100: “DTS-HD PBR API Library Description“. NOTE: Available from DTS, Inc., . 3 Definitions, abbreviations and document conventions 3.1 Definitions For the purposes of the present document
40、, the following terms and definitions apply: audio frame: complete logical access unit of an audio stream that corresponds to a defined number of decodable PCM audio samples for a given time segment of the audio presentation audio stream: sequence of synchronized audio frames bit(n): pseudo type whe
41、re the parameter n represents consecutive bits in the stream NOTE: Padding is never assumed where this is used. All stream parameters described using bit() are unsigned and MSB first aligned in the stream. ByteAlign(): pseudo function to pad to the end of the current byte with from 0 to 7 bits boole
42、an: value which resolves to either a logical 1 or 0 ETSI ETSI TS 102 114 V1.4.1 (2012-09)11core substream: audio stream component that adheres to the original DTS Coherent Acoustics definition dependent substream: specific type of extension substream that is associated with a core substream DTS Core
43、 Audio Stream: carries the coding parameters of up to 5.1 channels of the original LPCM audio at up to 24 bits per sample with the sampling frequency of up to 48 kHz DTS Extended Audio Stream: channel or frequency extension appended to the core audio component in the core substream DTS XCH Stream: o
44、ne of DTS extended streams that carries the coding parameters obtained from encoding of up to 1 additional channels of original LPCM audio at up to 24 bits per sample with the sampling frequency of up to 48 kHz DTS X96 Stream: DTS extended audio stream that enables encoding of original LPCM audio at
45、 up to 24 bits per sample with the sampling frequency of up to 96 kHz NOTE: The stream carries the coding parameters used for the representation of all remaining audio components that are present in the original LPCM audio and are not represented in the core audio stream. duration: time represented
46、by one decoded audio frame, may be represented in audio samples per channel at a specific audio sampling frequency or in seconds extension: audio stream component providing a specific enhancement or coding profile extension substream: audio stream component that adheres to the definitions described
47、in clause 7 ExtractBits (n): pseudo-function that extracts next n consecutive bits from the stream False: Boolean logic value = 0 LBR: DTS-HD extension used to implement the low bit rate coding profile Linear Pulse Code Modulated (LPCM): sequence of digital audio samples main audio: default audio pr
48、esentation PES payload: portion of the PES packet following the PES header primary audio channels: audio channels encoded in the DTS core primary audio presentation: synonymous with main audio QMF bank: specific filtering structure that provides the means of translating the time domain signal into t
49、he multiple subband domain signals secondary audio: auxiliary or supplemental program SPDIF: generically referring to S/PDIF or TOSLINK serial audio interfaces substream: sequence of synchronized frames comprising one of the logical components of the audio stream true: Boolean logic value = 1 uimsbf: unsigned integer most significant bit first vector quantization: joint quantization of a block of signal samples or a block of signal parameters X96: extension that contains the spectrum beyond 24 kHz to compliment a specific set o
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