ETSI TS 102 114 V1.5.1 (2018-05)

DTS Coherent Acoustics; Core and Extensions with Additional Profiles

RTS/JTC-DTS-R4

General Information

• Status: Published
• Publication Date: 06-May-2018
• Technical Committee: BROADCAS - EBU/CENELEC/ETSI on Broadcasting
• Current Stage: 12 - Completion
• Due Date: 30-Apr-2018
• Completion Date: 07-May-2018

Standards Content (Sample)

ETSI TS 102 114 V1.5.1 (2018-05)






TECHNICAL SPECIFICATION
DTS Coherent Acoustics;
Core and Extensions
with Additional Profiles

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2 ETSI TS 102 114 V1.5.1 (2018-05)



Reference
RTS/JTC-DTS-R4
Keywords
audio, broadcast, codec, DVB
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3 ETSI TS 102 114 V1.5.1 (2018-05)
Contents
Intellectual Property Rights . 16
Foreword . 16
Modal verbs terminology . 16
1 Scope . 17
2 References . 17
2.1 Normative references . 17
2.2 Informative references . 18
3 Definitions, abbreviations and document conventions . 18
3.1 Definitions . 18
3.2 Abbreviations . 20
3.3 Document Conventions . 20
4 Summary . 21
4.1 Overview . 21
4.2 Organization of the present document . 22
5 Core Audio . 22
5.0 Introduction . 22
5.1 Frame structure and decoding procedure . 23
5.2 Synchronization . 24
5.3 Frame header . 24
5.3.0 General Information about the Frame Header . 24
5.3.1 Bit stream header . 25
5.3.2 Primary Audio Coding Header . 32
5.4 Unpack Subframes . 36
5.4.1 Primary Audio Coding Side Information . 36
5.5 Primary Audio Data Arrays . 39
5.6 Unpack Optional Information. 41
5.7 Optional Information . 42
5.7.0 About Optional Information . 42
5.7.1 Auxiliary Data . 42
5.7.2 Rev2 Auxiliary Data Chunk. 45
5.7.2.0 About the REV2 Aux Data Chunk . 45
5.7.2.1 Rev2 Auxiliary Data Chunk structure . 45
5.7.2.2 Description of Rev2 Auxiliary Data Chunk fields . 46
6 Core Extensions . 49
6.0 About the Core Extensions . 49
6.1 X96 Extension . 50
6.1.0 About the X96 Extension . 50
6.1.1 DTS Core + 96 kHz-Extension Encoder . 51
6.1.2 DTS Core + 96 kHz Extension Decoder . 52
6.1.3 Extension (X96) Bitstream Components . 52
6.1.3.0 About the X96 Bitstream Components . 52
6.1.3.1 DTS_BCCORE_X96 Frame Header . 53
6.1.3.2 DTS_EXSUB_STREAM_X96 Frame Header . 54
6.1.3.3 X96 Channel Set Header . 56
6.1.3.4 96 kHz Extension Side Information . 60
6.1.3.5 96 kHz Extension Audio Data Arrays . 60
6.1.3.6 Interpolation of the LFE Channel Samples . 63
6.2 XBR - Extended Bit Rate Extension . 64
6.2.0 About the XBR Extension . 64
6.2.1 DTS Core Substream Encoder + XBR Extension Encoder. 65
6.2.2 DTS XBR Bit Rate Extension Decoder . 65
6.2.3 Extension (XBR) Bitstream Components . 66
6.2.4 XBR Frame Header . 66
ETSI

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4 ETSI TS 102 114 V1.5.1 (2018-05)
6.2.5 XBR Channel Set Sub-Header . 67
6.2.6 XBR Channel Set Data . 68
6.2.6.0 XBR Channel Set Syntax . 68
6.2.6.1 Subframe Side Information . 69
6.2.6.2 XBR Extension Residual Audio Data Arrays . 69
6.2.7 Assembly of XBR subbands . 70
6.3 Extension to 6.1 Channels (XCh) . 71
6.3.0 About the XCh Extension . 71
6.3.1 Unpack Frame Header . 72
6.3.2 Unpack Audio Header . 72
6.3.3 Unpack Subframes . 74
6.3.3.1 Side Information . 74
6.3.3.2 Data Arrays . 77
6.4 Extension to More Than 5.1 Channels (XXCH) . 79
6.4.0 About the XXCH Extension . 79
6.4.1 XXCH Frame Header . 80
6.4.2 XXCH Channel Set Header . 83
6.4.3 Unpack Subframes . 86
6.4.3.1 Unpack Subframes Syntax . 86
6.4.3.2 Side Information . 87
6.4.3.3 Data Arrays . 89
7 DTS Extension Substream Construction . . 91
7.0 About the DTS Extension Substream . 91
7.1 Relationship Between Core and Extension Substreams . 91
7.2 Audio Presentations and Audio Assets . 92
7.2.0 Overview of Extension Substream Architecture . 92
7.2.1 Channel Sets . 93
7.3 Synchronization and Navigation of the Substream . 94
7.3.1 Synchronization . 94
7.3.2 Substream Navigation . 94
7.4 Parsing Core Substream and Extension Substream Data . 95
7.4.0 General Information on Parsing Substreams . 95
7.4.1 Extension Substream Header . 96
7.4.2 Audio Asset Descriptor . 101
7.4.2.0 General Information About the Audio Asset Descriptor . 101
7.4.2.1 Static Metadata . 104
7.4.2.2 Dynamic Metadata . 109
7.4.2.3 Decoder Navigation Data . 112
8 DTS Lossless Extension (XLL) . 118
8.0 General Information About the XLL Extension . 118
8.1 Lossless Frame Structure . 119
8.1.0 General Information About the Lossless Frame Structure . 119
8.1.1 Header Structure . 119
8.1.1.0 General Information About the Header Structure . 119
8.1.1.1 Common Header . 120
8.1.2 Channel Set Sub-Header . 120
8.1.3 Navigation Index . 120
8.1.4 Frequency Band Structure . 120
8.1.5 Segments and Channel Sets . 121
8.2 Lossless Stream Syntax . 121
8.2.1 Common Header . 121
8.2.2 Channel Set Sub-Header . 124
8.2.3 Navigation Index Table . 134
8.2.4 Frequency Bands . 135
8.3 Lossless Stream Synchronization & Navigation . 135
8.3.0 Overview of XLL Navigation . 135
8.3.1 Navigation Index . 135
8.3.2 Stream Navigation . 137
8.3.3 Error Detection . 137
8.3.4 Error Resilience . 138
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5 ETSI TS 102 114 V1.5.1 (2018-05)
8.4 Lossless Stream Decoding . 138
8.4.0 Overview of Lossless Decoding . 138
8.4.1 Band Data . 139
8.4.1.0 General Information About Band Data . 139
8.4.1.1 Unpacking Frequency Band Data . 140
8.4.1.2 Entropy Codes Unpacking and Decoding . 141
8.4.1.3 Decimator History Unpacking . 143
8.4.1.4 LSB Residual Unpacking . 143
8.4.2 Fixed Coefficient Prediction . 143
8.4.3 Inverse Adaptive Prediction on the Decode Side . 144
8.4.4 Inverse Pairwise Channel Decorrelation . 147
8.5 Lossless Processes . 148
8.5.1 Assembling the MSB and LSB Parts . 148
8.5.2 Channel Sets Post-Processing . 151
8.5.2.0 Overview of Channel Set Post-Processing . 151
8.5.2.1 Performing and Reversing Channel Set Downmixing . 151
8.5.2.2 Parallel Downmix . 152
8.5.2.3 Hierarchical Downmix . 153
9 LBR . 155
9.0 General Information about the LBR Extension . 155
9.1 The LBR Decoder Environment . 155
9.1.0 General Information About the LBR Decoder . 155
9.1.1 Persistent Constants and Variables . 155
9.2 LBR Extension Substream Header . 156
9.3 LBR Audio Data Organization . 159
9.3.0 General Information About LBR Structure . 159
9.3.1 Chunks . 159
9.3.1.0 General Information About LBR Chunks . 159
9.3.1.1 Chunk ID . 160
9.3.1.2 Extended ID Chunks . 160
9.3.1.3 Chunk Length . 160
9.3.1.4 Data . 161
9.3.1.5 Checksum Verification and Descrambling . 161
9.4 LBR Frame Chunk . 162
9.5 LBR Decoding . 162
9.5.0 Overview of LBR Decoding . 162
9.5.1 Tonal Decoding . 164
9.5.1.1 Overview of Tonal Decoding . 164
9.5.1.2 Tonal Scale Factors Chunk . 165
9.5.1.2.0 Tonal Scale Factor Chunk Syntax . 165
9.5.1.2.1 Tonal scale factor processing . 165
9.5.1.3 Tonal Chunks . 165
9.5.1.3.0 About Tonal Chunks . 165
9.5.1.3.1 Tonal components processing . 168
9.5.1.3.2 Base-functions synthesis. 169
9.5.2 Residual Decoding . 170
9.5.2.0 About Residual Decoding . 170
9.5.2.1 Residual Decoding Overview. 170
9.5.2.2 Unpacking and Decoding Residuals . 171
9.5.2.2.0 Decoding Residuals Syntax . 171
9.5.2.2.1 Quantization Profiles . 181
9.5.2.2.2 Scale Factor Processing . 182
9.5.2.2.3 Decoding of Grid 1 scale factors . 183
9.5.2.2.4 Decoding of Grid 2 scale factors . 183
9.5.2.2.5 Decoding of Grid 3 scale factors . 183
9.5.2.3 Reconstruction of Hi resolution scale factors grid . 183
9.5.2.4 LPC synthesis . 183
9.5.2.5 Timesamples Processing . 184
9.5.3 Inverse Filterbank . 184
9.5.4 LFE Chunk. 185
9.5.4.0 LFE Chunk Syntax . 185
ETSI

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6 ETSI TS 102 114 V1.5.1 (2018-05)
9.5.4.1 LFE decoding . 187
9.5.5 Embedded Channel Sets Chunk .
...