ANSI SCTE 194-1-2018 pdf free download – DTS-HD AUDIO SYSTEM – Part 1: Coding Constraints for Cable Television.
This document describes the coding constraints of the DTS-HD audio system and identifies the normative references that apply. The carriage of the streams described in this specification is defined in SCTE 194-2 [3].
2. Normative References
The following documents contain provisions, which, through reference in this text, constitute provisions of this document. At the time of Subcommittee approval, the editions indicated were valid. All documents are subject to revision; and while parties to any agreement based on this document are encouraged to investigate the possibility of applying the most recent editions of the documents listed below, they are reminded that newer editions of those documents might not be compatible with the referenced version.
2.1. SCTE References
• No normative references are applicable.
2.2. Standards from Other Organizations
[1] ETSI TS 102 114 v1.5.1, “DTS Coherent Acoustics; Core and Extensions with Additional Profiles”
[2] ITU-R Recommendation BS.1770-4, “Algorithms to measure audio programme loudness and true-peak audio level”
2.3. Published Materials
• No normative references are applicable.
3. Informative References
The following documents might provide valuable information to the reader but are not required when complying with this document.
3.1. SCTE References
[3] SCTE 194-2 2018, “DTS-HD Audio System – Part 2 : Constraints for Carriage over MPEG-2 Transport”
3.2. Standards from Other Organizations
[4] ATSC A/85:2018, “ATSC Recommended Practice: Techniques for Establishing and Maintaining Audio Loudness for Digital Television”
3.3. Published Materials
• No informative references are applicable.
6. DTS-HD Coding Constraints
The DTS-HD bitstream shall be compliant with that defined in TS 102 114 [1]. Additional information and constraints for DTS HD bitstreams are defined in the following sub-clauses.
6.1. Stream Architecture
6.1.1. Overview
The DTS-HD bitstream may be composed of a core substream, or an extension substream, or both a core and extension substream. The core substream consist of a sequence of synchronized core frames, where each core frame consists of a header, coded data for up to 5.1 channels of audio and up to one extension. A core substream contains a single asset. The extension substream also consists of a series of synchronized extension frames. If both a core and extension substream exist, the core and extension frames are interleaved in presentation order. An extension frame consists of an extension header, and coded data for up to eight assets. Only the first asset may be dependent on the core substream.
6.1.2. Core Substream The core substream is specified in Chapter 5 of TS 102 114 [1]. Each core substream contains one audio asset consisting of one core coding block and up to one additional coding extension block, as shown in Table 1. For more information on the construction of the core substream, see Chapter 5.3 in [1].
6.1.3. Extension substream The extension substream header is described in Chapter 7 of TS 102 114 [1]. The extension components XCH, XXCH, X96, and XBR are described in Chapter 6 of [1]. The XLL extension is described in chapter 8 of [1] and LBR is described in Chapter 9 of [1]. An extension substream may contain up to 8 audio assets. A description of audio presentations and audio assets is described in Chapter 7.2 of TS 102 114 [1]. Only the first asset of the first extension substream, (asset 0 of substream 0), may be dependent on the core substream. In this case, only the first asset in the extension substream is associated with the core. The permitted combinations of audio extensions are shown in Table 2.ANSI SCTE 194-1 pdf download.