ANSI SCTE 194-1-2018 pdf free download.DTS-HD AUDIO SYSTEM – Part 1: Coding Constraints for Cable Television
1. Scope
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
4. Compliance Notation
shall This word or the adjective “required” means that the item is an absolute requirement of this document. shall not This phrase means that the item is an absolute prohibition of this document. forbidden This word means the value specified shall never be used. should This word or the adjective “recommended” means that there may exist valid reasons in particular circumstances to ignore this item, but the full implications should be understood and the case carefully weighted before choosing a different course. should not This phrase means that there may exist valid reasons in particular circumstances when the listed behavior is acceptable or even useful, but the full implications should be understood and the case carefully weighed before implementing any behavior described with this label. may This word or the adjective “optional” means that this item is truly optional. One vendor may choose to include the item because a particular marketplace requires it or because it enhances the product, for example; another vendor may omit the same item. deprecated Use is permissible for legacy purposes only. Deprecated features may be removed from future versions of this document. Implementations should avoid use of deprecated features.
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].
