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45 lines
1.5 KiB
Markdown
45 lines
1.5 KiB
Markdown
---
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description: DTS audio codec definition, defining legal codec strings, decoder configs, and packet data formats.
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---
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<script setup>
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import { VPBadge } from 'vitepress/theme'
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</script>
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<VPBadge type="info" text="Audio codec" />
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# DTS codec registration
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## Description
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The DTS audio codec (DTS Coherent Acoustics), specified in [ETSI TS 102 114](https://www.etsi.org/deliver/etsi_ts/102100_102199/102114/01.06.01_60/ts_102114v010601p.pdf).
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## Codec ID
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```ts
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'dts'
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```
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## `EncodedPacket` data
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The packet's data must be a core substream frame as defined in Section 5 of [ETSI TS 102 114](https://www.etsi.org/deliver/etsi_ts/102100_102199/102114/01.06.01_60/ts_102114v010601p.pdf), beginning with the sync word `0x7FFE8001`, followed by any number of extension substreams as defined in Section 7.4.1 of [ETSI TS 102 114](https://www.etsi.org/deliver/etsi_ts/102100_102199/102114/01.06.01_60/ts_102114v010601p.pdf), each beginning with the sync word `0x64582025`. The core substream frame may be omitted.
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The bitstream must use 16-bit big-endian packing.
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## `EncodedPacket` type
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The packet's type is always `'key'`.
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## `AudioDecoderConfig` codec string
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The codec string must be one of the four four-character codes identifying which substreams the bitstream is built from:
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- `'dtsc'` - a core substream only
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- `'dtsh'` - a core substream with extension substreams
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- `'dtsl'` - extension substreams carrying lossless audio, with no core substream
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- `'dtse'` - DTS Express
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## `AudioDecoderConfig` description
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`description` is not used for this codec.
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