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40 lines
965 B
Markdown
40 lines
965 B
Markdown
---
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description: Dolby Digital (AC-3) 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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# AC-3 codec registration
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## Description
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The Dolby Digital (AC-3) audio codec, specified in [ETSI TS 102 366](https://www.etsi.org/deliver/etsi_ts/102300_102399/102366/01.04.01_60/ts_102366v010401p.pdf).
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## Codec ID
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```ts
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'ac3'
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```
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## `EncodedPacket` data
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The packet's data must be a sync frame (syntactic element `syncframe()`) as defined in Section 4.3 of [ETSI TS 102 366](https://www.etsi.org/deliver/etsi_ts/102300_102399/102366/01.04.01_60/ts_102366v010401p.pdf), beginning with the sync word `0x0B77`.
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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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```ts
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'ac-3'
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```
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## `AudioDecoderConfig` description
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`description` is not used for this codec.
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