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add A_AC4 codec #874

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8 changes: 8 additions & 0 deletions cellar-matroska5/matroska5_body.md
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Expand Up @@ -133,6 +133,14 @@ in the form defined in [@!RFC5646]; see [@!RFC9559, section 12] on language code

This documents adds the following codec mappings, with the same definition format as in [@!I-D.ietf-cellar-codec].

## A_AC4

Codec ID: A_AC4

Codec Name: Digital Audio Compression AC-4

Description: Each Matroska frame corresponds to a "Raw AC-4 frame" as defined in Section 4.2 of [@!ETSI-TS103-190-1].

## A_MPC

Codec ID: A_MPC
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1 change: 1 addition & 0 deletions cellar-matroska5/matroska5_iana.md
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Expand Up @@ -9,5 +9,6 @@ The Change Controller for the these new entries is the IETF.

Codec ID | Track Type | Description | Reference
--------:|:----------:|:-----------------------|:------------------------------
A_AC4 | 2 | Digital Audio Compression AC-4 | This document, (#a-ac4)
A_MPC | 2 | MPC (musepack) SV8 | This document, (#a-mpc)
Table: Additional "Matroska Codec IDs" Registry Values{#codec-id-registry-table}
10 changes: 10 additions & 0 deletions cellar-matroska5/rfc_backmatter_matroska5.md
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Expand Up @@ -2,6 +2,16 @@

{backmatter}

<reference anchor="ETSI-TS103-190-1" target="https://www.etsi.org/deliver/etsi_ts/103100_103199/10319001/01.03.01_60/ts_10319001v010301p.pdf">
<front>
<title>Digital Audio Compression (AC-4) Standard; Part 1: Channel based coding</title>
<author>
<organization>European Telecommunications Standards Institute</organization>
</author>
<date month="February" year="2018" />
</front>
</reference>

<reference anchor="ITU-J.17" target="https://www.itu.int/rec/T-REC-J.17/en">
<front>
<title>Pre-emphasis used on sound-programme circuits</title>
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