[Cellar] Protocol Action: 'Free Lossless Audio Codec' to Proposed Standard (draft-ietf-cellar-flac-14.txt)
The IESG <iesg-secretary@ietf.org> Thu, 29 February 2024 19:08 UTC
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Date: Thu, 29 Feb 2024 11:08:56 -0800
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Subject: [Cellar] Protocol Action: 'Free Lossless Audio Codec' to Proposed Standard (draft-ietf-cellar-flac-14.txt)
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The IESG has approved the following document: - 'Free Lossless Audio Codec' (draft-ietf-cellar-flac-14.txt) as Proposed Standard This document is the product of the Codec Encoding for LossLess Archiving and Realtime transmission Working Group. The IESG contact persons are Murray Kucherawy and Francesca Palombini. A URL of this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-cellar-flac/ Technical Summary This document defines the Free Lossless Audio Codec (FLAC) format and its streamable subset. FLAC is designed to reduce the amount of computer storage space needed to store digital audio signals without losing information in doing so (i.e., lossless). FLAC is free in the sense that its specification is open and its reference implementation is open-source. Compared to other lossless (audio) coding formats, FLAC is a format with low complexity and can be coded to and from with little computing resources. Decoding of FLAC has seen many independent implementations on many different platforms, and both encoding and decoding can be implemented without needing floating- point arithmetic. Working Group Summary The WG is very small (6-8 active participants), but pretty much the entire active part of the WG was involved in the consensus for this document, and the GitHub repo for this specification shows 11 people who have contributed text to the document, and discussion of issues and pull requests usually involves 3-5 participants. More WG members spoke than were silent. Document Quality There are two independent implementations (libFLAC and libavcodec), plus a list of implementations, all described in the document. It's worth noting that one of the challenges for this draft was collecting the long and broad FLAC implementation history, to minimize the amount of incompatibility this spec introduces. To give some idea of this constraint, Windows, Android, MacOS/iOS, and SerinityOS all include FLAC libraries, and FLAC can be implemented on bare hardware, so incompatibility is not taken lightly. An early media type review was solicited and feedback was addressed. Personnel The Document Shepherd for this document is Spencer Dawkins. The Responsible Area Director is Murray Kucherawy.