IETF Logo Mail Archive

Re: [codec] Ambisonics in an Ogg Opus Container

Marc Lavallee <marc@hacklava.net> Tue, 31 May 2016 18:56 UTC

Return-Path: <marc@hacklava.net>
X-Original-To: codec@ietfa.amsl.com
Delivered-To: codec@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7745B12D151 for <codec@ietfa.amsl.com>; Tue, 31 May 2016 11:56:31 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.621
X-Spam-Level:
X-Spam-Status: No, score=-2.621 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id z5QJjt6eof10 for <codec@ietfa.amsl.com>; Tue, 31 May 2016 11:56:29 -0700 (PDT)
Received: from ironport2-out.teksavvy.com (ironport2-out.teksavvy.com [206.248.154.181]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9CF0612D14B for <codec@ietf.org>; Tue, 31 May 2016 11:56:27 -0700 (PDT)
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: A0BtBgA731xV/zmCCkxcgxCBMsNlh1ECgTw6EwEBAQEBAQGBCoQjAQEDATocIwULCw4TJQ8qHgYTiCQIzyMBAQEBAQUCAR+LOoUFB4QtAQSZbYQClVCBRSOEFFOCRwEBAQ
X-IPAS-Result: A0BtBgA731xV/zmCCkxcgxCBMsNlh1ECgTw6EwEBAQEBAQGBCoQjAQEDATocIwULCw4TJQ8qHgYTiCQIzyMBAQEBAQUCAR+LOoUFB4QtAQSZbYQClVCBRSOEFFOCRwEBAQ
X-IronPort-AV: E=Sophos;i="5.13,465,1427774400"; d="scan'208";a="240070950"
Received: from 76-10-130-57.dsl.teksavvy.com (HELO mail.hacklava.net) ([76.10.130.57]) by ironport2-out.teksavvy.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 31 May 2016 14:56:26 -0400
Received: from localhost (modemcable038.171-70-69.static.videotron.ca [69.70.171.38]) (Authenticated sender: marc@hacklava.net) by mail.hacklava.net (Postfix) with ESMTPSA id 8DBF96B2B; Tue, 31 May 2016 14:54:55 -0400 (EDT)
Date: Tue, 31 May 2016 14:54:55 -0400
From: Marc Lavallee <marc@hacklava.net>
To: Michael Graczyk <mgraczyk@google.com>
Message-ID: <20160531145455.000005a4@hacklava.net>
In-Reply-To: <CABcu6-g3PiaofwuUwUgbXeXC1NyfZ-GBy9cqCdz47UZc_Pr-Fg@mail.gmail.com>
References: <CABcu6-jN2gC0FRm5Vu6CmT5=yMdJr1WSaJJ_-FOXffw8bWjc_g@mail.gmail.com> <574887A3.30003@xiph.org> <CAMdZqKEer5GxSuOdHwY49=Pe_xy_7OnE-RR3Wgc2+C7=g3La1Q@mail.gmail.com> <20160529104233.1bfbda09@telecino> <CABcu6-g3PiaofwuUwUgbXeXC1NyfZ-GBy9cqCdz47UZc_Pr-Fg@mail.gmail.com>
X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.28; i686-w64-mingw32)
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/codec/SXLdxxWD_iTTEW5JfvwaxPzrHBU>
Cc: codec@ietf.org
Subject: Re: [codec] Ambisonics in an Ogg Opus Container
X-BeenThere: codec@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Codec WG <codec.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/codec>, <mailto:codec-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/codec/>
List-Post: <mailto:codec@ietf.org>
List-Help: <mailto:codec-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/codec>, <mailto:codec-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 31 May 2016 18:56:31 -0000

On Tue, 31 May 2016 11:38:37 -0700
Michael Graczyk <mgraczyk@google.com> wrote:

> In lieu of the SA3D box's explicit metadata, this draft requires that
> the ambisonic streams use ACN channel ordering and SN3D normalization.
> The channel count and channel mapping are contained in the Ogg
> identification header. I believe the only thing missing here is the
> SA3D box's "ambisonic_type" field. I would like to require periphonic
> (full 3D) ambisonics in this draft. I added the word "periphonic" to
> section 3.1.

The "ambisonic_type" (as defined in the spatial audio RFC) now only
allows 0 for "periphonic". Other values could be added, like 1 for
"mixed-order", 2 for "horizontal" and 3 for "UHJ".
--
Marc

v2.23.0 | Report a Bug | By Email