Re: [codec] IANA Opus mapping comments on draft-ietf-codec-ambisonics-08

John Ridges <jridges@masque.com> Fri, 10 August 2018 19:36 UTC

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To: codec@ietf.org, draft-ietf-codec-ambisonics@ietf.org
References: <mailman.98.1533927626.26676.codec@ietf.org>
Cc: Ralph Giles <giles@thaumas.net>, Jan Skoglund <jks@google.com>, Tim Terriberry <tterriberry@mozilla.com>
From: John Ridges <jridges@masque.com>
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Date: Fri, 10 Aug 2018 13:35:58 -0600
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Subject: Re: [codec] IANA Opus mapping comments on draft-ietf-codec-ambisonics-08
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On 8/9/2018 6:21 PM, Ralph Giles <giles@thaumas.net> wrote:
> From:
> Ralph Giles <giles@thaumas.net> You say the mixing matrix is "stored 
> column-wise." I assume this means the order of the coefficients in the 
> file is D11, D21, ..., DC1, D12, D22, ..., D1K, D2K, ..., DCK. Is that 
> correct? Since matrix representation conventions vary, I suggest being 
> more explicit here,
> perhaps by listing a few coefficients in figure 4.

I believe the technical term for a matrix "stored column-wise" is that 
the matrix is stored in "column-major order".
Re: https://en.wikipedia.org/wiki/Row-_and_column-major_order