From email at holger-strauss.de Tue Aug 3 09:09:00 2021
From: email at holger-strauss.de (Holger Strauss)
Date: Tue, 3 Aug 2021 11:09:00 +0200
Subject: [opus] .opus test set
Message-ID: <000501d78847$33c9aeb0$9b5d0c10$@holger-strauss.de>
Hi,
on page https://www.opus-codec.org/docs/, in the Test Vectors section at the
bottom, there is a link to "The .opus test set", referring to
https://people.xiph.org/~greg/opus_testvectors/.
Unfortunately, this test set is not available any more.
Some of these files are still available using the wayback machine:
https://web.archive.org/web/20191223064407/https://people.xiph.org/~greg/opu
s_testvectors/
However, all files in the failure_cases und the opus_multichannel_examples
folders seem to be gone. Can these be accessed somewhere else? Are there
alternatives?
Thanks in advance.
Holger
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From flatmax at flatmax.com Tue Aug 3 11:16:42 2021
From: flatmax at flatmax.com (Matt Flax)
Date: Tue, 3 Aug 2021 21:16:42 +1000
Subject: [opus] vector quantisation
Message-ID:
Hi there,
I was reading about pyramid vector quantisation and it was mentioned
that Opus uses this type of encoding.
I understand that Opus has many different steps in the encoding process,
it is rather formidable !
Are the encoding methods used in Opus based on polar or spherical
components ?
Does opus encode polar movements ?
thanks
Matt