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Wednesday, October 19 • 11:30am - 12:00pm
A Closer Look on Bitrate Requirements for Opus with First Order Ambisonics and AllRAD rendering to 5.1 and 7.1.4

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In a previous study, transparency bitrates were found for Opus compression of Ambisonics content for the second and third order cases, but results were inconclusive for the first order. In this paper, we take a closer look on Basic Audio Quality of first order native Ambisonic content compressed with the Opus audio codec at 24, 32 and 48 kbps bitrates per channel. We present the results of a MUSHRA subjective test for Ambisonics in Opus decoded to ITU-R BS.2051-2 speaker layouts (viz., 5.1 and 7.1.4) using IEM AllRAD decoder. Results revealed that for music content, transparency can be achieve between 32 and 48 kbps per channel. However, 64 kbps per channel seems to be more suited for ambient content.


Ema Souza Blanes

Samsung Research America

Carlos Tejeda-Ocampo

Samsung Research Tijuana
avatar for Sunil Bharitkar

Sunil Bharitkar

Samsung Research America

Wednesday October 19, 2022 11:30am - 12:00pm EDT