With the increasing popularity of immersive audio, using legacy tools for these new formats can be challenging. This paper presents an overview of how to utilize the Opus audio codec for object-based audio. We reviewed the performance of Opus using two different bit-allocation strategies: a vanilla method that uses the same bitrate for each object, and a joint allocation method that distributes the total bitrate among objects using their perceptual importance. The proposed joint allocation outperformed the vanilla method at half the total bitrate, and achieved an "Excellent" score during MUSHRA testing at 480 kbit/s for content with 20 objects.

Authors: Hirvonen, Toni; Tejeda-Ocampo, Carlos; Souza-Blanes, Ema; Bharitkar, Sunil
Affiliations: Samsung Research America; Samsung Research Tijuana; Samsung Research America; Samsung Research America(See document for exact affiliation information.)
Express Paper 125; AES Convention 155; October 2023
Publication Date: October 25, 2023 Import into BibTeX
Subject: Immersive & Spatial Audio
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=22279

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