High rate Direct Stream Digital (DSD) is emerging as a format of choice for distribution of high-definition audio content. However, real-time encoding of such streams requires considerable computing resources due to their high sampling rate, constraining implementations to hardware based platforms. In this paper we disclose a new modulator topology allowing for reduction in computational load and making real-time high rate DSD encoding suitable for software based implementation on off-the-shelf Digital Signal Processors (DSPs). We first present the architecture of the proposed modulator and then show results from a practical real-time implementation.

Authors: Heeb, Thierry; Leidi, Tiziano; Frei, Diego; Lavanchy, Alexandre
Affiliations: ISIN-SUPSI, Manno, Switzerland; Engineered SA, Yverdon-les-Bains, Switzerland(See document for exact affiliation information.)
AES Convention: 140 (May 2016) Paper Number: 9489
Publication Date: May 26, 2016
Subject: Audio Signal Processing: Coding, Encoding, and Perception

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