Noise-shaping device and method with improved losless compression and good audio quality for high fidelity audio

D. Reefman (Inventor), P.J.A. Harpe (Inventor), E.E. Janssen (Inventor)

Research output: PatentPatent publication

Abstract

Improved sigma-delta modulator (SDM) for 1-bit digital audio noise shaping. It is the object to produce a bit stream that is compatible with the Scarlet Book specification (Super Audio CD standard, SACD) and that achieves a higher lossless compression ratio when compressed and decompressed according to the standard. This goal is achieved by using a trellis-based SDM and/or a prediction filter within the SDM that is similar or identical to the prediction filter in the encoder. The trellis SDM is designed to produce a predicted signal from a range of candidate signals that is as close to the input signal as possible.
Original languageEnglish
Patent numberUS20070290906
Publication statusPublished - 20 Dec 2007

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