Multisignal audio coding using signal whitening as processing

US12367883B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Eleni FOTOPOULOU · Erlangen, DE
• Markus Multrus · Nuremberg, DE
• Sascha Dick · Nuremberg, DE
• Goran Markovic · Nuremberg, DE
• Pallavi Maben · Erlangen, DE
• Srikanth KORSE · Erlangen, DE
• Stefan Bayer · Nuremberg, DE
• Sascha Disch · Bad Mergentheim, DE
• Jürgen Herre · Buckenhof, DE

Key dates

• Filing date: Dec 17, 2020
• Grant date: Jul 22, 2025
• Expiry date: Mar 20, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/03
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A multisignal encoder for encoding at least three audio signals, including: a signal preprocessor for individually preprocessing each audio signal to obtain at least three preprocessed audio signals, wherein the preprocessing is performed so that a preprocessed audio signal is whitened with respect to the signal before preprocessing; an adaptive joint signal processor for performing a processing of the at least three preprocessed audio signals to obtain at least three jointly processed signals or at least two jointly processed signals and an unprocessed signal; a signal encoder for encoding each signal to obtain one or more encoded signals; and an output interface for transmitting or storing an encoded multisignal audio signal including the one or more encoded signals, side information relating to the preprocessing and side information relating to the processing.