Method and apparatus for decomposing a stereo recording using frequency-domain processing employing a spectral weights generator

US9883307B2 · kind B2 · utility

Assignee

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

Inventors

• Christian Uhle · Nuremberg, DE
• Stefan Finauer · Erlangen, DE
• Patrick Gampp · Erlangen, DE
• Oliver Hellmuth · Erlangen, DE
• Peter Prokein · Erlangen, DE
• Christian Stoecklmeier · Erlangen, DE

Key dates

• Filing date: Jan 2, 2014
• Grant date: Jan 30, 2018
• Expiry date: Jan 17, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S3/002
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating a stereo side signal having a first side channel and a second side channel from a stereo input signal having a first input channel and a second input channel is provided. The apparatus has a modification information generator for generating modification information based on mid-side information. Furthermore, the apparatus has a signal manipulator being adapted to manipulate the first input channel based on the modification information to obtain the first side channel and being adapted to manipulate the second input channel based on the modification information to obtain the second side channel. The modification information generator has a spectral weights generator for generating the modification information by generating a first spectral weighting factor based on a mono mid signal and on a mono side signal of the stereo input signal.