Apparatus and method for generating a multi-channel output signal

US7391870B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• Agere Systems Inc. · US

Inventors

• Jürgen Herre · Buckenhof, DE
• Christof Faller · New Providence, US
• Sascha Disch · Bad Mergentheim, DE
• Johannes Hilpert · Nuremberg, DE

Key dates

• Filing date: Sep 7, 2004
• Grant date: Jun 24, 2008
• Expiry date: Dec 4, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/03
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator for calculating a cancellation channel using information related to the original center channel available at the decoder. The device furthermore includes a combiner for combining a transmission channel with the cancellation channel. Finally, the apparatus includes a reconstructor for generating the multi-channel output signal. Due to the center channel cancellation, the channel reconstructor not only uses a different base channel for reconstructing the center channel but also uses base channels different from the transmission channels for reconstructing left and right output channels which have a reduced or even completely cancelled influence of the original center channel.