Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Voiceage Corporation

Jimmy Lapierre

Markus Multrus

Guillaume Fuchs

Johannes Hilpert

Nikolaus Rettelbach

Max Neuendorf

Stefan Bayer

Harald Popp

Redwan Salami

Bruno Bessette

Ulrich Kraemer

Philippe Gournay

Roch Lefebvre

Bernhard Grill

Ralf Geiger

Stefan Geyersberger

Jérémie Lecomte

Bernard Grill

Stefam Geyersberger

Raif Geiger

Ulrich KRÄMER

An audio encoder has a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first and second encoding branches, the second encoding branch having a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and the second encoding branch having a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder has a first domain decoder, a second domain decoder, and a third domain decoder as well as two cascaded switches for switching between the decoders.

Low bitrate audio encoding/decoding scheme having cascaded switches

Audio decoding device and method with decoding branches for decoding audio signal encoded in a plurality of domains

An audio encoder has a first information sink oriented encoding branch, a second information source or SNR oriented encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch has a converter into a specific domain different from the spectral domain, and wherein the second encoding branch furthermore has a specific domain coding branch, and a specific spectral domain coding branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder has a first domain decoder, a second domain decoder for decoding a signal, and a third domain decoder and two cascaded switches for switching between the decoders.

An apparatus for encoding includes a first domain converter, a switchable bypass, a second domain converter, a first processor and a second processor to obtain an encoded audio signal having different signal portions represented by coded data in different domains, which have been coded by different coding algorithms. Corresponding decoding stages in the decoder together with a bypass for bypassing a domain converter allow the generation of a decoded audio signal with high quality and low bit rate.

Audio encoding/decoding scheme having a switchable bypass

Growing community of inventors

Sherbrooke, Canada

Jimmy Lapierre