Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Koninklijke Philips Corporation N.v.

Dolby International Ab

Voiceage Corporation

Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Max Neuendorf

Nikolaus Rettelbach

Ralf Geiger

Sascha Disch

Stefan Bayer

Markus Multrus

Frederik Nagel

Bernhard Grill

Guillaume Fuchs

Ulrich Kraemer

Stefan Geyersberger

Markus Lohwasser

Harald Popp

Philippe Gournay

Matthias Hildenbrand

Stefan Doehla

Redwan Salami

Bruno Bessette

Johannes Hilpert

Manuel Jander

Roch Lefebvre

Juergen Herre

Bernd Edler

Gerald Schuller

Ingo Hofmann

Markus Schnell

Daniel Fischer

Marc Gayer

Jeremie Lecomte

Jérémie Lecomte

Christian Helmrich

Harald Fuchs

Bernd Czelhan

Heiko Purnhagen

Andreas Niedermeier

Stefan Wabnik

Achim Kuntz

Michael Kratschmer

Herbert Thoma

Stefan Kraegeloh

Jan Plogsties

Julien Robilliard

Stephan Wilde

Benjamin Schubert

Lars Villemoes

Jürgen Herre

Simone Neukam

Tom Baeckstroem

Michael Schug

Albertus Cornelis Den Brinker

Stefan Döhla

Jimmy Lapierre

Tobias Chalupka

Nikolaus Faerber

Yoshikazu Yokotani

Dominik Zorn

Frans De Bont

Robert Bleidt

Virgilio Bacigalupo

Jens Hirschfeld

Stefan Krägeloh

Daniel Richter

Matthias Felix

Lukas Schuster

Bernd Herrmann

Christian Spitzner

Andreas Neidermeier

Bernard Grill

Stefam Geyersberger

Raif Geiger

Stefan Dohla

Nikolaus Farber

Simone Fueg

Wahaj Aslam

An apparatus for generating a bandwidth extended signal from an input signal includes a patch generator and a combiner. The input signal is represented for first and second bands by first and second resolution data, respectively, the second resolution being lower than the first. The patch generator generates first and second patches from the first band of the input signal according to first and second patching algorithms, respectively. A spectral density of the second patch generated using the second patching algorithm is higher than a spectral density of a first patch generated using the first patching algorithm. The combiner combines both patches and the first band of the input signal to obtain the bandwidth extended signal. The apparatus scales the input signal according to the first and second patching algorithms or scales the first and second patches, so that the bandwidth extended signal fulfills a spectral envelope criterion.

Apparatus and method for generating a bandwidth extended signal

A device and method for manipulating an audio signal includes a windower for generating a plurality of consecutive blocks of audio samples, the plurality of consecutive blocks including at least one padded block of audio samples, the padded block having padded values and audio signal values, a first converter for converting the padded block into a spectral representation having spectral values, a phase modifier for modifying phases of the spectral values to obtain a modified spectral representation and a second converter for converting the modified spectral representation into a modified time domain audio signal.

Device and method for manipulating an audio signal

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

An audio decoder decodes a bit stream of encoded audio data, which bit stream represents a sequence of audio sample values and includes a plurality of frames, wherein each frame includes associated encoded audio sample values. The audio decoder includes a determiner configured to determine whether a frame of the encoded audio data is a special frame including encoded audio sample values associated with the special frame and additional information, wherein the additional information include encoded audio sample values of a number of frames preceding the special frame, wherein the encoded audio sample values of the preceding frames are encoded using the same codec configuration as the special frame, wherein the number of preceding frames is sufficient to initialize the decoder to be in a position to decode the audio sample values associated with the special frame if the special frame is the first frame upon start-up of the decoder.

Audio decoder, apparatus for generating encoded audio output data and methods permitting initializing a decoder

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Nuremberg, Germany

Max Neuendorf