Patent
Low bitrate audio encoding/decoding scheme with common preprocessing
Bernhard Grill,Stefan Bayer,Guillaume Fuchs,Stefan Geyersberger,Ralf Geiger,Johannes Hilpert,Ulrich Kraemer,Jeremie Lecomte,Markus Multrus,Max Neuendorf,Harald Popp,Nikolaus Rettelbach,Frederik Nagel,Sascha Disch,Juergen Herre,Yoshikazu Yokotani,Stefan Wabnik,Gerald Schuller,Jens Hirschfeld +18 more
- 06 Jul 2009
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TL;DR: An audio decoder comprises a spectral domain decoding branch, an LPC-domain decoding branch and one or more switches for switching between the branches and a common post processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.
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Abstract: An audio encoder comprises a common preprocessing stage (100), an information sink based encoding branch (400) such as spectral domain encoding branch, a information source based encoding branch (500) such as an LPC-domain encoding branch and a switch (200) for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage (300). An audio decoder comprises a spectral domain decoding branch, an LPC- domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.
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Citations
Patent
Multi-resolution switched audio encoding/decoding scheme
Max Neuendorf,Stefan Bayer,Jeremie Lecomte,Guillaume Fuchs,Julien Robilliard,Nikolaus Rettelbach,Frederik Nagel,Ralf Geiger,Markus Multrus,Bernhard Grill,Philippe Gournay,Redwan Salami +11 more
- 06 Dec 2012
TL;DR: In this paper, a signal analyzer for analyzing the audio signal is provided, which determines whether an audio portion is effective in the encoder output signal as a first encoded signal from the first encoding branch or as a second encoded message from a second encoding branch.
128
Patent
Low bitrate audio encoding/decoding scheme having cascaded switches
Bernhard Grill,Roch Lefebvre,Bessette Bruno,Jimmy Lapierre,Philippe Gournay,Redwan Salami,Stefan Bayer,Guillaume Fuchs,Geyersberger Stefan,Geiger Ralf,Hilpert Johannes,Kraemer Ulrich,Jeremie Lecomte,Markus Multrus,Max Neuendorf,Harald Popp,Nikolaus Rettelbach +16 more
- 26 Jun 2009
TL;DR: In this paper, an audio encoder comprises a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoder such as an LPC-domain decoding branch, and a switch for switching between the first encoding branch and the second encoding branch.
75
Patent
Method and apparatus for compressing and decompressing a Higher Order Ambisonics signal representation
Alexander Krueger,Sven Kordon,Johannes Boehm,Johann-Markus Batke +3 more
- 06 May 2013
TL;DR: In this article, a reduced-order ambient component is transformed to the spatial domain, and is perceptually coded together with the directional signals at the receiver side, the encoded directional signals and the order-reduced encoded ambient component are perceptually decompressed, the perceptually decressed ambient signals are transformed to an HOA domain representation of reduced order, followed by order extension.
62
Patent
MDCT-based complex prediction stereo coding
Heiko Purnhagen,Pontus Carlsson,Lars Villemoes +2 more
- 06 Apr 2011
TL;DR: In this article, the authors proposed a method for stereo encoding and decoding using complex prediction in the frequency domain, which comprises performing frequency-domain modifications selectively before or after upmixing.
47
Patent
Apparatus and method for merging geometry-based spatial audio coding streams
Giovanni Del Galdo,Oliver Thiergart,Juergen Herre,Fabian Kuech,Emanuel A. P. Habets,Alexandra Craciun,Achim Kuntz +6 more
- 30 Nov 2012
TL;DR: In this article, an apparatus for generating a merged audio data stream is presented, which consists of a demultiplexer (180) for obtaining a plurality of single-layer audio data streams, wherein the demuliplexers are adapted to receive one or more input data streams.
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Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic
Juergen Herre,Bernhard Grill,Markus Multrus,Stefan Bayer,Ulrich Kraemer,Jens Hirschfeld,Stefan Wabnik,Gerald Schuller +7 more
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TL;DR: In this article, a controller is connected for providing the time-varying control signal, which depends on the audio signal, and the controller is introduced to an encoding processor having different encoding algorithms adapted to a specific signal pattern.
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Juha Ojanpera
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