Patents by Inventor Jurgen Herre

Jurgen Herre has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180190303
    Abstract: An audio post-processor for post-processing an audio signal having a time-variable high frequency gain information as side information includes: a band extractor for extracting a high frequency band of the audio signal and a low frequency band of the audio signal; a high band processor for performing a time-variable modification of the high frequency band in accordance with the time-variable high frequency gain information to obtain a processed high frequency band; and a combiner for combining the processed high frequency band and the low frequency band. Furthermore, a pre-processor is illustrated.
    Type: Application
    Filed: January 30, 2018
    Publication date: July 5, 2018
    Inventors: Florin Ghido, Sascha Disch, Jürgen Herre, Alexander Adami, Franz Reutelhuber
  • Patent number: 9462404
    Abstract: In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: October 4, 2016
    Assignee: Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Jürgen Herre, Johannes Hilpert, Stefan Geyersberger, Andreas Hölzer, Claus Spenger
  • Patent number: 9043200
    Abstract: The present invention is based on the finding that parameters including: a first set of parameters of a representation of a first portion of an original signal and a second set of parameters of a representation of a second portion of the original signal can be efficiently encoded when the parameters are arranged in a first sequence of tuples and a second sequence of tuples. The first sequence of tuples includes tuples of parameters having two parameters from a single portion of the original signal and the second sequence of tuples includes tuples of parameters having one parameter from the first portion and one parameter from the second portion of the original signal. A bit estimator estimates the number of necessary bits to encode the first and the second sequence of tuples. Only the sequence of tuples, which results in the lower number of bits, is encoded.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: May 26, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Ralph Sperschneider, Jürgen Herre, Karsten Linzmeier, Johannes Hilpert
  • Patent number: 8538037
    Abstract: An audio signal decorrelator for deriving an output audio signal from an input audio signal has a frequency analyzer for extracting from the input audio signal a first partial signal descriptive of an audio content in a first audio frequency range and a second partial signal descriptive of an audio content in a second audio frequency range having higher frequencies compared to the second audio frequency range. A partial signal modifier modifies the first and second partial signals, to obtain first and second processed partial signals, so that a modulation amplitude of a time variant phase shift or time variant delay applied to the first partial signal is higher than that applied to the second partial signal, or for modifying only the first partial signal. A signal combiner combines the first and second processed partial signals, or combines the first processed partial signal and the second partial signal, to obtain an output audio signal.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: September 17, 2013
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Jürgen Herre, Herbert Buchner
  • Publication number: 20130016843
    Abstract: In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information.
    Type: Application
    Filed: August 17, 2012
    Publication date: January 17, 2013
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG e.V.
    Inventors: JÜRGEN HERRE, JOHANNES HILPERT, STEFAN GEYERSBERGER, ANDREAS HÖLZER, CLAUS SPENGER
  • Patent number: 8175730
    Abstract: In order to analyze an information signal, a significant short-time spectrum is extracted from the information signal, the means for extracting being configured to extract such short-time spectra which come closer to a specific characteristic than other short-time spectra of the information signal. The short-time spectra extracted are then decomposed into component signals using ICA analysis, a component signal spectrum representing a profile spectrum of a tone source which generates a tone corresponding to the characteristic sought for. From a sequence of short-time spectra of the information signal and from the profile spectra determined, an amplitude envelope is eventually calculated for each profile spectrum, the amplitude envelope indicating how a profile spectrum of a tone source all in all changes over time.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: May 8, 2012
    Assignee: SONY Corporation
    Inventors: Christian Dittmar, Christian Uhle, Jürgen Herre
  • Patent number: 8054981
    Abstract: Parameters being a measure for a characteristic of a channel or of a pair of channels, wherein the parameter is a measure for a characteristic of the channel or of the pair of channels with respect to another channel of a multi-channel signal can be quantized more efficiently using a quantization rule that is generated based on a relation of an energy measure of the channel or the pair of channels and an energy measure of the multi-channel signal. With generation of the quantization rule taking into account a psycho acoustic approach, the size of an encoded representation of the multi-channel signal can be decreased by coarser quantization without significantly disturbing the perceptual quality of the multi-channel signal when reconstructed from the encoded representation.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: November 8, 2011
    Assignees: Coding Technologies AB, Koninklijke Philips Electronics N.V., Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forshung E.V.
    Inventors: Jonas Röden, Jonas Engdegard, Heiko Purnhagen, Jeroen Breebaart, Erik Schuijers, Steven van de Par, Johannes Hilpert, Jürgen Herre
  • Publication number: 20110235810
    Abstract: An apparatus and a method for generating a multi-channel synthesizer control signal, a multi-channel synthesizer, a method of generating an output signal from an input signal and a machine-readable storage medium are provided. On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.
    Type: Application
    Filed: June 13, 2011
    Publication date: September 29, 2011
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V., CODING TECHNOLOGIES AB, KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: MATTHIAS NEUSINGER, JÜRGEN HERRE, SASCHA DISCH, HEIKO PURNHAGEN, KRISTOFER KJÖRLING, JONAS ENGDEGARD, JEROEN BREEBAART, ERIK SCHUIJERS, WERNER OOMEN
  • Patent number: 7991610
    Abstract: The present invention is based on the finding that parameters including a first set of parameters of a representation of a first portion of an original signal and including a second set of parameters of a representation of a second portion of the original signal can be efficiently encoded, when the parameters are arranged in a first sequence of tuples and in a second sequence of tuples, wherein the first sequence of tuples comprises tuples of parameters having two parameters from a single portion of the original signal and wherein the second sequence of tuples comprises tuples of parameters having one parameter from the first portion and one parameter from the second portion of the original signal. An efficient encoding can be achieved using a bit estimator to estimate the number of necessary bits to encode the first and the second sequence of tuples, wherein only the sequence of tuples is encoded, that results in the lower number of bits.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: August 2, 2011
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Ralph Sperschneider, Jürgen Herre, Karsten Linzmeier, Johannes Hilpert
  • Patent number: 7983922
    Abstract: On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: July 19, 2011
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Matthias Neusinger, Jürgen Herre, Sascha Disch, Heiko Purnhagen, Kristofer Kjörling, Jonas Engdegard, Jeroen Breebaart, Erik Schuijers, Werner Oomen
  • Patent number: 7983424
    Abstract: The envelope of a decorrelated signal derived from an original signal can be shaped without introducing additional distortion, when a spectral flattener is used to spectrally flatten the spectrum of the decorrelated signal and the original signal prior to using the flattened spectra for deriving a gain factor describing the energy distribution between the flattened spectra, and when the so derived gain factor is used by an envelope shaper to timely shape the envelope of the decorrelated signal.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: July 19, 2011
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V., Coding Technologies AB
    Inventors: Kristofer Kjörling, Jürgen Herre, Sascha Disch, Lars Villemoes
  • Patent number: 7961890
    Abstract: A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: June 14, 2011
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung, e.V., Coding Technologies AB, Koninklijke Philips Electronics N.V.
    Inventors: Andreas Hölzer, Jürgen Herre, Heiko Purnhagen, Kristofer Kjörling, Jonas Röden, Lars Villemoes, Jonas Engdegard, Jeroen Breebaart, Erik Schuijers, Werner Oomen
  • Publication number: 20110060598
    Abstract: The present invention is based on the finding that parameters including: a first set of parameters of a representation of a first portion of an original signal and a second set of parameters of a representation of a second portion of the original signal can be efficiently encoded when the parameters are arranged in a first sequence of tuples and a second sequence of tuples. The first sequence of tuples includes tuples of parameters having two parameters from a single portion of the original signal and the second sequence of tuples includes tuples of parameters having one parameter from the first portion and one parameter from the second portion of the original signal. A bit estimator estimates the number of necessary bits to encode the first and the second sequence of tuples. Only the sequence of tuples, which results in the lower number of bits, is encoded.
    Type: Application
    Filed: November 17, 2010
    Publication date: March 10, 2011
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: RALPH SPERSCHNEIDER, JÜRGEN HERRE, KARSTEN LINZMEIER, JOHANNES HILPERT
  • Patent number: 7788106
    Abstract: The present invention is based on the finding that an efficient code for encoding information values can be derived, when two or more information values are grouped in a tuple in a tuple order and when an encoding rule is used, that assigns the same code word to tuples having identical information values in different orders and that does derive an order information, indicating the tuple order, and when the code word is output in association with the order information.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: August 31, 2010
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Ralph Sperschneider, Jürgen Herre, Karsten Linzmeier, Johannes Hilpert
  • Patent number: 7760886
    Abstract: For synthesizing at least three output channels using two stereo input channels, the stereo input channels are analyzed to detect signal components occurring in both input channels. A signal generator is operative to introduce at least a part of the detected signal components into the second channel associated with a second speaker in an intended speaker scheme, which is positioned between a first and a third speaker in the speaker scheme. When, however, feeding of the complete detected signal components would result in a clipping situation, then only a part of the detected signal components is fed into the second channel as a real center channel and the remainder is located in the first and third channels as a phantom center channel.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: July 20, 2010
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forscheng e.V.
    Inventors: Oliver Hellmuth, Jürgen Herre, Harald Popp, Andreas Walther
  • Publication number: 20090304198
    Abstract: An audio signal decorrelator for deriving an output audio signal from an input audio signal has a frequency analyzer for extracting from the input audio signal a first partial signal descriptive of an audio content in a first audio frequency range and a second partial signal descriptive of an audio content in a second audio frequency range having higher frequencies compared to the second audio frequency range. A partial signal modifier for modifies the first and second partial signals, to obtain first and second processed partial signals, so that a modulation amplitude of a time variant phase shift or time variant delay applied to the first partial signal is higher than that applied to the second partial signal, or for modifying only the first partial signal. A signal combiner combines the first and second processed partial signals, or combines the first processed partial signal and the second partial signal, to obtain an output audio signal.
    Type: Application
    Filed: March 28, 2007
    Publication date: December 10, 2009
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Jürgen Herre, Herbert Buchner
  • Publication number: 20090265024
    Abstract: In order to analyze an information signal, a significant short-time spectrum is extracted from the information signal, the means for extracting being configured to extract such short-time spectra which come closer to a specific characteristic than other short-time spectra of the information signal. The short-time spectra extracted are then decomposed into component signals using ICA analysis, a component signal spectrum representing a profile spectrum of a tone source which generates a tone corresponding to the characteristic sought for. From a sequence of short-time spectra of the information signal and from the profile spectra determined, an amplitude envelope is eventually calculated for each profile spectrum, the amplitude envelope indicating how a profile spectrum of a tone source all in all changes over time.
    Type: Application
    Filed: June 30, 2009
    Publication date: October 22, 2009
    Inventors: Christian Dittmar, Christean Uhle, Jurgen Herre
  • Patent number: 7565213
    Abstract: A significant short-time spectrum is extracted from an information signal, the means for extracting being configured to extract such short-time spectra which come closer to a specific characteristic than others. The short-time spectra extracted are then decomposed into component signals using ICA analysis, a component signal spectrum representing a profile spectrum of a tone source which generates a tone corresponding to the characteristic sought. From a sequence of short-time spectra of the information signal and from the profile spectra determined, an amplitude envelope is calculated for each profile spectrum to indicate how a tone source profile spectrum changes over time. The profile spectra and all the amplitude envelopes associated therewith provide a description of the information signal which may be evaluated further, for example for transcription purposes in the case of a music signal.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: July 21, 2009
    Assignee: Gracenote, Inc.
    Inventors: Christian Dittmar, Christian Uhle, Jürgen Herre
  • Patent number: 7512539
    Abstract: An integer transform, which provides integer output values, carries out the TDAC function of a MDCT in the time domain before the forward transform. In overlapping windows, this results in a Givens rotation which may be represented by lifting matrices, wherein time-discrete sampled values of an audio signal may at first be summed up on a pair-wise basis to build a vector so as to be sequentially provided with a lifting matrix. After each multiplication of a vector by a lifting matrix, a rounding step is carried out such that, on the output-side, only integers will result. By transforming the windowed integer sampled value with an integer transform, a spectral representation with integer spectral values may be obtained. The inverse mapping with an inverse rotation matrix and corresponding inverse lifting matrices results in an exact reconstruction.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: March 31, 2009
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Ralf Geiger, Thomas Sporer, Karlheinz Brandenburg, Jürgen Herre, Jürgen Koller
  • Patent number: 7478045
    Abstract: In a method for characterizing a signal representing an audio content a measure is determined for a tonality of the signal, whereupon a statement is made about the audio content of the signal on the basis of the measure for the tonality of the signal. The measure for the tonality is derived from a quotient whose numerator is the mean of the summed values of spectral components of the signal exponentiated with a first power and whose denominator is the mean of the summed values of spectral components exponentiated with a second power, the first and second powers differing from each other. The measure for the tonality of the signal for the content analysis is robust in relation to a signal distortion, due e.g. to MP3 coding, and has a high correlation with the content of the analyzed signal.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: January 13, 2009
    Assignee: M2ANY GmbH
    Inventors: Eric Allamanche, Jürgen Herre, Oliver Hellmuth, Thorsten Kastner