Patents by Inventor Christian Ertel

Christian Ertel 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: 20170318408
    Abstract: An apparatus for generating a plurality of audio channels for a first speaker setup is characterized by an imaginary speaker determiner, an energy distribution calculator, a processor and a renderer. The imaginary speaker determiner is configured to determine a position of an imaginary speaker not contained in the first speaker setup to obtain a second speaker setup containing the imaginary speaker. The energy distribution calculator is configured to calculate an energy distribution from the imaginary speaker to the other speakers in the second speaker setup. The processor is configured to repeat the energy distribution to obtain a downmix information for a downmix from the second speaker setup to the first speaker setup. The renderer is configured to generate the plurality of audio channels using the downmix information.
    Type: Application
    Filed: July 14, 2017
    Publication date: November 2, 2017
    Inventors: Christian BORSS, Christian ERTEL, Johannes HILPERT, Achim KUNTZ, Michael FISCHER, Florian SCHUH, Bernhard GRILL
  • Publication number: 20170311106
    Abstract: An apparatus for generating one or more audio channels is provided. The apparatus includes a metadata decoder for receiving one or more compressed metadata signals. Each of the one or more compressed metadata signals includes a plurality of first metadata samples. The metadata decoder is configured to generate one or more reconstructed metadata signals and to generate each of the second metadata samples of each reconstructed metadata signal of the one or more reconstructed metadata signals depending on at least two of the first metadata samples of the reconstructed metadata signal. The apparatus includes an audio channel generator for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. An apparatus for generating encoded audio information including one or more encoded audio signals and one or more compressed metadata signals is provided.
    Type: Application
    Filed: July 12, 2017
    Publication date: October 26, 2017
    Inventors: Christian BORSS, Christian ERTEL
  • Patent number: 9788136
    Abstract: An apparatus for generating one or more audio channels is provided. The apparatus comprises a metadata decoder for generating one or more reconstructed metadata signals from one or more processed metadata signals depending on a control signal, wherein each of the one or more reconstructed metadata signals indicates information associated with an audio object signal of one or more audio object signals, wherein the metadata decoder is configured to generate the one or more reconstructed metadata signals by determining a plurality of reconstructed metadata samples for each of the one or more reconstructed metadata signals. The apparatus comprises an audio channel generator for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. The metadata decoder is configured to receive a plurality of processed metadata samples of each of the one or more processed metadata signals.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: October 10, 2017
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Borss, Christian Ertel, Johannes Hilpert
  • Patent number: 9743210
    Abstract: An apparatus for generating one or more audio channels is provided. The apparatus includes a metadata decoder for receiving one or more compressed metadata signals. Each of the one or more compressed metadata signals includes a plurality of first metadata samples. The metadata decoder is configured to generate one or more reconstructed metadata signals and to generate each of the second metadata samples of each reconstructed metadata signal of the one or more reconstructed metadata signals depending on at least two of the first metadata samples of the reconstructed metadata signal. The apparatus includes an audio channel generator for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. An apparatus for generating encoded audio information including one or more encoded audio signals and one or more compressed metadata signals is provided.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: August 22, 2017
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Borss, Christian Ertel
  • Patent number: 9729995
    Abstract: An apparatus for generating a plurality of audio channels for a first speaker setup is characterized by an imaginary speaker determiner, an energy distribution calculator, a processor and a renderer. The imaginary speaker determiner is configured to determine a position of an imaginary speaker not contained in the first speaker setup to obtain a second speaker setup containing the imaginary speaker. The energy distribution calculator is configured to calculate an energy distribution from the imaginary speaker to the other speakers in the second speaker setup. The processor is configured to repeat the energy distribution to obtain a downmix information for a downmix from the second speaker setup to the first speaker setup. The renderer is configured to generate the plurality of audio channels using the downmix information.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: August 8, 2017
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Borss, Christian Ertel, Johannes Hilpert, Achim Kuntz, Michael Fischer, Florian Schuh, Bernhard Grill
  • Publication number: 20160316309
    Abstract: An apparatus for generating a plurality of audio channels for a first speaker setup is characterized by an imaginary speaker determiner, an energy distribution calculator, a processor and a renderer. The imaginary speaker determiner is configured to determine a position of an imaginary speaker not contained in the first speaker setup to obtain a second speaker setup containing the imaginary speaker. The energy distribution calculator is configured to calculate an energy distribution from the imaginary speaker to the other speakers in the second speaker setup. The processor is configured to repeat the energy distribution to obtain a downmix information for a downmix from the second speaker setup to the first speaker setup. The renderer is configured to generate the plurality of audio channels using the downmix information.
    Type: Application
    Filed: July 5, 2016
    Publication date: October 27, 2016
    Inventors: Christian BORSS, Christian ERTEL, Johannes HILPERT, Achim KUNTZ, Michael FISCHER, Florian SCHUH, Bernhard GRILL
  • Publication number: 20160275957
    Abstract: An audio decoder for providing at least four audio channel signals on the basis of an encoded representation is configured to provide a first residual signal and a second residual signal on the basis of a jointly encoded representation of the first residual signal and of the second residual signal using a multi-channel decoding. The audio decoder is configured to provide a first audio channel signal and a second audio channel signal on the basis of a first downmix signal and the first residual signal using a residual-signal-assisted multi-channel decoding. The audio decoder is configured to provide a third audio channel signal and a fourth audio channel signal on the basis of a second downmix signal and the second residual signal using a residual-signal-assisted multi-channel decoding. An audio encoder is based on corresponding considerations.
    Type: Application
    Filed: May 27, 2016
    Publication date: September 22, 2016
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewan dten Forschung e.V.
    Inventors: Sascha DICK, Christian ERTEL, Christian HELMRICH, Johannes HILPERT, Andreas HOELZER, Achim KUNTZ
  • Publication number: 20160247508
    Abstract: An audio decoder for providing at least four bandwidth-extended channel signals on the basis of an encoded representation provides first and second downmix signals on the basis of a jointly encoded representation of the first and second downmix signals using a multi-channel decoding and provides at least first and second audio channel signals on the basis of the first downmix signal using a multi-channel decoding, and provides at least third and fourth audio channel signals on the basis of the second downmix signal using a multi-channel decoding. It performs a multi-channel bandwidth extension on the basis of the first and third audio channel signals, to obtain first and third bandwidth-extended channel signals, and performs a multi-channel bandwidth extension on the basis of the second and fourth audio channel signals, to obtain second and fourth bandwidth extended channel signals. An audio encoder uses a related concept.
    Type: Application
    Filed: January 22, 2016
    Publication date: August 25, 2016
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Sascha DICK, Christian ERTEL, Christian HELMRICH, Johannes HILPERT, Andreas HOELZER, Achim KUNTZ
  • Publication number: 20160247509
    Abstract: An audio decoder for providing at least four audio channel signals on the basis of an encoded representation is configured to provide a first residual signal and a second residual signal on the basis of a jointly encoded representation of the first residual signal and of the second residual signal using a multi-channel decoding. The audio decoder is configured to provide a first audio channel signal and a second audio channel signal on the basis of a first downmix signal and the first residual signal using a residual-signal-assisted multi-channel decoding. The audio decoder is configured to provide a third audio channel signal and a fourth audio channel signal on the basis of a second downmix signal and the second residual signal using a residual-signal-assisted multi-channel decoding. An audio encoder is based on corresponding considerations.
    Type: Application
    Filed: January 22, 2016
    Publication date: August 25, 2016
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Sascha DICK, Christian ERTEL, Christian HELMRICH, Johannes HILPERT, Andreas HOELZER, Achim KUNTZ
  • Publication number: 20160157040
    Abstract: An audio decoder device for decoding a compressed input audio signal having at least one core decoder having one or more processors for generating a processor output signal based on a processor input signal, wherein a number of output channels of the processor output signal is higher than a number of input channels of the processor input signal, wherein each of the one or more processors has a decorrelator and a mixer, wherein a core decoder output signal having a plurality of channels has the processor output signal, and wherein the core decoder output signal is suitable for a reference loudspeaker setup; at least one format converter device configured to convert the core decoder output signal into an output audio signal, which is suitable for a target loudspeaker setup; and a control device configured to control at least one or more processors in such way that the decorrelator of the processor may be controlled independently from the mixer of the processor, wherein the control device is configured to contro
    Type: Application
    Filed: January 22, 2016
    Publication date: June 2, 2016
    Inventors: Christian ERTEL, Johannes HILPERT, Andreas HOELZER, Achim KUNTZ, Jan PLOGSTIES, Michael KRATSCHMER
  • Publication number: 20160140981
    Abstract: An apparatus for decoding an encoded audio signal having an encoded representation of a first set of first spectral portions and an encoded representation of parametric data indicating spectral energies for a second set of second spectral portions, has: an audio decoder for decoding the encoded representation of the first set of the first spectral portions to obtain a first set of first spectral portions and for decoding the encoded representation of the parametric data to obtain a decoded parametric data for the second set of second spectral portions indicating, for individual reconstruction bands, individual energies; a frequency regenerator for reconstructing spectral values in a reconstruction band having a second spectral portion using a first spectral portion of the first set of the first spectral portions and an individual energy for the reconstruction band, the reconstruction band having a first spectral portion and the second spectral portion.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 19, 2016
    Inventors: Andreas NIEDERMEIER, Christian ERTEL, Ralf GEIGER, Florin GHIDO, Christian HELMRICH
  • Publication number: 20160142850
    Abstract: An apparatus for generating one or more audio channels is provided. The apparatus includes a metadata decoder for receiving one or more compressed metadata signals. Each of the one or more compressed metadata signals includes a plurality of first metadata samples. The metadata decoder is configured to generate one or more reconstructed metadata signals and to generate each of the second metadata samples of each reconstructed metadata signal of the one or more reconstructed metadata signals depending on at least two of the first metadata samples of the reconstructed metadata signal. The apparatus includes an audio channel generator for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. An apparatus for generating encoded audio information including one or more encoded audio signals and one or more compressed metadata signals is provided.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 19, 2016
    Inventors: Christian BORSS, Christian ERTEL
  • Publication number: 20160133267
    Abstract: Audio encoder for encoding audio input data to obtain audio output data includes an input interface for receiving a plurality of audio channels, a plurality of audio objects and metadata related to one or more of the plurality of audio objects; a mixer for mixing the plurality of objects and the plurality of channels to obtain a plurality of pre-mixed channels, each pre-mixed channel including audio data of a channel and audio data of at least one object; a core encoder for core encoding core encoder input data; and a metadata compressor for compressing the metadata related to the one or more of the plurality of audio objects, wherein the audio encoder is configured to operate in at least one mode of the group of two modes.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 12, 2016
    Inventors: Alexander ADAMI, Christian BORSS, Sascha DISCH, Christian ERTEL, Simone FUEG, Juergen HERRE, Johannes HILPERT, Andreas HOELZER, Michael KRATSCHMER, Fabian KUECH, Achim KUNTZ, Adrian MURTAZA, Jan PLOGSTIES, Andreas SILZLE, Hanne STENZEL
  • Publication number: 20160133263
    Abstract: An apparatus for generating one or more audio channels is provided. The apparatus comprises a metadata decoder for generating one or more reconstructed metadata signals from one or more processed metadata signals depending on a control signal, wherein each of the one or more reconstructed metadata signals indicates information associated with an audio object signal of one or more audio object signals, wherein the metadata decoder is configured to generate the one or more reconstructed metadata signals by determining a plurality of reconstructed metadata samples for each of the one or more reconstructed metadata signals. The apparatus comprises an audio channel generator for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. The metadata decoder is configured to receive a plurality of processed metadata samples of each of the one or more processed metadata signals.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 12, 2016
    Inventors: Christian Borss, Christian Ertel, Johannes Hilpert
  • Patent number: 8843378
    Abstract: A multi-channel synthesizer includes a post processor for determining post processed reconstruction parameters or quantities derived from the reconstruction parameter for an actual time portion of the input signal so that the post processed reconstruction parameter or the post processed quantity is different from the corresponding quantized and inversely quantized reconstruction parameter in that the value of the post processed reconstruction parameter or the derived quantity is not bound by the quantization step size. A multi-channel reconstructor uses the post-processed reconstruction parameter for reconstructing the multi-channel output signal.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: September 23, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Juergen Herre, Sascha Disch, Johannes Hilpert, Christian Ertel, Andreas Hoelzer, Claus-Christian Spenger
  • Patent number: 8731204
    Abstract: For flexibly signaling a synchronous mode or an asynchronous mode in the multi-channel parameter reconstruction, a parameter configuration cue is inserted in the data stream, which is used by a configurator on the side of a multi-channel decoder to configure a multi-channel reconstructor. If the parameter configuration cue has a first meaning, the configurator will look for further configuration information in its input data, while, when the parameter configuration cue has another meaning, the configurator performs a configuration setting of the multi-channel reconstructor based on information on a coding algorithm with which transmission channel data have been coded, so that it is ensured efficiently on the one hand and flexibly on the other hand that there will always be obtained a correct association between parameter data and decoded transmission channel data.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: May 20, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Ralph Sperschneider, Juergen Herre, Johannes Hilpert, Christian Ertel, Stefan Geyersberger
  • Patent number: 8606586
    Abstract: A bandwidth extension encoder for encoding an audio signal has a signal analyzer, a core encoder, a parameter calculator, and a window controller. The audio signal has a low frequency signal having a core frequency band and a high frequency signal having an upper frequency band. The signal analyzer is configured for analyzing the audio signal, the audio signal having a block of audio samples, the block having a specified length in time. The signal analyzer is furthermore configured for determining from a plurality of analysis windows an analysis window to be used for performing a bandwidth extension in a bandwidth extension decoder. The core encoder is configured for encoding the low frequency signal to acquire an encoded or frequency signal. The parameter calculator is configured for calculating bandwidth extension parameters from the high frequency signal. The window controller is configured to provide control information indicating analysis window functions.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: December 10, 2013
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Frederik Nagel, Markus Multrus, Sascha Disch, Jeremie Lecomte, Christian Ertel, Patrick Warmbold
  • Patent number: 8321207
    Abstract: For postprocessing spectral values which are based on a first transformation algorithm for converting the audio signal into a spectral representation, first a sequence of blocks of the spectral values representing a sequence of blocks of samples of the audio signal are provided.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: November 27, 2012
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Bernd Edler, Ralf Geiger, Christian Ertel, Johannes Hilpert, Harald Popp
  • Publication number: 20120158409
    Abstract: A bandwidth extension encoder for encoding an audio signal has a signal analyzer, a core encoder and a parameter calculator. The audio signal has a low frequency signal having a core frequency band and a high frequency signal having an upper frequency band. The signal analyzer is configured for analyzing the audio signal, the audio signal having a block of audio samples, the block having a specified length in time. The signal analyzer is furthermore configured for determining from a plurality of analysis windows an analysis window to be used for performing a bandwidth extension in a bandwidth extension decoder. The core encoder is configured for encoding the low frequency signal to acquire an encoded or frequency signal. The parameter calculator is configured for calculating bandwidth extension parameters from the high frequency signal.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 21, 2012
    Inventors: Frederik Nagel, Markus Multrus, Sascha Disch, Jeremie Lecomte, Christian Ertel, Patrick Warmbold
  • Publication number: 20100017213
    Abstract: For postprocessing spectral values which are based on a first transformation algorithm for converting the audio signal into a spectral representation, first a sequence of blocks of the spectral values representing a sequence of blocks of samples of the audio signal are provided.
    Type: Application
    Filed: September 28, 2007
    Publication date: January 21, 2010
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Bernd Edler, Ralf Geiger, Christian Ertel, Johannes Hilpert, Harald Popp