Patents by Inventor Maria Luis-Valero
Maria Luis-Valero 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).
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Publication number: 20240127837Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: ApplicationFiled: December 21, 2023Publication date: April 18, 2024Inventors: Maria Luis VALERO, Christian HELMRICH, Johannes HILPERT
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Patent number: 11887611Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: GrantFiled: December 27, 2022Date of Patent: January 30, 2024Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Maria Luis Valero, Christian Helmrich, Johannes Hilpert
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Publication number: 20230328183Abstract: An apparatus for conducting acoustic echo cancellation by generating one or more error signals is provided. The apparatus is to generate a first echo estimate including one or more first echo estimation signals by filtering one or more reference signals using a first filter configuration, wherein the one or more reference signals correspond to one or more loudspeaker signals or are derived from the one or more loudspeaker signals. Moreover, the apparatus is to generate a second echo estimate including one or more second echo estimation signals by filtering the one or more first echo estimation signals using a second filter configuration; or, the apparatus is to generate the second echo estimate including the one or more second echo estimation signals by generating an intermediate signal from the one or more first estimation signals, and by filtering the intermediate signal using the second filter configuration.Type: ApplicationFiled: June 14, 2023Publication date: October 12, 2023Inventors: Edwin MABANDE, Maria LUIS VALERO, Emanuel HABETS, Guendalina MILANO, Pilakeezhu DEEPTH
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Publication number: 20230132885Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: ApplicationFiled: December 27, 2022Publication date: May 4, 2023Inventors: Maria Luis VALERO, Christian HELMRICH, Johannes HILPERT
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Patent number: 11594235Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: GrantFiled: March 30, 2021Date of Patent: February 28, 2023Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Maria Luis Valero, Christian Helmrich, Johannes Hilpert
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Publication number: 20220148559Abstract: An acoustic echo cancellation unit includes: an audio processor configured to receive a multichannel audio signal and including: a first stage which is configured to process the multichannel audio signal to obtain a first set of spatial audio components; and a second stage which is configured to process the first set of spatial audio components to obtain a second set of spatial audio components; an echo cancellation processor configured to perform echo cancellation by use of the first set of spatial audio components or a deviated version of the first set of spatial audio components as reference signal.Type: ApplicationFiled: January 21, 2022Publication date: May 12, 2022Inventors: Moritz WILD, Emanuel HABETS, Edwin MABANDE, Guendalina MILANO, Maria LUIS VALERO, Philipp GOETZ, Andreas WALTHER, Fabian KUECH
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Publication number: 20210358508Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: ApplicationFiled: March 30, 2021Publication date: November 18, 2021Inventors: Maria Luis VALERO, Christian HELMRICH, Johannes HILPERT
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Patent number: 11031022Abstract: Noise filling of a spectrum of an audio signal is improved in quality with respect to the noise filled spectrum so that the reproduction of the noise filled audio signal is less annoying, by performing the noise filling in a manner dependent on a tonality of the audio signal.Type: GrantFiled: July 26, 2019Date of Patent: June 8, 2021Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Sascha Disch, Marc Gayer, Christian Helmrich, Goran Markovic, Maria Luis Valero
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Patent number: 10978084Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: GrantFiled: October 7, 2019Date of Patent: April 13, 2021Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Maria Luis Valero, Christian Helmrich, Johannes Hilpert
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Publication number: 20200051577Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: ApplicationFiled: October 7, 2019Publication date: February 13, 2020Inventors: Maria Luis VALERO, Christian HELMRICH, Johannes HILPERT
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Publication number: 20200051581Abstract: An apparatus for multichannel interference cancellation in a received audio signal including two or more received audio channels to obtain a modified audio signal including two or more modified audio channels is provided. The apparatus includes a first filter unit being configured to generate a first estimation of a first interference signal depending on a reference signal. Moreover, the apparatus includes a first interference canceller being configured to generate a first modified audio channel of the two or more modified audio channels from a first received audio channel of the two or more received audio channels depending on the first estimation of the first interference signal. Furthermore, the apparatus includes a second filter unit being configured to generate a second estimation of a second interference signal depending on the first estimation of the first interference signal.Type: ApplicationFiled: October 21, 2019Publication date: February 13, 2020Inventors: Maria LUIS VALERO, Emanuel HABETS, Paolo ANNIBALE, Anthony LOMBARD, Moritz WILD, Marcel RUTHA
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Publication number: 20190348053Abstract: Noise filling of a spectrum of an audio signal is improved in quality with respect to the noise filled spectrum so that the reproduction of the noise filled audio signal is less annoying, by performing the noise filling in a manner dependent on a tonality of the audio signal.Type: ApplicationFiled: July 26, 2019Publication date: November 14, 2019Inventors: Sascha DISCH, Marc GAYER, Christian HELMRICH, Goran MARKOVIC, Maria LUIS VALERO
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Patent number: 10468042Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: GrantFiled: February 15, 2019Date of Patent: November 5, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Maria Luis Valero, Christian Helmrich, Johannes Hilpert
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Patent number: 10454454Abstract: A partitioned block frequency domain adaptive filter device includes a frequency domain adaptive filter configured for filtering a frequency domain representation of a time domain input signal depending on a set of filter coefficients consisting of a plurality of blocks of filter coefficients in order to produce a filtered signal; a plurality of parallel arranged filter update blocks; wherein each of the filter update blocks includes an adaptation module configured for executing an adaptation sequence including the steps of calculating an approximation of a constrained gradient update for the filter coefficients of the respective block of filter coefficients, and calculating a cumulative error introduced on the unconstrained gradient update; wherein each of the filter update blocks includes a correction module configured for executing a correction sequence including the steps of calculating a corrected constrained gradient update for the filter coefficients of the respective block of filter coefficients.Type: GrantFiled: January 23, 2018Date of Patent: October 22, 2019Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Maria Luis Valero, Emanuel Habets, Edwin Mabande, Anthony Lombard, Dirk Mahne, Bernhard Birzer
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Patent number: 10410642Abstract: Noise filling of a spectrum of an audio signal is improved in quality with respect to the noise filled spectrum so that the reproduction of the noise filled audio signal is less annoying, by performing the noise filling in a manner dependent on a tonality of the audio signal.Type: GrantFiled: September 7, 2017Date of Patent: September 10, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Sascha Disch, Marc Gayer, Christian Helmrich, Goran Markovic, Maria Luis Valero
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Publication number: 20190180762Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: ApplicationFiled: February 15, 2019Publication date: June 13, 2019Inventors: Maria Luis VALERO, Christian HELMRICH, Johannes HILPERT
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Patent number: 10255924Abstract: In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.Type: GrantFiled: January 20, 2016Date of Patent: April 9, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Maria Luis Valero, Christian Helmrich, Johannes Hilpert
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Publication number: 20180226954Abstract: A partitioned block frequency domain adaptive filter device includes a frequency domain adaptive filter configured for filtering a frequency domain representation of a time domain input signal depending on a set of filter coefficients consisting of a plurality of blocks of filter coefficients in order to produce a filtered signal; a plurality of parallel arranged filter update blocks; wherein each of the filter update blocks includes an adaptation module configured for executing an adaptation sequence including the steps of calculating an approximation of a constrained gradient update for the filter coefficients of the respective block of filter coefficients, and calculating a cumulative error introduced on the unconstrained gradient update; wherein each of the filter update blocks includes a correction module configured for executing a correction sequence including the steps of calculating a corrected constrained gradient update for the filter coefficients of the respective block of filter coefficients.Type: ApplicationFiled: January 23, 2018Publication date: August 9, 2018Inventors: Maria Luis Valero, Emanuel Habets, Edwin Mabande, Anthony Lombard, Dirk Mahne, Bernhard Birzer
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Publication number: 20170372712Abstract: Noise filling of a spectrum of an audio signal is improved in quality with respect to the noise filled spectrum so that the reproduction of the noise filled audio signal is less annoying, by performing the noise filling in a manner dependent on a tonality of the audio signal.Type: ApplicationFiled: September 7, 2017Publication date: December 28, 2017Inventors: Sascha DISCH, Marc GAYER, Christian HELMRICH, Goran MARKOVIC, Maria LUIS VALERO
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Patent number: 9792920Abstract: Noise filling of a spectrum of an audio signal is improved in quality with respect to the noise filled spectrum so that the reproduction of the noise filled audio signal is less annoying, by performing the noise filling in a manner dependent on a tonality of the audio signal.Type: GrantFiled: July 29, 2015Date of Patent: October 17, 2017Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Sascha Disch, Marc Gayer, Christian Helmrich, Goran Markovic, Maria Luis Valero