Patents by Inventor Michael KRATSCHMER
Michael KRATSCHMER 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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Patent number: 10249311Abstract: 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: GrantFiled: January 20, 2016Date of Patent: April 2, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.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
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Publication number: 20190075419Abstract: An apparatus for mapping a first input channel and a second input channel of an input channel configuration to at least one output channel of an output channel configuration, wherein each input channel and each output channel has a direction in which an associated loudspeaker is located relative to a central listener position, configured to map the first input channel to a first output channel of the output channel configuration; and despite of the fact that an angle deviation between a direction of the second input channel and a direction of the first output channel is less than an angle deviation between a direction of the second input channel and the second output channel and/or is less than an angle deviation between the direction of the second input channel and the direction of the third output channel, map the second input channel to the second and third output channels by panning between the second and third output channels.Type: ApplicationFiled: November 1, 2018Publication date: March 7, 2019Inventors: Juergen HERRE, Fabian KUECH, Michael KRATSCHMER, Achim KUNTZ, Christoph FALLER
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Patent number: 10154362Abstract: An apparatus for mapping a first input channel and a second input channel of an input channel configuration to at least one output channel of an output channel configuration, wherein each input channel and each output channel has a direction in which an associated loudspeaker is located relative to a central listener position, configured to map the first input channel to a first output channel of the output channel configuration; and despite of the fact that an angle deviation between a direction of the second input channel and a direction of the first output channel is less than an angle deviation between a direction of the second input channel and the second output channel and/or is less than an angle deviation between the direction of the second input channel and the direction of the third output channel, map the second input channel to the second and third output channels by panning between the second and third output channels.Type: GrantFiled: January 20, 2016Date of Patent: December 11, 2018Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Juergen Herre, Fabian Kuech, Michael Kratschmer, Achim Kuntz, Christoph Faller
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Patent number: 10085104Abstract: 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 controType: GrantFiled: January 22, 2016Date of Patent: September 25, 2018Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Christian Ertel, Johannes Hilpert, Andreas Hoelzer, Achim Kuntz, Jan Plogsties, Michael Kratschmer
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Patent number: 10074377Abstract: An audio encoder device includes an audio encoder configured for producing an encoded audio bitstream from an audio signal having consecutive audio frames; a dynamic range control encoder configured for producing an encoded dynamic range control bitstream from an dynamic range control sequence corresponding to the audio signal and having consecutive dynamic range control frames, wherein each dynamic range control frame of the dynamic range control frames has one or more nodes, wherein each node of the one or more nodes has gain information for the audio signal and time information indicating to which point in time the gain information corresponds.Type: GrantFiled: September 22, 2016Date of Patent: September 11, 2018Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Fabian Kuech, Christian Uhle, Michael Kratschmer, Bernhard Neugebauer, Michael Meier, Stephan Schreiner
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Publication number: 20180192225Abstract: A method for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration includes providing a set of rules associated with each input channel of the plurality of input channels, wherein the rules define different mappings between the associated input channel and a set of output channels. For each input channel of the plurality of input channels, a rule associated with the input channel is accessed, determination is made whether the set of output channels defined in the accessed rule is present in the output channel configuration, and the accessed rule is selected if the set of output channels defined in the accessed rule is present in the output channel configuration. The input channels are mapped to the output channels according to the selected rule.Type: ApplicationFiled: March 2, 2018Publication date: July 5, 2018Inventors: Juergen HERRE, Fabian KUECH, Michael KRATSCHMER, Achim KUNTZ, Christoph FALLER
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Publication number: 20180143799Abstract: An audio processor for processing an audio signal includes: an audio signal modifier for modifying the audio signal in response to a user input; a loudness controller for determining a loudness compensation gain based on a reference loudness or a reference gain and a modified loudness or a modified gain, where the modified loudness or the modified gain depends on the user input; and a loudness manipulator for manipulating a loudness of a signal using the loudness compensation gain.Type: ApplicationFiled: December 14, 2017Publication date: May 24, 2018Inventors: Fabian KÜCH, Christian UHLE, Michael KRATSCHMER, Bernhard NEUGEBAUER, Michael MEIER
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Publication number: 20180124541Abstract: 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 controType: ApplicationFiled: December 27, 2017Publication date: May 3, 2018Inventors: Christian Ertel, Johannes Hilpert, Andreas Hoelzer, Achim Kuntz, Jan Plogsties, Michael Kratschmer
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Patent number: 9936327Abstract: A method for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration includes providing a set of rules associated with each input channel of the plurality of input channels, wherein the rules define different mappings between the associated input channel and a set of output channels. For each input channel of the plurality of input channels, a rule associated with the input channel is accessed, determination is made whether the set of output channels defined in the accessed rule is present in the output channel configuration, and the accessed rule is selected if the set of output channels defined in the accessed rule is present in the output channel configuration. The input channels are mapped to the output channels according to the selected rule.Type: GrantFiled: January 19, 2016Date of Patent: April 3, 2018Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Juergen Herre, Fabian Kuech, Michael Kratschmer, Achim Kuntz, Christoph Faller
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Publication number: 20170230693Abstract: Audio splicing is rendered more effective by the use of one or more truncation unit packets inserted into the audio data stream so as to indicate to an audio decoder, for a predetermined access unit, an end portion of an audio frame with which the predetermined access unit is associated, as to be discarded in playout.Type: ApplicationFiled: March 7, 2017Publication date: August 10, 2017Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Herbert Thoma, Robert Bleidt, Stefan Kraegeloh, Max Neuendorf, Achim Kuntz, Andreas Niedermeier, Michael Kratschmer
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Publication number: 20170011749Abstract: An audio encoder device includes an audio encoder configured for producing an encoded audio bitstream from an audio signal having consecutive audio frames; a dynamic range control encoder configured for producing an encoded dynamic range control bitstream from an dynamic range control sequence corresponding to the audio signal and having consecutive dynamic range control frames, wherein each dynamic range control frame of the dynamic range control frames has one or more nodes, wherein each node of the one or more nodes has gain information for the audio signal and time information indicating to which point in time the gain information corresponds.Type: ApplicationFiled: September 22, 2016Publication date: January 12, 2017Inventors: Fabian KUECH, Christian UHLE, Michael KRATSCHMER, Bernhard NEUGEBAUER, Michael MEIER, Stephan SCHREINER
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Publication number: 20160240204Abstract: The invention provides a concept for combined dynamic range compression and guided clipping prevention for audio devices. An audio decoder for decoding an audio bitstream and a metadata bitstream related to the audio bitstream according to the concept includes an audio processing chain including a plurality of adjustment stages including a dynamic range control stage for adjusting a dynamic range of the audio output signal and a guided clipping prevention stage for preventing clipping of the audio output signal; and a metadata decoder configured to receive the metadata bitstream and to extract dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream, at least a part of the dynamic range control gain sequences being supplied to the dynamic range control stage, and at least a part of the guided clipping prevention gain sequences being supplied to the guided clipping prevention stage.Type: ApplicationFiled: April 22, 2016Publication date: August 18, 2016Inventors: Fabian KUECH, Christian UHLE, Michael KRATSCHMER, Bernhard NEUGEBAUER, Michael MEIER, Arne BORSUM
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Patent number: 9396731Abstract: An apparatus for generating an audio output signal to simulate a recording of a virtual microphone at a configurable virtual position in an environment includes a sound events position estimator and an information computation module. The former is adapted to estimate a sound source position indicating a position of a sound source in the environment, wherein the sound events position estimator is adapted to estimate the sound source position based on first and second direction information provided by first and second real spatial microphones, respectively, located at first and second real microphone positions in the environment, respectively. The information computation module is adapted to generate the audio output signal based on a first recorded audio input signal, on the first real microphone position, on the virtual position of the virtual microphone, and on the sound source position.Type: GrantFiled: May 29, 2013Date of Patent: July 19, 2016Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Juergen Herre, Fabian Kuech, Markus Kallinger, Giovanni Del Galdo, Oliver Thiergart, Dirk Mahne, Achim Kuntz, Michael Kratschmer, Alexandra Craciun
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Publication number: 20160157040Abstract: 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 controType: ApplicationFiled: January 22, 2016Publication date: June 2, 2016Inventors: Christian ERTEL, Johannes HILPERT, Andreas HOELZER, Achim KUNTZ, Jan PLOGSTIES, Michael KRATSCHMER
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Publication number: 20160142853Abstract: An apparatus for mapping a first input channel and a second input channel of an input channel configuration to at least one output channel of an output channel configuration, wherein each input channel and each output channel has a direction in which an associated loudspeaker is located relative to a central listener position, configured to map the first input channel to a first output channel of the output channel configuration; and despite of the fact that an angle deviation between a direction of the second input channel and a direction of the first output channel is less than an angle deviation between a direction of the second input channel and the second output channel and/or is less than an angle deviation between the direction of the second input channel and the direction of the third output channel, map the second input channel to the second and third output channels by panning between the second and third output channels.Type: ApplicationFiled: January 20, 2016Publication date: May 19, 2016Inventors: Juergen HERRE, Fabian KUECH, Michael KRATSCHMER, Achim KUNTZ, Christoph FALLER
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Publication number: 20160133262Abstract: An audio signal processing decoder having at least one frequency band and being configured for processing an input audio signal having a plurality of input channels in the at least one frequency band, wherein the decoder is configured to analyze the input audio signal, wherein inter-channel dependencies between the input channels are identified; and to align the phases of the input channels based on the identified inter-channel dependencies, wherein the phases of input channels are the more aligned with respect to each other the higher their inter-channel dependency is; and to downmix the aligned input audio signal to an output audio signal having a lesser number of output channels than the number of the input channels.Type: ApplicationFiled: January 19, 2016Publication date: May 12, 2016Inventors: Simone FUEG, Achim KUNTZ, Michael KRATSCHMER, Juha VILKAMO
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Publication number: 20160134989Abstract: A method for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration includes providing a set of rules associated with each input channel of the plurality of input channels, wherein the rules define different mappings between the associated input channel and a set of output channels. For each input channel of the plurality of input channels, a rule associated with the input channel is accessed, determination is made whether the set of output channels defined in the accessed rule is present in the output channel configuration, and the accessed rule is selected if the set of output channels defined in the accessed rule is present in the output channel configuration. The input channels are mapped to the output channels according to the selected rule.Type: ApplicationFiled: January 19, 2016Publication date: May 12, 2016Inventors: Juergen Herre, Fabian Kuech, Michael Kratschmer, Achim Kuntz, Christoph Faller
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Publication number: 20160133267Abstract: 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: ApplicationFiled: January 20, 2016Publication date: May 12, 2016Inventors: 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
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Publication number: 20130259243Abstract: An apparatus for generating an audio output signal to simulate a recording of a virtual microphone at a configurable virtual position in an environment includes a sound events position estimator and an information computation module. The former is adapted to estimate a sound source position indicating a position of a sound source in the environment, wherein the sound events position estimator is adapted to estimate the sound source position based on first and second direction information provided by first and second real spatial microphones, respectively, located at first and second real microphone positions in the environment, respectively. The information computation module is adapted to generate the audio output signal based on a first recorded audio input signal, on the first real microphone position, on the virtual position of the virtual microphone, and on the sound source position.Type: ApplicationFiled: May 29, 2013Publication date: October 3, 2013Inventors: Juergen HERRE, Fabian KUECH, Markus KALLINGER, Giovanni DEL GALDO, Oliver THIERGART, Dirk MAHNE, Achim KUNTZ, Michael KRATSCHMER, Alexandra CRACIUN