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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Publication number: 20240129560Abstract: 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: December 26, 2023Publication date: April 18, 2024Inventors: Herbert THOMA, Robert BLEIDT, Stefan KRAEGELOH, Max NEUENDORF, Achim KUNTZ, Andreas NIEDERMEIER, Michael KRATSCHMER
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Patent number: 11882323Abstract: 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: GrantFiled: September 8, 2022Date of Patent: January 23, 2024Assignee: 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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Patent number: 11877141Abstract: 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: September 10, 2020Date of Patent: January 16, 2024Assignee: 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: 20230419984Abstract: An apparatus for providing an estimate of a loudness of signal components of interest of an audio signal is provided. The apparatus has an input interface configured to receive a plurality of samples of the audio signal. Moreover, the apparatus has a neural network configured to receive as input values the plurality of samples of the audio signal or a plurality of derived values being derived from the plurality of samples of the audio signal, and configured to determine at least one output value from the plurality of input values, such that the at least one output value indicates the estimate of the loudness of the signal components of interest of the audio signal.Type: ApplicationFiled: September 11, 2023Publication date: December 28, 2023Inventors: Christian UHLE, Michael KRATSCHMER, Alessandro TRAVAGLINI, Bernhard NEUGEBAUER
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Patent number: 11743668Abstract: 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: November 11, 2021Date of Patent: August 29, 2023Assignee: 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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Publication number: 20230134916Abstract: 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: December 29, 2022Publication date: May 4, 2023Inventors: Fabian KUECH, Christian UHLE, Michael KRATSCHMER, Bernhard NEUGEBAUER, Michael MEIER, Arne BORSUM
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Publication number: 20230074155Abstract: 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: September 8, 2022Publication date: March 9, 2023Inventors: Herbert THOMA, Robert BLEIDT, Stefan KRAEGELOH, Max NEUENDORF, Achim KUNTZ, Andreas NIEDERMEIER, Michael KRATSCHMER
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Patent number: 11551703Abstract: 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: GrantFiled: February 11, 2021Date of Patent: January 10, 2023Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Fabian Kuech, Christian Uhle, Michael Kratschmer, Bernhard Neugebauer, Michael Meier, Arne Borsum
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Patent number: 11477497Abstract: 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: GrantFiled: May 25, 2021Date of Patent: October 18, 2022Assignee: 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: 20220291896Abstract: 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: June 3, 2022Publication date: September 15, 2022Inventors: Fabian KÜCH, Christian UHLE, Michael KRATSCHMER, Bernhard NEUGEBAUER, Michael MEIER
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Publication number: 20220277756Abstract: 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: May 20, 2022Publication date: September 1, 2022Inventors: Fabian KUECH, Christian UHLE, Michael KRATSCHMER, Bernhard NEUGEBAUER, Michael MEIER, Stephan SCHREINER
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Patent number: 11379178Abstract: 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: GrantFiled: September 22, 2020Date of Patent: July 5, 2022Inventors: Fabian Küch, Christian Uhle, Michael Kratschmer, Bernhard Neugebauer, Michael Meier
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Publication number: 20220101867Abstract: 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: December 13, 2021Publication date: March 31, 2022Inventors: Alexander ADAMI, Christian BORSS, Sascha DICK, Christian ERTEL, Simone NEUKAM, Juergen HERRE, Johannes HILPERT, Andreas HOELZER, Michael KRATSCHMER, Fabian KUECH, Achim KUNTZ, Adrian MURTAZA, Jan PLOGSTIES, Andreas SILZLE, Hanne STENZEL
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Patent number: 11272309Abstract: 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: June 25, 2020Date of Patent: March 8, 2022Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Juergen Herre, Fabian Kuech, Michael Kratschmer, Achim Kuntz, Christof Faller
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Publication number: 20220070603Abstract: 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: November 11, 2021Publication date: March 3, 2022Inventors: Christian ERTEL, Johannes HILPERT, Andreas HOELZER, Achim KUNTZ, Jan PLOGSTIES, Michael KRATSCHMER
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Patent number: 11227616Abstract: 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: February 15, 2019Date of Patent: January 18, 2022Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Alexander Adami, Christian Borss, Sascha Dick, Christian Ertel, Simone Neukam, Juergen Herre, Johannes Hilpert, Andreas Hoelzer, Michael Kratschmer, Fabian Kuech, Achim Kuntz, Adrian Murtaza, Jan Plogsties, Andreas Silzle, Hanne Stenzel
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Patent number: 11184728Abstract: 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: May 24, 2019Date of Patent: November 23, 2021Assignee: 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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Publication number: 20210352342Abstract: 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: May 25, 2021Publication date: November 11, 2021Inventors: Herbert THOMA, Robert BLEIDT, Stefan KRAEGELOH, Max NEUENDORF, Achim KUNTZ, Andreas NIEDERMEIER, Michael KRATSCHMER
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Patent number: 11170795Abstract: 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: GrantFiled: April 22, 2016Date of Patent: November 9, 2021Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Fabian Kuech, Christian Uhle, Michael Kratschmer, Bernhard Neugebauer, Michael Meier, Arne Borsum
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Patent number: RE49107Abstract: 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 a 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: May 6, 2019Date of Patent: June 14, 2022Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.Inventors: Fabian Kuech, Christian Uhle, Michael Kratschmer, Bernhard Neugebauer, Michael Meier, Stephan Schreiner