Patents by Inventor Stefan Wabnik
Stefan Wabnik 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: 20240096337Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: ApplicationFiled: November 29, 2023Publication date: March 21, 2024Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Nikolaus RETTELBACH, Bernhard GRILL, Guillaume FUCHS, Stefan GEYERSBERGER, Markus MULTRUS, Harald POPP, Juergen HERRE, Stefan WABNIK, Gerald SCHULLER, Jens HIRSCHFELD
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Publication number: 20240096338Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: ApplicationFiled: November 29, 2023Publication date: March 21, 2024Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Nikolaus RETTELBACH, Bernhard GRILL, Guillaume FUCHS, Stefan GEYERSBERGER, Markus MULTRUS, Harald POPP, Juergen HERRE, Stefan WABNIK, Gerald SCHULLER, Jens HIRSCHFELD
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Patent number: 11869521Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: GrantFiled: May 17, 2021Date of Patent: January 9, 2024Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Nikolaus Rettelbach, Bernhard Grill, Guillaume Fuchs, Stefan Geyersberger, Markus Multrus, Harald Popp, Juergen Herre, Stefan Wabnik, Gerald Schuller, Jens Hirschfeld
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Publication number: 20210272577Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: ApplicationFiled: May 17, 2021Publication date: September 2, 2021Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Nikolaus RETTELBACH, Bernhard GRILL, Guillaume FUCHS, Stefan GEYERSBERGER, Markus MULTRUS, Harald POPP, Juergen HERRE, Stefan WABNIK, Gerald SCHULLER, Jens HIRSCHFELD
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Patent number: 11024323Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: GrantFiled: July 7, 2017Date of Patent: June 1, 2021Assignee: Fraunhofer-Gesellschaft zur Fcerderung der angewandten Forschung e.V.Inventors: Nikolaus Rettelbach, Bernhard Grill, Guillaume Fuchs, Stefan Geyersberger, Markus Multrus, Harald Popp, Juergen Herre, Stefan Wabnik, Gerald Schuller, Jens Hirschfeld
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Patent number: 10629215Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: GrantFiled: September 15, 2016Date of Patent: April 21, 2020Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Nikolaus Rettelbach, Bernhard Grill, Guillaume Fuchs, Stefan Geyersberger, Markus Multrus, Harald Popp, Juergen Herre, Stefan Wabnik, Gerald Schuller, Jens Hirschfeld
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Patent number: 10522168Abstract: An audio signal synthesizer generates a synthesis audio signal having a first frequency band and a second synthesized frequency band derived from the first frequency band and comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, each patching algorithm generating a raw signal. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information. The spectral converter converts the raw signal into a raw signal spectral representation. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation.Type: GrantFiled: June 6, 2018Date of Patent: December 31, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Frederik Nagel, Sascha Disch, Nikolaus Rettelbach, Max Neuendorf, Bernhard Grill, Ulrich Kraemer, Stefan Wabnik
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Patent number: 10446162Abstract: A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.Type: GrantFiled: July 26, 2017Date of Patent: October 15, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Jens Hirschfeld, Gerald Schuller, Manfred Lutzky, Ulrich Kraemer, Stefan Wabnik
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Publication number: 20180350387Abstract: An audio signal synthesizer generates a synthesis audio signal having a first frequency band and a second synthesized frequency band derived from the first frequency band and comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, each patching algorithm generating a raw signal. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information. The spectral converter converts the raw signal into a raw signal spectral representation. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation.Type: ApplicationFiled: June 6, 2018Publication date: December 6, 2018Inventors: Frederik NAGEL, Sascha DISCH, Nikolaus RETTELBACH, Max NEUENDORF, Bernhard GRILL, Ulrich KRAEMER, Stefan WABNIK
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Patent number: 10014000Abstract: An audio signal synthesizer generates a synthesis audio signal having a first frequency band and a second synthesized frequency band derived from the first frequency band and comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, each patching algorithm generating a raw signal. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information. The spectral converter converts the raw signal into a raw signal spectral representation. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation.Type: GrantFiled: April 10, 2014Date of Patent: July 3, 2018Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Frederik Nagel, Sascha Disch, Nikolaus Rettelbach, Max Neuendorf, Bernhard Grill, Ulrich Kraemer, Stefan Wabnik
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Publication number: 20180012608Abstract: A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.Type: ApplicationFiled: July 26, 2017Publication date: January 11, 2018Inventors: Jens HIRSCHFELD, Gerald Schuller, Manfred Lutzky, Ulrich Kraemer, Stefan WABNIK
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Publication number: 20170309283Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: ApplicationFiled: July 7, 2017Publication date: October 26, 2017Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Nikolaus RETTELBACH, Bernhard GRILL, Guillaume FUCHS, Stefan GEYERSBERGER, Markus MULTRUS, Harald POPP, Juergen HERRE, Stefan WABNIK, Gerald SCHULLER, Jens HIRSCHFELD
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Patent number: 9754601Abstract: A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.Type: GrantFiled: February 28, 2007Date of Patent: September 5, 2017Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Jens Hirschfeld, Gerald Schuller, Manfred Lutzky, Ulrich Kraemer, Stefan Wabnik
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Patent number: 9711157Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: GrantFiled: December 24, 2014Date of Patent: July 18, 2017Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Nikolaus Rettelbach, Bernhard Grill, Guillaume Fuchs, Stefan Geyersberger, Markus Multrus, Harald Popp, Juergen Herre, Stefan Wabnik, Gerald Schuller, Jens Hirschfeld
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Patent number: 9659566Abstract: For generating a signal to be transmitted original information is encoded into a main channel and a side channel, wherein the side channel is more robust against channel influences than the main channel. On the receiver side, when the receive quality is above a threshold, which is necessitated to execute a successful decoding of the main channel, the main channel is reproduced. If the receive quality falls below this threshold, however, the side channel is reproduced which may have less bits than the main channel and which is a correspondingly lower quality representation of the original information than the main channel.Type: GrantFiled: May 27, 2015Date of Patent: May 23, 2017Assignee: FAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Gerald Schuller, Stefan Wabnik, Bernhard Grill, Alexander Zink
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Publication number: 20170004839Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: ApplicationFiled: September 15, 2016Publication date: January 5, 2017Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Nikolaus RETTELBACH, Bernhard GRILL, Guillaume FUCHS, Stefan GEYERSBERGER, Markus MULTRUS, Harald POPP, Juergen HERRE, Stefan WABNIK, Gerald SCHULLER, Jens HIRSCHFELD
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Patent number: 9449606Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.Type: GrantFiled: January 16, 2014Date of Patent: September 20, 2016Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Nikolaus Rettelbach, Bernhard Grill, Guillaume Fuchs, Stefan Geyersberger, Markus Multrus, Harald Popp, Juergen Herre, Stefan Wabnik, Gerald Schuller, Jens Hirschfeld
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Patent number: 9350700Abstract: A watermark generator for providing a watermark signal in dependence on binary message data includes an information processor configured to provide, in dependence on information units of the binary message data, a first time-frequency domain representation, values of which represent the binary message data. The watermark generator also includes a differential encoder configured to derive a second time-frequency domain representation from the first time-frequency-domain representation, such that the second time-frequency-domain representation includes a plurality of values, wherein a difference between two values of the second time-frequency-domain representation represents a corresponding value of the first time-frequency-domain representation, in order to obtain a differential encoding of the values of the first time-frequency-domain representation.Type: GrantFiled: August 17, 2012Date of Patent: May 24, 2016Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Stefan Wabnik, Joerg Pickel, Bert Greevenbosch, Bernhard Grill, Ernst Eberlein, Giovanni Del Galdo, Stefan Kraegeloh, Reinhard Zitzmann, Tobias Bliem, Marco Breiling, Juliane Borsum
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Patent number: 9299356Abstract: A watermark decoder includes a time-frequency-domain representation provider, a memory unit, a synchronization determiner and a watermark extractor. The time-frequency-domain representation provider provides a frequency-domain representation of the watermarked signal for a plurality of time blocks. The memory unit stores the frequency-domain representation of the watermarked signal for a plurality of time blocks. Further, the synchronization determiner identifies an alignment time block based on the frequency-domain representation of the watermarked signal of a plurality of time blocks. The watermark extractor provides binary message data based on stored frequency-domain representations of the watermarked signal of time blocks temporally preceding the identified alignment time block considering a distance to the identified alignment time block.Type: GrantFiled: August 20, 2012Date of Patent: March 29, 2016Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Stefan Wabnik, Joerg Pickel, Bert Greevenbosch, Bernhard Grill, Ernst Eberlein, Giovanni Del Galdo, Stefan Kraegeloh, Reinhard Zitzmann, Tobias Bliem, Marco Breiling, Juliane Borsum
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Patent number: 9214159Abstract: A watermark signal provider comprises a time-frequency-domain waveform provider to provide time-domain waveforms for a plurality of frequency subbands. The time-frequency-domain waveform provider is configured to map a given value of a time-frequency-domain representation onto a bit shaping function, a temporal extension of which is longer than a bit interval, such that there is a temporal overlap between bit shaped functions provided for temporally subsequent values of the time-frequency-domain representation of the same frequency subband. A time-domain waveform of a given frequency subband contains a plurality of bit shaped functions provided for temporally subsequent values of the time-frequency-domain representation. The water mark signal provider further has a time-domain waveform combiner.Type: GrantFiled: August 24, 2012Date of Patent: December 15, 2015Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Reinhard Zitzmann, Stefan Wabnik, Joerg Pickel, Bert Greevenbosch, Bernhard Grill, Ernst Eberlein, Giovanni Del Galdo, Stefan Kraegeloh, Tobias Bliem, Juliane Borsum, Marco Breiling