Patents by Inventor Machiel Willem Van Loon
Machiel Willem Van Loon 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: 9992599Abstract: Method for processing a stereo signal includes encoding an N-channel audio signal in a stereo signal (Lo, Ro) and spatial parameters (wl, wr), processing the stereo signal using the spatial parameters for generating a processed stereo signal (low, Row). The matrix of the processed stereo signal is described as the matrix of the stereo signal, multiplied by a filter matrix (H) having element that are filter functions (H1, H2, H3, H4) operated with spatial parameters (wl, wr) and a constant (a). The filter functions are time invariant and selected so that the matrix is invertible.Type: GrantFiled: March 30, 2005Date of Patent: June 5, 2018Assignee: Koninklijke Philips N.V.Inventors: Machiel Willem Van Loon, Gerard Herman Hotho, Dirk Jeroen Breebaart
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Patent number: 8520871Abstract: A device for processing parameters representing Head-Related Transfer Functions includes an input stage configured to receive audio signals of sound sources, a determinor configured to receive reference parameters representing Head-Related Transfer Functions and configured to determine, from the audio signals, position information representing positions and/or directions of the sound sources. A processor is configured to process the audio signals; and an influencer is configured to influence the processing of the audio signals based on the position information yielding an influenced output audio signal.Type: GrantFiled: July 11, 2012Date of Patent: August 27, 2013Assignee: Koninklijke Philips N.V.Inventors: Jeroen Dirk Breebaart, Michel Machiel Willem Van Loon
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Publication number: 20120275606Abstract: A method of generating parameters representing Head-Related Transfer Functions, the method comprising the steps of a) sampling with a sample length (n) a first time-domain HRTF impulse response signal using a sampling rate (fs) yielding a first time-discrete signal, b) transforming the first time-discrete signal to the frequency domain yielding a first frequency-domain signal, c) splitting the first frequency-domain signal into sub-bands, and d) generating a first parameter of the sub-bands based on a statistical measure of values of the sub-bands.Type: ApplicationFiled: July 11, 2012Publication date: November 1, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: JEROEN DIRK BREEBAART, MICHEL MACHIEL WILLEM VAN LOON
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Patent number: 8243969Abstract: A method of generating parameters representing Head-Related Transfer Functions, the method comprising the steps of a) sampling with a sample length (n) a first time-domain HRTF impulse response signal using a sampling rate (fs) yielding a first time-discrete signal, b) transforming the first time-discrete signal to the frequency domain yielding a first frequency-domain signal, c) splitting the first frequency-domain signal into sub-bands, and d) generating a first parameter of the sub-bands based on a statistical measure of values of the sub-bands.Type: GrantFiled: September 6, 2006Date of Patent: August 14, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Dirk Breebaart, Michel Machiel Willem Van Loon
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Patent number: 8150042Abstract: Techniques are described for combining parametric multi-channel audio coding with matrixing, reconstructing a full-quality multi-channel, independent of the decoder. A stereo signal is obtained from encoding an N-channel audio signal into spatial parameters and a stereo down-mix signal having first and second stereo signals, including adding a first signal and a third signal to obtain a first output signal, the first signal having the first stereo signal modified by a first complex function, the third signal having the second stereo signal modified by a third complex function. A second signal and fourth signal are similarly added to obtain a second output signal. Complex functions are chosen such that an energy value of the difference between first signal and the second signals (fourth signal and third signals) is larger than or equal to the energy value of the sum of the first and the second signal (fourth signal and third signal).Type: GrantFiled: July 7, 2005Date of Patent: April 3, 2012Assignees: Koninklijke Philips Electronics N.V., Coding Technologies ABInventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart, Gerard Herman Hotho, Erik Gosuinus Petrus Schuijers, Heiko Purnhagen, Karl Jonas Roden
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Patent number: 8144879Abstract: A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (LO, RO). A first signal and a third signal are added in order to obtain a first output signal (L0w), wherein the first signal (L0wL) comprises the first stereo signal (LO) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (RO) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (RO) modified by a fourth complex function (g4), and the second signal (R0wL) comprises the first stereo signal (LO) modified by a second complex function (g2).Type: GrantFiled: September 15, 2010Date of Patent: March 27, 2012Assignees: Koninklijke Philips Electronics N.V., Coding Technologies ABInventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart, Gerard Herman Hotho, Erik Gosuinus Petrus Schuijers, Heiko Purnhagen, Karl Jonas Roeden
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Patent number: 8135136Abstract: A device (10) for enhancing a multi-channel (e.g. stereo) audio signal has a parameter adjustment unit (13) for adjusting an original parameter (?, ILD, ICC) which represents an original inter-channel property of the audio signal. The device further comprises a processing unit (11) for processing the audio signal so as to produce an enhanced audio signal having the adjusted parameter (??, ILD?, ICC?). The device allows stereo widening or other multi-channel signal enhancements without introducing artifacts.Type: GrantFiled: August 30, 2005Date of Patent: March 13, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart
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Publication number: 20110058679Abstract: A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L0, R0). A first signal and a third signal are added in order to obtain a first output signal (Low), wherein the first signal (L0wL) comprises the first stereo signal (L0) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (R0) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (R0) modified by a fourth complex function (g4), and the second signal (R0wL) comprises the first stereo signal (L0) modified by a second complex function (g2).Type: ApplicationFiled: September 15, 2010Publication date: March 10, 2011Inventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart, Gerard Herman Hotho, Erik Gosuinus Petrus Schuijers, Heiko Purnhagen, Karl Jonas Roeden
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Publication number: 20090034744Abstract: A device (10) for enhancing a multi-channel (e.g. stereo) audio signal has a parameter adjustment unit (13) for adjusting an original parameter (?, ILD, ICC) which represents an original inter-channel property of the audio signal. The device further comprises a processing unit (11) for processing the audio signal so as to produce an enhanced audio signal having the adjusted parameter (??, ILD?, ICC?). The device allows stereo widening or other multi-channel signal enhancements without introducing artifacts.Type: ApplicationFiled: August 30, 2005Publication date: February 5, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Machiel Willem Van Loon, Dirk Jeroen Breebaart
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Publication number: 20080253578Abstract: A method of generating parameters representing Head-Related Transfer Functions, the method comprising the steps of a) sampling with a sample length (n) a first time-domain HRTF impulse response signal using a sampling rate (fs) yielding a first time-discrete signal, b) transforming the first time-discrete signal to the frequency domain yielding a first frequency-domain signal, c) splitting the first frequency-domain signal into sub-bands, and d) generating a first parameter of the sub-bands based on a statistical measure of values of the sub-bands.Type: ApplicationFiled: September 6, 2006Publication date: October 16, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Jeroen Dirk Breebaart, Michel Machiel Willem Van Loon