Patents by Inventor Vilhjalmur S Thorvaldsson
Vilhjalmur S Thorvaldsson 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: 10103694Abstract: An audio driver equipped with a distortion compensation unit corrects for detected distortion and includes a digital to analog converter (DAC), an amplifier, and an output driver that drives a loudspeaker. Between the output driver and the loudspeaker, the audio driver can include a series resistor and a differential amplifier to measure the voltage across the resistor. A distortion detection unit can use the detected voltage to determine whether distortion, such as rub and buzz distortion is present. The distortion detection unit can comprise an analog to digital converter (ADC) to digitize the voltage data, an FFT to transform the voltage data into frequency information, a root-mean-square (RMS) module that measures the energy at each frequency, and an analysis module which looks for the distortion signature in the energy spectrum.Type: GrantFiled: September 1, 2015Date of Patent: October 16, 2018Assignee: SYNAPTICS INCORPORATEDInventors: Trausti Thormundsson, Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, James Walter Wihardja
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Patent number: 9407992Abstract: A method for continuously estimating reverberation decay comprising receiving a sequence of audio data samples. Determining whether a plateau is present in the sequence of audio data samples. Generating one or more reverberation parameters from the sequence of audio data samples if it is determined that the plateau is present.Type: GrantFiled: December 13, 2013Date of Patent: August 2, 2016Assignee: CONEXANT SYSTEMS, INC.Inventors: Chris X. Gao, Govind Kannan, Youhong Lu, Trausti Thormundsson, Vilhjalmur S. Thorvaldsson
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Publication number: 20150372650Abstract: An audio driver equipped with a distortion compensation unit corrects for detected distortion and includes a digital to analog converter (DAC), an amplifier, and an output driver that drives a loudspeaker. Between the output driver and the loudspeaker, the audio driver can include a series resistor and a differential amplifier to measure the voltage across the resistor. A distortion detection unit can use the detected voltage to determine whether distortion, such as rub and buzz distortion is present. The distortion detection unit can comprise an analog to digital converter (ADC) to digitize the voltage data, an FFT to transform the voltage data into frequency information, a root-mean-square (RMS) module that measures the energy at each frequency, and an analysis module which looks for the distortion signature in the energy spectrum.Type: ApplicationFiled: September 1, 2015Publication date: December 24, 2015Inventors: Trausti Thormundsson, Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, James Walter Wihardja
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Patent number: 9124219Abstract: An audio driver comprising a distortion detection unit coupled between an amplifier and a loudspeaker and configured to detect a distortion signal generated by the loudspeaker while the loudspeaker is being used to deliver an audio signal from the amplifier. A distortion compensation unit configured to compensate for the distortion signal without interfering with the audio signal.Type: GrantFiled: June 22, 2011Date of Patent: September 1, 2015Assignee: Conexant Systems, Inc.Inventors: Trausti Thormundsson, Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, James Walter Wihardja
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Patent number: 9081657Abstract: An apparatus for abstract memory addressing. A processor for generating an abstract memory address. A base register for storing a base memory address. An adder for adding the base memory address to the abstract memory address and generating a physical address for a device memory. A pointer register for storing the physical address, wherein the pointer register is directly coupled to the device memory.Type: GrantFiled: October 13, 2011Date of Patent: July 14, 2015Assignee: CONEXANT SYSTEMS, INC.Inventors: Vilhjalmur S. Thorvaldsson, Sveinn V. Grimsson, Ragnar H. Jonsson, Trausti Thormundsson, Sverrir Olafsson
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Patent number: 8872678Abstract: Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.Type: GrantFiled: July 18, 2012Date of Patent: October 28, 2014Assignee: Conexant Systems, Inc.Inventors: Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, Trausti Thormundsson
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Publication number: 20140169575Abstract: A method for continuously estimating reverberation decay comprising receiving a sequence of audio data samples. Determining whether a plateau is present in the sequence of audio data samples. Generating one or more reverberation parameters from the sequence of audio data samples if it is determined that the plateau is present.Type: ApplicationFiled: December 13, 2013Publication date: June 19, 2014Applicant: Conexant Systems, Inc.Inventors: Chris X. Gao, Govind Kannan, Youhong Lu, Trausti Thormundsson, Vilhjalmur S. Thorvaldsson
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Publication number: 20130097405Abstract: An apparatus for abstract memory addressing. A processor for generating an abstract memory address. A base register for storing a base memory address. An adder for adding the base memory address to the abstract memory address and generating a physical address for a device memory. A pointer register for storing the physical address, wherein the pointer register is directly coupled to the device memory.Type: ApplicationFiled: October 13, 2011Publication date: April 18, 2013Inventors: Vilhjalmur S. Thorvaldsson, Sveinn V. Grimsson, Ragnar H. Jonsson, Trausti Thormundsson, Sverrir Olafsson
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Publication number: 20130038475Abstract: Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.Type: ApplicationFiled: July 18, 2012Publication date: February 14, 2013Applicant: Conexant Systems, Inc.Inventors: Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, Trausti Thormundsson
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Patent number: 8253610Abstract: Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.Type: GrantFiled: February 17, 2011Date of Patent: August 28, 2012Assignee: Conexant Systems, Inc.Inventors: Ragnar H Jonsson, Vilhjalmur S Thorvaldsson, Trausti Thormundsson
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Publication number: 20120002819Abstract: A grounding switch is described which operates properly even in the presence of negative voltages on a signal line. The grounding switch uses isolated field effect transistors that have their substrates tied to different voltages. The isolated field effect transistor has gate voltage and substrate voltage which can be pulled down to negative voltage when the signal line has a negative voltage allowing the switch to remain open even with a negative voltage.Type: ApplicationFiled: June 22, 2011Publication date: January 5, 2012Inventors: Trausti Thormundsson, Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, James Walter Wihardja
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Publication number: 20110254711Abstract: Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.Type: ApplicationFiled: February 17, 2011Publication date: October 20, 2011Applicant: CONEXANT SYSTEMS, INC.Inventors: Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, Trausti Thormundsson
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Patent number: 7920078Abstract: Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.Type: GrantFiled: June 19, 2009Date of Patent: April 5, 2011Assignee: Conexant Systems, Inc.Inventors: Ragnar H Jonsson, Vilhjalmur S Thorvaldsson, Trausti Thormundsson
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Publication number: 20100321216Abstract: Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.Type: ApplicationFiled: June 19, 2009Publication date: December 23, 2010Applicant: CONEXANT SYSTEMS, INC.Inventors: Ragnar H. Jonsson, Vilhjalmur S. Thorvaldsson, Trausti Thormundsson