Patents by Inventor Lars Bjorkman
Lars Bjorkman 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: 20240171702Abstract: Methods, systems, and computer program products for providing a second digital video stream. A first and a second primary digital video stream are collected from at least two different digital video sources. A first produced video stream is produced based on the first and second primary streams. A second stream is produced based on the first produced stream and also based on the first and second primary streams. The first and second primary streams are time-delayed so as to time-synchronise them with the first produced stream, taking into consideration a latency of the first produced stream. The second produced stream is produced based on the time-delayed first and second primary streams.Type: ApplicationFiled: January 31, 2024Publication date: May 23, 2024Inventors: Andreas BJÖRKMAN, Anders NILSSON, Lars ERLMAN
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Patent number: 8594210Abstract: Methods for positioning an FFT-window in an OFDM-receiver are disclosed as well as electronic apparatuses and computer program products for performing the methods. The method comprises determining a position of the FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal, using the position of the FFT-window to obtain a first OFDM-symbol from the received OFDM-signal, and applying an FFT to the first OFDM-symbol to produce an FFT-output signal. The method also comprises determining a frequency dependent phase rotation component of the FFT-output signal, and removing the determined frequency dependent phase rotation component from the FFT-output signal to obtain a compensated FFT-output signal. A delay spread estimate is calculated based on at least one of the FFT-output signal and the compensated FFT-output signal, and the position of the FFT-window is adjusted based on at least the determined frequency dependent phase rotation component and the calculated delay spread estimate.Type: GrantFiled: December 8, 2008Date of Patent: November 26, 2013Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Wilhelmsson, Lars Björkman, Fredrik Nordström
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Patent number: 8472538Abstract: Methods for calculating a delay spread estimate in an OFDM-receiver are described, along with computer program products and electronic apparatuses for performing the methods. The methods comprise determining a position of an FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal and using the determined position to obtain a first OFDM-symbol from the received OFDM-signal. An FFT is applied to the first OFDM-symbol to produce an FFT-output signal. A frequency dependent phase rotation component of the FFT-output signal is determined and removed from the FFT-output signal. A number of zero-crossings of at least one of a real component and an imaginary component of a transfer function of a channel, over which the received OFDM-signal has been transmitted, derived from the FFT-output signal where the frequency dependent phase rotation component has been removed is determined, and a delay spread estimate is calculated based on the determined number of zero-crossings.Type: GrantFiled: December 8, 2008Date of Patent: June 25, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Leif Wilhelmsson, Bo Bernhardsson, Lars Björkman
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Publication number: 20110019749Abstract: Methods for calculating a delay spread estimate in an OFDM-receiver are described, along with computer program products and electronic apparatuses for performing the methods. The methods comprise determining a position of an FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal and using the determined position to obtain a first OFDM-symbol from the received OFDM-signal. An FFT is applied to the first OFDM-symbol to produce an FFT-output signal. A frequency dependent phase rotation component of the FFT-output signal is determined and removed from the FFT-output signal. A number of zero-crossings of at least one of a real component and an imaginary component of a transfer function of a channel, over which the received OFDM-signal has been transmitted, derived from the FFT-output signal where the frequency dependent phase rotation component has been removed is determined, and a delay spread estimate is calculated based on the determined number of zero-crossings.Type: ApplicationFiled: December 8, 2008Publication date: January 27, 2011Applicant: TELEFONAKTIEBOLAGET L.M. ERRICSSONInventors: Leif Wilhelmsson, Bo Bernhardsson, Lars Björkman
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Publication number: 20110002403Abstract: Methods for positioning an FFT-window in an OFDM-receiver are disclosed as well as electronic apparatuses and computer program products for performing the methods. The method comprises determining a position of the FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal, using the position of the FFT-window to obtain a first OFDM-symbol from the received OFDM-signal, and applying an FFT to the first OFDM-symbol to produce an FFT-output signal. The method also comprises determining a frequency dependent phase rotation component of the FFT-output signal, and removing the determined frequency dependent phase rotation component from the FFT-output signal to obtain a compensated FFT-output signal. A delay spread estimate is calculated based on at least one of the FFT-output signal and the compensated FFT-output signal, and the position of the FFT-window is adjusted based on at least the determined frequency dependent phase rotation component and the calculated delay spread estimate.Type: ApplicationFiled: December 8, 2008Publication date: January 6, 2011Inventors: Leif Wilhelmsson, Lars Bjorkman, Frederik Norström
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Publication number: 20100107527Abstract: A frame device adapted to be mounted between a balcony slab and a roof slab (2) located above the former supports wall elements (16, 16?, 16?) for building-in a balcony. The frame device has an upper horizontal sectional element (17), which supports a cover strip (28), which extends parallel thereto and is fastened thereto by holder means (26). The cover strip (28) has a leg (28a), which is inserted into a pocket (27) formed between the holder means (26) and a supporting surface (25) of the sectional element (17). The cover strip (28) is extractable from a retracted position in the pocket (27) to an arbitrarily extracted position so as to provide, when the frame device is mounted between the balcony slab and the roof slab (2), a visual screening off of a gap (S), which is formed between the roof slab (2) and the sectional element (17).Type: ApplicationFiled: October 18, 2006Publication date: May 6, 2010Applicant: NORDISKA BALCO ABInventor: Lars Björkman
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Publication number: 20100005750Abstract: A frame device adapted to be mounted between a balcony slab and a roof slab (2) located above the former supports wall elements (16, 16?, 16?) for building-in a balcony. The frame device has an upper horizontal sectional element (17), which supports a second sectional element (31), which is parallel thereto and which is connected to the upper horizontal sectional element pivotally about a pivot axis parallel to the upper horizontal sectional element (17). The second sectional element (31), which is arranged to support a blind device (35) adapted for the balcony, is pivotable relative to the upper horizontal sectional element (17) between an inwardly pivoted position and an outwardly pivoted position for use of the blind device (35).Type: ApplicationFiled: October 18, 2006Publication date: January 14, 2010Applicant: NORDISKA BALCO AB.Inventor: Lars Björkman
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Publication number: 20050284024Abstract: A sliding window arrangement has an upper and a lower horizontal guide rail and a vertical rectangular window which is mounted between the guide rails and displaceable along the same. The window has at each upper corner a guide means which engages the upper guide rail, and at each lower corner a guide means which engages the lower guide rail. The lower guide rail has a stop means which is positioned so that the window, when on displacement towards a displacement end position it reaches this position, abuts against the stop means in its lower front corner and, owing to its kinetic energy, is tilted to a tilted position about an imaginary tilt axis extending perpendicular to the window. In the tilted position, the guide means located in the lower rear corner of the window is disengaged from the lower guide rail.Type: ApplicationFiled: October 2, 2003Publication date: December 29, 2005Inventors: Lars Bjorkman, Rune Ljung, Ulf Lind
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Patent number: 6370830Abstract: A frame structure, which is adapted to be mounted between a horizontal lower balcony slab (1) and a horizontal upper balcony slab (2) located straight above the former, is arranged to support wall plates (9, 10) for at least partial building-in of the space between the balcony slabs (1, 2). The frame structure has a lower horizontal sectional element (12) arranged to be attached to the lower balcony slab (1), an upper horizontal sectional element (11) arranged to be attached to the upper balcony slab (2), an intermediate horizontal sectional element (13) and two vertical sectional elements (14, 15). The upper and the intermediate horizontal sectional elements (11 and 13) are arranged to support between themselves wall plates (10), such as glass plates, which are horizontally displaceable relative to each other. The vertical sectional elements (14, 15) consist of hollow sectional elements.Type: GrantFiled: October 6, 2000Date of Patent: April 16, 2002Assignee: Nordiska Balco ABInventor: Lars Björkman
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Patent number: 4476606Abstract: A wall-mounted foldable airing or carpet-beating stand comprising an attachment bracket secured to the wall to support the inner end of a bar which in position of use of the stand assumes a horizontal position, and two support legs pivotally mounted in pivot points at the outer end of the bar. The bar is mounted for pivotal movement about a horizontal shaft in the attachment bracket. The shaft is displaceable in the vertical direction along slits or channels formed in the attachment bracket from or towards a lower operational position of the bar and an upper position of rest. In this position the bar may be pivoted to a vertical position.Type: GrantFiled: June 27, 1983Date of Patent: October 16, 1984Assignee: Promovo ABInventors: Lars Bjorkman, Borje Bang