Patents by Inventor Erik Ledfelt

Erik Ledfelt 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).

  • Patent number: 10180890
    Abstract: Systems and methods for monitoring hardware observation points within a System on a Chip (SoC) are disclosed. In one embodiment, a monitoring system includes observers electrically coupled to corresponding hardware observation points. For each observation time period, the observer receives events from a corresponding hardware observation point and outputs observation data indicative of the number of events received. Each observer operates in the same clock and power domain as the corresponding hardware observation point. The hardware monitoring system includes collectors; each collector receives the observation data from a corresponding observer for the observation time period(s). Each collector updates a value of a live-counter based on the observation data and outputs the value of the live-counter. By counting the number of events at the hardware observation points, the monitoring system can enable detailed runtime monitoring, which can be used, e.g.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: January 15, 2019
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Peter Tufvesson, Alberth Arvidsson, Erik Ledfelt
  • Publication number: 20150370678
    Abstract: Systems and methods for monitoring hardware observation points within a System on a Chip (SoC) are disclosed. In one embodiment, a monitoring system includes observers electrically coupled to corresponding hardware observation points. For each observation time period, the observer receives events from a corresponding hardware observation point and outputs observation data indicative of the number of events received. Each observer operates in the same clock and power domain as the corresponding hardware observation point. The hardware monitoring system includes collectors; each collector receives the observation data from a corresponding observer for the observation time period(s). Each collector updates a value of a live-counter based on the observation data and outputs the value of the live-counter. By counting the number of events at the hardware observation points, the monitoring system can enable detailed runtime monitoring, which can be used, e.g.
    Type: Application
    Filed: June 19, 2014
    Publication date: December 24, 2015
    Inventors: Peter Tufvesson, Alberth Arvidsson, Erik Ledfelt
  • Publication number: 20120218277
    Abstract: A display list with slot instructions is provided to interface between platform software and a display engine. A display list interface is created for each frame of image data that is to be updated and displayed on a display. In some circumstances, the display list may be reused for subsequent frames, for example, when generating a stream of video images for a video mode display showing a static image. A display list may be part of the interface between a software driver and a scalable display engine architecture that has multiple repetitive processing blocks enabling the same or multiple frames to be processed in parallel to produce update frames for one or more display devices.
    Type: Application
    Filed: February 25, 2011
    Publication date: August 30, 2012
    Applicant: ST-ERICCSON SA
    Inventors: NOELIA RODRIGUEZ MATILLA, TORBJÖRN SVENSSON, ERIK LEDFELT
  • Patent number: 7495672
    Abstract: A sampling pattern covering an array of pixels for use in an anti-aliasing system is disclosed where each pixel has a pattern of sample points at the edges of the pixel. Moreover is the sample point pattern of each pixel a mirror image and different from the pattern of a directly neighboring pixel.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: February 24, 2009
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Tomas Akenine-Möller, Fredrik Tolf, Martin Levin, Erik Ledfelt
  • Patent number: 7286823
    Abstract: A mobile multimedia system for a mobile terminal for a wireless telecommunications system and a method for enabling multimedia applications in a mobile terminal. The system includes a mobile multimedia engine having a software services component and a hardware component associated with and controlled by said software services component, and an interface component having at least one interface for providing access to the mobile multimedia engine. The system further includes multimedia application software loaded, installed and run in said mobile multimedia engine via the at least one interface in said interface component.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: October 23, 2007
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mikael Reinholdsson, Erik Ledfelt, Johan Svenér
  • Publication number: 20060061590
    Abstract: A sampling pattern covering an array of pixels for use in an anti-aliasing system is disclosed where each pixel has a pattern of sample points at the edges of the pixel. Moreover is the sample point pattern of each pixel a mirror image and different from the pattern of a directly neighboring pixel.
    Type: Application
    Filed: November 25, 2003
    Publication date: March 23, 2006
    Inventors: Tomas Akenine-Moller, Fredrik Tolf, Martin Levin, Erik Ledfelt
  • Publication number: 20030224770
    Abstract: A mobile multimedia system for a mobile terminal for a wireless telecommunications system and a method for enabling multimedia applications in a mobile terminal. The system includes a mobile multimedia engine having a software services component and a hardware component associated with and controlled by said software services component, and an interface component having at least one interface for providing access to the mobile multimedia engine. The system further includes multimedia application software loaded, installed and run in said mobile multimedia engine via the at least one interface in said interface component.
    Type: Application
    Filed: February 7, 2003
    Publication date: December 4, 2003
    Inventors: Mikael Reinholdsson, Erik Ledfelt, Johan Svener
  • Patent number: 6304517
    Abstract: A real time clock, suitable for use in mobile units in a radiocommunication system, is calibrated during production, and corrects for timing inaccuracies during normal operation. As a result, the accuracy of the real time clock's crystal oscillator is increased economically and efficiently. Frequency error correction is performed by periodically adjusting the frequency of the real time clock by a fixed amount once for every interval of time defined by an adjustment value. The adjustment value is determined by a calibration procedure performed during manufacture of the mobile unit.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: October 16, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Rolf Erik Ledfelt, Anders Wilhelm Östsjö