Patents Assigned to Broadcom
  • Patent number: 8345689
    Abstract: Systems and methods that identify the Upper Layer Protocol (ULP) message boundaries are provided. In one example, a method that identifies ULP message boundaries is provided. The method may include one or more of the following steps: attaching a framing header of a frame to a data payload to form a packet, the framing header being placed immediately after the byte stream transport protocol header, the framing header comprising a length field comprising a length of a framing protocol data unit (PDU); and inserting a marker in the packet, the marker pointing backwards to the framing header and being inserted at a preset interval.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Uri Elzur
  • Patent number: 8346546
    Abstract: A packet loss concealment method and system is described that attempts to reduce or eliminate destructive interference that can occur when an extrapolated waveform representing a lost segment of a speech or audio signal is merged with a good segment after a packet loss. This is achieved by guiding a waveform extrapolation that is performed to replace the bad segment using a waveform available in the first good segment or segments after the packet loss. In another aspect of the invention, a selection is made between a packet loss concealment method that performs the aforementioned guided waveform extrapolation and one that does not. The selection may be made responsive to determining whether the first good segment or segments after the packet loss are available and also to whether a segment preceding the lost segment and the first good segment following the lost segment are deemed voiced.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Juin-Hwey Chen
  • Patent number: 8345732
    Abstract: A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Matthew James Fischer, Joonsuk Kim, Christopher J. Hansen, Jason A. Trachewsky
  • Patent number: 8343235
    Abstract: Systems and methods of theft prevention of communication devices are provided. In one embodiment, the method may include, for example, one or more of the following: registering a communication device being used at a home, where the device is connected to a communication network; entering validation information relating to the communication device; and analyzing the validation information to determine whether the communication device is authorized for use in the communication network.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 8346262
    Abstract: Aspects of a method and system for utilizing tone grouping with Givens rotations to reduce overhead associated with explicit feedback information are presented. In one aspect of the invention, Givens matrices may be utilized to reduce a quantity of information communicated in explicit feedback information via an uplink RF channel. The explicit feedback information may include specifications for a feedback beamforming matrix that may be utilized when transmitting signals via a corresponding downlink RF channel. The feedback beamforming matrix may represent a rotated version of an un-rotated matrix. The Givens matrices may be utilized to apply one or more Givens rotations to un-rotated matrix. The rotated matrix may reduce the quantity of information communicated in the explicit feedback information. The quantity of information communicated in the explicit feedback information may be further reduced by utilizing tone grouping.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Joonsuk Kim
  • Patent number: 8344819
    Abstract: Methods, systems, and apparatuses for circuit boards are provided herein. An electrically insulating material is formed over one or more traces on a circuit board. One or more further electrically conductive features are present on the circuit board. A layer of an electrically conductive material is formed over the one or more traces that is electrically isolated from the one or more traces by the electrically insulating material, and is in electrical contact with the one or more further electrically conductive features. The electrically conductive material confines magnetic and electric fields produced when the one or more traces conduct an alternating current. By confining the magnetic and electric field distributions in this manner, problems of interference and/or crosstalk with adjacent signal traces are reduced or eliminated.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Sampath Komarapalayam Velayudham Karikalan
  • Patent number: 8347357
    Abstract: In multimedia systems requiring secure access, a method and apparatus for constructing an access control matrix for a set-top box security processor are provided. A security processor may comprise multiple security components and may support multiple user modes. For each user mode supported, at least one access rule table may be generated to indicate access rules to a security component in the security processor. An access control list comprises information regarding the access rules for a particular user mode to the security components in the security processor. An access control matrix may be generated based on the access control lists for the user modes supported by the security component. The access control matrix may be implemented and/or stored in the security processor for verifying access rights of a user mode. Results of operations associated with security components may be transferred to other processors communicatively coupled to the security processor.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Xuemin Chen, Iue-Shuenn Chen, Shee-Yen Tan, Hongbo Zhu, Qiang Ye
  • Patent number: 8345704
    Abstract: Aspects of a method and system for multi-radio coexistence and a collaborative interface may include exchanging information between a plurality of radio transceivers integrated within a single device to enable coexistence, and coordinating sharing of transmit and receive resources between the plurality of radio transceivers by controlling access to the transmit and receive resources, where any one of the plurality of radio transceivers may be enabled to be selected to control the access based on the exchanged information. Selecting one of the radio transceivers for the controlling of the access band may be based on processing capability or priority of communication. The resources may comprise frequency bands, time slots, and antenna access. The information may be exchanged via a serial bus between the plurality of radio transceivers, where the serial bus may conform to an I2C (I-square-C) multi-master serial bus. Each of the radio transceivers may conform to one or more radio frequency technology.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Prasanna Desai, Brima Ibrahim, John Walley, Gang Lu
  • Patent number: 8347008
    Abstract: Certain aspects of a method and system for a hardware-based implementation of USB 1.1 over a high-speed link may comprise translating at a client side of a client server communication system, USB protocol messages comprising a first USB standard to corresponding encapsulated USB protocol messages, wherein the USB protocol messages comprising the first USB standard are received from a client device at the client side of the client server communication system. The translated corresponding encapsulated USB protocol messages may be communicated from the client side to a server at a server side of the client server communication system.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Sasi K. Kumar
  • Patent number: 8346267
    Abstract: Aspects of a method and system for controlling data distribution via cellular communications with an integrated femtocell and set-top-box (IFSTB) device are provided. In this regard, a cellular enabled communication device may detect when it is within cellular communication range of a femtocell. Upon detection of the femtocell, the cellular enabled communication device may communicate instructions to a content source instructing the content source to deliver multimedia content to the femtocell. In instances that multimedia content is already being delivered to the cellular enabled communication device prior to the detection, the instructions from the cellular enabled communication device may instruct the content source to redirect the multimedia content to the femtocell. In this regard, the multimedia content may be delivered from the content source to the cellular enabled communication device via the femtocell.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Xuemin Sherman Chen, Charles Abraham, Wael William Diab, Vinko Erceg, Victor T. Hou, Jeyhan Karaoguz, Mark Kent
  • Patent number: 8345553
    Abstract: Apparatus and methods for reducing latency in coordinated networks. The apparatus and methods relate to a protocol that may be referred to as the Persistent Reservation Request (“p-RR”), which may be viewed as a type of RR (reservation request). p-RR's may reduce latency, on average, to one MAP cycle or less. A p-RR may be used to facilitate Ethernet audiovisual bridging. Apparatus and methods of the invention may be used in connection with coaxial cable based networks that serve as a backbone for a managed network, which may interface with a package switched network.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Yitshak Ohana, Philippe Klein, Avi Kliger, Stephen Palm
  • Patent number: 8347121
    Abstract: A system and method for adjusting an energy efficient Ethernet (EEE) control policy using measured power savings. An EEE-enabled device can be designed to report EEE event data. This reported EEE event data can be used to quantify the actual EEE benefits of the EEE-enabled device, debug the EEE-enabled device, and adjust the EEE control policy.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Brad Matthews, Puneet Agarwal, Bruce Kwan
  • Patent number: 8346272
    Abstract: A method of accommodating aberrant behavior in wireless devices in a wireless network includes the steps of establishing communication with at least one wireless device, monitoring signals received from the at least one wireless device, determining characteristics of the at least one wireless device based on the monitored signals, comparing the determined characteristics with prescribed characteristics for wireless devices exhibiting aberrant behavior and altering settings to accommodate the at least one wireless device, when the determined characteristics match the prescribed characteristics.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Daniel Thomas Daum
  • Patent number: 8345148
    Abstract: Certain aspects of a method and system for inverse telecine and scene change detection of progressive video may include determining a cadence, for example, 3:2 or 2:2 pulldown, and phase of received progressive input pictures. A difference between two or more consecutive received progressive input pictures may be determined. The motion compensation of a plurality of output pictures may be controlled based on the determined cadence, phase and difference between two or more consecutive received progressive input pictures. The system may be enabled to determine repeated pictures and scene changes. The motion compensation of output pictures may be stopped during detected scene changes.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Frederick Walls, Richard Hayden Wyman
  • Patent number: 8346899
    Abstract: A server comprising a network interface controller (NIC) may be operable to determine network components and/or resources that may be utilized to create, modify and/or terminate a hyper-channel in a network fabric. A configuration for creating, modifying and/or terminating the hyper-channel may be initiated by the NIC based on knowledge of the network fabric up to the edge of network and each of the switches along a path of the hyper-channel may be instructed by the NIC to configure the hyper-channel. The configuration may also be initiated by the NIC based on knowledge of the network fabric up to a first hop and each of the switches along a path of the hyper-channel may then be allowed to configure the hyper-channel based on knowledge of the network fabric surrounding each of the switches.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Hemal Shah, Burhan Masood, Frankie Fan, Robert Lusinsky, Vijay Sagar
  • Patent number: 8346192
    Abstract: A transmitter includes a detection element to determine when a current power requirement of a communication link is less than the standard transmit power. The current power requirement may be determined by a current operation condition of the communication link, for instance. The transmit power of the transmitter may be set to be less than the standard power in any of a variety of ways. For example, a center tap voltage of the transmitter may be reduced. In another example, a class of operation of the transmitter may be changed. In yet another example, the transmitter may include a current mirror having a plurality of diode-connected transistors coupled in parallel, thereby reducing the current at output terminals of the transmitter. Reducing the current at the output terminals decreases the output power of the transmitter, which may reduce the power consumed by the transmitter.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Kevin T. Chan
  • Patent number: 8345591
    Abstract: A wireless mobile communication (WMC) device may be determine a quality of service (QOS) required to communicate data. The WMC device may utilize a plurality of physical layers available in the WMC device to retain the QOS throughout the data communication. The physical layers may comprise a plurality of wireless technologies and/or a plurality of transmission power levels within each wireless technology. Selection of physical layers that may be utilized may comprise determination of available QOS through the physical layers, available power in the WMC device, and/or power requirement for communicating data via the physical layers. Data encoding may also be utilized to alter size of communicated data while retaining the required QOS. Data encoding may comprise utilizing encoding schemes, data compression, and/or redundancy bits. A set of deadlines may be utilized to enable switching between available physical layers to ensure maintaining and/or achieving required QOS.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Alexander G. MacInnis, Thomas Quigley, Arya Behzad, Jeyhan Karaoguz, John Walley, Mark Buer
  • Patent number: 8346185
    Abstract: Aspects of a method and system for enhancing efficiency by modulating power amplifier (PA) gain are presented. Aspects of the system may comprise a PA gain modulator that enables modification of an amplitude of a digital baseband signal. A baseband processor may enable computation of a first gain value based on the modification. The baseband processor may enable computation of a second gain value based on the first gain value. A PA may enable generation of an RF output signal based on the modified digital baseband signal and the second gain value.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Ali Afashi, Vikram Magoon, Arya Behzad
  • Publication number: 20120326904
    Abstract: Techniques and devices provide analog-to-digital conversion at two or more signal frequencies or frequency bands and can be used to construct multi-mode analog-to-digital converters in various circuits, including receivers and transceivers for wireless communications and radio broadcast environments. Adjustable analog-to-digital converters based on the described techniques can be configured to adjust circuit parameters to adapt the technical specifications of different input signals at different signal frequencies or frequency bands, such as FM, HD-radio, and DAB radio signals in radio receiver applications.
    Type: Application
    Filed: June 27, 2011
    Publication date: December 27, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Henrik Tholstrup Jensen, Jianhua Gan, Seema Anand, Aminghasem Safarian
  • Publication number: 20120329391
    Abstract: A near field communications (NFC) device is disclosed that detects a presence of another NFC capable device within its magnetic field. The NFC device provides a detection sequence having one or more detection signals to its environment. The NFC device observes the detection sequence as it is being provided to its environment to recover one or more observed detection signals. The NFC device determines a difference between the observed detection signals and one or more previous observed detection signals and/or the detection signals. The NFC device characterizes the difference as resulting from changes in the environment when the difference is linear or as resulting from another NFC capable device being present within its magnetic field when the difference is non-linear.
    Type: Application
    Filed: September 30, 2011
    Publication date: December 27, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Steven Deane Hall, Brima Ibrahim, Philip Stewart Royston, Thomas Fung, Frederick Mang-Hong Leung