Patents Assigned to Broadcom Corporation
  • Publication number: 20130003717
    Abstract: A system and method for determining an information communication path based on energy requirements. Various aspects of the present invention provide a method that comprises identifying a plurality of information communication paths that may be utilized to communicate information (e.g., one or more units of information). A communication path identification module may perform such identification. Respective amounts of energy to communicate the information may be estimated for at least a portion of the identified plurality of information communication paths. A communication energy estimation module may perform such estimation. An information communication path may be selected from the identified plurality of information communication paths based, at least in part, on the estimated respective amounts of energy. A communication path selection module may perform such selection.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 3, 2013
    Applicant: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
  • Publication number: 20130007452
    Abstract: Aspects of a method and system for command authentication to achieve a secure interface are provided. Command authentication between a host and a slave device in a multimedia system may be achieved by on-the-fly pairing or by an automatic one-time-programming via a security processor. In an on-the-fly pairing scheme, the host may generate a host key based on a host root key and host control words while the slave may generate slave key based the host key, a slave root key and slave control words. The slave key may be stored and later retrieved by the slave device to obtain the host key for authenticating host commands. The host may be disabled from generating and/or passing the host key to the slave. In an automatic one-time programming scheme, the security processor may burn a random number onto a onetime-programmable memory in the host and slave devices for command authentication.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 3, 2013
    Applicant: Broadcom Corporation
    Inventors: Stephane Rodgers, Xuemin Chen
  • 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: 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: 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: 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: 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: 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: 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: 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: 8346196
    Abstract: Methods and systems for coexistence in a multiband, multistandard communication system utilizing a plurality of phase locked loops (PLLs) are disclosed. Aspects may include determining one or more desired frequencies of operation of a transceiver, determining a frequency of unwanted signals such as spurs, intermodulation, and/or mixing product signals, and configuring the PLLs to operate at a multiple of the desired frequencies while avoiding the unwanted signals. The desired frequencies may be generated utilizing integer, which may include multi-modulus dividers. The wireless standards may include LTE, GSM, EDGE, GPS, Bluetooth, WiFi, and/or WCDMA, for example. The frequencies may be configured to mitigate interference. PLLs may be shared when operating in TDD mode, and used separately operating in FDD mode. One or more digital interface signals, zero exceptions on a transmitter spur emission mask, and sampling clocks for ADCs and/or DACs in the transceiver may be generated utilizing the PLLs.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Nikolaos Haralabidis, Ioannis Kokolakis, Nikolaos Kanakaris, Konstantinos Vavelidis
  • 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: 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: 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: 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: 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
  • Patent number: 8345065
    Abstract: Systems and methods that provide graphics using a graphical engine are provided. In one example, a system may provide layered graphics in a video environment. The system may include a bus, a graphical engine and a graphical pipeline. The graphical engine may be coupled to the bus and may be adapted to composite a plurality of graphical layers into a composite graphical layer. The graphical engine may include a memory that stores the composite graphical layer. The graphical pipeline may be coupled to the bus and may be adapted to transport the composite graphical layer.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: January 1, 2013
    Assignee: Broadcom Corporation
    Inventors: David A. Baer, Darren Neuman
  • 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