Patents Assigned to Broadcom
  • Patent number: 8184652
    Abstract: A linking list transmit queue system includes a queue, packet buffer and buffer tag with one-to-one mapping between them. The packet buffer stores packet data, the buffer tag stores packet data length and the queue stores a linking list of addresses corresponding to the packet data in the order in which the packet data was received from a transmitting network node. The system transmits the stored packet data in the order it was received from the transmitting network node to a destination network node.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventor: Cheng-Liang (Andrew) Hou
  • Publication number: 20120123771
    Abstract: Unlike sound based pressure waves that go everywhere, air turbulence caused by wind is usually a fairly local event. Therefore, in a system that utilizes two or more spatially separated microphones to pick up sound signals (e.g., speech), wind noise picked up by one of the microphones often will not be picked up (or at least not to the same extent) by the other microphone(s). Embodiments of methods and apparatuses that utilize this fact and others to effectively detect and suppress wind noise using multiple microphones that are spatially separated are described.
    Type: Application
    Filed: September 30, 2011
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Juin-Hwey CHEN, Jes THYSSEN, Xianxian ZHANG, Huaiyu ZENG
  • Publication number: 20120123772
    Abstract: Multi-channel noise suppression systems and methods are described that omit the traditional delay-and-sum fixed beamformer in devices that include a primary speech microphone and at least one noise reference microphone with the desired speech being in the near-field of the device. The multi-channel noise suppression systems and methods use a blocking matrix (BM) to remove desired speech in the input speech signal received by the noise reference microphone to get a “cleaner” background noise component. Then, an adaptive noise canceler (ANC) is used to remove the background noise in the input speech signal received by the primary speech microphone based on the “cleaner” background noise component to achieve noise suppression. The filters implemented by the BM and ANC are derived using closed-form solutions that require calculation of time-varying statistics of complex frequency domain signals in the noise suppression system.
    Type: Application
    Filed: November 14, 2011
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Jes Thyssen, Huaiyu Zeng, Juin-Hwey Chen, Nelson Sollenberger, Xianxian Zhang
  • Publication number: 20120124405
    Abstract: A system and method for energy savings on a PHY/MAC interface for energy efficient Ethernet. Power savings for a PHY due to low-link utilization can also be realized in the higher layer elements that interface with the PHY. In one embodiment, subrating is implemented on a MAC/PHY interface to match a subrating of the PHY with a remote link partner. This subrating is less than the full capacity rate and can be zero.
    Type: Application
    Filed: January 21, 2012
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Wael William Diab, Scott Powell, Howard Baumer
  • Publication number: 20120121042
    Abstract: A configuration controller generates one or more control signals based on channel data. The channel data includes requirements data received via the stream of inbound data, wherein the requirements data includes at least one of: a quality of service requirement, and a signal latency limit. A receiver includes an RF receiver section and a receiver processing module that are configured in response to the control signal.
    Type: Application
    Filed: January 25, 2012
    Publication date: May 17, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20120124093
    Abstract: A network interface device includes a security database and a security services engine. The security database is configured to store patterns corresponding to predetermined malware. The security services engine is configured to compare data to be transmitted through a network to the patterns stored in the security database, and the security database is configured to receive updated patterns from the network.
    Type: Application
    Filed: January 26, 2012
    Publication date: May 17, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Bora Akyol, Puneet Agarwal
  • Publication number: 20120124280
    Abstract: The present application discloses a memory controller for accessing an external memory device. The memory controller comprises a bus interface and an internal memory buffer capable of accessing the bus interface. The internal memory buffer operates as an on-chip storage. In various embodiments of the disclosure, the internal memory buffer operates during a testing of a chip containing the memory controller. For example, the internal memory buffer may emulate the external memory device in response to an input signal. Moreover, in various embodiments of the disclosure, the external memory device may be a dynamic random access memory (DRAM), while the to internal memory buffer may be a static random access memory (SRAM). The memory controller may be adapted to automated test equipment (ATE). Moreover, the memory controller may be incorporated onto a system-on-a-chip (SOC) along with one or more agents.
    Type: Application
    Filed: November 17, 2010
    Publication date: May 17, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Koray Oner
  • Publication number: 20120121006
    Abstract: An update algorithm for equalizer coefficients in a communications system using phase correction symbols. Instead of using a traditional all symbols slicer update algorithm, the equalizer is updated during phase correction symbols for optimal performance in low signal-to-noise ratio conditions. In lower signal-to-noise ratio conditions, the equalizer uses a phase correction circuit to compensate for distortion caused by a communication channel when a demodulated data stream contains an unknown phase offsets resulting from a fast dynamic distortion. More specifically, the phase correction circuit uses a phase correction signal to correct for the unknown phase offsets in a demodulated data stream in lower signal-to-noise ratio conditions. The equalizer then corrects for distortion caused by the communication channel based upon the phase corrected demodulated data stream.
    Type: Application
    Filed: January 25, 2012
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Tommy YU, Amy Gayle Hundhausen
  • Publication number: 20120124259
    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: Application
    Filed: January 23, 2012
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventor: Sasi K. Kumar
  • Publication number: 20120124398
    Abstract: A system for measuring aspects of a network having a plurality of network components, includes a monitor configured to gather operational characteristics of at least one of the plurality of network components and an analyzer. The analyzer is configured to analyze the gathered operational characteristics received from the monitor and estimate characteristics of an unmonitored one of the plurality of network components based on the gathered operational characteristics.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventor: Wael William DIAB
  • Publication number: 20120123773
    Abstract: Described herein are multi-channel noise suppression systems and methods that are configured to detect and suppress wind and background noise using at least two spatially separated microphones: at least one primary speech microphone and at least one noise reference microphone. The multi-channel noise suppression systems and methods are configured, in at least one example, to first detect and suppress wind noise in the input speech signal picked up by the primary speech microphone and, potentially, the input speech signal picked up by the noise reference microphone. Following wind noise detection and suppression, the multi-channel noise suppression systems and methods are configured to perform further noise suppression in two stages: a first linear processing stage that includes a blocking matrix and an adaptive noise canceler, followed by a second non-linear processing stage.
    Type: Application
    Filed: November 14, 2011
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Huaiyu ZENG, Jes Thyssen, Nelson Sollenberger, Juin-Hwey Chen, Xianxian Zhang
  • Publication number: 20120120837
    Abstract: A handheld computing unit includes a plurality of PHY units, a local wireless interface (LWI), and a processing module. When the unit is in a femtocell AP mode, the processing module performs one or more femtocell AP functions to facilitate conversion of a LWI downstream data into one or more downstream PHY signals and conversion of one or more upstream PHY signals into the LWI upstream data; determines energy demand of the handheld computing unit; determines whether the energy demand compares unfavorably to energy performance criteria; and, when the energy demand compares unfavorably to the energy performance criteria, executes an energy adjustment algorithm.
    Type: Application
    Filed: January 24, 2012
    Publication date: May 17, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20120121100
    Abstract: Unlike sound based pressure waves that go everywhere, air turbulence caused by wind is usually a fairly local event. Therefore, in a system that utilizes two or more spatially separated microphones to pick up sound signals (e.g., speech), wind noise picked up by one of the microphones often will not be picked up (or at least not to the same extent) by the other microphone(s). Embodiments of methods and apparatuses that utilize this tact and others to effectively detect and suppress wind noise using multiple microphones that are spatially separated are described.
    Type: Application
    Filed: September 30, 2011
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Xianxian ZHANG, Juin-Hwey Chen, Huaiyu Zeng, Jes Thyssen
  • Publication number: 20120122518
    Abstract: A multimode communication device with a shared signal path programmable filter and a method for utilizing a shared signal path programmable filter in a multimode communication device. Various aspects of the present invention comprise a first module adapted to receive a first communication signal (e.g., corresponding to a first communication protocol) and a second module adapted to receive a second communication signal (e.g., corresponding to a second communication protocol). A shared filter, communicatively coupled to the first and second modules, may be adapted to filter the first and/or second communication signals in accordance with a plurality of selectable sets of filter response characteristics (e.g., associated with the first and second communication protocols). A filter control module may be adapted to select a set of filter response characteristics from a plurality of such sets and program the shared filter to filter a communication signal in accordance with the selected set.
    Type: Application
    Filed: January 23, 2012
    Publication date: May 17, 2012
    Applicant: Broadcom Corporation
    Inventors: Arya Behzad, Ahmadreza Rofougaran
  • Patent number: 8180648
    Abstract: Certain aspects of a method and system for a dual mode subband acoustic echo canceller with integrated noise suppression may include splitting an input signal into a lowband component and a highband component. The subbands of each of the lowband component and the highband component may be processed in order to reduce an echo associated with the input signal and to suppress the noise associated with the input signal.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: May 15, 2012
    Assignee: Broadcom Corporation
    Inventors: Wilfrid LeBlanc, Jes Thyssen
  • Patent number: 8180409
    Abstract: A radio receiver includes a power control module for selectively powering down and powering up radio receiver elements in between known communication periods according to one aspect of the present invention. According to a second aspect of the invention, the radio receiver operates in a low power mode of operation and periodically “sniffs” to determine whether an access point has messages or communication signals to transmit to it.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: May 15, 2012
    Assignee: Broadcom Corporation
    Inventor: Jeyhan Karaoguz
  • Patent number: 8178944
    Abstract: According to one exemplary embodiment, a method for forming a one-time programmable metal fuse structure includes forming a metal fuse structure over a substrate, the metal fuse structure including a gate metal segment situated between a dielectric segment and a polysilicon segment, a gate metal fuse being formed in a portion of the gate metal segment. The method further includes doping the polysilicon segment so as to form first and second doped polysilicon portions separated by an undoped polysilicon portion where, in one embodiment, the gate metal fuse is substantially co-extensive with the undoped polysilicon portion. The method can further include forming a first silicide segment on the first doped polysilicon portion and a second silicide segment on the second doped polysilicon portion, where the first and second silicide segments form respective terminals of the one-time programmable metal fuse structure.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: May 15, 2012
    Assignee: Broadcom Corporation
    Inventors: Wei Xia, Xiangdong Chen, Akira Ito
  • Patent number: 8180314
    Abstract: Aspects of a method and system for utilizing Givens rotation to reduce feedback information overhead are presented. Aspects of the system may include a receiver that may enable computation of a beamforming matrix for signals received from a transmitter in a multiple input multiple output (MIMO) communication system. The receiver may enable computation of Givens rotation angles and/or phase rotation angles based on the computed beamforming matrix. The receiver may also enable feedback of information containing the Givens rotation angles and/or phase rotation angles to the transmitter.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: May 15, 2012
    Assignee: Broadcom Corporation
    Inventor: Joonsuk Kim
  • Patent number: 8179910
    Abstract: A network device comprising asymmetric, multi-rate, Ethernet MAC and asymmetric, multi-rate, Ethernet PHY communicates signals via a network utilizing A/V bridging services. Higher bandwidth A/V signals are communicated and lower bandwidth signals are received or vice versa. Signals are communicated based on a plurality of different Ethernet protocols and/or data rates. Signals may be communicated based on 10GBASE-T in a first direction and based on a lower rate Ethernet protocol in a second direction. Extended range mode may be utilized. PDUs comprise time stamps, traffic class designations and/or destination addresses. Data rate requests, resource reservation messages and/or registration for delivery of PDUs may be communicated. Time stamps enable end to end transport within a specified latency target. Video signals may be compressed, uncompressed, encrypted, unencrypted and/or formatted for a video display interface.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: May 15, 2012
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Yong Kim, Scott Powell
  • Patent number: 8179983
    Abstract: A video processing system includes a video encoder that encodes a video stream into a independent video layer stream and a first dependent video layer stream based on a motion vector data or grayscale and color data.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: May 15, 2012
    Assignee: Broadcom Corporation
    Inventors: Stephen E. Gordon, Jeyhan Karaoguz, Sherman (Xuemin) Chen, Michael Dove, David Rosmann, Thomas J. Quigley