Patents Assigned to Broadcom
  • Patent number: 9177176
    Abstract: Aspects of a method and apparatus for a secure system-on-a-chip (SOC) architecture for multimedia data processing are provided. A processor may configure at least one subsystem within the SOC via at least one unsecured bus while a security processor enables secure functionalities in configured subsystems via at least one secure bus. The unsecure buses may comprise a data bus and/or a control bus, for example. The secure buses may comprise a secure control bus and/or a secure key bus, for example. The configurable subsystems may be multimedia processing units, input and output modules, and/or memory controllers. The security processor may program bits in security registers within the subsystems to enable secure functionalities, such as data routing paths and/or key loading paths, for example. Moreover, the security processor may validate code to be executed by a processor for configuring the SOC subsystems.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventor: Xuemin Chen
  • Patent number: 9179472
    Abstract: A circuit includes a first wireless interface circuit that communicates packetized data to a first external device in accordance with a first wireless communication protocol. A second wireless interface circuit communicates packetized data to a second external device in accordance with a second wireless communication protocol. A plurality of signal lines communicate at least four lines of cooperation data between the first wireless interface circuit and the second wireless interface circuit, wherein the cooperation data relates to cooperate transceiving in a common frequency spectrum.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Sudhirkumar Jasubhai Prajapati, Neeraj Bhoja Poojary, Gabriel Marc Desjardins, Sanjay Saha, Sachin Gupta, Prasanna Prakash Desai, Pawan Kumar
  • Patent number: 9178692
    Abstract: A method is disclosed for handling packet data. The method includes assembling request packets for transmission along a plurality of serial lanes. For each lane, at least a portion of the request packets are framed into a request link frame having a plurality of words. The request link frame is defined by a preset word length. Request training words are inserted into the request link frame at intervals corresponding to the preset word length. Response packets are queued, where the response packets include response training words having an associated latency based on the programmed interval of the request training words.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: November 3, 2015
    Assignee: BROADCOM CORPORATION
    Inventor: Shankar Channabasappa
  • Patent number: 9176563
    Abstract: A system and method are provided to improve power efficiency of processor cores, such as processor cores in a multicore processor. A break-even time of a processor core may be determined that affects which power saving mode a processor core should enter when an expected idle of the processor core is identified. The break-even time of the processor core may be determined during run-time to help determine an applicable power saving mode that improves power efficiency of the processor core.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventor: Hwisung Jung
  • Patent number: 9177565
    Abstract: Methods and systems for processing data disclosed herein includes, in a transceiver chip comprising at least one on-chip processor, compressing, by the at least one on-chip processor, audio information received by the transceiver chip. The compressing utilizes an on-chip audio codec implemented within said at least one on-chip processor. The at least one on-chip processor determined, within said transceiver chip, a frame size of at least one audio frame comprising the compressed audio information.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: November 3, 2015
    Assignee: BROADCOM CORPORATION
    Inventors: Jason Hillyard, Robert William Hulvey, John Walley, Victor Zhodzishsky
  • Patent number: 9179136
    Abstract: A 3D shutter glasses device, coupled via a wireless link to a 3D video display device, maintains a slave clock synchronized with a master clock in the display device. The clocks may comprise Bluetooth clocks. The shutter glasses receive 3D frame display information and time information referenced to the master clock that corresponds to when frames are displayed. The shutter glasses control opening and closing of left and right shutters utilizing slave clock time and the received information. The received display information comprises left, right and/or blank frame pattern information, a frame pattern time interval, a frame refresh rate and a time offset for delaying opening and/or closing of shutters. The time information indicates master clock time when frames are displayed. The shutter glasses and the display maintain synchronization when display and/or time information updates are skipped. The shutter glasses may transmit information to the display device.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Robert William Hulvey, Shawn Shiliang Ding
  • Patent number: 9178553
    Abstract: Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, a stop band noise signal is extracted from an L+R or L?R signal produced by an FM stereo decoder. A channel quality measure is calculated based on the stop band noise signal and is used to control whether a pop suppression technique is applied to the L+R signal. The channel quality measure and the stop band noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on the L?R signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L?R and L+R signal with replacement waveforms generated via waveform extrapolation.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Juin-Hwey Chen, Thomas F. Baker, Evan S. McCarthy, Jes Thyssen, Walter J. Wihardja, David C. Garrett
  • Patent number: 9179407
    Abstract: Systems and methods are provided that may reduce unnecessary resource consumption and network traffic in a communications network, such as an LTE network. Initiating a tracking area update (TAU) procedure may be avoided in instances where a discontinuous reception (DRX) cycle length chosen by a user equipment (UE) would be ignored in accordance with standards governing paging in the communications networks. To determine whether or not a TAU should be initiated, three parameters may be considered. A first parameter may be the DRX cycle length that is already configured in a mobility management entity (MME). A second parameter may be a DRX cycle length chosen by the UE that the UE wishes to indicate to the MME. A third parameter may be a DRX cycle length that is broadcast by an evolved Node B serving a cell in which the UE is operating.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: November 3, 2015
    Assignee: BROADCOM CORPORATION
    Inventors: Sushruth Nagaraj Donthi, Pradeep Seshadri
  • Patent number: 9179428
    Abstract: A communications device having a communication channel interface between a cellular communications module and a Global Navigation system (GNSS) module is provided. The communication channel interface can be used to forward one or more of: a frequency offset correction message, a fine time assistance (FTA) message, and an assisted-GNSS (A-GNSS) message from the cellular communications module to the GNSS module; to forward timing and frequency information from the GNSS module to the cellular communications module to enable a delayed sleep mode wake up of the cellular communications module; to enable hybrid data fusion between the cellular communications module and the GNSS module; and/or to offload processes from the GNSS module to the cellular communications module.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Kamesh Medapalli, Robert Lorenz, Charles Abraham, Brima Ibrahim, Frank van Diggelen
  • Patent number: 9178653
    Abstract: A communication device is configured to encode and/or decode low density parity check (LDPC) coded signals. Such LDPC coded signals are characterized by LDPC matrices having a particular form. An LDPC matrix may be partitioned into a left hand side matrix and the right hand side matrix. The right hand side matrix can be lower triangular such that all of the sub-matrices therein are all-zero-valued sub-matrices (e.g., all of the elements within an all-zero-valued sub-matrix have the value of “0”) except for those sub-matrices located on a main diagonal of the right hand side matrix and another diagonal that is adjacently located to the left of the main diagonal. A device may be configured to employ different LDPC codes having different LDPC matrices for different LDPC coded signals. The different LDPC matrices may be based generally on a common form (e.g., with a right hand side matrix as described above).
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Ba-Zhong Shen, Avi Kliger, Tak K. Lee
  • Patent number: 9179502
    Abstract: Communications are coordinated between different respective wireless communication device groups in a multiple delivery traffic indication map (DTIM) per device signaling scheme. Different respective wireless communication devices (e.g., wireless stations (STAs)) may communicate with a manager/coordinator wireless communication device (e.g., access point (AP)) at different times and for different reasons. The manager/coordinator wireless communication device generates and transmits beacons to the wireless communication devices specifying times during which communications may be supported with the manager/coordinator wireless communication device. A restricted access window (RAW) information element (IE) within a beacon includes at least one restricted access window (RAW) to specify a wireless communication device authorized to communicate with the manager/coordinator wireless communication device.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventor: Matthew James Fischer
  • Patent number: 9178597
    Abstract: A method and apparatus of providing a base station with updated transmission channel information is disclosed. The method includes the base station transmitting beamformed signals to a first terminal. A second terminal receives the transmitted beamformed signals, and measures a signal quality. The second terminal conveys back to the base station the measured signal quality, and a transmission identifier of the beamformed data signal.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Bertrand Hochwald, Harold Artes
  • Patent number: 9178476
    Abstract: An envelope detector (ED) includes a voltage-mode ED core including parallel detection transistors for detecting a voltage envelope of an RF signal input. The detection transistors are configured with a size and for a current such that the transistors are biased in subthreshold regions of operation. The ED core is configured to variably control a bias current through the detection transistors, where the bias current is varied according to a voltage amplitude of the RF signal input to enhance a linear range of the ED while detection transistors continue to operate in subthreshold regions. A linearizer circuit may be configured to control the bias current based on feedback inputs from ED outputs. Several gain-programmable voltage amplifiers, which may include a final specialized class-AB amplifier, precede the ED core, to adapt a transmitter output voltage to an input range of the ED core, which extends the linear range of the ED.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Amir Hadji-Abdolhamid, Janice Chiu
  • Publication number: 20150309799
    Abstract: A processor including a stunt box with an intermediate storage, including a plurality of registers, configured to store a plurality of execution pipe results as a plurality of intermediate results; a storage, communicatively coupled to the intermediate storage, configured to store a plurality of storage results which may include one or more of the plurality of intermediate results; and an arbiter, communicatively coupled to the intermediate storage and the storage, configured to receive the plurality of execution pipe results, the plurality of intermediate results, and the plurality of storage results and to select an output to retire from of the plurality of results, the plurality of intermediate results, and the plurality of storage results.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 29, 2015
    Applicant: Broadcom Corporation
    Inventors: Sophie WILSON, Tariq KURD
  • Publication number: 20150309795
    Abstract: A method and apparatus for zero overheard loops is provided herein. The method includes the steps of identifying, by a decoder, a loop instruction and identifying, by the decoder, a last instruction in a loop body that corresponds to the loop instruction. The method further includes the steps of generating, by the decoder, a branch instruction that returns execution to a beginning of the loop body, and enqueing, by the decoder, the branch instruction into a branch reservation queue concurrently with an enqueing of the last instruction in a reservation queue.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 29, 2015
    Applicant: Broadcom Corporation
    Inventors: Tariq KURD, John REDFORD, Geoffrey BARRETT
  • Publication number: 20150309798
    Abstract: An apparatus including a queue configured to store a plurality of instructions and state information indicating whether each instruction of the plurality of instructions can be performed independently of older pending instructions; and a state-selection circuit configured to set a state information of each instruction of the plurality of instructions ifs view of an older pending instruction in the queue.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 29, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Tariq KURD, John REDFORD
  • Publication number: 20150309794
    Abstract: A method and system for branch prediction are provided herein. The method includes executing a program, wherein the program comprising multiple procedures, and setting bits in a taken branch history register to indicate whether a branch is taken or not taken during execution of instructions in the program. The method further includes the steps of calling a procedure in the program and overwriting, responsive to calling the procedure, the contents of the taken branch history register to a start address for the procedure.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 29, 2015
    Applicant: Broadcom Corporation
    Inventors: Sophie WILSON, Geoffrey BARRETT
  • Publication number: 20150309793
    Abstract: A load/store unit including a memory queue configured to store a plurality of memory instructions and state information indicating whether each memory instruction of the plurality of memory instructions can be performed independently, with, separately, or after older pending instructions; and a state-selection circuit configured to set a state information of each memory instruction of the plurality of memory instructions in view of an older pending instruction in the memory queue.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 29, 2015
    Applicant: Broadcom Corporation
    Inventor: Tariq KURD
  • Publication number: 20150312890
    Abstract: Methods and systems for communicating information in a wireless communication system are disclosed herein and may include determining at least a bit-error-rate (BER) for at least a DVB-H downlink communication path utilized for communicating multimedia content in a communication system. The communication system may include a plurality of downlink communication paths, at least two of the plurality of downlink communication paths may use different communication protocols, and at least one of the plurality of downlink communication paths may include the DVB-H downlink communication path. At least a portion of the multimedia content may be communicated via at least one of the plurality of downlink communication paths to at least one mobile communication device based on at least the determined at least the BER.
    Type: Application
    Filed: July 8, 2015
    Publication date: October 29, 2015
    Applicant: Broadcom Corporation
    Inventor: Pieter van ROOYEN
  • Publication number: 20150312158
    Abstract: Aspects of a method and system for medium access control (MAC) layer specialization for voice and multimedia data streams are presented. Aspects of the method include determining a number of attempts for transmitting one or more medium access control (MAC) frames. Aspects of the system may include a processor that enables determination of a number of attempts for transmitting one or more MAC frames. A maximum number for such attempts may be determined based on one or more priority levels associated with different portions of multimedia information being communicated via a wireless medium and contained within the one or more MAC frames.
    Type: Application
    Filed: July 9, 2015
    Publication date: October 29, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Hooman Honary, Matthew James Fischer