Patents Assigned to Broadcom
  • Patent number: 8750493
    Abstract: An exemplary embodiment of the present invention is directed toward a method and system for cancelling line echo in the presence of a known secondary audio signal. Filter adaptation is enabled in the presence of a known secondary audio source such as the sound of a computer game, a music signal or other secondary audio sources that would otherwise prevent echo cancellation due to an apparent double talk condition. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: James C. H. Thi, Theodore F. Rabenko
  • Patent number: 8752191
    Abstract: Methods, systems and computer program products to implement generic Digital Rights Management (DRM) are provided herein. The methods include opening a session between an initiator and a responder, exchanging one or more of device and system information and sending one of an operation or event based on DRM capabilities, DRM partner, DRM authority, DRM characteristics, DRM Trust and CCEVS profiles. The operation includes one or more of a dataset, response code, operation parameter and response parameter. These extensions may be in the form of one or more of an operation, an event, a dataset or property code.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventor: Scott Krig
  • Patent number: 8750394
    Abstract: A Powerline Communications (PLC) device includes processing circuitry, memory coupled to the processing circuitry, and a PLC interface coupled to the processing circuitry. The PLC device transmits a plurality of PLC queries, two of the plurality of PLC queries complying with differing PLC communication standards, receives a plurality of responses from a plurality of other PLC devices, responses received from two PLC devices complying with differing PLC communication standards, directs the two PLC devices to transmit communications according to respective differing PLC communication standards in an attempt to avoid PLC communication conflicts. The differing PLC communication standards may include a HomePlug communication standard and an ITU home networking (G.hn) communication standard. The PLC device may convert communications between the differing PLC communication standards.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Jose Abad Molina, Jonathan Ephraim David Hurwitz
  • Patent number: 8749638
    Abstract: The present invention discloses an apparatus, a method and a computer program for mapping and allocating available television white space channels for a terminal requesting resources. The mapping is based on the data of available overlapping TV white space channels within a geographical tracking area and coexistence with other cellular secondary systems within the area. Furthermore, a location for a moving mode II device may be tracked periodically. The geo-location accuracy of the mode II device affects the TV white space resources which can be allocated to the device.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Gilles Charbit, Samuli Turtinen, Sami-Jukka Hakola, Timo Koskela
  • Patent number: 8750236
    Abstract: Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Patent number: 8750813
    Abstract: A transmitter RF front-end integrated on a single substrate is enabled to determine whether associated IF amplification stage provides a required transmission gain for transmitting an output signal of an application. A dedicated power amplifier driver within the transmitter RF front-end is configured to provide additional gain, when needed based on the determination, to meet the required transmission gain for transmitting the output signal. The associated IF amplification stage comprises an upconversion mixer and a lowpass filter (LPF). The upconversion mixer may be implemented as an active mixer or a passive mixer. The upconversion mixer and the dedicated power amplifier driver are enabled to operate in 2.44 gigahertz. A maximum gain provided by the associated intermediate frequency (IF) amplification stage for transmitting the output signal is determined to decide the additional gain provided by the dedicated power amplifier driver by comparing with the required transmission gain.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventor: Meng-An Pan
  • Patent number: 8751880
    Abstract: A method and a system for accurately calculating the timing margin in a clock and data recovery system (CDR) is provided that utilizes a singular path environment of hardware. The method entails adding an amount of jitter within the CDR to change the receiver phase. The amount of jitter is incrementally increased until a threshold level of bit errors occur. Based on the amount of jitter needed to cause the threshold level of bit errors, timing margin can be calculated.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Magesh Valliappan, Lin Zheng, Bruce Howard Conway
  • Patent number: 8751899
    Abstract: Handling burst error events with interleaved Reed-Solomon (RS) codes. A received signal, that has undergone convolutional interleaving sometime before, is received from a burst noise affected communication channel. The signal undergoes convolutional deinterleaving and the codewords generated there from undergo appropriate successive cyclic shifting to arrange burst noise affected symbols of various codewords into at least some common symbol locations. For example, at least two codewords have burst noise affected symbols in common symbol locations. An ensemble decoder jointly decodes multiple codewords during a same time period (i.e., processes multiple codewords simultaneously). By processing multiple codewords simultaneously, the ensemble decoder has greater error correction capability than a decoder that processes a single codeword at a time.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventor: Thomas J. Kolze
  • Patent number: 8750879
    Abstract: A system and method for utilizing multiple communication pathways for communication hand-off (e.g., in a MIMO system). Various aspects of the present invention may comprise an access point communicating with a communication system utilizing a first number of transceivers. After determining to perform a hand-off of the communication system to a second access point, simultaneously, a second number of communication system transceivers may be utilized to communicate with the first access point and a third number of communication system transceivers may be utilized to communicate with the second access point. Various aspects of the present invention may also comprise an access point initially communicating with a communication system utilizing a first number of transceivers. After determining to hand-off the communication system, the access point may communicate with the communication system utilizing a second number of transceivers that is different from the first number of transceivers.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
  • Patent number: 8751220
    Abstract: Various embodiments of multiple microphone based pitch detection are provided. In one embodiment, a method includes obtaining a primary signal and a secondary signal associated with multiple microphones. A pitch value is determined based at least in part upon a level difference between the primary and secondary signals. In another embodiment, a system includes a plurality of microphones configured to provide a primary signal and a secondary signal. A level difference detector is configured to determine a level difference between the primary and secondary signals and a pitch identifier is configured to clip the primary and secondary signals based at least in part upon the level difference. In another embodiment, a method determines the presence of voice activity based upon a pitch prediction gain variation that is determined based at least in part upon a pitch lag.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Xianxian Zhang, Alfonsus Lunardhi
  • Patent number: 8750360
    Abstract: A mobile device comprises multiple receive antennas to receive spatially independent multipath signals from multiple transmit antennas located on a single base station. The mobile device concurrently generates a RAKE-based equivalent single path signal (RAKE ESPS) and an equalizer-based equivalent single path signal (equalizer ESPS) for the multipath signals received via each receive antenna. The generated RAKE ESPS or the generated equalizer ESPS is selected for channel decoding. Reference signal components are extracted from the multipath signals received to determine noise components, which is used to determine signal quality information of the generated RAKE ESPS and the generated equalizer ESPS. A final ESPS is selected from the generated RAKE ESPS and the generated equalizer ESPS based on the corresponding determined signal quality information. The selected final ESPS is diversity processed by combining signal components over the transmit/receive antennas.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Vinko Erceg
  • Patent number: 8750414
    Abstract: Aspects of a method and system for polar modulation with discontinuous phase are provided. In this regard, in-phase and quadrature-phase components may be generated from a modulated baseband signal, and the signal components may be utilized to generate a signal representative of the amplitude of the baseband signal. Furthermore, the signal components may be pulse shaped and the pulse-shaped components may be divided by the signal representative of the amplitude of the baseband signal. The resulting signals may be up-converted to RF, summed, and amplified, where the amplification may be controlled via a quantized representation of the signal representative of the amplitude of the baseband signal. In this regard, one or more bias points, and/or one or more binary weighted current sources coupled to one or more power amplifiers may be controlled. The pulse-shaping may comprise passing the signal components through a raised cosine filter.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8749011
    Abstract: In one embodiment, a die arrangement is disclosed in which a wire-bond pad may be operatively coupled to a power supply via a wire bond. A first pad may be operatively coupled to the wire-bond pad. A second pad may be operatively coupled to the first pad via a redistribution layer.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Matthew Kaufmann, Morteza Cyrus Afghahi
  • Patent number: 8750925
    Abstract: An integrated circuit (IC) includes a baseband processing module, a GPS receiver, and an RF section. The baseband processing module is coupled to process voice signals and data signals. The global positioning satellite (GPS) receiver module is coupled to process GPS signals. The radio frequency (RF) section id coupled to: transceive the voice signals as RF voice signals; transceive the data signals as RF data signals; and convert GPS RF signals into the GPS signals.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8749410
    Abstract: A multi-lane analog-to-digital converter (ADC) is disclosed that is capable of compensating for one or more of its impairments such that its digital output accurately represents its analog input. The multi-lane ADC can compensate for unwanted phase offsets between multiple phases of a sampling clock used by the multi-lane ADC, unwanted bandwidth mismatches between lanes in the multi-lane ADC, and/or unwanted gain mismatches between the lanes in the multi-lane ADC to provide some examples.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Frank Van Der Goes, Christopher Ward, Klaas Bult
  • Patent number: 8749607
    Abstract: A video conferencing device, which includes a processor, a memory, and a interface configured to receive a video stream having a plurality of objects. The video conferencing device also includes an object selector configured to select a region surrounding a first object in the plurality of objects in the video stream, wherein the first object has abnormal characteristics when compared to a second object, a transformation generator configure to create a transformation, and a transformation module configured to apply the transformation to the video stream to create a transformed video stream, in which the first object appears in a manner more consistent with the second object.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventor: Ilia Vitsnudel
  • Patent number: 8750783
    Abstract: A fixed or Mode II device enables a Mode I device for license exempt operation by providing to it a list of available license exempt radio channels and a parameter indicating an interval at which contact verification signals CVSs are to be sent. The CVSs verify whether the list remains valid. The fixed/Mode II device then repeatedly sends contact verification signals spaced in time from one another according to the interval. In various embodiments the parameter may be an explicit indication (number of seconds or number of beacons between consecutive CVSs), or it may be implicit (derived from an ID of the fixed/Mode II or Mode I device or a frequency channel, in which the relevant ID is the parameter). A plurality of enabled Mode I devices each gets a device-specific list, and in one embodiment the interval is the same for each of them and the explicit indication is broadcast while in another the parameter is provided to each of them via unicast messages and the interval may differ.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Timo K. Koskela, Sami-Jukka Hakola, Anna Pantelidou, Samuli Turtinen
  • Patent number: 8750319
    Abstract: A data bridge controls the transfer of packets between different priority network fabrics of a closed network, e.g. high and low priority network fabrics a vehicular network. Processing circuitry determines first priority routing of a first packet from the first network fabric to the second network fabric based on packet content type of the first packet and priority conditions of the second network fabric. A determination is also made regarding whether a second packet is to be delivered from the second network fabric to the first network fabric. If the second packet is to be delivered, second priority routing of the second packet is made based on packet content type of the second packet and priority conditions of the first network fabric.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Nariman Yousefi, Yongbum Kim, John Walley, Sherman (Xuemin) Chen, Wael W. Diab, Nicholas Ilyadis
  • Patent number: 8749318
    Abstract: Enhanced polar modulator for transmitter. Within a phase locked loop (PLL), two point modulation topology is employed in which phase information passes through a limiter (e.g., a ±90° or ±?/2), the phase information dynamic range is divided by a factor (e.g., by 2), and a maximum frequency deviation is also divided by a factor (e.g., by 2). Then, a double balanced up-converter mixer/modulator performs gain adjustment (e.g., magnitude and/or amplitude adjustment) and phase changes of 0° and +180° or 0 and +? (e.g., negative gains values may be employed). Phase adjustment in such an architecture is split and provided to both the PLL and to the mixer/modulator of such a polar modulator within a transmitter module such as may be implemented within a communication device (e.g., which may be a wireless communication device). This architecture that includes a PLL with a double balanced up-converter mixer/modulator suppresses even harmonics.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Sofoklis Plevridis, Theodoros Georgantas, Konstantinos D. Vavelidis
  • Patent number: 8750944
    Abstract: In relation to wireless communication, a communications apparatus suitable for installation into a vehicle provides a user-driven communication capability in a vehicle communications system. The apparatus includes means providing a wide-area communication capability, at least one antenna interface for conveying signals to and/or from at least one antenna providing wide-area communication, at least one power input configured to receive operating power for the apparatus from a vehicle and at least one digital communication interface for providing connectivity to a master unit of the vehicle.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Seppo Rousu, Yrjo Kaipainen, Kim Kaltiokallio, Jonne Soininen