Patents Assigned to Broadcom
  • Patent number: 8731508
    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: December 3, 2012
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventor: Jeyhan Karaoguz
  • Patent number: 8731073
    Abstract: Methods, systems, and apparatuses are described for aligning lanes of low speed serial links coupled to a transceiver. The transceiver cooperatively performs lane alignment operations with a low speed device during initialization of the transceiver and the low speed device. The lane alignment operations are performed in-band using the low speed serial links, and therefore, do not require additional out-of-band-signaling wires between the transceiver and the low speed device to perform the lane alignment operations. The lane alignment operations may be performed by a handshaking process performed by the transceiver and the low speed device, where the transceiver and the low speed device provide training pattern(s) of data that are used to align the low speed serial links. The low speed serial links are continuously monitored after initialization is complete to detect various transient impairments and to re-initiate lane alignment operations in response to detecting such impairments.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventor: Whay Sing Lee
  • Patent number: 8731001
    Abstract: Systems and techniques for communication using coordinated multi-point transmission. In one embodiment, an apparatus comprises at least one processor and a memory storing a set of computer instructions. The processor is configured to cause the apparatus to receive information relating to a propagation delay variation between at least a first transmission and a second transmission received at a user equipment. The first transmission is received from a first transmission point and the second transmission is received from a second transmission. The information relating to the propagation delay variation is evaluated and, based on the result of the evaluation, a determination is made as to whether the second transmission point is acceptable as a participant in a cooperative multi-point joint processing transmission to the user equipment.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Timo E. Roman, Tommi T. Koivisto, Mihai Enescu, Karol Schober
  • Patent number: 8731913
    Abstract: A method for overlap-adding signals useful for performing frame loss concealment (FLC) in an audio decoder as well as in other applications. The method uses a dynamic mix of windows to overlap two signals whose normalized cross-correlation may vary from zero to one. If the overlapping signals are decomposed into a correlated component and an uncorrelated component, they are overlap-added separately using the appropriate window, and then added together. If the overlapping signals are not decomposed, a weighted mix of windows is used. The mix is determined by a measure estimating the amount of cross-correlation between overlapping signals, or the relative amount of correlated to uncorrelated signals.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Robert W. Zopf, Juin-Hwey Chen
  • Patent number: 8730295
    Abstract: Methods, systems, and computer program products for enhancing transmitted audio signals for a video conference call are disclosed. Facial recognition technology and audio processing techniques determine a position of a speaking member of a party on a video conference. Based on the determined position of the speaking member, the directionality of the received audio signals can be adjusted towards the speaking member. The video conference system can transmit the adjusted audio signals.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Tommy Kee, Wilfrid LeBlanc
  • Patent number: 8731113
    Abstract: In addition, to pilot tones which may be existent within an orthogonal frequency division multiplexing (OFDM) signal, one or more data tones within that same signal may be employed to assist with channel estimation (alternatively, detection). Once a data tone qualifies as a pseudo-pilot tone, it may be used with the pilot tones for channel estimation. A qualifier considers slicer error associated with hard decisions for a data tone to determine if it is a candidate for assistance within channel estimation. A frame within an OFDM signal may, in one situation, include no pilot tones at all, and a previously calculated channel estimate may be used to process that frame. In addition, fewer pilot tones than needed to perform accurate channel estimation (based on the channel delay spread) may be employed by using one or more pseudo-pilot tones (e.g., qualified data tones).
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventor: Thomas J. Kolze
  • Patent number: 8730935
    Abstract: Aspects of a method and system for Bluetooth connection setup in a multi-standard multi-radio communication system are provided. In this regard, a Bluetooth system may be operable to determine whether a coexistent time division multiplexing communication system is receiving signals and to control the types of packets it transmits based on the determination. While the coexistent time division multiplexing communication system is receiving signals, the Bluetooth system may be limited to transmission of Bluetooth packets that enable establishment of a Bluetooth connection. For example the Bluetooth system may be limited to sending ID packets in response to page packets and FHS packets and/or may be limited to sending FHS packets. Also, the Bluetooth system may refrain from transmitting packets while the Bluetooth system is connected as a piconet master and while the time division multiplexing communication system is receiving.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventor: Steven Hall
  • Patent number: 8731378
    Abstract: A system, method, and apparatus for playback of multiple video elementary streams is presented herein. A host processor modifies the video elementary streams to allow a transport demultiplexer to distinguish among the plurality of the video elementary streams.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Girish Hulmani, Arul Thangaraj, Sandeep Bhatia
  • Patent number: 8731604
    Abstract: An integrated circuit (IC) includes a first processing module that converts inbound data into an inbound digital audio signal and converts an outbound digital audio signal into outbound data. A second processing module performs a user application that includes at least one of generating of an inbound analog audio signal and generating an outbound analog audio signal. A third processing module performs an operating system algorithm to coordinate operation of at least one user application.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Claude G. Hayek, Frederic Christian Marc Hayem, Vafa James Rakshani, Hooman Darabi
  • Patent number: 8732675
    Abstract: A system and method for analyzing the real-time performance of a communication device. An aspect of the present invention records information input to the communication device during real-time operation of the communication device. A playback device or module may execute a model of the communication device in a non-real-time environment according to the recorded real-time input information. System execution in the non-real-time playback environment may, therefore, be equivalent to the original operation of the communication device that occurred in real-time. Accordingly, situations that occur in real-time may be efficiently recreated in non-real-time playback. An operator may analyze the past real-time performance of the communication device using the playback device or module, the recorded real-time input information, and a debugger utility if desired, without conducting additional trials to reproduce the desired operational situation.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Haixiang Liang, Ilya Stomakhin, Mark Gonikberg, Yury Gonikberg
  • Patent number: 8732329
    Abstract: A media player implements an integrated parallel source download technology to receive a media file from streamed and segmented media file sources. A first source streams delivery of streamed media packets of the media file in sequential packet number order to the media player, while a second source provides segmented delivery of segmented media packets of the media file in random order to the media player. The media player combines the streamed media packets and the segmented media packets to produce the media file.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: James D. Bennett, Jeyhan Karaoguz
  • Patent number: 8730974
    Abstract: Network entities such as an access device and a gateway analyze messages exchanged during a communication session to identify information items of interest such as, for example, email addresses, universal resource locators, file paths, and attachments. References to and/or the contents of the identified information items may be stored in a database that associates the identified information items with the participants of the communication session. The participants in the communication session may be identified by conventional caller ID information, or by an Internet protocol address, an electronic serial number, or a variety of other identifiers. Information received at the beginning of a later communication session that identifies participant(s) in that communication session may then be used to select from the database, information items from previous communication session, that are associated with the identified participant in the current communication session.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Noel Whitley
  • Patent number: 8729742
    Abstract: An integrated circuit (IC) includes a first section having a sinking component sinking excessive current. A second section includes at least one sourcing component that, in operation, stores energy. A structure is provided to provide the stored energy from the at least one sourcing component to the sinking component, the stored energy being utilized by a load component included within the second section.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventor: Hao Hua
  • Patent number: 8730391
    Abstract: Determining video content type of a video displayed on a LCD and triggering adjustment in drive power of the LCD based on the video content type. The video content type indicates relative content motion of the video. A video content type detection module is one or combination of a software and a hardware and directs the LCD to be driven relative slower or faster based upon video content. The module independently or in conjunction with another module identifies an active window from a plurality of windows corresponding to a plurality of applications running on the host device and sets the drive power of the LCD based on speed of a video displayed on the active window. The module may also adapt LCD drive power based upon user input and/or remaining battery life.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 8732806
    Abstract: Aspects of a method and system for hardware enforced virtualization in an integrated circuit are provided. In this regard, a mode of operation of an integrated circuit may be controlled such that the integrated circuit alternates between a secure mode of operation and an open mode of operation. Various resources of the integrated circuit may be designated as open or secure, and secure resources may be made inaccessible while the integrated circuit operates in the open mode. Access to the secure resources may be controlled based on a configuration of one or more registers and/or switching elements. Resources designated as secure may comprise, for example, a one-time-programmable memory. The integrated circuit may comprise ROM and/or one-time-programmable memory that stores one or more instructions, wherein execution of the one or more instructions may control transitions between the secure mode and the open mode.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: John Markey, Love Kothari, Paul Chou
  • Patent number: 8730930
    Abstract: Polling using B-ACK for occasional back-channel traffic in VoWIFI applications. Within wireless communication systems having a relatively asymmetric channel (e.g., relative more downstream traffic than upstream), certain upstream communications (e.g., acknowledgments (ACKs) and/or block acknowledgments (B-ACKs)) include indication therein (e.g., piggybacked therein) that a given downstream located communication device desires/needs to make upstream communication. In some instances, specificity is also provided therein to indicate the type of information to be transmitted upstream. Such a communication protocol mitigates (or eliminates) contention between upstream and downstream traffic in an environment with significantly more downstream traffic (e.g., such as ongoing downstream traffic that may include streaming video). A coordinating device (e.g.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Peyush Agarwal, Joachim S. Hammerschmidt, Yasantha N. Rajakarunanayake, Praveen K. Gopala, George Kondylis
  • Patent number: 8730798
    Abstract: Apparatus and methods for transmitting information over a home coax network. The apparatus and methods may involve a physical layer frequency domain signal preprocessor and a physical layer time domain signal transmitter. The transmitter may be configured to receive the signal from the preprocessor and transmit the signal over coax that is in radiofrequency communication with a plurality of network nodes, the transmitter having a first transmission channel and a second transmission channel. The signal may be received by a receiver on the network. The receiver may have a MAC-to-PHY interface that is configured to receive signals from single-transmission-channel transmitters.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Avi Kliger, Philippe Klein, Yitshak Ohana
  • Patent number: 8730982
    Abstract: A network device for processing data includes at least one ingress module for performing switching functions on incoming data, a memory management unit for storing the incoming data and at least one egress module for transmitting the incoming data to at least one egress port. The at least one egress module includes an egress scheduling module and multiple queues per each of the at least one egress port. Each of the multiple queues serve data attributable to a class of service, and the egress scheduling module is configured to service a minimum bandwidth requirement for each of the multiple queues and then to service the multiple queues to allow for transmission of a maximum allowable bandwidth through a weighting of each of the multiple queues.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Chien-Hsien Wu, Bruce Kwan, Philip Chen
  • Patent number: 8730302
    Abstract: A three-dimensional (3D) video rendering device monitors 3D effects associated with an object in a received 3D video image-by-image. The object may be re-located to a preferred location to adjust the associated 3D effects. Two-dimensional (2D) image data and corresponding depth information for the object at the current location are interpolated to the preferred location. A location difference and lighting condition changes corresponding to the re-location of the object are calculated to determine a view angle and lighting conditions for the object at the preferred location. 2D image data and depth information for the object at the preferred location are estimated based on the determined view angle and the determined lighting conditions for the object at the preferred location. The estimated 2D image data and the estimated corresponding depth information may be applied to the object at the preferred location to enhance the associated 3D effects for 3D video rendering.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Xuemin Chen, Nambi Seshadri, Jeyhan Karaoguz, Chris Boross
  • Patent number: 8730073
    Abstract: A method for digitizing an analog signal through a pipelined analog-to-digital converter (ADC) may include pipelining a sample sub-stage, a quantization sub-stage and an amplification sub-stage to an ADC lane. Within a first of multiple pipelined stages, clock phases may be assigned to the ADC lane, including a sample clock phase, a quantization clock phase, and an amplification clock phase such that the quantization clock phase is non-overlapping with the sample clock phase and the amplification clock phase. The non-overlapping feature may be facilitated by generating multiple reference clock phases for the sub-stages of multiple ADC lanes, and interleaving assignment of the sample clock phase, the quantization clock phase, and the amplification clock phase to the reference clock phases among the multiple lanes.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: May 20, 2014
    Assignee: Broadcom Corporation
    Inventors: Tao Wang, Chun-Ying Chen, Jiangfeng Wu