Patents Assigned to Broadcom
  • Publication number: 20150009059
    Abstract: A system includes a pipeline analog-to-digital converter as a first stage to process an input signal, and a successive approximation register (SAR) analog-to-digital converter as a second stage to process the input signal. The SAR analog-to-digital converter includes a power adjustment element to adjust a reference voltage of the SAR analog-to-digital converter to match a full scale voltage of the pipeline-analog-to-digital converter.
    Type: Application
    Filed: September 9, 2013
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventors: Chun-Ying Chen, Wei-Ta Shih, Rong Wu, Young Shin, Karthik Raviprakash, Tao Wang, Chia-Jen Hsu, Tianwei Li
  • Publication number: 20150008982
    Abstract: Techniques are described herein that adaptively suppress harmonic distortion in an amplifier utilizing negative gain. The amplifier includes a first amplifier stage and a second amplifier stage, which are coupled in parallel. The first amplifier stage has a positive gain. The second amplifier stage has a negative gain to suppress total harmonic distortion of a system that includes the amplifier. The amplifier further includes shunt-peaking circuitry coupled to the first amplifier stage and the second amplifier stage to increase a maximum operating frequency at which the amplifier is capable of operating.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventors: Kuo-J Huang, Delong Cui, Jun Cao, Afshin Doctor Momtaz, Iuri Mehr, Ramon Alejandro Gomez
  • Publication number: 20150012936
    Abstract: Secure functions may be accessed via an authentication process utilizing a password that may be generated within a chip integrated on a device. The password may be unique per chip location, per challenge and/or per chip. The location of the chip may be determined based on GPS information and securely stored and securely communicated to an external entity. Two or more of the chip location, a generated random number sample and a key from a table of keys may be passed to a hash function that may generate a password. An external entity attempting access may be challenged to respond with a password that matches the password generated by the hash function. The response may be compared with the password generated by the hash function and access to one or more secure functions may be granted based on the comparison.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventor: Xuemin CHEN
  • Publication number: 20150012615
    Abstract: A system includes one or more network media service devices, with each network media node operably connected upstream to one or more gateway devices. At least one of the network media service devices is configured to intercept an ABR-related request to receive digital media content for a media channel sent from a client set top box to a remote ABR server located upstream from the at least one network media device, identify a second gateway device that is storing the digital media content, the second gateway device having previously received the digital media content from the remote ABR server, and return a network address of the second gateway device to the client set top box for use by the client set top box to receive the digital media content from the second gateway device. In various implementations, the network address is returned in connection with an HTTP response indicating a redirection to the network address.
    Type: Application
    Filed: August 6, 2013
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventors: Yong LI, Xuemin Chen
  • Publication number: 20150009966
    Abstract: A wireless access point includes a wireless transceiver configured to provide coordinated multipoint communications with at least one non-legacy device of a plurality of remote devices via a wireless local area network protocol. The coordinated multipoint communications are coordinated with at least one other wireless access point in accordance with coordination data.
    Type: Application
    Filed: April 25, 2014
    Publication date: January 8, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Dae Won Lee, Sirikiat Lek Ariyavisitakul
  • Publication number: 20150009836
    Abstract: In MIMO systems employing closed loop link adaptation, channel state information reporting can be enhanced using various types of side information, such as scheduling information indicating constraints on the scheduler related to the generation of downlink MIMO signals.
    Type: Application
    Filed: July 31, 2013
    Publication date: January 8, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Djordje Tujkovic, Gowrisankar Somichetty, Mrinmoy Jana, Sriram Rajagopal
  • Publication number: 20150011162
    Abstract: A system, method, and apparatus for negotiating a communication link between first and second near field communication (NFC) devices is disclosed. A third NFC device is placed in close proximity with a first host device operatively containing the first NFC device to determine communication information including at least one of a communication mechanism and a data transfer protocol usable by the first host device. The communication information usable by the first host device is stored in a portable device operatively containing the third NFC device. The third NFC device is momentarily placed in close proximity with the second NFC device. The stored communication information of the first host device is transferred from the portable device to a second host device operatively containing the second NFC device.
    Type: Application
    Filed: September 26, 2014
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventors: Mohamed AWAD, Brima IBRAHIM, John WATERS
  • Publication number: 20150009403
    Abstract: A system for transcoding locally cached content may include a memory configured to store at least a video stream. A controller communicatively coupled to the memory may be configured to determine a video definition format of a requested video stream and compare the requested video stream with a video definition format of a cached version of the requested video stream. A transcoder coupled to the controller may be configured to convert the cached version of the requested video stream to a lower video definition format if the video definition format of the cached version is determined to be higher than the video definition format of the requested video stream. If the video definition format of the requested video stream is same as the video definition format of the cached version, the controller may supply the requested video stream using the cached version stored in the memory without transcoding.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventors: Yong LI, Xuemin CHEN
  • Publication number: 20150012707
    Abstract: A system for layered local caching of downstream shared media in a hierarchical tree network arrangement includes a first network node on a first distribution network having a first caching controller. The first network node configured to store a video segment transmitted on the first distribution network based on a first instruction received by the first caching controller from a central caching controller communicatively coupled to the first distribution network. The central caching controller is located upstream from the first network node. The system includes a second network node on a second distribution network having a second caching controller and communicatively coupled to the first network node. The second network node configured to store a video segment transmitted on the second distribution network based on a second instruction received by the second caching controller from the first caching controller.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 8, 2015
    Applicant: Broadcom Corporation
    Inventors: Yong LI, Xuemin CHEN
  • Patent number: 8929544
    Abstract: A method and system for secure and scalable key management for cryptographic processing of data is described herein. In the method, a General Purpose Cryptographic Engine (GPE) receives key material via a secure channel from a key server and stores the received Key encryption keys (KEKs) and/or plain text keys in a secure key cache. When a request is received from a host to cryptographically process a block of data, the requesting entity is authenticated using an authentication tag included in the request. The GPE retrieves a plaintext key or generate a plaintext using a KEK if the authentication is successful, cryptographically processes the data using the plaintext key and transmits the processed data. The system includes a key server that securely provides encrypted keys and/or key handles to a host and key encryption keys and/or plaintext keys to the GPE.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Mark Buer, Zheng Qi
  • Patent number: 8929808
    Abstract: A power amplifier, supplied by a supply voltage, to drive an antenna to output a magnetic field, comprising a differential stage configured to output an output signal to drive the antenna, and a feedback stage configured to receive a common mode output voltage from the differential stage and to output a feedback voltage to regulate the output common mode signal to be proportional to the supply.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Bojko Marholev, Aminghasem Safarian
  • Patent number: 8929902
    Abstract: A method, apparatus and computer program product are therefore provided according to an example embodiment to provide a cellular based ITS environment. In this regard, a method includes causing a secondary cell carrier (SCC) to be configured for a mobile terminal located in a vehicular target area. The method of this embodiment may also include causing the SCC to be activated by signaling a vehicular fast activation block (VFAB). The method of this embodiment may also include causing the SCC to deactivate based on a signal strength measurement, received from a road side unit (RSU), in an instance in which the signal strength measurement does not satisfy a predetermined threshold over a measurement period based on a timer.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Gilles Charbit, Matti Kullervo Jokimies
  • Patent number: 8929211
    Abstract: Methods and apparatus for swapping functionality modes of a network data link are disclosed. An example method includes, in a network device, supporting a plurality of active network data links that includes a given network data link, where the given network data link is operated in accordance with a first mode of functionality.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Kiran Dasoju, Jeff Dull
  • Patent number: 8929835
    Abstract: A non-intrusive and operational communication system monitoring and diagnostics. Loopback-type testing is facilitated through testing that is split between transmit and receive sections. Transmit testing on a port can be based on test packets that are removed from the transmission path by a PHY upon detection. Receive testing on a port can be based on live traffic packets.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventor: Wael William Diab
  • Patent number: 8929943
    Abstract: A system and method in a mobile communication device for providing assistance to a user in determining a communication pathway. A system may comprise processor-executable instructions, that when executed by a processor, cause a mobile communication device that supports a communication type over multiple networks to access availability information stored in a remote database for determining available networks among the multiple networks for performing the communication type, determine the available networks using the availability information, provide user assistance for determining a selected network among the available networks for the communication type, and perform the communication type using the selected network.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventor: Jeyhan Karaoguz
  • Patent number: 8930664
    Abstract: Data is written from a first domain to a FIFO memory buffer in a second domain. The first domain uses a first clock signal, the second domain uses a second clock signal and the memory buffer uses the first clock signal that is delivered alongside the data. The data is read from the memory buffer using the second clock signal. A read pointer is adjusted and synchronised with the delivered first clock signal. A token is generated using the delivered first clock signal, based on the read pointer. The token represents a capacity of the memory buffer having been made available. The token is passed to the first domain and synchronised with the first clock signal. The writing of data to the memory buffer is controlled based on a comparison between the synchronised token and a previously received token.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Ari Tapani Kulmala, Jaakko Illmari Sertamo
  • Patent number: 8928355
    Abstract: There is presented a high bandwidth circuit for high-speed transceivers. The circuit may comprise an amplifier combining capacitor splitting, inductance tree structures, and various bandwidth extension techniques such as shunt peaking, series peaking, and T-coil peaking to support data rates of 45 Gbs/s and above while reducing data jitter. The inductance elements of the inductance tree structures may also comprise high impedance transmission lines, simplifying implementation. Additionally, the readily identifiable metal structures of inductors and t-coils, the equal partitioning of the load capacitors, and the symmetrical inductance tree structures may simplify transceiver implementation for, but not limited to, a clock data recovery circuit.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Delong Cui, Afshin Momtaz, Jun Cao
  • Patent number: 8928804
    Abstract: Disclosed are various embodiments directed to transcoding a bit stream in parallel. A bit stream may be divided into a plurality of segments, where a plurality of transcoders encode at least a portion of the segments in parallel. If encoding is performed using variable bit rate (BR) encoding, each encoder may encode a segment and vary a BR for the segment. A measured average BR is compared with a target average BR to determine whether to adjust a video quality level (VQL) or any other encoder parameter. A relatively constant subjective quality may be maintained using variable BR encoding while achieving a target average BR. When using constant BR encoding, a VQL or other encoder parameter is used by encoders to achieve relatively constant subjective quality. For example, a relatively continuous quantization parameter between adjacent encoded segments may be achieved.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Alexander Garland MacInnis, Hongtao Zhu, Jason William Herrick, Brian Francis Schoner, Junlin Li
  • Patent number: 8928808
    Abstract: A method for seamless transition between interlaced and progressive video profiles may include receiving at a video feeder a stream of video signals for displaying on a display device. The stream of video signals may include segments of one of interlaced fields or progressive video frames. During an interlaced stream, the interlaced fields may be directed to a deinterlacer, and an output of the deinterlacer may be directed to the display device. The output of the deinterlacer may be determined based on previously received interlaced fields from the video feeder. During a transition to a progressive stream, the progressive video frames may be directed to a frame store, and the output of the deinterlacer may be directed to the display device. During a progressive stream, the progressive video frames may be directed to the frame store, and previously stored frames may be directed to the display device.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventors: Richard Hayden Wyman, Jaewon Shin
  • Patent number: 8930534
    Abstract: A time limit may be determined for energy efficient networking (EEN) sleep intervals based on end-to-end sleep interval limitations. The time limit may be communicated to other network devices which may limit their sleep time. End-to-end sleep interval limitation information may be received via a user input, packet header information, a standardized and/or non-standardized network management protocol, AVB, SRP, RSVP and SNMP. The EEN sleep interval time limit may be determined based on a number of hops between endpoint devices. Packets may be inspected to determine a packet data type and/or end-to-end sleep interval limitation information. The time limit may be determined based on latency requirements of data streams. A time limit for a port may be determined based on sleep time limits for data streams communicated via the port. The time limits may be statically and/or dynamically configured. The network device may be configured via a network management interface.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: January 6, 2015
    Assignee: Broadcom Corporation
    Inventor: Wael William Diab