Patents Assigned to Broadcom
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Patent number: 8842740Abstract: Aspects of fast channel change of programs are presented. Initial pictures of a program may be decoded earlier and displayed longer than what is indicated by corresponding clock references. Additional pictures of the program may be decoded and displayed at time indicated by the clock references. Within the time period of the initial pictures, decoding timing advances of initial pictures may be reduced and corresponding picture displaying rates may converge to an intended constant frame rate used for additional pictures displaying. Pictures may be decoded and displayed when the corresponding data are available in a coded data buffer (CDB) and a decoded picture buffer (DPB), respectively. Depending on the implementation, the respective previous picture may be displayed when a decoded picture is available in the DPB.Type: GrantFiled: June 12, 2013Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Wade Wan
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Patent number: 8841963Abstract: Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-linearities in the signal. By isolating the switches from the signal path linearity of the PGA can be improved.Type: GrantFiled: February 2, 2006Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Arya R. Behzad, Klaas Bult, Ramon A. Gomez, Chi-Hung Lin, Tom W. Kwan, Oscar E. Agazzi, John L. Creigh, Mehdi Hatamian, David E. Kruse, Arthur Abnous, Henry Samueli
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Patent number: 8842624Abstract: Provided is operation of a device in a plurality of frequency bands. A packet based network selects a frequency band of operation by determining a quality indicator. The WLAN further selects a communication protocol. WLAN devices include a baseband processor interface and a first radio for receiving the digital data and for transmitting RF signals in first and second frequency bands of a plurality of frequency bands, and for producing corresponding digital data to the baseband processor interface.Type: GrantFiled: June 8, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Jason A. Trachewsky
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Patent number: 8842741Abstract: In a video processing device, scale of a video image is detected for vertical and horizontal directions based on pixel information, for example, per pixel vertical and horizontal gradients. Gradients are utilized or discarded based on picture format, standard deviation of luma levels and pixel location relative to black border edges, graphics and/or overlaid content. Mosquito noise filters are adapted based on scale and/or noise strength. Median and/or linear filter results are selected based on a weakest, a strongest and/or a blended result. Horizontal and vertical operations are performed separately for edge detection, edge strength determination, filtering and filter correction control. Horizontal and vertical block grid spacing and grid shift are determined. Block noise strength is determined. Block noise filters are configured based on scaling and/or noise strength. Filter corrections are limited based on block noise strength. Noise reduction results may be blended to generate a pixel correction value.Type: GrantFiled: December 22, 2010Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Brian Schoner, Jaewon Shin, Olivier Francois Joseph Harel, Advait Madhav Mogre, Hyeong-Seok Victor Ha
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Patent number: 8842545Abstract: A system and method for determining an information communication path based on energy requirements. Various aspects of the present invention provide a method that comprises identifying a plurality of information communication paths that may be utilized to communicate information (e.g., one or more units of information). A communication path identification module may perform such identification. Respective amounts of energy to communicate the information may be estimated for at least a portion of the identified plurality of information communication paths. A communication energy estimation module may perform such estimation. An information communication path may be selected from the identified plurality of information communication paths based, at least in part, on the estimated respective amounts of energy. A communication path selection module may perform such selection.Type: GrantFiled: September 13, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
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Patent number: 8843097Abstract: Methods and systems for blocker attenuation using multiple receive antennas are disclosed. In this regard, a plurality of signals may be received via a corresponding plurality of antennas and a corresponding plurality of interference-suppressed signals may be generated. The interference-suppressed signals may be generated by adjusting a gain and phase of the plurality of received signals to generate a corresponding plurality of adjusted signals, and combining the corresponding plurality of adjusted signals, respectively, with the plurality of received. The gain of the received signals may be adjusted based on a wide bandwidth signal strength measurement and a narrow bandwidth signal strength measurement. A center frequency of one or more of the plurality of antennas may be adjusted based on received signals strength measurements. A gain and/or phase adjustment of each one of said received signals may be independent of gain and/or phase adjustments of other ones of the receive signals.Type: GrantFiled: March 15, 2011Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Ahmadreza Rofougaran
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Patent number: 8843182Abstract: A communication device may select a communication path to check for pending messages in a multiple network environment. The communication device may exit from a power-saving operating mode during which the communication device does not receive messages from a message server. After exiting the power-saving operating mode, the communication device may identify multiple different communication paths. The multiple communication paths may include different communication networks in the multiple network environment. The communication device may determine a selected communication path from among the multiple communication paths and communicate with a message server across the selected communication path to check for messages.Type: GrantFiled: July 10, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
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Patent number: 8843675Abstract: A method and system to transfer data from one or more data sources to one or more data sinks using a pipelined buffer interconnect fabric is described.Type: GrantFiled: October 5, 2007Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Scott Krig
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Patent number: 8843678Abstract: Aspects of a method and apparatus for a configurable connector for Ethernet are provided. In this regard, a configurable Ethernet connector residing in an Ethernet enabled communication device may couple the communication devise to one or more twisted pairs and enable communication of Ethernet frames over the twisted pair(s). Conductors of each of the twisted pairs may make contact with adjacent pins of the configurable Ethernet connector. A size and shape of the configurable Ethernet connector may enable housing of more than 48 instances of the configurable Ethernet connector in a single standard size one rack unit face plate of a 19-inch rack. The configurable Ethernet connector may provide mechanical and electrical indications that enable a device coupled to the configurable Ethernet connector to determine configuration information of the configurable Ethernet connector. The information may indicate presence or absence of various components within and/or on the configurable Ethernet connector.Type: GrantFiled: March 26, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Wael William Diab, Kevin Brown, Michael Johas Teener
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Patent number: 8843765Abstract: A device generates a content key that depends upon device security state information. For example, the device may retrieve a first content key and a security state, and then derive a content key using the first content key and the security state. Accordingly, if the security state is incorrect, then the generated content key is incorrect, and the device cannot decrypt content provided to the device.Type: GrantFiled: October 10, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Andrew Dellow
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Patent number: 8843061Abstract: Methods and systems for power transfer utilizing leaky wave antennas (LWAs) are disclosed and may include configuring one or more LWAs in a communication device to receive RF signals that are communicated from one or more other LWAs that are external to the communication device. The communication device may be powered utilizing the RF signals that are received via the configured LWAs. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. The LWAs may be configured to receive the RF signals from a desired direction. The LWAs may comprise microstrip or coplanar waveguides, wherein a cavity height of the LWAs is dependent on spacing between conductive lines in the waveguides. The LWAs may be integrated in integrated circuits, integrated circuit packages, and/or printed circuit boards. The packages may be affixed to printed circuit boards and the integrated circuits may be flip-chip-bonded to the packages.Type: GrantFiled: June 9, 2010Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Ahmadreza Rofougaran, Maryam Rofougaran
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Patent number: 8842658Abstract: Disclosed are various embodiments for cancellation of a PSCH signal and/or SSCH signal from an RX input signal. A PSCH sequence and SSCH sequence are extracted a PSCH and SSCH signal. A relative gain associated with the PSCH signal and SSCH signal are determined relative to a CPICH signal. A reconstructed PSCH and SSCH signal are generated and cancelled from the RX input signal.Type: GrantFiled: March 23, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Hongwei Kong, Wei Luo, Li Fung Chang
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Patent number: 8843094Abstract: Aspects of a method and system for integrated blocker detection and automatic gain control are provided. In this regard, a communication device may generate one or more first signal strength indications based on a strength of a received signal at a first point in the analog front-end of the communication device. The communication device may generate one or more second signal strength indications based on a strength of the received signal at a second point in a digital processing module of the communication device. The first point in the analog front-end may be an input or an output of a down-conversion mixer. The second point in the digital processing module may be an output of an analog-to-digital converter or an output of a channel selection filter. The communication device may control, utilizing the first signal strength indication(s) and the second signal strength indication(s), a gain of one or more components of the communication device.Type: GrantFiled: August 9, 2010Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Walid Ahmed, John Leung, Theodoros Georgantas, Morten Damgaard, Nelson Sollenberger
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Patent number: 8842175Abstract: A system and method that provide reduced latency in a video signal processing system. Various aspects of the present invention may comprise receiving a current request from a user for first video information. Such a request may, for example, be received with a user interface module. A first video stream and a second video stream may be received simultaneously, where the first video stream comprises the first video information currently requested by the user, and the second video stream comprises second video information not currently requested by the user. A video receiver module may, for example, perform such receiving. The first video stream may be processed to present the first video information to the user at the current time. Further, the second video stream may be pre-processed in preparation for being presented to the user in the future. A video processing module may, for example, perform such video stream processing.Type: GrantFiled: January 28, 2005Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Alexander G. MacInnis
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Patent number: 8841968Abstract: An envelope detector (ED) includes a voltage-mode ED core including parallel detection transistors for detecting a voltage envelope of a radio frequency (RF) signal input, the RF signal input including an output of a radio such as a cellular transmitter (TX). The ED further includes multiple voltage amplifiers positioned serially in gain stages between the TX output and the ED core to provide a total linear voltage range of the envelope detector. A final voltage amplifier of the multiple voltage amplifiers drives the ED core and includes a class-AB RF amplifier configured to operate within a full linear voltage range of the ED core.Type: GrantFiled: September 26, 2012Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Amir Hadji-Abdolhamid, Janice Chiu
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Patent number: 8842760Abstract: A spatial multiplexing scheduler in, for example, an eNB or other base station, determines rank n precoders for UEs. Each UE reports the preferred precoder from this set of rank n precoders. The preferred precoder results in imbalance in performance over m layers compared to the rest of (n?m) layers. The UEs also report channel quality to the eNB, from which the eNB determines which layer(s) is better for the UE. For example, when n=2 and m=1, the eNB may then select two UEs such that, for the same precoder used by the UEs, the first UE has much higher layer 1 performance than layer 2, and the second UE has much higher layer 2 performance than layer 1. These two UEs may then share the same frequency-time domain resources, with the first UE information sent/received on layer 1, while the second UE information is sent/received on layer 2.Type: GrantFiled: March 5, 2013Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Sriram Rajagopal, Gowrisankar Somichetty
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Patent number: 8842851Abstract: Systems and methods are described that perform audio source localization in a manner that provides increased robustness and responsiveness in the presence of acoustic echo. The systems and methods calculate a difference between a signal level associated with one or more of the audio signals generated by a microphone array and an estimated level of acoustic echo associated with one or more of the audio signals. This information is then used to determine whether and/or how to perform audio source localization. For example, a controller may use the difference to determine whether or not to freeze an audio source localization module that operates on the audio signals. As another example, the audio source localization module may incorporate the difference (or the estimated level of acoustic echo used to calculate the difference) into the logic that is used to determine the location of a desired audio source.Type: GrantFiled: November 30, 2009Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventor: Franck Beaucoup
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Patent number: 8843583Abstract: An IP multimedia gateway (IMG) may be operable to identify a client device for which the IMG may not currently possess a capability to provide a particular service. The IMG may notify the client device that the IMG may not currently possess the capability to provide the particular service. The client device may be allowed to download and/or acquire information associated with the particular service. The client device may be allowed to receive the particular service based on the downloaded and/or acquired information. The client device may be local to the IMG and/or located remotely with respect to the IMG. The client device may be allowed to download stored content for the particular service when the IMG does not currently have an available channel or a channel of sufficient available bandwidth. The client device may be allowed to download an application to enable receiving of the particular service.Type: GrantFiled: July 1, 2010Date of Patent: September 23, 2014Assignee: Broadcom CorporationInventors: Xuemin Chen, Gordon Yong Li
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Publication number: 20140269847Abstract: Techniques are described herein that perform symbol-level equalization using multiple spreading factors. The techniques may allow for symbol-level equalization to be performed between a serving cell and a non-serving cell(s) for WCDMA and HSDPA protocols, for example. A serving cell operates using a first spreading factor, and a non-serving cell(s) operates using a second, different spreading factor. Data communications received from the serving cell and the non-serving cell(s) may be aligned using extended channel representation(s) of the non-serving cell(s) and/or scrambling code offset(s). The aligned communications may be equalized using symbol-level equalization to obtain a joint linear minimum mean square error between the serving cell and the non-serving cell(s).Type: ApplicationFiled: April 1, 2013Publication date: September 18, 2014Applicant: Broadcom CorporationInventor: Fu-Hsuan Chiu
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Publication number: 20140281099Abstract: This application relates to systems and methods for controlling the flow of transport layer packets (TLP) in a peripheral component interconnect express (PCIe)-based environment. In an exemplary embodiment, an arbiter in a PCIe device determines the amount of data, if any, that should be expected in response to transmission of a particular TLP. If a receive buffer of the PCIe device has enough available space for storing the expected data, the arbiter permits transmission of the particular TLP. If the receive buffer does not have enough available space for storing the expected data, the arbiter suppresses transmission of the particular TLP until the receive buffer has enough available space. The exemplary embodiment may improve data flow through the PCIe environment by reducing fragmented transfers of data.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: Broadcom CorporationInventors: Refeal AVEZ, Danny Kopelev