Patents Assigned to Broadcom Corporation
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Publication number: 20090041042Abstract: A system and method for adjusting a level of compression for endpoint devices. Endpoint devices in a network can stream audio/video traffic over a network. Such a connection between the endpoint devices can be reserved with guarantees of latency being obtained. Latency guarantees across multiple intermediary switches can be used to define a compression level for the end devices.Type: ApplicationFiled: August 10, 2007Publication date: February 12, 2009Applicant: Broadcom CorporationInventor: Wael William Diab
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Publication number: 20090043571Abstract: Methods and systems for sample rate conversion convert a sampled signal to a higher data rate signal. Conversion pulses are received, having a conversion rate that is higher than the sample rate of the sampled signal. Sample points are then reconstructed from the sampled signal, in real time, on either side of a conversion pulse. An interpolation is performed between the reconstructed sample points, at the time of the conversion pulse. The interpolation results are outputted in real time. The process is repeated for additional conversion pulses. The outputted interpolated amplitudes form the higher data rate signal having a data rate equal to the conversion rate. Sample rate conversion is thus performed in real time according to the higher data rate clock, rather than with fixed ratios. As a result, when the higher data rate clock is affected by, for example, jitter or other frequency variations, the higher data rate samples immediately track the lower data rate samples.Type: ApplicationFiled: August 4, 2008Publication date: February 12, 2009Applicant: Broadcom CorporationInventor: Hoang Nhu
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Patent number: 7490187Abstract: A dual mode digital interface supports the HyperTransport Standard and at least one other interface standard. The dual mode digital interface includes a physical interface, a plurality of data line amplifiers, a clock line amplifier, a plurality of data line deskew/sampling blocks, a data group deskew module, and an enablement control module. The plurality of data line deskew/sampling blocks deskew and sample incoming data on respective data lines based upon a clock signal to produce deskewed data. The data group deskew module receives deskewed data from each of the plurality of data line deskew/sampling blocks and removes inter data line skew from the deskewed data to produce received data. The plurality of data line deskew/sampling blocks and the data group deskew module may be set based upon a training sequence received from a link partner. The training sequence may received during startup or reset, immediately after startup or reset completes, or may be received periodically during training intervals.Type: GrantFiled: December 20, 2003Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Laurent R. Moll, Manu Gulati
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Patent number: 7489338Abstract: A system and method for automatically controlling color synchronization polarity during video decoding. Various aspects of the present invention may comprise at least one module that is adapted to monitor color synchronization polarity at a plurality of instances over a period of time. The at least one module may also, for example, be adapted to generate a sequence of signals indicative of the color synchronization polarity correctness at the plurality of instances. The at least one module may additionally, for example, be adapted to statistically analyze the sequence of signals. The at least one module may further, for example, be adapted to determine, based at least in part on the statistical analysis of the sequence of signals, whether color synchronization polarity is correct. The at least one module may still further, for example, be adapted to control color synchronization polarity based, at least in part, on the polarity correctness determination.Type: GrantFiled: August 17, 2005Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Wen Huang, Brad Delanghe, Aleksandr Movshovich
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Patent number: 7490231Abstract: Aspects of a method and system for blocking data in scan registers from being shifted out of a device may comprise preventing data intrusion in an integrated circuit by generating a device reset signal prior to entering scan mode. The method may further comprise detecting an attempt to enter said scan mode. The device reset signal may also be an internal reset signal. A subsequent device reset signal may be generated after entering scan mode. The subsequent device reset signal may be an internal pulse signal. The method may further comprise clearing stored data in an integrated circuit after generating a subsequent device reset signal.Type: GrantFiled: December 15, 2004Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Tony Michael Turner, Jonathan Huy Kuo, Jack Arnold Manson, Martin Kuhlmann, Vin P Hue
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Patent number: 7489269Abstract: Method and apparatus for processing satellite signals from a first satellite navigation system and a second satellite navigation system is described. In one example, at least one first pseudorange between a satellite signal receiver and at least one satellite of the first satellite navigation system is measured. At least one second pseudorange between the satellite signal receiver and at least one satellite of the second satellite navigation system is measured. A first difference between a first time reference frame of the first satellite navigation system and a time reference and a second difference between a second time reference frame of the second satellite navigation system and the time reference are obtained. The at least one first pseudorange and the at least one second pseudorange are combined using the first and second differences in time references.Type: GrantFiled: December 20, 2006Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Frank van Diggelen, Javier De Salas
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Patent number: 7489725Abstract: A feedforward filter has a plurality of feedforward filter taps, including a feedforward filter reference tap. The reference tap of the feedforward filter is positioned proximate a center position of the feedforward filter. A ramping circuit assembly has an input port configured to receive at least one decision feedback filter tap coefficient from a decision feedback filter. A coefficient ramping circuit is configured to provide a ramped output for at least one of the decision feedback filter tap coefficients. The ramped output is varied over time from a first value to a second value. The second value is dependent upon the value of a decision feedback filter tap coefficient. An output port of the ramping circuit assembly is configured to communicate information representative of the ramped output(s) to a precoder.Type: GrantFiled: May 19, 2004Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Steven T. Jaffe, Robindra Joshi, David Jones, Thuji Simon Lin
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Patent number: 7489741Abstract: A method to perform DC compensation on a Radio Frequency (RF) burst transmitted between a servicing base station and a wireless terminal in a cellular wireless communication system that first receives the RF burst modulated according to either a first or second modulation format. Samples from the RF burst, or taken from the training sequence, are produced and averaged to produce a DC offset estimate. The DC offset estimate is then subtracted from each of the samples. The modulation format of RF burst may then be identified from the samples. Depending on the identified modulation format the DC offset estimate may be re-added to the samples when a particular modulation format is identified as the modulation format of the RF burst. This decision is made based on how well various components within the wireless terminal perform DC offset compensation.Type: GrantFiled: March 25, 2006Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Baoguo Yang, Nelson R. Sollenberger
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Patent number: 7489362Abstract: A television on a chip (TVOC) system that provides a cost effective approach for providing television functionality on a single integrated circuit chip is disclosed. A TVOC includes the functionality necessary to receive and display television signals in a variety of input and output formats. A TVOC can be used in set-top boxes for cable and satellite television, or directly within a television. All functionality provided can be provided on a single integrated circuit. TVOC includes a data transport module, an IF demodulator, a digital audio engine, an analog audio engine, a digital video engine, and an analog video engine. The TVOC also includes three sets of interfaces including output interfaces, control interfaces and ancillary interfaces. Further features and embodiments provide enhanced functionality and increased efficiencies.Type: GrantFiled: March 3, 2004Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: David A. Baer, Jeff Tingley, Aleksandr Movshovich, Brad Grossman, Brian F. Schoner, Chengfuh Jeffrey Tang, Chuck Monahan, Darren D. Neuman, David Chao Hua Wu, Francis Cheung, Greg A. Kranawetter, Hoang Nhu, Hsien-Chih Jim Tseng, Iue-Shuenn Chen, James D. Sweet, Jeffrey S. Bauch, Keith LaRell Klingler, Patrick Law, Rajesh Mamidwar, Dan Simon, Sang Van Tran, Shawn V. Johnson, Steven T. Jaffe, Thu T. Nguyen, Ut Nguyen, Yao-Hua Steven Tseng, Brad Delanghe, Ben Giese, Jason Demas, Lakshman Ramakrishnan, Sandeep Bhatia, Guang-Ting Shih, Tracy C. Denk
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Patent number: 7489729Abstract: A method and apparatus are provided for implementing an enhanced reduced memory mode (RMM) of decoding HDTV MPEG-2 video stream. In one instance, the RMM mode is adaptively enabled with up/down conversion by using the picture-type information. In another instance, the RMM mode is provided by performing anchor-frame compression/decompression by using adaptive DPCM technique with picture-type information. The quantization (PCM) tables are generated using the Lloyd algorithm. Further, the predictor for each pixel is determined by a use of the Graham rule.Type: GrantFiled: August 15, 2005Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Sherman Xuemin Chen, Jason Demas, Sandeep Bhatia
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Patent number: 7489221Abstract: An inductor circuit is disclosed. The inductor circuit includes a first in-silicon inductor and a second in-silicon inductor each having multiple turns. A portion of the multiple turns of the second in-silicon inductor is formed between turns of the first in-silicon inductor. The first and second in-silicon inductors are configured such that a differential current flowing through the first in-silicon inductor and the second in-silicon inductor flows in a same direction in corresponding turns of inductors.Type: GrantFiled: August 15, 2006Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Carol Barrett, Tom McKay, Subhas Bothra
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Patent number: 7490284Abstract: Herein described is a system and a method of detecting and correcting data bit errors using a sequence of one or more codewords transmitted through a communication channel characterized by intersymbol interference. Each of the one or more codewords incorporates one or encodes one or more parity bits. The codewords are processed by a Meta-Viterbi detector that utilizes a Meta-Viterbi algorithm. The Meta-Viterbi detector comprises an event weight processor, a computational circuitry, a parity syndrome calculator, and an error correction circuitry. The Meta-Viterbi detector receives an output generated from a Viterbi detector having 2s states and processes the received output using a trellis diagram having 2t states.Type: GrantFiled: February 3, 2005Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventor: Andrei E. Vityaev
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Patent number: 7489644Abstract: A control terminal such as a CMTS is initialized to receive packets of voice calls having parameters including a bit rate, a packetization interval, and a call identification. A plurality of queues is created to define a corresponding plurality of phases at a sub-multiple of the packetization interval. Voice calls are admitted to the control terminal. The voice calls are distributed among the queues in a predetermined order as the voice calls are admitted and the voice calls removed from the queues as the voice calls are terminated. USGs are periodically issued at the phases defined by the queues. The USGs include a call identification and a grant of bandwidth sufficient to transmit the packets.Type: GrantFiled: October 13, 2005Date of Patent: February 10, 2009Assignee: Broadcom CorporationInventors: Ajay Chandra V. Gummalla, Dolors Sala
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Publication number: 20090034439Abstract: The present invention relates to a transceiver for bidirectional frequency division multiplexed transmission, a communication system including one or more transceivers. Optionally, the communication system is a communication system for a digital subscriber line. The transceiver comprises transmission means with a voltage source output or a current source output for transmitting data in a transmission frequency range, receiving means for receiving data in a receiving frequency range, and a coupling impedance for connecting the transmission means and the receiving means to a transmission medium. The magnitude of the coupling impedance in the transmission frequency range is smaller than the magnitude of the coupling impedance in the receiving frequency range if the transmission means has a voltage source output and is higher than the magnitude of the coupling impedance in the receiving frequency range if the transmission means has a current source output.Type: ApplicationFiled: September 18, 2008Publication date: February 5, 2009Applicant: Broadcom CorporationInventor: Rudi Verbist
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Publication number: 20090037629Abstract: A radio frequency (RF) integrated circuit (IC) operable to support wireless communications is provided. This RF IC includes a number of master components, a number of slave components, and a direct master slave bus. The master components may include a number of processing modules where each processing module is operable to support one or more functions of the RF IC. The direct master slave bus may couple at least one master component to at least one slave component based on mode of operation of the RF IC.Type: ApplicationFiled: March 27, 2008Publication date: February 5, 2009Applicant: Broadcom CorporationInventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Hooman Darabi, Vafa James Rakshani, Claude G. Hayek
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Publication number: 20090033359Abstract: A programmable logic device includes at least one input port, at least one output port, a plurality of configurable blocks and a program interface module coupled to configure the plurality of configurable blocks, the input ports and the output port in accordance with a configuration file. One or more millimeter wave transceivers operate in accordance with a millimeter wave protocol to wirelessly receive the configuration file, to wirelessly receive input data at the input ports, and/or to wirelessly receive output data from the output port. A millimeter wave RF bus is optionally included to couple the configurable blocks in accordance with the configuration file, either to one another or to other components such as a memory and a processor.Type: ApplicationFiled: July 31, 2007Publication date: February 5, 2009Applicant: Broadcom CorporationInventor: Ahmadreza (Reza) Rofougaran
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Publication number: 20090036070Abstract: An integrated circuit (IC) includes a first die, a second die, a packaging substrate, and coupling circuit. The first die includes first circuitry and the second die includes second circuitry. The packaging substrate supports the first and second dies, wherein the first and second dies are stacked with respect to the packaging substrate. The coupling circuit couples the first die to the second die, wherein the first and second circuitry communicate via the coupling circuit.Type: ApplicationFiled: August 2, 2007Publication date: February 5, 2009Applicant: Broadcom Corporation, a California CorporationInventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Vafa James Rakshani, Hooman Darabi, Claude G. Hayek, Frederic Christian Marc Hayem
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Publication number: 20090036173Abstract: A radio frequency (RF) integrated circuit (IC) operable to support wireless communications is provided. In one embodiment, the RF IC includes an advanced high-performance (AHB) bus matrix, a microprocessor core coupled to the AHB bus matrix, a plurality of processing modules wherein each processing module is operable to support one or more functions of the RF IC, and a plurality of power islands. Each power island is associated with one or more functions of the RF IC. This arrangement allows power islands coupled to the processing modules associated with the one or more functions associated with the power island to supply power for the processing modules associated with the one or more functions associated with the power island. Power from the power island(s) to the processing module(s) may be reduced or secured when the one or more functions associated with the power island is not required.Type: ApplicationFiled: March 27, 2008Publication date: February 5, 2009Applicant: Broadcom CorporationInventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Hooman Darabi, Vafa James Rakshani, Claude G. Hayek
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Publication number: 20090037628Abstract: A processing system includes a plurality of first circuit modules and a wired data bus, connected to the plurality of first circuit modules. A plurality of second circuit modules are coupled to an RF data bus via a millimeter wave communication path. A millimeter wave modem receives first data from at least one of the plurality of first circuit modules via the wired data bus, and transmits the first data over the RF data bus to at least one of the plurality of second circuit modules.Type: ApplicationFiled: July 31, 2007Publication date: February 5, 2009Applicant: Broadcom CorporationInventor: Ahmadreza (Reza) Rofougaran
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Publication number: 20090036067Abstract: A communication device has a plurality of circuit modules including a processing module, a memory module and a wireless telephony transceiver for communicating with a network in accordance with a wireless telephony protocol. An RF data bus communicates first data between at least two of the plurality of circuit modules over a first millimeter wave communication path.Type: ApplicationFiled: July 31, 2007Publication date: February 5, 2009Applicant: Broadcom CorporationInventor: Ahmadreza (Reza) Rofougaran