Charles M Brooks

US Patent:

7224726, May 29, 2007

Filed:

Mar 28, 2002

Appl. No.:

10/109496

Inventors:

Randall Perlow - Aliso Viejo CA, US
Charles Brooks - Laguna Beach CA, US
Steven Jaffe - Irvine CA, US
Tianmin Liu - Laguna Niguel CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04H 7/40

US Classification:

375233, 375285, 375350, 455134, 455135, 455303, 455306

Abstract:

An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.

US Patent:

7230983, Jun 12, 2007

Filed:

Mar 12, 2003

Appl. No.:

10/387251

Inventors:

Nabil R. Yousef - Foothill Ranch CA, US
Randall Perlow - Aliso Viejo CA, US
Charles Alan Brooks - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03H 7/30
H03K 5/159

US Classification:

375232, 375233

Abstract:

Determination of equalizer coefficients from a sparse channel estimate begins by determining location of significant taps based on the sparse channel estimate of a multiple path communication channel. The sparse channel estimate indicates the positioning of signals received via the various multiple paths of the channel. The method then continues by determining feed-forward equalization coefficients based on the location of the significant taps. The method then continues by determining feedback equalization coefficients based on the feed-forward equalization coefficients and the sparse channel estimate.

US Patent:

7440520, Oct 21, 2008

Filed:

May 29, 2007

Appl. No.:

11/754866

Inventors:

Randall Perlow - Aliso Viejo CA, US
Charles Brooks - Laguna Beach CA, US
Steven Jaffe - Irvine CA, US
Tianmin Liu - Laguna Niguel CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 27/06

US Classification:

375340, 375230, 375285, 375350, 455134, 455303

Abstract:

An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.

US Patent:

7525600, Apr 28, 2009

Filed:

May 25, 2005

Appl. No.:

11/137528

Inventors:

Tarek Kaylani - Irvine CA, US
Charles Brooks - Laguna Beach CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 3/27

US Classification:

348554, 348725

Abstract:

Methods and systems for processing television signals are disclosed herein, and may comprise decoding a first analog video signal via an integrated circuit comprising circuitry for decoding and processing digital video signals. A second analog video signal may be simultaneously decoded via the integrated circuit. A first video output corresponding to the decoded first analog video signal and a second video output corresponding to the decoded second analog video signal may be simultaneously generating via the integrated circuit. An out-of-band signal corresponding to the decoded first or second analog video signal may be received via the integrated circuit. The received out-of-band signal may be processed via the integrated circuit. The first analog video signal and the second analog video signal may comprise an NTSC signal, a composite signal, an S-video signal, and/or a component signal. The digital video signals may be decoded via the integrated circuit.

US Patent:

7701515, Apr 20, 2010

Filed:

Jul 2, 2004

Appl. No.:

10/882293

Inventors:

Ramon A. Gomez - San Juan Capistrano CA, US
Charles Brooks - Laguna Beach CA, US
Leonard Dauphinee - Irvine CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 5/44

US Classification:

348731

Abstract:

A front end circuit for a television receiver includes a demultiplexer for inputting a multi-band signal from a signal source and separating the multi-band signal into corresponding bands. A plurality of amplifiers adjust gain on signals corresponding to the bands. A multiplexer combines outputs of the amplifiers into a gain-adjusted signal. A plurality of switches direct selected bands to corresponding tuners. The amplifiers are low noise amplifiers. The amplifiers adjust gain between the bands so as to have similar signal strength in the bands. A cable TV input may also be used, wherein the switches also direct signals from the cable TV to the corresponding tuners. Each amplifier can output two (or more) identical signals for its corresponding band, the multiplexer can be a dual multiplexer, and an output of the multiplexer includes only bands selected for direction to the tuners. The signal source comprises any of a broadcast channel received from an antenna, a cable TV channel received from a cable line, and a combination of the two.

US Patent:

7751477, Jul 6, 2010

Filed:

Dec 15, 2003

Appl. No.:

10/736434

Inventors:

Alan Y. Kwentus - San Juan Capistrano CA, US
Charles Alan Brooks - Laguna Beach CA, US
Steven Jaffe - Irvine CA, US
Stephen Edward Krafft - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 7/12
H04H 20/74

US Classification:

37524007, 455 302

Abstract:

Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e. g. , 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e. g. , QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.

US Patent:

7953193, May 31, 2011

Filed:

Mar 12, 2003

Appl. No.:

10/386795

Inventors:

Randall Perlow - Aliso Viejo CA, US
Nabil R. Yousef - Foothill Ranch CA, US
Charles Alan Brooks - Laguna Beach CA, US
Tianmin Liu - Laguna Niguel CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03D 1/06
H04B 1/10
H04L 25/08

US Classification:

375346, 375233

Abstract:

Sparse channel equalization may be achieved by receiving a signal via a multi-path communication channel. The equalization then continues by extracting sparse information regarding the multiple path communication channel from the signal. Such sparse information generally indicates the position of the signals received via each of the multiple paths. The equalization then continues by estimating a channel response of the multiple path communication channel based on the sparse information. The equalization then continues by generating equalization taps (or coefficients) based on the channel response. The equalization then continues by equalizing the signal based on the equalization taps.

US Patent:

8014449, Sep 6, 2011

Filed:

Jun 29, 2010

Appl. No.:

12/825893

Inventors:

Alan Y. Kwentus - Coto de Caza CA, US
Charles Alan Brooks - Laguna Beach CA, US
Steven T. Jaffe - Irvine CA, US
Stephen Edward Krafft - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 7/12

US Classification:

37524007, 725111, 714774

Abstract:

Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e. g. , 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e. g. , QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.