Bradley Arthur Wallace

US Patent:

7130362, Oct 31, 2006

Filed:

Nov 16, 2005

Appl. No.:

11/281013

Inventors:

James Girardeau - Austin TX, US
Bradley Wallace - Austin TX, US
Christopher Alan Aardema - Austin TX, US

Assignee:

VIXS, Inc. - Toronto

International Classification:

H03D 1/00

US Classification:

375340

Abstract:

A wireless communication device capable of receiving data using non-standard data includes a receiver section, a demodulation mapping module, a decoding module, and a rate determination module. The receiver section is operably coupled to convert a radio frequency signal into a digital signal. The demodulation mapping module is operably coupled to demodulate the digital signal to produce demodulated data. The decoding module is operably coupled to decode the demodulated data based on the coding rate to produce decoded data. The rate determination module is operably coupled to determine the coding rate from at least one of the digital signal and the demodulated data, wherein the coding rate is one of a plurality of standard coding rates or a non-standard coding rate that is selected for a given transmission.

US Patent:

7418049, Aug 26, 2008

Filed:

Jun 3, 2002

Appl. No.:

10/160917

Inventors:

Bradley Wallace - Austin TX, US

Assignee:

ViXS Systems Inc. - Toronto, Ontario

International Classification:

H04L 27/28
H04J 11/00

US Classification:

375261, 375260, 370206, 370207

Abstract:

A method and apparatus for decoding baseband OFDM signals include processing that begins by slicing each sub-carrier signal of the OFDM signal into a plurality of error terms. The particular number of error terms generated for each sub-carrier signal depends on the constellation size of the data being carried by each of the sub-carrier signals. The error terms for each sub-carrier signal corresponds to the nearest constellation point having a zero or one in the I or Q direction. The process continues by grouping individual error terms of the plurality of error terms for each sub-carrier signal to produce a plurality of error terms. The processing then continues by de-interleaving each of the plurality of error term groups to produce a corresponding plurality of de-interleaved error term groups. The processing then continues by interpreting the plurality of de-interleaved error term groups to produce a plurality of data values, each of the data values corresponds to data encoded within each of the sub-carrier signals.

US Patent:

7421046, Sep 2, 2008

Filed:

Feb 28, 2003

Appl. No.:

10/376486

Inventors:

Bradley A. Wallace - Austin TX, US
James Robert Kelton - Austin TX, US

Assignee:

ViXS Systems Inc. - Toronto, Ontario

International Classification:

H04B 7/10
H04L 27/00

US Classification:

375347, 375316, 375324, 375325, 375341, 375349

Abstract:

A method signal for decoding in a diversity reception system can include converting the received RF signal into a plurality of digital baseband signals; phase aligning the plurality of digital baseband signals to produce a plurality of phase aligned digital baseband signals; determining a plurality of error terms from the plurality of phase aligned digital baseband signals; one of which corresponding to one of the plurality of phase aligned digital baseband signals; determining a plurality of weighting factors for the plurality of error terms based on characteristics of the plurality of digital baseband signals, one of which corresponding to one of the plurality of error terms; applying the plurality of weighting factors to the plurality of error terms to produce a plurality of weighted error terms; summing the plurality of weighted error terms to produce an error term for decoding.

US Patent:

7610017, Oct 27, 2009

Filed:

Jun 9, 2005

Appl. No.:

11/148704

Inventors:

Christopher Alan Aardema - Austin TX, US
Bradley Arthur Wallace - Austin TX, US

Assignee:

VIXS Systems, Inc. - Toronto, Ontario

International Classification:

H04B 7/00

US Classification:

455 59, 455103, 455132, 370535, 370536, 375349

Abstract:

A method for receiving high data rate wireless communication transmissions begins by receiving a plurality of radio frequency (RF) signals in accordance with a wireless communication standardized data rate on a plurality of RF channels. The method continues by converting each of the plurality of RF signals into a plurality of signals. The method continues by processing the plurality of signals at baseband or near baseband into media access control (MAC) data, wherein a number of the plurality of signals corresponds to an integer multiple. The method continues by processing the MAC data at a combination of wireless communication standardized data rates to produce recovered data.

US Patent:

7725807, May 25, 2010

Filed:

Jan 23, 2006

Appl. No.:

11/337333

Inventors:

Bradley Arthur Wallace - Austin TX, US
Paul Morris Astrachan - Austin TX, US

Assignee:

VIXS Systems, Inc. - Toronto, Ontario

International Classification:

H03M 13/00

US Classification:

714776, 714777, 714795, 714 21, 369 3021

Abstract:

A method for field error checking begins by decoding a predetermined pattern of a field of a frame to produce a decoded pattern. The method continues by determining, for the decoded pattern, a path metric distance of a predetermined state of a plurality of states of the decoding. The method continues by comparing the path metric distance with an excepted path metric distance for the predetermined state. The method continues by indicating a field error when the path metric distance compares unfavorably with the excepted path metric distance.

US Patent:

8284314, Oct 9, 2012

Filed:

Dec 16, 2009

Appl. No.:

12/639353

Inventors:

Bradley Arthur Wallace - Austin TX, US
James Christopher Lynch - West Lake Hills TX, US

Assignee:

Vixs Systems, Inc. - Toronto, Ontario

International Classification:

H04N 5/21
H04N 5/213
G06K 9/40

US Classification:

348625, 348606, 382263, 382266

Abstract:

A video processing device includes an input to receive pixel values for a set of pixels comprising a pixel window substantially centered around a select pixel that initially has a first pixel value. The video processing device further includes a first filter unit to determine a horizontal transient improvement value based on non-linear filtering of the pixel values in a horizontal direction, a second filter unit to determine a vertical transient improvement value based on non-linear filtering of the pixel values in a vertical direction, a third filter unit to determine a first diagonal transient improvement value based on non-linear filtering of the pixel values in a first diagonal direction, and a fourth filter unit to determine a second diagonal transient improvement value based on non-linear filtering of the pixel values in a second diagonal direction that is perpendicular to the first diagonal direction. The video processing device also includes an output to provide a second pixel value for the select pixel, the second pixel value based on the first pixel value, the vertical transient improvement value, the horizontal transient improvement value, the first diagonal transient improvement value, and the second diagonal transient improvement value.

US Patent:

8643777, Feb 4, 2014

Filed:

Sep 25, 2009

Appl. No.:

12/567128

Inventors:

Bradley Arthur Wallace - Austin TX, US

Assignee:

VIXS Systems Inc. - Toronto, Ontario

International Classification:

H04N 7/01
H04N 11/20

US Classification:

348448, 348441, 348452, 348458, 348607, 348700, 348625, 348630, 348459, 382300, 382263, 382266, 382261, 382199, 382264

Abstract:

A pixel interpolation process is based on detection of a potential edge in proximity to a pixel being estimated, and the angle thereof. The potential edge and its angle is determined based on filtering of offset or overlapping sets of lines from a pixel window centered around the pixel being estimated and then cross-correlating the filter results. The highest value in the correlation result values represents a potential edge in proximity to the pixel being estimated and the index of the highest value represents the angle of the potential edge. This information is used in conjunction with other information from the cross-correlation and analysis of the differences between pixels in proximity to verify the validity of the potential edge. If determined to be valid, a diagonal interpolation based on the edge and its angle is used to estimate the pixel value of the pixel. Otherwise, an alternate interpolation process, such as vertical interpolation, is used to estimate the pixel value for the pixel.

US Patent:

20120301046, Nov 29, 2012

Filed:

May 27, 2011

Appl. No.:

13/117328

Inventors:

Bradley Arthur Wallace - Austin TX, US

International Classification:

G06K 9/40

US Classification:

382263, 382266

Abstract:

In at least one embodiment of the invention, an apparatus for adaptive edge enhancement of a video signal includes a transient improvement module. The transient improvement module is configured to generate a first adjusted pixel value based on a window of pixel values for pixels surrounding a pixel-of-interest initially having an input pixel value. The apparatus includes an adaptive peaking module configured to generate a second adjusted pixel value based on the first adjusted pixel value and the input pixel value. In at least one embodiment of the apparatus, the adaptive peaking module comprises a high-pass filter configured to generate a pixel adjustment based on the first adjusted pixel value. In at least one embodiment of the apparatus, the adaptive peaking module further comprises a gain path configured to apply at least one adaptive gain value to the pixel adjustment to generate an adaptive adjustment value.