Matthew Frank Easley

US Patent:

7639307, Dec 29, 2009

Filed:

Aug 3, 2005

Appl. No.:

11/196133

Inventors:

Matthew Barnhill - Duluth GA, US
Matthew Easley - Woodstock GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04N 7/08

US Classification:

348485, 348484, 381 2

Abstract:

A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the sum of a left channel digital audio signal and a right channel digital audio signal and the difference signal represents the difference between the left and right audio signals.

US Patent:

7719616, May 18, 2010

Filed:

Sep 16, 2005

Appl. No.:

11/228066

Inventors:

Matthew Easley - Woodstock GA, US
Matthew Barnhill - Duluth GA, US
W. Kevin Kay - Duluth GA, US

Assignee:

That Corporation - Milford MA

International Classification:

H04N 7/00
H04N 5/38
H04H 20/47
H04H 20/88
H04H 40/36
H04N 5/44
H04N 5/46

US Classification:

348485, 348484, 348723, 348724, 348725, 348729, 382 2

Abstract:

A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard and then combined to form a stereo audio signal. A second audio programming channel signal may be included. A video input can be digitized and conditioned to form a digital video channel. The stereo audio signal can be placed directly at a desired channel frequency by frequency modulation without the need for using an intermediate frequency. The digital video channel can be placed at a desired frequency by amplitude modulation. The digital and audio channels can be digitally combined to create a television transmission signal at a desired frequency and according to a desired standard.

US Patent:

7830452, Nov 9, 2010

Filed:

Nov 30, 2009

Appl. No.:

12/627317

Inventors:

Matthew Easley - Woodstock GA, US
Matthew Barnhill - Duluth GA, US
W. Kevin Kay - Duluth GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04N 7/00

US Classification:

348485, 348484, 348723, 348724, 348729, 382 2

Abstract:

A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard and then combined to form a stereo audio signal. A second audio programming channel signal may be included. A video input can be digitized and conditioned to form a digital video channel. The stereo audio signal can be placed directly at a desired channel frequency by frequency modulation without the need for using an intermediate frequency. The digital video channel can be placed at a desired frequency by amplitude modulation. The digital and audio channels can be digitally combined to create a television transmission signal at a desired frequency and according to a desired standard.

US Patent:

7929054, Apr 19, 2011

Filed:

Dec 29, 2009

Appl. No.:

12/648520

Inventors:

Matthew S. Barnhill - Duluth GA, US
Matthew Easley - Woodstock GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04N 7/08

US Classification:

348485, 348484, 381 2

Abstract:

A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the sum of a left channel digital audio signal and a right channel digital audio signal and the difference signal represents the difference between the left and right audio signals.

US Patent:

7940842, May 10, 2011

Filed:

Jun 6, 2008

Appl. No.:

12/134568

Inventors:

Matthew F. Easley - Woodstock GA, US
Roger Darr - Sugar Hill GA, US
Matthew Barnhill - Duluth GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04B 1/66

US Classification:

375240, 375341

Abstract:

An algorithm calculates spectral compression/expansion filter coefficients using a value proportional to a reciprocal of a feedback/feedforward signal and stores the coefficients to a lookup table. The lookup table is indexed by a pre selected set of coefficient bits to generate a filter coefficient function. A first portion of the lookup table stores a plurality of discrete values at index points of a line segment corresponding to a filter coefficient function approximation, so as to generate an initial discrete value corresponding to the filter coefficient function at a value of the high order bits and a second portion stores a plurality of slope values, which indicates a slope of the filter coefficient function. A linear circuit interpolates/decimates an approximation of the compression/expansion filter coefficient function based on the slope value, the initial discrete value and a preselected set of low order bits of the reciprocal value.

US Patent:

8023590, Sep 20, 2011

Filed:

Jan 4, 2007

Appl. No.:

11/649538

Inventors:

Roger R. Darr - Suwanee GA, US
Matthew F. Easley - Woodstock GA, US
Matthew S. Barnhill - Duluth GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04L 27/00

US Classification:

375316

Abstract:

A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.

US Patent:

8264606, Sep 11, 2012

Filed:

Nov 9, 2010

Appl. No.:

12/942796

Inventors:

Matthew Easley - Woodstock GA, US
Matthew Barnhill - Duluth GA, US
William Kevin Kay - Duluth GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04N 7/00
H04N 5/38
H04N 5/46
H04H 20/47
H04H 20/88
H04H 40/36

US Classification:

348485, 348484, 348723, 348724, 348729, 381 2

Abstract:

A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard and then combined to form a stereo audio signal. A second audio programming channel signal may be included. A video input can be digitized and conditioned to form a digital video channel. The stereo audio signal can be placed directly at a desired channel frequency by frequency modulation without the need for using an intermediate frequency. The digital video channel can be placed at a desired frequency by amplitude modulation. The digital and audio channels can be digitally combined to create a television transmission signal at a desired frequency and according to a desired standard.

US Patent:

8494104, Jul 23, 2013

Filed:

Sep 19, 2011

Appl. No.:

13/236291

Inventors:

Roger R. Darr - Suwanee GA, US
Matthew F. Easley - Woodstock GA, US
Matthew S. Barnhill - Duluth GA, US

Assignee:

THAT Corporation - Milford MA

International Classification:

H04L 25/40
H04L 27/00

US Classification:

375371, 375316

Abstract:

A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.