Patents by Inventor Roger Darr
Roger Darr has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9010070Abstract: A structural framing member comprises a web flanked by a pair of flanges. The flanges may extend generally perpendicularly from the side edges of the web. In some embodiments, the web may comprise a plurality of evenly-spaced embossments positioned along the centerline of the web. The embossments may be diamond shaped. The web may further comprise one or more longitudinally extending offsets that extend along the length of the web. Each flange may comprise a plurality of evenly-spaced longitudinally extending stiffeners. The longitudinally extending stiffeners may be spaced approximately ?? (0.953 cm) apart from each other. In some embodiments, each flange may further comprise a free end, which is bent inwardly to form a return lip along the length of the flange. The return lip may extend generally perpendicularly from the flange and generally parallel to the web. The structural framing member may comprise a stud, track member, or other framing member.Type: GrantFiled: August 16, 2010Date of Patent: April 21, 2015Assignee: Clarkwestern Dietrich Building Systems LLCInventors: Leslie Rogers Darr, III, Jeremy Ryan Smith, Michael Francis Cavanaugh, Terry Robert Westerman, James Michael Wielinga, Gregory S. Ralph, Nagaraj Eshwar, Thomas J. Lawson, David Lee Keebler
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Publication number: 20120216480Abstract: A structural framing member comprises a web flanked by a pair of flanges. The flanges may extend generally perpendicularly from the side edges of the web. In some embodiments, the web may comprise a plurality of evenly-spaced embossments positioned along the centerline of the web. The embossments may be diamond shaped. The web may further comprise one or more longitudinally extending offsets that extend along the length of the web. Each flange may comprise a plurality of evenly-spaced longitudinally extending stiffeners. The longitudinally extending stiffeners may be spaced approximately ?? (0.953 cm) apart from each other. In some embodiments, each flange may further comprise a free end, which is bent inwardly to form a return lip along the length of the flange. The return lip may extend generally perpendicularly from the flange and generally parallel to the web. The structural framing member may comprise a stud, track member, or other framing member.Type: ApplicationFiled: August 16, 2010Publication date: August 30, 2012Applicant: Clarkwestern Dietrich Building Systems LLCInventors: Leslie Rogers Darr, III, Jeremy Ryan Smith, Michael Francis Cavanaugh, Terry Robert Westerman, James Michael Wielinga, Gregory S. Ralph, Nagaraj Eshwar, Thomas J. Lawson, David Lee Keebler
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Patent number: 7940842Abstract: 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.Type: GrantFiled: June 6, 2008Date of Patent: May 10, 2011Assignee: THAT CorporationInventors: Matthew F. Easley, Roger Darr, Matthew Barnhill
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Publication number: 20100328531Abstract: Television audio signal encoders include a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoders also include a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal and/or the sum signals. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission. Decoders with the matrix are also disclosed.Type: ApplicationFiled: September 7, 2010Publication date: December 30, 2010Applicant: THAT CorporationInventors: Matthew Barnhill, Roger Darr
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Patent number: 7826621Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.Type: GrantFiled: May 26, 2009Date of Patent: November 2, 2010Assignee: THAT CorporationInventors: Matthew Barnhill, Roger Darr
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Publication number: 20090231491Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.Type: ApplicationFiled: May 26, 2009Publication date: September 17, 2009Inventors: Matthew S. Barnhill, Roger Darr
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Patent number: 7539316Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.Type: GrantFiled: March 24, 2005Date of Patent: May 26, 2009Assignee: THAT CorporationInventors: Matthew Barnhill, Roger Darr
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Publication number: 20080317114Abstract: 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.Type: ApplicationFiled: June 6, 2008Publication date: December 25, 2008Inventors: Matthew F. Easley, Roger Darr, Matthew Barnhill
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Patent number: 7397850Abstract: 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.Type: GrantFiled: April 4, 2003Date of Patent: July 8, 2008Inventors: Mathew F. Easley, Roger Darr, Matthew Barnhill
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Publication number: 20070165762Abstract: 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.Type: ApplicationFiled: January 4, 2007Publication date: July 19, 2007Inventors: Roger Darr, Matthew Easley, Matthew Barnhill
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Publication number: 20050232433Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.Type: ApplicationFiled: March 24, 2005Publication date: October 20, 2005Inventors: Matthew Barnhill, Roger Darr
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Publication number: 20030198352Abstract: 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.Type: ApplicationFiled: April 4, 2003Publication date: October 23, 2003Inventors: Mathew F. Easley, Roger Darr, Mathew Barnhill
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Patent number: 6588867Abstract: In a method of calculating a variable spectral compression filter coefficient in a BTSC compatible stereo encoder from a feedback variable, a reciprocal value that is proportional to a reciprocal of the feedback variable is calculated. A lookup table is indexed using a preselected set of bits of the reciprocal value to generate at least one parameter of the filter coefficient function. An approximation of the compression filter coefficient is linearly interpolated based on the at least one parameter of the filter coefficient function. An apparatus that includes circuitry that calculates a variable spectral compression filter coefficient in a BTSC compatible stereo encoder from a feedback variable includes a reciprocal value circuit that calculates a proportional to a reciprocal value of the feedback variable.Type: GrantFiled: February 18, 2000Date of Patent: July 8, 2003Assignee: Arris International, Inc.Inventor: Roger Darr
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Patent number: 6259482Abstract: The present invention includes a digital stereo modulator having a digital left channel input and a digital right channel input into a Digital BTSC Stereo Generator that contains a Sine Table. The Digital BTSC Stereo Generator generates and outputs the following signals: 2*FH, compressed BTSC L−R, preemphasized BTSC L+R, and FH. A digital multiplier amplitude modulates the 2*FH carrier with the compressed BTSC L−R output, and the resultant signal is a Stereo Subchannel AM-DSB-SC BTSC Compressed L−R, which is then summed together with the preemphasized BTSC L+R, and FH by a digital summer. The output of the digital summer is the composite BTSC output without SAP or Professional channels. The Digital BTSC Stereo Generator transforms left and right inputs into the outputs described above by utilizing clock inputs 3*FH and 12*FH. A digital PLL phase locks 3*FH and 12*FH clocks to a Horizontal Synch (FH) reference, for input to the Digital BTSC Stereo Generator.Type: GrantFiled: January 11, 1999Date of Patent: July 10, 2001Inventors: Matthew F. Easley, Roger Darr
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Patent number: 6192086Abstract: A BTSC-compatible encoder that is integrated onto an application specific integrated circuit includes a low pass filter that is responsive to a digital representation of an audio signal that has a sample rate of FS. The low pass filter generates a corresponding second digital signal having an pseudo-interpolated sampling rate of 4FS. A digital infinite impulse response pre-emphasis filter generates a pre-emphasized output signal corresponding to the second digital signal. A digital signal compressor that is responsive to the pre-emphasized output signal, generates a compressed digital signal corresponding to the pre-emphasized output signal. A digital phase locked loop that is responsive to a video sync pulse having a sync pulse frequency, generates a third digital signal corresponding to a sinusoid having a frequency equal to twice the sync pulse frequency and a having a sampling frequency equal to 4FS.Type: GrantFiled: January 14, 2000Date of Patent: February 20, 2001Assignee: Antec CorporationInventor: Roger Darr
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Patent number: D751222Type: GrantFiled: January 2, 2015Date of Patent: March 8, 2016Assignee: CLARKWESTERN DIETRICH BUILDING SYSTEMS LLCInventors: Leslie Rogers Darr, III, Jeremy Ryan Smith, Michael Francis Cavanaugh, Terry Robert Westerman, James Michael Wielinga, Gregory S. Ralph, Nagaraj Eshwar, Thomas J. Lawson, David Lee Keebler
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Patent number: D751733Type: GrantFiled: January 2, 2015Date of Patent: March 15, 2016Assignee: CLARK WESTERN DIETRICH BUILDING SYSTEMS LLCInventors: Leslie Rogers Darr, III, Jeremy Ryan Smith, Michael Francis Cavanaugh, Terry Robert Westerman, James Michael Wielinga, Gregory S. Ralph, Nagaraj Eshwar, Thomas J. Lawson, David Lee Keebler