Title of Invention

A METHOD FOR DECODING AN ENCODED BTSC COMPOSITE AUDIO SIGNAL

Abstract An algorithm calculates spectral expansion filter coefficients (712) using a value proportional to a reciprocal (720) of a feedback/feedforward signal (a) 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.
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Documents:

2938-CHENP-2005 AMENDED PAGES OF SPECIFICATION 31-05-2011.pdf

2938-CHENP-2005 AMENDED CLAIMS 31-05-2011.pdf

2938-CHENP-2005 ASSIGNMENT 31-05-2011.pdf

2938-CHENP-2005 EXAMINATION REPORT REPLY RECEIVED 31-05-2011.pdf

2938-CHENP-2005 FORM-1 31-05-2011.pdf

2938-CHENP-2005 FORM-3 31-05-2011.pdf

2938-CHENP-2005 OTHER PATENT DOCUMENT 31-05-2011.pdf

2938-CHENP-2005 POWER OF ATTORNEY 31-05-2011.pdf

2938-CHENP-2005 CORRESPONDENCE OTHERS 22-06-2010.pdf

2938-CHENP-2005 AMENDED CLAIMS 02-08-2013.pdf

2938-CHENP-2005 AMENDED PAGES OF SPECIFICATION 02-08-2013.pdf

2938-CHENP-2005 ASSIGNMENT 02-08-2013.pdf

2938-CHENP-2005 CORRESPONDENCE OTHERS 02-08-2013.pdf

2938-CHENP-2005 OTHER PATENT DOCUMENT 02-08-2013.pdf


Patent Number 257051
Indian Patent Application Number 2938/CHENP/2005
PG Journal Number 35/2013
Publication Date 30-Aug-2013
Grant Date 29-Aug-2013
Date of Filing 09-Nov-2005
Name of Patentee THAT CORPORATION
Applicant Address 45 SUMNER STREET,MILFORD,MASSACHUSETTS 01757.
Inventors:
# Inventor's Name Inventor's Address
1 EASLEY, Mathew, F. 1058 Fairway Valley Dr., Woodstock, GA 30189.
2 DARR, Roger 5419 Pepperbush Ct., Sugar Hill, GA 30518.
3 BARNHILL, Mathew 3570 Hermitage Dr., Duluth, GA 30096.
PCT International Classification Number H04R 5/00
PCT International Application Number PCT/US2003/010834
PCT International Filing date 2003-04-09
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA