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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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