The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2007
Filed:
Dec. 20, 2002
Rustin W. Allred, Plano, TX (US);
Rustin W. Allred, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A system () for providing an integer number N of filters. The system comprises an input (D) for receiving a digital audio signal and an output (D) for providing a filtered audio signal. The system also comprises circuitry () for storing at least a first set of fixed filter coefficients and circuitry for storing estimation data. The system also comprises circuitry () for estimating a number of sets of estimated filter coefficients in response to the estimation data and the fixed filter coefficients. The system also comprises circuitry () for applying a transfer function to the digital audio signal and in response for providing the filtered audio signal. The circuitry for applying the transfer function applies a set of filter coefficients selected from the first set of fixed filter coefficients and the sets of estimated filter coefficients. Also, the transfer function is selected from a transfer function set consisting of a high pass filter transfer function and a low pass filter transfer function.