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:
Apr. 17, 1984
Filed:
Jul. 06, 1981
Richard H Wiggins, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An adaptive filter suitable for speech analysis which is constructable on a silicon chip. The filter has a single multiplier and a single adder in series together with appropriate registers or memories so that the output of the adder is either looped back to the adder itself or alternatively is looped, after a delay, to the multiplier so as to perform the operations of an all-zero digital lattice filter in computing a moving average, employing linear predictive coding. Another register provides the multiplier with the constant values typically associated with lattice filter coefficients. Preferably the multiplier is an M-stage pipeline multiplier so as to reduce the area necessary for its incorporation on a silicon chip. The filter accepts digital samples of the voice input and outputs a compressed data representation of the input.