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:
Dec. 04, 1984
Filed:
Mar. 30, 1982
Applicant:
Inventors:
Richard V Cox, Piscataway, NJ (US);
Ronald E Crochiere, Berkeley Heights, NJ (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10L / ;
U.S. Cl.
CPC ...
381 38 ; 364728 ;
Abstract
Continuous stream processing of an input signal to find the autocorrelation function and pitch period is simplied. The input speech signal is sampled at 8 khz, from which the autocorrelation function is formed by multiplying each sample by a stored-delay reduced sequence of up to 30 past samples. The reduced sequence is formed by every fourth sample of input signal gated to storage. Autocorrelation values are sequentially compared by a peak-peaker for maxima, thus further minimizing storage requirements to find the pitch period.