Patent №
US 4,486,900
Granted
1984-12-04
Filed 1982
Owner
BELL TELEPHONE LABORATORIES, INCORPORATED
Lab
—
AI components
1
speech
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
06363470
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.
AI classification
Ownership
BELL TELEPHONE LABORATORIES, INCORPORATED
assignment · 39860900
Assignors
COX, RICHARD V., CROCHIERE, RONALD E.
On an employer assignment, the assignors are typically the inventors.