Pitch analyzer using log-tapped delay line

Details Pitch analyzer using log-tapped delay line Pitch analyzer using log-tapped delay line

1975-02-18

1976-03-30

Claffy, Kathleen H.

328 55, G10L 100

Patent

active

039476383

ABSTRACT:
A pitch analyzer is described which extracts, on a real-time or pipeline is, the pitch information from a speech signal. The analyzer converts the speech signal to a digital signal, shifts it into a delay line tapped at logarithmic intervals and constructs a measure of merit for each of many possible pitch periods. These measures are periodically transferred to a processor which combines them in a prescribed manner with previous information to select the one most-likely current value of pitch. Provision is also made, when the application warrants it, to select the best pitch value, with a delay of several frames, based on current information.

REFERENCES:
patent: 2908761 (1959-10-01), Raisbech
patent: 3069507 (1962-12-01), David
patent: 3071652 (1963-01-01), Schroeder
patent: 3344349 (1967-09-01), Schroeder

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