Title: Voice controlled disappearing audio delay line

Abstract: A delay line which disappears under voice control is comprised of a pluray of shift registers delays the incoming voice signal to permit transmission of the voice scrambler preamble. The delay is removed over a period of time during speech transmission by removing a segment of the delay line each time a pause of a specified length is detected in the speech.

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Inventors: Johnson, George B. (La Jolla, CA, US)

Application Number: 581060
Filing Date: 1975-05-27
Publication_date: 1976-07-20
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 380/31 380/35, 380/275
Other Classes:
US Patent Ref:

2539556	Jan, 1951	Steinberg	179/1.
3694757	Sep, 1972	Hughes	178/22.
3813493	May, 1974	Hughes	179/1.

Other Refs:
Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Kemeny, E. Matt
Attorney: Sciascia; R. S., Rubens; G. J., Phillips; T. M.