NASA NTRS · 19670000570
Analog voicing detector responds to pitch
Abstract
Modified electronic voice encoder /Vocoder/ includes an independent analog mode of operation in addition to the conventional digital mode. The Vocoder is a bandwidth compression equipment that permits voice transmission over channels, having only a fraction of the bandwidth required for conventional telephone-quality speech transmission.
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Abel, R. S., Watkins, H. E.. 1967-12-01. Analog voicing detector responds to pitch. https://ntrs.nasa.gov/citations/19670000570
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