Its primary use in this fashion is for secure radio communication. This work was developed into the channel vocoder which was used as a voice codec for telecommunications for coding speech to conserve bandwidth in transmission.īy encrypting the control signals, voice transmission can be secured against interception. The vocoder was invented in 1938 by Homer Dudley at Bell Labs as a means of synthesizing human speech. Early 1970s vocoder, custom built for electronic music band KraftwerkĪ vocoder ( / ˈ v oʊ k oʊ d ər/, a contraction of voice and encoder) is a category of voice codec that analyzes and synthesizes the human voice signal for audio data compression, multiplexing, voice encryption or voice transformation.
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