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Vocoders Explained

  History The vocoder was developed in 1928 by Bell Labs, and first demonstrated in 1939 at the New York World’s Fair. Its intended use was to reduce the bandwidth of voice information, allowing it to be transferred across further distances. However, the voice reproduction of these early systems were not great and they were never used for this purpose. However, they were used to send encoded messages during the second world war.   [embedyt] http://www.youtube.com/watch?v=mLKEnvsEFz8[/embedyt]   How it Works A vocoder works by analysing the sound of a modulator signal, which is usually a human voice. The modulator signal…