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7-kHz Audio Transmission Over One Analogue Telephone Line

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The paper describes a codec designed to transmit compressed audio over a standard telephone line via a V34 modem. To compress 7-kHz bandwidth audio into 24 kbits/s, the codec implements a new algorithm of code excited linear prediction (CELP) optimized for speech.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=7285

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AES - Audio Engineering Society