vocoder

[vō′kōd·ər]

(electronics)

A system of electronic apparatus for synthesizing speech according to dynamic specifications derived from an analysis of that speech.

vocoder

(communications)

Hardware or software which implements a compression algorithm particular to voice.

For example Qualcomm uses a vocoding algorithm to compresses voice data in digital communication systems such as wireless CDMA and Eudora voice attach.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

vocoder

(VOice CODER) Same as speech codec.

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Vocoder

a system of telephone communication in which the transmitted signals are not those of speech but rather of a special representation of speech in an encoded form. In this system a sound analyzer at the transmitting end forms coded signals from the speech signals; at the receiving end a synthesizer artificially restores the speech signals from the coded signals. With a vocoder it is possible to achieve a coefficient of syllabic articulation of 83 to 85 percent (this coefficient is between 90 and 91 percent for the ordinary telephone communication). The coding reduces the width of the frequency passband required for the communication channel to 250-350 hertz, as compared with the band from 250 to 3,500 hertz of the ordinary telephone communication, thus increasing the carrying capacity of a long-distance communication line by ten to 13 times.

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References in periodicals archive

The commercial and standardized vocoder types include 4.8 Kbps /2.4 Kbps Improved Multi Band Excitation coder, 4.8 ~ 8 Kbps Department of Defense Code Excited Linear Prediction coder, 8 Kbps Vector Sum Excited Linear Prediction coder, 8 Kbps Qualcomm CELP coder and 16 Kbps Low Delay CELP coder [35-40].

Signal Enhancement of a Variable Rate Vocoder with a Hybrid domain SNR Estimator

"The sensitive vocoder and powerful neural networks represented the sounds the patients had originally listened to with surprising accuracy."

Brain Signals Translated Directly Into Speech

vocoder increases system capacity by thirty-four percent while

Wireless efficiency versus net neutrality

Even before it had entered popular culture, in other words, the vocoder had sutured to the body and the body politic.

Software sequencers and cyborg singers: popular music in the digital hypermodern

AudioCodes blades and media gateways (TrunkPack and Mediant) are converged media gateways that support a variety of Vocoders and Signaling technologies to comply with a multitude of access networks, such as PSTN, Packet Cable, WiFi, GSM, UMTS, CDMA and 3G networks.

AUDIOCODES AND IBM LAUNCH IP MULTIMEDIA SUBSYSTEM SOLUTIONS

Packet loss concealment (PLC) capabilities in modern vocoders (voice coder/decoder) can conceal packet loss and discards.

Manage VoIP quality and performance. (Guest Column)

Five years later, in 1968, Harig reworked Bense's text into a radio play, inserting documentary material between Terri Jo's digitally produced locutions, which were performed by a vocoder.

Ludwig Harig, The Trip to Bordeaux

(Drawing) Rings Around the World brings to mind the Beach Boys, Receptacle For The Respectable is more Marilyn Manson than anything else, the single Juxtaposed With U features singer Gruff Rhys duetting with a vocoder. The album is a dazzling testament to music technology.

And the winner for 2001 is. .

NOBODY'S PERFECT - A rare moment of humility from Maddy, who sings: "Nobody's perfect, what did you expect, I'm doing my best." The chorus uses the same vocoder effects that Cher used on Believe, but not in a cheesy way, and it doesn't sound too derivative.

Sean O'Brien's Hot People: MY EXCLUSIVE TRACK BY TRACK REVIEW..

Full vocoder support for both GSM and CDMA systems is available, including an end-to-end speech play-through capability.

A MULTILEVEL DESIGN ENVIRONMENT FOR WIRELESS SYSTEM DEVELOPMENT

Ascend is acquiring Voxware's core codec technology, also known as a vocoder or speech compression algorithm.

VOXWARE SELLS SPEECH-CODING TECHNOLOGY TO ASCEND

Voxware is selling what amounts to all of its current operating business off to Ascend, including its core code technology, vocoder or speech compression algorithms, and companion signal processing algorithms.

VOXWARE SELLS OFF SPEECH AND AUDIO SOFTWARE TO ASCEND