vocoder

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vocoder

[vō′kōd·ər]
(electronics)
A system of electronic apparatus for synthesizing speech according to dynamic specifications derived from an analysis of that speech.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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 It might be outdated or ideologically biased.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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

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.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
These better vocoders permit more subscribers to be served
I was never comfortable with it, and so the vocoder came with the idea of being able to not only be comfortable playing live, but being able to get exactly what I wanted out of my voice.
Vocoders, Digitalised Female Identity and Camp', Popular Music, 20, 3 (2001): 337.
We fuse live guitars, bass, percussion, samplers, vocals and vocoders to produce a fresh approach to a traditional DJ set, performing our own original tracks, mashed together with bootlegs and acappellas.
Other features include two-way Short Messaging Service (SMS) capabilities; simple and mobile IP; CDMA UDP Passive Server; TCP/IP protocol stack; AT command interface; socket interface, dual UARTs; analog audio; GPS and RF connectors; high-speed packet and circuit-switched data; and support for both 13k QCELP and EVRC vocoders.
According to the company, the new features of the release 2.08.0 include: extended list of supported VoIP vocoders, including G.729, G.723, and G.726, in addition to the already supported G.711; full hybrid VoIP/TDM capabilities without the use of an external gateway; full SIP proxy server and registrar server support; up to ten full message sets for multiple language support; and expanded support for DNIS conferences.
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.
Other features and functions include two-way Short Messaging Service (SMS) capabilities; simple and mobile IP; AT command interface; dual UARTs; analog audio; two RF connectors; high-speed packet--and circuit-switched data; and support for both 13k QCELP and EVRC vocoders.
Air have ditched the trademark vocoders of the debut and chosen to sing most of the songs themselves.
Packet loss concealment (PLC) capabilities in modern vocoders (voice coder/decoder) can conceal packet loss and discards.
VoiceDSP operates as a custom DSP with dual MACs and a customized hardware accelerator to support multi-channel speech vocoders, real-time facsimile relay, and telephony functions including line echo and acoustic echo cancellation, DTMF, CPT and caller identification.
Bearing Mirwais' electro-trickery, there's the trademark stop/start acoustics, vocoders galore and electro beats.