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High Performance G.728 Vocoder

The ITU-T G.728 standard specifies the encoding of 8kHz sampled speech signals for transmission over a 16kbps channel. It uses backward adaptation of predictors and gains to achieve an algorithmic delay of 0.625ms. This software is well-suited for applications including digital circuit multiplication equipment, videoconferencing, digital telephony, and multimedia products. The vocoder runs on most commercially available DSPs/microprocessors and most popular real time operating systems.

About GAO Research Inc.

GAO Research Inc. ( is a recognized international leading provider of communications software to telecom and electronics companies and provides the most comprehensive and unique suite of modem, fax, telephony, speech software, VoIP, FoIP, fax relay and fax/modem/voice relay software for embedded applications for DSP and microprocessors.

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