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G.729, G.729A and G.729AB Speech Vocoders

Each of the vocoders offer easy integration into other systems, minimal software maintenance and a smooth upgrade path for next-generation customer products. They compress 8kHz CODEC or linear audio data to 8kbps. These vocoders operate on 10ms frames with short algorithmic delays and deliver toll quality speech.

The implementation of these vocoders pass all ITU-T test vectors. 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. Visit for more information.

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