High Performance G.728 Vocoder

Toronto, Canada, March 06, 2010 --(PR.com)-- GAO Research Inc. (www.GAOResearch.com) has released its G.728 vocoder implementing the low delay code-excited linear prediction (LD-CELP) speech compression technique specified in the ITU-T standard. The software encodes 5 sample frames of 16-bit linear PCM data into 10-bit code words and employs backward-adaptive linear predictive coding analysis to achieve a low transcoding delay. It provides approximately 4kHz speech bandwidth.

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. (www.GAOResearch.com) 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 http://www.GAOResearch.com for more information.

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