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G.728 Vocoder

High Performance G.728 Vocoder

Toronto, Canada – GAO Research Inc. ( 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.
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