Frequency Localized Temporal processing

At the very front-end of VoicePredict lies TravellingWave's proprietary signal processing module called RAGs Algorithm (Rao-Aronov-Garafutdinov speech processing algorithm). It is based on published research on compact features modeling the traveling wave phenomena in the human cochlea.

RAGs extracts modulation information from speech, as opposed to traditional power spectrum analysis. For example, instead of relying on the spectral energy envelope, RAGs computes the locations of several resonances (similar to speech formants); their slowly varying temporal trajectories; rich modulations coding the harmonics around those resonances; local bandwidths, syllable onset and offset times; durations of phones and other proprietary acoustic-phonetic features.

RAGs output is then employed by the acoustic-phonetic models to make decisions about word prediction. Overall, this enables VoicePredict system to perform reliably in a variety of noisy environments.