1. A method, comprising: extracting deep scattering spectral features from an acoustic input signal to generate a deep scattering spectral feature representation of the acoustic input signal; inputting the deep scattering spectral feature representation to a speech recognition engine; and decoding the acoustic input signal based on at least a portion of the deep scattering spectral feature representation input to a speech recognition engine; wherein the extracting, inputting and decoding steps are executed via a computer system comprising a processing unit and a memory.