New Features Using Robust MVDR Spectrum of Filtered Autocorrelation Sequence for Robust Speech Recognition

Figure 2

The block diagram for extracting RAS-MFCC features similar to [6]. The windowing block after applying the RAS filter to the autocorrelation sequence is a DDR hamming window to compensate for the variation in dynamic range of the power spectrum of the autocorrelation sequence compared to the corresponding signal’s power spectrum. IDCT refers to inverse discrete cosine transform.