VQVAE Unsupervised Unit Discovery and Multi-scale Code2Spec Inverterfor Zerospeech Challenge 2019
Table 2: Direct feature representation (MFCC and Mel-spec) result on ABX with DTW cosine distance and bit rate.
['[BOLD] Feature', '[BOLD] ABX', '[BOLD] Bit rate']
4.3.1 Direct feature representation We directly evaluated the ABX and the bit rate of Mel-spectrogram and MFCC as speech representations. In our preliminary experiments, MFCC produced better performances on the ABX metric than the Mel-spectrogram. Therefore, for the rest of our discussion, we only focus on utilizing MFCC features. However, even the MFCC has better ABX score, the bit rate still remains too high.