Cepstral distance

1. What is cepstral distance?
2. How is cepstral distance technique different from weighted cepstral?
3. What are cepstral features?

What is cepstral distance?

In general, cepstral distance is applied to measuring the similarity between two frames of signals. In this article, it represents the similarity between emotions. Figure 2 shows cepstral distance between one angry utterance and its corresponding neutral utterance.

How is cepstral distance technique different from weighted cepstral?

The weighted cepstral distance measure provides substantially better results than the Euclidean cepstral dis- tance measure and significantly better results than the log likelihood ratio distance measure. A confusion matrix of digit errors, for the data of DB-3, is shown in Table 11.

What are cepstral features?

The cepstrum is a representation used in homomorphic signal processing, to convert signals combined by convolution (such as a source and filter) into sums of their cepstra, for linear separation. In particular, the power cepstrum is often used as a feature vector for representing the human voice and musical signals.