| Autor: |
Sambur, M. R., Jayant, N. S. |
| Zdroj: |
Journal of the Acoustical Society of America; 1976, Vol. 60 Issue S1, pS109-S109, 1p |
| Abstrakt: |
This paper discusses several manipulations of LPC (linear predictive coding) parameters for providing speech encryption. Specifically, the paper considers temporal rearrangement or scrambling of the LPC code sequence, as well as the alternative of perturbing individual samples in the sequence by means of pseudorandom additive or multiplicative noise. The latter approach is believed to have greater encryption potential than the temporal scrarabling technique, in terms of the time needed to 'break the secrecy code.' The encryption techniques were assessed on the basis of perceptual experiments, as well as by means of a quantitative assessment of speech-spectrum distortion, as given by an appropriate 'distance' measure. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
