TY  - JOUR
T1  - Improving Speech Signal Encryption by Using Compression along with Encryption According to Wavelet Transform, Discrete Cosine Transform and Symmetric Permutation Methods
AU - Shirazi, Jalil AU - Hosseinzadeh, Vahid 
JO  - Journal of Engineering and Applied Sciences
VL  - 11
IS  - 4
SP  - 862
EP  - 869
PY  - 2016
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2016.862.869
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2016.862.869
KW  - compression
KW  -spectrograph
KW  -discrete wavelet transform
KW  -discrete cosine transform
KW  -Asymmetric permutation
AB  - This study,aims at increasing the security level of the speech signal using both the encryption and compression of signals. Initially, it has done an overview of some encryption and compression methods of speech signal. Then, a new signal with an isolation property for high and low frequencies of speech has made by using discrete wavelet and discrete cosine transform and the signal is used for encryption. The new signal has compressed the coefficients on high and low indices; thereby, the possibility of compression is also provided. Results showed that the level of security in encrypted and compressed signal has reasonably increased compared to the previous methods and deciphering has become more difficult.
ER  -