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Table 1 Residual intelligibilities of processed signals at different compression rates and the corresponding MOS scores of the recovered speech

From: Scrambling-based speech encryption via compressed sensing

Compression rate (%) 5 6 7 8 9 10
ρ CoS 0.964 0.967 0.957 0.959 0.975 0.967
ES 0.326 0.335 0.342 0.372 0.347 0.364
MOS 2.42 2.49 2.54 2.63 2.73 2.96