Fig. 6From: Effective blind speech watermarking via adaptive mean modulation and package synchronization in DWT domainThe effect due to the use of various αs. Subplot a presents the SNRs observed in the second-level approximation subband and time-domain signal. Subplot b delineates the MOS-LQO scores. Subplot c is the result when the watermarked speech is corrupted by white Gaussian noise with SNR = 20Back to article page