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Several image quality evaluation methods is analyzed, such as the conventional mathematical statistics methods, mean square error (MSE), peak signal to noise ratio (PSNR), as well as methods based on the HVS, structural similarity (SSIM), objective picture quality scale (PQS), wavelet and weighted mean square error (WWMSE), wavelet and energy -weighted mean square error (WEWMSE). The above objective...
In order to improve the speaker recognition accuracy, a new mel-frequency cepstral coefficient (MFCC) parameters extraction criterion based on F-Ratio and correlated distance criterion is proposed. Take the correlation of the characteristics into account, F-Ratio and correlated distance criterion (FRCDC) is proposed, which provides an idea about the significance of each component for MFCC feature...
An audio watermarking algorithm based on psychoacoustic model is proposed. The algorithm can resist the statistics attack. The frequency masking threshold of the audio is calculated through psychoacoustic model. The frequency masking threshold is used to estimate the strength of the watermark signal and determine the location of embedding. The watermark is embedded in a way of resistance statistics...
The conventional SVD-based watermarking has been proved to be flawed by protocol attacks. An image watermarking algorithm is proposed based on media hash. Instead of using randomly Gaussian sequence as watermark, a meaningful text message modulated by media hash sequence is used. Theoretical analysis results show that the proposed algorithm solves the problem of protocol attack, while keeping all...
In order to improve the speaker recognition accuracy, the pitch is applied to GMM-based speaker recognition (SR). The circular average magnitude difference function (CAMDF) method is used to extract the pitch. An endpoint detection method based on the pitch is proposed. The following four features are selected as the features of the SR: the mel-frequency cepstral coefficient (MFCC) based on the pitch,...
A new objective image quality evaluation method is proposed based on DWT and HVS (Human Visual System). The sensitivity of HVS is weighted with both subband and its energy. In order to verify the reliability of WEWMSE method and to demonstrate the effectiveness, image quality evaluation experiments based on the proposed method are performed on a set of images after JPEG and JPEG2000 compression. The...
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