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In this paper, a kind of clipping detection method for audio signal is proposed based on kernel Fisher discriminant (KFD) in MDCT domain. The kernel method and the Fisher linear discriminant analysis (FLDA) are introduced to the proposed method. First, the clipping and non-clipping feature parameters are extracted using MDCT coefficients of audio signals. Next, the optimal projection vector and the...
This paper introduces a new method to calibrate data collected using Electro-Magnetic Articulography (EMA) into an appropriate articulatory space. A bite plate record for a target subject is used to define the maxillary occlusal and midsagittal planes, and then a single quaternion rotation is derived to transform the dataset into the new anatomically referenced space. The choice of specific rotation...
High Efficiency Video Coding (HEVC), a successor to H.264, is the next generation video compression standard. To enhance the coding efficiency of video frames, 35 intra prediction modes adopted in Prediction Unit (PU) from 4×4 to 64×64 of HEVC. However, the improvement is based on the cost of rapid increased complexity performance loss. This paper proposed a Pixel Gradient Statistics (PGS) and Mode...
This paper proposes an improved Doppler Beam Sharpening (DBS) algorithm for missile-borne Synthetic Aperture Radar (SAR) based on Doppler localization equations, to gain a better azimuth resolution and reduce the heavy localization computation afford. Firstly, the azimuth resolution is improved by a modified reference function, with little extra computation. Then Doppler localization equations are...
Scans of double-sided documents often suffer from show-through distortions, where contents of the reverse side (verso) may appear in the front-side page (recto). Several algorithms employed for show-through removal from the scanned images, are based on linear mixing models, including blind source separation (BSS), non-negative matrix factorization (NMF), and adaptive filtering. However, a recent study...
In this paper, we present a no-reference image quality assessment method, which we call BNB (an acronym for Blurriness, Noisiness, Blockiness). Our BNB method quantifies blurriness, noisiness and blockiness of a given image, which are considered three critical factors that affect users' quality of experience (QoE). The well designed BNB metrics are based on the observation that the difference between...
1This paper proposes a fast intra prediction mode decision strategy for HEVC (High Efficiency Video Coding), which aiming at reducing computation time and keeping the coding performance at the same time. Using a notation of a circle, we arrange the candidate modes into different groups. The order of processing MPM(most probable modes) and RMD(rough mode decision) is discussed, which helps a better...
In this paper, the property of spatial shift operation on image reconstruction from amplitude and phase information in two-dimensional Fractional Fourier Transform (2D-FRFT) is studied through mathematical analysis and computer simulations. From the analysis presented in this paper, the phase information is spatial shift-invariant for image reconstruction in the 2D-FRFT domain while the amplitude...
Spacial variability of Received Signal Strength measurements (RSS) is the fluctuation of measured RSS at a fixed location in difference time, which is the main reason for low accuracy and bad robustness of some existing indoor localization techniques. In this paper, we proposed a novel approach to eliminate space variability of RSS in indoor localization. The merits of our proposed method is twofold...
Orthogonal waveform design is quite an important issue for waveform diversity systems. A chaos based method for orthogonal discrete frequency coding waveform (DFCW) design is proposed in this paper to overcome the insufficient orthogonal waveforms and their finite coding length. Correlation properties of the designed signals are analyzed. Premises for chaos choosing and frequency quantification method...
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