In recent years face recognition has been the important factor in biometric authentication. Significant progress has been made in the area of face spoofing detection. In practical application, the problem of spoofing attacks can be threatened to face biometric systems which is used for authentication. Kernel Discriminate Analysis(KDA) is effective in detecting the face spoofing detection. Kerne...

Several information-theoretic studies on channels with output quantization have identified the capacity-achieving input distributions for different fading 1-bit in-phase and quadrature (I/Q) quantization. However, an exact characterization of distribution multi-bit phase has not been provided. In this paper, we consider four channel models at identify optimal each model. We first a complex Gaus...

Vector Quantization (VQ) has been extensively used in speech vocoders. Phase information is often ignored or coarsely represented in parametric coders because of the difficulties facing phase quantization. This paper introduces a novel distortion measure for the low-band speech signal that takes phase information into consideration, with no increase in the bit-rate. This measure has been used i...

As the international video coding standard, MPEG-2 has been widely used in today’s digital video applications. However, its quantization operation is complex. To simplify this operation, we propose a new algorithm for the intra frame transform-coding in this paper, instead of the conventional algorithm that using discrete cosine transform (DCT). This new algorithm is based on the all phase bior...

We propose and theoretically demonstrate the application of a specific coded modulation technique called as the Trellis Coded Modulation (TCM) to optical multilevel Differential Phase Shift Keying (DPSK) systems. In the process of identifying receiver structures for optical DPSK systems with coded modulation, it was discovered that though the parallel outputs from delay interferometer based opt...

Abstract Classical Monte Carlo simulation of the Heisenberg model poorly describes many thermodynamic phenomena due to its neglect quantum nature spins. Alternatively, we discuss how semiclassically approach problem and demonstrate a simple method for introducing locally approximate form spin quantization. While procedure underestimates magnetic short-range order, our results suggest correction...