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Block-Based Steganographic Algorithm Using Modulus Function and Pixel-Value Differencing 认领 引用 被引量：3
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作者 Ahlam K. Al-Dhamari Khalid A. Darabkh 《Journal of Software Engineering and Applications》 2017年第1期56-77,共22页
The main purpose in developing the steganographic algorithms lies in achieving most of the steganographic objectives which comprise the embedding capacity, imperceptibility, security, robustness and complexity. In thi... The main purpose in developing the steganographic algorithms lies in achieving most of the steganographic objectives which comprise the embedding capacity, imperceptibility, security, robustness and complexity. In this paper, we propose a high quality steganographic algorithm using new block structure which makes a good use of both modulus function and pixel-value differencing, namely, MF-PVD. We have made many experiments with various test images from several galleries, such as USC-SIPI and UWATERLOO-LINK. The performance of our proposed algorithm is verified using three different performance metrics which include peak signal-to-noise ratio (PSNR), structural similarity index measure (SSIM), and embedding capacity (EC). Experimental results and comparisons with six pertinent state-of-art algorithms are given to prove the validation and efficiency of the proposed algorithm. 展开更多
关键词 Data Hiding Steganography Watermarking Pixel-Value Differencing Modulus Function Performance Metrics
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Performance Study of Mobile TV over Mobile WiMAX Considering Different Modulation and Coding Techniques 认领 引用
2
作者 Jamil Hamodi Ravindra Thool +2 位作者 Khaled Salah Anwar Alsagaf Yousef Holba 《International Journal of Communications, Network and System Sciences》 2014年第1期10-21,共12页
With the advent of the wide-spread use of smart phones, video streaming over mobile wireless networks has suddenly taken a huge surge in recent years. Considering its enormous potential, mobile WiMAX is emerging as a ... With the advent of the wide-spread use of smart phones, video streaming over mobile wireless networks has suddenly taken a huge surge in recent years. Considering its enormous potential, mobile WiMAX is emerging as a viable technology for mobile TV which is expected to become of key importance in the future of mobile industry. In this paper, a simulation performance study of Mobile TV over mobile WiMAX is conducted with different types of adaptive modulation and coding taking into account key system and environment parameters which include the variation in the speed of the mobile, path-loss, scheduling service classes with the fixed type of modulations. Our simulation has been conducted using OPNET simulation. Simulation results show that dynamic adaptation of modulation and coding schemes based on channel conditions can offer considerably more enhanced QoS and at the same time reduce the overall bandwidth of the system. 展开更多
关键词 Mobile TV QoS Adaptive Modulation and Coding WiMAX OPNET
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