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Lossless coding is commonly found in binary image encoding with lower compression ratio. In this paper, image segmentation is used to classify the document image into line image regions, text image regions and halftone image regions. According to different features of each region, different encoding methods are applied to improve the image compression ratio. Adaptive arithmetic coding is used for...
Classification of network traffic is basic and essential for many network researches and managements. However, classification of network traffic using port-based and simple payload-based methods is diminished with the rapid development of peer-to-peer (P2P) application using dynamic port, disguising techniques and encryption to avoid detection. An alternative method based on statistics and machine...
In the scalable video coding extension of H.264 standard, the concept of inter-layer prediction is adopted to reduce the redundancy between the base layers and the enhancement layers. Thus, additional coding modes should be calculated during the macroblock mode decision procedure at the enhancement layers. It increases the computational complexity and may obstruct its practical applications. A fast...
Scene changes and rapid motion may occur anywhere in a sequence. Commonly, the bit rate of these coded sequences fluctuates and the image quality suffers from severe degradation. If the scene changes and the rapid motion are taken into consideration in bit allocation scheme, the fluctuation of both bit rate and image quality will be reduced. In this work, an intra-frame rate-quantization (R-Q) model...
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