An efficient off-line coding scheme for handwriting and bilevel graphics based on quadtree segmentation and block-run run-length coding (RLC) is presented. By segmenting a captured handwriting or graphic image into variable size blocks according to the image activity inside the blocks and run-length coding on a block-run basis, the new scheme is able to achieve higher coding efficiency than the...

With fast computation and excellent compression efficiency, two embedded coding techniques, zero-tree/-block coding and context modeling of the subband/wavelet coefficients, have been widely utilized for image coding applications. In this research, we present a new embedded wavelet image coding algorithmwith an attempt to combine advantages of these two successful coding schemes. The experiment...

In this paper, we concern with designing and implementing a convolutional encoder and Viterbi decoder which are the essential block in digital communication systems using FPGA technology. Convolutional coding is a coding scheme used in communication systems including deep space communications and wireless communications. It provides an alternative approach to block codes for transmission over a...

We have developed a moving-object segmentation method for standard-compliant DCT-based video coder. To be compliant with current block-based video coding standards, the proposed algorithm uses the DCT coefficients and motion vector of a block, respectively, as spatial and temporal features of segmentation. Since block-based motion vector may not be sufficient to represent true motion of object,...

For a class of channels, called block interference channels, a paradoxical situation prevails, namely, the capacity increases but the cutoff rate decreases with an increase of the block interference length. Also, despite the large capacity, there is a degradation in the performance of practical coding schemes when the block interference length is excessive. We introduce a short-coding error par...