We consider the admission problem for the two class M/M/C/C queueing system. The admission policy is coded as a binary string and strings which produce good policies are found using genetic algorithms. We use three policy coding methods: Direct codes: The policy consists of a sequence of 2-bit words, corresponding to the admit/deny decision for each class, associated with each state. The result...

Abstruct-Encoding and decoding schemes for concatenated multilevel block codes are presented. By one of these structures, a real coding gain of 5.6-7.4 dB for the bit error range of lop6-lo-' is achieved for transmission through the additive white Gaussian noise channel. Also, a rather large asymptotic coding gain is obtained. The new coding schemes have very low decoding complexity and increas...

In this paper, we present a novel fractal coding method with the block classification scheme based on a shared domain block pool. In our method, the domain block pool is called dictionary and is constructed from fractal Julia sets. The image is encoded by searching the best matching domain block with the same BTC (Block Truncation Coding) value in the dictionary. The experimental results show t...

BLOCK TRIANGULAR PRECONDITIONERS FOR -MATRICES AND MARKOV CHAINS MICHELE BENZI AND BORA UÇAR Abstract. We consider preconditioned Krylov subspace methods for solving large sparse linear systems under the assumption that the coefficient matrix is a (possibly singular) -matrix. The matrices are partitioned into block form using graph partitioning. Approximations to the Schur complement are used t...

Network coding (NC) has been regarded as a promising technology for throughput improvement in wireless networks, so a thorough understanding on the possible throughput gain from using NC is essential for the application of such technology. Available studies of throughput gain from NC, which mainly focus on only coding sub-layer or both MAC layer and coding sub-layer but largely neglect the prim...

In this paper, new techniques for the DCT image coding based in pixels classifications are proposed. Two image coding approaches based on the object extraction are presented to study the effect of the object based image coding on the compression quality. Moreover, modification of the traditional JPEG method based on Region-of-interest coding is achieved. In the beginning, the image is subdivide...

We consider the problem of coding video signals using motion compensation and a forward coded dense motion eld. First, we develop a motion estimation technique that yields dense estimates suitable for the coding application; next, we develop a prototype of a video coder, which we use to verify that high coding performance is attainable within our framework. To nd our sought motion estimates, we...

This demonstration aims to present a testbed of an advanced network coding scheme, pipeline network coding, for multicast streams. Conventional network coding approaches are mostly based on a block-based coding scheme. The block-based coding scheme (batch coding scheme) introduces noticeable coding delay as well as results in discarding generations that have not enough coded packets received. T...