Fractal coding of digital images ooers many promising qualities. However the coding process suuers from the long search time of the domain block pool. In this paper, we obtain mathematical results on the distance measure used in the search. Then we derive an incremental procedure to bound the domain block pixels. We arrange the domain blocks in a tree structure, and utilise the procedure to dir...

In this paper, we investigate the performance of the downlink of a wideband code division multiple access system employing space-time block coding in a time-varying multipath channel. Space-time block coding is applied at the chip level to improve the robustness of the system to fading envelope variations. Simulation results show that the presented scheme offers considerable diversity gain even...

The most recent video coding standard H.264 has adopted context-based adaptive variable-length coding (CAVLC) as the entropy coding tool in the baseline profile. By combining an adaptive variable-length coding technique with context modeling, we can achieve a high degree of redundancy reduction. However, CAVLC in H.264 has a weakness that the correct prediction rate of the variable-length codin...

In this article, an efficient vector quantization (VQ) scheme called side-match finite-state vector quantization with adaptive block classification is presented for image compression. It makes use of edge information contained in image in additional to the average values of blocks forming the image. In order to achieve low bit rate coding while preserving good quality images, neighboring blocks...

Space-time block coded OFDM is capable of achieving substantial diversity gains, while supporting high bit-rates in wireless communications. By concatenating a space-time block coded OFDM scheme with powerful channel codes, the performance of the system can be further enhanced. In this contribution both Low-Density Parity-Check (LDPC) coding and turbo coding assisted G2 space-time block coded O...

In this paper, it is considered the image compression scheme, in which a part of coded data extracted in the coding process is hidden into the other parts of coded data of own image, especially into the block address data of the best matching block within restricted blocks. The proposed scheme is able to be used in a fractal image coding in which the best matching domain block is searched, in a...

In this paper, we propose an adaptive predictive coding method based on image segmentation for lossless compression. MAR (Multiplicative Autoregressive) predictive coding is an efficient lossless compression scheme. Predictors of the MAR model can be adapted to changes in the local image statistics due to its local image processing. However, the performance of the MAR method is reduced when app...