Fast mode decision algorithms in video intra coding are very useful and necessary for implementing practical real-time performance of the encoder. It can reduce the computational complexity by excluding impossible modes from candidate set. Anyway, most of these algorithms may give rise to the remarkable quality degradation, especially for the all intra coding scenario. In order to improve the e...

In the present work, a relatively novel method called attractor image coding (commonly known as fractal image coding) for lossy image compression is investigated. Roughly speaking, the original image is partitioned into several disjoint range blocks. For each range block, an a ne transformation is constructed to approximate the range block by another part of the same image. Compression is obtai...

This paper proposes an adaptive block-size motion alignment technique in 3D wavelet coding to further exploit temporal correlations across pictures. Similar to B picture in traditional video coding, each macroblock can motion align from forward and/or backward for temporal wavelet de-composition. In each direction, a macroblock may select its partition from one of seven modes – 16x16, 8x16, 16x...

In this paper, a simple technique for encoding fractional bit components used in fixed-rate Gaussian mixture model-based (GMM) block quantisers is presented. While block transform image coding has not been very popular lately in the presence of current state-of-the-art wavelet-based coders, the GMM-based block quantiser, without the use of entropy coding, is still very competitive in the class ...

In this paper, we propose a rate-compatible (RC) parallel concatenated punctured polar (PCPP) codes for incremental redundancy hybrid automatic repeat request (IR-HARQ) transmission schemes, which can transmit multiple data blocks over a time-varying channel. The PCPP coding scheme can provide RC polar coding blocks in order to adapt to channel variations. First, we investigate an improved rand...

ABSTRACT In this paper, we show the equivalence of Space-Time block coding to multipath propagation with respect to Cyclic Delay Diversity for OFDM systems. Hence, we can apply existing Space-Time code design criteria and analyze methods for Space-Time code construction using Cyclic Delay Diversity OFDM systems in multipath propagation environments. i.e. terms like "diversity gain" and "coding ...

It has been asserted that temporal subband coding (TSB) is inferior to predictive coding for regionally motion compensated (e.g. block-based MC) temporally scalable compressed video [1]. There are two major disadvantages of TSB coding: temporal ltering distortions, and `open-loop' predictive coding of covered and uncovered regions. The `open-loop' structure of TSB coding, however, a ords two ma...

three dimensional- high efficiency video coding (3D-HEVC) is the expanded version of the latest video compression standard, namely high efficiency video coding (HEVC), which is used to compress 3D videos. 3D videos include texture video and depth map. Since the statistical characteristics of depth maps are different from those of texture videos, new tools have been added to the HEVC standard fo...