Variable block size (VBS) transform coding techniques have been proven to be capable of enhancing performance of a fixed size transform coding system. However, the criterion of determining the block size used still remains to be devised. In this paper, a new criterion for quad-tree partitioning of images based on UMRT and a new UMRT based adaptive block size transform coder are proposed. The ne...

Intra-prediction is amethod for coding standalone frames in video coding. Until now, this hasmainly been done using linear formulae. Using an Artificial Neural Network (ANN)may improve the prediction accuracy, leading to improved coding efficiency. In this degree project, Fully Connected Networks (FCN) and Convolutional Neural Networks (CNN) were used for intra-prediction. Experiments were done...

We derive novel upper and lower finite-length bounds of the error probability in joint source-channel coding when the source obeys the ergodic Markov process and the channel is a Markovian additive channel or a Markovian conditional additive channel. These bounds achieve the tight bounds in the large and moderate deviation regimes. Index Terms Markov chain, joint source-channel coding, finite-l...

A new mode selection method for intra-block coding in the H.264/MPEG-4 part 10 video-coding standard is proposed. There are nine 4 4 and four 16 16 intra-prediction modes for intra-block coding. Thus, to find the best intra-block coding mode for a 16 16 macroblock, all of the 144 (16 9) 4 4 and four 16 16 intra-modes need to be exhaustively computed and evaluated. We propose a context-based int...

An approach based on applying Delaunay triangulation to compression of mean values of image blocks that have non-identical shape and size is proposed. It can be useful for image compression methods that require the use of image partition schemes with non-equal block size like fractal and DCT-based image coding. The data about block mean values occupy a rather considerable part of total data sav...

A parallel constrained coding scheme is considered where p blocks of raw data are encoded simultaneously into q tracks such that the contents of each track belong to a given constraint S It is shown that as q increases there are parallel block decodable encoders for S whose coding ratio p q converges to the capacity of S Examples are provided where parallel coding allows block decodable encoder...

Many currently used algorithms for protein coding sequences require large learning sets of true genes to estimate sensible values for used parameters which are necessary to make the prediction reasonable. They also fail in recognition of short genes which usually contain weak coding signal. To avoid these problems, we worked out a new algorithm for finding protein coding potential in prokaryoti...

We incorporate the early zero-block detection technique into the UMHexagonS algorithm, which has already been adopted in H.264/AVC JM reference software, to speed up the motion estimation process. A nearly sufficient condition is derived for early zero-block detection. Although the conventional early zero-block detection method can achieve significant improvement in computation reduction, the P...

In this study, we introduce a new two-way relay channel and obtain an inner bound and an outer bound for the discrete and memoryless multiple access relay channels with receiver-source feedback via two-way relay channel in which end nodes exchange signals by a relay node. And we extend these results to the Gaussian case. By numerical computing, we show that our inner bound is the same with o...

We present a fast block partitioning scheme for chrominance intra prediction of the Versatile Video Coding (VVC) standard. VVC adopted several innovative tools to improve coding performance compared with its predecessor standard, enabling efficient handling emerging video content such as ultra-high definition (UHD). These improvements come at cost significant increase in complexity, mainly due ...