3 Probability Coding 10 3.1 Prefix Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1.1 Relationship to Entropy . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 Huffman Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2.1 Combining Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2.2 Minim...

In this paper, two context-based entropy coding schemes for AVS Part-2 video coding standard are presented. One is Context-based 2D Variable Length Coding (C2DVLC) as a low complexity entropy coding scheme for AVS Part-2 Jizhun profile. C2DVLC uses multiple 2D-VLC tables to exploit the statistical features of DCT coefficients for higher coding efficiency. Exponential–Golomb codes are applied in...

In this paper, adaptive coding schemes for contour line drawings based on chain code representation is presented. In this scheme, the chain code or the chain-difference code of a contour is modeled as an n-order Markov sequence and then coded with arithmetic coding scheme adaptively. Experimental result shows that the proposed approach is better than some other conventional approaches.

arithmetic coding (AC) is notable for its high compression gain and high implementation cost. The coding process includes range update, renormalization, and probability estimation update. Old AC engine realized both range update and probability estimation update by multiplications or table look-up. In this paper, we replace multiples with additions by combining original domain and logarithmic d...

In this thesis we study two research aspects of geographical routing: efficient geographical addressing and a new routing scheme. In the first part we offer a novel geographical routing algorithm that relies on a well known data structure called Quadtree. Quadtree is an efficient method of mapping a twodimensional area by recursively partitioning it to disjoint squares. We present a greedy, gua...

Short message noisy network coding (SNNC) differs from long message noisy network coding (LNNC) in that one transmits many short messages in blocks rather than using one long message with repetitive encoding. Several properties of SNNC are developed. First, SNNC with backward decoding achieves the same rates as SNNC with offset encoding and sliding window decoding for memoryless networks where ...

A multiple access source code (MASC) is a source code designed for the following network configuration: a pair of correlated information sequences {Xi}lm_, and {x}lm_, is drawn i.i.d. according to joint probability mass function (p.m.f.) p ( z , y); the encoder for each source operates without knowledge of the other source; the decoder jointly decodes the encoded bit streams from both sources. ...

Arithmetic coding is a highly effective method for data compression. One of the criticisms levelled at it is that it runs fairly slowly. We propose a novel method for arithmetic coding that runs at a significantly higher speed and can be implemented using simple hardware if required.

Arithmetic coding is a data compression technique that encodes data (the data string) by creating a code string which represents a fractional value on the number line between 0 and 1. The coding algorithm is symbolwise recursive; i.e., it operates upon and encodes (decodes) one data symbol per iteration or recursion. On each recursion, the algorithm successively partitions an interval of the nu...