In this paper, a system architecture optimized for the 2-channel main-profile MPEG-2 AAC decoder is presented. In order to enable an efficient job scheduling and allocation, the presented system comprises three hardware modules: Huffman decoder module, predictor module, and processing core module which is programmable using an assembly language of its own. Huffman decoder is designed to finish ...

Novel coding schemes are introduced and relationships between optimal codes and Huffman codes are discussed. It is shown that, for finite source alphabets, the Huffman coding is the optimal coding, and conversely the optimal coding needs not to be the Huffman coding. It is also proven that there always exists the optimal coding for infinite source alphabets. We show that for every random variab...

Some typical security algorithms such as SHA, MD4, MD5, etc. have been cracked in recent years. However, these some shortcomings. Therefore, the traditional one-dimensional-mapping coupled lattice is improved by using idea of polymorphism this paper, and a polymorphic mapping–coupled map with information entropy developed for encrypting color images. Firstly, we extend diffusion matrix original...

• a tagging algorithm Tag : {0, 1}∗ × {0, 1}∗ → {0, 1}∗ that maps a pair consisting of a key K and messageM to a tag σ = TagK(M) = Tag(K,M). • a verification algorithm V erify : {0, 1}∗×{0, 1}∗×{0, 1}∗ → {0, 1} that takes a keyK, a messageM , and a string σ and produces a bit of output. We require that V erifyK(M,σ) = V erify(K,M, σ) if and only if σ is a possible output of TagK(M). For K ∈ {0,...

I analyze the information content of scene labels and provide a measure for the complexity of line drawings. The Huffman-Clowes label set is found to contain surprisingly little additional information as compared to more basic label sets. The complexity of a line drawing is measured in terms of the amount of local labeling required to determine global labeling. A bound is obtained on the number...

In [1], a practical joint source/channel coding algorithm was proposed for the transmission of multiple images to reduce the overall reconstructed source distortion at the receiver end within a given total bit rate. In this paper, it is demonstrated that by joint coding multiple sources with such an objective, both improved distortion performance as well as reduced quality variation can be achi...

Dr. Stephen Huffman [email protected] [Editor’s note: This paper describes a series of maps produced by Dr. Huffman using a pre-release version of GMI’s World Language Mapping System (WLMS) GIS data set. Most of these maps have been adjusted to use the current released version of the WLMS along with GMI’s Seamless Digital Chart of the World. Images of the maps, Portable Document File (PDF) files of ...