Implementation of cryptology algorithms in high bit rate systems

Hardware Implementation of Wireless Bit Rate Adaptation

This thesis presents a hardware implementation of the SoftRate bit-rate adaptation protocol. SoftRate is a new bit-rate adaptation protocol, which uses per-bit confidence hints generated by the convolutional decoder to estimate the channel bit-error rate. Implementing SoftRate requires changes to both the physical and media access control layers. which precludes using existing commodity 802.11 ...

Optical Test Platform for High Bit Rate DWDM Systems

The purpose of this paper is to present an optical test platform for high bit rate DWDM systems. The developed platform is transparent and independent of the format of the optical signals, number of WDM channels and transmission ratios. It enables the laboratory simulation of real systems with multi-wavelength and high bit rates optical networks.

Low Bit-Rate Video Systems

In this paper, the importance of including small image features at the initial levels of a progressive second generation video coding scheme is presented. It is shown that a number of meaningful small features called details should be coded, even at very low data bit-rates, in order to match their perceptual significance to the human visual system. We propose a method for extracting, perceptual...

Number Theoretic Algorithms and Cryptology

High - Order Motion Compensationfor Low Bit - Rate

The concept of high-order motion compensation is introduced. It is argued that in hybrid video coding, motion-compensated prediction has to be viewed as a source coding problem with a delity criterion. Based on our considerations, various high-order motion compensation approaches are presented that achieve signi-cantly improved video coding results. The designed motion-compensated predictors ac...