Source code with cost as a nonuniform random number generator

An Information-Theoretic Study on Variable-Length Source Coding with Unequal Cost

– Abstract – In the variable-length source coding, we may consider vary zestful problem as follows: If each code symbol is given prescribed cost to transmit or record, what code is optimal? This problem is substantial from not only theoretical viewpoints but also engineering points of view. Because, in practical systems of communication or recording , it may reasonable to consider unequal costs...

Random Bit Flipping and EXIT Charts for Nonuniform Binary Sources and Joint Source-Channel Turbo Systems

Joint source-channel turbo techniques have recently been explored a lot in literature as one promising possibility to lower the end-to-end distortion, with fixed length codes, variable length codes, and (quasi) arithmetic codes. Still, many issues remain to be clarified before production use. This short contribution clarifies very concisely several issues that arise with EXIT charts and nonunif...

A High Gain Bipolar Pulse Generator with Low Voltage Input Source

This paper proposes a pulsed power generator which consists of two types of switched-capacitor booster modules. A doubling mode module employed to elevate the input voltage to a specified level and, constant mode module is used to increase the elevated voltage into the finally intended bipolar output voltage. Also, the proposed modular structure does not utilize any switches across the load. Ot...

A Hardware Efficient Random Number Generator for Nonuniform Distributions with Arbitrary Precision

Nonuniform random numbers are key for many technical applications, and designing efficient hardware implementations of nonuniform random number generators is a very active research field. However, most state-of-the-art architectures are either tailored to specific distributions or use up a lot of hardware resources. At ReConFig 2010, we have presented a new design that saves up to 48% of area c...

An automatic code generator for nonuniform random variate generation