Title	New Approach to Optimize a Sigma Delta Modulator
Author	Dadi Mohamed b?chir, Bouallegue Ridha, Ezzeddine taher
Citation	Vol. 7  No. 6  pp. 250-253
Keywords	Dither, GSM, sigma-delta modulator

Title	Robust Digital Watermarking Scheme using Contourlet Transform
Author	B.Chandra Mohan, S.Srinivas Kumar
Citation	Vol. 8  No. 2  pp. 43-51
Keywords	Digital image watermarking, Contourlet Transform, Multiple description coding, dither quantization