@conference {mmsp04:scs, title = {Revealing the true achievable rates of Scalar Costa Scheme}, booktitle = {IEEE International Workshop on Multimedia Signal Processing}, year = {2004}, month = {29 Sept - 1 Oct}, pages = {203-206}, address = {Siena, Italy}, keywords = {data-hiding, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez and Sviatoslav Voloshynovskiy} }