@conference {uvigo:samplelevel, title = {Coding at the Sample Level for Data Hiding: Turbo and Concatenated Codes}, booktitle = {Security and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {4314}, year = {2001}, month = {January}, pages = {532{\textendash}543}, address = {San Jos{\'e}, USA}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Ping W. Wong and Edward J. Delp} }