Title :
Digital watermarking through CDMA channels using spread spectrum techniques
Author :
Kohda, T. ; Ookubo, Y. ; Shinokura, K.
Author_Institution :
Dept. of Comput. Sci. & Commun. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
In image transmission systems using spread spectrum (SS) techniques, the main problem is how to transmit an image whose information is huge, efficiently. We have already proposed a color image communication system through code division multiple access (CDMA) channels with spreading sequences of variable-period to transmit YIQ signals. We propose a digital watermarking system where YIQ signal channels and the embedded watermark image channel are separately used. Such a system has two advantages: (1) interception on communications network is prevented; and (2) the copyright of rightful owner of digital images is protected
Keywords :
code division multiple access; copy protection; copyright; data compression; image coding; image colour analysis; multiuser channels; security of data; spread spectrum communication; telecommunication security; visual communication; CDMA channels; JPEG compression; JPEG smoothing; YIQ signal channels; code division multiple access; color image communication system; communications network interception prevention; computer network; copyright protection; digital watermarking; image transmission systems; spread spectrum techniques; variable-period spreading sequences; watermark image channel; Color; Digital images; Discrete cosine transforms; Image coding; Image communication; Multiaccess communication; Protection; Spread spectrum communication; Time division multiple access; Watermarking;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.876518
