Title :
An improved method of embedding data into pictures by modulo masking
Author :
Hara, Kentaro ; Shimomura, Tadashi ; Hasegawa, Takaaki ; Nakagawa, Masao
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
fDate :
3/1/1988 12:00:00 AM
Abstract :
An improved scheme using vertical block allocation to embed data in industrial-quality monochrome analog pictures by modulo masking is investigated. The video signal on each scan line is sampled, and a data bit is inserted into a block of three pels by a scrambling of the luminance level of only one pel in the block. The performance of the system is compared to that of a conventional system. The number of data bits embedded in an image for the proposed system is about 1.3 times as large as that of the conventional system. In addition, the SNR (signal-to-noise ratio) of the recovered image in the proposed system is increased by about 3-4 dB
Keywords :
encoding; picture processing; protocols; video signals; SNR; industrial-quality monochrome analog pictures; luminance level; modulo masking; pels; scan line; signal-to-noise ratio; vertical block allocation; video signal; Bit error rate; Communications Society; Degradation; Facsimile; Microwave theory and techniques; Particle separators; Signal processing; Speech processing; TV; Transmitters;
Journal_Title :
Communications, IEEE Transactions on
