Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2003-11-10
2009-06-09
Kincaid, Kristine (Department: 2139)
Cryptography
Video cryptography
Video electric signal modification
C380S201000, C380S202000, C380S269000, C713S167000, C713S176000, C713S181000, C713S194000, C726S001000, C726S026000, C726S032000
Reexamination Certificate
active
07545938
ABSTRACT:
An apparatus for generating codes includes a quantization unit which generates quantization coefficients by performing discrete wavelet transform with respect to each of tiles into which an image is divided, a block division unit which divides the quantization coefficients into blocks, a Hash conversion unit which performs Hash conversion based on the quantization coefficients of each of the blocks so as to produce a Hash value for each of the blocks, a digital watermark embedding unit which adjusts a parity of a quantization coefficient of interest equal to a parity of the Hash value of a block to which the quantization coefficient of interest belongs, and a coding unit which generates code sequence data by coding the quantization coefficients including the quantization coefficient whose parity is adjusted.
REFERENCES:
patent: 6192139 (2001-02-01), Tao
patent: 6571071 (2003-05-01), Kanoshima et al.
patent: 6618489 (2003-09-01), Miyashita
patent: 6647127 (2003-11-01), Aoshima et al.
patent: 6671407 (2003-12-01), Venkatesan et al.
patent: 6674982 (2004-01-01), Saitoh et al.
patent: 2001/0050778 (2001-12-01), Fukuda et al.
patent: 2002/0146123 (2002-10-01), Tian
patent: 2002/0159644 (2002-10-01), Sakuyama
patent: 2003/0095272 (2003-05-01), Nomizu
patent: 2003/0137695 (2003-07-01), Nomizu
patent: 2005/0053239 (2005-03-01), Nomizu et al.
Japanese Electronic Industry Development Association, 4 pages table of contents, 3 to 37, 50 to 63, 72 to 87 and 94 to 99, “Investigative Report of Digital Watermark Technology”, Mar. 1999.
Nikkei Business, pp. 68-70, “Prevention of Illegal Coping of Electronic Information”, Feb. 23, 1998.
U.S. Appl. No. 12/047,839, filed Mar. 13, 2008, Kodama.
Hara Junichi
Kodama Taku
Matsuura Nekka
Miyazawa Toshio
Nishimura Takayuki
Jackson Jenise E
Kincaid Kristine
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
LandOfFree
Digital watermarking which allows tampering to be detected... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital watermarking which allows tampering to be detected..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital watermarking which allows tampering to be detected... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4095742