Reproduction equipment, reproduction equipment specifying...

Details Reproduction equipment, reproduction equipment specifying... Reproduction equipment, reproduction equipment specifying...

2006-11-28

2006-11-28

Ahmed, Samir (Department: 2624)

Image analysis

Applications

C713S176000

Reexamination Certificate

active

07142692

ABSTRACT:
A reproduction equipment converts an identification code of the reproduction equipment into a plurality of signal sequences using a correspondence table and embeds the obtained plurality of signal sequences in AV signals as a digital watermark. A reproduction equipment specifying equipment compares correlation values of the AV signals, containing the digital watermark embedded therein with all signal sequences contained in a correspondence table. A comparison of the correlation values with a previously set threshold value determines the embedded signal sequences and the identification code of the reproduction equipment which may be extracted.

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