Data processing apparatus, data processing method, and program

Details Data processing apparatus, data processing method, and program Data processing apparatus, data processing method, and program

2006-06-13

2006-06-13

Wu, Jingge (Department: 2623)

Image analysis

Applications

C380S201000, C380S203000, C386S349000, C399S366000

Reexamination Certificate

active

07062068

ABSTRACT:
A copy control technique using digital watermark information, which makes it possible to prevent a content from being erroneously subjected to a copy control process according to wrong copy control information at a content-to-content transition. Copy control information in the form of digital watermark information (WM) is embedded in a content to control copying of the content in accordance with the embedded copy control information. A content-to-content transition is detected by detecting a change in a content state, such as a change in image luminance, or a change in copy control information associated with a content, or is detected on the basis of a flag, a descriptor, or channel switching. In response to detection of a content-to-content transition, a reset signal is output to a WM analyzer to reset current copy control information into a “undefined” state, so that copy control is performed in a mode such as a copy-free mode assigned to the “undefined” state.

REFERENCES:
patent: 6285774 (2001-09-01), Schumann et al.
patent: 6556774 (2003-04-01), Tsumagari et al.
patent: 6577811 (2003-06-01), Kikuchi et al.
patent: 6590998 (2003-07-01), Rhoads
patent: 6912652 (2005-06-01), Ito et al.

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