Device and method for embedding a secondary signal in a...

Details Device and method for embedding a secondary signal in a... Device and method for embedding a secondary signal in a...

2005-10-17

2009-02-10

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S068000

Reexamination Certificate

active

07489258

ABSTRACT:
Devices and methods, record carrier and signal for embedding, extracting, carrying and representing secondary signal such as a copy protection signal embedded in a primary signal such as a blu ray disc signal modulated by a 17PP RMTR runlength limited modulation code. Each frame comprises a frame sync patterns followed by DC control blocks each including a DC control bit. Two modulation tables are used. Each bit of the secondary signal is represented by a relationship between the polarity of the frame sync signal and the values of the DC control bits in a fashion which complies with the constraints of the modulation code and the DC control algorithm.

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ISR/Written Opinion of the International Searching Authority PCT/IB2005/053396, Oct. 17, 2005.

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