Watermarking

Details Watermarking Watermarking

2006-12-19

2006-12-19

Sheikh, Ayaz (Department: 2131)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C382S277000, C382S280000

Reexamination Certificate

active

07152161

ABSTRACT:
methods of embedding and detecting a watermark in an information signal (x(n), y′(n)) which are robust against sampling rate conversions of the watermarked signal (y(n)) adapts frame lengths used by an embedder and the detector, respectively, so as to preserve a constant ratio between the respective sampling rate and frame length. The frame lengths may be calculated from a greatest common divisor of a set of sampling rates providing watermarks which are robust against sampling rate conversions between any sampling rates of the set of sampling rates.

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