Abstract:
Families of periodic arrays are useful in a variety of applications, including multiple target recognition, optical communications, and digital watermarking. In video watermarking, these arrays can be employed as watermarks to ensure copyright protection and to verify the authenticity of the original video. In video watermarking, watermarks based on periodic arrays can be embedded into video frames in an imperceptible manner while remaining detectable without requiring access to the original content. Detection is achieved through cross-correlation between the watermarked frames and the watermark arrays, and its reliability depends on the presence of a dominant correlation peak. This is ensured by designing array families with a unique high auto-correlation peak, low off-peak auto-correlation and cross-correlation values, and high linear complexity for cryptographic security. In this talk, we present four families of periodic arrays based on composition that we have proposed. We establish their theoretical properties, including a high ratio between peak and off-peak correlation values, high linear complexity, and optimal low cross-correlation values with respect to the Welch bound.
Place: Monzón 201
Hour: 2:00 p.m.