An Optimized Spatial Data Hiding Scheme Combined with Convolutional Codes and Hilbert Scan

Authors:
Zhiyan Du;Yan Zou;Peizhong Lu
Affiliations:
-;-;-
Venue:
PCM '02 Proceedings of the Third IEEE Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
Year:
2002

Citing 4
Cited 1

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Abstract

This paper presents a new watermarking scheme, which is combined with convolutional codes and Hilbert scan in spatial domain. Our method considerably improves the capacity of watermarks and the robustness of the system as well, compared with the present watermarking systems. Human Visual System (HVS) is applied adaptively in the embedding step. Watermarks are modulated by pseudo-random sequences for precise detection and security purposes. When convolutional code is employed, we adopt soft-decision Viterbi decoding algorithm to achieve lower bit error rate (BER). Our experiments show that choosing suitable convolutional codes can considerably alleviate the trade-off between the capacity and the robustness. This algorithm is also computationally simple so that the information can be extracted without the original image in real time in video watermarking.