Extended Bipolar Echo Kernel for Audio Watermarking

In echo hiding, watermark data is embedded into the host signal by introducing echoes of different delays and is subsequently extracted using cepstral analysis. The choice of echo kernel determines the fidelity and robustness performance of the watermarking scheme. In this paper we propose the extended bipolar echo kernel, which greatly improves the fidelity of the watermarked signal without compromising the detection performance.