Design of IIR All-Pass Filter Based on Cochlear Delay to Reduce Embedding Limitations

We investigated how the proposed approach with inaudible digital-audio watermarking based on cochlear delay (CD) could be implemented to produce an efficient architecture to further reduce embedding limitations. We also improved our approach by controlling parameter b for time varying CD filters and designing a cascade architecture for these filters. The results revealed that the improved method could be used to reduce sound distortion due to watermarking. We also found that embedding limitations with the improved method involved those with a parallel architecture.