Blind and Robust Watermarking Framework for Audio Signals

In today's era of pervasive audio piracy, protecting audio signals' copyrights has become crucial due to widespread intellectual property violations. Prior robust digital audio watermarking techniques have emphasized robustness but often lacked imperceptibility and embedding capacity. Addressing this gap, this research introduced a highly resilient and blind audio watermarking framework based on a thresholding approach. The suggested technique generates transform parameters by applying LWT to the host signal. The bits of watermark are placed in the LH sub-band of the audio data. Experimental results highlighted the scheme's resilience against various attack types. Embedding the watermark into the LH sub-band, the given framework maintains imperceptibility with Signal-to-Noise Ratio (SNR) between 38 to 42 dB and NCC values of 1 under no attack. Comparative analysis showcases its resilience against multiple attacks, as demonstrated by the NCC values either equal or close to 1. Furthermore, this framework demonstrates an impressive payload capacity of 178.08 bps, underscoring its substantial capability in embedding data.