• Jyotin Prakash
• Dr.Karuna Markam
• Madhav Singh

Watermarking is a technique in which some watermark is embedded into the original record (can be image or audio) and this watermarked original record is distributed in the market. This helps in distinguishing between the original record and pirated record because an algorithm can be applied on distributed record to extract watermark, if it is the same watermark as we have embedded then it means record is original else it is pirated record. In audio watermarking, EMD (Empirical mode decomposition) technique with QIM (Quantization Index Modulation) modulation is very popular technique where EMD breaks the original audio signal into multiple IMFs (Intrinsic Mode Function) and then watermark image is embedded into the original audio signal using QIM modulation. QIM modulation technique makes use of two different step sizes to embed the watermark image. In proposed work, quantization step size pair is varied to find the PSNR & BER and it is found that when pair of quantization step size is varied, it increases the value of PSNR and decreases BER.

EMD (Empirical mode decomposition), Audio watermarking, IMF (Intrinsic Mode Function), Quantization step size, QIM (Quantization Index Modulation), Watermark image, BER (Bit Error Rate), MSE(Mean Square Error),Signal to Noise Ratio (SNR).

"Performance Improvement of EMD based Audio Watermarking Technique by Varying Quantization Step Size in QIM Modulation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 5, page no.186-193, May-2020, Available :http://www.jetir.org/papers/JETIR2005335.pdf

"Performance Improvement of EMD based Audio Watermarking Technique by Varying Quantization Step Size in QIM Modulation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 5, page no. pp186-193, May-2020, Available at : http://www.jetir.org/papers/JETIR2005335.pdf