Hardware Implementation of Audio Watermarking Based on DWT Transform

Abstract

Presently, the duplicate copy of an audio can be generated with great ease using some smart devices, and transmitted over the internet which raises concern over copyright and privacy. Digital audio watermarking is a procedure to insert some data bits known as watermark into audio signal. Then the audio with watermark is to be transmitted to end user or made public. The proposed algorithm is used to insert a binary watermark image into a detailed coefficient of the Daubechies 9/7based DWT transform. A watermark is dispersed consistently in low frequencies, which builds the robustness and inaudibility of the watermark data. Further, the watermark is embedded into an audio signal to have robust system against audio attacks and inaudible performance. The algorithm is verified using MATLAB and subsequently implemented on FPGA hardware to verify the real-time performance. Hardware implementation helps to embed the watermark at the same instance when audio is being captured. The results show promising application for real-time audio applications.

Digital Image Decoder for Efficient Hardware Implementation

“…Lifting-based hardware architectures [ 33 , 34 , 35 , 36 , 37 , 38 ] are usually simpler, have lower computational complexity and utilize less amount of logic and memory resources. The most efficient hardware architectures of the 1-D DWT and 2-D DWT are described in [ 28 ] and [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ]. The concept of the proposed 2-D DWT with 5/3 filters and its hardware architecture are presented in [ 61 , 62 , 63 ].…”