Audio Steganography Using Echo Hiding for Data Concealment

Below is a sample MATLAB code for echo hiding data audio steganography. You can test it using your own input: The code begins by reading an audio file using the audioread function, which returns both the audio data and sampling frequency (fs). Next, it creates an echo effect by defining parameters for delay time (0.1 seconds) and gain coefficient (0.8). The echodemo function processes the input audio to generate the echoed signal. For data concealment, a secret message string is encoded into the audio signal using a custom encode function that embeds information through echo modulation. The decoding process employs a corresponding decode function to extract the hidden message from the echo-modified audio. Signal restoration is performed by the restore function, which reverses the echo effects while preserving the original audio quality using the known delay and gain parameters. Finally, the processed audio is saved using audiowrite with the original sampling frequency. Please note that this sample code serves as a demonstration for hiding data in audio files. You should test this algorithm with your own input files and parameters, and modify it according to your specific requirements.