DCT-Domain Audio Watermarking Algorithm

This code implements a DCT-domain audio watermarking algorithm designed for audio media copyright protection. The algorithm embeds watermark information into audio signals to ensure copyright security, allowing copyright owners to track and verify the authenticity and originality of their work. The implementation works by embedding specific watermark signals into the Discrete Cosine Transform (DCT) domain of the audio spectrum. The watermark signal is generated based on copyright owner information and identifiers, which can be extracted when needed for copyright verification. Key implementation aspects include: - DCT coefficient modification for watermark embedding - Adaptive threshold selection for robust watermark insertion - Correlation-based watermark detection during extraction - Psychoacoustic model integration to maintain audio quality This technology provides an effective method for protecting audio media copyrights, preventing piracy and unauthorized use through imperceptible yet detectable watermark integration. The algorithm maintains a balance between watermark robustness and audio fidelity using frequency-domain transformation techniques.