Adaptive signal processing, machine learning, and signal modeling, indexing, searching, and retrieval, Multirate and multi-channel processing, Restoration and enhancement, Signal analysis, identification, spectral estimation, and understanding, Signal representation, compression, coding, quantization and sampling, Statistical signal processing, detection, estimation, and classification, Watermarking, encryption, and data hiding, Wavelets, filter banks, time frequency techniques. Audio, speech, image, and video processing, graphics, Biological & biomedical signals, Computer vision, Radar and lidar, Geophysical signals, Synthetic signals, Astronomical signals