The problem of change detection/diagnosis in signals and systems has received considerable attention during the last two decades in a research context and appears to be at the heart of Yarious application domains such as: speech processing, image processing, automatic analysis of biomedical signals, signal processing in cars, digital data transmission systems, underwater acoustics, geophysics, failure detection in controlled systems (aeronautics, chemical and nuclear processes, event- detection of incident on freeways), econometrics, etc
by Michele Basseville and Igor V. Nikiforov