Motion detection circuit and method using spatial information.

摘要

A motion detection circuit and method using spatial information obtains the correlation information in various directions on a field which is advantageous for motion detection performance, and compares the obtained correlation information with a value corresponding to a previous frame, thereby effectively using a frame memory to accurately detect the motion. The motion detection circuit uses a number of line memories and delays, thereby delaying an input signal and making the delayed signal into a form of samples necessary for extracting spatial correlation information, and obtaining a subtraction value of the sample signals, comparing the subtraction value with a reference value, and extracting spatial correlation information of a number of bits. Also, the motion detection circuit uses a comparator, thereby comparing proper bit spatial correlation information with a value corresponding to a previous frame stored in a frame memory and determining whether the input signal is in a motion domain or a still domain. Accordingly, degradation of a picture quality can be removed, and an amount of hardware can be reduced.