Apparatus for detecting movement in a television signal based on

Details Apparatus for detecting movement in a television signal based on Apparatus for detecting movement in a television signal based on

1984-09-07

1987-01-27

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358105, H04N 964

Patent

active

046397671

ABSTRACT:
A circuit for detecting the degree of movement in a television signal. The circuit is not affected by the direction in which picture elements move over the image area. Primarily, differences from frame to frame are detected as well as differences between picture elements of the same frame or picture element differences from frame to frame. The degree of image movement is determined by the ratio of the signal representing the frame difference and of a signal which represents the sum of the picture element differences. In further embodiments, image movement detection is based on detecting the brightness and/or chrominance components of the television signal and producing the frame difference signal based on these signal components or as a ratio of the frame difference signal and these signal components. The brightness (Y) signal can be extracted from the input television signal in a high frequency brightness signal extracting circuit. The frame difference signal is then based on the frame to frame difference of this high frequency Y signal.

REFERENCES:
patent: 3890462 (1975-06-01), Limb et al.
patent: 4218703 (1980-08-01), Netravali et al.
patent: 4242704 (1980-12-01), Ito et al.
patent: 4528598 (1985-07-01), Trytko et al.
Article "Estimating the Velocity of Moving Images in Television Signals" by Limb et al., Bell Telephone Laboratories, Computer Graphics and Image Processing, (1975) 4, pp. 311-327.

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