Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1994-01-03
1996-03-26
Chin, Tommy P.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348606, 348620, H04N 718, H04N 712
Patent
active
055024890
ABSTRACT:
The present invention is a motion adaptive spatial filtering(MASF) method for use with a image coding apparatus, which proceeds the temporal band-limitation of the video frame signals on spatial domain along the trajectory of a moving component without temporal aliasing by using a filter having a band-limitation characteristic according to a cutoff frequency. It is well known that video signal may contain a lot of temporal aliasing components because of insufficient frame sampling rate. And it is impossible to design band-limiting temporal filter simply by convolving a sequence of frames along the temporal direction. From a signal processing point of view, the aliasing degrades filter characteristics. This filtering method takes advantage of the fact that, if motion of each pixel is known, the temporal filtering can be performed in the spatial domain filtering along its trajectory. That results in de-aliasing characteristic.
REFERENCES:
patent: 4694342 (1987-09-01), Klees
patent: 4860104 (1989-08-01), Katsuyama
patent: 4890160 (1989-12-01), Thomas
patent: 4896152 (1990-01-01), Tiemann
patent: 5107348 (1992-04-01), Citta et al.
patent: 5166788 (1992-11-01), Lee
patent: 5191419 (1993-03-01), Wischermann
patent: 5245433 (1993-09-01), Sid-Ahmed et al.
patent: 5253059 (1993-10-01), Ansari et al.
patent: 5311310 (1994-05-01), Jozawa et al.
patent: 5327242 (1994-07-01), Naimpally et al.
patent: 5329317 (1994-07-01), Naimpally et al.
patent: 5333054 (1994-07-01), Tanaka et al.
patent: 5343247 (1994-08-01), Vogel
Eric Dubois et al., Noise Reduction in Image Sequences Using Motion-Compensated Temporal Filtering, IEEE Transactions on Communications, COM-32, No. 7(Jul., 1984).
Wen-Hsiung Chen et al., Recursive Temporal Filtering and Frame Rate Reduction for Image Coding, IEEE Journal on Selected Areas in communications, SAC-5, (Aug., 1987).
R. A. F. Belfor, et al., Motion Compensated Subsampling of HDTV, SPIE, Visual Communications and Image Processing '91, 1605.
Chan and Pratt, Scene Adaptive Coder, IEEE transactions on Communications, vol., COM-32, No. 3(Mar. 1984).
Jae S. Lim, Two-Dimensional Signal and Image Processing, Prentice-Hall, International Edition, pp. 497-500(1990).
Kim Jong-Hun
Kim Seong-Dae
Chin Tommy P.
Daewoo Electronics Co. Ltd.
Le Vu
Pinsak William F.
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