Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Reexamination Certificate
2006-04-25
2006-04-25
Yenke, Brian P. (Department: 2614)
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
C348S624000, C348S718000, C382S260000, C382S261000, C382S265000
Reexamination Certificate
active
07034892
ABSTRACT:
Noise reduction is an important feature in consumer television. This is realized by spatial, temporal or spatio-temporal filters. Spatial filters require pixels from within one image, while temporal filters require samples from two or more successive images. The spatio-temporal filter unit (100) integrates spatial and implicit motion-compensated temporal noise reduction in one filter. For the motion compensation, no motion vectors are required. The spatio-temporal filter unit (100) is provided with a sigma filter (112) having one filter kernel (107) designed to operate on the pixels from both a current image and from the output of the spatio-temporal filter unit, being a temporally recursive filtered image. The operation of the spatio-temporal filter unit (100) can be adjusted by varying the thresholds of the sigma filter (112) and the selection of pixels. The adjustments can be controlled by a motion estimator (222), a motion detector (224) and a noise estimator (220).
REFERENCES:
patent: 5260791 (1993-11-01), Lubin
patent: 5500685 (1996-03-01), Kokaram
patent: 5512956 (1996-04-01), Yan
patent: 5903680 (1999-05-01), De Haan et al.
patent: 6239847 (2001-05-01), Deierling
patent: 6310982 (2001-10-01), Allred et al.
patent: 6529637 (2003-03-01), Cooper
patent: 6573946 (2003-06-01), Gryskiewicz
patent: 6633683 (2003-10-01), Dinh et al.
patent: 6657676 (2003-12-01), Borneo et al.
patent: 6788823 (2004-09-01), Allred et al.
patent: 6819804 (2004-11-01), Tenze et al.
patent: 2002/0118887 (2002-08-01), Gindele
patent: 0601655 (1993-12-01), None
“Memory Integrated Noise Reduction IC for Television”, G. de Haan et al., IEEE Transactions on Consumer Electronics, vol. 42, No. 2, May 1996, pp. 175-181.
Eland Rudolf
Kwaaitaal-Spassova Tatiana Georgieva
Ojo Olukayode Anthony
Goodman Edward W.
Koninklijke Philips Electronics , N.V.
Yenke Brian P.
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