Method of coding artifacts reduction

Details Method of coding artifacts reduction Method of coding artifacts reduction

2008-04-01

2008-04-01

Mehta, Bhavesh M (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C382S233000, C382S235000, C382S252000, C358S003260, C358S003270, C358S463000

Reexamination Certificate

active

07352916

ABSTRACT:
A method to reduce coding artifacts within a discrete decoded picture includes a spatial and/or temporal filtering with respective filter characteristics dependent on an image quality value (Q). Preferably, the spatial filtering includes a deblocking filtering, wherein the deblocking filter operation decreases with an increasing image quality value (Q) and/or the deblocking filtering chooses an image quality value (Q) dependent weighting function for a pixel to be filtered according to an activity of both blocks to which common border said pixel belongs.

REFERENCES:
patent: 35414 (1862-05-01), Muralami et al.
patent: 5228098 (1993-07-01), Crinon et al.
patent: 5367629 (1994-11-01), Chu et al.
patent: 5442407 (1995-08-01), Iu
patent: 5502489 (1996-03-01), Kim et al.
patent: 5764307 (1998-06-01), Ozcelik et al.
patent: 5832134 (1998-11-01), Avinash et al.
patent: 5920356 (1999-07-01), Gupta et al.
patent: 6005626 (1999-12-01), Ding
patent: 6178205 (2001-01-01), Cheung et al.
patent: 6281842 (2001-08-01), Moren
patent: 6281942 (2001-08-01), Wang
patent: 6310982 (2001-10-01), Allred et al.
patent: 6335990 (2002-01-01), Chen et al.
patent: 6400989 (2002-06-01), Eckmiller
patent: 6466625 (2002-10-01), Kobayashi et al.
patent: 6668097 (2003-12-01), Hu et al.
patent: 6788823 (2004-09-01), Allred et al.
patent: 6919892 (2005-07-01), Cheiky et al.
patent: 6965724 (2005-11-01), Boccon-Gibod et al.
patent: 7027661 (2006-04-01), Estevez et al.
patent: 0 878 776 (1998-11-01), None
patent: 2 758 198 (1998-07-01), None
patent: 2 322 252 (1998-08-01), None
Park H W, et al.: “A Postprocessing Method for Reducing Quantization Effects in Low Bit-Rate Moving Picture Coding” IEEE Transactions on Circuits and Systems for Video Technology, US, IEEE Inc. New York, vol. 9, No. 1, Feb. 1999, pp. 161-171, XP000802295.
Teo P C, et al.: “Perceptual Image Distortion” Proceedings of the International Conference on Image Processing, US, Los Alamitos, IEEE Comp. Soc. Press, vol. CONF. 1, Nov. 13, 1994, pp. 982-986, XP000522762.

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