Adaptive de-blocking filtering apparatus and method for MPEG...

Details Adaptive de-blocking filtering apparatus and method for MPEG... Adaptive de-blocking filtering apparatus and method for MPEG...

2004-04-29

2009-02-24

Vo, Tung (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

07496141

ABSTRACT:
A post processing de-blocking filter includes a threshold determination unit for adaptively determining a plurality of threshold values according to at least differences in quantization parameters QPs of a plurality of adjacent blocks in a received video stream and to a user defined offset (UDO) allowing the threshold levels to be adjusted according to the UDO value; an interpolation unit for performing an interpolation operation to estimate pixel values in an interlaced field if the video stream comprises interlaced video; and a de-blocking filtering unit for determining a filtering range specifying a maximum number of pixels to filter around a block boundary between the adjacent blocks, determining a region mode according to local activity around the block boundary, selecting one of a plurality of at least three filters, and filtering a plurality of pixels around the block boundary according to the filtering range, the region mode, and the selected filter.

REFERENCES:
patent: 5590064 (1996-12-01), Astle
patent: 5933541 (1999-08-01), Kutka et al.
patent: 5937101 (1999-08-01), Jeon et al.
patent: 6028967 (2000-02-01), Kim et al.
patent: 6041145 (2000-03-01), Hayashi et al.
patent: 6115503 (2000-09-01), Kaup
patent: 6188799 (2001-02-01), Tan et al.
patent: 6236764 (2001-05-01), Zhou
patent: 6240135 (2001-05-01), Kim
patent: 6298161 (2001-10-01), Koo et al.
patent: 6317522 (2001-11-01), Rackett
patent: 6320905 (2001-11-01), Konstantinides
patent: 6360024 (2002-03-01), Tan et al.
patent: 6370279 (2002-04-01), Paik
patent: 6539060 (2003-03-01), Lee et al.
patent: 6563958 (2003-05-01), Andrew
patent: 6600839 (2003-07-01), Mancuso et al.
patent: 6618510 (2003-09-01), Umiji
patent: 6704759 (2004-03-01), Timko et al.
patent: 6748113 (2004-06-01), Kondo
patent: 6823089 (2004-11-01), Yu et al.
patent: 6950473 (2005-09-01), Kim et al.
patent: 6983079 (2006-01-01), Kim
patent: 7027654 (2006-04-01), Ameres et al.
patent: 7031392 (2006-04-01), Kim
patent: 7031393 (2006-04-01), Kondo et al.
patent: 7227901 (2007-06-01), Joch et al.
patent: 7262886 (2007-08-01), Kim
patent: 2002/0051496 (2002-05-01), Hashimoto
patent: 2002/0118399 (2002-08-01), Estevez et al.
patent: 2002/0196856 (2002-12-01), Miro Sorolla et al.
patent: 2003/0035586 (2003-02-01), Chou
patent: 2003/0044080 (2003-03-01), Frishman et al.
patent: 2003/0053708 (2003-03-01), Kryukov et al.
patent: 2003/0053711 (2003-03-01), Kim
patent: 2003/0058944 (2003-03-01), MacInnis et al.
patent: 2003/0152146 (2003-08-01), Lin et al.
patent: 2003/0202608 (2003-10-01), MacInnis et al.
patent: 2003/0219073 (2003-11-01), Lee et al.
patent: 2003/0219074 (2003-11-01), Park et al.
patent: 2005/0013497 (2005-01-01), Hsu et al.
patent: 2005/0207492 (2005-09-01), Pao
patent: WO 03/094521 (2003-11-01), None
R.Rosenholtz, A. Zakhor; Iterative procedures for reduction of blocking effects in transform image coding; IEEE Trans. Circuits Syst. Video Technol; Mar. 1992; p. 91-p. 95;vol. 2.
Y. Yang, N. P. Galatsanos, A.K.Katsaggelos; Regularized reconstruction to reduce blocking artifact of block discrete cosine transform compressed image; IEEE Trans. Circuits Syst. Video Technol.;Dec. 1993; p. 421-p. 432; vol. 3.
Y. Yang, N. P. Galatsanos, A.K.Katsaggelos; Projection-based spatially adaptive reconstruction of block-transform compressed images; IEEE Trans. Image Processing; Jul. 1995; p. 896-p. 908; vol. 4.
T.Meier, K.N.Ngan, G. Grebbin; Reduction of blocking artifacts in image and video coding; IEEE Trans. Circuits Syst. Video Technol; Apr. 1999; p. 490-p. 500; vol. 9.
T.P. O'Rourke, R.L. Stevenson; Improved image decompression for reduced transform coding artifacts; IEEE Trans. Circuits Syst. Video Technol.; Dec. 1995; p. 490-p. 499; vol. 5.
Y.L. Lee, H.C. Kim, H.W.Park; Blocking effect reduction of JPEG images by signal adaptive filtering; IEEE Trans. Image Processing; Feb. 1998; p. 229-p. 234; vol. 7.
H.W. Park, Y.L.Lee; A postprocessing method for reducing quantization effect in low bit-rate moving picture coding; IEEE Trans. Circuits Syst. Vldeo Technol; Feb. 1999; p. 161-p. 171; vol. 9.
S.D.Kim, J. Yi, H.M.Kim, J.B.Ra; A deblocking filter with two separate modes in block-based video coding; IEEE Trans. Circuits Syst. Vldeo Technol; Feb. 1999; p. 156-p. 160; vol. 9.
P.List, A.Joch, J.Lainema, G.Bjontegaard, M.Karczewicz; Adaptive deblocking filter; IEEE Trans. Circuits Syst. Vldeo Technol; Jul. 2003; p. 614-p. 619; vol. 13.

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