Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2003-09-25
2009-02-17
Philippe, Gims S (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C382S268000
Reexamination Certificate
active
07492823
ABSTRACT:
A signal adaptive filtering method for reducing blocking effect and ringing noise, a signal adaptive filter, and a computer readable medium. The signal adaptive filtering method capable of reducing blocking effect and ringing noise of image data when a frame is composed of blocks of a predetermined size includes the steps of: (a) generating blocking information for reducing the blocking effect and ringing information for reducing the ringing noise, from coefficients of predetermined pixels of the upper and left boundary regions of the data block when a frame obtained by deconstructing a bitstream image data for inverse quantization is an intraframe; and (b) adaptively filtering the image data passed through inverse quantization and inverse discrete cosine transform according to the generated blocking information and ringing information. Therefore, the blocking effect and ringing noise can be eliminated from the image restored from the block-based image, thereby enhancing the image restored from compression.
REFERENCES:
patent: 5367629 (1994-11-01), Chu et al.
patent: 5475434 (1995-12-01), Kim
patent: 5495538 (1996-02-01), Fan
patent: 5610729 (1997-03-01), Nakajima
patent: 5694489 (1997-12-01), Kishi
patent: 5737451 (1998-04-01), Gandhi et al.
patent: 5920356 (1999-07-01), Gupta et al.
patent: 5946421 (1999-08-01), Kim
patent: 5974197 (1999-10-01), Lee et al.
patent: 6175593 (2001-01-01), Kim et al.
patent: 6259823 (2001-07-01), Lee et al.
patent: 6600839 (2003-07-01), Mancuso et al.
patent: 1138401 (1996-12-01), None
patent: 1151662 (1997-06-01), None
patent: 0 781 053 (1997-05-01), None
patent: 0 781 053 (1997-06-01), None
patent: 3-267888 (1991-11-01), None
patent: 5-316361 (1993-11-01), None
patent: 6-343169 (1994-12-01), None
patent: 7-212759 (1995-08-01), None
patent: 8-149470 (1996-06-01), None
patent: 8-251591 (1996-09-01), None
patent: 8-307870 (1996-11-01), None
patent: WO 99/22509 (1999-05-01), None
Hu J et al,: “Removal of Blocking and Ringing Artifacts in Transform Coded Images” Acoustics, Speech, and Signal Processing, 1997. Icassp-97., 1997 IEEE International Conference On Munich, Germany Apr. 21-24, 1997, Los Alamitos, Ca, USA, IEEE Comput. Soc, US (Apr. 21, 1997), 2565-2568.
Communication regarding European Search Report for Appln. No. EP 03005607, EPO, Nov. 11, 2003.
Communication pursuant to Article 96 (2) EPC, EPO, Nov. 11, 2003.
Chinese Office Action 200410005359.4 dated Dec. 16, 2005.
Lynch, William E. et al., Post Processing Transform Coded Images Using Edges, Int'l Conf. on Acoustics, Speech, and Signal Processing, 1995, vol. 4, pp. 2323-2326.
Webb, “Postprocessing to Reduce Blocking Artifacts for Low Bit-Rate Video Coding Using Chrominance Information,”Proceedings of the International Conference on Image Processing, (Sep. 16-19, 1996), vol. 1, pp. 9-12.
Hu et al., “Removal of Blocking and Ringing Artifacts in Transform Coded Images,”Acoustics, Speech and Signal Processing, 1997, IEEE International Conference Apr. 21, 1997, pp. 2565-2568.
Lee Yung-lyul
Park Hyun-wook
Philippe Gims S
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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