Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2007-02-06
2007-02-06
An, Shawn S. (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240120, C375S240130, C375S240240, C375S240250, C382S238000, C382S236000, C382S233000, C382S268000, C382S275000
Reexamination Certificate
active
10299840
ABSTRACT:
A system and method is provided to avoid or otherwise reduce luminance and/or chrominance trailing artifacts in block-based hybrid video coders using multiple block sizes and shapes. The proposed trailing artifact avoidance approach has at its core three main components. The first component is a method to identify flat blocks in the source frame that are most susceptible to the appearance of trailing artifacts, and where flatness is determined according to several proposed criteria. The second component is a method to identify bad blocks, which refer to predicted blocks in motion estimation that correspond to flat blocks in the source frame and that contain trailing artifacts. The third component is a method to avoid trailing artifacts when they are detected within a bad block, and where the avoidance is achieved by employing one or more tools from among a proposed set of high fidelity coding tools and/or high performance motion estimation tools.
REFERENCES:
patent: 6363117 (2002-03-01), Kok
patent: 6845180 (2005-01-01), Matthews
patent: 6973221 (2005-12-01), Xue
patent: 6993191 (2006-01-01), Petrescu
Gunturk, B.K.; Altunbasak, Y.; Mersereau, R.M., “Multiframe Blocking-Artifact Reduction for Transform-Coded Video”, IEEE Transactions on Circuits and Systems for Video Technology (USA), Apr. 2002, pp. 276-282, vol. 12, No. 4, IEEE, United States.
Lee, Kyeong-Hwan; Hwang, Hee-Chul; Choi, Jung-Hyun; Lee, Bub-Ki; Kim, Duk-Gyoo, “Blocking Artifact Reduction Techniques for MPEG CODEC”, Proceedings of the International Conference on Imaging Science, Systems, and Technology. CISST'2000, Jun. 26-Jun. 29, 2000, pp. 521-527, vol. 2, CSREA Press —Univ. Georgia, Athens, United States.
Jung, Shi Chang; Paik, Joon Ki, “Modified Regularized Image Restoration for Postprocessing Inter-Frame Coded Images”, Proceedings 1999 International Conference on Image Processing, Oct. 24-Oct. 28, 1999, pp. 474-478, vol. 3, IEEE, Piscataway, United States.
Chou, Jim; Crouse, M.; Ramchandran, K., “A Simple Algorithm for Removing Blocking Artifacts in Block-Transform Coded Images”, IEEE Signal Processing Letters, Feb. 1998, pp. 33-35, vol. 5, No. 2, IEEE, United States.
Shen, Mei-Yin; Kim, Jog Won; Kuo, Jay C.C., “Fast Compression Artifact Reduction Technique Based on Nonlinear Filtering”, ISCAS'99 Proceedings for the 1999 IEEE International Symposium on Circuits and Systems VLSI, May 30-Jun. 2, 1999, pp. 179 182, vol. 4, IEEE, Piscataway, United States.
Hu, J.; Sinaceur, N.; Li, F.; Fan, Z., “A Simplified Approach to Reduce Compression Artifacts in Transform Coded-Images”, Proceedings of the IASTED International Conference: Signal and Image Processing, Nov. 11-Nov. 14, 1996, pp. 110-114, IASTED, Anaheim, United States.
Meier, T.; Ngan, K.N.; Crebbin, G., “Reduction of Coding Artifacts at Low Bit Rates”, Proceedings of the SPIE—The International Society for Optical Engineering, Jan. 28-Jan. 30, 1998, pp. 241-251, vol. 3309, SPIE-Int. Soc. Opt. Eng, United States.
Amara Foued Ben
Au James
Jerbi Ali
Kossentini Faouzi
An Shawn S.
Hunter Christopher N.
McCarthy Tétrault LLP
UB Video Inc.
LandOfFree
Trailing artifact avoidance system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Trailing artifact avoidance system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trailing artifact avoidance system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3894586