Television – Bandwidth reduction system – Data rate reduction
Patent
1992-11-25
1995-03-21
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348413, H04N 7137
Patent
active
054000769
ABSTRACT:
In a compressed motion picture signal expander, if the compressed motion picture signal includes an uncorrectable signal error, the resulting defective picture block can be replaced by a replacement picture block that blends in smoothly with the picture blocks surrounding it. Hence the picture error resulting from the uncorrectable signal error is concealed. The defective picture block resulting from a signal portion including an uncorrectable signal error is replaced by a replacement block produced by prediction from a past picture using the motion of the past picture. In this manner, the defective picture block can be replaced by the replacement picture block that blends smoothly with the surrounding picture blocks regardless of the existence of motion in the picture. When an uncorrectable signal error is detected, the expander determines whether or not the motion quantity represented by the motion vector of the picture block of the past picture corresponding to the defective picture block is larger than a predetermined value. If the motion quantity is large, the replacement picture block is generated by intra-picture interpolation, using the pixel values of the boundary pixels in the picture blocks surrounding the defective picture block. If the motion quantity is small, the replacement picture block produced by prediction block is used. In this manner, the error resulting from the uncorrectable signal can be concealed and rendered unnoticeable, regardless of the motion quantity represented by the compressed motion picture signal.
REFERENCES:
patent: 4684984 (1987-08-01), Hirano
patent: 4958226 (1990-09-01), Haskell et al.
patent: 5057921 (1991-10-01), Robert et al.
patent: 5068724 (1991-11-01), Krause et al.
patent: 5089889 (1992-02-01), Sugiyama
patent: 5122876 (1992-06-01), Aoki
patent: 5128756 (1992-07-01), Johnston et al.
patent: 5144427 (1992-09-01), Kitaura et al.
patent: 5150210 (1992-09-01), Hoshi et al.
patent: 5166958 (1992-11-01), Shimokoriyama et al.
patent: 5226093 (1993-07-01), Iwase
patent: 5243428 (1993-09-01), Challapali et al.
Signal Processing: Image Communication, vol. 2, No. 2, Aug. 1990, Amsterdam, NL; pp. 127-144, XP243473, Puri et al.: "Video coding with motion-compensated interpolation for CD-ROM applications".
IEEE Journal On Selected Areas In Communication, vol. 7, No. 5, Jun. 1989, New York, USA, pp. 807-814, XP36749, M. Wada: "Selective recovery of video packet loss using error concealment".
Britton Howard W.
Lee Richard
Sony Corporation
LandOfFree
Compressed motion picture signal expander with error concealment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compressed motion picture signal expander with error concealment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressed motion picture signal expander with error concealment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1152577