Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-11-01
2005-11-01
Kelley, Chris (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240250, C375S240260, C375S240280
Reexamination Certificate
active
06961379
ABSTRACT:
With the new plasma display panel technology new kinds of artifacts can occur in video pictures. These artifacts are commonly described as dynamic false contour effect, since they correspond to disturbances of grey levels and colors in the form of an apparition of colored edges in the picture when the observation point on the PDP screen moves. According to the invention such an artifact is compensated by analyzing the motion in the pictures assigning to each block of a picture a corresponding motion vector and performing a re-coding step in which a sub-field code word entry of a current pixel are calculated. For this purpose the motion vector is defined to point from a pixel in a previous picture to a pixel in the current picture. The sub-field code word entries for a current pixel (P8) are determined by dragging sub-field entries of the pixels lying on the motion vector trajectory. In this way for each pixel there is an exact calculation of the sub-field code word of a pixel also for complex moving trajectories like zoom and rotation.
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Karla S. et al. “Bidirectional Motion Estimation via Vector Propagation” IEEE Transactions on Circuits and Systems for Video Technology, US IEEE Inc. New York, vol. 8, No. 8, pp. 976-987.
Copy of European Search Report.
Correa Carlos
Weitbruch Sébastien
Zwing Rainer
Cathey, II Patrick
Fried Harvey D.
Henig Sammy S.
Kelley Chris
Thomson Licensing S.A.
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