Image analysis – Image compression or coding – Interframe coding
Reexamination Certificate
2005-02-22
2005-02-22
Mehta, Bhavesh M. (Department: 2621)
Image analysis
Image compression or coding
Interframe coding
C375S240160, C375S240200, C375S240220, C375S240240, C382S250000, C382S251000, C382S260000, C382S268000
Reexamination Certificate
active
06859558
ABSTRACT:
The present invention relates to a method for eliminating a blocking effect in a compressed video signal signal. The method of the invention includes: the encoding step of eliminating a blocking effect by compensating the motion of a signal compressed in block unit to be transmitted; the decoding step of restoring the motion compensated video signal to the original video signal by reducing the prediction residual between the motion compensated video signal and the original video signal and the blocking effect; and the post-filtering step of performing post-filtering in a blocking elimination filter in order to eliminate a blocking effect and ring effect remained in the compensated signal. The equation for obtaining the original pixel is made simple by eliminating the remaining blocking effect and ring effect using a loop/post filter. In addition, normalization parameters can be stored in the look-up table and can be detected according to the difference between pixels adjacent to the original pixel and the size of quantizaiton, whereby the equation for restoring the compressed moving video signal, resulting in excessive smoothing, becomes simpler, and filtering control is made possible by a simple equation, thus making a high speed real time video signal processing possible.
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Desire Gregory
Fleshner & Kim LLP
LG Electronics Inc.
Mehta Bhavesh M.
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