Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-08-16
2005-08-16
An, Shawn S. (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240120, C375S240260, C375S240250, C375S240140, C382S233000, C382S236000, C382S238000, C382S232000, C348S699000
Reexamination Certificate
active
06931065
ABSTRACT:
Provided are apparatus and method for precise motion detection in a digital video recording (DVR) system using a Moving Picture Expert Group (MPEG) video compression technique and a computer-readable recording medium for recording a program that implements the method. The motion detection apparatus performs motion detection by using a motion vector generated in the MPEG video compression process. The motion detection apparatus includes: a motion estimation unit for receiving a reference image frame and a current image frame, and estimating a motion vector (MV=(mx,my)) for a motion of an object; a motion compensation unit for calculating a motion compensated prediction error EMV(i) based on the estimated motion vector (MV=(mx,my)); a frame difference calculation unit for calculating a frame difference between the reference image frame and the current image frame; a motion block accumulation unit for accumulating the number (Bmotion) of motion blocks in the current image frame based on the motion compensated prediction error EMV(i) and the frame difference E0(i); and a motion frame determination unit for determining whether the current image frame has a motion, based on the accumulated number Bmotionof motion blocks.
REFERENCES:
patent: 5438374 (1995-08-01), Yan
patent: 5627601 (1997-05-01), Ran et al.
patent: 6084908 (2000-07-01), Chiang et al.
An Shawn S.
Penta Micro Inc.
Sartori Michael A.
Venable LLP
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