Image analysis – Image compression or coding – Interframe coding
Reexamination Certificate
2011-01-04
2011-01-04
Werner, Brian P (Department: 2624)
Image analysis
Image compression or coding
Interframe coding
C375S240240
Reexamination Certificate
active
07865026
ABSTRACT:
A data reuse method with level C+ for block matching motion estimation is disclosed. Compared to conventional Level C scheme, this invention can save large external memory bandwidth of motion estimation. The main idea is to reuse the overlapped searching region in the horizontal direction and partially reuse the overlapped searching region in the vertical direction. Several vertical successive current macroblocks are stitched, and the searching region of these current macroblocks is loaded, simultaneously. With the small overhead of internal memory, the reduction of external memory bandwidth is large. By case studies of H.264/AVC, the level C+ scheme can provide a good trade-off between the conventional Level C and D scheme.
REFERENCES:
Huang et al., Memory Analysis of VLSI Architecture for 5/3 and 1/3 Motion-Compensated Temporal Filtering, Mar. 18-23, 2005, IEEE International Conference on Acoustices, Speech, and Signal Processing, 2005, vol. 5,pp. V-93 thru V-96.
Tuan et al., On the Data REuse and Memory Bandwidth Analysis for Full-Search Block-Matching VLSI Architecture, Jan. 2002, IEEE Transactions on Circuits and Systems for Video Technology, vol. 12, No. 1, pp. 61-72.
Su et al., Motion Estimation Methods for Overlapped Block Motion Compensation, IEEE Transactions on Image Processing, Sep. 2000, vol. 9, No. 9, pp. 1509-1521.
Hang et al., Motion Estimation for Video Coding Standards, 1997, Kluwer Academic Publishers: Journal of VLSI Signal Processing, vol. 17, pp. 113-136.
Chen Ching Yeh
Chen Liang Gee
Chen Yi Hau
Huang Chao Tsung
Bacon & Thomas PLLC
National Taiwan University
Rosario Dennis
Werner Brian P
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