Image analysis – Image compression or coding – Interframe coding
Patent
1995-09-05
1998-09-29
Mancuso, Joseph
Image analysis
Image compression or coding
Interframe coding
348416, 348699, G06K 936, G06K 946
Patent
active
058156020
ABSTRACT:
The objective of this invention is to provide a data processor which can perform motion estimation of moving images at high speed and high accuracy. The data processor according to this invention is equipped with Hadamard transformer (110), first stage processor (120), second stage processor (130), and motion compensation circuit (140). The Hadamard transformer (110) receives image data (12) of the current frame and image data (34) of the reference frame, and Hadamard transforms this image data. First stage processor (120) block matches the target block with the Hadamard coefficient of the reference frame using multiple low-frequency coefficients selected from the Hadamard transformed data. Second stage processor (130) refers to the block matching position obtained in first stage processor (120), determines the search range in the picture data of the reference frame, and obtains the motion vector of the target block in said search range. Motion compensation circuit (140) outputs picture data which was motion compensated on the basis of the motion vector.
REFERENCES:
patent: 5134477 (1992-07-01), Knauer et al.
patent: 5475430 (1995-12-01), Hamada et al.
patent: 5488419 (1996-01-01), Hui et al.
patent: 5488482 (1996-01-01), Ueda et al.
patent: 5581302 (1996-12-01), Ran et al.
Ueda Hideaki
Yamaguchi Hirohisa
Donaldson Richard L.
Johnson Timothy M.
Kempler William B.
Laws Gerald E.
Mancuso Joseph
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