Title:
IMAGE CODER AND IMAGE CODING METHOD
Document Type and Number:
Japanese Patent JP3520858
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for simplifying arithmetic operations in the processing of global motion compensation where a motion vector field of the entire image is approximated by a few parameters.
SOLUTION: Interpolating/extrapolating motion vectors at representative points 602, 603 and 604 having features in a spatial interval obtains motion vectors in global motion compensation. Since divisions used to composite predicted images in the global motion compensation can be substituted by shift arithmetic operations, the processing by a computer or an exclusive hardware unit can be simplified.
Inventors:
Nakaya, Yuichiro
Application Number:
JP2001104090A
Publication Date:
April 19, 2004
Filing Date:
March 18, 1996
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04N19/50; H03M7/36; H04N19/503; H04N19/51; H04N19/513; H04N19/54; H04N19/59; H04N19/61; H04N19/625; (IPC1-7): H04N7/32
Attorney, Agent or Firm:
作田 康夫
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