Title:
MOTION VECTOR DETECTOR FOR DYNAMIC IMAGE, MOTION COMPENSATION PREDICTOR USING THE SAME AND INTER-MOTION COMPENSATION PREDICTION FRAME ENCODER
Document Type and Number:
Japanese Patent JP3295228
Kind Code:
B2
Abstract:
PURPOSE: To detect a motion vector at a lattice point itself with high accuracy for the low bit encoding of a dynamic image.
CONSTITUTION: It is assumed that transmission transformations vx=a+bx+cy+dx2+exy and vy=f+gx+hy+ey2+dxy are used in compensation prediction. Such equations are accumulated in a motion model accumulation part 24 as the model information 24a of the motion vector, and the motion vector at each lattice point can be found from the constraint condition of the space-time gradient of a picture element value and the transformation equations by calculation in a motion vector calculation part 26 by using a space derivative image 21a and a time derivative image 22a.
Inventors:
Atsushi Koike
Satoshi Katsuno
Yoshinori Hatori
Satoshi Katsuno
Yoshinori Hatori
Application Number:
JP15334194A
Publication Date:
June 24, 2002
Filing Date:
July 05, 1994
Export Citation:
Assignee:
KDDI Co., Ltd.
International Classes:
H04N19/50; G06T9/00; H03M7/36; H04N19/105; H04N19/14; H04N19/167; H04N19/196; H04N19/20; H04N19/21; H04N19/423; H04N19/503; H04N19/51; H04N19/523; H04N19/53; H04N19/54; H04N19/57; H04N19/59; H04N19/61; H04N19/625; H04N19/85; H04N19/94; (IPC1-7): H04N7/32; G06T9/00; H03M7/36
Domestic Patent References:
| JP6334992A | ||||
| JP767111A | ||||
| JP795592A | ||||
| JP799660A |
Attorney, Agent or Firm:
Toshiro Mitsuishi (2 outside)