Title:
MOTION VECTOR CODER
Document Type and Number:
Japanese Patent JP3950211
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a motion vector coder in which a coding efficiency of a motion vector is furthermore improved by obtaining an optimum prediction value of the motion vector.
SOLUTION: This coder includes a variance calculation section 20 that calculates a variance of a reference motion vector to generate a 1st or 2nd selection signal, a median filter 25 deciding a 1st prediction value, a minimum deviation selection section 40 that decides a 2nd prediction value SP, a prediction value decision section 50 that calculates the number of coded bits obtained by coding a current motion vector with respect to each of the 1st and 2nd prediction values to decide a 3rd prediction value, a switch 45 that selects the 1st or 2nd prediction value as an optimum prediction value in response to the 1st or 2nd selection signal, and a difference value coding section 55 that codes the current motion vector data with respect to the optimum prediction value to generate coded motion vector data.
Inventors:
Lee
Application Number:
JP30565797A
Publication Date:
July 25, 2007
Filing Date:
November 07, 1997
Export Citation:
Assignee:
Daewoo Electronics Corporation
International Classes:
H04N19/50; H01F38/42; H04N3/19; H04N5/14; H04N19/105; H04N19/11; H04N19/146; H04N19/176; H04N19/189; H04N19/196; H04N19/423; H04N19/46; H04N19/463; H04N19/51; H04N19/52; H04N19/57; H04N19/593; H04N19/70; H04N19/91; (IPC1-7): H04N7/32
Attorney, Agent or Firm:
Kenji Sugimura
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Yoshiyuki Iwasa
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Yoshiyuki Iwasa
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