Title:
改善されたダイレクトモードのブロック予測方法
Document Type and Number:
Japanese Patent JP4435480
Kind Code:
B2
Abstract:
A method of predicting a current block (B c ') of a bi-predictive picture (B 5 ) in direct mode is disclosed, comprising: obtaining a forward motion-compensated block (B f ) pertaining to a forward reference picture (P 1 ; P 4 ) by using a forward motion vector (MV f ), and obtaining a backward motion-compensated block (B b ) pertaining to a backward reference picture (P 7 ) by using a backward motion vector (MV b ) ; and predicting the current block (B c ') of the bi-predictive picture (B 5 ) using a weighted sum of the forward motion-compensated block (B f ) and the backward motion-compensated block (B b ), wherein in predicting the current block (B c ') of the bi-predictive picture (B 5 ), a first weight factor is applied to the forward motion-compensated block (B f ) and a second weight factor is applied to the backward motion-compensated block (B b ), wherein the first and second weight factors are derived using a picture order count (T b ) of the backward reference picture (P 7 ), a picture order count (T c ) of the bi-predictive picture (B 5 ) and a picture order count (T f ) of the forward reference picture (P 1 ; P 4 ), and wherein the forward motion vector (MV f ) and the backward motion vector (MV b ) are calculated from a motion vector (MV) of a co-located block (B S ) in the backward reference picture (P 7 ).
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Inventors:
Jeon, Byon Moon
Application Number:
JP2003004236A
Publication Date:
March 17, 2010
Filing Date:
January 10, 2003
Export Citation:
Assignee:
LG ELECTRONICS INC.
International Classes:
H03M7/36; G06T9/00; H04N19/593
Domestic Patent References:
| JP200145498A | ||||
| JP2285816A | ||||
| JP2192378A | ||||
| JP9163376A | ||||
| JP200488722A |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Tomohiro Minamiyama
Shimichi Akihisa
Yoshio Mizutani
Jun Tsuruta
Tetsuro Shimada
Tomohiro Minamiyama
Shimichi Akihisa
Yoshio Mizutani