| US 7,558,321 B2 | ||
| Method of deriving a motion vector of a bi-predictive block based on a list 1 motion vector of a co-located block in a reference picture | ||
| Byeong Moon Jeon, Seoul (Korea, Republic of) | ||
| Assigned to LG Electronics Inc., Seoul (Korea, Republic of) | ||
| Filed on Oct. 09, 2007, as Appl. No. 11/907,073. | ||
| Application 11/907073 is a division of application No. 11/044002, filed on Jan. 28, 2005. | ||
| Application 11/044002 is a division of application No. 10/338283, filed on Jan. 06, 2003, granted, now 7,233,621. | ||
| Claims priority of application No. 10-2002-0060742 (KR), filed on Oct. 04, 2002; application No. 10-2002-0061243 (KR), filed on Oct. 08, 2002; and application No. 10-2002-0071226 (KR), filed on Nov. 15, 2002. | ||
| Prior Publication US 2008/0031341 A1, Feb. 07, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04N 7/12 (2006.01); G06K 9/36 (2006.01) | ||
| U.S. Cl. 375—240.16 [382/238] | 1 Claim |
| 1. A method of deriving motion vectors of a bi-predictive block based on a list 1 motion vector of a co-located block in a reference picture performed by a moving picture coding system, the method comprising:
selecting, by the moving picture coding system, the list 1 motion vector of the co-located block in a first reference picture as the motion vector for deriving the motion vectors of
the bi-predictive block, if the co-located block only has the list 1 motion vector, the first reference picture being a type of reference picture permitted to be located temporally before or
after a current picture including the bi-predictive block;
scaling, by the moving picture coding system, the selected motion vector based on temporal distance between the current picture
and a second reference picture referred by the co-located block; and
deriving, by the moving picture coding system, the motion vectors of the bi-predictive block based on the scaled motion vector.
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