US 11,863,740 B2
Bi-prediction coding method and apparatus, bi-prediction decoding method and apparatus, and recording medium
Byeung Woo Jeon, Seongnam-si (KR); Bong Soo Jung, Seoul (KR); and Kwang Hyun Won, Bucheon-si (KR)
Assigned to SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION, Suwon-si (KR)
Filed by SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION, Suwon-si (KR)
Filed on Jun. 27, 2022, as Appl. No. 17/850,567.
Application 17/850,567 is a continuation of application No. 16/202,882, filed on Nov. 28, 2018, granted, now 11,438,575.
Application 16/202,882 is a continuation of application No. 13/779,960, filed on Feb. 28, 2013, granted, now 10,178,383, issued on Jan. 8, 2019.
Application 13/779,960 is a continuation of application No. 12/681,925, granted, now 8,526,499, issued on Sep. 3, 2013, previously published as PCT/KR2008/000966, filed on Feb. 19, 2008.
Claims priority of application No. 10-2007-0059174 (KR), filed on Jun. 15, 2007; and application No. 10-2008-0014672 (KR), filed on Feb. 19, 2008.
Prior Publication US 2022/0337816 A1, Oct. 20, 2022
Int. Cl. H04N 19/105 (2014.01); H04N 19/50 (2014.01); H04N 19/176 (2014.01); H04N 19/15 (2014.01); H04N 19/577 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/15 (2014.11); H04N 19/176 (2014.11); H04N 19/50 (2014.11); H04N 19/577 (2014.11)] 6 Claims
OG exemplary drawing
 
1. An image decoding method with a decoding apparatus, the image decoding method comprising:
(a) receiving an encoded bit stream of a current picture to be decoded;
(b) recovering a selected motion vector from the current picture to a first decoding reference picture by entropy decoding the encoded bit stream of the current picture, the first decoding reference picture being different from the current picture;
(c) calculating a calculated motion vector from the current picture to a second decoding reference picture by scaling the selected motion vector based on a first temporal distance between the current picture and the first decoding reference picture and a second temporal distance between the current picture and the second decoding reference picture, the calculated motion vector being used for inter prediction of a current block belonging to the current picture, the second decoding reference picture being different from the first decoding reference picture;
(d) generating a prediction block relating to the current block in the current picture, based on the calculated motion vector;
(e) generating a residual block relating to the current block through a residual data decoding process based on the entropy decoded bit stream; and
(f) recovering the current block based on the prediction block and the residual block,
wherein the calculating the calculated motion vector is performed based on whether a prediction direction for the selected motion vector is identical to or different from a prediction direction for the calculated motion vector, and
wherein the residual block is generated by performing inverse-quantization for entropy decoded transform coefficients.