US 11,895,293 B2
Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
Toshiyasu Sugio, Osaka (JP); Takahiro Nishi, Nara (JP); Youji Shibahara, Osaka (JP); and Hisao Sasai, Osaka (JP)
Assigned to SUN PATENT TRUST, New York, NY (US)
Filed by Sun Patent Trust, New York, NY (US)
Filed on Oct. 1, 2021, as Appl. No. 17/491,974.
Application 17/491,974 is a continuation of application No. 17/011,452, filed on Sep. 3, 2020, granted, now 11,166,018.
Application 17/011,452 is a continuation of application No. 16/377,874, filed on Apr. 8, 2019, granted, now 10,798,381, issued on Oct. 6, 2020.
Application 16/377,874 is a continuation of application No. 15/897,815, filed on Feb. 15, 2018, granted, now 10,298,926, issued on May 21, 2019.
Application 15/897,815 is a continuation of application No. 15/445,295, filed on Feb. 28, 2017, granted, now 9,930,334, issued on Mar. 27, 2018.
Application 15/445,295 is a continuation of application No. 15/170,223, filed on Jun. 1, 2016, granted, now 9,621,915, issued on Apr. 11, 2017.
Application 15/170,223 is a continuation of application No. 14/447,970, filed on Jul. 31, 2014, granted, now 9,392,298, issued on Jul. 12, 2016.
Application 14/447,970 is a continuation of application No. 13/816,370, granted, now 8,848,805, issued on Sep. 30, 2014, previously published as PCT/JP2011/005323, filed on Sep. 21, 2011.
Claims priority of provisional application 61/386,161, filed on Sep. 24, 2010.
Prior Publication US 2022/0021875 A1, Jan. 20, 2022
Int. Cl. H04N 19/115 (2014.01); H04N 19/51 (2014.01); H04N 19/52 (2014.01); H04N 19/103 (2014.01); H04N 19/172 (2014.01); H04N 19/146 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/115 (2014.11) [H04N 19/103 (2014.11); H04N 19/146 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/51 (2014.11); H04N 19/52 (2014.11)] 2 Claims
OG exemplary drawing
 
1. An image decoding method comprising:
decoding a first flag from a coded signal, the first flag indicating whether or not a motion vector can be used for decoding a current frame including a current block;
decoding a second flag when the current block is coded in skip mode and the first flag indicates that a motion vector can be used, the second flag indicating whether or not a motion vector is used for decoding the current block;
decoding, from the coded signal, index information indicating a motion vector to be selected, when both (a) the first flag indicates that a motion vector can be used and (b) the second flag indicates that a motion vector is used for the decoding of the current block in the skip mode; and
decoding the current block using the motion vector selected based on the index information,
wherein the second flag indicating that the motion vector is not used for decoding the current block is decoded when the first flag does not indicate that the motion vector can be used for decoding the current frame.