	US 12,395,665 B2
	Encoder and bitstream for efficient coding of global motion vectors
Borivoje Furht, Boca Raton, FL (US); Hari Kalva, Boca Raton, FL (US); and Velibor Adzic, Canton, GA (US)
Filed by OP Solutions, LLC, Amherst, MA (US)
Filed on Oct. 12, 2023, as Appl. No. 18/379,313.
Application 18/379,313 is a continuation of application No. 17/874,918, filed on Jul. 27, 2022, granted, now 11,800,137.
Application 17/874,918 is a continuation of application No. 17/006,613, filed on Aug. 28, 2020, granted, now 11,438,620, issued on Sep. 6, 2022.
Application 17/006,613 is a continuation of application No. PCT/US2020/029936, filed on Apr. 24, 2020.
Claims priority of provisional application 62/838,521, filed on Apr. 25, 2019.
Prior Publication US 2024/0048750 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/51 (2014.01); H04N 19/124 (2014.01); H04N 19/172 (2014.01); H04N 19/593 (2014.01); H04N 19/80 (2014.01)

CPC H04N 19/51 (2014.11) [H04N 19/124 (2014.11); H04N 19/172 (2014.11); H04N 19/593 (2014.11); H04N 19/80 (2014.11)]

6 Claims

1. A video encoder configured to encode a bit stream to be decoded by a decoder, the decoder configured to: receive a bit stream, the bitstream including coded picture data for a sequence of coded pictures and motion vector difference information for two control point motion vectors for 4-parameter affine motion compensation; combine the motion vector difference information from the bitstream with a prediction of two control point motion vectors to form two current control point motion vectors, said prediction of two control point motion vectors being obtained from motion vectors utilized to decode a temporally prior picture in the sequence to the current picture; and utilize the two current control point motion vectors and 4-parameter affine motion compensation to decode coded picture data of the current picture in the sequence of coded pictures.