公开(公告)号：US20200244971A1

公开(公告)日：2020-07-30

申请号：US16256302

申请日：2019-01-24

Applicant: GOOGLE LLC

Inventor： Yunqing Wang

IPC: H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/523 ,  H04N19/52

Abstract: A method for encoding a block of a video using inter prediction includes selecting, during motion estimation for the block, a first sub-pixel interpolation filter for sub-pixel interpolation of fractional motion; selecting, during motion compensation, a second sub-pixel interpolation filter based on the first sub-pixel interpolation filter; and encoding, in a compressed bitstream, the second sub-pixel interpolation filter. The first sub-pixel interpolation filter is a 2-tap filter. The first sub-pixel interpolation filter includes weight tuples. Each weight tuple includes two weights and used for sub-pixel interpolation at a sub-pixel location between a first pixel and a second pixel. For at least one weight tuple of the weight tuples, the two weights are not based on a first distance between the sub-pixel location and the first pixel and a second distance between the sub-pixel location and the second pixel.

公开(公告)号：US10542258B2

公开(公告)日：2020-01-21

申请号：US15005545

申请日：2016-01-25

Applicant: GOOGLE LLC

Inventor： Yunqing Wang

IPC: H04N19/129 ,  H04N19/119 ,  H04N19/167 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46

Abstract: Tile copying may include decoding a current frame from an encoded video bitstream by decoding, from the encoded video bitstream, tile information for a current tile of the current frame. Decoding the tile information for the current tile of the current frame includes decoding a reference tile offset, and the tile information for the current tile omits encoded tile content information corresponding to the current tile. From the encoded video bitstream, encoded tile content information corresponding to the reference tile is identified based on the reference tile offset, a decoded tile corresponding to the current tile is generated by decoding the encoded tile content information corresponding to the reference tile as the current tile, and the decoded tile is output or stored.