公开(公告)号：US10187655B2

公开(公告)日：2019-01-22

申请号：US14871827

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Jim C. Chou ,  Mark P. Rygh ,  Guy Cõté

IPC: H04N19/53 ,  H04N19/52 ,  H04N19/109 ,  H04N19/567 ,  H04N19/147 ,  H04N19/56 ,  H04N19/179 ,  H04N19/186 ,  H04N19/70 ,  H04N19/117 ,  H04N19/13 ,  H04N19/132 ,  H04N19/40 ,  H04N19/139 ,  H04N19/159 ,  H04N19/593

Abstract: System and method for improving operational efficiency of a video encoding pipeline used to encode image data. In embodiments, the video encoding pipeline includes a low resolution pipeline that includes a low resolution motion estimation block, which generates downscaled image data by reducing resolution of the image data and determines a low resolution inter-frame prediction mode by performing a motion estimation search using the downscaled image data and previously downscaled image data. The video encoding pipeline also includes a main pipeline in parallel with the low resolution pipeline that includes a motion estimation block, which determines a candidate inter-frame prediction mode based at least in part on the low resolution inter-frame prediction mode, and a mode decision block, which determines a first rate-distortion cost associated with the candidate inter-frame prediction mode and determines prediction mode used to prediction encode the image data based at least in part on the first rate-distortion cost.