公开(公告)号：US20180090110A1

公开(公告)日：2018-03-29

申请号：US15350117

申请日：2016-11-14

Applicant: Faraday Technology Corp.

Inventor： Cheng-Yen Huang ,  Chun-Yuan Lai

IPC: G09G5/393 ,  H04N5/907

CPC classification number: G09G5/393 ,  H04N5/76 ,  H04N5/907

Abstract: An apparatus and a method for video frame rotation are provided. The apparatus includes a synchronous dynamic random access memory (SDRAM) and a video rotation circuit. The video rotation circuit is coupled to the SDRAM. The video rotation circuit sequentially writes a plurality of pixels of a video frame into the SDRAM in a row-by-row scanning manner. The video rotation circuit divides a plurality of columns of the video frame into a plurality of column sets, so as to divide each of the rows of the video frame into a plurality of sub-rows. The video rotation circuit performs an internal column-set scanning for each of the column sets in a column-set-by-column-set manner, so as to discretely read the sub-rows from the SDRAM.