一种提高图像旋转显示DDR效率的方法  

A Method to Improve DDR Efficeincy on Image Rotation Display

作　　者：吴占敏 胡雪梅 WU Zhanmin;HU Xuemei(Rockchip Electronics Co.,Ltd.,Fuzhou,Fujian 350003,China)

机构地区：[1]瑞芯微电子股份有限公司,福建福州350003

出　　处：《自动化应用》2023年第24期219-221,共3页Automation Application

摘　　要：本文提出了一种Bank Hash的方法,将原来相邻的同一Bank不同页的访问映射成不同Bank的访问,只需等待t_(RRD),时间大致在10 ns以内,远小于t_(RC),可提高访问效率。结果表明,对于一个4K ARGB格式图像,旋转访问效率提升了6倍左右,符合显示帧率要求,同时该方法也不会对非旋转访问造成损失。This paper proposes a Bank Hash method that maps visits from adjacent pages of the same Bank to visits from different Banks.It only requires waiting for t_(RRD),which takes about 10 ns,much less than t_(RC),to improve access efficiency.The results show that for a 4K ARGB format image,the rotation access efficiency is improved by about 6times,which meets the display frame rate requirements.At the same time,this method does not cause any loss to non rotation access.

关 键 词：图像旋转 DDR存储 DDR效率 Bank Hash 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]