基于PBBShift的ROI编码方法  

ROI coding method based on PBBShift

作　　者：陈鑫[1,2] 陈晓[1,2] 沈千里[1,2] 蔡婷婷[1,2] 

机构地区：[1]南京信息工程大学大气环境与装备技术协同创新中心,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《电子技术应用》2015年第4期159-162,共4页Application of Electronic Technique

摘　　要：为使观察者提早了解图像的大致情况,提出了基于部分背景位平面位移(PBBShift)的感兴趣区域(ROI)编码方法。该方法将背景(BG)位平面分为两部分,编码时下移剩余的BG位平面,解码时可优先传输ROI系数和重要的BG系数,然后传输剩余的BG系数。实验证明,该方法在低码率下,ROI和BG质量相差无几;在高码率下,ROI获得比BG更好的质量。改进的方法在带宽受限的网络中有很大的实用价值。In order to make observer know a general idea of image in advance, this paper puts forward Region of Interest （ROI） coding method based on Partial Background Bitplanes Shift（PBBShift）. This method divides background（BG） bitplanes into two parts, remaining BG bitplanes are shifted down during coding, ROI coefficients and significant BG coefficients will be transmitted firstly during decoding, then remaining BG coefficients can be transmitted. Experiments show that ROI and BG have the same quality under low bit rate, ROI gets a better quality than BG under high bit rate. This improved method has a great practical value in limited bandwidth of the network.

关 键 词：PBBShift ROI编码 BG位平面 

分 类 号：TN919.81[电子电信—通信与信息系统]