单一滑动窗口下的字级位平面编码研究与实现  

Study and implementation of word-level bit-plane coding in single sliding window

作　　者：苏会艳[1] 罗桂娥[1] 

机构地区：[1]中南大学信息科学与工程学院,长沙410083

出　　处：《计算机工程与应用》2010年第26期60-63,共4页Computer Engineering and Applications

摘　　要：位平面编码(BPC)是JPEG2000编码器中EBCOT的重要组成部分。为了解决BPC实现的低效问题,提出了一种改进的并行硬件结构来实现字级位平面编码算法。对编码通道预测和上下文形成的流水线并行处理技术进行了研究,实现了在一个时钟周期内对一个条带列的所有位样本并行编码。当样本系数被顺次编码时,包含在每个位平面中的三个通道编码在一次扫描中完成。该系统结构已经通过ModelSim实现和TSMC综合。结果表明,该结构可以有效减少硬件成本,并提供高速的数据处理能力,适合实时图像和视频的应用。Bit-Plane Coding（BPC） is an important part of EBCOT which belongs to JPEG2000 coder.In order to improve the efficiency of BPC, this paper presents an improved parallel hardware architecture used to realize word-level bit-plane coding,and studies the parallel processing technology of pass prediction and context formation.It can be finished that all bits of one stripe are coded in parallel during one clock cycle.When sample coefficients are coded one after another, there code passes included in each bit-plane are scanned in one time.This architecture is realized by ModelSim and synthesized by TSMC.Experimental result demonstrates that the proposed architecture can provide high-speed data processing and efficient hardware cost reducing.It is fit for real-time image and video application.

关 键 词：JPEG2000 位平面编码 字级顺序 编码通道预测 单窗口 

分 类 号：TN919.81[电子电信—通信与信息系统]