JPEG2000中EBCOT算法的VLSI结构研究与实现

提出了一种快速、高效专用于JPEG2000中EBCOT算法的VLSI结构．根据用于提高EBCOT算法处理速度的多种加速技术，提出了一种“探测——编码”方法，即先找出下一个待编码比特的位置，然后再对其进行编码．这样三次编码过程的扫描量实质上只相当于一次全扫描，编码效率提高了三倍．根据馥方法本文中的结构建立两级流水线操作方式，将编码过程分为：“探测”和“编码”两个处理过程．从而处理速度得到极大的提高．最后．对本文的结构进行了VLSI实现和验证．并在结构的面积，速度和功耗等方面和同类结构进行了比较，可以看出本文中的结构具有高的处理速度和较低的功耗．

Analysis and Architecture Design of EBCOT in JPEG2000

A fast and efficient VLSI architecture of EBCOT algorithm in JPEG2000 is proposed. Based on the character of EBCOT and the accelerate algorithm, a strobe-coding approach is introduced. In this approach, a wanted bit is finding firstly, then, a coding operation is performed. So, three coding passes, the coding efficient is improved. According to this approach, a pipelining architecture is employed. It consists of two stages (Strobe and Coding). As a result, the processing speed has greatly been improved. Finally, the architecture is implemented in TMSC 0.18um technology. Additionally, a comparison is carried out between our architecture and related architecture.