应用于JPEG2000的高性能MQ编码器VLSI设计

目前，MQ编码器由于自身严格串行的工作特点，成为限制JPEG2000编码性能提升的一个关键瓶颈．文中提出了一种适用于JPEG2000图像压缩算法的高性能MQ编码器．该MQ编码器通过采用Index值预测等优化方法实现编码时间的缩短以及存储需求的降低．此外，文中还将提出的MQ编码器应用到Tier 1编码当中，并根据位平面编码器的输出特点，提出了一种接口设计来实现位平面编码器与MQ编码器的高效连接， 从而实现单位时钟周期内Tier 1编码吞吐率最高3倍提升．经FPGA验证，文中提出的MQ编码器与目前的结构相比，在吞吐率方面可以取得至少10％的提升，存储需求也明显下降．

VLSI design of an efficient MQ encoder for JPEG2000

The MQ encoder has become the bottleneck of the improvement of the performance of JPEG2000 coding because of its serial processing nature. This paper presents a high efficient MQ encoder for the JPEG2000 image compression system. Index prediction and some other optimization technique have been used to shorten the encoding time and reduce required memory. Besides, in order to apply the efficient MQ encoder into the Tier1 encoder, a new design for realizing the interface between BPC encoder and MQ encoder is also presented based on the output characteristics of BPC and the throughput of the Tier 1 encoder can be raised up to three times. The MQ encoder is synthesized on FPGA, and it can achieve at least 10％ throughput increase compared to the existing structure. The required memory has also been reduced obviously.