【摘 要】
：
MQ(Multiple Quantization)编码器由于效率低下已经成为JPEG2000的性能瓶颈.本文对MQ编码算法中的上下文关系进行了提取,对索引表中的启动态和非暂态进行了分离,并提出一种用
【机 构】
：
西安电子科技大学宽带隙半导体技术国家重点学科实验室,西安电子科技大学ISN重点实验室
论文部分内容阅读
MQ(Multiple Quantization)编码器由于效率低下已经成为JPEG2000的性能瓶颈.本文对MQ编码算法中的上下文关系进行了提取,对索引表中的启动态和非暂态进行了分离,并提出一种用于预测索引值的方法.同时,对重归一化运算中出现的大概率事件和小概率事件进行分离,使其可并行对2个上下文完成编码.依据该算法,本文提出了一种多上下文并行处理的MQ编码器VLSI结构.实验结果表明,本文提出的MQ编码器能够工作在286.80MHz,吞吐量为573.60 Msymbols/sec,相比Dyer提出的Brute Force with Modified Byteout结构,本文的吞吐量提升约35％,且面积减小78％.
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