摘要
文章提出了一种面向MP3解码的用于IMDCT[1]的基于查找表的优化算法。该算法充分挖掘反向改进离散余弦变换的周期性,符合硬件系统结构的模块化和规则化,可以实现长短块的复用,并考虑了IMDCT的对称性,大大减少了所需的计算量,降低了硬件结构的复杂度。
In this paper, a HP3 decoder-oriented and based-o-looking-up table optimization algorithm of IMDCT is proposed. The algorithm uses periodicity property of IMDCT sufficiently. It accords with modularization and regularity of the hardware system architecture and can realize the multiplexing of the long block and short block. The symmetry of IMDCT is considered concurrently, thus the calculation load and the complexity of hardware are greatly reduced.
出处
《信息安全与通信保密》
2008年第10期57-59,共3页
Information Security and Communications Privacy
