一种用于IMDCT的对称共用递归结构

Symmetry-common recursive architecture implementation on IMDCT

提出了一种面向数字音频解码的用于IMDCT的对称共用递归结构。该结构充分挖掘了反向改进离散余弦变换的对称性和递归性,符合硬件系统结构的模块化和规则性,可以实现奇偶数据在运算上的分时操作,并考虑了IMDCT的对称性,大大减少了所需的计算量,从而降低了硬件结构的复杂度。

A symmetry-common recursive architecture of IMDCT is proposed based on digital audio decoder in this paper.The architecture uses the parallel and recursive property of IMDCT sufficiently.h accords with modularization and regularity of the hardware system architecture and can realize the time-sharing calculation on odd or even data.The symmetry of IMDCT is considered concurrently,so that the calculation load is reduced greatly and the complexity of hardware is reduced as well.