二维离散余弦变换/逆离散余弦变换电路及方法

摘要

为了实现二维离散余弦变换（DCT）/逆离散余弦变换（IDCT）,本文提供一种二维离散余弦变换/逆离散余弦变换电路,采用一个加法器和两个移位器代替一个乘法器,通过选择特定的系数,使得硬件电路无需使用耗费资源较多、速度较慢的乘法器,是一种高效的无乘法器的DCT变换电路。该电路只需要很少的加法器和移位器,并可以达到很高的精度。%In order to realize the two dimension discrete cosine transform/inverse discrete cosine transform, this paper provides a kind of two dimension discrete cosine transform/inverse discrete cosine transform circuit, using an adder and two shifter instead of a multiplier, by choosing a specific coefficient, to make the hardware circuit without the use of cost more resources, speed slower multiplier, is a kind of efficient without multiplier of DCT transformation circuit. This circuit only need a few adder and shifter, and can reach high accuracy.