公开(公告)号：US07035332B2

公开(公告)日：2006-04-25

申请号：US09924140

申请日：2001-08-07

Applicant: Ouyang He ,  Li Sha ,  Shuhua Xiang ,  Ping Zhu ,  Yaojun Luo

Inventor： Ouyang He ,  Li Sha ,  Shuhua Xiang ,  Ping Zhu ,  Yaojun Luo

IPC: H04B1/66

CPC classification number: G06F17/147 ,  H04N19/423 ,  H04N19/43 ,  H04N19/61

Abstract: A method, apparatus, computer medium, and other embodiments for discrete cosine transform and inverse discrete cosine transform (DCT/IDCT) of image signals are described. A DCT/IDCT module includes a plurality of different cores. One embodiment of a core includes two sets of lookup tables to provide multiplication and add operations for the DCT and IDCT functions. Another embodiment of a core include one set of lookup tables, while another embodiment of a core includes no lookup table. The DCT/IDCT module provides forward DCT and IDCT functionality without the use of additional multipliers.

Abstract translation: 描述了用于图像信号的离散余弦变换和逆离散余弦变换（DCT / IDCT）的方法，装置，计算机介质和其他实施例。 DCT / IDCT模块包括多个不同的核。 核心的一个实施例包括两组查找表，用于为DCT和IDCT功能提供乘法和加法运算。 核心的另一实施例包括一组查找表，而核心的另一实施例不包括查找表。 DCT / IDCT模块提供前向DCT和IDCT功能，而不需要使用额外的乘法器。