发明申请
US20120179734A1 METHOD AND APPARATUS FOR DISCRETE COSINE TRANSFORM/INVERSE DISCRETE COSINE TRANSFORM
有权
用于离散COSINE变换/反向离散余弦变换的方法和装置
- 专利标题: METHOD AND APPARATUS FOR DISCRETE COSINE TRANSFORM/INVERSE DISCRETE COSINE TRANSFORM
- 专利标题(中): 用于离散COSINE变换/反向离散余弦变换的方法和装置
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申请号: US13496711申请日: 2010-07-09
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公开(公告)号: US20120179734A1公开(公告)日: 2012-07-12
- 发明人: Euee S. Jang , Kiho Choi , Sunyoung Lee , Sikyoung Kim
- 申请人: Euee S. Jang , Kiho Choi , Sunyoung Lee , Sikyoung Kim
- 国际申请: PCT/KR10/04462 WO 20100709
- 主分类号: G06F17/14
- IPC分类号: G06F17/14 ; G06F1/03
摘要:
Discrete cosine transform/inverse discrete cosine transform method and device are provided. The discrete cosine transform/inverse discrete cosine transform method includes: generating a table index for only an input value other than 0 (zero) out of input values of coordinates in an input block;reading one or more partial values corresponding to the table index out of a plurality of table information pieces which are generated and stored in advance so as to include partial values corresponding to a multiplication of a weight value and an index; and adding the read partial value and calculating the resultant value of each coordinate in an output block. Accordingly, it is possible to perform a fast DCT/IDCT operation and to reduce the energy consumption for the transform.