发明申请
US20080147765A1 Encoding and decoding data arrays using separate pre-multiplication stages
有权
使用单独的预乘法阶段对数据阵列进行编码和解码
- 专利标题: Encoding and decoding data arrays using separate pre-multiplication stages
- 专利标题(中): 使用单独的预乘法阶段对数据阵列进行编码和解码
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申请号: US12037061申请日: 2008-02-25
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公开(公告)号: US20080147765A1公开(公告)日: 2008-06-19
- 发明人: Roger Kumar , Maynard Handley , Thomas Pun , Xiaochun Nie , Hsi-Jung Wu
- 申请人: Roger Kumar , Maynard Handley , Thomas Pun , Xiaochun Nie , Hsi-Jung Wu
- 主分类号: G06F17/14
- IPC分类号: G06F17/14
摘要:
Some embodiments of the invention provide a method of performing a Discrete Cosine Transform (“DCT”) encoding or decoding coefficients of a data array by (1) multiplying the coefficients by a scalar value before the encoding or decoding, and then (2) dividing the encoded or decoded coefficients by the scalar value. When used in conjunction with fixed-point arithmetic, this method increases the precision of the encoded and decoded results. In addition, some embodiments provide a method of performing a two-dimensional (2D) Inverse Discrete Cosine Transform (“iDCT”). This method splits a pre-multiplication operation of the iDCT into two or more separate stages. When used in conjunction with fixed-point arithmetic, this splitting increases the precision of the decoded results of the iDCT.
公开/授权文献
- US08296348B2 Encoding and decoding data arrays 公开/授权日:2012-10-23
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