Invention Application
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
- Patent Title: Encoding and decoding data arrays using separate pre-multiplication stages
- Patent Title (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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Application No.: US12037061Application Date: 2008-02-25
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Publication No.: US20080147765A1Publication Date: 2008-06-19
- Inventor: Roger Kumar , Maynard Handley , Thomas Pun , Xiaochun Nie , Hsi-Jung Wu
- Applicant: Roger Kumar , Maynard Handley , Thomas Pun , Xiaochun Nie , Hsi-Jung Wu
- Main IPC: G06F17/14
- IPC: G06F17/14

Abstract:
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.
Public/Granted literature
- US08296348B2 Encoding and decoding data arrays Public/Granted day:2012-10-23
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