Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Xuemin Chen0
Krit Panusopone0
Date of Patent
March 9, 2010
0Patent Application Number
106138650
Date Filed
July 3, 2003
0Patent Primary Examiner
Patent abstract
Methods and apparatus for performing 2:1 downscaling on video data are provided. At least one input matrix of N×N (e.g., N=16) Discrete Cosine Transform (DCT) coefficients is formed from the video data by combining four N/2×N/2 field-mode DCT blocks. Vertical downsampling and de-interlacing are performed to the input matrix to obtain two N/2×N/2 frame-mode DCT blocks. An N×N/2 input matrix is formed from the two frame-mode DCT blocks. Horizontal downsampling is performed to the N×N/2 matrix to obtain one N/2×N/2 frame-mode DCT block.
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