发明名称 |
Method and Apparatus Converting moving Image, Method and Apparatus for Reproducing Moving Image, and Computer Program |
摘要 |
A down-sampling operation is performed on moving image data to reduce a sample count of the data to 1/M times the original sample count. In the down-sampling operation, a band-limitation operation is performed on the moving image data using a low-pass filter. The low-pass filter has a stop band frequency that prevents a harmonic component having a K-th order or higher, of harmonic components generated in the down-sampling operation, from overlapping an original signal component. The down-sampling operation is then performed on the band-limited moving image data, thereby compressing the moving image data. Aliasing distortion caused by a harmonic component of a high order is controlled. The resulting compressed image is free from a substantial loss of a high-frequency component of the original signal.
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申请公布号 |
US2009015710(A1) |
申请公布日期 |
2009.01.15 |
申请号 |
US20080169129 |
申请日期 |
2008.07.08 |
申请人 |
HIRASAWA YASUTAKA;KOBAYASHI SEIJI |
发明人 |
HIRASAWA YASUTAKA;KOBAYASHI SEIJI |
分类号 |
H04N5/917 |
主分类号 |
H04N5/917 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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