发明名称 |
REVERSIBLE 2-DIMENSIONAL PRE-/POST-FILTERING FOR LAPPED BIORTHOGONAL TRANSFORM |
摘要 |
An efficient lapped transform useable in digital media codecs is realized using a reversible 2-dimensional overlap operator for pre/post filtering that is applied on a staggered grid relative to a core transform. The 2-dimensional lapped operator is based on a separably applied 1-dimensional reversible lapped operator, which is re- arranged as a sequence of elementary transforms in interleaved stages on subsets of points of the respective block and further implemented in lifting steps for computational efficiency. The interleaved stages include applying rotation and scaling stages between initial and final stages involving a normalized 2x2 Hadamard transform |
申请公布号 |
CA2529914(C) |
申请公布日期 |
2014.01.28 |
申请号 |
CA20052529914 |
申请日期 |
2005.12.13 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
TU, CHENGJIE;SRINIVASAN, SRIDHAR |
分类号 |
H03M7/30;G06F17/10;G06T9/00;G10L19/02;G10L19/26 |
主分类号 |
H03M7/30 |
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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