发明名称 |
FAST ALGORITHMS FOR COMPUTATION OF 5-POINT DCT-II, DCT-IV, AND DST-IV, AND ARCHITECTURES |
摘要 |
<p>A more efficient encoder/decoder is provided in which an N-point MDCT transform is mapped into smaller sized N/2-point DCT-IV, DST-IV and/or DCT-II transforms. The MDCT may be systematically decimated by factor of 2 by utilizing a uniformly scaled 5-point DCT-II core function as opposed to the DCT-IV or FFT cores used in many existing MDCT designs in audio codecs. Various transform factorizations of the 5-point transforms may be implemented to more efficiently implement a transform.</p> |
申请公布号 |
WO2009076666(A1) |
申请公布日期 |
2009.06.18 |
申请号 |
WO2008US86739 |
申请日期 |
2008.12.13 |
申请人 |
QUALCOMM INCORPORATED;REZNIK, YURIY;CHIVUKULA, RAVI KIRAN |
发明人 |
REZNIK, YURIY;CHIVUKULA, RAVI KIRAN |
分类号 |
G10L19/02;G06F17/14 |
主分类号 |
G10L19/02 |
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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