Invention Application
US20090157785A1 FAST ALGORITHMS FOR COMPUTATION OF 5-POINT DCT-II, DCT-IV, AND DST-IV, AND ARCHITECTURES
有权
用于计算5点DCT-II，DCT-IV和DST-IV以及架构的快速算法
- Patent Title: FAST ALGORITHMS FOR COMPUTATION OF 5-POINT DCT-II, DCT-IV, AND DST-IV, AND ARCHITECTURES
- Patent Title (中): 用于计算5点DCT-II，DCT-IV和DST-IV以及架构的快速算法
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Application No.: US12334238Application Date: 2008-12-12
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Publication No.: US20090157785A1Publication Date: 2009-06-18
- Inventor: Yuriy Reznik , Ravi Kiran Chivukula
- Applicant: Yuriy Reznik , Ravi Kiran Chivukula
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Main IPC: G06F17/14
- IPC: G06F17/14
Abstract:
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.
Public/Granted literature
- US08631060B2 Fast algorithms for computation of 5-point DCT-II, DCT-IV, and DST-IV, and architectures Public/Granted day:2014-01-14
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