发明授权
US09319685B2 8-point inverse discrete cosine transform including odd and even portions for media data coding
有权
包括用于媒体数据编码的奇数和偶数部分的8点逆离散余弦变换
- 专利标题: 8-point inverse discrete cosine transform including odd and even portions for media data coding
- 专利标题(中): 包括用于媒体数据编码的奇数和偶数部分的8点逆离散余弦变换
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申请号: US13765040申请日: 2013-02-12
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公开(公告)号: US09319685B2公开(公告)日: 2016-04-19
- 发明人: Yuriy Reznik , Rajan Laxman Joshi , Marta Karczewicz
- 申请人: Qualcomm Incorporated
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 当前专利权人地址: US CA San Diego
- 代理商 Brent Boyd
- 主分类号: H04N7/12
- IPC分类号: H04N7/12 ; H04N19/625 ; G06F17/14 ; H04N19/60
摘要:
In general, techniques are described for implementing an 8-point inverse discrete cosine transform (IDCT). An apparatus comprising an 8-point inverse discrete cosine transform (IDCT) hardware unit may implement these techniques to transform media data from a frequency domain to a spatial domain. The 8-point IDCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point IDCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third, fourth, fifth and sixth internal factors.
公开/授权文献
- US20130148718A1 8-POINT TRANSFORM FOR MEDIA DATA CODING 公开/授权日:2013-06-13
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