发明名称 |
Inverse discrete cosine transform processor. |
摘要 |
<p>A method and apparatus (10) are provided for inverse transforming a matrix of discrete cosine transform (DCT) coefficients. The DCT coefficients are processed at least two bits at a time to obtain the vector dot products thereof with a DCT kernel matrix. A matrix of the vector dot products is transposed (112) to obtain a transposed matrix of dot product elements. The dot product elements of the transposed matrix are processed at least two bits at a time to obtain the vector dot products thereof with the DCT kernel matrix. The resultant dot products are interleaved into a proper order and buffered in a series of output registers (118). Further efficiencies are achieved by implementing a post-add stage (104) of an IDCT flowgraph prior to the output registers. <IMAGE></p> |
申请公布号 |
EP0621543(A2) |
申请公布日期 |
1994.10.26 |
申请号 |
EP19940105689 |
申请日期 |
1994.04.13 |
申请人 |
NEXTLEVEL SYSTEMS, INC. |
发明人 |
HOOGENBOOM, CHRISTOPHER L. |
分类号 |
H04N7/30;G06F17/14;G06T1/20;H03M7/30;H04N1/41;(IPC1-7):G06F15/332;H04N7/133 |
主分类号 |
H04N7/30 |
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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