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11. 发明授权

US07076105B2 Circuit and method for performing a two-dimensional transform during the processing of an image 有权
公开(公告)号：US07076105B2
公开(公告)日：2006-07-11
申请号：US09782509
申请日：2001-02-12
申请人： Woobin Lee
发明人： Woobin Lee
IPC分类号： G06K9/36
CPC分类号： H04N19/42 , G06F17/147 , H04N19/44 , H04N19/60
摘要： An image decoder performs a 2-D transform as a series of 1-D transforms, and does so in a more efficient manner than prior decoders. The decoder includes a memory and a processor coupled to the memory. The processor is operable to store a column of values in the memory as a row of values, combine the values within the stored row to generate a column of resulting values, and store the resulting values in the memory as a row of resulting values. Such an image decoder can store values in a memory register such that when the processor combines these values to generate intermediate IDCT values, it stores these intermediate IDCT values in a transposed fashion. Thus, such an image decoder reduces the image-processing time by combining the generating and transposing of the intermediate IDCT values into a single step. The image decoder can store the values in a memory register such that when the processor combines these values to generate the intermediate IDCT values, it stores these intermediate IDCT values in a transposed and even-odd-separated fashion. Thus, such an image decoder reduces the image-processing time by combining the generating, transposing, and even-odd separating of the intermediate IDCT values into a single step.

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