DCT rapid changing structure
A fast, serial conversion technology, applied in image data processing, TV, color TV, etc., can solve the problems of consuming wiring resources, large circuit area, and large amount of calculation, and achieve the goals of saving wiring resources, reducing area, and improving calculation speed Effect
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[0063] The DCT device of this embodiment takes 8×8 as a unit of image block, inputs one row or one column of image data at a time, uses table lookup operation instead of multiplication operation, and completes fast DCT transformation.
[0064] Suppose we want to implement the following formula:
[0065] y ( n ) = Σ k = 1 K A k x k ( n ) - - - - - - - ( 10 )
[0066] where A k is a constant, and x k is a variable expressed in two's complement notation. For the convenience of derivation, the x k It is limited in the range of ±1 (the actual situation does not necessarily meet this...
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