Simple quick image processing apparatus for performing a discret

Details Simple quick image processing apparatus for performing a discret Simple quick image processing apparatus for performing a discret

1993-08-24

1995-05-30

Malzahn, David H.

Boots, shoes, and leggings

382276, G06F 15332

Patent

active

054208114

ABSTRACT:
A discrete cosine transformation (DCT) system and an inverse discrete cosine transformation (IDCT) system each having a simple circuit construction and high speed operation. A two-dimensional 4.times.4 DCT system, for example, performs a computation: [Y]=1/8.multidot.[W].multidot.[V].multidot.[T].multidot.[R].multidot.[L].m ultidot.[Q].multidot.[X]. A first rearrangement circuit rearranges input data [X] in accordance with factors "1" in matrix [Q]. A first inner product computation circuit multiplies the result by a constant matrix [L] having "+1" and "1" factors. A second rearrangement circuit rearranges the results in accordance with factors "1" in matrix [R]. A second inner product computation circuit multiplies the results by matrix [T] constituted by factors "0", "1", and "-1". A third inner product computation circuit multiplies the results by a matrix [V] having coefficients of irrational numbers in a DCT. Finally, a third rearrangement circuit rearranges the results in accordance with factors "1" in matrix [W].

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