Discrete cosine transform method

Details Discrete cosine transform method Discrete cosine transform method

1997-03-06

1999-09-28

Moise, Emmanuel L.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

708203, 345154, 382250, G06F 1714

Patent

active

059579986

ABSTRACT:
When a weighted calculation in which a cosine-transformed coefficient is multiplied with diagonal matrixes from the right and left direction is carried out, a new transform matrix is obtained by previously multiplying a weighting diagonal matrix and the cosine transform matrix and input data is transformed by using the new transform matrix. Thus, a circuit scale can be reduced, the processing steps can be simplified, and the cost can be reduced. When a weighted calculation in which a cosine transformed coefficient C is multiplied with a diagonal matrix W from the right and left directions is carried out, the weighted cosine transform is carried out by using a new transform matrix Fw which results from previously multiplying the weighting diagonal matrix W and the cosine transform matrix F.

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patent: 5565921 (1996-10-01), Sasaki et al.
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