Device for computing discrete cosine transform and inverse discr

Details Device for computing discrete cosine transform and inverse discr Device for computing discrete cosine transform and inverse discr

1996-04-24

1999-12-07

Malzahn, David H.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

G06F 1714

Patent

active

059999586

ABSTRACT:
Devices for computing discrete cosine transform, inverse discrete cosine transform or reduced ones, which require fewer transistors and less chip area, and which operate at a higher speed than those of the prior art. For example, the DCT/IDCT processor in the present invention essentially includes a matrix summation device and a plurality of shift adders. The matrix summation device computes a plurality of binary vectors from bits of an input vector, respectively for each term of an output vector. The shift-adding means respectively compute the terms of the output vector by sequentially left-shifting and adding the corresponding binary vectors.

REFERENCES:
patent: 4791598 (1988-12-01), Liou et al.
patent: 5285402 (1994-02-01), Keith
patent: 5357453 (1994-10-01), Kim et al.
patent: 5598361 (1997-01-01), Nagamatsu
patent: 5668748 (1997-09-01), Huang

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