Apparatus for inverse discrete cosine transform

Details Apparatus for inverse discrete cosine transform Apparatus for inverse discrete cosine transform

1995-12-06

1998-03-03

Mai, Tan V.

Boots, shoes, and leggings

G06F 1714

Patent

active

057242780

ABSTRACT:
An inverse discrete cosine transform apparatus has operation units for operating a combination of plural basic operation matrixes, including rearrangement, addition, subtraction and multiplication. A coefficient C of multiplication is defined as C=cos (n.pi./16) (n:integer), and the basic operation matrixes are represented by equation (6), and operations of matrixes of addition and subtraction are carried out prior to operations of respective matrixes of multiplication.

REFERENCES:
patent: 5181183 (1993-01-01), Miyazaki
Ephraim Feig et al. "Fast Algorithms for the Discrete Cosine Transform"; IEEE Transactions on Signal Processing, vol. 40, No. 9, Sep. 1992; pp. 2174-2193.
IEEE Transactions on Signal Processing, "Fast Algorithms for the Discrete Cosine Transform", vol. 40, No. 9, Sep. 1992, pp. 2174-2193.
IEEE Proceedings, "Direct Methods for Computing Discrete Sinusoidal Transforms", vol. 137, No. 6, Dec. 1990, pp. 433-442.
Proceedings of the IEEE 1992 Custom Integrated Circuits Conference; "A 160 MPIXEL/SEC IDCT Processor For HDTV"; Boston, May 3-6, 1992; pp. 26.4.1-26.4.4

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