Discrete cosine transform processor

Details Discrete cosine transform processor Discrete cosine transform processor

1994-10-26

1997-01-28

Ngo, Chuong D.

Boots, shoes, and leggings

G06F 1714

Patent

active

055983618

ABSTRACT:
A discrete cosine transform processor for executing discrete cosine transform calculations in both forward and inverse directions on the basis of previously stored product addition data has a memory having a first memory section for storing product addition calculation data for the forward direction transformation and a second memory section for storing product addition calculation data for the inverse direction transformation other than data in common to those stored in the first memory section; and sign inverter for inverting signs of the data used in common for the inverse direction transformation, among the data stored in the first memory section. The memory preferably includes first memory for storing product addition data corresponding to even-order coefficients and second memory for storing product addition data corresponding to odd-order coefficients; and only the second memory stores data used in common for both the forward and inverse direction transformations in the first memory thereof.

REFERENCES:
patent: 4829465 (1989-05-01), Knauer et al.
patent: 4831574 (1989-05-01), Duhamel
patent: 5249146 (1993-09-01), Uramoto et al.
patent: 5268853 (1993-12-01), Tanaka et al.
patent: 5357453 (1994-10-01), Kim et al.
patent: 5361220 (1994-11-01), Asano
Shin-ichi Uramoto, et al., "A 100-MHz 2-D Discrete Cosine Transform Core Processor", IEEE Journal of Solid-State Circuits, vol. 27, No. 4, Apr. 1992, pp. 390-396.
Kunitoshi Aono, et al., "A Video Digital Signal Processor with a Vector-Pipeline Architecture", IEEE Journal of Solid-State Circuits, vol. 27, No. 12, Dec. 1992, pp. 1886-1894.
Haralambos C. Karathanasis, "On Computing the 2-D Cosine Transform Using Rotations", Microprocessing and Microprogramming, vol. 38, Sep. 1993, pp. 359-365.
Weiping Li, "A New Algorithm to Compute the DCT and its Inverse", IEEE Transactions on Acoustics, Speech and Signal Processing, vol. 39, No. 6, Jun. 1991, pp. 1305-1313.

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