Boots – shoes – and leggings
Patent
1993-06-24
1995-12-26
Mai, Tan V.
Boots, shoes, and leggings
G06F 738
Patent
active
054793645
ABSTRACT:
An IDCT, or Inverse Discrete Cosine Transform, method decimates a 2-D IDCT into two 1-D IDCT operations and then operates separately on the even and odd pixel input words. In a common processing step, selected input values are passed directly to output adders and subtractors, while others are multiplied by constant, scaled cosine values. In a pre-common processing step, the lowest-order odd input word is pre-multiplied by .sqroot.2, and the odd input words are summed pairwise before processing in a common processing step. In a post-common processing step, intermediate values corresponding to the processed odd input words are multiplied by predetermined coefficients to form odd resultant values. After calculation of the even and odd resultant values, the high-order and low-order outputs are formed by simple subtraction/addition, respectively, of the odd resultant values from/with the even resultant values. The input values are preferably scaled upward by a factor of .sqroot.2. Selected bits of some intermediate resulting data words are optionally adjusted by forcing these bits to either "1" or "0". The IDCT system includes a pre-common processing circuit (PREC), a common processing circuit (CBLK), and a post-common processing circuit (POSTC), which perform the necessary operations in the respective steps. The system also includes a controller (CNTL) to generate signals to control the loading of system latches and, preferably, to time-multiplex the application of the even and odd input words to latches in the pre-common circuit.
REFERENCES:
patent: 4849922 (1989-07-01), Riolfo
patent: 5257213 (1993-10-01), Kim et al.
patent: 5345408 (1994-09-01), Hoogenboom
Hsieh S. Hou "A Fast Recursive Algorithm for Computing the Discrete Cosine Transform" IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 35, No. 10, Oct., 1987, IEEE Press, New York, US pp. 1455-1461.
H. R. Wu, et al. "A Two Dimensional Fast Cosine Transform Algorithm Based on Hou's Approach" IEEE Transaction on Acoustics, Speech, and Signal Processing, vol. 39, No. 2, Feb., 1991, IEEE Press, New York, US pp. 544-546.
A. Gupta, et al. "A Fast Recursive Algorithm for the Discrete Sine Transform" IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 38, No. 3, Mar., 1990, IEEE Press, New York, US pp. 553-557.
P. Yip, et al. "DIT and DIF Algorithm for Discrete Sine and Cosine Transforms" Proceedings of the International Symposium on Circuits and Systems, IEEE Press, New York, US, vol. 2/3, 5 Jun. 1985, Kyoto, JP pp. 941-944.
Dewar Kevin D.
Jones Anthony M.
Sotheran Martin W.
Braun Robert T.
Clark Ronald J.
Discovision Associates
Mai Tan V.
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