Fourier transform generator for bi-level samples

Details Fourier transform generator for bi-level samples Fourier transform generator for bi-level samples

1976-03-10

1978-04-11

Malzahn, David H.

Boots, shoes, and leggings

G06F 1534

Patent

active

040842517

ABSTRACT:
Apparatus is provided for computing the Fourier coefficients of a finite block of bi-level bits. This is accomplished by formating the finite block of bits into an even function which is symmetrical about an origin such that both the data bits and a mirror image thereof are contained in a data block of N bits. This permits computation of a Fourier transform which will result in only cosine terms by the relatively simple Fourier transform generator structures disclosed herein. In one embodiment, a plurality of coefficients are generated simultaneously.

REFERENCES:
patent: 3515990 (1970-06-01), Robertson
patent: 3638004 (1972-01-01), Sloane et al.
patent: 3778604 (1973-11-01), Bosc et al.
patent: 3920974 (1975-11-01), Means
N. Ahmed et al., "Discrete Cosine Transform", IEEE Trans. on Computers, Jan. 1974, pp. 90-93.

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