Multiple point, discrete cosine processor

Details Multiple point, discrete cosine processor Multiple point, discrete cosine processor

1981-09-25

1984-05-15

Malzahn, David H.

Boots, shoes, and leggings

364757, G06F 15332, G06F 752

Patent

active

044491948

ABSTRACT:
A discrete cosine processor for video signals and the like wherein each term of a discrete cosine transform matrix is approximated by a power of 2 terms so that all mathematical steps are performed by shifting and/or subtracting digital data. The apparatus includes fully pipelined shifting circuits, circulating memories and a fully pipelined accumulator to provide the transformed terms.

REFERENCES:
patent: 3696235 (1972-10-01), Tufts et al.
patent: 4034198 (1977-07-01), Kindell
patent: 4080661 (1978-03-01), Niwa
patent: 4104729 (1978-08-01), Gingell
patent: 4152772 (1979-05-01), Speiser et al.
patent: 4196448 (1980-04-01), Whitehouse et al.
Ahmed et al., "Discrete Cosine Transform" IEEE Trans. on Computers Jan. 1974, pp. 90-93.

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