APPARATUS FOR CALCULATING DISCRETE COSINE TRANSFORM Russian patent published in 2011 - IPC G06F17/14 

FIELD: information technology.

SUBSTANCE: invention is intended for use in digital high-speed devices whose operation employs discrete cosine transform for encoding video and audio data. The device for calculating discrete cosine transform consists of a demultiplexer, a first scalar multiplier, a second scalar multiplier, a real coefficient generator, a first fast Fourier transform unit, a second fast Fourier transform unit, an imaginary coefficient generator, a first complex multiplier, a second complex multiplier, a multiplexer and a comparator.

EFFECT: few calculation operations, high-speed operation owing to paralleling of calculation operations and possibility of calculating variable-length discrete cosine transform.

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