Two-dimensional discrete cosine transform processor

Details Two-dimensional discrete cosine transform processor Two-dimensional discrete cosine transform processor

G - Physics

06

T

354/160

G06T 9/00 (2006.01) G06F 17/14 (2006.01)

Patent

CA 1290854

Abstract of the Disclosure This processor is capable of real time processing of blocks of video pixel or other two- dimensional data to yield the two-dimensional Discrete Cosine Transform (DCT) thereof. The processor can be used as part of a video bandwidth or image compression system. The circuitry comprises a first one-dimensional DCT processor which simultaneously computes an entire row or column of vector inner products by using distributed arithmetic and using decimation-in-frequency to reduce the amount of memory capacity (ROM) required. Partial sums may also be used to further reduce ROM size. The one dimensional transformed matrix from the first processor is stored in a transposition memory and the transpose of the stored matrix is applied to a second one-dimensional DCT processor of similar circuitry which computes the desired two-dimensional DCT of the input data matrix.

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