Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2006-02-28
2006-02-28
Mai, Tan V. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S401000
Reexamination Certificate
active
07007055
ABSTRACT:
A fast and precise method to perform inverse and forward Discrete Cosine Transform (DCT) is disclosed. The method may be used for implementing a two-dimensional (2D) inverse or forward DCT that operates on an N×M coefficient block and has a higher accuracy than is specified by the IEEE 1180-1990 standard (for the inverse operation). The disclosed method includes the following stages: based on integer operations, a fixed point one dimensional (1D) DCT may be performed on each row of an input coefficient block, an integer-to-single-precision floating point result conversion may be performed, and a single precision floating point 1D DCT may be performed on each column of the coefficient block resulting from the previous stages.
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Belenov Roman A.
Bratanov Stanislav V.
Knyazev Alexander N.
Zheltov Sergey N.
Intel Corporation
Mai Tan V.
Skabrat Steven P.
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