Apparatus for inverse discrete cosine transform
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United States of America Patent
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Mar 3, 1998
Grant Date -
N/A
app pub date -
Dec 6, 1995
filing date -
Dec 6, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An inverse discrete cosine transform apparatus has operation units for operating a combination of plural basic operation matrixes, including rearrangement, addition, subtraction and multiplication. A coefficient C of multiplication is defined as C=cos (n.pi./16) (n:integer), and the basic operation matrixes are represented by equation (6), and operations of matrixes of addition and subtraction are carried out prior to operations of respective matrixes of multiplication.
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