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Relation of Cosine
Posted:
Jul 22, 1996 5:38 AM


I'm designing a discrete cosine transform hardware for decoding MPEG format. It need twodimension IDCT. In order to reduce area of gate design so I have to do a fast cosine transformation. Anyone has comment about it or can suggest me about how to reduce instuction please write to me.
Now I want to know about relation of cos(1/16)PI , cos(2/16)PI ,..., cos(7/16)PI in mathematical
cos(1/16) PI = sqrt(2+sqr(2+sqrt(2)))/2 cos(2/16) PI = sqrt(2+sqr))/2 cos(3/16) PI = sqrt(2+sqr(2sqrt(2)))/2 cos(4/16) PI = sqrt(2)/2 cos(5/16) PI = sqrt(2sqr(2sqrt(2)))/2 cos(6/16) PI = sqrt(2sqr))/2 cos(7/16) PI = sqrt(2sqr(2+sqrt(2)))/2
 Best Wishes, ==================== N a v a p o r n W a n v i m o n s r i http://www2.cp.eng.chula.ac.th/~g38nwv ====================



