Question: please answer both question correctly...really need it now (b) Discrete cosine transform (DCT) is an important DSP tools to compress the signal. DCT transform and

please answer both question correctly...really need it now
(b) Discrete cosine transform (DCT) is an important DSP tools to compress the signal. DCT transform and inverse DCT equations are given as follows; [Jelmaan Kosain Diskrit (DCT) adalah merupakan perkakasan DSP yang penting untuk memampatkan isyarat. Persamaan DCT dan songsangan DCT diberikan seperti berikut;} N-1 DCT: Osk
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