Discrete cosine transform

principle · 1972 · Digital age

The basis of image and video compression (Ahmed).

Where it is used

• Video compression — is used in. DCT.
• JPEG — is used in. DCT of 8×8 blocks.
• MP3 — is used in. A modified DCT.

History: what it evolved from and what it influenced

• Fourier transform — evolved from. A related transform.

Open Evothings