Meanwhile, many video compression standards such as MPEG-1 and MPEG-2 employ DCT(Discrete Cosine Transform) and IDCT(Inverse Discrete Cosine Transform) in coding and decoding.

• 同时，许多视频压缩标准如MPEG-1和MPEG-2等均采用离散余弦变换(DCT: Discrete Cosine Transform)及离散余弦反变换(IDCT: Inverse Discrete Cosine Transform)进行编解码。