The first digital video coding standard was H.120, developed by the CCITT (now ITU-T) in 1984.[18] H.120 used motion-compensated DPCM coding,[2] which was inefficient for video coding,[3] and H.120 was thus impractical due to low performance.[18] The H.261 standard was developed in 1988 based on motion-compensated DCT compression,[17][4] and it was the first practical video coding standard.[18] Since then, motion-compensated DCT compression has been adopted by all the major video coding standards (including the H.26x and MPEG formats) that followed.[17][2]