Analysis of information sources in references of the Wikipedia article "Video coding format" in English language version.
A significant advance in image coding methodology occurred with the introduction of the concept of hybrid transform/DPCM coding (Habibi, 1974).
H.263 is similar to, but more complex than H.261. It is currently the most widely used international video compression standard for video telephony on ISDN (Integrated Services Digital Network) telephone lines.