Image encoder, image encoding method, image decoder, image decoding method, and distribution media

A high-efficient random access in feasible. The coding to a group of video plane (GOV) and a pressure time and a code voltage current layer and second 1 precision the code, the GOV layer is not only plug; the opening of the code voltage current moreover is inserted in the code flow voltage to the position; and GOV layer each video objective plane (VOP) tell time to indicate with modulo_time_base is a comparing unit is a pressure time as the standard to the second with the coding unit and pressure time and VOP_time_increment comprising a indicated is a millisecond as unit comprises a time according to modulo_time_base is indicated (synchronous of) elapsed time.