Picture coding device and method, picture decodingdevice and method.

摘要

Efficient random access is made possible. A group of video plane (GOV) layers in which encoding start absolute time is arranged to be within an accuracy of a second is provided as the layer of a coded bit stream. The GOV layer can be inserted not only at the head of the coded bit stream but at an arbitrary position in the coded bit stream. The display time of each video object plane (VOP) constituting the GOV layer is represented by modulo_time_base which represents absolute time in the unit of a second with the encoding start absolute time as standard and VOP_time_increment which represents in the unit of a millisecond the time that has elapsed since time (synchronization point) indicated by the modulo_time_base. <IMAGE>