 pictures are herein referred to as the target pictures. scene_info_present_flag equal to 0 indicates that the scene or scene transition to which the target pictures belong is unspecified. scene_info_present_flag equal to 1 indicates that the target pictures belong to the same scene or scene transition. scene id identifies the scene to which the target pictures belong. When the value of scene_transition_type of the target pictures is less than 4, and the previous picture in output order is marked with a value of tene transition type less than 4, and the value of scene id is the same as the value of scene_id of the previous picture in output order, this indicates that the source scene for the target pictures and the source scene for the previous picture (in output order) are considered by the encoder to have been the same scene. When the value of scene_transition_t type of the target pictures is greater than 3, and the previous picture in output order is marked with a value of scene_transition_ty less than 4, and the value of scene is the same as the value of scene of the previous picture in output order, this indicates that one of the source scenes for the target pictures and the source scene for the previous picture (in output order) are considered by the encoder to have been the same scene. When the value of scene id is not equal to the value of scene id of the previous picture in output order, this indicates that the target pictures and the previous picture (in output order) are considered by the encoder to have been from different source scenes. The value of scene id shall be in the range of 0 to 232 2, inclusive. Values of scene id in the range of 0 to 255, inclusive, and in the range of 512 to 231 - 1, inclusive, may be used as determined by the application. Values of scene id in the range of 256 to 511, inclusive, and in the range of 231 to 232 - 2, inclusive, are reserved for future use by TU-TI ISO/IEC. Decoders encountering a value of scene id in the range of 256 to 511, inclusive, or in the range of 23