The following two data structures help the DVD player to support random access playback, fast forward, and rewind operations at normal speed (1X) or various high-speed settings (2X, 4X, 8X, and 16X). Each video object unit (VOBU) is a self-contained multiplexed unit of video, audio, and sub-picture streams. Since the starting address of each video object unit is prerecorded in the VOB Unit Address Map data structure, playback can begin at the beginning of any video object unit without video and audio synchronization problem. The time map data structure may also be used to better estimate large jump at high-speed setting.

Video Title Set Cell Address (VTS_C_ADT)
Offset	Bytes	Description	Value
0	2	Number of VOBs ids in VTS_VOBS	3
2	2	Padding bytes
4	4	Address of last byte (length of table-1)	43
One or more VOB ids and Cell ids following
8	2	VOB Id	1
10	1	Cell Id	1
11	1	Padding byte
12	4	Start sector of this cell	0
16	4	End sector of this cell	1893
20	2	VOB Id	2
22	1	Cell Id	1
23	1	Padding byte
24	4	Start sector of this cell	1894
28	4	End sector of this cell	3517
32	2	VOB Id	3
34	1	Cell Id	1
35	1	Padding byte
36	4	Start sector of this cell	3518
40	4	End sector of this cell	5155

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