# Tables specific to the Video Title Set IFO

#### VTS_PTT_SRPT
VTS_PTT_SRPT
| VTS_PTT |
| : |
| VTS_PTT |
VTS_PTT_SRPT
offset | 0 | 1 | 2 | 3
--- | --- | --- | --- | ---
0 | number of titles | reserved
4 | end address (last byte of last VTS_PTT)
8 | offset to PTT for title 1
C ... | possible additional entries
| The VTS_PTT_SRPT contains pointers to the tables for each title, and is indexed by VTS_TTN (title number within VTS)
VTS_PTT
offset | 0 | 1 | 2 | 3
--- | --- | --- | --- | ---
0 | Program Chain (PGCN) | Program (PGN)
4 ... | possible additional entries
| The VTS_PTT contains pointers to the Program Chain (PGCN) and Program (PGN) for each Part-of-Title (PTT or Chapter), and is indexed by TT_PTTN (PTT number within title)
#### VTS_PGCI
VTS_PGCI
| VTS_PGC |
| : |
| VTS_PGC |
The VTS_PGCI contains a list of Program Chains (PGCs), and the PGCs themselves.
offset | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7
--- | --- | --- | --- | --- | --- | --- | --- | ---
0 | number of Program Chains | reserved | end address (last byte of last PGC) relative to VTS_PGCI
8 | PGC category, see below | offset to VTS_PGC, relative to VTS_PGCI
10 ... | possible additional entries
breakdown of the PGC category
byte | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
--- | --- | --- | --- | --- | --- | --- | --- | ---
0 | 1=entry PGC | title number
1 |
2 | parental management mask
3 | parental management mask
On to PGC description
#### VTSM_PGCI_UT The VTSM_PGCI_UT contains a number of tables forming a heirarchy. Most entries are 8 bytes long.
VTSM_PGCI_UT
| VTSM_LU |
|  | VTSM_PGC |  |
| : |
|  | VTSM_PGC |  |
:
| VTSM_LU |
|  | VTSM_PGC |  |
| : |
|  | VTSM_PGC |  |
At the top is the VTSM_PGCI_UT which lists all the Language Units.
offset | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7
--- | --- | --- | --- | --- | --- | --- | --- | ---
0 | number of Language Units | reserved | end address (last byte of last PGC in last LU) relative to VTSM_PGCI_UT
8 | ISO639 language code | reserved for language code extension | Menu existence flags 80 = root, 40 = sub-picture, 20 = audio, 10 = angle, 08 = PTT | offset to VTSM_LU, relative to VTSM_PGCI_UT
10 ... | possible additional entries
Next, the VTSM_LU which lists all the Program Chains.
offset | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7
--- | --- | --- | --- | --- | --- | --- | --- | ---
0 | number of Program Chains | reserved | end address (last byte of last PGC in this LU) relative to VTSM_LU
8 | PGC category, see below | offset to VTSM_PGC, relative to VTSM_LU
10 ... | possible additional entries
breakdown of the PGC category
byte | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
--- | --- | --- | --- | --- | --- | --- | --- | ---
0 | 1=entry PGC | reserved | menu type (entry only) 3 = root, 4 = sub-picture, 5 = audio, 6 = angle, 7 = PTT (chapter)
1 |
2 | parental management mask
3 | parental management mask
On to PGC description
#### VTS_TMAPTI This table contains time maps for each PGC.
VTS_TMAPTI
| VTS_TMAP |
| : |
| VTS_TMAP |
VTS_TMAPTI
offset | 0 | 1 | 2 | 3
--- | --- | --- | --- | ---
0 | number of program chains |
4 | end address (last byte of last VTS_TMAP)
8 | offset to VTS_TMAP 1 Note: each PGC MUST have a time map, even if it is empty
C ... | possible additional entries
VTS_TMAP
offset | 0 | 1 | 2 | 3
--- | --- | --- | --- | ---
0 | time unit (seconds) |  | number of entries in map 0 for empty map 2048 maximum
4 | sector offset within VOBS of vobu which begins on or before the time for this entry and ends after the time for this entry. bit 31 is set if the next time entry is for a different cell
8 ... | additional entries

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