This directory must exist at the top level of the HD DVD. All files related with the Primary Video Set must reside within this directory. For Standard Content these are the VMG and and Standard Video Set(s) . For Advanced Content, these are the files for Advanced VTS.
Video Manager (VMG)
- The fixed filename for Video Manager Information shall be "HV000I01.IFO".
- The fixed filename for the First Play Menu EVOB, if any, shall be "HV000M01.EVO".
- The filenames for the VMG Menu EVOBs shall be "HV000Mxx.EVO".
- The fixed filename for the Video Manager Information backup shall be "HV000I01.BUP".
- xx shall be assigned consecutively from "02" to "99" for each EVOB, to keep files at 1 GB.
Standard Video Title Set (Standard VTS)
- The filename for Video Title Set Information shall be "HVxxxI01.IFO".
- The filenames for VTS Menu EVOBs shall be "HVxxxMyy.EVO".
- The filenames for VTS Title EVOBs shall be "HVxxxTyy.EVO".
- The filename for Video Title Set Information backup shall be "HVxxxI01.BUP".
- xxx shall be assigned consecutively from "001" to "511" for the files of the Video Title Set number.
- yy shall be assigned consecutively from "01" to "99" for each EVOB, to keep files at 1 GB.
Advanced Video Title Set (Advanced VTS)
- The filename for Video Title Set Information shall be "HVA00001.VTI".
- The filenames for VTS EVOBs shall have an extension of "EVO".
- The filenames for Time Map Information for Contiguous Block shall have the same body in the filename as that of the corresponding EVOB, with an extension of "MAP".
- The filenames for Time Map Information for Interleaved Blocks shall have the same body in the filename as that of corresponding EVOBs, with an extension of "MAP".
- The filenames of Time Map Information for Standard VTS referred to from Advanced Content shall be "HVS0xxxx.MAP".
- xxxx shall be four characters of "0001" to "1998" which is the same number as the EVOB index number assigned to each EVOBI and TMAP in the Video Title Set Information.
- The filename for Video Title Set Information backup shall be "HVA00001.BUP".
- The filename for Time Map Information backup shall have the same body in the filename as the corresponding Time Map Information, with an extension of "BUP".
Backup files are optional in Advanced VTS.