Optical disc recording apparatus and method thereof

An optical disc recording apparatus to record unit data generated by division based on a specified reproduction unit according to a specified format on an optical disc, wherein the format is a DVD-video format, comprising:

• unit data group formation means for forming VTSTT_VOBS as a unit data group comprising at least one piece of unit data,
• wherein the unit data is a chapter (CHP);
• thumbnail image generation means for generating a CHP thumbnail image for the unit data;
• link information generation means for generating unit data link information included in VTSM_PGCI to link with each unit data forming the unit data group VTSTT_VOBS;
• data group generation means for generating VTS as a data group comprising a unit data group VTSTT_VOBS formed by the unit data group formation means and unit data link information generated by the link information generation means;
• and
• closed session processing means for performing a closed session process so that other reproducing apparatuses can read an optical disc recording at least one data group,
• wherein the closed session processing means generates a menu image including the CHP thumbnail image in the cell of VMGM_VOBS, which corresponds to a direct menu screen page capable of directly selecting CHP, generates menu image link information for linking with the menu image, and records the menu image and the menu image link information on the optical disc.