Patent ID: 8849088
Filing Date: 2014-09-30
Classification: G06F,G11B,H04N

Abstract:
1. A playback device for playing back a playlist via a virtual package constructed using a read-only optical disc and an accessible recording medium, wherein the playlist includes a plurality of playitems and a plurality of sub-playitems, wherein each playitem of the plurality of playitems is information defining a playback section in a clip file that includes a main stream, wherein each sub-playitem of the plurality of sub-playitems is information defining a playback section in a clip file that includes a sub-stream, wherein each of the clip files defined and referred to by the plurality of sub-playitems is transferred, wherein the playback device comprises: wherein merge management information, which defines a construction of the virtual package, indicates whether or not each respective clip file of the clip files has a progressive attribute indicating that the respective clip file does not need to exist in the accessible recording medium when the current sub-playitem referring to the respective clip file exists in the accessible recording medium, wherein the playback unit stops the playback of the current playitem of the plurality of playitems when the clip file, which is referred to by the current sub-playitem and has the progressive attribute, is in a missing state or an unrecognizable state in the accessible recording medium, wherein the playback unit continues the playback of the current playitem of the plurality of playitems when the clip file, which is referred to by the current sub-playitem and has the progressive attribute, exists in the accessible recording medium even if a next clip file of the pluralityof dip files, which is referred to by a next sub-playitem of the plurality of sub-playitems and has the progressive attribute, is in the missing state or the unrecognizable state in the accessible recording medium, and wherein the accessible recording medium includes a plurality of layered directories one of which is a disc ID directory corresponding to a disc ID recorded on the read-only optical disc, and the clip file referred to by the current sub-playitem is stored in a sub-directory under the disc ID directory.