Optical recording medium and apparatus and method to play the optical recording medium

An apparatus to play a computer readable medium, the apparatus:

• a signal processor to read a stream of contents from the medium, the stream including an identification code and a predetermined subtitle code recorded in a reserved region, and to signal process the read stream to be displayed on a screen;
• a controller to determine whether the predetermined subtitle code is recorded according to whether the identification code is recorded in the reserved region of the stream of contents, to control the display of the predetermined subtitle code if the identification code is recorded, and to control the display of a general subtitle code if the identification code is not recorded in the reserved region,
• the reserved region is one of a predetermined information table, a presentation control information (PCI) packet, and a data search information (DSI) packet, and the predetermined information table is used to play the contents of the medium and the PCI and DSI packets are used to play the contents stored on the medium,
• the reserved region is in a predetermined information table, the predetermined information table being used to play the contents of the medium, and
• the predetermined subtitle code indicates a subtitle to be displayed in two or more languages simultaneously on the screen.

A method of playing a computer readable medium, the method comprising:

• analyzing a stream of contents that is read from the medium;
• determining whether a predetermined subtitle code is recorded according to whether a identification code is recorded in the reserved region of the stream;
• if the identification code is recorded in the reserved region,
• storing the predetermined subtitle code;
• outputting the stored predetermined subtitle code if a command execution key is activated;
• signal-processing the outputted predetermined subtitle code;
• and
• displaying the signal-processed predetermined subtitle code on a screen on which the contents of the played medium are displayed;
• and
• if the identification code is not recorded in the reserved region,
• storing a general subtitle code other than the predetermined subtitle code;
• outputting the stored general subtitle code if a command execution key is activated;
• signal-processing the outputted general subtitle code;
• and
• displaying the signal-processed general subtitle code on a screen on which the contents of the played medium are displayed,
• wherein, the reserved region is one of a predetermined information table, a presentation control information (PCI) packet, and a data search information (DSI) packet, and the predetermined information table is used to play the contents of the medium and the PCI and DSI packets are used to play the contents stored on the medium, and
• the predetermined subtitle code indicates a subtitle to be displayed in two or more languages simultaneously on the screen.

A computer readable medium on which data is recorded, the data comprising:

• contents;
• a predetermined subtitle code and a marking stored in a reserved region of one of a packet, a video title set information (VTSI) management table, or a video manager information (VMGI) management table,
• wherein the predetermined subtitle code are displayed with said contents on a screen according to whether said marking is recorded in the reserved region of the stream, said marking is an identification code to indicate that said predetermined subtitle code is recorded on the medium when having a first value, and indicates that the predetermined subtitle code is not recorded on the medium when having a second value other than the first value, and
• the predetermined subtitle code indicates a subtitle to be displayed in two or more languages simultaneously on the screen.