Patent ID: 7415190

Claim:
An apparatus comprises an optical recording medium to store information to cause a reproducing apparatus to display at least portions of the information on a screen, the information comprising: a marking; a command; contents, one of said contents comprising a packet having a reserved region; and a predetermined command code recorded on the optical recording medium, so that, when said contents are reproduced from the optical recording medium by the reproducing apparatus, said marking and said command are moved onto a predetermined position of the screen on which said contents are being displayed as streaming contents; wherein said predetermined command code is recorded on the reserved region of the packet, wherein said marking is an identification code that indicates that said command is recorded on the optical recording medium, wherein whether the identification code is recorded in the reserved region of the recording medium determines whether the command is recorded in the reserved region, wherein the command is one of a command to set predetermined parameters of the apparatus and another command to display information on a predetermined portion of the screen on which the contents are being displayed, wherein: the command is to change the parameters to display a predetermined language in a subtitle to be displayed on the screen and to change the parameters to play an audio track of a predetermined language, the information displayed on the predetermined portion of the screen includes information on grammar related to the contents being displayed on the screen, and the information displayed on the predetermined portion of the screen includes information on phrases being conveyed using the contents being displayed on the screen, wherein the identification code and the predetermined command code in the reserved region are located in one of a predetermined presentation control information (PCI) packet and a data search information (DSI) packet, which are used by the apparatus to play the optical recording medium.