To determine whether or not a correct continuous reproduction disk has been attached, and perform control in accordance with a determination result in a data reproduction process including a first information recording medium and a second information recording medium. A first root certificate transform value is calculated by applying a first transform function to data constituting a first root certificate recorded in the first information recording medium and a second root certificate transform value is calculated by applying a second transform function to data constituting a second root certificate recorded in the second information recording medium. Transform values based on first and second root certificates are compared. A process under execution is continued when the first and second root certificate transform values match. However, the process under execution is stooped or a warning is output when the first and second root certificate transform values do not match.

Data including a digital stream file obtained by encoding video information is recorded in a recording medium. A recording region of the recording medium has a first recording region where reading is performed at a first read rate, and a second recording region where reading is performed at a second read rate that is faster than the first read rate. The data includes a digital stream file having real-time attributes and a data file having non-real-time attributes. The data file to be read in during playback of the digital stream file is recorded in, of the first recording region and the second recording region, the same recording region where the digital stream file being played is recorded.

A playback device is provided that includes a readout unit that reads out data recorded in a recording medium and a playback unit. Data including a digital stream file obtained by encoding video information is recorded in the recording medium. A recording region of the recording medium has a first recording region where reading is performed at a first read rate, and a second recording region where reading is performed at a second read rate that is faster than the first read rate. In a file system, the data is classified into the digital stream file having real-time attributes and a data file having non-real-time attributes, wherein the data file read in during playback of the digital stream file is recorded in the same recording region where the digital stream file being played is recorded. The readout unit reads out the data without changing the first or second read rate.

A display processing apparatus acquires a plurality of images and time data corresponding to the respective images. The display processing apparatus selects, as the time interval at which the plurality of images are switched and displayed one by one, either a time interval based on the difference between time data corresponding to images before and after switching, or a predetermined interval. The display processing apparatus switches the plurality of images at the selected time interval, and displays them on a display device.

For playing an interactive audiovisual movie, stored in a data store of a computerized playback device is a movie episode data object which comprises a plurality of audio/video segments, separate audio tracks, and playback instructions. The playback device retrieves the playback instructions and, in accordance with the playback instructions, retrieves and plays audio/video segments, generates interface elements for receiving from a user decision commands while playing the audio/video segments, and retrieves and plays further audio/video segments depending on the user decision commands. The playback device further retrieves one of the separate audio tracks and plays the separate audio track uninterruptedly while playing an end of a first audio/video segment and a start of a second audio/video segment which is played subsequently to the first audio/video segment. Thus, an audio track is played uninterruptedly across the boundary of two consecutive audio/video segments.

For playing an interactive audiovisual movie, stored in a data store of a computerized playback device is a movie episode data object which comprises a plurality of audio/video segments, separate audio tracks, and playback instructions. The playback device retrieves the playback instructions and, in accordance with the playback instructions, retrieves and plays audio/video segments, generates interface elements for receiving from a user decision commands while playing the audio/video segments, and retrieves and plays further audio/video segments depending on the user decision commands. The playback device further retrieves one of the separate audio tracks and plays the separate audio track uninterruptedly while playing an end of a first audio/video segment and a start of a second audio/video segment which is played subsequently to the first audio/video segment. Thus, an audio track is played uninterruptedly across the boundary of two consecutive audio/video segments.

The present invention relates to a method for the reproduction, through an audio/visual means, of a film and an apparatus for the reproduction of the same. More particularly, the method according to the present invention allows more viewings of the same film such that the film itself is automatically composed as to be different at each viewing. The method for the reproduction of a film is finalized to the creation of a multifilm, i.e. a film that changes its plot in every reproduction.

Image reproduction according to a display apparatus is realized by acquiring image information of an ultra-high definition (UHD) image from a playlist file or a clip information file. A data processing unit that performs a reproduction process of a disc recording data acquires a playlist file or a clip information file as a reproduction control information file corresponding to reproduction data recorded in a disc, determines whether or not an ultra-high definition (UHD) image is recorded in the disc based on recording data of such a file, and, in a case where the ultra-high definition (UHD) image is recorded in the disc, acquires image information of the ultra-high definition (UHD) image from the reproduction control information and controls output data for a display apparatus based on the acquired image information.

For playing an interactive audiovisual movie, a movie episode data object which comprises a plurality of audio/video segments, separate audio tracks, and playback instructions is stored (51) in a data store of a computerized playback device. The playback device retrieves (52) the playback instructions and, in accordance with the playback instructions, retrieves (S31) and plays (532) audio/video segments, generates (535) interface elements for receiving from a user decision commands while playing the audio/video segments, and retrieves (S31) and plays (S32) further audio/video segments depending on the user decision commands. The playback device further retrieves (S33) one of the separate audio tracks and plays (S34) the separate audio track uninterruptedly while playing an end of a first audio/video segment and a start of a second audio/video segment which is played subsequently to the first audio/video segment. Thus, an audio track is played uninterruptedly across the boundary of two consecutive audio/video segments.

For playing an interactive audiovisual movie, a movie episode data object which comprises a plurality of audio/video segments, separate audio tracks, and playback instructions is stored (51) in a data store of a computerized playback device. The playback device retrieves (52) the playback instructions and, in accordance with the playback instructions, retrieves (S31) and plays (532) audio/video segments, generates (535) interface elements for receiving from a user decision commands while playing the audio/video segments, and retrieves (S31) and plays (S32) further audio/video segments depending on the user decision commands. The playback device further retrieves (S33) one of the separate audio tracks and plays (S34) the separate audio track uninterruptedly while playing an end of a first audio/video segment and a start of a second audio/video segment which is played subsequently to the first audio/video segment. Thus, an audio track is played uninterruptedly across the boundary of two consecutive audio/video segments.