Abstract: A method of and an apparatus for guaranteeing seamless reproduction of data streams. The method relates to seamlessly reproducing of a plurality of data streams that include packet data with arrival time stamps determined to be unrelated to each other, the method including generating control information for controlling output times of the plurality of data streams for seamless reproduction, and continuously reproducing the plurality of data streams based on the generated control information. In particular, the control information may specify a reference time value and one of reproduction a gap length value and an offset value. Accordingly, a plurality of SOBs, ATSs of packet data of which are determined to be unrelated to each another may be seamlessly reproduced by adjusting the ATSs of packet data of subsequent SOBs using a reference time value.

Abstract: A method of processing a subtitle stream, a reproducing apparatus, and an information storage medium thereof. The information storage medium includes an AV stream, a subtitle stream which is displayed with the AV stream, and conversion information which indicates an instruction to change a format of the subtitle stream.

Abstract: A decoding apparatus and method for producing a browsable slide show and a data storage medium therefor. The decoding apparatus having a mainstream decoder, which decodes mainstream packet data including image data to be reproduced in a browsable slide show; a sub-audio decoder, which decodes sub-audio packet data including audio data attached to the image data; a mainstream system time clock (STC) counter, which provides an STC sequence for controlling the decoding time of the mainstream packet data to the mainstream decoder; and a sub-audio STC counter, which provides an STC sequence for controlling the decoding time of the sub-audio packet data to the sub-audio decoder. Accordingly, it is possible to seamlessly reproduce sub-audio data even when a user selects a forward or reverse play in the middle of reproducing still image data with the sub-audio data attached thereto in a browsable slide show.

Abstract: An information storage medium stores audio/video (AV) data; and interactive data for reproducing the AV data in an interactive mode. The interactive data includes a plurality of ENAV units, each of which is smaller than a predetermined size. When predetermined AV data is reproduced, a buffer is emptied when an ENAV is to be changed, and the ENAV unit to be changed is read in advance such that the buffer is managed to allow seamless reproduction of AV data.

Abstract: A method of and apparatus for synchronizing interactive contents. The apparatus includes a synchronized multimedia element determining unit and an application program interface (API). The synchronized multimedia element determining unit determines whether multimedia elements included in the interactive contents are synchronized with audio video (AV) contents. The API transmitting unit transmits an API corresponding to an interactive control command to an AV contents reproducing engine that reproduces the AV contents and a synchronized multimedia element reproducing engine that reproduces multimedia elements that are determined by the synchronized multimedia element determining unit to be synchronized with the AV contents.

Abstract: An information storage medium storing moving picture data and additional data, a reproducing apparatus and method therefor. The information storage medium stores core mode data which includes moving picture data having coded stream data of moving pictures and navigation data controlling playback of the moving picture data, full mode data which includes browser mode data made using a markup language and an execution script and/or program mode data made using a program language, and startup data which includes data designating mode data to be initially reproduced among the core mode data, the browser mode data, and the program mode data.

Abstract: A reproducing apparatus and method includes a reproducing unit to reproduce mainstream data and sub audio data separately added in the mainstream data, wherein the reproducing unit comprises a counter used in reproducing the sub audio data. Accordingly, it is possible to more naturally reproduce still image data, such as a browsable slide show, to which sub audio data is additionally included, thus preventing an interruption in reproduction of the sub audio data even during a forward or reverse play.

Abstract: An information storage medium includes: AV data; interactive data, which is displayed along with an AV picture obtained from the AV data, and provides contents related to the AV picture, when the AV data is reproduced in an interactive mode; and language information, which indicates a language of contents contained in the interactive data. Therefore, it is possible to select an ENAV application to be first executed in the interactive mode and reproduces the selected ENAV application with a language readable by a user.

Abstract: An information storage medium includes: AV data; interactive data, which is displayed along with an AV picture obtained from the AV data, and provides contents related to the AV picture, when the AV data is reproduced in an interactive mode; and language information, which indicates a language of contents contained in the interactive data. Therefore, it is possible to select an ENAV application to be first executed in the interactive mode and reproduces the selected ENAV application with a language readable by a user.

Abstract: A data recording and reproducing apparatus supporting multi-path recording reproduction, and an information storage medium on which multi-path data is recorded. The information storage medium includes at least one clip that is a recording unit containing presentation data for respective paths, wherein presentation data in a selected path is continuously reproduced without changing paths, and additional path information regarding a block of the path is recorded separately from the presentation data. Accordingly, it is possible to more effectively use a recording space and reduce the frequency of jumping to clips, thereby effectively reading the multi-path presentation data from the information storage medium.

Abstract: An information storage medium on which a plurality of titles are recorded, and a reproducing apparatus and method thereof. The information storage medium includes a plurality of titles which are reproduced as motion pictures and a plurality of units of attribute information that correspond to the titles and indicate whether a user can control a title to be reproduced. Therefore, efficient navigation can be ensured and the titles can be reproduced as a manufacturer of the information storage medium has planned.

Abstract: A method and apparatus for mixing audio streams, and an information storage medium that stores mixing information. The information storage medium includes at least one audio stream that contains a multiplicity of audio data obtained from respective multiple channels, and mixing information used to mix at least parts of the multiplicity of audio data. Accordingly, it is possible to mix and reproduce different types of channel components without changing the channel formats of different audio streams. Furthermore, it is also possible to perform dynamic mixing on multiple channel components, thus enabling adaptation to a change in audio content and characteristics thereof and thereby reproducing audio data more appropriately. In particular, since mixing information is described in interactive data allowing an interaction with a user, it is possible to provide the user with more applications.

Abstract: A method and apparatus for mixing audio streams, and an information storage medium that stores mixing information. The information storage medium includes at least one audio stream that contains a multiplicity of audio data obtained from respective multiple channels, and mixing information used to mix at least parts of the multiplicity of audio data. Accordingly, it is possible to mix and reproduce different types of channel components without changing the channel formats of different audio streams. Furthermore, it is also possible to perform dynamic mixing on multiple channel components, thus enabling adaptation to a change in audio content and characteristics thereof and thereby reproducing audio data more appropriately. In particular, since mixing information is described in interactive data allowing an interaction with a user, it is possible to provide the user with more applications.

Abstract: An information storage medium storing at least one still image data clip including: at least one still image data file; still image clip information including information on a position and attributes of still images in the at least one still image data file; and still image sequence information including information on presentation modes and a presentation time for the still images in the at least one still image data file.

Abstract: An information storage medium which stores data structures supporting multi-angles includes clip AV streams for respective angle data of multi-angle motion picture data. As additional information for each clip AV stream, clip information is recorded on a separate storage area from that of the clip AV streams. The clip information includes jumping-point information for jumping into another angle. Each of the clip AV streams may be recorded in a contiguous recording area, or divided into smaller interleaved units that are interleaved with units of the other clip AV streams.

Abstract: An information storage medium for storing data structures supporting multi-angles is provided. The information storage medium includes clips as recording units of motion picture data for respective angles. As additional information for each clip, clip information is recorded on a separate storage area from the clip. The clip information includes jumping-point information for jumping into another angle. At least one clip for a desired angle can be divided and recorded in contiguous recording area of the information storage medium, or can be divided into smaller interleaved units, multiplexed, and recorded. Therefore, it is possible to easily track and reproduce motion picture data for multi-angle and also facilitate recording area arrangement when one clip is recorded in a contiguous storage area.

Abstract: An information storage medium on which multi-angle data is recorded includes at least two clips in each of which video object data for an angle of the multi-angle data is recorded. The at least two clips are recorded in contiguous areas of the information storage medium.

Abstract: Provided are a method to display a mark-up document according to a parental level, a method and an apparatus for reproducing AV data in an interactive mode, and a data storage medium. The data storage medium includes the AV data, and mark-up documents to reproduce the AV data in an interactive mode. Here, among the mark-up documents, a start-up document contains information on the mark-up documents to be displayed according to a set parental level.

Abstract: Browser graphics can be displayed according to an aspect ratio by providing a browser graphic storage unit storing browser graphics of different aspect ratios according to their aspect ratio, and an initialization file storage unit storing an initialization file including predetermined aspect ratio information. An aspect ratio information extractor extracts the aspect ratio information from the stored initialization file and a browser graphic selector selects a browser graphic from the stored browser graphics of different aspect ratios that corresponds to the extracted aspect ratio. A browser graphic display unit displays the selected browser graphic. Browser graphics having various aspect ratios are used to prevent the browser graphics from being distorted when displayed on various types of display devices, and to display the browser graphics corresponding to a default aspect ratio set by a contents producer, a request of a user, or characteristics of a display device.

Abstract: An information storage medium which stores data structures supporting multi-angles includes clip AV streams for respective angle data of multi-angle motion picture data. As additional information for each clip AV stream, clip information is recorded on a separate storage area from that of the clip AV streams. The clip information includes jumping-point information for jumping into another angle. Each of the clip AV streams may be recorded in a contiguous recording area, or divided into smaller interleaved units that are interleaved with units of the other clip AV streams.