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Information storage medium, information reproducing apparatus, and information reproducing methodRelated Patent Categories: Television Signal Processing For Dynamic Recording Or Reproducing, Processing Of Television Signal For Dynamic Recording Or Reproducing, Using Disc, OpticalInformation storage medium, information reproducing apparatus, and information reproducing method description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070196080, Information storage medium, information reproducing apparatus, and information reproducing method. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATION [0001] This application is a Continuation of co-pending application Ser. No. 10/421,836, filed on Apr. 24, 2003, the entire contents of which are hereby incorporated by reference and for which priority is claimed under 35 U.S.C. .sctn. 120. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a method for managing recording and reproduction of a multi-dubbed audio stream corresponding to an A/V stream recorded on a storage medium such as a high-density rewritable optical disc. [0004] 2. Description of the Related Art [0005] Recently, standardization of new high-density rewritable optical discs has rapidly progressed, for example, BD-RE (Blu-Ray Disc Rewritable), which can store a large quantity of high-quality video and audio data. As a result, products associated with such discs have also been developed. Such products are expected to be commercially available in the near future. [0006] FIG. 1 illustrates apart of the configuration of an optical disc apparatus such as a video disc recorder (VDR) for recording or reproducing signals recorded on a storage medium such as a BD-RE. As shown in FIG. 1, the optical disc apparatus includes an optical pickup 2 for reading out a signal recorded on a storage medium 1 such as a BD-RE or recording a data stream externally inputted thereto and subjected to a signal processing procedure, a VDR system 3 for reproducing the signal read out by the optical pickup 2 or converting a data stream externally inputted thereto into a data stream to be appropriately recordable, and an encoder 4 for encoding an analog signal externally inputted thereto, and outputting the encoded signal to the VDR system 3. [0007] The VDR system 3 of the optical disc apparatus having the above mentioned configuration may manage recording of a dubbed audio stream, as an auxiliary audio stream, corresponding to the A/V stream recorded on the BD-RE1. This will be described in detail hereinafter. [0008] FIG. 2 illustrates a linked condition between real play lists and virtual play lists in a rewritable optical disc, for example, a BD-RE. A/V streams are sequentially recorded on a BD-RE, for example, the BD-RE 1 of FIG. 1, in the unit of clips, and managed for recording and reproduction thereof by real play lists containing play control information for reading and reproduction of the A/V streams in the unit of clips and being recorded on the BD-RE 1, respectively. For example, a main A/V stream corresponding to a first clip, that is, a first clip main A/V stream (Clip 1 Main A/V Stream), is managed for its recording and reproduction by a first real play list (Real PlayList 1) containing play control information for reading and reproduction of the first clip main A/V stream, as shown in FIG. 2. [0009] Meanwhile, a dubbed audio stream corresponding to a clip main stream is additionally recorded on the BD-RE 1 as a new clip auxiliary audio stream or a clip dubbed audio stream. For example, a dubbed audio stream corresponding to the first clip main stream linked to the first real play list is recorded as a second clip dubbed audio stream (Clip 2 Auxiliary Audio Stream). This second clip dubbed audio stream is managed for its recording and reproduction by a second real play list (Real PlayList 2). [0010] Also, the VDR system 3 of the above mentioned optical disc apparatus produces and records virtual play lists in order to allow the user to optionally select, edit, and play real play lists recorded and managed in the above mentioned procedure. As shown in FIG. 2, such a virtual play list, for example, a first virtual play list (Virtual PlayList 1) associated with the first real play list, may include a play item (PlayItem) for a main path adapted to read out and reproduce the first clip main A/V stream linked to the first real play list, and a sub play item (SubPlayItem) for a sub path adapted to read out and reproduce the second clip dubbed audio stream linked to the second real play list. [0011] Accordingly, the VDR system 3 of the optical disc apparatus can selectively reproduce the second clip dubbed audio stream managed by the second real play list at the request of the user during a reproducing operation thereof in which the first clip main A/V stream managed by the first real play list is read out and reproduced. Thus, the user can view the video image of the first clip main A/V stream and simultaneously listen to the audio sound of the second clip dubbed audio stream. [0012] In rewritable optical discs such as the above mentioned BD-RE, however, there is a limitation in that only one play item and only one sub play item can be recorded in a virtual play list produced and recorded in an editing procedure performed by the user. For this reason, only one dubbed audio stream can be additionally recorded and managed for each of clip main A/V streams sequentially recorded in the unit of clips. As a result, there is a problem in that it is impossible to record and manage several dubbed audio streams desired by the user and to link the dubbed audio streams to one clip main A/V stream. Nevertheless, there is no method capable of efficiently solving this problem. SUMMARY OF THE INVENTION [0013] Therefore, the present invention has been made in view of this and other limitations, and an object of the invention is to provide a method for managing additional recording and reproduction of a multi-dubbed audio stream for a clip-unit main A/V stream recorded on a storage medium such as a high-density rewritable optical disc. [0014] In accordance with one aspect, the present invention provides a method for managing recording of a multi-dubbed audio stream corresponding to a clip-unit main A/V stream, comprising the steps of: producing virtual play lists, the number of which corresponds to the number of dubbed audio streams desired by a user in association with the clip-unit main A/V stream, for reading and reproduction of the dubbed audio streams; and recording common link information, for reading and reproduction of the clip-unit main A/V stream, in the virtual play lists, while recording distinct link information, for reading and reproduction of the dubbed audio streams associated therewith, in the virtual play lists, respectively. [0015] In accordance with another aspect, the present invention provides a method for recording and managing a multi-dubbed audio stream, comprising the steps of: producing and recording a real play list and virtual playlists for reading and reproduction of a clip-unit main A/V stream and a plurality of dubbed audio streams associated with the clip-unit main A/V stream, respectively; and recording management information for searching for and reading out the real play list and the virtual play lists, in an `info.dvr` file included in a `VDR` directory having an order lower than a highest-order root directory in a file structure of a rewritable storage medium. [0016] In accordance with another aspect, the present invention provides a method for managing reproduction of a multi-dubbed audio stream, comprising the steps of: searching for and reading out play list management information about multiple dubbed audio streams, which is recorded in a file, other than play list files, provided in a file structure of a rewritable storage medium; and reading out and reproducing a main A/V stream and multiple dubbed audio streams respectively linked to play lists identified by referring to the play list management information. BRIEF DESCRIPTION OF THE DRAWINGS [0017] The above objects, and other features and advantages of the present invention will become more apparent after a reading of the following detailed description when taken in conjunction with the drawings, in which: [0018] FIG. 1 is a schematic view illustrating a part of the configuration of an optical disc apparatus such as a video disc recorder (VDR); [0019] FIG. 2 is a schematic diagram illustrating a linked condition between real play lists and virtual play lists in a rewritable optical disc, for example, a BD-RE; [0020] FIG. 3 is a schematic diagram illustrating a linked condition between real play lists and virtual play lists recorded and managed by a method for managing recording and reproduction of multi-dubbed audio stream in accordance with the present invention; and Continue reading about Information storage medium, information reproducing apparatus, and information reproducing method... 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