MXPA99007437A - Optical - Google Patents

Abstract

A recordable optical disc stores one or more video objects. A video stream, a first audio stream, and a second audio stream which is used for dubbing are multiplexed into each videoobject. Also, an optical disc recording apparatus generates the second audio stream by an audio stream generating means, and multiplexes the generated second audio stream into each video object together with the video object and the first audio stream by a multiplexing means. The generated video objects are recorded onto the recordable optical disc by a recording means. The optical disc in which such video objects are stored facilitates dubbing.

Description

TO í OPTICAL DISC, OPTICAL DISC RECORDING DEVICE AND METHOD OF < RECORDING OPTICAL DISC TO FACILIATE THE DOUBLE, STORAGE MEDIA TO STORE OPTICAL DISC RECORDING PROGRAM TO FACILITATE THE DOUBLE, OPTICAL DISC REPRODUCTION DEVICE, AND OPTICAL DISC REPRODUCTION METHOD FIELD OF THE INVENTION This invention relates generally to a rewritable optical disc, an optical disc recording apparatus, an optical disc recording method and a storage medium for storing an optical disc recording program, and Specifically, for a rewritable optical disc, an optical disc recording apparatus, and an optical disc recording method for facilitating dubbing and a storage medium for storing an optical disc recording program for facilitate dubbing BACKGROUND OF THE INVENTION Recently, the DVD has been commercialized (Digital Video / Versatile Disk) -RAM, one of the REF. 30880 rewritable optical discs. The DVD-RAM is a disk of the type of phase change, having a capacity of several gigabytes. Now that MPEG and MPEG2, which are standards for compressing / encoding AV (Audiovisual) data, have been put to practical use, it is expected that DVD-RAM will be used not only in computers, but also as a recording / AV media. reproduction. That is, the general expectation is that the DVD-RAM will be will prevail and replace the magnetic tape that has been a major means of AV recording / playback. It is possible for users to burn data to DVD-RAM while this is not possible on read-only DVDs (referred to later as DVD-ROMs) As a result, DVD-RAM is expected to provide a wide range of uses. However, it is not as simple to execute a dubbing on conventional optical discs as it would be on magnetic tapes. 20 Magnetic tapes have separate areas for recording video tracks and audio tracks. Also, the video information and the 'fr-- audio information are read / written to / from magnetic tapes via magnetic heads ¥ respectively independent. Therefore, it is very easy to execute a dubbing of audio information on the magnetic tapes. In the case of analog video tape recorders, the time (delay) that is taken to start playing audio or video information read from the magnetic tape by means of the head is almost zero. This is the same for the time (delay) to start writing audio or video input information, towards the magnetic head by means of the head. As a result, the information or data can be recorded on the magnetic tape at the same time that the information or data that has been recorded on the magnetic tape is reproduced. In contrast, in the case of a disc Optical, the video current and the audio stream are multiplexed in an MPEG stream to be recorded on the disc. Also, only a single reader head is used to both record and read information from / to the optical disk. In the MPEG stream, the video stream is placed in front of and processed before the audio stream. This is because the amount of information or video data to be decoded is greater than the audio information. Such an information structure of the MPEG stream and the for dubbing it is recorded in advance in the video objects. It is also possible to record the dubbing audio information together with the original audio information (the first audio, audio) since the first and second audio streams are recorded separately. ,,, As a result, it is possible to achieve new applications (that is, applications to practice the pronunciation of some language and applications including dubbing for Karaoke) that have not been conventionally achieved in conventional recordable discs. It is also possible to record dubbing repeatedly while maintaining the original audio information. On the recordable optical disc mentioned above, the second audio stream for dubbing can have the same playing time period as that of the first audio stream. With such construction, it is possible to ensure that the first audio stream is doubled in the second audio stream over the entire reproduction period. In the recordable optical disc mentioned above, the second video stream for the change the first and second audio streams - H during playback. In the recordable optical disc mentioned above, the first audio stream may include a plurality of packets which each Jr one has a predetermined size, and the second audio stream may include a plurality of packets corresponding respectively to the plurality of packets included in the first 10 audio stream. Also, on the recordable optical disc 3 above, each of the plurality of packets in the second audio stream may include the same audio information as that included in the plurality of corresponding packets of the first audio stream. With such construction, the second audio stream for dubbing corresponds to the first audio stream in packet units and has the same audio information. As a result, in addition to the description of the partial dubbing above, it is possible to return the second audio stream to the state before its dubbing. This is achieved by copying the audio information from the packages of Administration information may also indicate one of a first state, a second state and a third state, wherein the first state indicates that the second audio stream includes the same audio information that the first stream of ^ audio, the second state indicates that the second audio stream includes audio information that has been generated from the same source as the * first audio stream, and the third state 5 indicates that the audio information of the second audio stream is irrelevant to the audio information of the first audio stream. With such construction, it is possible for the recording apparatus and the reproduction apparatus. handle the state of the dubbing stream referring to the administration information. The above object is also fulfilled by a recordable optical disk comprising: an area of information or data, in which one is recorded or more video objects, wherein a plurality of elementary streams are multiplexed into one or more video objects, wherein one of the pluralities of elementary streams is a video stream 4 and another is a dubbing stream that is used to the dubbing of either audio and information information or sub-picture data; and an area of -te administration to store one or more pieces of administration information corresponding respectively to one or more video objects, each one of the pieces of information from ? > A part of the video stream corresponds to at least one frozen image, and each of the pieces of administration information indicates whether the dubbing has taken place in the doubling stream of the corresponding video object. Also, in the recordable optical disc mentioned above, the part of the dubbing stream included in each video object unit may correspond to a frozen image having a predetermined size. With the construction mentioned above, it is possible to easily fold at least one frozen image to each video object unit. The object mentioned above is also fulfilled by means of an optical disc recording apparatus for recording one or more video objects to an optical disk, wherein each or more of the video objects includes a video stream, a A first audio stream and a second current • > ? audio, and the optical disc recording apparatus comprising: an input unit for receiving the video stream and the first audio stream; an audio stream generating unit for generate, based on the first audio stream i video of the optical disc; a first buffer unit including a first read buffer and a first memory -i intermediate write, the first reading buffer saving a part of the video object read, and the first write buffer saving a part of the read video object to be written to the optical disk; a second buffer unit including a second reading buffer and a second write buffer, the second read memory I-- intermediate stores a part of the read video object and the second write buffer storing a part of the video object read that has to be written on the optical disc; Y ** a dubbing control unit to perform a control so that while the video object is either read and write to / from the *. optical disk using one of the first units * and * 20 a. of buffer memory or the second memory unit 4 intermediate, the second audio stream in the part of the video object stored in the reading buffer of the other first j buffer unit and the second memory unit intermediate is updated, and the part of the object of OR. video including the second audio stream ? updated is stored in the write buffer of the other buffer unit, where the read / write unit writes to m? sequence the part of the video object in the first write buffer and the part of the video object in the second write buffer to the optical disk, where after the second audio stream is executed by doubling, the control unit dubbing is capable of restoring the second audio stream to a state before dubbing by copying the audio information from the first audio stream to the second audio stream. With the construction mentioned above, the dubbing control unit alternately changes the first and second buffer units to read / write the optical disc or to execute the dubbing (update the % 20 second audio stream). This achieves the reproduction and dubbing carried out in time ; real. Also, the second audio stream can be easily re-established to its original state after dubbing is performed on the second audio stream.

In the aforementioned optical disk recording apparatus, the dubbing control unit can instruct the read / write unit to read an administration information piece corresponding to the video object read by the read / write unit, updates the read piece of administration information so that the information indicates that the dubbing has been performed on the video object, and gives instructions to the writing / reading unit that writes the updated piece of administration information to the optical disk. With the construction mentioned above, it is possible to update the information of administration to indicate that the dubbing has been performed on the folded video object. The aforementioned object is also fulfilled by means of an optical disc recording apparatus for recording one or more video objects 0 to an optical disk, wherein each or more of the video objects include a video stream, the apparatus optical disc recording comprises: a unit of. input to receive the video stream; a doubling current generating unit 5 for generating a doubling current that is used for dubbing; a multiplexing unit for generating the video object (s) by ultiplexing the doubling current generated and the video current received in one or more video objects; 5 management information generating unit to generate one or more pieces of information from? administration that correspond respectively to one or more video objects, each or more of the pieces of management information indicates whether the dubbing has been carried out in the dubbing stream in the corresponding video object; and a recording unit to record one or more objects of -? * "71. video and the management information piece (s) generated to the optical disk 15 With the construction mentioned above, the disk recording apparatus Optical 1 multiplexes the dubbing stream in the video objects beforehand during the first ¥ recording to the optical disc. As a result, it is It is possible to generate an optical disk in which the video objects that facilitate the dubbing of audio information or sub-agent information are recorded in advance. Furthermore, it is possible for the recording apparatus and the reproduction apparatus to handle if the dubbing current has been carried out. " Doubling referring to administration information. The aforementioned object is also fulfilled by a method for recording one or more video objects to an optical disc, the method comprising: a obtaining step for obtaining a video stream and a first audio stream; an audio stream generating step for generating a second audio stream having a bit proportion with which the audio information corresponding to a reproduction time period of the first audio stream is recorded in the second audio stream; and a recording step for generating one or more video objects to multiplex the second generated audio stream, the obtained video stream, and the first audio stream obtained in one or more video objects and recording the one or more objects of the video. video generated on the optical disc. 20 With the aforementioned construction Ct 'previously, the second video stream for dubbing multiplexes to the video objects of * * • »i - beforehand during the first recording to the disc ? »Optical. As a result, it is possible to generate an optical disk 25 in which the video objects that facilitate .the dubbing are recorded in advance. It is also possible to record the dubbing information or audio data together with the information of the original audio (the first audio stream) since the first and 5 second audio streams are recorded separately. The aforementioned object is also fulfilled by a computer-readable storage medium storing a program for recording one or more video objects to an optical disc, the program comprised of: a program segment for instructing a computer of receive a video stream and a first audio stream; a segment of a program that instructions to the computer to generate a second audio stream having a proportion of bits in which the audio information corresponding to a certain period of time of "I playback of the first audio stream is record in the second audio stream; segment of a program that instructs the computer to generate the video object (s) by multiplexing the second generated audio stream, the received video stream, and the first audio stream received to one or more video objects; and a segment • f f of a program to instruct the computer to record the video object (s) generated on the optical disc. x. With the mentioned construction t *? 5 above, a computer running the program stored in the storage medium multiplexes the second audio stream for its dubbing to the video objects in advance, during its first recording on the optical disc. As a result, it is possible to generate an optical disc in which the video objects that facilitate dubbing are recorded in advance. It is also possible to record the dubbing audio information next to the original audio information (the first audio stream) since the first and second audio streams are recorded separately. In the computer-readable storage medium mentioned above, the second generated audio stream may have the same information or audio data that the first audio stream. Also, in the computer readable storage medium mentioned above, the first audio stream received may include packages that each have a fixed size, and the segment of the audio stream generator program can give instructions to the. computer for temporarily storing packages included in the first received audio stream to a buffer in sequence, and instructing the computer to perform a control so that the packets stored in the buffer are output and included in the second audio stream. ^ * 10 Also, in the computer readable storage medium mentioned above, each packet can include a timestamp and a stream identifier, the timestamp specifying a time when each packet is output from a track buffer of a player, and the program generator segment of the time stream gives instructions i to the computer to update timestamps and stream identifiers of the packets 20 stored in the buffer. With the construction mentioned above, it is possible for the computer to % is running the program stored in the storage medium that generates the second stream of J- ás video objects, wherein the second video stream has a proportion of bits in which the audio fe information corresponding to a period of time of reproduction of the first video stream is recorded to the second audio stream, of each or more pieces of administration information further indicates a first state, a second state, a third state, and a fourth state, _ wherein the first state indicates that a second stream of 4 audio includes the same information or audio data as that of the first audio stream, the second state indicates that the second video stream includes audio information that has been generated from the same source as the first audio stream, the third state indicates that the audio information of the second audio stream is irrelevant to 1 information or audio data of the first audio stream, and the fourth state indicates that the second audio stream has been carried out by bending, the optical disc player apparatus comprising: a reading unit for reading a video object and a piece of administration information corresponding to the video object of the optical disk; 25 a reproduction unit for reproducing the f- < 4- 24 video stream and the first audio stream included in the video reading object; a control unit for controlling the reproduction unit so that when the administration information piece indicates that the fourth state, the reproduction unit is allowed to change the reproductions of the first audio stream and the second audio stream in accordance with an instruction to change the input of currents of audio of a user, and that when the piece of management information indicates either of the * 1 first state and the second state, the reproduction unit is not allowed to change reproductions of the first audio stream and the second one " 15 '^ l audio stream even when the information is "i 'input from the user and the playback unit notify the user that the audio streams can not be changed r I With the mentioned construction above, the control unit controls the * 1 reproduction unit so that when the optical disc has been executed by dubbing (third state), the reproduction unit changes the reproductions of the first audio stream and the second one. audio stream in accordance with an a * * aj administration area for storing one or more pieces of administration information corresponding respectively to the video object (s), wherein the second audio stream has a proportion of bits with the that the audio information at a period of time of reproduction of the first audio stream is recorded in the second audio stream, wherein one or more pieces of administration information also indicate one of a first state, a second state, a third state, and a fourth state, wherein the first state indicates that the second audio stream includes the same audio information as the first audio stream, the second state indicates that the The second audio stream includes audio information that has been generated from the same source as the first audio stream, the third state indicates f * that the audio information of the second audio stream is irrelevant to the audio information of the audio stream. the first audio stream, and the fourth state indicates that the second audio stream has been carried out by doubling, the optical disk reproduction method comprising a reading step to read a video object and a piece of administration information corresponding to the video object of the optical disk; one step -f- reproduction to reproduce the video stream and the first audio stream included in the video reading object; a control step so that, when the management information piece indicates the fourth state, allowing the reproduction step to change reproductions of the first audio stream and the second audio stream in accordance with an instruction for change the input audio streams by a user, and that when the piece of management information indicates either the first state and the second state, do not allow the step that the playback step changes reproductions of the first audio stream and the second audio stream even when it is an input instruction by a user, and that the playback step notifies the user that the audio streams can not be changed. With the aforementioned construction, the method of optical disc reproduction prevents the user that the audio streams can not be changed since the dubbing has not been carried out. The user is notified of it for the following reason. If the first audio stream is changed to the second audio stream when the dubbing has not been carried out on the optical disc (first or second state), the user may misinterpret the operation thinking that the reproduction apparatus has broken down and has failed to change the audio streams since the user will hear the same sound.

BRIEF DESCRIPTION OF THE DRAWINGS 10 •! - FIG. 1 shows the appearance and recording area of a DVD-RAM disc which is a "recordable optical disc described as an embodiment of the present invention." V 15% r FIG 2 shows a cross section and the surface of a cut of a DVD-RAM in the • t. heading of a sector.

FIG. 3A shows the plurality of areas of the area provided in a DVD-RAM.

-, * FIG. 3B shows a horizontal arrangement of the entrance area, of the exit area, and area 25 of zone 0-23 that were shown in Figure 3A.

FIG. 3C shows logical sector numbers (LSNs) in the volume area. '* - 5 FIG. 3D shows logical block numbers (LBNs) in the volume area. 1 ii FIG. 4 shows a hierarchical relationship between zone areas, ECC blocks, and sectors. 10 FIG. 5 shows directories and information or AV data and non-AV information or data recorded on a DVD-RAM disc.

FIG. 6A shows the VOBs that are recorded as AV information or data files "Moviel.VOB" and "Movie2.VOB".

FIG. 6B shows a structure of VOB in that the elementary streams are multiplexed.

FIG. 7 shows borders generated in audio stream # 1 when a partial dubbing takes place in audio stream # 1. 25 FIG. 8 shows an information format of the video package.

FIG. 9 shows an information format of the video package (MPEG audio).

FIG. 10 shows an information format of the audio packet (AC-3).

FIG. 11 shows an information format of the audio packet (linear PCM).

FIG. 12 shows graphically the information structure of the AV administration information file 15.

FIG. 13 shows the relationship between "Cell Start Time", "Play Time I of Cell "," Cell Start Address ", 20" Cell End Address "," VOB Address Start% HL "," VOB End Address "and the -t VOB.

FIG. 14 shows a relationship between several pieces of information that are indicated by respective values of the "Application Mark" of the "Audiol Attribute" in a VOBI.

FIG. 15 shows the construction of a system example using the optical disc recorder / player apparatus of the present embodiment.

FIG. 16 is a block diagram 10 showing the construction of the 10 DVD recorder.

FIG. 17 shows a remote controller.

FIG. 18 is a block diagram "Fig. 15 showing the construction of an MPEG decoder 4 shown in Fig. 16.

FIG. 19 is a block diagram showing the construction of an MPEG decoder 2 shown in FIG. 16 FIG. 20 shows the operation executed A during the dubbing process.

FIG. 21 shows the construction of the disk access unit 3. T FIG. 22 is a flow chart 5 showing the process of generating video and audio stream packets # 0 that are carried out by the encoder system 2e.

FIG. 23 is a flow chart 10 showing the process of generating audio packets from audio stream # 1 for dubbing.

FIG. 24 is a flow diagram of the multiplexing process in which the encoder of system 2e multiplexes the video stream and the audio streams # 0 and # 1 in packet units.

FIG. 25 shows the output of VOBs of the system encoder 2e. 20 * FIG. 26 shows the day simulation? video decoder buffer.

FIG. 27 shows the dubbing process 25 with the timing when the access unit of i: disk 3 performs read / write, and with timing when encoder 2 MPEG re-writes audio stream # 1.

FIG. 28 shows a VOB that is read and written during the time periods shown in FIG. 27 FIG. 29 shows the control of the 3d and 3e changes shown in FIG. 21 executed by the control unit 1 with the timing shown in FIG. 27 FIG. 30 shows the construction of the MPEG encoder including two pairs of an audio encoder and an audio buffer.

FIG. 31 shows a structure of the VOB in the second mode in which the elementary streams are multiplexed.

FIG. 32 shows a data format of the subframe pack FIG. 33 hierarchically displays the information structure of the AV administration information file.

FIG. 34 is a block diagram showing the construction of the MPEG encoder 12.

FIG. 35 is a block diagram showing the construction of the MPEG decoder 14.

DESCRIPTION OF THE PREFERRED MODALITIES < First Mode > < 1 Optical Disc Construction > < 1-1 Physical Structure of the Recordable Optical Disc > FIG. 1 shows the appearance of the recording area of a DVD-RAM disc which is a recordable optical disc described as an embodiment of the present invention. As shown in the figure, the DVD-RAM disk has an entry area at its innermost periphery and an output area at its outermost periphery, with the information area in between. The input area records the necessary reference signals for the stabilization of a servo of a recording / reproducing apparatus and also records identification signals used to prevent confusion with other means. The output area records the same type of reference signals as those of the input area. 5 The data area, meanwhile, is divided into sectors that are the smallest unit through which you can access the DVD-RAM. Here the size of each sector is set to 2KB. The information recorded in the information or data area includes management information on AV file, information or data systems, AV administration information files, and non-AV information or data. The information file system of administration includes a directory structure i of the DVD-RAM disc, positions of the recorded files, and information about the status of the 4 subject of the data area. The management information file system is used when i-Je, 20 files are created, written, read or deleted. - "fe- AV information is recorded in units of $ files that correspond respectively to Video Objects (VOB). Each VOB is recorded on the disc by means of an optical disc recording device in consecutive recording. For example, the contents > • VOBs are a total or part of a movie, or a total or part of a television program. The non-AV information or data is information different from the AV information and is recorded in file units. FIG. 2 shows the cross section and surface of a cut of a DVD-RAM in the header of a sector. As shown in the figure, each sector consists of a sequence of holes that is formed on the surface of a reflective film, such as a metal film, and an uneven part. The gap sequence consists of holes of 0.4μm ~ 1.87μm which are recorded on the surface of the DVD-RAM to show the direction of the sector. The uneven part consists of a concave part called "notch" and a convex part called "earth". Each notch and ground has a recording mark composed of a metal film capable of phase change linked to its surface. Here, the expression "capable of phase change" means that the recording mark may be in a crystalline state or in a non-crystalline state depending on whether the metallic film has been exposed to a beam of light. Using this phase change feature, the information can be recorded in this unequal part. While it is only possible to record information on the ground part of a MO (Optical Magnetic) disc, information can be recorded on both the ground and notch sides of the DVD-RAM, meaning that the recording density of a DVD -RAM exceeds that of an MO disk. The error correction process is carried out for each group of 16 sectors. In this modality, each group of 16 sectors that is given an ECC (Error Correction Code) is called an ECC block. In a DVD-RAM, the data area is divided into a plurality of area areas so that the recording / reproducing apparatus can perform a rotation control called Z-CLV (Constant Zone Linear Velocity) during recording and playback. FIG. 3A shows the plurality of areas of areas provided in a DVD-RAM. As shown in the figure, a DVD-RAM is divided into 24 zones zones numbered zone 0 to zone 23. Each zone area is a group of tracks that are accessed using the same angular velocity. In this mode, each area area contains 1888 tracks. The angular rotation speed of the DVD-RAM is set separately for each area area, this speed being higher the closer a zone of area is located towards the internal periphery of the disk. This ensures that the reading head of the optical disk can move at a constant speed while carrying out the access within a single area area. By doing this the recording density of the DVD-RAM is increased, and rotation control is facilitated during recording and playback. FIG. 3B shows a horizontal arrangement of the entrance area, the exit area, and the area area 0-23 that were shown in FIG. 3A. The entrance area and the exit area each have a DMA inside (Defect Management area). The DMA records: position information showing the positions of sectors found to include defects; Position replacement information showing the positions of the sectors replacing the defective sectors located in a replacement area. Each area area has a user area inside, the replacement area and an unused area are provided in the boundaries between areas of areas. The user area is an area that can be used by the file system as a recording area. The replacement area is used to replace defective sectors when such 5 defective sectors are found. The area without ¥ use is an area that is not used to record information. Approximately only two tracks are assigned as the unused area, with such an area without To p use being provided to prevent a erroneous identification of sector addresses. This is because while sector addresses are recorded in the same position on adjacent tracks within the same zone, for Z-CLV the sector addresses are recorded in different positions on adjacent tracks at the limit of the area. In this way, the sectors that are not used for the recording of information exist in the boundaries between zones of areas. By Consequently, in a DVD-RAM, the logical sectors numbers (LSN: Logical Sector Number) are assigned to physical sectors of the user area in order starting from the internal periphery to consecutively show only the used sectors to record information.

As shown in FIG. 3C, the area that records user information and that is composed of sectors to which LSNs have been assigned is called the volume area. Also, as shown in FIG. 3D, in the most internal and external periphery of the volume area, the information of the volume structure is recorded to be used to deal with the disk as a logical volume. The rest of the volume area except the areas for recording the volume structure information is called the partition area. The partition area is used to record files. Logical block numbers (LBN: Logical Block Number) are assigned to sectors of the partition area in order starting from the first sector. Here and then the logical block number is also called sector address. FIG. 4 shows a hierarchical relationship between area areas, ECC blocks, and sectors. As shown in the drawing, each area area includes a plurality of ECC blocks. It is desirable for recording devices that in the optical discs, the areas in sectors units are assigned to non-AV information or data, while areas in units of consecutive recording areas ensure an uninterrupted reproduction of the AV information or data. Here, each consecutive recording area is composed of consecutive sectors in units of ECC blocks (in other words, each area is an integral multiple of an ECC block) and has a predetermined size (approximately 7MB) or more, each consecutive recording area. not exceeding the boundary between zones. However, when the AV data or information includes a plurality of extensions, the last extension may be smaller than the predetermined size. The reason why it is defined that each consecutive recording area does not exceed the limit between zones is that an overshoot in "the limit will change the angular speed of rotation of the optical disc, which will interfere in the uninterrupted reproduction. each consecutive recording area is an integral multiple of an ECC block is that the ECC block is the minimum unit treated during the ECC process. <l-2 AB File (VOB) and AV management information or data file> FIG 5 shows directories, AV information and non-AV information or data recorded on a DVD-RAM disc.

- * In the drawing, the ellipses represent directories and the rectangles represent files. The "ROOT" directory includes an "RTR" directory and two non-AV information files: 5"Archivol.DAT" and "File2.DAT". The "RTRW" directory includes an AV management information or information file "RTRW.IFO" and a plurality of AV information files: "Movie.VOB" "Movie2.VOB" ... Each AV file represents a VOB. 10 The AV management information file is a file to record information used to handle AV files recorded in the current directory «3 > * ("RTRW") or on the optical disc. < l-2-l VOB Data Structure > 15 As shown in FIG. 6A AV information files: "Movie.VOB" "Movie2.VOB" ... It was' f. V each record in the VOB information area. FIG. 6B shows a VOB structure in which elementary elements (video streams and audio streams) are multiplexed. As shown in the drawing, VOB 70 includes a video stream 72, audio stream 73, and audio stream 74. Audio stream 74 is used for dubbing. It is desirable that the audio stream 74, which is dedicated to dubbing, has the same bit rate as the audio stream 73. However, there will be no problem if the audio stream 74 includes an area in which the audio information with the same period of time that the audio stream 73 can be recorded, even if the audio stream 74 has a different bit proportion of the audio stream 73. The video stream 72 is a compressed data stream with a bit-length ratio variable, encoded in complicity with the MPEG2 standard. The video stream 72 includes a plurality of GOPs (Group of Frames) each of which includes a plurality of frames. For example, as shown in the drawing, the video frames 71 include compressed / encoded frames that are either I (Intra) -image, P (Predictive) -image, and B (Bidirectionally Predictive) -image defined in the standard MPEG2. Also, as indicated by the GOP 71a in FIG. 6B, each GOP includes at least one I-image and is a video information section corresponding to a reproduction time period of approximately 0.5 seconds. This indicates that independent playback is possible in units of approximately 0.5 seconds. It should be noted that the video frames 71 in the drawing are shown in order of decoding, and not in the order of display. The audio stream (# 0) 73 is audio information that must be reproduced simultaneously with the video stream. On DVD-RAM any of the three types of mode: MPEG audio, AC-3, and linear PCM can be used to encode audio streams. With MPEG or AC-3 audio, .the audio information is compressed; with linear PCM, the audio information is not compressed. The audio stream (# 0) 73 is encoded with any of the three encoding modes. The audio stream (# 1) 74 is an audio stream for dubbing and has the same playback time period as the audio stream (# 0) 73. It is presumed that the audio streams # 0 and # 1 that are show in the drawing have the same coding mode, the same proportion of bits, and the same audio information. The VOB 70 is composed of an F plurality of Units of Video Objects (VOBUs) arranged in the order of reproduction: VOBU 75a, VOBU 75b, 75c, ... Each VOBU includes video information corresponding to a GOP. Each VOBU includes packets that belong respectively to the elementary streams. Each packet has a fixed extension (2KB) and includes information or data that is part of an elementary stream. The video packets (V_PCK 72a, V_PCK 72b, ...) each include information or data that is part of the video stream 72. The audio packets (A0_PCK 73a, A0_PCK 73b, ...) include each information which is part of the audio stream 73. The audio packets (A1_PCK 74a, A1_PCK 74b, ...) each include information or data that is part of the audio stream 74. In the present embodiment, the audio stream # 1 has the same coding mode, the same proportion of bits, and the same information audio that audio stream # 0 when audio stream # 1 is first recorded on the disc. Therefore, audio streams # 0 and # 1 have the same number of packets. The audio stream # 1 is multiplexed as well as the audio stream # 0 to ensure an area in which the audio information for dubbing can be recorded. The statement mentioned above is explained more specifically. It is desired that the audio stream (# 1) 74 have the same proportion of bits and the same encoding mode as the audio stream # 0. This is because, with the same proportion of bits and the same encoding mode, the optical disc recording device can generate the audio currents # 1 to bend without difficulty when copying the output of an audio encoder (the audio stream # 0). This ensures that current # 1 has the same audio quality as audio stream # 0. Alternatively, audio stream # 1 may have a bit rate different from that of audio stream # 0. In this case, the same audio quality as that of audio stream # 0 can not be ensured for audio stream # 1. As a result, the optical disc player apparatus may include two audio encoders so that the audio stream # 1 can store the audio information having the same source as that of the audio stream # 0. In any case, audio stream # 1 for dubbing needs to include an area in which the audio information with a same period of time as audio stream # 0 can be recorded. With this arrangement, it is possible to ensure the ease of dubbing to audio stream # 1 although the audio streams # 0 and # 1 may be different in audio quality due to the difference in bit rate or encoding mode. In addition, it is desirable that audio streams # 0 and # 1 have the same content of audio information whether they have the same or different coding mode. The reason for this is as follows. DVD recorders or playback devices have an audio decoder. This makes it impossible for such an apparatus to simultaneously play audio streams # 0 and # 1. As shown in FIG. 7, the decoder should be instructed to change the audio currents of the playback target at the boundaries between audio streams # 0 and # 1 (in both directions) when audio stream # 1 is partially bent. In general, it is difficult to accurately change the audio currents in the limits since an audio stream of the reproduction target is specified by an organizing side, that is, under the control of a microcomputer. Under such condition, it is impossible to ensure an uninterrupted reproduction. Accordingly, it is arranged for audio stream # 1 to record the same audio information content as audio stream # 0. This eliminates the need to change audio streams in the limits in partial doubles, allowing an uninterrupted reproduction in the limits. FIG. 8 shows an information format in the package or video package. FIG. 9-11 show information formats of packets or audio packets. On the DVD-RAM, each package or package includes a group. The package or package consists of a package header and a group. The package has a fixed size of 2KB, which is the same as the sector size in the DVD-RAM. The packet or package header includes a packet start code, a System Reference Clock (SCR), and other information. The SCR is a kind of timestamp and indicates the time at which the current packet passes through a multiplexer of the reproductive system. Here, the packages or packages that are read from the DVD-RAM by means of the reproducing apparatus are separated into packages or audio and video packages by means of the demultiplexer. The video information or audio information of each packet is stored in the video buffer or in the audio buffer, and is decompressed (extended) by means of the video decoder or the audio decoder. Each group includes a group header and a payload field. The group header includes a group start code, a current ID, a DTS, a PTS and other information. The current ID is an identifier indicating an elementary stream that includes the current packet. The DTS (Decoded Time Stamp) is a kind of timestamp and indicates the time at which the video image information or the audio frame information is transferred from the video buffer or audio buffer towards a video decoder or an audio decoder. The DTS is not linked (omitted in) in the audio streams since the audio streams are decoded and presented at the same time. The PTS (Presentation Time Mark) is a type of time stamp indicating a time when the decoded video information or the decoded audio information is displayed / output.

In the present embodiment, the current ID of the video stream is "1110 0000" as shown in FIG. 8. The current ID of the audio stream encoded with MPEG 5 audio is "1100 0000" (in the case of audio stream -? # 0) or "1100 0001" (in the case of audio stream # 1), as shown in FIG. 9. As shown in FIGS. 10 and 11, the current ID of the audio streams encoded with the AC-3 or the Linear PCM is "1011 1101" which is equivalent to private stream 1 defined in MPEG2. In addition, any of AC-3 and linear PCM, and any of audio stream # 0 and audio stream # 1 are identified by the sub-current ID included in the group payload. The packets or audio packets of the AC-3 or linear PCM include a subcurrent ID following the group header. As shown in FIG. 10, the subcomponent ID of the stream of audio encoded with AC-3 is "1000 0000" (in the case of audio stream # 0) or "1000 0001" (in the case of audio stream # 1). As shown in FIG. 11, the undercurrent ID of the audio stream encoded with the linear PCM is "1010 0000" (in the case of audio stream # 0) or "1010 0001" (in the case of audio stream # 1) . As described above, an elementary stream in which the current packet or packet is included is identified by means of the current ID and the substream ID. < l-2-2 AV Management Information File > FIG. 12 hierarchically shows the information structure of the administration information file. As shown in the first layer of the drawing, the administration information file AV includes a VOB information table (VOBI) and a PGC administration information table (PGCI). < l-2-2-l VOBI Table > The VOBI table will be explained first. As shown in the second layer eri FIG. 12, the VOBI table includes information entitled "VOBS number," "VOBI # 1," ... "VOBI #N." The "VOB number" indicates the number of VOBs recorded on the DVD-RAM disc (in the example present, the number is N). The "VOBITTI," ... "VOBI # N" are information of respective VOBs recorded on the DVD-RAM disc.

As shown in the third layer of FIG. 12, each VOBI ("V0BI # 1," ... "VOBI #N") includes information titled "AV File Name", "VOB ID", "VOB Start Address", "VOB End Address", " VOB Playtime ", and" VOB Attribute ". The "VOB ID" is an identifier of the VOB. The "VOB Start Address" and "VOB End Address" are represented by sector addresses. As shown in the fourth layer of the FIG. 12, each "VOB Attribute" includes "Video Attribute", "AudioO Attribute" and "Audiol Attribute". The "Video Attribute" shows the resolution and proportion aspect (ratio of the vertical length to the horizontal length of the screen) of the video image in the video stream. As shown in the fifth layer of FIG. 12, each of the "AudioO Attribute" and "Audiol Attribute" includes information titled "Coding Mode", "Application Indicator" "Quantification", "Fs", and "Number of Channels". The "Coding Mode" shows a coding mode that is any of the MPEG audio, AC-3, and linear PCM. The "Application Indicator" shows the contents of the video stream. "Quantification" includes information related to quantification, such as the quantification coefficient. The "Fs" show a sampling frequency. The "Number of Channels" indicates the number of channels included in the audio stream. The "Application Indicator" of the "Audiol Attribute" has at least two bits. The value of the "Application Indicator" indicates any of the "same audio information", "almost same audio information", "dubbing information or audio data" and "personalized audio information or data". The "same audio data" indicates that the audio information of the audio stream # 1 is a copy of the audio information of the audio stream # 0. This means that the audio stream # 1 and the audio stream # 0 are the same in all respects, that is, in each encoding mode, in the proportion of bits, and in the audio information for each packet. That is, all packets or packets included in audio stream # 1 in a VOB correspond to packets or packets included in audio stream # 0 on a one-to-one basis. Also each packet or packet in audio stream # 1 has the same audio information as the audio information included in the corresponding packet in audio stream # 0. The "almost the same information or audio data" indicates that the audio information of the audio stream # 1 is not a copy of the audio information of the audio stream # 0, but that the source is the same. The "dubbing information or audio data" indicates that the audio information or data of audio stream # 1 is a dubbing. In this case, the value of the "Application Indicator" can indicate any of the "same audio data or information", "almost the same audio information", and customized audio information before the dubbing is performed. The "personalized audio information or data" indicates that the audio information of the audio stream # 1 is irrelevant to that of the audio stream # 0. For example, the information indicates this when the audio information of the audio stream # 1 is unfathomable information or audio information that is totally different from that of the audio stream # 0. It should be noted here that in the present modality, the values prepared for the "Application Indicator" of the "AudioO Attribute" are the same as those of the "Audiol Attribute". However, the values of the "Application Indicators" of the "AudioO Attribute" and "Audiol Attribute" will not necessarily be the same. The values can always be set in "personalized audio information" or they may be different. <; l-2-2-2- Table PGCI > Now, the PGCI table will be explained. As shown in the second layer of the FIG. 12, the PGCI table includes information entitled "PGC Numbers" "PGCI # 1" ... "PGCI # M". The "PGC Numbers" indicates the number of PGCs recorded on the DVD-RAM (in the present example, the number is M). Here, a "PGC" is a logically linked sequence of arbitrary sections in the arbitrary VOBs containing AV information, or is a recording path of the logically linked sequence of AV information. Also, the "PGC information" is information that indicates the relationship of the logical union (reproduction path) between arbitrary sections in arbitrary VOBs. When a recent VOB is recorded, a PGCI of a PGC that is a simple sequence of sections in the VOB in order is added to the PGCI table. The PGCI can be defined (edited) by the user as a logically linked sequence of arbitrary sections in arbitrary VOBs containing AV information, or is a recording path of the logically linked sequence of AV information. As shown in the third layer of FIG. 12, each PGCI ("PGCI # 1 ... PGCI # M") includes information entitled "Number of Cells" and "Cell 1", ... "Cell J". Here, a "Cell" is an arbitrary section in an arbitrary VOB that can be specified by the user. Now, suppose that the "Number of Cells" in PGCI # M is J, then PGCI # M indicates a logical sequence of sections containing AV information shown by "Cell l" ... "Cell J". As shown in the fourth layer, in FIG. 12, each of the "Cell l" ... "Cell J" includes information titled "VOB ID", "Cell Start Time", "Cell Play Time", "Cell Start Address", " Cell End Address "e" Audio Indicator ". The pair of "Cell Start Time" C_ST) and "Cell Play Time" C_PT) specify a section (one cell) in the VOB specified by the "VOB ID". As shown in FIG. 13, the "Cell Start Time" C_ST) indicates the beginning of the section using a PTS in the VOB. The end of the section is obtained by adding the C_PT to the C_ST. The pair of "Cell Start Address" and the "Cell End Address" specify a section (one cell) in the VOB specified by the "VOB ID". As shown in FIG. 13, the "Cell Start Address" C_SA) and "Cell End Address" C_EA) are within a range of the "VOB Address of Home "(V_SA) to the" VOB End Address " (V_EA). When a VOB has just been recorded, a PGCI of a PGC that is a cell including all sections of the VOB is added to the PGCI table. The "Audio Indicator" specifies an audio stream that should be reproduced when the cell is played. That is, the "Audio Indicator" indicates audio stream # 0 when the indicator has a value "0", and indicates audio stream # 1 when the mark has a value "1". In the present embodiment, a cell is a section in a VOB specified by a pair of a C_ST and a C_PT and a pair of a C_SA and a C_EA, as shown in FIG. 13. However, a cell can be a section in a VOB specified by any of the pairs of a C_ST and a C_PT and the pair of a C__SA and a C_EA. < l-2-2-3 Application Indicator > FIG. 14 shows a relationship between several pieces of information indicated by respective values of the "Application Indicator" of the "Audiol Attribute" in a VOBI shown in FIG. 12. As shown in the solid lines of the drawing, a partial or full dubbing can be carried out in audio stream # 1 when the "Application Indicator" is the "same audio information" or "almost the same information of audio ". After the dubbing is complete, the "Application Indicator" changes to a value indicating "dubbing information or audio data". It is possible to consider "dubbing information or audio data" as "personalized audio information or data". As shown in the dotted lines of FIG. 14, when the original request indicator of audio stream # 1 is the "same information or audio data" this is, audio information or data of audio stream # 0 is copied to audio stream # 1 when audio stream # 1 is first recorded to the disc, audio information of audio stream # 0 may be copied to audio stream # 1. Even after dubbing it is done in audio stream # 1. After this is done, the request indicator of audio stream # 1 again indicates "same information of audio". It is possible to perform a full dubbing in audio stream # 1 even if the application indicator indicates "personalized audio information or data". After the dubbing has been carried out, the application indicator indicates "dubbing information or audio data". < 2 Optical Disk Recorder / Player Apparatus > The optical disc recorder / player apparatus of the present embodiment is described below with reference to the drawings. < 2-l System That Uses Optical Disc Player / Recorder Apparatus > FIG. 15 shows the construction of a system of examples using the optical disc recorder / player apparatus of the present embodiment.

The system includes an optical disc recorder / player apparatus 10 (here and then DVD recorder 10), a remote controller 6 for operating the DVD recorder 10, an antenna 11 and a display 12, wherein the antenna 11 and the display 12 are connected to the DVD recorder 10. After the DVD-RAM disc, which is an optical disc which has been described previously, is loaded, the DVD recorder 10 compresses the audio / video information that is included in the analog waves. transmits that are received through the antenna 11, record the compressed information as AV files to the DVD-RAM disc, expand the compressed video / audio information, and output the expanded video / audio signals to the display 12 . < 2-2 Construction of a DVD Recorder 10 > FIG. 16 is a block diagram showing the construction of a DVD recorder 10. The DVD recorder 10 includes a control unit 1, an MPEG 2 encoder, a disk access unit 3, an MPEG 4 decoder, a signal processing unit video 5, a remote controller 6, a common bar 7, a remote control signal receiving unit 8 and a receiver 9. The control unit 1 includes a CPU la, a common processing bar Ib, a common bar interface , and a main memory Id. The control unit 1 executes a program stored in the main memory Id to completely control the DVD recorder 10 in terms of recording, playback, editing, etc. Especially after an AV file (VOB) including 'AV information or data is recorded, control unit 1 generates VOB information and information from PGC corresponding to the recorded VOB, and record or update the AV management information or data file. Also, when the AV data or information is reproduced, the control unit 1 controls the reproduction of the section specified by the "Cell" information included in the PGC information in the AV management information file shown in FIG. 12. The MPEG 2 encoder compresses the video / audio information that is included in the analog transmission waves received by the receiver 9 through the antenna 11 and generates MPEG currents.

The disk access unit 3, having buffer tracks 3a, executes the following under the control of the control unit 1: it records the MPEG stream received from the MPEG 2 encoder to the DVD-RAM disc through a single track of buffer 3a, reads the MPEG stream from the DVD-RAM disc, and outputs the MPEG read current to the MPEG 4 decoder through a buffer track 3a. During the dubbing process, the disk access unit 3 performs recording and playback in parallel using a plurality of buffer tracks 3a. The MPEG 4 decoder expands the compressed MPEG stream that is read by the disk access unit 3, and outputs the expanded information of video and audio signals. The video signal processing unit 5 converts the video output information of the MPEG 4 decoder to video signals for the display 12. The signal receiving unit of the remote controller 8 receives signals from the remote controller 6 shown in FIG. 17 and informs the control unit 1 of the operation that the user has given.

The DVD recorder 10 is, as shown in Figure 15, constructed based on the premise that it is used as a replacement for the VTR used in the home. Not limited to the construction, when the DVD-RAM must be used as a computer recording medium, the following constructions are possible. To say, the disk access unit 3 is connected, like a DVD-RAM unit apparatus, to a common bar computer by means of an IF SCSI or IDE call. Also, the components apart from the disk access unit 3 shown in FIG. 3 are carried out or operate when the OS or application program runs on the solid components of the computer. Also, the DVD recorder 10 can be run as a camera (a recorder comprising a camera). In this case, the DVD recorder 10 includes a camera and a microphone in place of the receiver 9. < 2-2-l MPEG 4 Decoder > FIG. 18 is a block diagram showing the construction of the MPEG decoder 4 shown in FIG. 16. As shown in FIG 18, the MPEG 4 decoder includes a demultiplexer 4a for dividing the MPEG currents to video currents and audio streams, a video buffer 4b for temporarily storing the divided video streams, a decoder video 4c for decoding the video streams stored in the video buffer 4b, an audio buffer 4d for temporarily storing the divided audio streams, an audio decoder 4e for decoding the audio streams stored in the audio buffer 4d audio, and an STC 4f unit (System Time Clock) to generate an STC that shows a time reference used in the MPEG decoder 4. The demultiplexer 4a divides a current of MPEG in a video stream and an audio stream. The demultiplexer 4a outputs the video stream that divides the video buffer 4b, and the audio stream that divides the audio buffer 4d. In doing so, the demultiplexer 4a selects either the audio stream # 0 and the audio stream # 1 as the audio stream divided according to a specification of the control unit 1 of an audio stream to be reproduced. The other of the audio streams, not specified by the control unit 1, is discarded. The process mentioned above will be described more specifically. The demultiplexer 4a analyzes the group header and the group header of each packet included in the output of the MPEG stream. The demultiplexer 4a then refers to the current ID and the sub-current ID to identify the current of each group which is any of the video streams, the audio stream # 0, or the audio stream # 1 for dubbing. The demultiplexer 4a discards groups when it finds that the group belongs to an audio stream that is not specified by the control unit 1 as an audio stream to be reproduced. When a packet belonging to an audio stream specified by the control unit 1 is found, the demultiplexer 4a outputs the audio information stored in the payload field of the packet group to the audio buffer 4e with the timing when the STC equals the SCR of the package. At the same time, the demultiplexer 4a outputs the PTS linked to the group to the audio decoder 4e. When a packet belonging to a video stream is found, the demultiplexer 4a outputs the split information stored in the payload field of the packet group to the video buffer 4b with the timing when the STC equals the SCR of the packet . At the same time, the demultiplexer 4a outputs the DTS and PTS assigned to the group towards the video decoder. The information stored in the payload field of each packet is input to the video buffer 4b or the audio buffer 4d at the time indicated by the SCR. The information or data stored in the video buffer 4b by the audio buffer 4d is attracted from the buffer at the time indicated by the DTS. < 2-2-2 MPEG 2 Encoder > FIG. 19 is a block diagram showing the construction of an MPEG 2 encoder shown in FIG. 16. As shown in FIG. 19, the MPEG encoder 2 includes a video encoder 2a, a video buffer 2b, an audio encoder 2c, an audio buffer 2d, a system encoder 2e, an STC 2f unit (System Time Clock) , a coding control unit 2g, and a doubling unit 2h. The video encoder 2a compresses the video signals received via the receiver 9 and generates a video stream. The video buffer 2b temporarily stores the video current output of the video encoder 2a. The audio encoder 2c compresses the audio signals received by means of the receiver 9 and generates an audio stream, during the recording process. The audio encoder 2c compresses another audio source to generate an audio stream, during the dubbing process. The other audio source is for example, an audio signal input through a microphone or an audio signal which is a mixture of an audio signal input through a microphone and a decoded # 0 audio stream. The audio buffer 2d temporarily stores the output of the audio stream from the audio encoder.

The system encoder 2e, including a buffer Al_package 2el: (a) generates packets of video stream and audio stream # 0, (b) generates audio packets of audio stream # 1 for dubbing, and ( c) carries out the multiplexing. In the process (a) mentioned above, the system encoder 2e outputs the video stream from the audio stream # 0 respectively from the video buffer 2b and the intermediate audio memory 2d and sequentially generates video groups (V_PACKS) and audio packages (A0_PACKS). In the process (b) mentioned above, the system encoder 2e generates the audio packets. The (A1_PACKAGES) of the audio stream # 1. In this process, the system encoder 2e generates A1_PACKAGES by copying the A0_PACKAGES of the audio stream # 0 to the buffer 2the A1_PACKAGE, and rewriting a header part of the group and the group header. In the multiplexing of the process (c) mentioned above, the system encoder 2e outputs sequentially to the V_PACKAGE, A0_PACKAGE, and TO the PACKAGE one by one in the order indicated by the SCR. By repeating this, the system encoder 2e outputs these packets as VOB to the disk access unit 3. FIG. 25 shows the output of the VOBs of the system encoder 2e. In the drawing, "V" represents a group of video (V_PACKAGE), "A # 0" an audio packet of audio stream # 0 (A0_PACKAGE), "A # l" an audio packet of audio stream # 1 (A1_PACKAGE). Each pair of A1_PACKAGE and A0_PACKAGE corresponding to each other, have the same information or audio data but have different current IDs (or sub-current IDs) and different SCRs. The SCR of A1_PACKAGE of a pair is equal to SCR of A0_PACKAGE of a pair plus a predetermined value a, so that they are multiplexed to be located in close or adjacent places in the VOB. The STC 2f unit generates an STC that shows a time reference used in the encoder 2. The dubbing unit 2h, after a DVD-RAM disk VOB reading is input to the disk access unit 3 during the process of dubbing, replaces the audio information stored in the payload field of the PACKS in the VOB with new information or audio data taken from the 2d audio buffer, then outputs the VOB to the disc access unit 3 as a VOB after dubbing. FIG. 20 shows the operation executed during the dubbing process. The drawing shows that the VOB is the same before and after the dub except that the A1_PACKAGE changes to A1'_PACKAGE. That is, while the VOB reads from the DVD-RAM disc is played by the MPEG 4 decoder, the doubling unit 2h sequentially stores the VOB groups before its dubbing into the 2hl buffer and then replaces the audio information of the A1_PACK only from stored packages with other information. The disk access unit 3, having track buffer 3a, performs the following under control of the control unit 1: it records the MPEG stream received from the MPEG 2 encoder to the DVD-RAM disk through a memory intermediate track 3a, reading the MPEG stream of the DVD-RAM disc and outputting the read MPEG stream to the MPEG 4 decoder through a track buffer 3a. During the dubbing process, the disk access unit 3 performs recording and playback in parallel using a plurality of track buffer 3a. < 2-2-3 Disk Access Unit 3 > FIG. 21 shows the construction of a disk access unit 3 shown in FIG. 16. The disk access unit 3 includes track buffers 3 through 3, an optical read head 3b, an ECC (Error Correction Code), a processing unit 3c, and switches 3d and 3e. The track buffers 3al and 3a3 are used to read disk information and track buffers 3a2 and 3a4 are used to write on the disk. The processing unit ECC 3c carries out the ECC process in the information read through the optical read head 3b in units of 16 sectors (in an ECC block unit) when the information on the disk is reproduced. The processing unit ECC 3c carries out the ECC process in the input information notwithstanding the switch 3d in an ECC block unit when the information is written on the disk. The switch 3d connects the ECC processing unit 3c to the track buffer 3al or 3a3 so that the information read is stored in the buffer when the information on the disk is reproduced, the ECC processing unit 3c is connected to the track buffer 3a2 or 3a4 when the information is written on the disk, and connects the ECC processing unit 3c to the memory to any of the track buffers 3a through 3a4 in sequence so that the reproduction and writing are carried out in real time when the dubbing process is executed. The switch 3e connects the track buffer 3al or 3a3 to the MPEG 4 decoder when the information on the disc is reproduced, connects the track memory 3a2 or 3a4 to the MPEG 2 encoder when the information is written on the disk. When the dubbing process is carried out, the switch 3e alternately connects the track memory 3al and 3a3 to the MPEG 4 decoder and alternately connects the alternate track memory 3a2 and 3a4 to the MPEG2 encoder. Since the switches 3d and 3e Operating as described above, the reading from the optical disc or the writing on the optical disc can be carried out in parallel with the rewriting of the audio stream # 1 executed by the MPEG 2 encoder. For example, the reading of information from the optical disc and storing the read information to the track buffer 3a3 can be carried out in parallel with the updating of the audio stream # 1 stored in the track buffer 3al and storing the updated audio stream in the the track buffer 3a2. This makes it possible to carry out dubbing in real time while the disc is played. < 2-3 Writing > When the user presses the RECORD key on the remote controller 6, the control unit 1 is notified thereof by means of the signal of the receiver unit of the signal of the remote controller 8 and the common bar 7 shown in FIG. 16. After receiving the aforesaid notification, the control unit 1 instructs the MPEG 2 encoder to compress the video / audio signal included in the analog transmission wave that the receiver 9 has received. The control unit 1 instructs 1 disk access unit 3 to write the VOBs obtained by compression on the optical disk. With the control mentioned above, the MPEG encoder 2 shown in FIG. 19 outputs the video compressed by the video encoder 2a to the video buffer 2b and outputs the audio stream # 0 compressed by the audio encoder 2c to the audio buffer 2d, in sequence. The system encoder 2e generates the audio stream # 1 while outputting the video stream and the audio stream # 0 respectively from the video buffer 2b and the audio buffer 2d, and multiplexes the three streams in the VOBs and it outputs the VOBs to the disk access unit 3 by means of the common baara 7. More specifically, the system encoder 2e: (a) generates groups of the video stream and the audio stream # 0 , (b) generates audio groups of audio stream # 1, and (c) performs multiplexing, as described above. < 2-3-l Generating Video Groups > FIG. 22 is a flow chart showing the process of generating groups of the video stream and the audio streams # 0 and # 1, the process is carried out by the system encoder 2e. The system encoder 2e, at the instant when the video encoder 2a begins to encode, carries out simulations of the amount of information or data of video and of information or audio data respectively, occupying the buffer of the video decoder ( equivalent to the video buffer 4b shown in FIG 18 of a reproducing apparatus and the buffer of the audio decoder (equivalent to the audio buffer 4b shown in FIG 18) of the reproduction apparatus (step 221) The information stored in the payload field of each video group is input to the video decoder buffer of the playback device at the time indicated by the SCR The information is taken from the video decoder buffer at the time indicated by the DTS The buffer capacity of the video decoder has a limit (224 KB according to the standard). Next, when the SCR of the group is defined, however, of the buffer capacity of the video decoder, the buffer may have an overflow in terms of its capacity. The simulation is carried out in step 221 to check the change in the amount of information or data of video and information or audio data respectively occupying the buffer of the video decoder (equivalent to the video buffer 4b shown in FIG. FIG 18) of a reproducing apparatus and the buffer of the audio decoder (equivalent to the audio buffer 4b shown in FIG 18) of reproduction apparatus, according to the changes in the SCR and DTS of the package . FIG. 26 shows the simulation of a video decoder buffer. In the drawing, the horizontal axis represents the time, and the vertical axis the amount of information or video data occupying the video decoder's buffer, TO the moment in which the video buffer begins to receive information, and Vin (the inclination of the graph) the information of the proportion of input bits. Also, T2 and T4-T6 each represent the moments when the information is taken out of the video decoder's buffer. The drawing is described based on the assumption that the transfer of information from the video encoder buffer to the decoder, it is carried out instantaneously. The time TI indicates the moment when a certain amount of information taken from the buffer at time T4 began to be the input path to the buffer. Similarly, the time T3 indicates the moment when a certain amount of information is taken out of the buffer at time T5 beginning to be the input path to the buffer. The period of time between the input and output of a certain amount of information to / from the video decoder's buffer is called VBV delay. The simulation of the buffer occupation of the audio decoder by the information or audio data is similar to the simulation of the video decoder buffer shown in FIG. 26. However, the audio stream has a much smaller amount of information (ratio of bits) than the video stream. Also, the buffer capacity of the audio decoder (4KB according to the standard) is smaller than that of the video decoder buffer. The system encoder 2e determines a packet from which the video information and audio information should be generated, according to the amount of information stored in the video buffer 2b and the audio buffer 2d (step 222). When determined as video information in step 222, the system encoder 2e outputs a predetermined amount of video information (equivalent to the size of the payload field of the video group) of the video buffer 2b (step 223). ), and links the group header and group header to the video information obtained (step 224). When determined as information or audio data in step 222, the system encoder 2e outputs a predetermined amount of audio data or information (equivalent to the size of the payload field of the audio group) of the audio buffer 2d ( step 225), and the group header and group header are linked to the audio information obtained (step 226). A group for audio stream # 1 for dubbing is generated after the group to audio stream # 0. That is, the group for audio stream # 1 is generated by copying the group for audio stream # 0 (step 227). The system encoder 2e stores the generated group in an audio or video packet buffer (not illustrated) in itself (step 229). When an instruction is not detected, the control returns to step 221 (step 230). The generated video / audio groups are stored in the video / audio packet buffers until they are taken out in the multiplexing process. Repeating steps 221 to 230 mentioned above, the system encoder 2e sequentially generates the video / audio packets for the video stream, the audio stream # 0, and the audio stream # 1 respectively stored in the video buffer 2b and audio buffer 2d. < 2-3-2 Generating Audio Stream Packages # 1 > FIG. 23 is a flow chart using the process of generating audio groups of audio stream # 1 for dubbing. That is, the drawing shows a detailed process of step 227 shown in FIG. 22. When a newly created A0_PACKAGE is stored in a group buffer (not shown) (step 231), the system encoder 2e copies the A0_PACKAGE to the buffer of the A1_PACKAGE 2 (step 232). The system encoder 2e then changes the audio current number specified by the ID of the current or substream ID in the A0_PACKAGE stored in the buffer of A1_PACKAGE 2el from # 0 to # 1, and changes the value of a copy mark / original from "0" to "1" (step 234). The system encoder 2e changes the value of the SCR so that the A1_PACKAGE is located immediately after or near the A0_PACKAGE in a VOB (step 235). The groups of the audio stream # 1 are generated as described above. The generated A1_ PACKAGE is stored in the buffer of the Al 2el packet until they are taken out in the multiplexing process.

The SCR value is changed as described above due to the following reason. If there are two groups having the same SCR, the reproduction apparatus outputs the two groups at the same time to the demultiplexer located before the buffer of the audio decoder. This can cause abnormal operation of the demultiplexer. < 2-3-3 Multiplexing > FIG. 24 is a flow diagram of the multiplexing process in which the system decoder 2e multiplexes the video stream and the audio streams # 0 and # 1 into group units. The system encoder 2e performs the multiplexing process in the following manner, in parallel with the generation of the video group, A0_PACKAGE, and A1_PACKAGE shown in FIGS. 22 and 23. The system encoder 2e judges whether one or more groups are stored in any video group buffer, audio group buffer, and the buffer of A1_PACKAGE (step 241). When it is judged that one or more groups have been stored the system encoder 2e reads the SCRs of the groups and detects a group containing the SCR in the first time (step 242). The system encoder 2e outputs the detected packet and deletes the group from the buffer memory (step 243). Repeating these steps, the video packets, AO_packets, and the_packages are multiplexed as a sequence of packets in a single VOB at the time indicated by the SCR. After a VOB is written to the disk, the control unit 1 generates a new VOB information and PGC information shown in FIG. 12 and add the information generated to the AV data management file. In the newly generated VOB information the application indicator of audio stream # 1 for dubbing is put into the "same audio information". The application indicator of audio stream # 0 is set to the same value as audio stream # 1. The newly generated PGC information includes a cell having a reproduction section that has a range from the beginning to the end of the new written VOB. The audio mark included in the cell specifies "audio stream # 0". < 2-4 Dubbing > When the user presses the DUBBING key on the remote controller 6 after specifying PGC, the control unit 1 is notified by means of a remote controller signal receiving unit 8 and the common bar 7 shown in FIG. 16. After receiving said notification in advance, the control unit 1 reads the PGC information and the VOB information of the AV management information file, determines a VOB to be doubled. The control unit 1 controls the disk access unit 3 of the MPEG 4 decoder to read the determined and reproduced VOB of the optical disk. In parallel to this, the control unit 1 controls the MPEG encoder 2 and the disk access unit 3 to modify only the audio stream # 1 in the VOB read by the disk access unit 3 and write the modified VOB to the optical disk. FIG. 27 shows the process of dubbing with timing when the disk access unit 3 performs read / write, and with timing when the MPEG 2 encoder rewrites audio stream # 1. FIG. 29 shows the control of switches 3d and 3e shown in FIG. 21 carried out by the control unit 1 with the times shown in FIG. 27. In FIG. 27, TB1 to TB4 respectively represents the track buffer 3al to 3a4 in the disk access unit 3 shown in FIG. 21. The horizontal axis represents the time and the vertical axis represents the amount of information that each track memory occupies. TI, T2, and T4, and T6 respectively represent the periods of time during the VOB that before being bent are read from the optical disc and are stored in TB1, TB3, TB1, and TB3 by means of the switch 3d. The T3, T5, T7, and T8 respectively represent the periods of time during which the VOB after being bent are taken from TB2, TB4, TB2, and TB4 and written to the optical disk by means of the 3d switch. FIG. 28 shows a VOB that is read and written during the time periods shown in FIG. 27. For example, a section (A) of the VOB before dubbing is read during the TI and section (A) after the dub is written to the disc during T3. In FIG. 27, TA and TC respectively represent the periods of time during which the VOB stored in TB1 are doubled and stored in TB2. During these periods of time, the dubbing unit 2h and the MPEG 2 encoder replace the audio information stored in the payload field of each packet of the audio stream # 1 with new information or audio data. The Tb and Td represent respectively the periods of time during which the VOB stored in TB3 are doubled and stored in TB4. As shown in FIG. 27, there is no gap between the time periods Ta, Tb, Te, and Td. That is, these periods of time are successive. This is achieved by means of the control carried out by the control unit 1 in which the control unit 1 alternately connects two TB pairs (a pair of TB1 and TB2, and a pair of TB3 and TB4) to the encoder MPEG 2 for each Ta, Tb, Te and Td so that the dubbing can be carried out, and at the same time. The other pair of TBs (the pair that is not used during dubbing) is used to read / write information from / to the optical disc. This allows the dubbing unit 2h of the MPEG 2 encoder to perform dubbing consecutively in real time. It is also possible to carry out a partial dubbing by instructing the on / off of the dubbing operation using the remote controller during the dubbing process. This is explained in detail. When an instruction is being received to execute the dubbing (ON) from the signal receiving unit of the remote controller 8 by means of the common bar 7 the control unit 1 instructs the doubling unit 2h of the MPEG 2 encoder to replace the audio information stored in the audio group payload field of audio stream # 1 with new audio information; When an instruction to pause the dubbing is being received (OFF), the control unit 1 instructs the doubling unit 2h to pause the replacement information. It is also possible to return current # 1 of dubbed audio to a state previous to dubbing. To achieve this, the dubbing unit 2h writes the information or audio data stored in the payload field of each packet of the audio stream # 0 over that of the audio stream # 1.

Each time a VOB included in a PGC is doubled, the control unit 1 updates the application indicator of audio streams # 1 of the VOB information corresponding to "dubbing audio information", without updating the application indicator of the # 0 audio streams. The reason for not changing the application mark of audio streams # 0 is as follows. Even after the audio stream # 1 is doubled, it is possible to return to the stream of audio # 1 dubbed to the previous state of dubbing without coding when the application mark of the audio streams # 0 is the "same audio information" , or without recoding the decoded audio signal when the application indicator of audio streams # 0 is "almost the same VOB information". This arrangement is useful for the user. For example, when the user has not been able to perform the dubbing, the user can judge whether the bent # 1 audio stream can be returned to a state previous to dubbing by referring to the application indicator of audio stream # 0, and if so, the user can execute the dubbing again after returning the audio stream # 1 folded to a state prior to dubbing. < 2-5 Reproduction Process > When the user presses the key REPRODUCTION in the remote controller 6, the control unit 1 is notified by means of the signal receiving unit of the remote controller 8 and the common bar 7, shown in FIG. 16 after receiving this notification, the control unit 1 determines a VOB when reading the PGC information and the VOB information from the AV management information or data file. In doing so, control unit 1 also determines which of the audio streams # 0 and # 1 should be reproduced by referring to the audio indicator included in the PGC information, and notifies the MPEG decoder 4 of the result of the determination. The control unit 1 controls the disk access unit 3 of the MPEG 4 decoder to read the determined VOB of the optical disc and to reproduce it. With the aforementioned operation, the PGC specified by the user is reproduced. When the user instructs the change, the audio streams that operate on the remote controller 6 and when the application indicator of the audio stream # 1 indicates "same audio information" or "almost the same information or data of audio ", the control unit 1 does not change the audio streams and instructs the processing unit of the video signal 5 to temporarily add guidance information to the video signal to show the user that the change of audio stream not available. This is because the user gives instructions to the change expecting a different audio, while the same audio will be reproduced with the application indicator "indicating same information or audio data" or "almost same information or audio data" even if the audio stream is alternated from # 0 to # 1, and in this case the user may misinterpret the operation that in the DVD recorder has broken down and has failed to change the audio streams. When the user instructs to change the audio streams operating the remote controller 6 and when the audio stream application indicator # 1 indicates "bending information or audio data" or "personalized audio information or data", the control unit 1 instructs the MPEG 4 decoder to change the audio current from # 0 to # 1. As is apparent from the aforementioned description, the VOB recorded on the optical disc DVD-RAM of the present embodiment, each has a predetermined amount of space that can store information for dubbing. This allows the audio information to be bent in the VOB without having to re-encode or re-locate the VOB. In the present embodiment, dubbing can be carried out without difficulty simply by replacing the information or audio data in the packets with other information since the predetermined amount of space mentioned above is obtained as an audio stream. In this embodiment, the recorder can perform dubbing without difficulty since the same information or audio data as the original audio stream # 0 is recorded in audio stream # 1 for dubbing.

The recorder can generate an audio stream for dubbing without difficulty when the same encoding mode and the same bit rate are assigned to both # 0 and # 1 audio streams. In this case, the recorder accomplishes this only by copying groups of audio stream # 0 and changing a portion of the packets (the SCRs, the current IDs or the sub-current IDs) when the VOBs are recorded on the disc. The optical disc of the present invention can be taken as an optical disc for Karaoke in which the audio stream # 0 as original audio information or data and the audio stream # 1 for dubbing is multiplexed in the VOB. With this construction, the input sound through a microphone can be mixed with the original audio information recorded in the audio stream for dubbing. Also, a partial dubbing or a full dubbing can be repeated. In the present embodiment, each VOB includes two audio streams. However, only one audio stream for dubbing can be included in each VOB when there is no original audio stream. In this case, for example, information or data without sound can be recorded in the audio stream for dubbing. In this modality, audio stream # 1 for dubbing is generated by copying audio stream # 0. However, the audio stream # 1 for dubbing can be generated as a different current (ie, a different current than the audio stream, or an audio stream storing information or data without sound). The audio stream # 1 may be recorded with a different encoding mode or a sampling frequency other than the audio stream # 0 in the present embodiment. This is achieved by allowing the MPEG encoder to include two pairs of an audio encoder and an audio buffer. FIG. 30 shows the construction of an MPEG encoder. Compared to the construction shown in FIG. 19, the present construction further includes a 2cl audio encoder and an audio buffer 2dl. With the construction present, it is possible to record the audio stream # 1 with the application indicator indicating "almost the same information or audio data".

It is also possible to carry out the dubbing by replacing the audio information or data in audio stream # 0 in packet units. In this case, the "AudioO attribute" is used to manage the state of audio stream # 0 regardless of whether the current has been doubled or not. In this modality, the value of the copy / original indicator in the A1_PACKAGE can be changed to "0" (original) after the package has been doubled. In addition, the value of the copy / original indicator in the A1_PACKAGE may indicate something different. For example, the mark can be set to indicate "original" when it is first recorded on the disc. However, the playback time periods of audio stream # 0 and # 1 may not fully match. For example, audio stream # 1 can be generated by copying audio stream # 0 excluding a part of stream # 0 that corresponds to the playback time period that is expected not to be bent. < Second Modality > < 1 Optical Disk > The optical disc of the Second Mode differs from that of the First Mode in that the sub-picture stream for dubbing is multiplexed into the VOB. Here, the sub-image (referred to later as SP) is a frozen image superimposed on the video image as a subtitle, textual information or the like. The following description focuses on characteristics of the present modality. FIG. 31 shows a structure of the VOB in the present embodiment in which the elementary streams (video currents, audio currents and SP currents) are very multiplexed. In the drawing, the stream SP 76 is frozen image information or data (i.e., a code sequence generated by compressing a bitmap image with the run length coding method) that includes a plurality of pieces of information or frozen image data corresponding respectively to a plurality of VOBU in the VOB. Nevertheless, since the current of SP 76 is used for dubbing, the current of SP 76 only requires that it have a predetermined size (ie, a size corresponding to half of the display screen to be displayed in the lower part). of the screen) and can be composed of invalid image information when the SP 76 stream is first recorded on the disc. As shown in the sequence of the package in FIG. 31, the SP 76 stream is multiplexed into the VOB as packets together with the video stream and audio streams # 0 and # 1. The SP packets in a VOBU are effective during the VOBU's playing period. That is, the image information of at least one frozen image is distributed over a VOBU as SP packets and is superimposed on the video image during the reproduction period of the VOBU. FIG. 32 shows an information format of the SP package. The drawing, the undercurrent ID "0010 0000" indicates the package of SP. The other elements of the information format • are the same as the information format shown in FIGs. 10 and 11. FIG. 33 hierarchically shows the information or data structure of the AV administration information or data file. The present information or data structure differs from that shown in FIG. 12 in which it also has an SP attribute.

As shown in the fourth and fifth layers, the SP attribute includes an application indicator. The present application indicator may differ from that in the First Mode. That is, the value of the "Application Indicator" indicates either "Folded" or "Not Folded". Nevertheless. When only one SP stream is multiplexed in a VOB, the application indicator is set to "SP Custom Information" when the SP stream is first written to the disc, and the application indicator is set to "Doubling the SP "when the dubbing takes place in the SP current. < Optical Disc Recording / Reproducing Apparatus The optical disc recording / reproducing apparatus (hereinafter referred to as a recorder) of the present embodiment differs from that of the First Mode in that it includes an MPEG 12 encoder and an MPEG 14 decoder instead. of an MPEG 2 encoder and an MPEG decoder 4. The following description focuses on the features of the present embodiment. FIG. 34 is a block diagram showing the construction of an MPEG decoder 12. Compared to the construction of an MPEG encoder 2 shown in FIG. 19, the present construction includes an SP encoder 2i and an SP buffer 2j, and includes a system encoder 2k and a bending unit 2m in place of the system encoder 2e and the bending unit 2h. The SP 2i encoder generates an SP current when coding SP information or data for each VOBU with the run length coding method. The buffer SP 2j temporarily stores the contents of the SP current generated by the SP 2i encoder in sequence. The system encoder 2k has the function of generating SP packets of the SP stream for dubbing when the VOB is recorded on the disk, as well as the functions of the system encoder 2e. That is, the system encoder 2k generates SP packets that correspond to a predetermined size of frozen image information for each VOBU. By doing this, the invalid information or data can be included in the SP packages. The generated SP packets are multiplexed in the VOB together with the video packets and audio packets (A0_PACKAGES and A1_PACKAGES).

Alternatively, the contents of the SP stream stored in the SP buffer can be converted into packets and multiplexed into the VOB in sequence. The doubling unit 2m, has, as the doubling functions of 2h, has a function of replacing, for each VOBU, the information or data stored in the payload field of the SP PACKAGES with the contents of the SP current stored in the SP buffer. For this purpose, the 2m dubbing unit has a 2ml packet buffer to store the SP packages of the VOB used for the aforementioned replacement. FIG. 35 is a block diagram showing the construction of the MPEG decoder 14. Comparing to the construction of the MPEG decoder 4 shown in FIG. 18, the present construction includes a buffer SP 4g, a decoder SP 4h, and a combiner unit 4i. The buffer 4g temporarily stores the SP packets that have been separated from the VOB by the demultiplexer 4a.

The SP 4h decoder decodes the information (having been encoded with the run length coding method) in the SP packets transferred from the SP 4g buffer. The combiner unit 4i combines the video data or information output of the video decoder 4c with the frozen image data or information output of the SP decoder so that the frozen images are superimposed on the video images. As it is apparent in the description mentioned above, the VOB recorded on the optical disk of the present embodiment each have a predetermined amount of space that can store sub-picture information for dubbing. This allows sub-images to be dubbed into VOB without having to recode or relocate VOBs. In the present embodiment, only one SP stream for dubbing is multiplexed in each VOB. However, the two SP currents can be multiplexed in each VOB as two audio streams are multiplexed in the First Mode. In the present embodiment, three types of audio coding modes: MPEG audio, AC 3, and linear PCM are used. However, not limited to these modes, other encoding modes can be adopted. In the present embodiment, it is described that a group includes a group. However, a group may include a plurality of groups. In the present embodiment, the DVD-RAM is used as a recording medium. However, not limited to this, other rewritable media such as MO or HDD can be used to obtain the same effects.

POSSIBILITY OF INDUSTRIAL USE The recordable optical disc of the present invention stores one or more video objects which each include a video stream, a first audio stream, and a second audio stream multiplexed therein, the second audio stream used for dubbing . Such an optical disc facilitates dubbing. Also, the optical disc player apparatus or method of the present invention multiplexes the second audio stream for dubbing to the video objects when the video objects are first recorded on an optical disc. Such an optical disc player apparatus is suitable for recording video objects facilitated for dubbing optical discs. In addition, the computer-readable storage medium stores a program for recording video objects on an optical disc. Such a storage medium is suitable for recording video objects provided for dubbing optical discs. The optical disc player apparatus or the method of the present invention changes the reproductions of the first audio stream and the second audio stream in accordance with an instruction of a user when the optical disc has been executed by bending; and when the dubbing has not been carried out on the optical disc, the optical disc player apparatus notifies the user that the audio streams can not be changed. Such an optical disc reproducing apparatus suitable for reproducing the optical disc whether or not the optical disc has been executed with dubbing.

Claims (41)

1. A recordable optical disk, characterized in that it comprises: an information or data area in which one or more video objects are recorded, in which a video stream, a first audio stream, and a second audio stream are multiplexed in one or more video objects, the second audio stream being used for dubbing.

2. The recordable optical disk according to claim 1, characterized in that the video stream for the dubbing has the same reproduction time period as that of the first audio stream.

3. The recordable optical disc according to claim 2, characterized in that the second audible current for the dubbing is recorded with the same proportion of bits as in the first audio stream.

4. The recordable optical disc according to claim 3, characterized in that the first audio stream includes a plurality of packets in which each has a predetermined size, and the second audio stream includes a plurality of packets included in the first audio stream. .

5. The recordable optical disk according to claim 4, characterized in that each of the plurality of packets in the second audio stream includes the same audio information as that included in a corresponding one of the plurality of packets of the first audio stream. .

6. The recordable optical disc according to claim 4, characterized in that each of the plurality of packets in the second audio stream includes information or data without sound.

7. The recordable optical disc according to claim 2, characterized in that the second audio stream for the dubbing includes audio information that has been generated from the same source as the first audio stream.

8. The recordable optical disc according to claim 2, characterized in that the second audio stream includes information or data without sound.

9. The recordable optical disc according to claim 1 further comprising: an administration area for storing one or more pieces of administration information corresponding respectively to one or more video objects, each or more of the pieces of administration information shows a state of the second video stream in a corresponding video object and indicates whether the dubbing has been carried out in the second audio stream in the corresponding video object.

10. The recordable optical disc according to claim 9, characterized in that each or more of the administration information pieces further indicates whether the second audio stream includes the same information or audio data as the first audio stream.

11. The recordable optical disc according to claim 9, characterized in that each or more of the administration information pieces further indicates whether the second audio stream has been generated from the same source as the first audio stream.

12. The recordable optical disk according to claim 9, characterized in that each or more of the administration information pieces further indicates, one of a first state, a second state, and a third state wherein the first state indicates that the second audio stream includes the same information or audio data as in the first audio stream, the second state indicates that the second audio stream includes information or audio data that has been generated from the same source as in the first audio stream , and the third state indicates that the audio information of the second audio stream is irrelevant to the audio information or data of the first audio stream.

13. The recordable optical disc according to claim 1 further comprising: an administration area for storing one or more pieces of administration information corresponding respectively to one or more video objectsEach one of the pieces of administration information shows a state of the second audio stream in a corresponding video object, characterized in that each or more of the pieces of administration information also indicates one of a first state, a second state, a third state, and a fourth state, wherein the first state indicates that the second audio stream includes the same audio information as in the first audio stream, the second state indicates that the second audio stream includes information or audio data that has been generated from the same source as in the first audio stream, the third indica state that the audio data or information of the second audio stream is irrelevant to the audio data or information of the first audio stream. audio, and the fourth state indicates that the second audio stream has been executed by dubbing.

14. A recordable optical disk comprising: an information area in which one or more video objects are recorded, in which a plurality of elementary streams are multiplexed into one or more video objects, characterized in that it comprises: one of the plurality of streams elementary is a video stream and another is an I dubbing current that is used to dub either audio information or data or sub-picture I information or data; and an administration area for storing one or more pieces of management information corresponding respectively to one or more video objects, each or more of the pieces of management information showing a state of the dubbing stream in a video object correspondent.

15. The recordable optical disc according to claim 14, wherein: the doubling current is used to bend the sub-picture information representing one or more frozen images, each or more of the video objects includes a plurality of units of objects video, and each of the plurality of the video object units includes a part of the video stream that corresponds to a predetermined playing time and includes a part of the dubbing stream to be played along with the part of the video stream, characterized in that the part of the doubling stream corresponds to at least one frozen image, and each or more of the administration information pieces indicates whether the dubbing has been carried out in the stream of dubbing in the corresponding video object.

16. The recordable optical disc according to claim 15, characterized in that a part of the doubling current included in each video object unit corresponds to a frozen image having a predetermined size.

17. An optical disc player apparatus for recording one or more video objects on an optical disk, wherein each or more of the video objects includes a video stream, a first audio stream and a second audio stream, and the optical disc player apparatus characterized in that it comprises: an input means for receiving the video stream and the first audio stream; a means that generates an audio stream to generate, based on the first received audio stream, a second audio stream that is used for dubbing; a multiplexing means for generating one or more video objects by multiplexing the second generated audio stream, the received video stream, and the first received audio stream towards one or more video objects; and a recording medium for recording one or more generated video objects to the optical disc.

18. The optical disc recording apparatus according to claim 17, characterized in that: the second audio stream generated by the audio stream generating means includes the same audio data or information as in the first audio stream.

19. The optical disc recording apparatus according to claim 18, characterized in that: the first audio stream received by the input means includes packets that each have a fixed size, and the audio stream generating means include: a memory intermediate to sequentially store packets included in the first received audio stream; and control means for carrying out a control so that the packets stored in the buffer memory are output to be included in the second audio stream.

20. The optical disc recording apparatus according to claim 19, characterized in that: each packet includes a timestamp and a current identifier, the time indicator specifying a time at which each packet. it is output from a track buffer of a reproducing apparatus, and the control means that update the timestamps and current identifiers of the packets stored in the buffer.

21. The optical disc recording apparatus according to claim 17, characterized in that it further comprises: a read / write means for reading a video object of the optical disc; a first buffer means including a first read buffer and a first write buffer, the first read buffer which stores a part of the read video object, and the first write buffer which stores a part of the read object; read video object that is to be written to the optical disc; a second buffer means including a second read memory and a second write memory, the second read memory that stores a part of the read video object, and the second write buffer that stores a part of the video object read that has to be written on the optical disc; and a dubbing control means that a control is carried out so that while the video object is already read or write to / from the optical disk using one of the first buffer means and the second memory means intermediate, the second audio stream in the part of the video object stored in the read buffer of the other first buffer medium and the second buffer media are updated, and the part of the video object including the second stream updated video is stored in the write buffer of the other buffer medium, wherein the read / write means sequentially writes the part of the video object in the first write buffer and the part of the video object in the second write buffer on the optical disc, characterized in that after the second audio stream is carried out by doubling, the medium of The dubbing tool is able to re-establish the second audio stream to a state prior to dubbing by copying the audio information from the first audio stream to the second audio stream.

22. The recording device of the optical disc according to claim 17, characterized in that: the second audio current generated by the audio current generating means includes information or audio data that has been generated from the same source as the first audio stream. Audio.

23. The optical disc recording apparatus according to claim 17, characterized in that: a read / write means for reading a video object of the optical disc; a first buffer means including a first read buffer and a first write buffer, the first read buffer which stores a part of the read video object, and the first write buffer which stores a part of the read object; read video object that has to be written to the optical disc; a second buffer means including a second read buffer and a second write buffer storing a part of the read video object and the second read buffer which stores a part of the read video object to be written on the optical disc; and a dubbing control means for performing a control so that when either the video object is writing or reading to / from the optical disc using any of the first buffer medium and second buffer medium, the second audio stream in the part of the video object stored in the read buffer of the other first buffer medium and the second buffer medium is updated, and that the part of the video object including the second updated audio stream is stored in the write buffer of the other buffer means, characterized in that: the read / write means sequentially write the part of the video object in the first write buffer and the part of the video object in the second memory intermediate write to the optical disc.

24. The optical disc recording apparatus according to claim 23, characterized in that: the dubbing control means instructs the read / write means to read a piece of administration information corresponding to the video object read by the medium of read / write, which updates the read piece of administration information so that the information indicates that the dubbing has been carried out on the video object, and instructs the read / write means to write to the updated piece of administration information on the optical disc.

25. An optical disc reproducing apparatus for recording one or more video objects on an optical disc, wherein each or more of the video objects includes a video stream, the optical disc recording apparatus is characterized in that it comprises: a medium input to receive the video stream; a doubling current generating means for generating a doubling current that is used for dubbing; a multiplexing means for generating one or more virtual video objects by iplexing the generated doubling current and the received video current in one or more video objects; a means for generating management information to generate one or more pieces of management information corresponding respectively to one or more video objects, each of the management information pieces or pieces indicate whether the dubbing has been carried out in the doubling current of the corresponding video object; and a recording medium for recording the generated video object (s) and the management information piece (s) generated on the optical disk.

26. The optical disc recording apparatus according to claim 25, characterized in that it further comprises: a read / write means for reading a video object from the optical disc; a first buffer means including a first read buffer and a first write buffer, the first read buffer which stores a part of the read video object, and the first write buffer which stores a part of the read object; read video object that has to be written to the optical disc; a second buffer means including a second read buffer and a second write buffer, the second read buffer that stores a part of the read video object, and the second write buffer that stores a part of the read object; read video object that has to be written to the optical disc; and a dubbing control means for performing a control so that while the video object is in read and write to / from the optical disc using one of the first buffer means and the second buffer means; the dubbing stream in the part of the video object stored in the read buffer of the other first buffer medium and second buffer media are updated, and the part of the video object including the updated dubbing stream is stored in the write buffer of the other buffer means, characterized in that: the read / write means sequentially write the part of the video object in the first write buffer and the part of the video object in the second write buffer to the optical disc.

27. The optical disc recording apparatus according to claim 26, characterized in that: the dubbing control means instructs the read / write means to read a piece of management information corresponding to the video object read by the reading means / write, update the read piece of administration information so that the information indicates that the dubbing has been carried out on the video object, and instructs the read / write means to write the updated piece of administration information to the disk optical.

28. A method for recording one or more video objects on the optical disc, the method is characterized in that it comprises: a obtaining step for obtaining a video stream and a first audio stream; a step generating the audio stream to generate a second audio stream having a proportion of bits with which the audio information corresponding to a period of time of reproduction of the first audio stream is recorded in the second current of Audio; and a recording step for generating one or more video objects by multiplexing the second generated audio stream, the obtained video stream, and the first audio stream obtained in one or more video objects and recording one or more video objects generated in the optical disk.

29. The method for recording one or more video objects on an optical disc according to claim 28, characterized in that: the second audio stream generated in audio stream generating step that includes the same audio information as the first audio stream .

30. The method for recording one or more video objects on an optical disc according to claim 29, characterized in that: the second audio current generated in audio stream generating step that includes audio information that has been generated from the same source than the first audio stream.

31. The method for recording one or more video objects on an optical disc according to claim 30, characterized in that: the first audio stream obtained in the obtaining step includes a plurality of packages that each have a predetermined size, and the step audio stream generator includes: a storage sub-step for temporarily storing the first audio stream obtained in a buffer in sequence in units of packets; and a sub-step controller to perform a control so that the packets stored in the buffer are output to be included in the second audio stream.

32. The method for recording one or more video objects on an optical disc according to claim 29, characterized in that it further comprises: a restoration step so that, when the second audio stream is carried out by doubling, restoring the second current of audio to a state before dubbing by copying the audio information from the first audio stream to the second audio stream.

33. The method for recording one or more video objects on an optical disk according to claim 28, characterized in that: each packet includes a time stamp and a current identifier, the time indicator specifying a time at which each packet is of outputting a track buffer of a reproducing apparatus, and the audio stream generating step updates timestamps and current identifiers of the packets stored in the buffer.

34. A computer-readable storage medium storing a program for recording one or more video objects on an optical disc, the program is characterized in that it comprises: a segment of a program for instructing a computer to receive a video stream and a first audio stream; a program segment for instructing the computer to generate a second audio stream having a bit rate with which the information or audio data corresponding to a playback period time of the first audio stream is recorded in the second audio stream. a program segment for instructing the computer to generate one or more video objects by multiplexing the second generated audio stream, the received video stream, and the first received audio stream in one or more received video objects; and a segment of a program to instruct the computer to record one or more video objects generated on the optical disc.

35. The computer readable storage medium according to claim 34, characterized in that: the second audio stream generated has the same audio information as the first audio stream.

36. The computer readable storage medium according to claim 35, characterized in that: the first received audio stream includes packets that each have a fixed size, and the segment of the audio stream generator program instructs the computer to store temporarily packets included in the first audio stream received in a buffer in sequence, and instruct the computer to carry out a control so that the packets stored in the buffer are output to be included in the second audio stream .

37. The computer readable storage medium according to claim 36, characterized in that: each packet includes a timestamp and a current identifier, the time indicator specifying a time at which each packet is output from a buffer of track of a reproducing apparatus, and the segment of the audio stream generator program instructs the computer to update timestamps and current identifiers of the packets stored in the buffer.

38. The computer-readable storage medium according to claim 35, characterized in that it further comprises: a program segment for giving instructions to the computer, after the second video stream is carried out doubling, the second current is restored audio to a state prior to dubbing by copying the audio information from the first audio stream to the second audio stream.

39. The computer-readable storage medium according to claim 35, characterized in that: the segment of the audio stream generating program instructs the computer to generate the second audio stream that includes audio information that has been generated therefrom. source than the first audio stream.

40. An optical disc player apparatus for reproducing an optical disk wherein the optical disk includes: an information area in which one or more video objects are recorded, wherein a video stream, a first audio stream, and a second audio stream are multiplexed into one or more video objects; and an administration area for storing one or more pieces of management information corresponding respectively to one or more video objects, wherein the second stream has a proportion of bits in which the audio information corresponding to a period of time of the first audio stream is recorded in the second audio stream, wherein each of the or more pieces of administration information further indicates one of a first state, a second state, a third state, and a fourth state , wherein the first state indicates that the second audio stream includes the same audio information as the first audio stream, the second state indicates that the second audio stream includes audio information that has been generated from the same source as the audio stream. First audio stream, the third state indicates that the audio information of the second audio stream is irrelevant to the audio information. or the first audio stream, and the fourth state indicates that the second audio stream has been carried out by doubling, the optical disc reproducing apparatus is characterized in that it comprises: a reading means for reading a video object and a piece of administration information corresponding to the video object of the optical disk; a reproduction medium for reproducing the video stream and the first audio stream included in the video object read; a control means for controlling the reproduction means so that when the management information piece indicates the fourth state, the reproduction medium is allowed to change reproductions of the first audio stream and the second audio stream in accordance with the instruction to change incoming audio streams of the user, and that when the piece of management information indicates any of the first state and the second state, the reproduction medium is not allowed to change reproductions of the first audio stream and the second audio stream even when the instruction is input from the user, and the playback media notifies the user that the audio streams can not be changed.

41. An optical disc reproducing method for reproducing an optical disc, wherein the optical disc includes: a data area in which one or more video objects are recorded, wherein a video stream, a first audio stream, and a second audio stream is multiplexed into one or more video objects; and a handling area for storing one or more pieces of management information corresponding respectively to one or more video objects, wherein the second audio stream has a proportion of bits with which the audio information corresponding to a period of playing time of the first audio stream is recorded in the second audio stream, wherein each or more of the driving information pieces further indicates one of a first state, a second state, a third state and a fourth state, wherein the first state indicates that the second audio stream includes the same audio information as the first audio stream, the second state indicates that the second audio stream includes audio information that has been generated from the same source as the audio stream. the first audio stream, the third state indicates that the audio information of the second audio stream is irrelevant to the audio information of the first audio stream, and the fourth state indicates that the second audio stream has been carried out by doubling, the optical disc reproduction method is characterized in that it comprises: a reading step for reading a video object and a piece of information of handling corresponding to the video object of the optical disc; a reproduction step for reproducing the video stream and the first audio stream included in the read video object; a control step so that, when the management information piece indicates the fourth state, let the playback step change reproductions of the first audio stream and the second audio stream in accordance with an instruction to change audio streams input by a user, and that when the management information piece is of the first state and the second state, not allowing the reproduction step to change reproductions of the first audio stream and the second audio stream even when the instruction is input by the user, and that the playback step notifies the user that the audio streams can not be changed.