JP2002352510A - Optical disk, information recorder, information reproducing device, and information recording/ reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable recording and efficient copy of optional contents distributed by an electronic music distribution system ensuring compatibility in reproduction of all tunes recorded on a disk. SOLUTION: At least an audio object(AOB) ensuring compatibility in reproduction and its reproduction control information are recorded and EMD contents distributed by the electronic music distribution system are recorded at need. In the EMD contents, unique audio data and reproduction control information is included. In addition, information to make the AOB correspond to EMD contents to each other is recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a readable / writable optical disk, an information recording device thereof, and an information reproducing device. In particular, the present invention relates to an optical disk on which audio data is recorded, and an information recording and information reproducing apparatus.

[0002]

2. Description of the Related Art As a readable and writable optical disk capable of storing digital data including video and audio data, there is a DVD-RAM having a recording capacity of 4 GB or more in a phase change type. Digital audio data that can be recorded on DVD-RAM is LPCM (Linear PCM)
MLP system, AC3, MP3 system, AAC system, ATR
There are various coding schemes such as the AC3 scheme.

[0003] LPCM is an uncompressed encoding system used in CDs, and typically encodes audio information by 16-bit quantization. The DVD-RAM can record LPCM audio data quantized at a sampling rate of 44.1 kHz for about 9 hours. LPCM has the advantage of high sound quality because it is uncompressed, but has the disadvantage of requiring a high recording rate for the disk due to the high read rate from the disk.

On the other hand, in AC3 and MP3, audio information is compressed and encoded at a fixed bit rate (CBR). Since the AC3 system and the MP3 system are systems in which audio information is encoded by compression, the reading rate from the disk can be suppressed, and there is an advantage that the recording capacity of the disk can be reduced. On the other hand, there is a demerit that the sound quality is deteriorated as compared with the LPCM method because information is deteriorated during compression.

In AAC and ATRAC 3, audio information is compressed and encoded at a variable length bit rate (VBR). In the AAC system and the ATRAC 3 system, when compressing audio information, a large amount of information is allocated to a complicated part and a small amount of information is allocated to a simple part such as a silent part. For this reason, if the amount of information is the same,
It is possible to perform compression while maintaining high sound quality as compared with a fixed length bit rate coding method.

The MLP method uses a variable length bit rate (V
BR) encodes the audio information by performing lossless compression. Lossless compression is an encoding method in which sound quality does not deteriorate due to compression. In addition to the merit that sound quality does not deteriorate, the reading rate from the disk is higher than that of other compression encoding methods, but can be suppressed more than LPCM.

[0007] Further, with the invention of these various compression encoding systems and the rapid spread of Internet technology in recent years, many electronic music distribution systems have started services. In these systems, by using the compression encoding method, it is possible to distribute contents including audio data to a user in an appropriate time even when using a network with a narrow band. Many of these electronic music distribution systems are premised on the use of a PC, and therefore compatibility has not been a major problem. For this purpose, a number of electronic music distribution system services are used, and the data structure of the content is different between these systems.

Further, in the electronic music distribution system, a copy control system different from the conventional one is often adopted. The conventional copy control system is a generation-managed copy, and is managed so that a copy can be made from an original medium but a grandchild copy cannot be made. As a method for realizing such copy control, SCM used in CD / MD is used.
S and CPPM used in DVD-Audio exist. In contrast, in electronic music distribution systems,
A method called MOVE or CHECK OUT / IN is often used. If the move is to copy contents from the original medium to another medium, the contents existing on the original medium are deleted at this time. The copy-destination medium created in this way can be transferred to another medium again as an original medium.
E is often allowed.

In CHECK OUT, counter information is recorded together with the content on the original medium. When copying to another medium, the content is copied and the counter information is modified. If the counter reaches a certain number, no more copies are allowed. Further, it is not allowed to create a grandchild copy from the copy destination medium. CHECK IN performs the reverse operation of CHECK OUT. That is, the content of the copy destination medium created by CHECK OUT is deleted, and at the same time, the counter information existing in the original medium is updated. This makes it possible to make a copy from the original medium to another medium.

[0010]

In order to use the contents of the electronic music distribution system with a home audio recorder / player using a DVD-RAM, the data format of the disc and its device are the same as those of the LPCM system described above. Audio data is recorded on the disc using the compression encoding method, and playback compatibility, which is an essential feature required by consumer devices, is guaranteed, and new copy control methods such as MOVE and CHECK OUT can be used if possible. A data format and its recording device are required.

Specifically, the data structure of the data format requires the following three.

(1) To have audio data and reproduction control information for ensuring reproduction compatibility. Unlike a PC, a home audio player cannot support all electronic music distribution systems. For this purpose, it is necessary to determine a processing device that is indispensable for all audio players, and to assure reproduction compatibility by recording audio data and reproduction control information that can be processed by this processing device.

(2) Having audio data distributed by the electronic music distribution system and reproduction control information thereof. This is necessary to use a new copy control method used in an electronic music distribution system such as MOVE or CHECK OUT. In addition, when the audio data is copied to another medium in a move or the like, if the original compressed audio data exists, the copy can be performed at high speed without deteriorating the sound quality.

(3) The audio data of (1) and (2) and the reproduction control information thereof can be displayed as the same content from the user's viewpoint. Although the contents (1) and (2) are mixed on the medium, it is desirable that these contents are uniformly managed from the viewpoint of the user.

An object of the present invention is to provide an optical disk on which data is recorded in a disk format which solves the above-mentioned problems, and an information recording apparatus and an information recording / reproducing apparatus for the optical disk.

[0016]

In order to solve the above-mentioned problems, an optical disk according to the present invention comprises a first audio data and a first audio data.
An optical disc storing first reproduction control information on audio data, second audio data, and second reproduction control information on second audio data, wherein the first reproduction control information is at least the second reproduction data. Characterized in that it has link information for holding the recording position of the reproduction control information and recording system type information for recording the recording system type of the second reproduction control information.

An information recording apparatus according to the present invention is an information recording apparatus for recording first audio data and first reproduction control information relating to the first audio data, wherein the first audio data and the first audio data are recorded. An acquisition unit for acquiring reproduction control information, an audio conversion unit for creating second audio data based on the first audio data, and an audio conversion unit based on the first reproduction control information.
Reproduction control information conversion for creating second reproduction control information having at least link information for holding the recording position of the second reproduction control information and recording system type information for recording the recording system type of the second reproduction control information Unit, a recording unit that records the audio data and the reproduction control information, and acquires the first audio data and the first reproduction control information by controlling the acquisition unit, and controls the audio conversion unit to acquire the first audio data and the first reproduction control information. 2 and generates the second reproduction control information by controlling the reproduction control information conversion unit, and controls the recording unit to control the first and second audio data and the first and second audio data. And a control unit for recording the reproduction control information.

Further, the information reproducing apparatus of the present invention may include a first audio data and first reproduction control information relating to the first audio data, and a second reproduction control information relating to the second audio data and the second audio data. A reproducing apparatus for reproducing, wherein the first reproduction control information is at least link information for holding a recording position of the second reproduction control information and a recording method type for recording a recording method type of the second reproduction control information. Having information, an acquisition unit that acquires the audio data and reproduction control information, an audio reproduction unit that reproduces the audio data, and a determination unit that determines whether the recording method type is a reproducible recording method,
Based on the recording system type information described in the first playback control information, the determination unit is controlled to determine whether or not the second playback control information and the audio data can be played back. The first audio data is reproduced based on the first reproduction control information, and if the reproduction is possible, the acquisition unit is controlled based on the link information described in the first reproduction control information. A control unit that acquires the second reproduction control information and reproduces the second audio data based on the control information.

Further, the information recording / reproducing apparatus of the present invention comprises: first reproduction control information relating to the first audio data and the first audio data; and second reproduction control information relating to the second audio data and the second audio data. An information recording / reproducing apparatus for recording / reproducing information, wherein the first reproduction control information includes at least link information holding a recording position of the second reproduction control information and a recording method type of the second reproduction control information. The first audio data and the first audio data have the recording method type information to be recorded.
An acquisition unit that acquires the reproduction control information, the second audio data, and the second reproduction control information, an audio reproduction unit that reproduces the first audio data, and the second audio data and the second reproduction control. A recording unit for recording information, an input unit for receiving an instruction of reproduction or recording from a user of the apparatus, and an instruction for controlling the input unit to receive an instruction from the user of the apparatus, and when the instruction is reproduction, Controlling the acquisition unit to acquire first audio data and first reproduction control information; controlling the audio reproduction unit according to the first reproduction control information to reproduce the first audio data; Is recording, the acquisition unit is controlled to acquire second audio data and second reproduction control information, and the recording unit is controlled to acquire second audio data and second reproduction control information. And a control unit for writing information.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 (1-1) Physical Structure of Optical Disk FIG. 36 shows a DVD-RAM which is a recordable optical disk.
FIG. 3 is a diagram illustrating an appearance of a disk. As shown in this figure,
The DVD-RAM is loaded into the video data editing device while being stored in the cartridge 75. Book cartridge 7
Reference numeral 5 is for protecting the recording surface of the DVD-RAM.
The AM is accessed by opening and closing the shutter 76.

FIG. 37A shows a recording area of a DVD-RAM disc which is a recordable optical disc. As shown in the figure, the DVD-RAM disk has a lead-in area at the innermost circumference, a lead-out area at the outermost circumference, and a data area between them. The lead-in area is
A reference signal necessary for stabilizing the servo at the time of access of the optical pickup, an identification signal with another medium, and the like are recorded. The same reference signal as the lead-in area is recorded in the lead-out area. The data area is
Sector which is the minimum access unit (2k bytes)
Is divided into

FIG. 37B is a diagram showing a cross section and a surface of a DVD-RAM. As shown in the figure, one sector is composed of a pit row portion formed on the surface of a reflective film such as a metal thin film, and an uneven portion. The pit row portion is 0.4 μm to 1.87 μm stamped to represent a sector address.
Consisting of pits.

The concavo-convex portion comprises a concave portion (called a groove) and a convex portion (called a land). Each land and groove has a recording mark, which is a metal thin film capable of phase change, attached to each surface. The phase change means that the state of the attached metal thin film changes between a crystalline state and an amorphous state by light beam irradiation. Data can be written in the concave-convex shape portion by utilizing the phase change. In the case of the MO disk, only the land portion is used for recording, whereas in the DVD-RAM, data can be recorded also in the land portion and the groove portion. The realization of data recording in the groove portion increases the recording density as compared with the MO. Error correction information for a sector is made for every 16 sectors.

In this embodiment, ECC (Error Correc
ting Code) is assigned to the sector group (16 sectors).
Called CC block. In addition, DVD-RAM has a recording /
During playback, Z CLV (Zone Constant Linear Vel
In order to realize rotation control called ocity), the data area is divided into a plurality of zone areas.

FIG. 38 (a) is a diagram showing a plurality of zone areas provided concentrically on a DVD-RAM. As shown in the figure, the DVD-RAM is divided into 24 zone areas of zone 0 to zone 23. Here, the zone area refers to a group of tracks accessed at the same angular velocity. In the present embodiment, one zone area includes 1888 tracks. The rotational angular velocity of the DVD-RAM is set for each zone area so as to become faster in the zone on the inner peripheral side, and is kept constant while the optical pickup accesses in one zone. This increases the recording density of the DVD-RAM and facilitates rotation control during recording / reproduction.

FIG. 38B is an explanatory view in which the lead-in area, the lead-out area, and the zone areas 0 to 23 shown concentrically in FIG. 38A are arranged in the horizontal direction. The lead-in area and the lead-out area have a defect management area (DMA: Defect Management Area) therein. The defect management area refers to an area in which position information indicating the position of a sector in which a defect has occurred and alternative position information indicating in which of the above-mentioned alternative areas a sector replacing the defective sector exists are recorded. .

Each zone area has a user area inside thereof, and has an alternative area and an unused area at the boundary. The user area refers to an area that can be used as a recording area by the file system. The replacement area is an area used when a defective sector exists.
The unused area is an area that is not used for data recording.
An unused area is provided for about two tracks. The unused area is provided because the sector address is recorded at the same position on an adjacent track in the zone,
In the LV, since the recording position of the sector address is different in the track adjacent to the zone boundary, it is to prevent the sector address from being erroneously determined.

As described above, there are sectors not used for data recording at the zone boundaries. For this reason, the DVD-R is designed to continuously show only the sectors used for data recording.
AM is a logical sector number (LSN: Logicala) in order from the inner circumference.
l Sector Number) is assigned to a physical sector in the user area.

(1-2) Logical Structure of Optical Disk As shown in FIG. 38C, an area for recording user data, which is constituted by sectors to which LSNs are assigned, is called a volume space. In the volume area, digital data is managed and recorded by a file system conforming to the ISO / IEC13346 standard. At the beginning of the volume area, management information that constitutes a file system called volume structure information is recorded. The file system is index information for grouping and managing a plurality of sectors on the disk. Multiple sectors as a file
Group and manage multiple files as directories. It should be noted that, among the sectors in which the data constituting the file is stored, a group of sectors arranged continuously on the disk is managed as an extent. That is, data constituting a file is continuously recorded on the disk in extent units, but is recorded discretely on the disk as a whole file.

In the present embodiment, the optical disc has a directory / file structure shown in FIG. The data to be recorded is placed under a DVD_RTAV directory immediately below the ROOT directory as shown in FIG. Files are broadly divided into management information files and AV files.

The AV file is AR_A for recording audio.
UDIO. AR_ST for recording an ARO file and still image data to be displayed simultaneously when the audio data is reproduced
ILL. AR_EMD.ARO file and AR_EMD.Recording data distributed by the electronic music distribution system. ARO
There are three types of files.

The management information file is AR_MANGR. I
It is recorded as a file named FO, and stores management information for controlling reproduction of an AV file. In addition, a file having the same contents is written in AR_MANGR. Record as BUP.

FIG. 2 shows an AR_AU in which audio data is recorded.
DIO. It is a block diagram of an ARO file. As shown in FIG. 2, AR_AUDIO. The ARO file includes a plurality of AOBs (Audio Objects) having audio information.
Are arranged in the recording order. The audio information stored in the AOB includes LPCM data having a constant bit rate (CBR) and ML having a variable bit rate (VBR).
There is P type data.

The AOB has a data structure called a program stream of the MPEG system. An audio elementary stream having audio information and a text elementary stream having real-time text information are divided into a pack structure having a size of 2 KB. It has a multiplexed configuration.

FIG. 3 shows a pack packet structure of the MPEG system. A packet is a unit in which video and audio are multiplexed, and a packet is a minimum unit of transfer. As shown in FIG. 3, the pack header contains an SCR (System Clock Ref).
erence). SCR indicates the input timing at which the pack is input to the system decoder. That is, the transfer rate of data to the system decoder is defined by the SCR. DTS, PTS, and stream ID are stored in the packet header.

DTS (Decode time stamp) indicates the timing at which the pack is decoded by the decoder. PTS
(Presentation time stamp) indicates the timing at which the pack performs presentation such as audio output or video output. The stream ID is an identification code of an elementary stream in the program stream. In the case of a video elementary stream, “11000000” is added. In the case of AOB, the audio elementary stream and the text elementary stream are both private streams, and are assigned “10111101”.

As shown in FIG. 3, when the data type is audio data or real-time text data,
Since both are private streams, a substream ID is stored at the head of the data. In the case of real-time text data, "0100100"
"0" is stored, and in the case of audio data, "1010" is stored in the first 4 bits of the substream ID, and the lower 4 bits are an identification code of the audio coding type. “0000” is stored in the case of MLP, and “0001” is stored.

As shown in FIG. 2, the pack storing the audio elementary stream is called A_PCK (audio pack), and the pack storing the text elementary stream is called RTI_PCK (real-time information pack).

The AOB partial section is AOBU (Audio Obje
ct Unit). AOBU includes a plurality of A
_PCK is a unit having a certain fixed playback time of 1 second or less. However, the last AOBU of the AOB does not always have the same playback time as other AOBUs.

Here, the number of bits that can be stored in the A_PCK and the audio frame (Au
Since the number of bits of a dio frame (referred to as AF in the figure) does not generally match, one audio frame may be divided into a plurality of A_PCKs and recorded. However, the AOBU boundary is required to coincide with the audio frame boundary. This is to facilitate division and connection at the AOBU boundary during editing or the like.
For this purpose, padding is inserted into a part of the AOBU. RTI_PCK is used to record information such as lyrics displayed in synchronization with the reproduction of audio.

FIG. 4 shows AR_STILL. For recording still picture data displayed simultaneously with the reproduction of audio data. AR
It is a block diagram of an O file. As shown in FIG.
STILL. The ARO file includes AS, which is an MPEG program stream for a still image displayed simultaneously with audio.
VOBs (Audio Still Video Objects) are arranged in the recording order. ASVOB is one VOBU (Video Object U)
nit), and the VOBU is composed of a plurality of V_PCKs. The VOBU stores a GOP (Group of Pictures) defined by the MPEG standard.
Here, the feature is that it is composed of only one I picture.

FIG. 5 shows AR_EMD. Which records contents distributed by the electronic music distribution system. It is a block diagram of an ARO file. As shown in FIG. 5, AR_EM
D. In the ARO file, EMD contents, which are contents distributed by the electronic music distribution system, are arranged in the recording order. Although the internal data structure of the EMD content differs depending on the type of the electronic music distribution system, generally, the internal data structure often includes reproduction control information, copy control information, and audio data. The EMD content may store still image data for displaying a related image, text data for recording music lyrics, and the like.

(1-3-1) Relationship between AV Data and Management Information (Path Information That Defines a Playback Route) Next, the AR_AUDIO.
AOB stored in ARO and AR_STILL. AR
O and the ASVOB stored in AR_EMD. The EMD content stored in the ARO and the AR_MANGR. I
The relationship with the management information stored in the FO will be described.

AR_MANGR. The IFO management information includes path information defining an audio sequence composed of one or more AOBs, and A information indicated by the path information.
It includes map information for converting a cell, which is each section of the OB, into a recording address on the disk, and correspondence information for defining an EMD content corresponding to the AOB.

The audio sequence indicated by the path information is defined as a sequence of cells that are a partial section or an entire section of the AOB. As shown in FIG. 6, in a DVD, this sequence is called a PGC (Program Chain).
If the PGCs are different, different reproduction orders can be defined for the same AOB group. In the example of FIG. 6, PGC #
1 is AOB # 1, AOB # 2, AOB # 3, AOB #
4 shows a playback path having a playback order of PGC # 4.
Reference numeral 2 denotes a reproduction path having a reproduction order of AOB # 3, AOB # 2, and AOB # 4. PGC # 1 indicates an audio sequence composed of partial sections of each AOB, and PGC # 2 indicates an audio sequence composed of all sections of each AOB.

Each cell included in the PGC specifies an AOB section by time stamp information indicating a time at which audio is reproduced. That is, in the DVD, each section of the AOB is addressed by the elapsed playback time from the beginning. Audio sequences include original PGCs and user-defined PGCs.

As shown in FIG. 7, the original PGC refers to all the reproducible AOB sections in the disc as cells. The original PGC is a track set (Track
Set), which has a lower structure called a track (Track) in which a plurality of cells are logically bundled. In addition,
Here, the track does not mean the physical structure of the disk, but means one piece of music. This is naming due to the music industry custom of calling one song a track.

On the other hand, the user-defined PGC is obtained from the section of the AOB referenced by the original PGC.
An audio sequence consisting of a predetermined section specified by the user is defined. The cell of the user-defined PGC is a part or all of any cell of the original PGC,
It does not include an AOB section that is not referenced by the original PGC cell. The user-defined PGC is also called a play list (Play List), and one or more user-defined PGCs may exist.

In addition to the cell indicating the AOB section, the cell also indicates still picture data that is simultaneously displayed. As described above, the still image data is AR_STILL. It is stored in the ASVOB of the ARO file, and each cell points to this.

(1-3-2) Relationship 2 between AV data and management information (map information) Next, a map for converting the time stamp indicated by the cell of the user-defined PGC and the original PGC into a sector address on the disk. The information will be described. The management information includes an AOBUI as management information for each AOB. The AOBUI has AOB as shown in FIG.
Is stored as map information for converting the time stamp information indicating the section No. into a sector address on the disk. This map information is called AOBUI (AOB Unit Information).

The processing for converting the time stamp information into the sector address will be described below with reference to FIG. FIG. 9 is a diagram showing the relationship between AOB and AOBUI. As described above, the AOB is composed of a plurality of AOBUs. The size of AOBU is fixed bit rate (C
BR) constant, but variable bit rate (VBR)
If so, it is variable. Therefore, in order to convert the time stamp indicating each section of the AOB into an actual sector address, it is sufficient that each AOBU has the size and its reproduction time.

The reproduction time length is described by a numerical value when 1 second is set to 90000. For example, according to this description, 0.
Eight seconds is described as 72000. Each AOBU is A
Except for the last AOBU of the OB, it has a certain playback time. Therefore, the Duration of FIG.
Duration of AOBU # from AOBU # 1
In fact, the same value is stored in n-1. On the other hand, the size of AOBU is described by the number of sectors. This is A_PCK that constitutes AOBU
And the sum of the number of RTI_PCKs.

Now, a time search process will be described as an example of a process related to conversion from time stamp information to an address. The time search is a function of starting playback from a specific time in one song. In order to realize such a function, it is necessary to convert a specified specific time stamp information into an address. For this purpose, first, the designated time information is divided by the reproduction time information indicated by Duration of AOBU # 1. AOBU including a time stamp corresponding to a specific time is obtained by adding 1 to the quotient obtained in this manner. The number of this AOBU is defined as i. To find the address of this AOBU, the first AOBU
The sizes from the BU to the (i-1) th AOBU may be summed. The value thus obtained is the address to be obtained.
In order to convert the address information thus obtained into a final sector address, the AR_AUDI of the corresponding AOB is further required.
O. It is necessary to add offset information in the ARO file. This offset information is used as management information for each AOB as AR_MANGR. It is stored in the IFO file.

Since the AOBU has a reproduction time of 1 second at the maximum, the accuracy of the time search is at most 1 second in the method described above. In order to further improve the accuracy, a time search may be further performed in audio frame units in the specified AOBU. The playback time length of each audio frame is determined according to the encoding method used for encoding the audio. For example, in the AC3 system, it is 32 msec. By utilizing this, it is also possible to perform a time search with the accuracy of an audio frame. By configuring the AOBUI from the size of each AOBU and the reproduction time length information as described above, it becomes possible to convert each section of the AOB indicated by the time stamp into a sector address on the disk.

(1-3-3) Relationship 3 between AV Data and Management Information (Corresponding Information) Next, the corresponding information for associating the AOB with the EMD content will be described. The inside of the AOB has a data structure determined as described above, and the encoding method of the stored audio data is either the LPCM method or the MLP method.
Only the method. As a result, the disk reproducing apparatus only has a function of processing a predetermined data structure and a decoding function of the LPCM system and the MLP system, and can always reproduce the data. This is convenient for realizing reproduction compatibility by a consumer device that can only implement a limited function, and conversely, the existence of AOB is a suitable method for realizing reproduction compatibility. Therefore, here, it is assumed that the AOB always exists for one music piece.

On the other hand, although the internal data structure of the EMD content is defined for each electronic music distribution system, the types are extremely large, and the data structure and information of the information for reproduction control are stored. The encoding methods of the audio data are different from each other. For this reason, it is very difficult for a consumer device to play back all EMD contents by all playback devices. However, the existence of the EMD content is very effective for realizing the function unique to the electronic music distribution system.
It is very convenient to do such. Therefore, here, it is assumed that an EMD content may exist for a certain song.

It should be noted that the material from which the DVD recorder records is not limited to the electronic music distribution system. It is also possible to create a copy from a CD or DVD-Audio using SCMS or CPPM, which is a conventional generation-managed copy. In such a case, the EMD content does not necessarily exist for a certain song. In the case of EMD content, it is also assumed that a plurality of songs exist inside one EMD content. For example, when music is distributed in album units, the distributed data is treated as one unit.
There are multiple songs inside.

Based on this background, AOB and EMD
FIG. 10 shows the relationship between the contents and the data structure. AOB is AR_AUDIO. Arranged in the ARO file in the recording order, and the EMD content is AR_EM
D. They are arranged in the ARO file in the recording order. An EMD
There is always one or more corresponding AOBs in the content. For example, in the figure, AOB1
And AOB2 correspond, and EMD content 2 has AOB
4 corresponds. Also, there may be AOBs for which there is no corresponding EMD content. For example, in the figure, AOB3 does not have a corresponding EMD content.

In order to store the correspondence information between the AOB and the EMD content as described above, there is EMDI as management information for each AOB. FIG. 11 is a diagram showing a data structure of EMDI. EMD_TY · E for EMDI
MD_ID, EMD_SA, EMD_EA, EMD_T
Five pieces of information of K_NO are recorded.

EMD_TY which is the first information has EMD
_TY1 and EMD_TY2 are recorded. FIG. 12 is a diagram showing a data structure of EMD_TY. In EMD_TY1, information indicating whether or not the EMD content corresponding to the AOB exists is described according to the following description format. 0b: Corresponding EMD content does not exist 1b: Corresponding EMD content exists On the other hand, EMD_TY2 has the following description format indicating whether or not the corresponding EMD content is associated with two or more AOBs. It is described according to. 0b: Corresponding EMD content corresponds only to the AOB 1b: Corresponding EMD content corresponds to a plurality of AOBs The second information, EMD_ID, describes information for identifying the type of the EMD content. . The player and the recorder use the EMD_ID to record the recorded E
The type of the MD content is determined, and processing such as reproduction and copying is performed. This is because the data format of the EMD content used therein differs depending on the type of the electronic music distribution system, and it is necessary to identify the type of the data format.

EMD_SA which is the third information has EMD
AR_EMD. Address information in the ARO file is recorded.

EMD_EA which is the fourth information has EMD
AR_EMD. Address information in the ARO file is recorded.

In the EMD_TK_NO, which is the fifth information, when the EMD content is associated with a plurality of AOBs, the number of the song corresponding to the AOB is recorded in the EMD content. .

Here, it is assumed that five pieces of information are recorded in the EMDI, but in addition to this, the start address / end address of the reproduction control information in the EMD content, the start address / end address of the audio data, and the copy address The start address and the end address of the control information may be recorded. Also, here, one AOB and EMD content correspond, but EMD content may correspond to one PG (described later).

(1-4) Management Information File Next, a management information file “AR” will be described with reference to FIGS.
_MANGR. IFO "will now be described.

"RTR_AMG" (FIG. 13) AR_MANGR. In the IFO file, RTR_AM
Management information called G (real-time recording audio management) is recorded. This RTR_AMG is the RTR
_AMGI, A_AVFIT, ORG_PGCI, UD
_PGCIT, TXTDT_MG, and MNFIT.

RTR_AMGI records management information on the entire DVD-RTAV directory, such as a pointer to a subsequent table. A_AVFIT is
Attribute information on the audio file and the still image file, such as the encoding method, is recorded. ORG_PGC
I and UD_PGCIT store information relating to the playback path of AOBs constituting an audio file and ASVOBs constituting a still image file. Also, TXTDT_M
G is management information relating to text, and MNFIT is information that is uniquely defined by a manufacturer of the audio recorder.

Next, details of each table constituting RTR_AMG will be described.

(1-4-1) RTR_AMGI Table RTR_AMGI (real-time recorded audio management information) is a first table of management information RTR_AMG, and is composed of AMGI_MAT and PL_SRPT.

First, the AM constituting RTR_AMGI
GI_MAT will be described. A of RTR_AMGI
MGI_MAT (Audio management information management table)
As shown in FIG. 14, AMG_ID, RTR_AMG_EA, and AMGI_
EA, VERN, TM_ZONE, CHRS, RSM_
MRKI, DISC_REP_PICTI, DISC_
REP_NM, A_AVFIT_SA, UD_PGCI
T_SA, ORG_PGCIT_SA, TXTDT_M
Fourteen pieces of information of G_SA and MNFIT_SA are recorded.

AMG_ID as the first information is an audio management identifier. In the case of the present invention, an identifier "DVD_RTR_AMG0" indicating that audio recording data is recorded is recorded on this disc.

RTR_AMG_EA, which is the second information, records the end address of RTR_AMG.

AMGI_EA which is the third information contains AM
The end address of the GI is recorded.

In the VERN which is the fourth information, the version number of the recording format of the audio recording data is recorded according to the format shown in FIG.

In the fifth information TM_ZONE, a time zone used by all date and time information recorded in the disc is recorded in a format shown in FIG.
TM_ZONE records the time difference between TZ_TY (time zone type) indicating whether the standard of date and time information is Greenwich Mean Time, which is universal time, or standard time of each region, and Greenwich Mean Time.
OFFSET (time zone offset).

The character set code for the primary text described later is recorded in the CHRS as the sixth information.

RSM_MRKI which is the seventh information includes:
When the reproduction is interrupted by the user, resume information for starting the reproduction from the place where the reproduction was interrupted is recorded in the format shown in FIG. RSM_MRK
I is the PGC of the place where the reproduction was interrupted as shown in FIG.
M indicating the number, PG number, Cell number, and location in the Cell in a PTM description format (FIG. 19) described later
RK_PT and MRK_TM indicating the time when the resume marker information was created in the description format shown in FIG.
It is composed of

DISC_REP_PI which is the eighth information
Disk representative still image information is recorded in the CTI.

DISC_REP_NM which is ninth information
Records text information indicating the contents of the disc. This text information includes a field for an ASCII code and a field for a character code set specified by the CHRS described above.

A_AVFIT_SA which is the tenth information
The start address of A_AVFIT is recorded in
UD_PGCIT_SA, which is the information of
The start address of the IT is recorded, and the twelfth information O
In RG_PGCIT_SA, the start address of ORG_PGCI is recorded, and TXTDT_M
The start address of TXTDT_MG is recorded in G_SA, and the MNFI_SA that is the fourteenth information is MNFI_SA.
The start address of T is recorded. The player and the recorder can first read the AMGI_MAT to obtain rough configuration information of the disc.

Next, PL_S constituting RTR_AMGI
The RPT will be described. PL_S of RTR_AMGI
The RPT (playlist search pointer table) records access information to each playlist. RTR_A
The MGI has a table format including PL_SRPTI and n PL_SRPs as shown in FIG.

PL_SRPTI (playlist search pointer table information) includes PL_SRP_Ns indicating the number of PL_SRPs in order to access PL_SRP.
And PL_SRP indicating the end address of PL_SRPT
T_EA is recorded. In addition, PL_SRP (playlist search pointer) includes a user-defined PGC that is the actual data of the playlist,
PL_TY (playlist type), PGCN (PGC
No.), PL_CREATE_TM (playlist recording date and time), PRM_TXTI (primary text information), IT_TXT_SRPN (IT_TXT_SRP)
No.) and REP_PICTI (representative still image information).

The following information for accessing the user-defined PGC, which is the actual data of the playlist, is recorded in the first information, PL_SRP (playlist search pointer).

In the PL_TY (playlist type) as the second information, one of the following values is recorded in accordance with the description format shown in FIG. 18 as a value for identifying the type of the playlist. 1000b: sound only (including still image displayed simultaneously with sound) In the PGCN (PGC number) which is the third information, the number of the PGC corresponding to this playlist is recorded.
The PGC number is a PGC in UD_PGCIT described later.
This is the order of recording information.

PL_CREATE_T as fourth information
In M (playlist recording date and time), date and time information when the playlist was created is recorded according to the description format shown in FIG.

[0086] In PRM_TXTI (primary text information), which is the fifth information, text information indicating the contents of this playlist is recorded. For example, when a television program is recorded, the program name is recorded. The primary text information includes a field for an ASCII code and a field for a character code set specified by the CHRS described above.

IT_TXT_SRPN as sixth information
In the (IT_TXT_SRP number), in addition to the above-described primary text, when information indicating the contents of the playlist is optionally recorded as IT_TXT, the number of IT_TXT_SRP is provided as link information to IT_TXT recorded in TXTDT_MG. Has been recorded. The IT_TXT_SRP number is T
This is the recording order in XTDT_MG.

[0088] In REP_PICTI (representative still picture information) as seventh information, information on a still picture representing this play list is described.

(1-4-2) A_AVFIT Table A_AVFIT is a second table of management information RTR_AMG. A_AVFIT (audio AV file information table) includes an audio file “AR_AUDI”.
O. ARO "and audio still video file" AR "
_STILL. ARO "is recorded.

A_AVFITI, which is header information, and AUD_, which is management information of a stream included in the audio file, as management information for the audio file.
AUDI which is management information of AOB included in the STI and the audio file is recorded. As management information for audio still video files, ASV
_STI and ASVFI are recorded.

First, A_AVFIT which is header information
I will be described. A_AVFITI (audio AV file information table information) is header information.
As shown in A, the following information AUD_STI, A
Information necessary for accessing UDFI, ASV_STI, and ASVFI is recorded. Specifically, AUDF
I_Ns, ASVFI_Ns, AUD_STI_Ns,
AUD_STI_Ns, ASV_STI_Ns, A_A
Six pieces of information of VFI_EA are recorded.

AUDFI_Ns (the number of pieces of audio file information), which is the first information, contains the number of AUDFIs as "
“0” or “1” is recorded, and this value also corresponds to the number of audio files, that is, the presence or absence of the AR_AUDIO.ARO file.

ASVFI_Ns (A
“0” or “1” is recorded as the number of ASVFIs in the “number of SV file information”. This value is the number of audio still video files, that is, AR_STILL. ARO
It also supports the existence of files.

AUD_STI_Ns, which is the third information
The (number of audio object stream information) records the number of AUD_STI entries to be described later.

ASV_STI_Ns which is the fourth information
In (the number of audio still video stream information), the number of entries of ASV_STI described later is recorded.

A_AVFI_EA which is the fifth information
(Audio AV file information end address) includes A
The end address of _AVFI is recorded.

Next, AUD_STI, which is management information of a stream included in an audio file, will be described. AUD_STI indicates an attribute of a stream included in an AOB constituting an audio file in a format shown in FIG. AUD_STI exists as many as the number of streams included in AOB. Note that the audio file is composed of one or more AOBs, but since each AOB has a common stream configuration, AUD_STI stores one set of information common to all AOBs.

AUD_STI (audio stream information) includes A_ATR and TXT_ATR.
_ATR describes attribute information of audio recorded in AOB, and TXT_ATR describes attribute information of text recorded in AOB.

The A_ATR of AUD_STI (audio stream information) has an Audio coding mode and a Quant according to the format shown in FIG.
Ization, fs, Number of Audi
Attribute information of four audios of o channels is recorded.

The first audio attribute “Audio co
As the “ding mode”, one of the following values for identifying an audio encoding method is recorded.

000b: LPCM 001b: MLP As the second audio attribute “Quantization”, the following value for identifying the quantization is recorded.

00b: 16 bits 01b: 20 bits 10b: 24 bits As the third audio attribute “fs”, the following value for identifying the sampling frequency is recorded.

00b: 48 Khz 01b: 96 Khz 10b: 192 Khz The fourth audio attribute “Number of Audi”
As “o channels”, one of the following values for identifying the number of audio channels is recorded.

0000b: 1 channel (monaural) 0001b: 2 channels (stereo) 0010b: 3 channels 0011b: 4 channels 0100b: 5 channels 0101b: 6 channels TXT of AUD_STI (audio stream information)
_ATR has va according to the format shown in FIG.
The attribute information of two texts, ie, “lightness” and “CHRS” is described.

First text attribute “validity”
In the AOB, a value indicating whether or not text information is described in RTI_PCK in the AOB is recorded according to the following.

0b: Valid text information does not exist in RTI_PCK. 1b: Valid text information exists in RTI_PCK. As the second text attribute “CHRS”, RTI_P
One of the following values for identifying the character code of the text information recorded in the CK is recorded.

00h: ISO / IEC 646: 1983 (AS
CII) 11h: ISO 8859-1: 1987 15h: Music Shift JIS Next, one or more AOBs included in the audio file
AUDFI indicating each piece of management information will be described. AUDFI (Audio File Information)
AUDFI_GI, AOBI_SRP, A necessary information for accessing AOB in the format shown in FIG.
It is composed of OBI.

AOBI is management information that exists as many as the number of AOBs constituting an audio file. AOBI_S
RP is pointer information to AOBI, and the corresponding AO
The starting address of BI is indicated as AOBI_SA.
AUDFI_GI indicates the number of AOBI_SRP.

The data structure of AOBI will be described in detail below. The AOBI includes AOB_GI, which is general information, EMDI, which is correspondence information, and AOBUI, which is map information, as shown in FIG. AOB_GI (AOB
In the general information, the following seven pieces of information are recorded as AOB general information.

The first general information AOB_TY (AO
B type), three pieces of information of TE, SAB, and MT_FLG are recorded according to the format shown in FIG.

One of the following values for identifying the state of the AOB is recorded in the TE.

0b: Normal state 1b: Temporary erasure state In the SAB, any of the following values for identifying whether or not this AOB has the same content as the immediately preceding AOB is recorded.

0b: Data different from the immediately preceding AOB is recorded in the AOB. 1b: The same data as the immediately preceding AOB is recorded in the AOB. The same content is recorded a plurality of times. Is based on the assumption of a move operation. That is, a DVD disk which is a large-capacity medium is expected to be used as a music library taking advantage of its characteristics. Such usage and MO
If the copying by VE is combined, it is assumed that a DVD disk is used as a library, and music data on the DVD disk is moved to a medium suitable for portable use such as a flash memory by a method such as MOVE and viewed. You. However, in the move, the music data is lost from the original media. Therefore, by recording a plurality of music data on the same medium, even if one of them is moved to another medium, it is possible to reproduce the original music on the remaining music data. In such a case, the flag indicating the same among a plurality of music data is SAB.

In the MT_FLG, one of the following values for identifying whether or not this AOB is reproduced with the immediately preceding AOB without sound interruption is recorded.

0b: There is a possibility that a silent section is inserted after the immediately preceding AOB playback is completed and before the start of the AOB playback. 1b: After a previous AOB playback is completed and a silent section is inserted before the start of the AOB playback. In the second general information AOB_REC_TM (AOB recording date and time), the date and time when this AOB was recorded is recorded in the same format as PL_CREATE_TM shown in FIG. What is important here is that the recording date is AOB
This indicates the recording date and time of the first displayed audio frame. When the AOB first audio frame is replaced by editing or partial erasing, this AOB_REC_
The TM also has to be corrected.

AOB_REC_T which is the third general information
M_SUB (AOB recording date / time difference information) includes AOB_REC_TM which is modified when AOB first audio frame is replaced by editing or partial erasing of AOB.
This is a field in which information for absorbing the error of is stored. As shown in FIG. 18, AOB_REC_TM has only information up to the date, month, day, hour, minute, and second. Therefore, when editing or erasing with frame or field accuracy,
Since AOB_REC_TM alone cannot provide sufficient recording accuracy, a fraction is recorded using this field.

AUD_STIN which is the fourth general information
(AUD_STI number) includes A corresponding to this AOB.
The UD_STI number is recorded. A shown here
The UD # STI number is a recording order in the above-described AUD_STI table.

AOB_A_S_P which is the fifth general information
TM (AOB audio start PTM) contains this AOB
Is recorded at the same reference time as the time stamp in the stream.

AOB_A_E_P which is the sixth general information
TM (AOB audio end PTM) contains this AOB
Is recorded at the same reference time as the time stamp in the stream. It should be noted here that the time stamp in the stream indicates the display start time of the frame, but the AOB_A_E_PTM records the display end time, that is, the time obtained by adding the display period of the frame to the display start time. You.

SCR_DIFF which is the seventh general information
In (SCR difference), a value obtained as a result of the following calculation in the immediately preceding AOB and the AOB is described.

SCR_DIFF = ((P_PTS + PTS1) − (P_SCR + SCR1)) − (S_PTS−S_SCR) P_PTS: PTS of the last audio frame of the immediately preceding AOB P_SCR: SCR of the last pack of the immediately preceding AOB SCR S_PTS of the AOB of the AOB PTS S_SCR: SCR of the first pack of the AOB PTS1: Playback time length of one audio frame SCR1: Time required to read one pack EMDI (EMD information) is described in (1-3-3). Therefore, the description here is omitted.

As shown in FIG. 24, AOBUI is composed of AOBU_GI which is header information, and AOBU_ENT which is present by the number of AOBUs. However, AOBU
_ENT exists only when the target AOB stream is the MLP, and does not exist when the target AOB stream is the LPCM. AOBU
In _GI (AOB general information), the following six pieces of information are recorded as AOBU general information.

AOBU_PB_T, which is the first general information
In M (AOB unit playback time length), a common playback time length of the AOB unit except the last in the AOB is recorded.

The second general information, AOBU_SZ (A
OB unit size) records the size of the AOB unit. However, when the audio stream included in the target AOB is audio data of the MLP system, since the size of each AOB unit is not constant,
0 is recorded in AOBU_SZ.

L_AOBU_PB as third general information
_TM (last AOB unit playback time length) contains AOB
The playback time length of the last AOB unit is recorded.

L_AOBU_SZ as fourth general information
In (final AOB unit size), the size of the last AOB unit in the AOB is recorded.

AOBU_ENT_ which is the fifth general information
Ns (the number of AOB unit entries) includes AO
Record the number of fields of the B unit entry. AOB
AOBU_ENT is not recorded when the audio stream included in is audio data of the LPCM system. Therefore, 0 is recorded in AOBU_ENT_Ns.

The sixth general information AOBU_SA (A
In the OB start address), an offset value in the AV file at the head of the AOB is recorded.

Next, AOBU_ENT will be described.
As shown in FIG. 25, AOBU_ENT (AOBU entry) indicates the data amount of the corresponding AOBU.
BU_SZ is recorded.

"ASV_STI""ASVFI" While AUD_STI and AUDFI are management information on audio data,
_STI and ASVFI are management information regarding still image data. Since these details are irrelevant to the spirit of the present invention, the description is omitted.

"UD_PGCIT" (FIG. 26) UD_PGCIT (user-defined PGC information table)
Are UD_PGCITI, UD_PGCI_SRP, U
D_PGCI.

"UD_PGCITI" (FIG. 26) UD_PGCITI (user-defined PGC information table information) records the following information constituting the user-defined PGC information table.

UD_PGCI_SRP_Ns (number of user-defined PGC information search pointers) The number of UD_PGCI_SRP is recorded.

UD_PGCIT_EA (user-defined PG
C information table end address) The end address of UD_PGCIT is recorded.

[UD_PGCI_SRP] (FIG. 26) UD_PGCI_SA is recorded in UD_PGCI_SRP (user-defined PGC information search pointer).

UD_PGCI_SA (User-defined PGC
(Information start address) In UD_PGCI_SA, the start address of UD_PGCI is recorded. When accessing this PGCI,
It is only necessary to seek to the recorded address.

"UD_PGCI" (FIG. 26) The details of UD_PGCI (user-defined PGC information) will be described later in PGCI.

"ORG_PGCI" (FIG. 13) Details of ORG_PGCI (original PGC information)
This will be described with PGCI described later.

"TXTDT_MG" (FIG. 13) This is irrelevant to the gist of the present invention, and the description is omitted.

“PGCI” (FIG. 27) PGCI (PGC information) is composed of ORG_PGCI, UD_
PGCI has a common data structure, and PGC_GI, P
GI, CI_SRP, and CI.

"PGC_GI" (FIG. 27) PGC_GI (PGC general information) is composed of PG_Ns and CI_SRP_Ns as general PGC information. The individual fields are as follows.

PG_Ns (number of programs) The number of programs in this PGC is recorded.

CI_SRP_Ns (the number of CI_SRPs) The number of CI_SRPs described later is recorded.

“PGI” (FIG. 27) PGI (program information) includes PG_TY, C_Ns,
PRM_TXTI, IT_TXT_SRPN, REP_
PICTI. The individual fields are as follows.

PG_TY (program type) The following information indicating the status of this program is recorded using the format shown in FIG.

Protect (Protect) 0b: Normal state 1b: Protected state C_Ns (number of cells) The number of cells in this program is described.

PRM_TXTI (Primary Text Information) Text information indicating the contents of this program is recorded. Details are the same as PRM_TXT described above.

The IT_TXT_SRPN (IT_TXT_
(SRP number) REP_PICTI (representative still image information) These are irrelevant to the gist of the present invention, and thus description thereof is omitted.

"CI_SRP" (FIG. 27) The CI_SRP (cell information search pointer) records address information for accessing this cell information.

CI_SA (Cell Information Start Address) The start address of this cell information is recorded. When accessing this cell, it is sufficient to seek to this address.

"CI" (FIG. 29) CI (cell information) is composed of C_GI and C_EPI.

“C_GI” (FIG. 29) C_GI (cell general information) has the following basic information that constitutes a cell.

C_TY (cell type) The following information for identifying a voice cell is recorded in the format shown in FIG.

C_TY1 010b: voice cell AOBI_SRPN (AOB information search pointer number) The search pointer number of the AOB information corresponding to this cell is recorded. When this cell accesses the corresponding stream data, first the AOB indicated by this field
Access the information search pointer number.

ASVUI_SRPN (ASV unit information search pointer number) ASV_DMOD (ASV display mode) C_EPI_Ns (number of cell entry point information) Since these are irrelevant to the purpose of the present invention, the description is omitted.

C_A_S_PTM (cell audio start time) The reproduction start time of this cell is recorded in the format shown in FIG.

C_A_E_PTM (cell audio end time) The reproduction end time of this cell is recorded in the format shown in FIG. C_A_S_PTM and C_A_E_P
The valid section of the cell in the AOB to which this cell corresponds is specified using TM.

"C_EPI" This is irrelevant to the gist of the present invention, and a description thereof will be omitted.

(Configuration of DVD Recorder) Next, the configuration of the DVD recorder will be described with reference to FIG. In the figure,
2601 a user interface (U / I) unit for displaying to a user and receiving a request from the user;
Is a system control unit for overall management and control, 2603
Is an input unit for inputting video and audio including an AD converter, 2604 is an encoder unit, 2605 is an output unit for outputting video and audio, 2606 is a decoder unit for decoding an MPEG stream, 2607 is a track buffer, and 2608 is a drive It is.

(Conventional Copy Operation of DVD Recorder) Next, a conventional copy operation of the DVD recorder will be described. This is a recording operation in which an analog input is AD-converted into a digital stream, or a recording operation when a digital stream is input via a digital cable or a digital bus such as IEC958. When the recording start operation is received by the user of the apparatus, the DVD recorder first stores the management information recorded in the ROOT directory of the disc in the AR_MANGR. Reads an IFO file. The system controller reads the AR read here
_MANGR. The contents of the IFO file are stored in an internal memory. At the time of recording, it is preferable from the viewpoint of processing that the management information is temporarily expanded on the memory in this way, and after the change accompanying the recording is performed, the information is written back to the disk.

(Additional operation of AOB) The system control section inputs the input digital audio stream to the encoder section and converts it into a program stream defined by the MPEG standard. When recording is performed by the MLP method, the input digital audio stream is further compressed and then converted into a program stream. The program stream created in this way is AR
_AUDIO. It is recorded at the end of the ARO file. The details of the compression method of the digital audio stream and the conversion method to the program stream are irrelevant to the gist of the present invention.
I omit the explanation.

(AOBI Update Operation) Next, the system control unit reads the AMGI_M from the management information expanded on the memory.
A_AVFIT_SA in AT is referred to, A_AVFIT_SA
Access IT. AUD in A_AVFIT
Search for _STI. Here, if attribute information that matches the audio stream to be recorded this time already exists, AUD_STI is not newly added.
On the other hand, when recording is performed with an audio stream attribute (frequency, number of quantization, number of channels, coding scheme) of a combination that does not yet exist, the system control unit adds a new AUD_STI, and further adds AUD_STI_N
Increase s by one.

Next, for the newly recorded AOB, the system control unit newly creates AOBI, which is management information thereof. For this, the AUDF in A_AVFIT
I, and first, AOBI in AUDFI_GI
Increase the number of _SRP_Ns by one. Further, a new AOBI_SRP is created. A which is newly created here
OBI_SRP is address information for a newly created AOBI.

Further, the system control unit creates information relating to the inside of the AOBI. The system control unit, based on information when the encoder unit created the program stream,
Create AOBGI and AOBUI. Regarding the remaining EMDI, information in which all 0s are set in the case of the conventional copy is created. EMD created in this way
I means that there is no EMD content corresponding to the AOB.

(Update operation of PGCI) Next, the system control unit responds to the newly added AOB by using ORG_PG
Update the CI. Here, the processing when one new piece of music is added will be described. When a plurality of music pieces are continuously added, this can be realized by performing the processing for one music piece a plurality of times. The system control unit first accesses the ORG_PGCI based on the information of the ORG_PGCI_SA in the RTR_AMGI. First, O
PG_Ns existing in PGC_GI in RG_PGCI
And the number of C_Ns is increased by one. It is assumed that one song is composed of a plurality of AOBs. In this case, however, C_Ns is increased by the number of AOBs constituting the song.

Next, the system control unit newly adds PGI · C
Add I · CI_SRP. In the newly added CI, various information is set so as to refer to the newly added AOB. The details of the PGI / CI / CI_SRP creation are irrelevant to the gist of the present invention, and thus the description thereof is omitted. The system control unit updates various types of address information as needed. This is a new AO
This is a process associated with the addition of BI and PGI • CI • CI_SRP.

(Playback Operation of DVD Recorder)
The reproduction operation of the D recorder will be described. The data on the DVD-RAM recorded by the DVD recorder is
It can be read again by the DVD recorder and reproduced. When the operation of starting reproduction is received by the user of the apparatus, the DVD recorder first stores the management information recorded in the ROOT directory of the disc in the AR_MANGR. Reads an IFO file. The system controller reads the read AR_M
ANGR. The contents of the IFO file are stored in an internal memory. Next, the system control unit executes the AMGI shown in FIG.
Check AMG_ID and VERN in _MAT. Here, when information different from the information originally supposed to be stored in these information is recorded, this disc is regarded as a disc that cannot be reproduced by the DVD recorder, and the reproduction is not performed.

Next, the system control unit executes ORG_PGCI
_SA with reference to _SA. Since the recording position of ORG_PGCI is stored in ORG_PGCI_SA, ORG_PGCI_SA can be obtained by referring to the designated address in the management information read and placed earlier.
It is possible to refer to the CI.

(Playback operation according to PGCI) Here, the system control unit refers to the PGCI and plays back a series of audio. Hereinafter, an operation when performing reproduction using PGCI will be described. First, the system control unit
Reference is made to PG_Ns described in I_GI. PG
_Ns describes the number of PGs.
It matches the number of PGIs included in I. Here, since the data length of the PGI is a fixed length, the data length of the entire PGI can be obtained by multiplying the number of PGs by the data length of the PGI. This makes it possible to obtain the head address of the CI_SRP by skipping the fixed length PGC_GI and the data length of the PGI from the head of the PGCI.

[0170] PGI includes Cell contained in PG.
Is described, and one Cell is always included in only one PG, and the description order of the information about the Cell is equal to the description order of the PG including the Cell. CI_SRP
It is possible to access Further, CI_SR
Since P describes CI_SA necessary for accessing the CI, the system control unit can refer to the CI based on this information.

(AOB Reproduction Process) Next, the AOB reproduction process will be described. The reproduction of AOB is performed sequentially while reading from the medium. For this reason, it is necessary for the system control unit to determine from which position in the medium the reading should be started at the time of reproduction and to which position the reproduction should be performed.

For this, AOBI_S in C_GI is used.
Use RPN and C_A_S_PTM and C_A_E_PTM. First, the system control unit refers to the AUDFI stored in the memory. First, the system control unit refers to AOBI_SRP in AUDFI. Here, the AOBI_SR in a plurality of AOBI_SRPs
The AOBI_SRP of the number indicated by PN is referred to. Since AOBI_SA is described here, AOBI_SA
It is possible to refer to BI. Next, the system control unit refers to the C_A_S_PTM, and based on this information, determines the address at which reproduction is to be started in AR_AUDIO. Determine where it is in the ARO file.

The method of determining the address will be described below with reference to the flowchart shown in FIG. S27
01, the difference between C_A_S_PTM and AOB_A_S_PTM described in AOB_GI is calculated,
Divide by AOBU_PB_TM described in BU_GI,
Seeking that quotient. Let this quotient be AOBU_Ns. Next, in S2702, the process branches depending on whether the encoding method of the audio data included in the target AOB is the MLP method or the LPCM method. If it is the MLP method, the process transitions to S2703. S270
In 3, the AOBU_EN described in the AOBUI
AOBU obtained in S2701 from T first in T
AOBU_SZ in AOBU_ENT up to _Nsth
Find the sum of The sum of the sum and AOB_SA is the start address of the AOBU including the C_A_S_PTM to be obtained.

Next, in the case of the LPCM system, S270
The process branches to 4. In S2704, first, S270
AOBU_Ns obtained in 1 is multiplied by AOBU_SZ described in AOBU_GI, and AOBU_SA described in AOB_GI is added thereto. The value obtained in this manner is the start address of the AOBU including the desired C_A_S_PTM. Thus, the address at which the reproduction is to be started is obtained.

By the way, when the reproduction is started from the start address of the AOBU obtained in this way, AOBU_PB_
A time error corresponding to the size of TM occurs. In order to avoid this, the first P
It is required that the audio frames corresponding to the difference of C_A_S_PTM from the TS are skipped and reproduced.

By the method described above, the reproduction start point of AOB can be accurately determined. Similarly,
It is also possible to obtain the reproduction end point of AOB using C_A_E_PTM. In this way, the obtained reproduction start address to reproduction end address are sequentially read from the medium, and the read data is sequentially sent to the audio output unit. The audio output unit receives these data, determines the attribute of the received data based on the AUD_STI information passed from the system control unit, and reproduces the data. Note that the method of acquiring AUD_STI is ASV_ST
It is the same as the method used when acquiring I. AO
The method of outputting the actual sound from the B data is irrelevant to the gist of the present invention, and thus the description is omitted.

(Operation 1 for Recording EMD Content of DVD Recorder) Next, the operation when the content distributed by electronic music distribution is recorded on a disc by the DVD recorder will be described. In the case of distribution by electronic music distribution, various methods are assumed as an input method in the input unit. For example, the input unit has some communication means, communicates with a server on a network by this communication means, and receives contents as a result. The input unit includes an antenna tuner, and can record contents distributed by broadcasting. The input unit may be a drive of an optical disk or a reader of a flash memory, and may receive a content existing on another medium such as an optical disk or a flash memory as an input.

When such EMD content is recorded, at least AOB recording is also performed. This is because by recording the AOB, all D
This is for ensuring reproduction compatibility with the VD player. In the following, first, a description will be given of a portion of the AOB recording operation that is different from that of the conventional copy operation.

(AOB Addition Operation) In a conventional copy, the input unit has accepted a digital audio stream. This is because when recording is performed by the LPCM method, conversion into a program stream may be performed directly.
In the case of recording by the LP method, it means that it is sufficient to convert the data into a program stream after performing compression. On the other hand, when recording EMD content, data received by the input unit is EMD content. The EMD content is composed of reproduction control information, audio data encoded by a compression encoding method, and the like. The system control unit acquires reproduction control information from the EMD content received by the input unit, and acquires audio data based on the information stored therein.

[0180] The audio data thus obtained is input to the decoder section. The decoder decodes the audio data encoded by the compression encoding method and expands the audio data into an uncompressed digital audio stream. The uncompressed digital audio stream created in this way is input to the encoder unit, converted into a program stream as in the case of the conventional copy, and AR_AUD
IO. Recorded in ARO. If the input content is an album and is composed of a plurality of songs, an AOB is created for each song.

(AOBI Update Operation) The operation is almost the same as that of the conventional copy, but the processing related to EMDI is different. In the conventional copy, since the corresponding EMD content is not recorded, the value of all EMDI is set to 0. On the other hand, when recording the content distributed by the electronic music distribution system, the EMD content is recorded together with the AOB for reproduction compatibility. For this purpose, EM that associates AOB with EMD content
Significant information is also stored in the DI. Now, the system control unit searches for an address to which the EMDI is added in the same manner as in the conventional copy. A new EMDI is created for the address thus found.

EMD_TY1 is always set to 1b.
For EMD_TY2, 0b is set when the input content is one song, and 1b is set when the input content is an album. EMD_ID is the input EMD
Information for identifying the content is set. EMD
In the _SA and the EMD_EA, address information of the recording destination of the EMD content is set based on the processing result at the time of the EMD content adding operation described later. Regarding EMD_TK_NO, if the input content is one song, 0 is set. If the input content is an album, AOB corresponding to each song is set.
A continuous numerical value is set from 1 for each I.

(Update operation of PGCI) This is the same as the case of the conventional copy.

(Operation for Adding EMD Content) The system control unit converts the data of the EMD content received by the input unit into the AR_EMD. Record at the end of the ARO file.

(Operation 2 for Recording EMD Content of DVD Recorder) Next, the EMD content on the disc is
The operation when the recorder copies data to another medium by a method such as MOVE will be described. Here, a case where MOVE is performed to a flash memory will be described as an example. When performing MOVE, it is more efficient to copy using EMD content as a source, instead of copying using AOB as a source. There are two reasons for this.

The first reason is a problem relating to the quality of contents. For example, assume that the EMD content distributed by the electronic music distribution system has AAC audio data. If this is recorded as AOB, it is converted to LPCM or MLP. If this AOB is used as the source of the copy, it may be necessary to recompress it when copying to another medium. In particular, a medium such as a flash memory has a limited medium capacity as compared with a DVD, and it is essential to compress and record audio data. Performing such recompression causes data degradation. Further, not only the sound quality but also the reproduction control information and the copy control information, once converted into the information defined by the DVD, may be missing from the original description. On the other hand, by recording the original content, it is possible to reliably maintain the quality.

Another reason is the copy speed. The size of audio data is much larger than other information such as reproduction control information and copy control information. Therefore, the time required for copying largely depends on the size of the audio data. Here, if copying is performed from the AOB, it is necessary to read the LPCM, compress it if necessary, and write it. On the other hand, the time required to copy the compressed audio data stored in the EMD content is very short. This is because the compression encoding method compresses the data before compression to 1/2 to 1/10,
Further, the time required for the compression / decompression is almost equivalent to the reproduction time length of the audio data.

(User's Designation of Target Music) The system controller responds to the request from the user by the ORG_PGCI
Alternatively, all or some songs stored on the disc are displayed according to UD_PGCI. All these songs are D
This is a song that can be played by a VD player. This is because AOB is always stored. From the list of songs displayed in this manner, the user designates a song desired to be moved by the user interface unit. Note that M
When selecting a target song for OVE, it is desirable that the system control unit displays only the song in which the corresponding EMD content exists, based on the information of EMD_TY1.

(Operation of Writing EMD Content) The system control unit acquires AOBI corresponding to the music specified by the user of the apparatus from the management information. The AOBI thus obtained contains EMDI. E for EMDI
MD_SA and EMD_EA are stored, and based on the address information, the system control unit controls the drive to set AR_EMD. EM from ARO file
Acquire D content. The EMD content thus obtained is passed to the output unit. The output unit is a flash memory and its writer, and the transferred EMD content is recorded in its original format or processed as necessary.

(AOB and EMD Content Deletion Operation) In the case of MOVE, it is necessary to delete the content existing on the copy source medium. Therefore, the DVD recorder must delete the copy source AOB and EMD contents. To this end, the system control unit controls the drive to transfer the EMD content to the AR_EM
D. Delete from ARO file. Further, by referring to the AOBI, an AOB corresponding to the EMD is searched for, and this is also referred to as AR_AUDIO. Delete from ARO file. At the same time, the AOBI is deleted, and the CI referring to the AOBI is also deleted. Along with these deletions, various address information and UD_PGCI / PGI are also modified as necessary.

(Embodiment 2) Embodiment 2 has almost the same configuration as Embodiment 1, but in Embodiment 1, the number of EMD contents corresponding to one AOB is 0 or 1. The second embodiment is an extension of the second embodiment.

FIG. 33 shows an example of the relationship between AOB and EMD contents in the second embodiment. The difference from the first embodiment resides in AOB # 4. Embodiment 1
Although AOB # 4 has a corresponding relationship with only one EMD content in Embodiment 2, in the second embodiment, it has a corresponding relationship with two data of EMD content # 2 and EMD content # 3. The reason for such a correspondence is the same as the reason for the existence of the SAB flag in the first embodiment. SA
The B flag has been used when a plurality of pieces of the same music data are recorded on the same medium in order to effectively use the characteristics of a DVD disk as a large-capacity medium. However, the data actually moved is included in the EMD content, and in this sense, only the EMD content requires a plurality of data. Embodiment 2 achieves this.

(21) A_AVFIT Table In the second embodiment, the data structures of AOB_TY and EMDI are different from those in the first embodiment. Hereinafter, differences between these two data structures will be described.

FIG. 34 is a diagram showing the data structure of AOB_TY. In the first embodiment, since the SAB flag is no longer needed, it is deleted from AOB_TY.

FIG. 35 is a diagram showing a data structure of EMDI. EMDI is composed of header information EMD_GI and A
EM that exists as many as the number of EMD contents corresponding to OB
D_ENT.

“EMD_GI” EMD_GI contains EMD
_TY · EMD_ENT_Ns · EMD_ID are recorded. EMD_TY which is the first information
The data stored in EMD_ID, which is the third information, is the same as in the first embodiment. EMD which is the second information
_ENT_Ns includes EMD_ included in the EMDI.
The number of ENT is recorded.

[EMD_ENT] EMD_ENT includes:
EMD_SA, EMD_EA, EMD_TK_NO 3
Information is stored, and each content is described in Embodiment 1.
Is the same as

(Operation 2 for Recording EMD Content of DVD Recorder) Next, the EMD content on the disc is
The operation when the recorder copies data to another medium by a method such as MOVE will be described. Here, a case where MOVE is performed to a flash memory will be described as an example. The only difference from the similar operation in the first embodiment is the operation of deleting data on the original medium. Therefore, the deletion operation will be described below.

(AOB and EMD Content Deletion Operation) In the case of MOVE, it is necessary to delete the content existing in the copy source medium. Therefore, the DVD recorder must delete the copy source EMD content and delete the corresponding AOB as necessary. To this end, the system control unit controls the drive to
The MD content is AR_EMD. Delete from ARO file. Further, the AOBI corresponding to the EMD is searched for by referring to the AOBI.

When only one EMD_ENT is stored in the AOBI, the AOB referenced by the AOBI is stored in the AR_AUDIO. Delete from ARO file. At the same time, the AOBI is deleted, and the CI referring to the AOBI is also deleted. With these removals,
Various address information and UD_PGCI • PGI are also modified as necessary.

On the other hand, EMD_E is added to the AOBI.
When a plurality of NTs are stored, there is no need to delete the AOB itself. This is an EM that has not yet been deleted
This is because the D content remains and an AOB corresponding to the D content is required. In such a case, the AO
In the BI, only the EMD_ENT corresponding to the EMD content to be deleted is deleted. However, it is necessary to correct EMD_ENT_Ns and various address information with this deletion.

[0202]

As described above, according to the present invention, in order to efficiently copy an AOB and its playback control information for guaranteeing playback compatibility and other media such as MOVE, audio data and playback are performed. Both the EMD content storing control information and copy control information are recorded on the disc. Further, according to the present invention, by storing the correspondence information relating the AOB and the EMD content on the disc, the user of the apparatus can display the two contents as if they were the same content.

[Brief description of the drawings]

FIG. 1 is a logical configuration diagram of a disk according to a first embodiment;

FIG. 2 is a configuration diagram in an audio AV file.

FIG. 3 is a diagram showing a packet structure of the MPEG system.

FIG. 4 is a configuration diagram in a still image AV file.

FIG. 5 is a configuration diagram of an AV file for EMD content.

FIG. 6 is a diagram showing the relationship between audio-related AV data and management information.

FIG. 7 is a diagram showing the relationship between audio-related AV data and management information.

FIG. 8 is a diagram showing the relationship between audio-related AV data and management information.

FIG. 9 is a diagram showing the relationship between AOBU and AOBUI.

FIG. 10 is a diagram showing a relationship between AOB and EMD content in the first embodiment.

FIG. 11 is a configuration diagram of an EMDI according to the first embodiment.

FIG. 12 is an explanatory diagram of an EMD_TY recording format.

FIG. 13 is a configuration diagram of RTR_AMG.

FIG. 14 is a configuration diagram of RTR_AMGI.

FIG. 15 is an explanatory diagram of a format of VERN and TM_ZONE.

FIG. 16 shows RSM_MRKI and DISC_REP_P
ICTI format explanatory diagram

FIG. 17 is a block diagram of a PL_SRP.

FIG. 18 is an explanatory diagram of a format of PL_TY and PL_CREATE.

FIG. 19 is an explanatory diagram of a PTM recording format.

FIG. 20 is an A_AVFIT configuration diagram

FIG. 21 is an explanatory diagram of a format of A_ATR and TXT_ATR.

FIG. 22 is a configuration diagram of AUDFI.

FIG. 23 is an explanatory diagram of an AOB_TY format according to the first embodiment.

FIG. 24 is an AOBUI configuration diagram

FIG. 25 is an explanatory diagram of AOBU_ENT format.

FIG. 26 is a configuration diagram of UD_PGCIT.

FIG. 27 is a PGCI configuration diagram

FIG. 28 is an explanatory diagram of a PG_TY format.

FIG. 29 is a diagram showing a CI configuration;

FIG. 30 is an explanatory diagram of a C_TY format.

FIG. 31 is a configuration diagram of a DVD recorder.

FIG. 32 is a flowchart showing an outline of a process for obtaining a reproduction start address.

FIG. 33 is a diagram showing a relationship between AOB and EMD content in the second embodiment.

FIG. 34 is an explanatory diagram of an AOB_TY format according to the second embodiment.

FIG. 35 is a configuration diagram of an EMDI according to the second embodiment.

FIG. 36 is a view showing the appearance of a DVD-RAM disk;

FIG. 37 is a diagram showing a recording area, a cross section, and a surface of a DVD-RAM disk;

FIG. 38 is a view showing a zone area of a DVD-RAM disk.

[Explanation of symbols]

 2601 User interface unit 2602 System control unit 2603 Input unit 2604 Encoder unit 2605 Output unit 2606 Decoder unit 2607 Track buffer 2608 Drive

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masatoshi Shinbo 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D044 AB06 BC04 CC06 DE02 DE14 DE29 DE48 DE54 EF05 GK12 HL07 5D090 AA01 BB05 CC02 CC14 FF15 GG36

Claims (4)

[Claims] An optical disk for storing first audio data, first reproduction control information relating to first audio data, and second reproduction control information relating to second audio data and second audio data. Wherein the first reproduction control information has at least link information for holding a recording position of the second reproduction control information and recording method type information for recording a recording method type of the second reproduction control information. Optical disc to do. 2. An information recording apparatus for recording first audio data and first reproduction control information relating to the first audio data, comprising: an acquisition unit for acquiring the first audio data and the first reproduction control information. Unit, an audio conversion unit that creates second audio data based on the first audio data, and holds at least a recording position of the second reproduction control information based on the first reproduction control information. A reproduction control information conversion unit for creating second reproduction control information having recording method type information for recording link information and a recording method type of the second reproduction control information; and recording for recording the audio data and reproduction control information. Controlling the acquisition unit to acquire the first audio data and the first reproduction control information, and controlling the audio conversion unit to acquire the second audio data and the first reproduction control information.
, And controls the playback control information conversion section to create second playback control information, and controls the recording section to control the first and second audio data and the first and second audio data. An information recording device, comprising: a control unit that records reproduction control information. 3. A reproducing apparatus for reproducing first reproduction control information relating to first audio data and first audio data, and reproducing second reproduction control information relating to second audio data and second audio data. The first reproduction control information has at least link information for holding a recording position of the second reproduction control information and recording method type information for recording a recording method type of the second reproduction control information; And an acquisition unit for acquiring reproduction control information; an audio reproduction unit for reproducing the audio data; a determination unit for determining whether the recording system type is a reproducible recording system type; and a description unit included in the first reproduction control information. The determination unit is controlled on the basis of the recording system type information to determine whether or not the second reproduction control information and the audio data can be reproduced. If the reproduction is not possible, the first reproduction control information and the first reproduction control information are determined based on the first reproduction control information. Voice of Data is reproduced, and if the reproduction is possible, the acquisition unit is controlled based on the link information described in the first reproduction control information to acquire the second reproduction control information, and the control is performed. An information reproducing apparatus, comprising: a control unit that reproduces second audio data based on information. 4. The first audio data and the first reproduction control information, the second audio data, and the second audio data relating to the first audio data.
An information recording / reproducing apparatus that records / reproduces second reproduction control information relating to audio data, wherein the first reproduction control information includes at least link information holding a recording position of the second reproduction control information; Acquisition unit having recording system type information for recording the recording system type of the second reproduction control information, and acquiring the first audio data, the first reproduction control information, the second audio data, and the second reproduction control information An audio reproducing unit that reproduces the first audio data; a recording unit that records the second audio data and the second reproduction control information; and an input that receives an instruction of reproduction or recording from a user of the device. And controlling the input unit to receive an instruction from a user of the apparatus, and when the instruction is reproduction, control the obtaining unit to obtain first audio data and first reproduction control information. , The first re The first audio data is reproduced by controlling the audio reproduction unit according to the control information, and when the instruction is recording, the acquisition unit is controlled to control the second audio data and the second reproduction control information. And a control unit that controls the recording unit to write the second audio data and the second reproduction control information.