JP2002170339A - Information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recorder for recording information so as to enable seamless reproduction when a layer under reproduction of an optical disk of a two- layered structure during reproducing is changed over and an information recording medium recorded with information by this recorder. SOLUTION: This information recording medium records the respective data groups to the first recording layer when the total of the data quantity of the respective data groups to be recorded is below a first recording capacity and records the data groups dividedly to the first and second recording layers when the total of the data quantity exceeds the first recording capacity. The first recording layer has a lead-in area and a management information recording region for recording the management information of the data groups and the second recording layer has a lead-out area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium such as a high-density optical disk capable of recording information such as images and sounds represented by DVDs at a high density, and an information recording medium for recording information on the information recording medium. It belongs to the technical field of recording devices.

[0002]

2. Description of the Related Art Conventionally, as an optical disk on which information such as images and sounds is recorded, a so-called LD (Laser Disk),
CDs (Compact Disks) are widely used.

In these LDs, image information and audio information are recorded together with time information indicating the time at which each piece of information should be reproduced with reference to the reproduction start position of each LD. For this reason, in addition to general normal reproduction for reproducing recorded information in the recorded order, for example,
In a CD, it is possible to perform playback such as extracting and listening to only a desired song from a plurality of recorded songs, or listening by changing the playback order at random.

[0004]

However, the above L
In D and the like, there is a problem that the viewer has a choice of the displayed image and the reproduced sound, and the viewer cannot select and watch them to perform a so-called interactive change-rich reproduction. there were.

[0005] That is, for example, when a foreign movie recorded on an LD is viewed, a language used for subtitles displayed on the screen is selected (for example, Japanese subtitles and original subtitles are displayed). When selecting or displaying music or listening to music recorded on a CD, select the sound of the music (for example, select whether to listen to English lyrics or Japanese lyrics) I can't do that.

On the other hand, at present, proposals and developments on DVDs, which are optical disks whose storage capacity is improved about 10 times without changing the size of the optical disks themselves, compared to the above-mentioned conventional CDs, are being actively pursued. In order to increase the recording capacity of the DVD, a disk structure having two recording layers is planned.

However, in the case of such an optical disk having a two-layer structure, when switching the layer being reproduced during reproduction, the focal length of the optical pickup is switched, and
The address to be reproduced after switching must be searched. However, it takes a certain amount of time to switch the focal length and search for an address, and it is difficult to reproduce video or audio seamlessly (seamlessly) when data is continuous. In such a case, it is possible to perform seamless reproduction by increasing the capacity of the track buffer of the reproduction apparatus very much or by lowering the reproduction speed to lower the image quality and sound quality. Manufacturing costs increase, and the latter is undesirable for the user.

[0008] Therefore, an object of the present invention is to provide a seamless optical disk having a two-layer structure during switching between layers without increasing the capacity of a track buffer of a playback apparatus or reducing the playback speed. It is an object of the present invention to provide a recording device for recording information so that the information can be reproduced and an information recording medium on which information is recorded by the recording device.

[0009]

SUMMARY OF THE INVENTION In view of the above problems, according to the first aspect of the present invention, when the total data amount of each data group to be recorded is equal to or less than the first recording capacity, each data group is divided into the first recording capacity. In an information recording medium for recording on a recording layer and distributing and recording the data group to the first and second recording layers when the total amount of data exceeds a first recording capacity, the first recording layer is , A lead-in area, and a management information recording area for recording management information of the data group,
The second recording layer is configured to have a lead-out area.

[0010]

Next, a preferred embodiment of the present invention will be described. The embodiment described below describes an embodiment in which the present invention is applied to the DVD.

In the following embodiments, the “data group” in the claims is defined as VTS (Vide
o Title Set). (I) Embodiment of Information Recording Medium First, a physical and logical configuration and operation of a DVD, which is an embodiment of an information recording medium to which the present invention is applied, will be described with reference to FIGS. Will be explained.

First, a recording format (physical recording format) of video information and audio information on a DVD
Will be described with reference to FIG. As shown in FIG.
The DVD 1 of the embodiment has a lead-in area LI at the innermost periphery and a lead-out area LO at the outermost periphery, during which the video information and the audio information are respectively ID (identified). VTS3 with number
(VTS # 1 to VTS # n) and stored. Here, a VTS (Video Title Set) is a title (movie, etc.) that is related (having the same attributes such as the number of streams of audio and sub-pictures, the specifications, and the corresponding language), and the creator intends to present it to the viewer. A single work) is a set (unit). More specifically, for example, for one same movie, a plurality of movies in different languages are recorded as titles, or the same movie is recorded. Even so, the theater version and the special version are each stored as different titles. The video manager 2 is recorded at the head of the area where the VTS 3 is recorded. The information recorded as the video manager 2 includes, for example, a menu indicating the name of each title, information for preventing illegal copying, an access table for accessing each title, and the like, and the video recorded on the DVD 1. Information relating to the entire information and audio information is recorded.

Next, one VTS 3 has a plurality of VTSs each having an ID number, starting with the control data 11.
It is divided into OBs 10 and recorded. Here, a portion constituted by a plurality of VOBs 10 is called a VOB set (VOBS). This VOB set includes control data 11 which is another data constituting the VTS 3, and
In order to distinguish between a plurality of VOBs 10, which are entities of the video information and the audio information, a VOB set is set for the entity.

The control data 11 recorded at the head of the VTS 3 includes a PGCI (Program Chain) which is various information relating to a program chain which is a logical division of a plurality of cells (cells will be described later).
Information) is recorded. In addition, each VOB
10 stores, in addition to the control information, substantial portions of video information and audio information (video or audio itself other than the control information).

Further, one VOB 10 is composed of a plurality of cells 20 each having an ID number. Here, one VOB 10 is configured to be completed by a plurality of cells 20, and one cell 20 is composed of two VOBs 10.
It does not straddle.

Next, one cell 20 is composed of a plurality of VOB units (VOBU) 30 each having an ID number. Here, the VOB unit 30 is an information unit including each of video information, audio information, and sub-video information (refers to sub-video information such as subtitles in a movie).

The one VOB unit 30 includes a navigation pack 41, a video pack 42 having video information,
It is composed of an audio pack 43 having audio information and a sub-picture pack 44 having sub-picture information. Here, a packet containing image data is recorded as the video pack 42, and a packet containing audio data is recorded as the audio pack 43. The sub-picture pack 44 records packets including graphic data such as characters and graphics as sub-pictures. It should be noted that there are eight types of audio that can be recorded on the DVD 1 and 32 types of sub-images that can be recorded, according to standards.

The playback time corresponding to one VOB unit 30 (one navigation pack 41 and one navigation pack 4
1 is recorded so as to have a length of 0.4 second or more. Further, in one VOB unit, the navigation pack 41 always exists at the head, but each of the video pack 42, the audio pack 43, and the sub-picture pack 44 does not necessarily need to exist. The order is arbitrary.

Finally, the navigation pack 41 retrieves search information (specifically, video, audio, etc.) to be displayed.
DVD on which the video or audio to be displayed is recorded
DSI (Data Search Inform)
ation) packet 51 and PCI (Presentation Control Infor) which is information on display control when displaying video, audio, and the like retrieved based on the DSI packet 51.
mation) packet 50, and one V
All video data included in the OBU includes one or more G
An OP (Group Of Picture) 52 is provided.
It should be noted that the PCI packet 50 includes highlight information that defines the display and the operation when the item is selected for the selection item selected by the viewer. For example, in an image (a so-called menu screen) representing an item to be selected by the viewer based on the highlight information, a change in the screen display for the selected item, a display position to be changed, and a command corresponding to the selected item (the selected item) The instruction to be executed corresponding to the item) is set.

Here, image information necessary for composing and displaying a menu screen and constituting and displaying frames, selection buttons and the like is recorded in the sub-picture pack 44 which is the above-described sub-picture information. You.

Further, the GOP 52 is an MPEG2 (Moving Picture Exposure) which is an image compression method adopted when recording image information on the DVD 1 in the present embodiment.
ertsGroup 2) This is the smallest image unit that can be played back independently and is defined in the standard of the system.

Here, the outline of the MPEG2 system will be described. Generally, in a continuous frame image, frame images before and after one frame image are:
In many cases, they are similar and have a mutual relationship. MPE
The G2 method pays attention to this point, and interpolates another frame image existing between the plurality of frame images based on a plurality of frame images transferred at intervals of several frames based on a motion vector or the like of the original image. It is a method of generating by.
In this case, when recording the another frame image,
By simply recording information on the difference and the motion vector between the plurality of frame images, it is possible to reproduce the other frame image by predicting from the plurality of frame images with reference to them at the time of reproduction. . Thereby, compression recording of an image becomes possible.

Further, the outline of the GOP 52 will be described with reference to FIG. FIG. 2 shows an example of a plurality of frame images constituting one GOP 52. FIG. 2 shows a case where one GOP 52 is composed of 12 frame images (the number of frame images contained in one GOP 52 is not constant in the MPEG2 system). The frame image indicated by "I"
It is called an I-picture (Intra-coded picture) and refers to a frame image that can reproduce a complete frame image only with its own image. Further, a frame image indicated by a code “P” is a P picture (Predic
tive-coded picture).
This is a predicted image generated by decoding a difference from a predicted image compensated and reproduced based on an already decoded I picture or another P picture. Further, a frame image indicated by a code “B” is a B picture (Bidirectionally predicated).
tive-coded picture).
It refers to a predicted image that is reproduced using not only an already decoded I picture or P picture but also a temporally future I picture or P picture recorded on an optical disk or the like for prediction. In FIG. 2, the prediction relationship (interpolation relationship) between the pictures is indicated by arrows.

In the MPEG2 system used for the DVD 1 in this embodiment, a variable rate system in which the amount of data included in each GOP 52 is not constant is employed. That is, when each picture included in one GOP 52 corresponds to a moving image with fast motion and the correlation between the pictures is small, the amount of data for configuring each picture increases, and The data amount included in the GOP 52 is also large. On the other hand, when each picture included in one GOP 52 corresponds to a moving image with little movement, and when the correlation between the pictures is large, the amount of data for constituting each picture is reduced, and one picture is included. GO
The amount of data included in P52 is also reduced.

In the recording format having the hierarchical structure shown in FIG. 1 described above, each section can be freely set by the manufacturer according to its intention and recorded. By performing reproduction based on the logical structure described later for each of these sections, various types of reproduction can be performed.

Next, a logical format (logical structure) combining information recorded by the physical divisions shown in FIG. 1 will be described with reference to FIG. Note that the logical structure shown in FIG. 3 does not actually record information on the DVD 1 in that structure, but combines the data (particularly the cells 20) shown in FIG. 1 with the logical structure shown in FIG. Information for reproduction (access information or time information, etc.) is recorded on the DVD 1, especially in the control data 11.

For clarification of the description, the description will be made from the lower hierarchy of FIG. 3. By selecting and combining a plurality of cells 20 in the physical structure described in FIG. The program 60 is logically constructed based on the intention of the producer. This program 60 is also the smallest logical unit that can be accessed by a command by a system controller in a playback device to be described later by identifying a section. The creator can define one or more programs 60 as a minimum unit that can be freely selected and viewed by the viewer.
It is called T (Part Of Title).

One program 60 includes a plurality of cells 2
Since one cell 20 is selected and logically configured, one cell 20 is used in a plurality of programs 60, that is, a so-called re-use of the cell 20 in which one cell 20 is reproduced in a plurality of different programs 60. It is also possible to do.

Here, regarding the number of one cell 20,
When the cell 20 is handled in the physical format shown in FIG. 1, it is handled as a cell ID number (indicated as cell ID # in FIG. 1). When it is handled in the logical format shown in FIG. Are treated as cell numbers in the order of description.

Next, by combining a plurality of programs 60, one PGC (Program Chain) 61 is logically constructed based on the intention of the producer. The above-mentioned PGCI (Program Chain Information) is defined in units of the PGC 61, and in the PGCI, the reproduction order of the cells 20 for each program 60 at the time of reproducing each program 60 (the program 60 A unique program number is assigned to each cell 20).
The address which is the upper recording position, the number of the first cell 20 to be reproduced in one program 60, each program 60
(When information is recorded on the DVD 1 of the present embodiment, at the time of reproduction, random reproduction (random reproduction using random numbers, and the same program 60 may be reproduced plural times), shuffle reproduction (Although random reproduction is performed by random numbers similar to random reproduction, the same program 60 is reproduced only once, and the same program 60 is not reproduced more than once.) Or loop reproduction (one PGC 61 is reproduced many times) ), Or the creator can select a reproduction method based on a combination of loop reproduction, random reproduction, or shuffle reproduction for each PGC 61 and reproduce the same.]
And various commands (commands that can be specified by the producer for each PGC 61 or cell 20). Note that PG
As described above, the recording position of the CI on the DVD 1 is in the control data 11 or in the control data (not shown) in the video manager 2 (see FIG. 1).

One PGC 61 has the PGCI
In addition to this, substantial data such as images and sounds are included as a combination of the programs 60 (in other words, as a combination of the cells 20).

Further, in one PGC 61, the cell 20 shown in the description of the program 60 can be reused (that is, the same cell 20 can be used by different PGCs 61). As for the cells 20 to be used, in addition to the method of reproducing the cells 20 in the order stored in the DVD 1 (reproduction of continuously arranged cells), the cells 20 are reproduced regardless of the order stored in the DVD 1 (for example, later). The producer can select a method (for example, reproducing the recorded cell 20 first) (reproduction of the non-continuously arranged cells).

Next, one title 62 is logically constituted by one or a plurality of PGCs 61. This title 62
Is a unit corresponding to one movie, for example, and is complete information that the producer wants to provide to the viewer of the DVD1.

Then, one VTS 63 is logically constituted by one or a plurality of titles 62. This VTS6
The titles 62 included in each of the titles 3 have common attributes. For example, a movie in a different language corresponds to a single movie in the same language.
The information corresponding to one VTS 63 shown in FIG. 3 corresponds to the information included in one VTS 3 shown in FIG. That is, the DVD 1 has a logical VT shown in FIG.
All the information included in S63 is recorded as one VTS3.

By specifying the information divided in the physical structure by the maker based on the logical format described above, an image (movie or the like) to be viewed by the viewer is formed.

In the description of the physical structure shown in FIG. 1, in order to facilitate understanding of contents, a plurality of cells 20 have IDs.
Although it has been described that the data is recorded in the order of the numbers, in the DVD 1 of the embodiment, one cell 20 is actually
May be divided into a plurality of interleaved units IU and recorded.

That is, as shown in FIG. 4, for example, the manufacturer configures one PGC 61A with cells 20 having ID numbers 1, 2 and 4, and another PGC 61B with cells 20 having ID numbers 1, 3 and 4. When information is reproduced from the DVD 1 based on the PGC 61A, only the cells 20 having the ID numbers 1, 2 and 4 are reproduced, and when information is reproduced from the DVD 1 based on the PGC 61B. Means that only the cells 20 having the ID numbers 1, 3 and 4 are reproduced. In this case, if the cells 20 are recorded separately for each ID number, for example, in the case of the PGC 61A, the cell 20 DVD of the ID number 4 starts from the recording position of the cell 20 of the ID number 2 on the DVD 1.
1 requires a time to jump the pickup for reproduction to the recording position on the cell No. 1 depending on the capacity of the track buffer in the reproducing apparatus described later.
It becomes impossible to continuously reproduce the cell 20 of 0 and the ID number 4 (hereinafter, this is referred to as seamless reproduction).

Therefore, in the case shown in FIG.
The cell 20 having the ID number 3 and the cell 20 having the ID number 3 have a length corresponding to the speed of the input / output processing in the track buffer so that the continuity of the output signal is not impaired even if the input signal is temporarily stopped. (I.e., even if the input signal to the track buffer is interrupted due to the pickup jumping during one interleaved unit IU, the output signal from the track buffer can be continuously output). Each of which is recorded in an interleaved unit IU).
When reproducing based on 1A, only the interleaved unit IU constituting the cell 20 corresponding to the ID number 2 is continuously detected and reproduced. Similarly, when reproducing based on the PGC 61B, only the interleaved unit IU constituting the cell 20 corresponding to the ID number 3 is continuously detected and reproduced.
As described above, the length of the interleaved unit IU is determined in consideration of the capacity of the track buffer, as well as the performance of a drive mechanism such as a slider motor for performing a track jump, as described above. May be done.

As described above, one cell 20 is divided into a plurality of interleaved units IU and recorded according to the manufacturer's intention, so that when the PGC 61 including the cells 20 with discrete ID numbers is reproduced, However, the signal output from the track buffer is not interrupted, so that the viewer can view the reproduced image without interruption.

The above interleaved unit IU
Is formed so as to be completed in one VOB 10, and one interleaved unit IU does not straddle a plurality of adjacent VOBs 10. As for the relationship between the interleaved unit IU and the VOB unit 30, one or more VOB units 30 are included in one interleaved unit IU, and one VOB unit 30 is included in one interleaved unit IU. It is configured to be completed, and one VOB unit 30 is not divided and straddles a plurality of interleaved units IU.

It is to be noted that the DVD has, for example, a storage capacity capable of recording a single movie as well as subtitles corresponding to the movie on a single optical disc. Therefore, it is effective to apply the above recording format to the DVD 1 in particular. (II) Embodiment of Recording Apparatus Next, the control information, image information, and audio information described above are stored in a DVD.
FIG. 5 shows an embodiment of a recording apparatus for recording in
This will be described with reference to FIGS.

First, the configuration and operation of the recording apparatus according to the embodiment will be described with reference to FIG. As shown in FIG. 5, the recording apparatus S1 according to the embodiment includes a VTR (Video Ta).
pe Recorder) 70, a memory 71, and a signal processing unit 72
, The hard disk drive 73 and the hard disk drive 7
4, a controller 75, a multiplexer 76, a modulator 77
And a mastering device 78.

Next, the operation will be described. In VTR70,
Recording information R which is a material such as music information and video information to be recorded on the DVD 1 is temporarily recorded. And VT
The recording information R temporarily recorded in R70 is output to the signal processing unit 72 in response to a request from the signal processing unit 72.

The signal processing section 72 performs A / D conversion of the recording information R output from the VTR 70, compresses the recording information R according to the MPEG2 system, multiplexes music information and video information on the time axis, and outputs the multiplexed signal as a compressed multiplexed signal Sr. I do. Thereafter, the output compressed multiplex signal Sr is temporarily stored in the hard disk device 73.

In parallel with the above, the memory 71 pre-divides the recording information R into partial recording information Pr, and based on the cue sheet ST on which the respective partial recording information Pr is described, the partial recording information R is input in advance. Content information relating to the information Pr is temporarily stored and output as a content information signal Si based on a request from the signal processing unit 72.

The signal processing section 72 outputs a time code T corresponding to the recording information R output from the VTR 70.
t and the content information signal Si output from the memory 71, and referring to the time code Tt, the partial recording information P
generate and output an access information signal Sac corresponding to r;
The access information signal Sac is temporarily stored in the hard disk device 74. The above processing is executed for the entire record information R.

When the above processing is completed for all the record information R, the controller 75
3 and read out the access information signal Sac from the hard disk drive 74, generate additional information DA based on these, and store it in the hard disk drive 74. This is because the contents of some control signals are determined by the result of generation of the compressed multiplexed signal Sr. On the other hand, the controller 75 manages the time of each operation of the signal processing unit 72, the hard disk device 73, and the hard disk device 74, and
The additional information signal Sa corresponding to the
And outputs an information selection signal Scc for time-division multiplexing of the compressed multiplexed signal Sr and the additional information signal Sa.

Thereafter, the compressed multiplexed signal Sr and the additional information signal Sa are time-division multiplexed by the multiplexer 76 based on the information selection signal Scc, and output as an information added compressed multiplexed signal Sap.

The modulator 77 adds an error correction code (ECC) such as a Reed-Solomon code or the like to the output information-added compressed multiplex signal Sap and modulates the disc-recorded signal Sm by 8-16 modulation or the like. Is generated and output to the mastering device 78.

Finally, the mastering device 78 records the disk recording signal Sm on a stamper disk which becomes a master (cutting die) when manufacturing an optical disk.
Then, an optical disk as a generally commercially available replica disk is manufactured by a replication device (not shown) using the stamper disk.

Next, a detailed operation of the system controller 75 of the recording apparatus S1 will be described with reference to FIGS. FIG. 6 is a diagram illustrating the operation of the system controller 75, and FIG. 7 is a flowchart illustrating the operation of the system controller 75.

FIG. 6A shows a disc structure having two recording layers. In FIG. 6A, L0 and L1 are:
Each of them shows a recording layer, and corresponds to layer 0 and layer 1, respectively. LI indicates a lead-in area, and LO indicates a lead-out area. Also,
VMG indicates a video manager area, and a indicates layer 0
B indicates the recording capacity of layer 1, and M
Indicates a mid area where data cannot be recorded.

FIG. 6B shows the data amount and the layer identification flag for each VTS. Where ti
(I = 0, 1, 2,..., N) indicates the data amount of the i-th VTS. The total number of VTSs is n. A
[I] indicates a layer identification flag of the i-th VTS,
When A [i] = 1, the ith VTS is recorded on layer 0, and when A [i] = 0, the ith VTS is recorded on layer 1.

Next, the operation of the system controller 75 for creating the record information R will be described with reference to FIG. FIG.
Will be applied to FIG. 7 as it is. In addition,
It is assumed that VTSs are arranged in advance in the order of data amount. That is, ti> ti + 1.

First, the system controller 75 sets i =
1 (step S2) and A [i] = 0 (step S4)
Is set, and it is determined whether the value of i is larger than n (step S6). Until the value of i becomes larger than the value of n (step S6, YES), the value of i is incremented by one (step S8), and the above step S4 is repeated. When step S6 is YES, all the layer identification flags are set to "0". That is, at this point, it is set so that all VTSs are recorded in layer 1.

Next, when the value of i becomes larger than the value of n, the system controller 75 (step S6, YE)
S), Bsum = 0 (step S10) and x = 1 (step S12) are set, and it is determined whether the value of tx is greater than the value of a (step S14). That is, in step S14, it is determined whether or not the data amount tx of the VTS is larger than the value of a (the storage capacity of the layer 0) in the descending order of the data amount. Here, Bsum is the total data amount of the VTS recorded in layer 1.

Next, when the value of tx is larger than the value of a (step S14, YES), that is, when tx (the x-th VTS) cannot be accommodated in layer 0, the value of tx is set to the value of b ( It is determined whether it is larger than the storage capacity of the layer 1) (step S16). When the value of tx is larger than the value of b (the storage capacity of layer 1) (step S16,
In the case of YES), since tx (x-th VTS) cannot be accommodated in layer 1, "x-th VTS is not recordable" is displayed on a display (not shown). On the other hand, if the value of tx is equal to or smaller than the value of b (the storage capacity of layer 1) (step S16, NO), the x-th VTS is recorded in layer 1, and the value of x is incremented by one (step S20). ).

Next, the system controller 75 sets tx
Is determined to be greater than the value of a (the storage capacity of layer 0) (step S22), and if the value of tx is greater than the value of a (the storage capacity of layer 0) (step S2).
2, YES) includes steps S16, S20 and S
Step 22 is repeated. On the other hand, when the value of tx is equal to or less than the value of a (the storage capacity of layer 0) ((step S14, NO))
Or (Step S22, NO)), A [x] = 1 (Step S24) and α = tx (Step S26) are set. That is, the x-th VTS is recorded in layer 0, and the data amount of the x-th VTS is set in the parameter α.

Then, the system controller 75 sets x
Is incremented by one (step S28), and it is determined whether or not the value of x is greater than the value of n (step S30). When the value of x is equal to or less than the value of n (step S3)
(0, NO), β = α + tx is calculated (step S
32), it is determined whether the value of β is larger than the value of a (the storage capacity of layer 0) (step S34). here,
β is the total amount of data of the VTS recorded in layer 0.

If the value of β is larger than the value of a (the storage capacity of layer 0) (step S34, YES), steps S28, S30 and S32 are repeated. β
Is less than the value of a (the storage capacity of layer 0) (step S34, NO), the value of α is replaced with the value of β (step S36), and A [x] = 1 is set (step S38). ), And return to step S28. On the other hand, when the value of x is larger than the value of n (step S30, YES),
i = 1 is set (step S40), and it is determined whether A [i] = 0 (step S42). If A [i] = 0 (step S42, YES), Bsum = Bsum
+ Ti is calculated (step S44), and the value of i is incremented by one (step S46). A [i] =
In the case of 1 (step S42, NO), the value of i is incremented by one without adding the value of Bsum (step S46). Thereafter, the system controller 75 determines whether or not the value of i is greater than the value of n (step S).
48). When the value of i is equal to or less than the value of n (step S48,
NO), the above steps S42, S44, S46 and S48 are repeated. On the other hand, if the value of i is larger than the value of n (step S48, YES), that is, step S4 is performed for all VTSs recorded in layer 1.
4 is calculated, and after calculating the total Bsum of the data amount of the VTS to be recorded on the layer 1, it is determined whether or not Bsum> b (step S50). When the value of Bsum is larger than the value of b (the storage capacity of layer 1) (step S50, Y
In ES), since the total Bsum of the data amount of the VTS to be recorded on the layer 1 cannot be accommodated in the layer 1, the display (not shown) indicates that "the VTS cannot be recorded". If the value of Bsum is equal to or smaller than the value of b (the storage capacity of layer 1) (step S50, NO), the VTS data to be recorded on layer 1 is recorded on layer 1, and the process ends. Thus, the recording information R is created.

According to the information recording apparatus having the above configuration, each VT
Since video information is recorded on an information recording medium having a two-layer structure using S as a minimum unit,
Since the data is recorded on the information recording medium having the two-layer structure without dividing the TS, it is not always necessary to continuously reproduce the data between the two layers. Therefore, it is necessary to increase the capacity of the track buffer of the reproducing apparatus or to reproduce the data. Each data group can be seamlessly reproduced without changing the speed, even when the reproducing layer of the two-layer optical disc is switched. (III) Embodiment of an information recording medium on which information is recorded by the recording device Next, an embodiment of an information recording medium on which information is recorded by the information recording device will be described with reference to FIG. In the information recording medium shown in FIG.
G, VTS1, and VTS2 are recorded, and VTS3, VTS4, and VTS5 are recorded in layer 1. In addition,
LI indicates a lead-in area, LO indicates a lead-out area, and M indicates a mid area where data cannot be recorded. As described above, since information is recorded without dividing each VTS, areas GAP1 and GAP2 in which information is not recorded are provided in layer 0 and layer 1, respectively. In the embodiment shown in FIG. 8, the VTS is concentrated on the mid area side, but it is possible to record the VTS at an arbitrary position of each layer without dividing the VTS. In addition, an area where a plurality of pieces of information are not recorded in each layer (G
AP).

As described above, according to the information recording medium shown in FIG. 8, video information is recorded on an information recording medium having a two-layer structure with each VTS as a minimum unit.
Since the data is recorded on the information recording medium having a two-layer structure without dividing the TS, it is not necessary to continuously reproduce the data between the two layers. Therefore, the capacity of the track buffer of the reproducing apparatus is increased, and the reproducing speed is reduced. Each data group can be seamlessly reproduced without lowering the data even when the reproducing layer of the optical disc having the two-layer structure is switched.

[0063]

As described above, according to the information recording medium of the first aspect, without increasing the capacity of the track buffer of the reproducing apparatus or lowering the reproducing speed.
Each data group can be seamlessly reproduced even when the reproducing layer of the optical disc having the two-layer structure is switched.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a recording format (physical recording format) of video information and audio information on a DVD.

FIG. 2 is a diagram showing an example of a plurality of frame images constituting one GOP 52.

FIG. 3 is a diagram showing a logical format (logical structure) in which information recorded by the physical divisions shown in FIG. 1 is combined.

FIG. 4 is a diagram for explaining a case where one cell 20 is divided into a plurality of interleaved units IU and recorded.

FIG. 5 is a block diagram of a recording device for recording control information, image information, and audio information on a DVD1.

FIG. 6 is a diagram for explaining an operation of the system controller 75;

FIG. 7 is a flowchart for explaining the operation of the system controller 75;

FIG. 8 is a diagram showing a data structure of an information recording medium on which information is recorded by the information recording device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... DVD 2 ... Video manager 3, 63 ... VTS 10 ... VOB 11 ... Control data 20 ... Cell 30 ... VOB unit 41 ... Navipack 42 ... Video data 43 ... Audio data 44 ... Sub picture data 50 ... PCI data 51 ... DSI Data 52 GOP 60 Program 61, 61A, 61B PGC 62 Title 70 VTR 71 Memory 72 Signal processor 73 Hard disk device 74 Hard disk device 75 Controller 76 Multiplier 77 Modulator 78 Mastering Device ST: Cue sheet Sr: Compressed multiplex signal Si: Content information signal Sac: Access information signal Sa: Additional information signal Scc: Information selection signal Sm: Disk recording signal Sap: Information additional compression multiplex signal Tt: Time code R: Recording information Pr ... part Minute record information

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Yoshiaki Moriyama, 6-1-1-1 Fujimi, Tsurugashima-shi, Saitama Prefecture Pioneer Corporation (72) Inventor Kaoru Yamamoto 6-1-1, Fujimi, Tsurugashima-shi, Saitama Pioneer Corporation Research Laboratory (72) Inventor Junichi Yoshio 4-2610 Hanazono, Tokorozawa City, Saitama Prefecture Pioneer Corporation Tokorozawa Plant F-term (reference) 5D044 AB05 AB07 BC03 CC06 DE54 DE57 DE58 FG18 GK12 5D090 AA01 BB02 BB12 CC04 CC14 DD05 EE11 GG16 GG21 GG36

Claims (1)

[Claims] When the total amount of data of each data group to be recorded is equal to or less than a first recording capacity, each data group is recorded on a first recording layer, and the total of the data amount is equal to the first recording capacity.
An information recording medium for distributing and recording the data group to the first and second recording layers when the recording capacity of the data group is exceeded, wherein the first recording layer includes a lead-in area and management information of the data group. An information recording medium, comprising: a management information recording area for recording information; and the second recording layer includes a lead-out area.