JPH04162261A - Information recording disk and information reproducing method - Google Patents

Abstract

PURPOSE:To prevent a player from runaway by recording data indicating the accessible/inaccessible state of the next data block on data in a writing area. CONSTITUTION:The unit to be additionally described in an unrecorded area is constituted of a landing area including track information, data area, and readout area and the landing area including discriminating information for discriminating whether the data to be recorded next are accessible or inaccessible is recorded against one of the data blocks to be recorded at a position preceding the data block. In other words, the accessible/inaccessible state of an unrecorded area after the trailing end can be discriminated depending upon whether or not the next data block starting position is recorded in the landing area. Therefore, the runaway of a player can be prevented.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is an iil! Recorded areas and additional recordable areas! The present invention relates to an information recording disc having a recording area (hereinafter referred to as a hybrid disc) and an information reproducing method.

(Prior Art) In recent years, various recordable write-once discs have been proposed, and a method in which an area in which data is recorded in advance (hereinafter referred to as ROM1i) is provided in a desired area of the disc, and the remaining area is A hybrid disc having a recordable area (see below, referred to as a recorder pull area) has been proposed. In addition to conventional package media such as compact discs, this provides users with free information ii! It also makes it possible to record images, leading to added value for the media.

In such a hybrid disc, the inner circumferential side of the disc is a ROM so that at least ROM1i can be played by a conventional compact disc player.
It is desirable that the outer circumferential side be the recorder pull area.

Furthermore, on the inner periphery of the ROM mm, there is a TOC (Table of Contents) in which the absolute time recorded on the disk, the start time of each track, etc. are recorded in advance in absolute time.
s) It is necessary to provide a TOC area to record information, but it is also necessary to store comprehensive TOCI information regarding the data recorded in the recorder pull area at any time, and for this reason, the recorder pull area also has the equivalent of a TOC area. It is necessary to provide a landing area for

(aS to be solved by the invention, + However, the data to be recorded is not necessarily completed in one piece of data, but is added to the data one after another.

Therefore, by accessing the disk until the end of the data,
It is necessary to detect whether or not there is a subsequent recordable unrecorded area prior to the recording or reproducing operation.

However, in the area where no data is recorded, there is no synchronization signal or other control data to control the playback device, so there is a possibility that the player will run out of control.

The present invention has been made in view of the above situation, and an object of the present invention is to provide an information recording disc and an information reproducing method that can prevent the player from running out of control.

(Means for Solving Problem 11) An information recording disc according to claim 1 of the present invention is a hybrid disc having a recorded git area that cannot be written on and an unrecorded area that can be written on, wherein the unrecorded area is The recording unit is characterized in that the unit for additional recording is a landing area including track information, data and lead-out area, and identification information for identifying whether access to the next additional recording unit is possible or not is recorded in the landing area.

The information recording disc according to claim 2 of the present invention is a high print disc having a recorded area that cannot be additionally recorded and an unrecorded i area that can be additionally written, and a recording unit to be additionally recorded in the unrecorded area is determined by track information. A recording unit of 9 Jl consisting of a landing area and data without
I! consists of a second recording unit consisting only of data, a landing area with track information, and a data and lead-out area. The recording unit is divided into three recording units, and identification information for identifying whether access to the next additional recording unit is possible or not is recorded in the landing area having the track information.

The information reproducing method according to claim 3 of the present invention has a recorded area in which additional recording is not possible and an unrecorded area in which additional recording is possible, and the information additionally recorded in the unrecorded area a includes at least track information. A method for reproducing information recorded on a hybrid disc in units of a landing area, a program area where data is recorded, and a lead-out area, the landing area of the hybrid disc being sequentially accessed and located at the end of the hybrid disc. It is characterized in that it reads the access permission/prohibition information of the next additional write unit in the landing area that includes track information, and stops access depending on the result of this reading.

(Function) According to the information recording disk according to claim 1, for one of the data blocks to be recorded, it is determined whether or not the data to be recorded next can be accessed at the position preceding the data block. According to the information recording disk according to claim 2, characterized by a landing area that includes identification information for identifying, the data to be recorded is divided into a plurality of data blocks, and the data block that precedes the last data block of the plurality of data blocks is provided. According to the information reproducing method according to claim 3, characterized in that the landing area includes identification information for identifying whether data to be primarily recorded at a position can be accessed or not, the landing area located at the end of the landing area are accessed sequentially to obtain information on whether or not the next data block included in this landing area can be accessed, and when information is obtained that the next data block cannot be accessed, access to the next data block is stopped.

(Example) Embodiments of the present invention will be described below based on the drawings.

First, the physical configuration of the hybrid disk used in the present invention will be explained.

FIG. 7 is a plan view of the ROM area and the recorder pull area in the hybrid disc.
Type A, in which the OM area is configured by focusing like conventional compact discs, and Iil!, which is similar to the recorder pull area. There is a type B that forms marks on the recording thin film.

FIG. 7(,) shows the disc format of a type A high print disc, in which the left side of the drawing is the inner circumference of the disk, and the right side is the outer circumference of the disk.

A lead-in area is provided at a predetermined position on the innermost circumference of the disc, similar to conventional compact discs, and within this lead-in area, the total recording time of the ROM 1 area that follows, the number of tracks in the ROM area, and TOC information indicating the start time of each track in the ROM area.

A program area is formed following the lead-in area, and a lead-out area is formed at the end of the ROMI castle. That is, when focusing only on the lead-in area, program area, and lead-out area, the disc format is similar to that of a conventional compact disc.

At a position subsequent to the ROM area, a recorder pull area is formed with a suitable non-recording area in between.

At the beginning position of the recorder pull area is a PCA (Power
rCarribration Area) and PMA
(Program Memory Area) is provided. Details regarding these will be described later.

Subsequently, a landing area is formed as a period corresponding to the lead-in area described above, and a program area is formed subsequent to this.

FIG. 7(b) shows the disk format of a type B hybrid disk.

In type B, the ROM area also has the same physical characteristics as the recorder pull area, and the above-mentioned PCA and PMA are provided further inside the lead-in area of the ROM area. After that, the lead-in area program area,
A ROM area is formed by the lead-out area,
Immediately after that, a recorder pull area is provided.

In the recorder pull area and the type B ROM area, pre-groups are formed in advance, and are used for tracking control so that recording is performed along these pre-groups during recording.

Further, this pre-group is wobbled at a predetermined frequency, and this wobbling frequency is, for example, 22.05.
It is specified as KHz and is used as a signal for spindle servo during recording. Of course, it may also be used during playback.

The wobbling group is also frequency modulated,
It is designed to represent data representing absolute time on a disc, and even on an unrecorded disc, by demodulating this, absolute time (that is, address information) can be obtained.

The above-mentioned PMA is an area where the start time and end time of the recorded track (or song in the case of audio data) are recorded. In conventional compact disc formats, information equivalent to this is recorded as TOC information in the lead-in area, but in the case of high print discs, the start and end of each track are not determined by data recorded in unrecorded areas. The start and end times are recorded in the PMA in response to the new track number being incremented.

Since the disc standard allows a maximum track number of 99, the PMA also secures GT castle corresponding to this number.

The PCA area is a test cutting area for determining the optimum laser power during recording.

FIG. 1 shows the configuration of an embodiment of the above-mentioned hybrid disc recording and reproducing apparatus.

In the figure, a disk 10 is freely rotatable by a spindle motor 22, and the rotation of the spindle motor is controlled by a spindle servo circuit 21.

The signal on the disk read by the optical pink-up 11 is sent to the data demodulation circuit 1 via the HF (high frequency) amplifier 12.
3. Slider No.-bo circuit 18, actuator servo times! 20 and the wobble detection section 23.

The data demodulation circuit 13 is for demodulating digital data from the read RF multiplied signal, and includes an EFM demodulation demodulator 3a for demodulating EFM modulated data into 16-bit digital data, and a clock for extracting a reproduction clock. A synchronization detection section 13c detects a synchronization signal, a data extraction section 13d extracts control data (address, control data, etc.) from a signal, a subcode demodulation section 13e demodulates subcode data, and an interleaved Descrambler 13 for restoring data
f, writes the data read from the disk, descrambles 13f I! It is comprised of a RAM 13g from which data is read under I control, a CIRC correction section 13h that detects data errors, corrects them, and interpolates them, and the like.

The data read from the RAM 13g by the descrambler 13f becomes reproduction data.

The slider servo circuit 18 is equipped with a pink-up 11 and is a slider (
(not shown) in the radial direction of the disk, and more specifically, it applies the DC component of the tracking error signal obtained from the reproduced signal to the slider mechanism unit 9.

The actuator servo circuit 20 is a circuit that drives an actuator for focus servo to accurately form several beam spots on the disk 10, tracking servo to make the beam spot follow a track, and the like.

Spindle servo time N21 is still 1 fill! For recording discs, a drive signal is applied to the spindle motor 22 so that the wobbling frequency detected by the wobble detector 23 is constant, and for recorded discs, the reproduction clock is at a predetermined frequency.

The wobble detection unit 23 generates a signal by envelope-detecting the amplitude of the RF signal component, which fluctuates due to the meandering of the group, for example. As mentioned earlier, the wobbling information detected by the envelope is data indicating the absolute time of the disc.
The system controller section 16, which detects the absolute time detected by the detection section 24 and supplies the inspected absolute time to the system controller section 16, controls the entire recording/reproducing apparatus shown in FIG. A memory 17 is provided for storing track information including C information.

On the other hand, 14 is a data conversion circuit a used during recording, and the recording data input via line 28 is CIRC.
CIRC adding section 14c for adding codes, interleaving circuit 14a for interleaving, and RAM 1
4b, a subcode 14e that generates a subcode, and an E that performs EFM modulation on the digital data processed by these;
FM modulation section 14d, sync addition section 1 that adds a synchronization signal
The data generated by the data modulation circuit 14 is optically modulated by a diode drive circuit 15 for driving a laser diode, and the optically modulated signal is supplied to the laser diode in the pink amplifier 11. , v on the disk 10 by the modulated light beam
2 will be recorded.

Incidentally, reference numeral 26 denotes a loading m* section that loads or ejects a disk onto a spindle motor, and is driven by a loading driver 25 that is controlled by a control signal from the system controller section 16.

FIG. 2 shows an information supply device that supplies information to be recorded to the information recording and reproducing device of FIG. 1.

As shown in the figure, the information supply device includes a host computer 33 that stores data read from a data storage 31 such as a CD-ROM in a panzer memory 32 and sends the data to the hybrid disc coder section. It is equipped.

Commands are then supplied to the III system control unit 16 via the pass line 27.

Further, data to be recorded is supplied to the data modulation circuit 14 in FIG. 1 via the pass line 28.

Data recorded on the disc 10 needs to be managed as data blocks.

For this reason, the host computer 33 manages the data length to be recorded and calculates the block length required for one data block. It also sends control such as writing of landing data and lead-out to the system control unit 16, and also controls interruption and resumption of reading from the data storage 31 if there is a data transfer waiting time for the recording/reproducing device 1.

Here, a case will be described in which the data to be recorded is completed within one data block on the disk 10.

FIG. 3(a) shows the recorder pull M following the ROM area.
This shows how one unit consisting of the landing area, data, and lead-out area is recorded continuously in the area. In the figure, two units have been recorded, and the rest are unrecorded, but this indicates that there is a possibility that they will be recorded in the unallocated e area that follows them in the future.

In this case, the host computer sends a command to the system control unit 16 to write the following information in the landing area.

■Including information on the lead-in area in the ROM area,
All of the information written to the most recent landing area, as well as information about the data blocks that will be written.

■Start address information of the next data block to be recorded (hereinafter, this information is collectively referred to as track information).

Here, the start time of the next data block to be recorded can be determined by adding the time required for lead-out and landing, since the length of the data block to be written is calculated in advance by the host computer. can.

On the other hand, in Figure 3(b), ROM1 is shown as in Figure 3(a).
This shows that one unit consisting of the landing area, data, and lead-out area is continuously recorded in the recording information of the recorder pull area t area that follows the area, but the data written at the end After , the case where no writing is performed is shown.

This includes not only cases where the recorder pull area on the disk has reached its physical limit, but also cases where recording is prohibited in the remaining recorder pull area by a command from the host computer 33.

In such a case, control is performed so that only the above-mentioned +)) information is recorded in the landing area when writing the last data block, and the start address information of the subsequent data block is not recorded.

In this way, the starting address information of the next data block is stored in the landing area! The end of the data on the disc can be determined by whether it is recorded or not.

This means that when comparing TOCffN readings prior to playback, it is necessary to access the last landing area, but if it is determined that the next data does not exist, the TOC information can be determined at that point. become.

FIG. 3(C) shows the recorded contents when the data to be recorded is not recorded in one data block, but is divided into a plurality of data blocks and recorded.

In the case of FIGS. 3(a) and 3(b), a landing area is provided in advance of each data block, but if the data block is divided into a plurality of parts and recorded, each landing area is wasted. Therefore, an imaginary landing area with no track number is formed at the position preceding the first data block when the divided data is 1 to N, and data blocks from 2 to Nl have only data blocks. Record.

Then, a landing area containing the information of (1) and (Q) described above is formed at a position preceding data block N, which is the final data, and a lead-out area is recorded after data block N is completed.

In this case, if the host computer instructs not to write the following data, only the information marked with ■ above is written, which is the same as the explanation of the jIS diagram (b).

In this case, since the actual landing area is recorded only at the end of the divided data block, the recording/reproducing device uses exactly the same recording format as shown in FIGS. 3(a) and (b). It is possible to determine the end of the data.

Here, the landing area is: (a) Landing area that includes TOC information and the start address of the next data block; (b) Landing area that includes TOC information but does not include the start address of the next data block; (c) Track There will be landing areas that contain no information.

An example for identifying these is shown below.

Information in the landing area is recorded in a data format compliant with the compact disc format.

Here, subcodes on compact discs will be explained with reference to Figure 4.

FIG. 4 shows the Q data formant within the subcode.

In the figure, So and Sl are subcoding syncs, and the C0NTR0L section shows flags for distinguishing between emphasis and 2 channels/4 channels in a 4-pin configuration.

Continued ADR is 4-focus data for determining the mode, and modes 1 to 3 have been used up to now. The CRC is a 16-bit Cyc code for error correction.
lic Redundancy check char
acter, and these data groups are repeatedly recorded.

Next, DATA-Q carries different information contents between the program area and the lead-out area and the information in the lead-in area.

In the program area, the track number (T
NO), index code (χ), elapsed time within the track (MIN, 5EC), and frame (F
RAME), ZERO- with fixed focus, absolute elapsed time (AMIN, ASEC) and absolute frame (AFRAilE) are recorded. This f# information is recorded in the Q data in the data block in the recorder pull area.

On the other hand, in the Q data in the lead-in area, the track number (Ding NO) is fixed to #QQy+, and POINT, PMIN, PSEC, PFI?
TOC information is stored in AP4, IN and PS in P.
The values of EC and PFRAM give the start position of the track indicated by POINT, etc. Especially POIN
T= PMIN when A2 is indicated.

PSEC, PFRAM readout start time,
That is, it represents the last time information and frame of data.

Also, if it is a hybrid disk, lll0d
When e=5 and the start point of the first data block in the recorder pull area is POINT=BO, M
Represented by IN, SEC, and PRAM. Similarly, PMIN when the start time of the lead-out area from the outermost possible circumference in the recorder pull area (i.e., the time at the end of the recording area) is POINT=BO,
Each is represented by PSEC and PFRAM.

In addition to this information, the Q data in the landing area includes information on newly recorded data, including information on the landing area recorded immediately before, and is updated and recorded each time. Therefore, the TOC information of the landing area located at the end of the disc indicates the TOC information of all the data recorded on that disc.

For example, the mode recorded in ADH is set to n+ode.
= 5 identifies it as a hybrid disc, and whether it is type A or type B is determined if 00 is recorded in the ZERO data at the time of POI revision = BO, type A is recorded, and 01 is recorded. If so, it is determined that the disc is a type B disc.

Furthermore, the identification information of (a) to (c) mentioned above is a POINT.
Identified by data recorded in .

For example, the data in (a) and (b) that have substantial track information are set to mode=5 and POINT 00.

For example, PMIN corresponding to POINT = 01 to 99
, PSEC.

PFRAME indicates the starting position of each track.

When POINT=AO, the information shown in PMIN indicates the first track number in the recorder pull area. This number is the final track number of the ROM area plus 1.

When POINT=AI, the information shown in PMIN indicates the last track number recorded in the recorder pull area.

When POINT = A2, PMIN, PSEC,
The start time of the lead-out area of the recorder pull area (ie, the final time of the data block) is recorded in PFRAME.

When POTNT = A3, PMIN, PSEC,
PFRAME indicates the start time of the data block of the next recording unit in the recorder pull area.

Therefore, if POINT = A3 is recorded, it will be identified as a landing area with the information in (a), and if POINT = A3 is not recorded, it will be identified as the landing area with the information in (b). , can be used as information prohibiting access to the next data block.

On the other hand, the landing area (c) which does not have track information can be identified by fixing +POINT='00.

In short, unique identification data indicating which of the landing areas (A) to (C) is included in the Q data may be included.

Next, a method for recording and reproducing the hybrid disc recorded as described above will be explained.

First, prior to a recording operation, it is necessary to identify whether or not it is a hybrid disc, and if it is a hybrid disc, it is necessary to identify whether it is type A or type B. Thereafter, it is necessary to import the TOC information of the information portion that has been recorded up to that point, and to determine whether recording is possible or not in the unrecorded area.

An example of these series of operations will be explained using the flowchart shown in Figure jI5.

First, the track information stored in the memory 17 in step 501 is cleared, and the track information of the preceding lead-in area in the ROM area is read (step 502). The read track information is stored in the memory 17 in step 503.
is stored in

MOD as the mode of track information read here
If E=5 exists, it is determined that it is a hybrid disk, so if it is determined in step 504 that it is a hybrid disk, the process moves to step 505, and it is determined whether or not it is a type A disk. As described above, this can also be determined from the ZERO data when POINT=BO in the track information.

Therefore, since the location of the PMA area on the disk is different between type A disk and type B disk,
If it is type A, type A PM in step 5o6.
Access area A, read the start address of the last track, and if it is type B, enter type B in step 507.
accesses the PMA area of the disk and reads the start address of the last track.

Here, since it is specified that the landing area is recorded for one minute prior to the data block, a range extending back within one minute from the start address of the last track is searched (step 508). For the details of the search operation at this time, well-known techniques will be used as appropriate, and the details will be omitted.

Once the target point has been accessed, it is determined in step 509 whether a landing area exists there. This is because multiple track numbers are allowed to exist in the same data block, so there is a possibility that data for the previous track number is recorded immediately before the last track. This is because the landing area cannot be read. Therefore, if a landing area does not exist at this point, a landing area containing track information located at the beginning of the data block is searched for in step 511 while sequentially reading the reproduced data at a slow speed. If the landing area can be read, the process moves to step 510 and the track information is stored in the memory 17.

Here, whether or not it is possible to write to the next recording area, that is, POI
Determine whether NT=A3 is indicated, and if recording is not possible, prohibit the recording operation; if recording is possible, 1 of the start time of the next data block recorded in the Q data. The range up to the previous minute is accessed in step 514, and the information to be recorded in the landing area in step 515, that is, the track information recorded up to the last minute is updated with the track information related to the data to be newly recorded this time. Record.

Thereafter, a data block is recorded in step 516, and a lead-out area is recorded in step 517. Finally, data such as a start address and an end address related to the recorded data block are recorded in the PMA area in step 518, and the series of recording operations is completed.

Note that the lead-out area is recorded immediately after step 516, but when recording in the recording format shown in FIG. Of course, control is performed so that the lead-out area is written after recording the area and writing the Nth data block.

This series of commands is issued from the host computer to the system control section.

In this way, depending on whether the start position of the next data block is recorded in the landing area, it is determined whether access to the unrecorded area after the end is possible or not.
Recording operations are enabled when access is possible.

Next, the operation for reproducing the hybrid disc will be explained with reference to the flowchart shown in FIG.

In step 601, the memory 17 is cleared, and in step 60
Step 2 accesses the lead-in area to be moved within the ROM area, reads the information in step 603, and stores the read track information in the memory 17 in step 604.

In step 605, it is determined whether or not it is a high print disc. If it is determined that it is not a hybrid disc, there is no landing area and there is no need to update the track information stored in the memory, and step 617 to complete playback preparations.

If it is a hybrid disk, POINT=B
Since the starting point of the first data block is read from IN, SEC, and FRAME indicated by O, this is set as the target address in step 606.

Since the target address set here is the start point of the data block, the landing area immediately before it started more than one minute ago. Therefore, in step 607, access to the landing area calculated from the target address is started.

Next, in the case of a virgin disc, although data is recorded in advance in the ROMfi area, since nothing is recorded in the recorder pull area, naturally no landing area is recorded. Therefore, in step 608, it is determined whether the area is a recorded area or not, and if the disc has nothing written in the recorder pull area, access 1! Complete preparations.

If the area is a recorded area, the landing area data is read and it is determined whether the landing area includes track information or not (step 610).
If rack information is included, that information is stored in the memory 17.

Then, it is determined in step 615 whether or not it has the start address of the next data block, and if it contains the start address of the next data block, that address is set as a new target address in step 616, and step 60
Move to 7. If the start address of the next data block is not included, it is assumed that no data after that data block exists, and the process moves to step 617.

In step 610, if the accessed landing area does not contain track information, that is, in FIG.
), if it is a fictitious landing area at
In order to search for a landing area that includes track information, the pink amplifier is transported at a slow speed (cue operation) in step 612, and the search operation is performed until the landing area is searched (step 613). Step 61
If it is determined in step 3 that the landing area has been searched, the landing area is read in step 614, and the process moves to step 611.

Through the access preparation operation described above, track information including TOC information of recorded data is stored in the memory 17 prior to reproduction.

Moreover, in step 615, it is determined whether or not the start address of the next data block is recorded among the track information included in the landing area, and if this is not recorded, access to the unrecorded am is prevented. Therefore, it is possible to prevent the player from running out of control.

If it is determined in step 608 that the area is not a recorded area, this means that an unrecorded area has been entered, but at that point all track information has been stored in the memory 17, so access cannot be made as is. Preparations can be completed, eliminating the risk of the player running out of control.

(Effect of the invention) As described above, in the information recording disk of claim 1,
When recording data that is completed within one data block, a landing area having track information is recorded for each data block, so it is easy to search for track information to be read prior to recording and playback. Moreover, since data indicating whether the next data block is accessible or not is recorded in the data in the landing area, it is easy to determine the end of the data block.

In the information recording disc according to claim 2, although the data to be recorded is divided into a plurality of data blocks, the landing including track information is recorded only in the last data block, so that the recording capacity of the disc is not wasted. Moreover, it is easy to determine the end of the data block as in the information recording disk according to claim 1.

In the information reproducing method according to claim 3, when storing the latest track information, unnecessary access to the Shuki aWL castle can be prevented by accessing only the landing area, thereby reducing the risk of the player running out of control. Gender disappears.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an information recording and reproducing device according to an embodiment of the information recording disk and information reproducing method of the present invention, and FIG. 2 is a block diagram showing information to be recorded in the information recording and reproducing device of tJ1 diagram. A block diagram showing an example of an information supply device for supplying j! ! Figure 3 (a), (b),
(c) is a diagram showing the format on the disc recorded by the information recording and reproducing device in Figure 11, Figure 4 is a reference diagram of the data format of the subcode, and Figure 5 shows the operation for preparatory work at the time of recording. FIG. 6 is a flowchart for explaining the operation of preparing for playback, and FIG. 7 is a diagram showing the formant on the hybrid disc. 10... Optical disc, 11... Optical pink up, 1
2...HF (high range) amplifier, 13...Data demodulation circuit, 14...Data modulation circuit, 15...LD drive circuit jL16...System control section, 17
...Memory, 23...Wobble detection unit, 24...
ATIP detection section. Patent applicant: Representative of Pioneer Co., Ltd.
Patent Attorney±4＼Nobu Jundo Patent Attorney Small
Wataru Kura

Claims (3)

[Claims] (1) In a hybrid disc having a recorded area that cannot be additionally written to and an unrecorded area that is additionally writable, the units for additional writing to the unrecorded area are a landing area containing track information, data and a lead-out area, and the landing area An information recording disc characterized in that identification information for identifying whether access is possible or not for the next additional recording unit is recorded in the area. (2) In a hybrid disc that has a recorded area that cannot be used for additional recording and an unrecorded area that can be used for additional recording, the recording unit for additional recording in the unrecorded area is a recording unit that is composed of a landing area and data that do not have track information. 1 recording unit, a second recording unit consisting only of data, a landing area having track information, and a third recording unit consisting of data and a lead-out area, and having the track information. An information recording disc characterized in that identification information for identifying whether access to the next additional recording unit is possible or not is recorded in a landing area. (3) It has a recorded area that cannot be additionally written to and an unrecorded area that is additionally writable, and the information that is added to the unrecorded area includes at least a landing area that includes track information, a program area where data is recorded, and a method for reproducing information recorded on a hybrid disc in units of lead-out areas, the landing areas of the hybrid disc being sequentially accessed, and the next track in the landing area containing track information located at the end of the hybrid disc being accessed sequentially. An information reproducing method characterized by reading access permission/inhibition information for each additional write unit, and suspending access according to the result of this reading.