JP2003151141A - Playback method of rewritable optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a playback method for enabling track head access processing of SKIP UP, SKIP DOWN, etc., when playing back an unfinalized disk. SOLUTION: Q cord information is recorded also on the unfinalized disk in its program region. TOC information is acquired by accessing each piece of music before reproduction to obtain the Q cord information, and by calculating 'absolute time - time within a piece of music'. A track jump to the head position of each piece of music is enabled by storing the acquired TOC information in a memory such as a system controller built-in RAM, and by referring to it during reproduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing method.

[0002]

2. Description of the Related Art In general, an optical disc has TOC information (Ta
Abbreviation for ble Of Contents. The playback time from the beginning of the program area to the beginning of each song,
Information associated with each song number. ) And an unfinalized disc that does not contain all or part of
It is divided into a finalized disc on which C information is completely recorded.

Conventionally, when reproducing an unfinalized disc, some or all of the TOC information does not exist.
Some of the information was not acquired or TOC information was not acquired, and the process was changed to reproduction.

In the method of reproducing without acquiring the TOC information, it is impossible to make a track jump with the beginning position of each music piece as a target. Therefore, SKIP U that needs the beginning position information
P (playback method that sets the playback position to the start position of the song following the current playback song) and SKIP DOWN (playback method that sets the playback position to the beginning position of the song before the current playback song) Is.

Further, in the method of reproducing after acquiring a part of the TOC information, the beginning of the song for which the TOC information has been obtained can be accessed, but for the song for which the TOC information has not been obtained, No access to the beginning of the song.

A conventional optical disk reproducing method will be described below with reference to FIG.

First, as shown in the lower part of FIG. 1, the pickup is in the TOC area (the TOC area is an area inside the program area. In a disc produced by press or a finalized disc, TOC information is recorded in this area. Have been moved to). The pickup is moved by driving the traverse motor and rotating the drive shaft. Next, the pickup reaches the TOC area by detecting an inner peripheral switch (a switch that physically pushes the pickup when the pickup comes to the TOC area, not shown) as shown in the lower part of FIG. When that happens, the pickup stops moving. When the pickup moves to the TOC area, as shown in the lower part of FIG. 1, the focus, traverse, tracking, and spindle servos are first adjusted as an automatic adjustment process. After servo adjustment, the pickup can read the information written on the optical disc by irradiating the optical disc with a laser beam and detecting the reflected light. Therefore, the TOC area is accessed and recorded as shown in the lower part of FIG. Read the information. In the case of an unfinalized disc, the TOC area does not have all or part of the TOC information.
Information cannot be obtained. Access is continued from the inner circumference to the outer circumference of the TOC area without being able to acquire all TOC information.

The area on the outer peripheral side of the TOC area is a program area, and since the first piece of music is recorded, it can be reproduced by continuing access from the TOC area. Judgment that the first song has been reached is made as follows. That is, when you access the first song, Q
Can obtain code information. The Q code information includes the song number of the accessed position, the INDEX number of the accessed position, the absolute time that represents the playback time from the beginning of the program area to the access position, and the beginning of the song that includes the accessed position. There are four pieces of information about the in-song time, which represents the reproduction time up to the specified position. Therefore, it is possible to recognize that the first song has been entered by acquiring the Q code information and reading the song number in the Q code information. When the first song is entered, audio can be output by canceling the audio mute.

Similarly, the second and subsequent songs are continuously accessed.

Next, as a stopping method, the disk rotation is stopped and the audio mute processing is performed during reproduction as in the conventional case. The playback is stopped at the current playback position, and the next playback starts only from the same position.

[0011]

The reason why an unfinalized disc is generated is as follows. That is, (1) TOC when writing data to the optical disc
When the writing process is interrupted due to a disc eject operation or the like during writing even though the information writing is set, (2) The user sets the TOC information writing process with the intention of shortening the writing time. This is the case where the writing process is performed without doing this.

In the prior art, when playing an unfinalized disc, the TOC information cannot be obtained, and there is a problem in that the beginning of music access processing such as SKIP UP and SKIP DOWN cannot be performed. It was

In the case of a rewritable optical disc, the TOC is reformatted and finalized.
Although it is possible to create an optical disc in which information is written, there is a problem in that it takes time to perform formatting processing and the like.

The present invention solves the above problems,
SKIP when playing an unfinalized disc
It is an object of the present invention to provide a reproducing method that enables a music head access process such as UP and SKIP DOWN.

[0015]

According to a first aspect of the present invention, there is provided a method for reproducing an optical disc based on Q code information recorded in a program area of the unfinalized disc before reproducing the unfinalized disc.
It is characterized by creating C information.

According to this structure, even in an unfinalized disc in which TOC information is not recorded, by using the Q code information in the program area, TO
It becomes possible to create C information.

According to a second aspect of the present invention, in the optical disc reproducing method, the absolute time information, the in-time information and the song number information in the Q code information recorded in the program area of the optical disc are used to determine the absolute value of the Q code information. The TOC is calculated by finding the difference between the time and the time within the song and linking it with the song number of the Q code information.
It is characterized by creating information.

With this configuration, the TOC information can be obtained by the system controller even with an unfinalized disc.

According to a third aspect of the present invention, in the optical disc reproducing method, the TOC information created by the method according to the first aspect or the second aspect is stored in a memory, and the stored TOC information is stored.
The feature is that the head of the song is accessed by referring to the information.

According to this configuration, even when reproducing an unfinalized disc, SKIP UP or SKIP
It becomes possible to access the beginning of music such as DOWN.

In the optical disc reproducing method according to the fourth aspect, the TOC area of the optical disc is accessed before reproduction.
It is characterized by detecting whether the TOC information is a finalized disc or an unfinalized disc and outputting the detection result.

According to this structure, the user can recognize whether the disc is a finalized disc or an unfinalized disc before starting reproduction. Therefore, the user can make the next selection before playing. That is, the unfinalized disc can be reproduced as it is, or in the case of a rewritable disc, the reproduction can be ended and the disc can be rewritten as a finalized disc after formatting, and the operability is improved.

The optical disc reproducing method according to the fifth aspect is T
While the OC information is being created, the fact that the TOC information is being created is displayed on the display device.

According to this structure, even if it takes time to create the TOC information before the reproduction of the unfinalized disc, the user refers to the display indicating that the TOC is being produced, and the optical disc reproducing apparatus is out of order. The operability is improved without erroneously recognizing that

An optical disk reproducing apparatus according to a sixth aspect of the present invention includes a pickup for reading a recording signal from the optical disk, an amplifier for amplifying the recording signal read by the pickup, and a digital signal processing circuit for processing and processing the signal from the amplifier. And a system controller that controls the digital signal processing circuit, wherein the system controller creates TOC information based on the Q code information recorded in the program area before playing the unfinalized disc. To do.

According to this structure, even in an unfinalized disc in which TOC information is not recorded, by using the Q code information in the program area, the TO
It becomes possible to create C information.

An optical disk reproducing apparatus according to a seventh aspect is the optical disk reproducing apparatus according to the sixth aspect, in which TOC information of all songs is created based on the Q code information in the program area before reproducing the unfinalized disk. It is characterized in that the created TOC information is stored in a memory, and the beginning of the music piece is accessed with reference to the stored TOC information.

According to this configuration, even if the unfinalized disc has no TOC information recorded, the S
Access to the beginning of songs such as KIP UP and SKIP DOWN will be possible.

The optical disk reproducing apparatus according to claim 8 is the optical disk reproducing apparatus according to claim 6, wherein the system controller determines whether the system controller is an unfinalized disk or a finalized disk by accessing the TOC area of the optical disk before reproduction. It is characterized in that it makes a determination and outputs a detection result.

According to this structure, the user can recognize whether the disc is an unfinalized disc or a finalized disc before starting reproduction. Therefore, the user can make the next selection before playing. That is, it becomes possible to reproduce the unfinalized disc as it is, or, in the case of a rewritable disc, finish the reproduction and format it, and then rewrite it as a finalized disc, which improves operability.

An optical disc reproducing apparatus according to a ninth aspect is the optical disc reproducing apparatus according to the sixth aspect, wherein the system controller accesses the TOC area before reproduction to detect whether the disc is an unfinalized disc or a finalized disc. However, if the disc is an unfinalized disc, it will be displayed on the display device while the TOC information is being created.
It is characterized by displaying that OC information is being created.

According to this structure, even if it takes time to create the TOC information before the reproduction of the unfinalized disc, the user refers to the display indicating that the TOC is being produced, and the optical disc reproducing apparatus is out of order. The operability is improved without erroneously recognizing that

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) An optical disc reproducing apparatus according to a first embodiment of the present invention will be described.

FIG. 2 is a block diagram showing the configuration of the optical disk reproducing apparatus of this embodiment. In FIG. 2, 10
Reference numeral 1 is an optical disk, 102 is a pickup for reading the recording signal of the optical disk 101 by irradiating the signal surface of the optical disk 101 with a laser beam, and capturing the reflected light, and 103 is for amplifying the recording signal captured by the pickup 102. An amplifier 104 is a spindle motor 111 that rotates the optical disc 101 at a constant linear velocity, a thread motor 112 that moves the pickup 102, and a servo control circuit that adjusts the focus and tracking of the pickup 102.
Reference numeral 5 is a digital signal processing circuit for processing and processing the signal amplified by the amplifier 103, and 106 is a system controller for controlling the digital signal processing circuit 105.
Reference numeral 7 is a D / A converter that converts the audio signal processed by the digital signal processing circuit 105 from a digital signal to an analog signal.

An example of the operation of the optical disc reproducing apparatus configured as above will be described below.

The pickup 102 reads the recording signal of the optical disc 101, and the amplifier 103 amplifies the read signal. The signal after amplification is processed by the digital signal processing circuit 105.
Processes into a signal suitable for audio output. The D / A converter 107 converts a signal processed by the digital signal processing circuit 105 from a digital signal into an analog signal and outputs the analog signal.
Is. Further, a part of the signal processed by the digital signal processing circuit 105 is fed back to the servo control circuit so that the pickup 102 can stably read the recording signal of the optical disc 101, and the servo control circuit 104 causes the spindle motor 111 and the sled motor to operate. The servo control of 112 and the operation of the focus and tracking actuators is performed.

FIG. 3 is a diagram showing the movement of the pickup 102 in the reproducing method of the first embodiment.

In reproducing the optical disc 101, first, the pickup 102 is moved to the TOC area on the inner circumference of the optical disc 101. When the arrival at the TOC area is detected by a physical inner circumference detection switch (not shown) or the like, the system controller 106 stops the operation of the pickup 102. When the pickup 102 reaches the TOC area,
The servo is automatically adjusted so that the recording signal of the optical disc 101 can be read. When the readable state is reached, the TOC information 403 recorded in the TOC area is read. Determination of acquisition of all TOC information 403 is performed as follows. That is, if the beginning song number and the ending song number recorded in the TOC area are obtained and all the TOC information 403 of the song numbers between them can be obtained, it is determined that the disc is a finalized disc. If the TOC information 403 of part or all of the song numbers from the beginning song number to the last song number cannot be obtained, or if the beginning song number or the last song number of the TOC area cannot be obtained, use an unfinalized disc. Judge that there is.

When it is judged that the disc is a finalized disc, the reproduction of the optical disc 101 is continued by the conventional reproducing method.

When it is determined that the disc is an unfinalized disc, the lead time of the lead-out area is obtained as follows. That is, the specific track number jump is repeated from the TOC area toward the outer circumference. The outer periphery of the lead-out area is a mirror surface, and if the pickup 102 rushes into the mirror surface, the Q code information cannot be acquired, and thus it is not possible to determine where the pickup 102 is currently located. Therefore, the pickup 102 should be prevented from plunging into the mirror surface. In order to repeat the specific track number jump from the inner circumference to the outer circumference and not to enter the mirror surface on the outer circumference of the lead-out area, the number of tracks corresponding to the width of the lead-out area may be jumped. In the case of a CD, for example, the lead-out area has a reproduction time of 90 seconds. When the lead-out area is located on the outermost circumference of the optical disc 101, the number of tracks is the minimum and is about 280. Therefore, if a specific number of jumps are repeated from the TOC area toward the outer circumference as shown in FIG. 3, the lead-out area should be reached without entering the mirror surface on the outer circumference of the lead-out area. If the pickup 102 reaches the lead-out area, the Q-code information of the lead-out area can be obtained. Therefore, the lead time of the lead-out area can be obtained by obtaining the difference between the absolute time of the Q-code information and the in-track time. it can.

When a specific number of track jumps are repeated as in the first embodiment, the TOC information 403 of the tune at the accessed position is converted into the Q code information by acquiring the Q code information at the access position of the program area. It can be obtained by obtaining the difference between the absolute time 401 and the in-tune time 402. The relationship between the absolute time 401 of the Q code information, the in-tune time 402, and the TOC information 403 is as shown in FIG.
From Fig. 5, absolute time 401 of Q code information and time 40 in song
If the difference of 2 is calculated, the TOC information 403 can be acquired. However, since a specific number of jumps are repeated, when there is a song with a reproduction time equal to or less than the specific number of tracks, there is a song that jumps over and is not accessed. In the example of FIG. 4, 1
Since the 3rd and 7th songs are skipped, TOC
Information 403 cannot be acquired. On the contrary, the TOC information 403 can be acquired for the second, fourth, fifth, and sixth songs and the lead-out area accessed during the repetition of the specific number of jumps.

(Embodiment 2) A reproducing method according to a second embodiment of the present invention will be described.

This embodiment relates to a specific method for obtaining the song numbers of the first and last songs of TOC information.

FIG. 6 is a diagram showing the structure of the reproducing method of the present embodiment.

The example of FIG. 6 describes a specific method for obtaining the song numbers of the first song and the last song of the unfinalized disc. For unfinalized discs, T
Since the song numbers of the first song and the last song are not recorded in the OC area, the song numbers of the first song and the last song cannot be obtained from the TOC area. Hereinafter, a method of obtaining the song numbers of the first song and the last song from the Q code information in the program area will be described. That is, the jump is repeated from the TOC area toward the outer circumference with a specific number, and when the lead-out area is reached, the jump is stopped. If the lead-out area can be accessed, the start time of the lead-out area can be acquired based on the Q code information of the lead-out area. When the start time of the lead-out area can be acquired, the inner circumference side is accessed for 2 seconds from the position indicated by the start time of the lead-out area. When accessed, the music number of the Q code information is referred to. This song number is the song number of the final song. Next, access is made to a position that has advanced to the outer peripheral side for 2 seconds from the start position of the program area. By accessing, the music number of the Q code information is referred to. This song number is the song number of the first song. As described above, the song number of the first song and the pole number of the last song can be acquired.

(Third Embodiment) A reproducing method according to a third embodiment of the present invention will be described.

The present embodiment relates to a specific method of acquiring TOC information that could not be acquired in the first embodiment.

FIG. 7 is a diagram showing the structure of the reproducing method of the present embodiment.

In the example of FIG. 7, in the process of repeatedly jumping a specific number of tracks from the TOC area toward the outer circumference to reach the lead-out area, the first and third tracks can be accessed, but the second track cannot be accessed. 1st song and 3
The TOC information 403 of the song is acquired, but the TOC information 403 of the second song is not acquired. Here, the TOC information of all the songs in the case of FIG. 7 can be acquired as follows. That is, in order to obtain the TOC information 403 of a song for which the TOC information 403 has not been obtained, access to the song is sufficient. In the example of FIG. 7, since the TOC information 403 of the third song has been acquired, generally the length of one song is 2
By utilizing the fact that there is no song less than a second, the TOC information 403 cannot be acquired without jumping over the second song by accessing the inner circumference side for 2 seconds from the beginning position of the third song as shown in the lower part of FIG. It is accessible within the second song. The Q code information can be obtained by accessing the second song, and the TOC information 403 of the second song can be obtained by obtaining the difference between the absolute time of the Q code information and the in-tune time. As described above, the TOC information 403 of all the songs in the case of FIG. 7 can be acquired.

(Fourth Embodiment) A reproducing method according to a fourth embodiment of the present invention will be described.

This embodiment also relates to a specific method of acquiring the TOC information 403 that could not be acquired in the first embodiment, but in the third embodiment, the songs for which the TOC information 403 has not been acquired are consecutive. The difference is that

FIG. 8 is a diagram showing the structure of the reproducing method of the present embodiment.

In the example of FIG. 8, the TOC information 403 of the third and fourth songs cannot be obtained after the track jumps from the TOC region to the lead-out region by repeating a specific number of track jumps, and the first, second, and fifth songs cannot be obtained. T of the song
The OC information 403 has been acquired. As shown in the lower part of Fig. 8, 2 from the time specified by the TOC information 403 of the fifth song.
By accessing the position on the inner circumference side of the second, it is possible to access within the 4th song. If you access within the 4th song,
Absolute time 401 and in-track time 40 by acquiring Q code information
By obtaining the difference of 2, the TOC information 403 of the 4th song can be acquired. If TOC information 403 of the 4th song can be acquired, 4
By accessing the position on the inner circumference side for 2 seconds from the time position designated by the TOC information 403 of the music piece, the third music piece can be accessed. If the third song can be accessed, the Q code information can be obtained, and the TOC information 403 of the third song can be obtained by obtaining the difference between the absolute time 401 and the in-time 402. From the above, the TOC information 403 of all the songs in the case of FIG. 8 can be acquired.

(Embodiment 5) A reproduction method according to a fifth embodiment of the present invention will be described.

This embodiment also relates to a specific method of acquiring the TOC information 403 that could not be acquired in the first embodiment, but the third embodiment and the fourth embodiment are different from INDEX0.
The difference is that the area is 2 seconds or more.

FIG. 9 is a diagram showing the structure of the reproducing method of the present embodiment.

In the example of FIG. 9, when the specific number of track jumps are repeated from the TOC area toward the outer circumference and the lead-out area is reached, the TOC information 403 of the third and fourth songs cannot be acquired and the first and second songs are not acquired. 5th song, 6th song,
The TOC information 403 of the lead-out has been acquired. Three
In order to obtain the TOC information 403 of the tunes 4 and 4, the track jump is performed as follows to access the tunes 3 and 4. First, the TOC information 403 of the fourth song is acquired.
This is because the TOC information 403 of the fifth song has already been acquired in the upper part of FIG. In the lower part of Fig. 9, TOC information 4 for the fifth song
The inner side of the position specified by 03 is accessed for 2 seconds. However, in general, TOC information 403 is the INDE of each song.
Since the information indicates the start position of the X1 area, if the INDEX0 of the fifth song, which is the inner circumference side of the INDEX1 of the fifth song, is an area of 2 seconds or more, the track jump in the lower part of FIG. 9 reaches within the fourth song. I can't do it. The system controller can recognize that the pickup 102 is presently in the INDEX0 area of the fifth song by acquiring the song number of the Q code information at the position accessed in the lower jump in FIG. If the player recognizes that he / she has not reached within the 4th song at the target position, he will then move on to the TOC information 4 for the 5th song.
A track jump is executed targeting a position on the inner circumference side for 4 seconds from the position designated by 03. Since the fourth song can be accessed after the jump in the lower part of FIG. 9, it is possible to obtain the TOC information 403 of the fourth song by obtaining the Q code information and obtaining the difference between the absolute time of the Q code information and the in-time. is there. If the TOC information 403 of the fourth song can be acquired, it is possible to access the third song by accessing the inner side for 2 seconds at the position specified by the TOC information 403 of the fourth song (lower part of FIG. 9). If you can access within the third song, T of the third song
The OC information 403 can be acquired. As described above, the TOC information 403 of all songs in the case of FIG. 9 can be acquired.

(Sixth Embodiment) A reproducing method according to a sixth embodiment of the present invention will be described.

FIG. 10 is a conceptual diagram of the TOC information 403 stored in the memory 110 such as the RAM connected to the system controller 106 in this embodiment.

The TOC information 403 obtained by accessing the program area of the optical disc 101 is stored in the system controller 106 as information associated with each song number. By referring to the stored TOC information 403, it is possible to perform the beginning search. When the TOC information 403 created by accessing the program area is stored, as shown in FIG. 10, if the table information linking each song number and the TOC information 403 of each song is used, it is easy to refer to it later. . Further, the table information is shared with the table information storing the TOC information 403 obtained by accessing the TOC area of the optical disc 101 having the TOC, and the other processing of the program performs the TOC information 403 obtained from the TOC area. It is possible to refer to the TOC information 403 without distinguishing whether it is the TOC information 403 acquired by accessing the program area.

(Embodiment 7) A reproducing method according to a seventh embodiment of the present invention will be described.

FIG. 11 is a diagram showing the structure of the music head search method of this embodiment.

In FIG. 11, it is assumed that the user starts a music head search with the start position of the second music piece as the reproduction position while reproducing the third music piece. The search for the beginning of the second song is the absolute time information in the Q code information of the current position and the T of the second song.
The time difference is first obtained by obtaining the difference in the OC information 403. Next, it is necessary to convert the calculated time difference into the number of tracks. This conversion can be performed by using the conversion table used in the conventional reproducing method. As described above, it is possible to perform the beginning search.

(Embodiment 8) A reproducing method according to an eighth embodiment of the present invention will be described.

FIG. 12 is a flow chart showing the processing sequence of the present invention.

First, the optical disk 1 is loaded into the optical disk reproducing apparatus.
Insert 01. After the insertion, the pickup 102 is moved to the TOC area of the optical disc 101. Pickup 1
When 02 reaches the TOC area, the movement of the pickup 102 is stopped and the traverse servo, spindle servo, focus servo, and tracking servo are adjusted. After each servo adjustment is completed, the TOC area is accessed, and if some or all of the TOC information 403 cannot be obtained, it is determined that the disc is an unfinalized disc, and the display device 108 in FIG. 2 indicates that the disc is an unfinalized disc. To display. For example, as indicated by reference numeral 1103 in FIG. 13, when it is detected that the disc is an unfinalized disc, the letters UNFINALIZED are surrounded by a frame. By confirming the display indicating that the disc is an unfinalized disc, the user can continue the reproduction as it is, or interrupt the reproduction and rewrite the optical disc 101 to reproduce the disc as a finalized disc. The system controller 10 determines whether the disc is finalized disc or unfinalized disc.
6 judges as follows. That is, first, it is determined whether or not the start music number and the last music number can be acquired. If it cannot be obtained, it is determined as an unfinalized disc.
If the top song number and the last song number can be obtained, it is determined whether the TOC information 403 of all the songs having the song numbers specified by the first song number and the last song number can be obtained. If it can be obtained, it is determined as a finalized disc, and if it cannot be obtained, it is determined as an unfinalized disc. In the case of an unfinalized disc, a specific number of track jumps are repeated from the TOC area toward the outer circumference. When the track jump is repeated, the TOC information 403 of each song is acquired from the Q code information of the program area accessed.

The acquired TOC information is stored in the memory as follows. That is, the maximum song number is generally defined as a standard for optical discs. For example, a CD has a maximum of 99 songs. The TOC information is, specifically, the song number of each song and time information from the program area start position to the start position of each song, minutes, seconds, and frames (frames are time information, 75 frames). Corresponds to 1 second). The start time of the lead-out area is also composed of minutes, seconds, and frames. Each of these minutes, seconds, and frames is 1-byte information. As described above, 3 bytes, which is time information for one song from a specific address in the memory space, and 300 bytes information for which 99 songs and the lead-out start time are combined are secured as shown in the upper part of FIG. This is TO
Let C table. On the other hand, as an area for temporarily storing TOC information that can be acquired each time a specific fixed number of jumps are made, a 4-byte area of song numbers, minutes, seconds, and frames is secured in the memory space as shown in the lower part of FIG. Every time the TOC information is stored in the area for temporarily storing the TOC information in the lower part of FIG. 10, the system controller refers to the acquired song number and can obtain the address corresponding to the song number in the TOC table. The minutes, seconds, and frames of the TOC information are stored.

When a specific number of track jumps are repeated to reach the lead-out area, the track jumps are stopped. At this time, if there is TOC information 403 that has not yet been acquired, the number of songs for which TOC information 403 has not been acquired is sequentially set from the outer circumference side to the inner circumference side of the optical disc 101.
By accessing the inner circumference side for 2 seconds from the position specified by the TOC information 403 of the music piece on the outer circumference side of the music piece, it is possible to access the inside of the music piece for which the TOC information 403 has not been acquired. If you can access the song for which TOC information 403 has not been acquired, Q
Get the chord information, absolute time 401 and song time 40
The TOC information 403 can be created by acquiring the difference of 2. When the TOC information 403 is acquired, the TOC information 403 is stored in the TOC table assigned to the memory space in the same manner as above. It is possible to obtain all the TOC information 403 in the same manner thereafter.

While the TOC information 403 is being created from the Q code information in the program area of the optical disc 101 before reproduction, the fact that the TOC is being created is displayed on the display device 108. For example, as indicated by reference numeral 1104 in FIG. 13, when the TOC is being created, the alphabetical character GETTING is displayed surrounded by a frame line. By confirming that the TOC is being created, the user can improve operability without erroneously recognizing that the optical disk playback device is out of order and cannot be played, even if the optical disk playback device takes time. To do.

When all the TOC information 403 can be acquired, it is stored in the memory 110 such as the RAM connected to the system controller 106 in the format of the table information of FIG. After the storage, it is the same as the conventional reproducing method.

[0072]

[Effect of the Invention] TO an unfinalized disc
Since the C information is not written, only the reproduction can be performed by the conventional optical disc reproduction method. SKIP UP and SKIP
Although it was impossible to access the beginning of music such as DOWN, as in the present invention, by creating TOC information based on Q code information, even an unfinalized disc, such as SKIP UP and SKIP DOWN It enables an optical disc reproducing method that requires access to the beginning of the song.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of movement of an optical disc and a pickup.

FIG. 2 is a block diagram of an optical disk reproducing device showing an embodiment of the present invention.

FIG. 3 is a conceptual diagram when a track jump is performed to a lead-out area before reproduction in the present invention.

FIG. 4 is a conceptual diagram when a track jump is repeated from the TOC area toward the outer circumference before reproduction in the present invention.

FIG. 5 is a conceptual diagram of a track jump to a song for which TOC information could not be obtained even after repeating the track jump from the inner circumference to the outer circumference in the present invention.

FIG. 6 is a conceptual diagram of acquiring the song numbers of the first song and the last song before playing the unfinalized disc in the present invention.

FIG. 7 is a conceptual diagram of a track jump to a previous song of a song for which TOC information could not be obtained even after repeating the track jump from the inner circumference to the outer circumference before reproduction in the present invention.

FIG. 8 is a conceptual diagram in the case where the track jump is required in the case of further jumping to the previous song of the song for which TOC information could not be obtained even after repeating the track jump from the inner circumference to the outer circumference in the present invention.

FIG. 9 is a conceptual diagram when the TOC information acquired before reproduction is used in SKIP UP and SKIP DOWN processing in the present invention.

FIG. 10 is a TO number of each song and TO number of each song when TOC information acquired before reproduction in the present invention is stored in a memory 110 such as a RAM connected to the system controller 106.
Diagram showing connection of C information

FIG. 11 is a conceptual diagram showing the absolute time of the Q code information and the in-track time.

FIG. 12 is a flow chart of processing in the present invention.

FIG. 13 is a diagram showing a display example of a display device.

[Explanation of symbols]

101 optical disk 102 pickup 103 amplifier 104 servo control circuit 105 digital signal processing circuit 106 system controller 107 D / A converter 108 display device 109 input device 110 memory 111 spindle motor 112 thread motor 401 absolute time 402 of Q code information song of Q code information Internal time 403 TOC information 1101 Display device 1102 Current playback time display 1103 Unfinalized disc and finalized disc display 1104 TOC information acquisition in progress and TOC information acquisition completion display

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Claims (9)

[Claims] 1. A TO based on Q code information recorded in a program area of the optical disc before reproduction of the optical disc in which all or part of the TOC information is not written.
An optical disk reproducing method characterized by creating C information. 2. The difference between the absolute time and the in-time of the Q code information is calculated by using the absolute time information, the in-time time information and the song number information in the Q code information recorded in the program area of the optical disc. A method for reproducing an optical disc, characterized in that TOC information is created by associating with the song number of the Q code information. 3. An optical disk reproducing method, characterized in that the TOC information created by the method according to claim 1 or 2 is stored in a memory, and the beginning of the music piece is accessed with reference to the stored TOC information. 4. The TOC area of the optical disc is accessed before reproduction to detect whether the optical disc has the TOC information completely recorded or an optical disc in which some or all of the TOC information has not been recorded. An optical disk reproducing method characterized by outputting. 5. A T-display is provided on the display device while the TOC information is created.
2. The optical disc reproducing method according to claim 1, further comprising displaying that OC information is being created. 6. A pickup for reading a recording signal from an optical disc, an amplifier for amplifying the recording signal read by the pickup, a digital signal processing circuit for processing and processing a signal from the amplifier, and the digital signal processing circuit are controlled. It consists of a system controller and T
An optical disk reproducing apparatus, wherein the system controller creates TOC information based on Q code information recorded in a program area before reproducing an optical disk in which a part or all of OC information is not recorded. 7. The TOC information of all the songs is created based on the Q code information of the program area before the reproduction of the optical disc in which some or all of the TOC information is not recorded, and the created TOC information is stored in the memory, 7. The optical disk reproducing apparatus according to claim 6, wherein the beginning of the music piece is accessed with reference to the stored TOC information. 8. An optical disk or TO in which part or all of TOC information is not recorded by the system controller by accessing the TOC area of the optical disk before reproduction.
It is judged whether the optical disc has C information completely recorded,
7. The optical disc reproducing apparatus according to claim 6, wherein the detection result is output. 9. The TOC area is accessed before reproduction by the system controller to detect whether an optical disk in which a part or all of TOC information is not recorded or an optical disk in which TOC information is completely recorded. 7. The optical disk reproducing apparatus according to claim 6, wherein, when the optical disk has not recorded all or part of the information, the TOC information is being displayed on the display device while the TOC information is being created. .