JPH09282666A - Optical disk discriminating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk discriminating method for relieving the burden of an operator and automatically discriminating whether a mounted disk is a reproducing exclusive disk or a disk capable of recording. SOLUTION: When ATIP data are detected in a read-in area (step S2) in a mounted optical disk, data having a recommended recording power exist in detecting sub-code data (step S5), a PMA area exits is decided (step 7) or the ATIP data are detected outside a read-out area, the optical disk is decided to be a CD-R disk (step S3). When the movement to the outside of the read-out area is impossible or the ATIP data are not detected inspite of the movement, the mounted optical disk is decided to be a stamped disk incapable of recording (step 10). In the respective cases when it is decided to be the CD-R disk or the stamped disk, the setting of the corresponding hardware is performed (step 11).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc discriminating method for discriminating whether a mounted optical disc is a recordable optical disc.

[0002]

2. Description of the Related Art During playback of a read-only disc, when an optical disc (CD) is set, a pickup is moved to a home position, the CD is rotated and set up in a state in which information can be read, and after the setup, the CD
TOC information is read from the lead-in area. In this case, when the TOC information cannot be obtained due to a scratch on the CD, the information in the program area is reproduced without the TOC information.

For this reason, conventionally, the discriminating information "normal CD with TOC" and "normal CD without TOC" is stored as disc discriminating information according to the reading result of TOC information, and is used for subsequent information search and the like. To be done.

(4) In recent years, a recordable disc (C
D-R) was developed, and in this CD-R, a guide groove is formed in the recording track, and the guide groove is wobbled at a frequency in which the carrier wave is FM-weighted with absolute time information data (ATIP). At the time of recording / reproducing of the CD-R, tracking and spindle control are performed by this guide groove, and the CD-R in the unrecorded state or the CD-R in the middle of writing
Recording and reproduction are performed on R.

[0005]

By the way, in a conventional recording / reproducing apparatus in which a read-only disc (CD) and a recordable disc (CD-R) are used together, a CD and a CD-R are automatically discriminated. The function is not provided, and it is necessary to set whether the disc is a read-only disc or a recordable disc according to the user's operation when mounting the disc, and the operation is complicated.

The present invention has been made in view of the current state of the above-mentioned operation of discriminating between a read-only disc and a recordable disc, and an object thereof is
It is an object of the present invention to provide an optical disc discriminating method for discriminating whether a disc is a reproduction-only disc or a recordable disc, while automatically reducing the operational burden on the user.

[0007]

In order to achieve the above object, the invention according to claim 1 is an optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable,
The T recorded in the lead-in area of the optical disc
When subcode data indicating multisession is detected in the OC information, it is determined that the optical disc can be recorded.

Similarly, in order to achieve the above-mentioned object, the invention according to claim 2 is an optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable, and is recorded in the lead interior of the optical disc. AT to TOC information
When the IP (absolute time information) is detected, it is determined that the optical disc is recordable.

Similarly, in order to achieve the above-mentioned object, the invention according to claim 3 is an optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable, and the inner circumference of the lead-in area of the optical disc. On the other hand, when the PMA area is detected, it is determined that the optical disk can be recorded.

Similarly, in order to achieve the above object, the invention according to claim 4 is an optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable, and the outer peripheral side of the lead-out area of the optical disc. When the ATIP is detected, it is determined that the optical disc can be recorded.

Similarly, in order to achieve the above-mentioned object, the invention according to a fifth aspect is such that the inventions according to the first to fourth aspects are sequentially executed until the discrimination of the optical discs is confirmed, whereby the optical discs mounted are mounted. Is an optical disc discriminating method for discriminating whether or not recording is possible, and is characterized in that the subsequent processing is stopped at the stage of confirming the discrimination of the optical disc.

[0012] Similarly, in order to achieve the above-mentioned object, the invention according to claim 6 is different from the invention according to any one of claims 1 to 5 in accordance with the discrimination result of the optical disc.
It is characterized in that a step of setting the optimum servo characteristic is provided.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a flow chart of the discriminating operation of the present embodiment, FIG. 2 is a block diagram showing the configuration of an optical disc recording / reproducing apparatus for carrying out the present embodiment, and FIG. 3 is a recording area of an optical disc to be discriminated in the present embodiment. FIG.

A recording / reproducing apparatus for executing the present embodiment is
As shown in FIG. 2, a spindle motor 2 for rotating the optical disc 1 is attached to the optical disc 1, and a laser spot is irradiated onto a pit on the optical disc 1 and the reflected light from the pit is received and photoelectrically converted. An optical head 3 for converting and outputting an RF signal is provided. The EF output from the optical head 3 is supplied to the optical head 3.
M (Eight to Fourteen Module)
sub-code data acquisition means 5 for demodulating sub-code data from a signal) and an ATIP for demodulating ATIP data from a wobble signal output from the optical head 3.
The input terminal of the data acquisition means 6 is connected.

The subcode data acquisition means 5 and A
An output terminal of the TIP data acquisition unit 6 is connected to a control unit 7 for controlling the entire operation, an optical head moving unit 4 for moving an optical head is connected to the control unit 7, and an optical head moving unit 4 is connected to the optical head moving unit 4. The optical head 3 is connected.

The recordable optical disk (CD-R) which is the object of the discrimination operation of the present embodiment has a structure as shown in FIG. 3, and the recording format standard of the CD-R is as follows.
It is standardized as a standard called Orange Book, and index information (TOC) 17 of recorded information is provided from the inner peripheral edge 15 to the outer peripheral edge 16 of the disc.
A lead-in area 10 in which is recorded, a data area 11 in which music information and the like are recorded, and a lead-out area 12 indicating the end of the data area 11 are sequentially formed. The signal recorded here is a digital signal modulated by EFM, and includes subcodes such as time information in addition to main codes such as music information.

A guide groove is formed on the recording track of the CD-R, the wobbling of which is performed by a frequency obtained by FM-modulating the carrier wave by ATIP. The inner peripheral end of the lead-in area 10 is formed on the CD-R during writing. On the 15 side, the PM in which the record history of record information is stored as a temporary TOC in the writing process
A13 is provided.

The optical disc discriminating operation of the present embodiment will be described with reference to the flowchart of FIG. When the mounting of the optical disk on the recording / reproducing apparatus is detected, the optical head 3 is moved to the position of the lead-in area 10 by the command of the control unit 7 in step S1, and the spindle motor 2 is moved.
Is driven, and setup control is performed so that information can be reproduced. Next, in step S2, the ATIP data is detected and collected, and when it is determined that the ATIP data has been collected, the process proceeds to step S3 in which the loaded optical disc is a recordable CD-R disc. It is determined that there is.

When the ATIP data is not detected within the predetermined time in step S2 and it is determined that the ATIP data cannot be collected, the process proceeds to step S4, the subcode data is detected and collected, and the subcode data is collected. When the collection is completed, the process proceeds to step S5, and it is determined whether or not there is subcode data indicating the recommended recording power in the collected subcode data.

When it is determined in step S5 that the subcode data indicating the recommended recording power exists in the collected subcode data, the process proceeds to step S3, and the loaded optical disc is a recordable CD-R disc. It is determined that there is.

If it is determined in step S5 that the subcode data indicating the recommended recording power does not exist in the collected subcode data, the process proceeds to step S6, in which the code indicating the absolute time of the collected subcode data is recorded. It is determined whether the minute code has a value of 97 to 99 (indicating 97 to 99 minutes). If it is determined in step S6 that the minutes code has a value of 97 to 99, step S6.
7, the optical head driving means 4 is driven by the command from the control unit 7, the optical head 3 is moved to the PMA area 13, and it is determined whether or not the movement is normally completed.

When it is determined in step S7 that the movement to the PMA area 13 is normally completed, the process proceeds to step S3, and it is determined that the mounted optical disc is a recordable CD-R disc.

When it is determined in step S6 that the value of 97 to 99 does not exist in the code corresponding to the code indicating the absolute time of the collected sub code data, or step S7
When it is determined that the PMA area 13 has not been normally moved, the process proceeds to step S8, and the optical head drive unit 4 is driven by the command of the control unit 7, and the optical head 3 reads. When moved to the outside of the out area 12 and confirmed to move to the outside of the lead-out area 12,
In step S9, ATIP data is detected and acquired.

If it is determined in step S9 that the ATIP data has been detected and acquired, the flow advances to step S3 to determine that the loaded optical disc is a recordable CD-R disc.

If it is determined in step S9 that the ATIP data has not been detected and acquired, or if it is determined in step S8 that the ATIP data has not moved to the outside of the lead-out area 12, the process proceeds to step S10, and the loaded optical disc is recorded. It is determined that the stamped disc is impossible.

Then, step S3 or step S1
From 0, the process proceeds to step S11 to set the hardware according to the CD-R disc or the stamped disc.

As described above, according to the present embodiment, the lead-in area 10 is used to
Whether TIP data is detected, or whether the detected subcode data has data indicating the recommended recording power, PM
When the presence of the area A 13 is determined or the ATIP data is detected and obtained outside the lead-out area, the optical disc is determined to be a CD-R disc, and the ATIP data is also detected outside the lead-out area. If not, or if it is impossible to move to the outside of the lead-out area, the loaded optical disc is determined to be a non-recordable stamped disc, and is determined to be a CD-R disc or a stamped disc. For each of the above, the corresponding hardware settings are made.

For this reason, according to the present embodiment, it is possible to discriminate the optical disk stably without being affected by the quality of the wobble signal after recording while reducing the operational burden on the user. Therefore, it becomes possible to discriminate whether or not the optical disc can be recorded even for a single-session type CD-R disc.
It is possible to determine whether or not an optical disc can be recorded on a CD-R disc that does not conform to the Orange Book, and whether the optical disc can be recorded even if it is difficult to move to the PMA area. It is possible to determine whether or not it is possible to improve the access speed and stably perform the writing / reproducing operation for the optical disc.

[0029]

According to the first aspect of the invention, when the optical disc is mounted in the recording / reproducing apparatus, the subcode data indicating the multi-session is added to the TOC information recorded in the lead-in area of the mounted optical disc. Is detected, and when subcode data indicating multi-session is detected in the TOC information, it is automatically determined that the loaded optical disk can be recorded.
A stable optical disc that reduces the operational burden on the user and is determined by the subcode data obtained by demodulating the recorded EFM signal from the received light signal, regardless of the quality of the wobble signal after recording. Can be determined.

According to the second aspect of the present invention, when the optical disc is mounted on the recording / reproducing apparatus, the AT is recorded in the TOC information recorded in the lead interior of the mounted optical disc.
It is determined whether IP (absolute time information) is detected,
When ATIP is detected in the TOC information, it is automatically determined that the loaded optical disc can be recorded, so the operational burden on the user is reduced and even for single-session type CD-R discs. Therefore, it becomes possible to determine whether or not the optical disc can be recorded.

According to the third aspect of the present invention, when the optical disk is mounted on the recording / reproducing apparatus, it is judged whether or not the PMA area is detected on the inner peripheral side of the lead-in area of the mounted optical disk. P on the inner side of the lead-in area
When the MA area is detected, it is automatically determined that the mounted optical disc can be recorded, so that the user's operational burden is reduced, and the ATIP of the TOC is the Orange Bo.
Even for a CD-R disc that does not comply with OK, it is possible to determine whether or not the optical disc can be recorded.

According to the fourth aspect of the present invention, when the optical disc is mounted on the recording / reproducing apparatus, it is judged whether or not ATIP is detected on the outer peripheral side of the lead-out area of the optical disc, and the outer peripheral side of the lead-out area is determined. When ATIP is detected in the, it is automatically determined that the mounted optical disk can be recorded, so the operational burden on the user is reduced,
Even if it is difficult to move to the PMA area, it is possible to determine whether or not the optical disk can be recorded.

According to the fifth aspect of the present invention, when the optical disc is mounted on the recording / reproducing apparatus, the discriminating method according to the first aspect of the present invention discriminates whether or not the mounted optical disc is recordable. Are sequentially executed until the determination is made, and the subsequent processing is stopped at the determination stage of the optical disc determination. Therefore, in addition to the effect obtained by the invention according to any one of claims 1 to 4, mounting is performed in a short time. It is possible to determine whether or not the recorded optical disc can be recorded.

According to the sixth aspect of the invention, when the optical disc is mounted on the recording / reproducing apparatus, the discriminating method according to the first aspect of the invention is executed to discriminate the obtained optical disc. Since the optimum servo characteristic is set according to the result, in addition to the effect obtained by the invention according to any one of claims 1 to 5, the recording / reproducing operation for the optical disk is stabilized by improving the access speed. It will be possible to do.

[Brief description of drawings]

FIG. 1 is a flowchart of a discriminating operation according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an optical disc recording / reproducing apparatus for executing the embodiment.

FIG. 3 is an explanatory diagram of a recording area of an optical disc which is a determination target of the same embodiment.

[Explanation of symbols]

 10 Lead-in area 11 Data area 12 Lead-out area 13 PMA 17 TOC

Claims (6)

[Claims] 1. An optical disc discriminating method for discriminating whether or not a mounted optical disc is recordable, wherein T recorded in a lead-in area of the optical disc.
An optical disc discriminating method characterized by discriminating that the optical disc is recordable when subcode data indicating multi-session is detected in OC information. 2. An optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable, wherein the TOC recorded in the lead interior of the optical disc.
An optical disc discriminating method, characterized in that, when ATIP (absolute time information) is detected in the information, it is discriminated that the optical disc is recordable. 3. An optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable, wherein the PMA is provided on the inner peripheral side of the lead-in area of the optical disc.
An optical disc discriminating method, characterized in that when the area is detected, it is discriminated that the optical disc is recordable. 4. An optical disc discriminating method for discriminating whether or not a mounted optical disc is recordable, wherein an ATI is provided on an outer peripheral side of a lead-out area of the optical disc.
An optical disc discriminating method, characterized in that when P is detected, it is discriminated that the optical disc is recordable. 5. An optical disc discriminating method for discriminating whether or not the mounted optical disc is recordable by sequentially executing the optical disc discriminating method according to any one of claims 1 to 4 until the discrimination of the optical disc is confirmed. The optical disc discriminating method characterized in that the subsequent processing is stopped at the stage of finalizing the discrimination of the optical disc. 6. The optical disc discriminating method according to claim 1, further comprising a step of setting an optimum servo characteristic according to a discriminating result of the optical disc. Optical disc determination method.