JP3182520B2 - Optical information recording device and information recording method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical information recording apparatus and an information recording method for optically recording information on a disk-shaped recording medium.

[0002]

2. Description of the Related Art In recent years, various write-once recording disks have been proposed, and among them, a compact disk (Compac
t Disc (CD) format (hereinafter referred to as
R-CD).

[0003] That is, a CD defines a lead-in area, a program area, and a lead-out area. In a signal, in addition to information such as a reproduction time and a frame in a subcode data, in particular, a lead-in area Records TOC (Table of Contents) information corresponding to an index of information recorded in the program area.

An R-CD (write-once CD) can also be reproduced by a read-only player by recording such information on a disc in the same manner as the above-mentioned CD.

[0005] However, a pre-groove is formed on the R-CD disc, that the pre-groove is wobbled, that the wobbling frequency is frequency-modulated by the absolute reproduction time, and that the inner circumference is further than the lead-in area. There are some differences in that there are areas called PCA and PMA.

However, in any case, when reproducing a recorded disk, it is necessary that the disk can be reproduced by a conventional CD player.

By the way, in the CD format standard, at least the first two seconds of the program area,
A silent portion (this is called an actual pause area) is provided.

[0008]

Generally, when information is recorded, if the information is not recorded on a recording medium to be recorded, the information is recorded from the head of a recordable area of the recording medium. I do.

However, in the CD format, an actual pause area is provided at the beginning of the program area. Therefore, when the user records information on an R-CD on which no information has been recorded yet, if the information is recorded from the top of the recordable area, that is, the program area, the R-CD on which the information has been recorded will not The actual pause area does not exist.

The present invention has been made in view of such a situation, and an optical system which can automatically and reliably prevent inappropriate information from being recorded in an area to be secured as an actual pause area. An object of the present invention is to provide an information recording device.

[0011]

An optical information recording apparatus according to the present invention is an optical information recording apparatus for recording information on a recordable compact disc by a recording beam emitted from a pickup, wherein the recordable compact disc is provided. Has a lead-in area for recording traction information of information to be recorded on a recordable compact disc, and a program area for recording the information to be recorded, and the information to be recorded is already stored in the program area. Determining means for determining whether or not the information is recorded; and when the determining means determines that the information to be recorded is not recorded on the recordable compact disc, the information to be recorded is started at the start of the program area. From a position two seconds or more behind the point, and the information to be recorded is recordable. If it is determined to have been recorded on a compact disc, and the structure and control means for controlling so that the last recording position subsequent program area to record information to be the recording.

According to the optical information recording apparatus having such a configuration, when the recordable compact disc is unrecorded, recording of the information to be recorded is started from a position two seconds or more behind the start point of the program area. You.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating the configuration of the optical information recording apparatus according to the present embodiment.

In FIG. 1, reference numeral 1 denotes a recording disk, which is a recording medium that can be recorded and reproduced by a laser beam emitted from a pickup 2. A well-known material such as a cyanine-based dye thin film is used for the recording layer of the disk 1. As described above, a pre-groove is formed on the recording surface in advance, and the absolute reproduction time (absolute time in pre- -groove: ATIP) is recorded.

The disk 1 is rotated by a spindle motor whose rotation speed is controlled by a spindle servo system (not shown). The spindle motor of the spindle motor controls the rotation speed so that the wobbling frequency becomes a predetermined frequency. If the disk is a recorded disk, the rotation speed is controlled so that the reproduction clock has a constant frequency. To control.

The big up 2 is a focus control unit 3
The movement in the direction perpendicular to the drawing is controlled so that the beam is accurately converged on the disk, and the movement in the disk radial direction is controlled by the tracking control means 4 so that the beam follows the track on the disk.

The signal read from the pickup 2 is
The subcode is extracted by the subcode reading means 9. As described above, the subcode data includes data indicating the reproduction time of the information recorded on the disk 1, and if the disk is a recorded disk, use the subcode to select a target address. can do.

On the other hand, when the disc 1 is an unrecorded disc, since the subcode cannot be used, the absolute time on the disc is obtained using ATIP as track information.

That is, from the relation that the track is wobbled, the waveform of the tracking error signal contains a wobbling frequency component, and the frequency is modulated to represent the absolute time. Therefore, the tracking error signal from the tracking control
By supplying the signal to the P signal reading means 10, the absolute time can be detected.

Reference numeral 7 denotes a recording state detecting means for determining whether the disk is a recorded disk or an unrecorded disk, the principle of which will be described later.

Reference numeral 5 denotes a controller for controlling the recording operation, which controls the operation of the entire apparatus.

Reference numeral 6 denotes a recording signal generating means, which performs an encoding process for recording source data (not shown) on a disc;
The light is modulated, and is led to the pickup 2 as a recording signal.

Reference numeral 8 denotes a search means, which is a pickup 2
Is simply abbreviated as a transfer means for transferring in a desired mode in the radial direction, and a search operation is instructed by the controller 5 and the recording state detection means 7. The search means 8 is supplied with subcode data and ATIP data in order to know the current position.

Next, an example of the operation of the optical information recording apparatus having the above configuration when recording information on the disk 1 will be described.

First, when the disk 1 is loaded, it is first determined whether the disk is a recorded disk or a last recorded disk. This is because if the disc is a recorded disc, new data must be recorded in the program area after the last recording position. For this purpose, the recording state detection means 7 gives a search operation command to the search means 8 and instructs the search means 8 to search the PMA area. The PMA area is an area for recording a recording history of information being added, and if the disc has information once added to the program area, the history is recorded in the PMA area.

Therefore, since the recording state detecting means 7 can read the subcode in the PMA area, it can determine whether the disc is a recorded disc or an unrecorded disc based on whether the subcode can be read.

If it is determined that the recorded disk is loaded, the final recording position can be determined from the data in the PMA area, and the recording state detecting means 7 issues a search command to position the pickup 2 at the final recording position. The recording preparation operation is completed.

FIG. 2A shows the relative relationship between the disk 1 and the pickup 2 during the above operation. The disk 1 has a PMA area, a lead-in area, and a program area from the inner circumference to the outer circumference. It is understood that the information recording area exists, and the inner circumferential position of the information recording area has already been recorded (shaded area in the drawing). Therefore, the pickup is located next to the recorded area.

On the other hand, if it is determined that an unrecorded disk has been mounted, the recording state detecting means 7 immediately instructs the searching means 8 to search, for example, the position of 0: 02: 1 frame. This is because the actual pause area is specified to be 2 seconds or more.
What is necessary is just to select an appropriate search position for seconds or more. The search means 8 uses the ATIP data to search while driving the tracking control means 4 so that the pickup 2 is located at this position. In this state, the recording preparation operation is completed, and the state becomes the standby state.

FIG. 2B shows the position of the pickup 2 when an unrecorded disk is loaded. It can be seen that the position of the pickup 2 is located behind the start point of the program area.

That is, the recording operation can be started immediately by directly positioning the pickup 2 at the end point of the actual pause area without recording a silence signal for taking the actual pause area. is there.

FIG. 3 is a flowchart for explaining the above-described series of operations.

First, when it is detected in step S1 that a disk has been loaded, a process of reading the recording state of the disk is performed in step S2, and it is determined in step S3 whether a recording operation request has been issued. If the recording operation is not requested, the process returns to step S1, and if the recording operation is requested, in step S4, it is determined whether the disc is an unrecorded disc.

If the disc is a recorded disc, the last recording position is searched (step S5). If the disc is the last recorded disc, 0 minutes, 2 seconds and 1 frame are searched in step S6. Thereafter, the recording operation is started for the first time in step S7.

FIG. 4 is a flowchart showing details of the disk state detection process (step S2) in the flowchart of FIG.

First, in step S21, a search is made for a PMA area located on the inner periphery of the lead-in area, and it is determined in step S22 whether data has already been recorded there. The fact that data has already been recorded in the PMA area
Since this means that the disc is a recorded disc, the data of the PMA area which is the recording history up to that point is read in step S23, and the unrecorded flag is cleared in step S24.

On the other hand, if it is determined in step S22 that the disc is an unrecorded disc, an unrecorded flag is set in step S25.

In step S4 of FIG. 3, it is possible to easily determine whether the disc is an unrecorded disc or a recorded disc based on the presence or absence of the unrecorded flag.

Writing to the program area is performed based on the above steps. When the contents to be recorded on the disc are determined, address information such as the start time of each track is recorded in the lead-in area using the data recorded in the PMA at this time, and then silence information is recorded in the actual pause area. Record.

In this way, a lead-in area, an actual pause area, and a program area are present on the disk 1 on which the recorded contents have been determined.

When information is recorded on an unrecorded disk on which no information is recorded in the program area,
If the actual pause area is simply formed, the data from the source side may be truncated for the first two seconds.

In order to solve this, for example, it is only necessary to generate the data on the source side after forming the actual pause area. However, it is not always possible to control the data generation timing on the source side.

In consideration of such a situation, when the actual pause area is formed after the contents to be recorded on the disc are determined as in the above-described embodiment, the source side receives the data despite the formation of the actual pause area. An effect that the supply data is not cut off can also be obtained.

[0044]

As described above, according to the optical information recording apparatus of the invention according to claim 1 of the present application, the judging means for judging whether or not the information to be recorded in the program area has already been recorded. When the information to be recorded is not recorded, the control means for controlling the recording of the information to be recorded from a position two seconds or more behind the start point of the program area is provided. It is possible to automatically and reliably prevent inappropriate information from being recorded in an area to be secured.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an optical information recording apparatus according to an embodiment.

FIG. 2 is a diagram showing a relative positional relationship between a disk and a pickup.

FIG. 3 is a flowchart showing an operation example of the optical information recording apparatus.

FIG. 4 is a flowchart further illustrating an operation example of the optical information recording apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Disc 2 ... Pickup 5 ... Controller 7 ... Recording state detection means 8 ... Search means 9 ... Subcode reading means 10 ... ATIP reading means

Claims (7)

(57) [Claims] 1. An optical information recording apparatus for recording information on a recordable compact disc by a recording beam emitted from a pickup, wherein the recordable compact disc is traction information of information to be recorded on the recordable compact disc. A lead-in area for recording the information, and a program area for recording the information to be recorded, a determination means for determining whether the information to be recorded is already recorded in the program area, When the determining means determines that the information to be recorded is not recorded on the recordable compact disc, the information to be recorded is performed from a position at least two seconds behind a start point of the program area, and Judge that the information to be recorded is recorded on the recordable compact disc An optical information recording apparatus, comprising: a control unit that controls recording of the information to be recorded from the last recording position of the program area onward. 2. An optical information recording apparatus for recording information on a recordable compact disc by a recording beam emitted from a pickup, wherein the recordable compact disc is traction information of information to be recorded on the recordable compact disc. A lead-in area for recording the information, and a program area for recording the information to be recorded, a determination means for determining whether the information to be recorded is already recorded in the program area, When the judging means judges that the information to be recorded is not recorded on the recordable compact disc, the information to be recorded is read from a position behind an area required as an actual pause area from a start point of the program area. The recording is performed, and the information to be recorded is An optical information recording apparatus, comprising: control means for controlling to record the information to be recorded from the last recording position of the program area onward when it is determined that the information is recorded on the Pact disk. 3. The method according to claim 2, wherein the determining unit determines whether the information to be recorded has already been recorded in the program area, based on whether information has been recorded in the PMA area. 3. The optical information recording device according to 1 or 2. 4. The control means performs recording from a position of 0:02 when the determining means determines that the information to be recorded is not recorded on the recordable compact disc. The optical information recording device according to claim 1. 5. A recording beam emitted from a pickup to a recordable compact disc having a lead-in area for recording traction information of information to be recorded and a program area for recording the information to be recorded. An optical information recording method for recording information by: a determining step of determining whether the information to be recorded is already recorded in the program area, and the information to be recorded in the determining step If it is determined that the information to be recorded is not recorded on the recordable compact disc, the information to be recorded is recorded from a position at least two seconds behind the start point of the program area, and the information to be recorded is If it is determined that the data is recorded on a recordable compact disc, A control step of controlling the recording of the information to be recorded. 6. A recording beam emitted from a pickup to a recordable compact disc having a lead-in area for recording traction information of information to be recorded and a program area for recording the information to be recorded. An optical information recording method for recording information by: a determining step of determining whether the information to be recorded is already recorded in the program area, and the information to be recorded in the determining step If it is determined that the information is not recorded on the recordable compact disc, the information to be recorded is recorded from a position behind a necessary area as an actual pause area from a start point of the program area, and the recorded information is recorded. If it is determined that the information to be recorded is recorded on the recordable compact disc, A control step of controlling the recording of the information to be recorded from the last recording position of the program area onward. 7. The method according to claim 7, wherein the determining step determines whether or not the information to be recorded has already been recorded in the program area, based on whether or not the information has been recorded in the PMA area. 7. The optical information recording method according to 5 or 6.