JP2000311433A - Optical information recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively proceed recording operation when buffer under-run occurs at the time of recording information data to an optical information recording medium recordable thereon. SOLUTION: After a prescribed initial setting for recording, a controller 9 confirms to be ready for receiving an information data to be recorded in a signal processing part 7, checks whether or not an information data quantity enough to prepare one packet is stored in a buffer 10, and if it is not stored, the controller judges as buffer under-run, and processes a setting to stop recording so as to interrupt a packet record processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a write-once or rewritable optical disk (for example, a CD-RW disk, a DVD
The present invention relates to an optical information recording / reproducing device such as an optical disk recording / reproducing device (for example, a CD-RW drive, a DVD drive, etc.) for recording information data transferred from a host computer to a disc or the like.

[0002]

2. Description of the Related Art In an optical disk recording / reproducing apparatus for recording information data such as a document and an image on a write-once or rewritable optical disk, information information is generally transferred from a higher-level host computer using a bus-type host interface.

If the transfer of information data from the host computer is interrupted during recording, a series of information data recording is invalidated, so that the information data is not re-transferred from the beginning by the host computer and recorded again. Therefore, information data must be continuously transferred from the host computer to the optical disk recording / reproducing apparatus at a constant speed.

In particular, CDs that can be written only once
In a write-once optical disc such as an -R disc, if information data is interrupted during recording due to its media characteristics, the optical disc itself becomes invalid.

In order to solve the above-mentioned problem, a buffer is prepared in the optical disk recording / reproducing apparatus.
In many cases, means for temporarily storing information data from the host computer in a buffer before recording is used.

In this way, the recording is not interrupted if the transfer delay is within the capacity of the information data stored in the buffer, but the recording is also interrupted if the transfer delay is longer than the buffer stored information data. Such a shortage of the recording unit amount due to the transfer delay of the information data is called a buffer underrun.

In recent years, high-density recording of optical discs has been achieved, so that large-capacity information data can be recorded on one recording medium. There is a demand for faster information data transfer to the Internet. Therefore, information data transfer delay occurs more than the memory capacity of the buffer in the optical disk recording / reproducing apparatus, and the possibility of buffer underrun increases.

Therefore, in the related art, when information data recording on a rewritable optical disk fails in the packet write method, recording is performed without retransfer of information data from a host computer using information data in a buffer. Optical disk recording / reproducing apparatus that performs a coping process of resuming recording (for example, see Japanese Patent Application Laid-Open No. H10-31650).
Has been proposed.

[0009]

However, in the above-mentioned conventional optical disk recording / reproducing apparatus, the information data re-transfer from the host computer is performed by performing in-buffer management on the assumption that information data recording has failed. The error data is re-recorded with increased efficiency, and there is a problem that data recording when a buffer underrun occurs is not always efficient.

Further, the above-described processing is performed only on a rewritable optical disk, and cannot be applied to a write-once optical disk, and there is also a problem that the versatility of all recordable optical disks is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and when recording information data on a recordable optical information recording medium, efficiently performs a recording operation when a buffer underrun occurs. The purpose is to be able to be.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an optical disk having control means for recording information data on a write-once or rewritable optical information recording medium in fixed length packet units. In the information recording / reproducing apparatus, a buffer means for storing information data transferred from the host computer, a buffer management means for managing the amount of information data stored in the buffer means in packet units, and A recording management means for monitoring the recording status of the information and recording the information data, and at the time of recording the next information data by the recording management means, the buffer management means stores at least one packet of information data in the buffer means. If not, it is determined that the buffer is underrun, and the packet for recording the information data of the buffer means in packet units It is provided with a suspend packet recording process interruption means recording process.

In the optical information recording / reproducing apparatus as described above, after the packet recording processing is interrupted by the packet recording interruption means, the information data in the unrecorded state of the buffer means is held and the host computer When information data after the interruption of the packet recording process is transmitted from the device, packet recording process resuming means for obtaining unrecorded information data from the buffer unit and resuming the packet recording process from the information data may be provided.

Further, in the optical information recording / reproducing apparatus as described above, after the packet recording process is interrupted by the packet recording interrupting means, information data is transmitted from the host computer even after a predetermined time has elapsed. It is preferable to provide a packet recording process stopping means for stopping the packet recording process when the packet is not transmitted.

In the optical information recording / reproducing apparatus as described above, after the packet recording processing is interrupted by the packet recording interrupting means, information data is transmitted from the host computer even after a predetermined time has elapsed. If not transmitted, whether to stop the packet recording process as it is or to stop the packet recording process after completing the session during the recording of the information data of the optical information recording medium is performed. It is preferable to provide a coping instruction request means for requesting the host computer to issue an instruction.

Further, in the optical information recording / reproducing apparatus as described above, it is preferable to provide a fixed packet length setting means for referring to the memory capacity of the buffer means and setting the fixed packet length based on the memory capacity.

An optical information recording / reproducing apparatus according to the present invention comprises a control means for recording data in a fixed-length packet unit on a write-once or rewritable optical information recording medium (information recording medium such as a recordable optical disk). And the amount of data received from the host computer and stored in the buffer is managed in fixed packet units, and when one or more packets of information data are not stored in the buffer, a buffer underrun is determined. Then, the packet recording operation is temporarily interrupted, and the accumulation of the subsequent information data from the host computer can be waited, and the recording operation can be restarted immediately after the information data of one packet is accumulated.

Therefore, it is not necessary to perform the recording process from the beginning each time a buffer underrun occurs, and the information data recording process can be performed efficiently. Further, the write-once optical information recording medium is not wasted every time a buffer underrun occurs.

[0019]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a characteristic configuration of an optical disk recording / reproducing apparatus according to an embodiment of the present invention. First, each block will be specifically described with reference to the drawings.

In FIG. 1, the host computer 13
Is an upper host computer, such as a personal computer, outside the optical disk recording / reproducing apparatus according to the present invention and holding information data.

The host computer 13
A process for receiving information data recorded on the optical disc 1 via the optical disc recording / reproducing device, a process for transmitting information data to be recorded on the optical disc 1 to the optical disc recording / reproducing device, and the like are performed.

The optical disk recording / reproducing device is also CP
It has the following units realized by a microcomputer including U, ROM, RAM, etc., transmits information data reproduced from the optical disk 1 to the host computer 13, and records information data received from the host computer 13 on the optical disk 1. At the same time, at the time of recording, a packet recording process according to the present invention is also performed.

The optical disc 1 is an optical information recording medium such as a write-once optical disc such as a CD-R disc or a rewritable optical disc such as a CD-RW disc or a DVD disc.

A host interface unit 11 of the optical disk recording / reproducing apparatus connects the host computer 13 and the optical disk recording / reproducing apparatus by a bus type interface 12 such as SCSI or ATAPI, and exchanges information data and communication commands with the host computer 13. Send and receive Then, the data received from the host computer 13 is sent to the buffer 10 without the control of the controller 9.

The buffer 10 is a memory for temporarily storing information data received via the host interface unit 11. The signal processing unit 7 converts the information data in the buffer 10 into fixed-length packets (in units of packets of a predetermined fixed length), encodes them, and converts them into recording signals. Then, with reference to a recording address obtained from a reproduction signal from the pickup 4, the recording signal is transferred to the pickup control unit 6.

The pickup control unit 6 includes a pickup 4
Is moved to a recording address, and focusing control is performed. Further, a laser drive current is applied to the pickup 4 according to the recording signal from the signal processing unit 7. The servo control unit 3 controls the spindle motor 2 and the pickup motor 5.

The pickup motor 5 includes a servo controller 3
The pickup 4 is moved in the radial position direction of the optical disc 1 in accordance with the instruction from. The spindle motor 2 rotates the optical disc 1 according to an instruction from the servo control unit 3.

The pickup 4 includes a pickup control unit 6
Laser oscillation by the laser drive current given from the
The information data is recorded by irradiating the optical disc 1 with a laser beam. Further, the pickup 4 receives the laser reflected light from the optical disc 1 and sends a reproduction signal to the signal processing unit 7 when reproducing the information data recorded on the optical disc 1.

The controller 9 includes a servo control unit 3, a pickup control unit 6, a signal processing unit 7, a buffer 10, and a host interface unit 1 via a bus 8 indicated by a thick line in FIG.
1, the operation of each functional block is determined, and the operation is controlled in order to control various control processes such as the recording operation of the entire optical disk recording / reproducing apparatus.

Further, the controller 9 controls the mounted buffer 1 especially during the packet recording process according to the present invention.
With respect to 0, control processing for managing the information data capacity stored in the buffer 10 is performed.

That is, this optical disk recording / reproducing apparatus corresponds to an optical information recording / reproducing apparatus having control means for recording information data on a write-once or rewritable optical information recording medium in fixed length packet units. Each of the above sections performs the following functions.

First, as a function relating to the optical information recording / reproducing apparatus according to the first aspect of the present invention, a buffer means for storing information data transferred from a host computer, and information data stored in the buffer means It functions as a buffer management unit that manages the amount in packet units and a recording management unit that monitors the status of recording on the optical information recording medium and records information data.

Further, at the time of recording the next information data by the recording management means, when the buffer management means does not store the information data of one packet or more in the buffer means, it is determined that the buffer is underrun. It functions as a packet recording interruption unit for interrupting the packet recording process of recording the information data of the buffer unit in packet units.

The optical information recording / reproducing apparatus according to the second aspect of the present invention has a function of interrupting the packet recording processing by the packet recording interruption means and then rewriting the unrecorded information data of the buffer means. When the host computer transmits information data after the interruption of the packet recording process, the host computer obtains the information data in an unrecorded state from the buffer means, and resumes the packet recording process from the information data. Acts as a means.

Further, as a function of the optical information recording / reproducing apparatus according to the third aspect of the present invention, even if a predetermined time has elapsed after the packet recording processing was interrupted by the packet recording interrupting means. When the information data is not transmitted from the host computer, it functions as a packet recording process stopping means for stopping the packet recording process.

A function of the optical information recording / reproducing apparatus according to claim 4 of the present invention is that even if a predetermined time has elapsed after the packet recording process was interrupted by the packet recording process interrupting means. When the information data is not transmitted from the host computer, either the packet recording process is stopped as it is or the packet recording process is stopped after the session during the recording of the information data of the optical information recording medium is completed. And performs a function of a response instruction requesting unit that requests the host computer to issue an instruction as to whether or not to execute the response.

Further, as a function relating to the optical information recording / reproducing apparatus according to the fifth aspect of the present invention, the fixed packet length which refers to the memory capacity of the buffer means and sets the fixed packet length based on the memory capacity. Performs the function of setting means.

Next, an optical disc recording / reproducing apparatus for recording data in a fixed-length packet unit on the write-once or rewritable optical disc shown in FIG. The operation according to each claim of the invention will be described in detail.

First, the processing relating to the optical information recording / reproducing apparatus according to the first aspect of the present invention will be described. FIG. 2 shows a process of a control procedure when the controller 9 records continuous information data in units of fixed-length packets in the optical information recording / reproducing apparatus according to claim 1 of the present invention. It is a flowchart which shows.

In this control operation, the controller 9 performs a recording initial setting process which is an initial setting for performing a recording operation of information data (step (indicated by "S" in the figure) 11). This process is a series of recording preparation control up to a stage before sending information data such as a rotation instruction of the spindle motor 2 to the servo control unit 3, a pickup seek of a recording address to the pickup control unit 6, and focusing.

Next, it is determined whether or not the recording data input is OK to confirm that preparation for inputting (information) data to be recorded in the signal processing section 7 is completed (S12). At this time, information data from the host computer 13 is stored in the buffer 10 via the host interface unit 11.

Next, the controller 9 checks whether or not the buffer 10 has stored an information data amount enough to generate one packet, and determines whether or not there is one packet of (information) data in the buffer 10. Is determined (S13).

If it is determined in step 13 that the amount of information data enough to generate one packet is not stored in the buffer 10, the buffer underrun is detected in the buffer underrun process and the buffer underrun is determined (S1).
7) A recording stop setting process for ignoring the subsequent buffer transmission and interrupting the packet recording process is performed (S16).

This processing is a series of stop control such as an instruction to stop the rotation of the spindle motor 2 to the servo control unit 3, a focus off to the pickup control unit 6, and a pickup laser off.

If it is determined in step 13 (S13) that the amount of information data enough to generate one packet is stored in the buffer 10, the transfer processing for sending the information data of one packet to the signal processing unit 7 is performed. (S
14).

In this process, the controller 9
Does not pass the information data directly, but the signal processing unit 7
Control processing for permitting the transfer of the navel information data may be performed.

Then, the recording data is examined to determine whether or not the recording data is completed (S15). If the recording data is completed, a recording stop setting process is performed (S16), and this process ends. If the recording data is not completed, step 12
Returning to the processing of (S12), the recording control of the next information data is performed as described above.

In this way, the controller 9 manages the recording in the buffer 10 in packet units, and controls the recording.
Even if a buffer underrun occurs, the optical disc 1 is recorded only in packet units, so that additional recording is possible.

Next, the processing relating to the optical information recording apparatus according to the second aspect of the present invention will be described. FIG. 3 shows a case where the controller 9 detects a buffer underrun when recording continuous information data characteristic of the optical information recording apparatus according to claim 2 of the present invention in fixed-length packet units. It is a flowchart which shows the process of a control procedure.

This processing corresponds to step 17 shown in FIG.
This is performed in the buffer underrun process of (S17). In this control operation, the controller 9 determines whether or not there is one packet of (information) data in the buffer 10. If it is determined that there is no information data for one packet and the buffer is underrun, the buffer 9 The stored unrecorded information data is held as it is, the recording of the information data is interrupted, and the buffer computer 10 waits until one packet of information data is transmitted from the host computer 13 (S2).
1).

In step 21, when the information data is transmitted from the host computer 13 and it is determined that there is one packet of information data in the buffer 10, the recording is started from the recording position interrupted due to the detection of the buffer underrun. First, a preparation process for controlling each block is performed (S22).

Thereafter, it is determined whether or not recording data input OK for confirming that preparation for inputting information data to be recorded in the signal processing unit 7 (information data held in the buffer 10 in an unrecorded state before interruption) is completed. (S23).

If it is determined in step 23 that the input is OK, then the signal processor 7 sends the information data for one packet (the information data held in the buffer 10 in an unrecorded state before the interruption and the host computer). Then, a transfer process for sending the information data (combined with the information data transmitted continuously from step S13) is performed (S24), and this process ends. When the buffer underrun process control is completed, the process returns to step 12 (S12) of the recording process control shown in FIG.

In this process, the controller 9
Does not pass the information data directly, but the signal processing unit 7
Control for permitting the transfer of the umbilical information data may be performed.

As described above, after the buffer underrun is detected and the recording process is interrupted, if information data of one packet or more for generating a fixed length packet is stored in the buffer 10, the packet recording process (packet write control Since the processing is resumed, recording can be continued even if transmission from the host computer 13 is delayed, and the recording processing does not have to be repeated from the beginning every time a buffer underrun occurs.

Next, the processing relating to the optical information recording apparatus according to the third aspect of the present invention will be described. FIG. 4 shows another example when the controller 9 detects a buffer underrun when recording continuous information data characteristic of the optical information recording apparatus according to claim 3 of the present invention in fixed-length packet units. 6 is a flowchart showing a control procedure of the first embodiment.

This process is also performed by the buffer underrun process in step 17 shown in FIG. The controller 9
In this control operation, it is determined whether or not there is one packet of (information) data in the buffer 10. If it is determined that there is no information data of one packet and the buffer is underrun, the buffer 10 The information data in the recording state is held as it is, the recording of the information data is interrupted, and the information data of one packet is awaited from the host computer 13 in the buffer 10 (S31).

At step 31, 1 is stored in the buffer 10.
If it is confirmed that there is information for the packet, a preparatory operation for controlling each block to start recording from the recording position interrupted due to detection of buffer underrun is performed (S33). Thereafter, it is determined whether or not the recording data input is OK to confirm that the preparation for inputting the information data to be recorded in the signal processing unit 7 (the information data held in the buffer 10 in an unrecorded state before the interruption) is completed (S34). ).

If it is determined in step 34 that the input is OK, then the signal processor 7 sends the information data for one packet (the information data held in the buffer 10 in an unrecorded state before the interruption and the host computer). Then, a transfer process of sending the information data (combined with the information data continuously transmitted from step 13) is performed (S35).

In this process, the controller 9
Does not send the information data directly,
Control for permitting the transfer of the umbilical information data may be performed.

When the buffer underrun process control is completed, the process returns to step 12 of the recording process control shown in FIG. 2, and subsequently, information data recording is performed.

In the process of step 31 (S 31), when the process shifts to waiting for the transfer of information data from the host computer 13, the time after the buffer underrun is detected is obtained, and the preset specified time elapses. It is determined whether or not the transfer has been performed, and if it is within the specified time, the transfer of the information data is again waited (S32).

If it is determined in step 32 that the time has exceeded the specified time, the buffer underrun control is terminated, the packet recording process is stopped, and step 1 of the recording process control shown in FIG.
Returning to step 6, the recording control ends.

As described above, after detecting the buffer underrun, if the information data is not transmitted from the host computer 13 for a certain specified time or more and the information data for generating one fixed length packet is not stored in the buffer 10, the packet Since the recording process is stopped, it is possible to prevent the optical disc recording apparatus from waiting unnecessarily for the delay of the information data from the host computer 13 due to a catastrophic failure in the host computer 13 or the host interface unit 11. it can.

Next, the processing relating to the optical information recording apparatus according to the fourth aspect of the present invention will be described. FIG. 5 shows a case where the controller 9 detects a buffer underrun when recording continuous information data characteristic in fixed length packets in the optical information recording apparatus according to claim 4 of the present invention. It is a flowchart which shows another process of a control procedure.

This processing is also performed by the buffer underrun processing in step 17 shown in FIG. The controller 9
In this control operation, it is determined whether or not there is one packet of (information) data in the buffer 10. If it is determined that there is no information data of one packet and the buffer is underrun, the buffer 10 The information data in the recording state is held as it is, the recording of the information data is interrupted, and the information data for one packet is awaited from the host computer 13 in the buffer 10 (S41).

In the judgment of step 41, 1 is stored in the buffer 10.
If it is confirmed that there is information for the packet, a preparatory operation for controlling each block to start recording from the recording position interrupted due to detection of buffer underrun is performed (S48). Thereafter, it is determined whether or not the recording data input is OK to confirm that the preparation for inputting the information data to be recorded in the signal processing unit 7 (the information data held in the buffer 10 in an unrecorded state before the interruption) is completed (S49). ).

If it is determined in step 49 that the input is OK, then the signal processing unit 7 sends the information data for one packet (the information data held in the buffer 10 in an unrecorded state before the interruption and the host computer). Then, a transfer process of sending the information data (combined with the information data continuously transmitted from step 13) is performed (S50).

In this process, the controller 9
Does not send the information data directly,
Control for permitting the transfer of the umbilical information data may be performed.

When the buffer underrun process control is completed, the process returns to step 12 of the recording process control shown in FIG. 2, and subsequently, information data recording is performed.

In the process of step S41, when the process waits for the transfer of the information data from the host computer 13, the time after the buffer underrun is detected is obtained, and whether or not a predetermined time has elapsed is determined. Then, if it is within the specified time, transfer of the information data is waited again (S42).

If it is determined that the predetermined time has elapsed, the host computer 13 is requested via the host interface unit 11 to take measures to stop recording due to a buffer underrun (S43).

In this case, the host computer 13 performs either of the following measures: the packet recording processing is stopped as it is, or the packet recording processing is stopped after the session during the recording of the information data on the optical disc 1 is completed. Request instructions.

Then, it waits for a reply from the host computer 13 and determines whether or not there is a reply (S44).
If there is a reply, it is determined whether or not the content of the reply is a session completion write designation (S45). If it is not a session completion write designation but a stop instruction as it is, the buffer underrun process control is terminated and FIG. Returning to step 16 (S16) of the recording process control, the packet recording process is stopped, and the control ends.

If it is determined in step 45 that the content of the reply is a request to specify session completion writing, track information is recorded on the track of the optical disc 1 where recording was interrupted (S46), and the lead-in which is session information is recorded. ,
Information such as lead-out is recorded (S47).

Then, after the buffer underrun process control is completed, the recording process control step 16 (S16) of FIG. 2 is performed.
Then, the packet recording process is stopped and the control is terminated.

As described above, after detecting the buffer underrun, if the information data is not transmitted from the host computer 13 for a certain specified time or more and the buffer 10 does not store the information data for generating one fixed length packet,
The host computer 13 is requested to stop the packet recording process as it is, or to stop the packet recording process after completing the session during the recording of the optical disc, and to respond to the stop process. A packet recording process result is obtained.

Next, the processing relating to the optical information recording apparatus according to claim 5 of the present invention will be described. FIG. 6 shows a process of an initial setting control procedure when the controller 9 records continuous information data characteristic in fixed-length packets in the optical information recording apparatus according to claim 5 of the present invention. It is a flowchart.

This process is performed in the initial setting process of step 11 shown in FIG. In this control operation, the controller 9 obtains the memory capacity of the mounted buffer 10 (S51), calculates one fixed packet length of the information data at the time of the packet recording processing based on the memory capacity, and (S5)
2).

There are various ways of setting the fixed packet length by the fixed packet length calculation processing, such as setting the same or half of the installed buffer capacity.

For example, if the fixed packet length is made equal to the buffer capacity of the buffer 10, the packet length can be maximized and the amount of information data to be recorded on the optical disk 10 can be increased. More often.

Further, if the fixed packet length is made smaller than the buffer capacity of the buffer 10, the buffer underrun is less likely to be detected, but the amount of information data recorded on the optical disk 1 is reduced.

Here, as long as the fixed packet length is determined in consideration of the balance with the buffer capacity of the mounted buffer 10, it does not matter whether the setting is from any viewpoint. It may be set as appropriate according to the user's request.

After the processing of step 53, the servo control unit 3
A series of recording preparation control processes (S53) up to a stage before sending information data such as a rotation instruction of the spindle motor 2 to the pickup control unit 6 and a recording address pickup seek and focusing to the pickup control unit 6 are performed, and step 12 in FIG.
Proceeding to (S12), the packet recording process is started.

As described above, by defining the fixed packet length to be an arbitrary length with respect to the memory amount of the buffer 10, recording according to the current mounting state of the buffer memory becomes possible, and the recording is performed in accordance with the performance of the optical disk apparatus. Thus, an appropriate packet recording process can be performed.

As described above, the optical disk recording apparatus of this embodiment has the function of the optical information recording apparatus according to the first aspect of the present invention, so that the controller 9 can buffer the fixed-length packet unit. If the amount of information data required to generate one packet at the time of recording is not in the buffer 10, it is detected that the buffer is underrun, so that a problem occurs in information data transfer from the host computer 13. Even if the recording is interrupted during the recording, it is possible to guarantee that the actual recording on the optical disk 1 can be performed in a predetermined packet unit.

Therefore, the information data not recorded due to the buffer underrun and the address to be recorded are always in units of packets, and thereafter, re-recording by a new packet write becomes possible.

Further, by providing the function of the optical information recording apparatus according to the second aspect of the present invention, the controller 9 is provided.
When a buffer underrun is detected, the recording is interrupted in units of fixed-length packets until the data in the buffer 10 is filled. Therefore, even if the information data from the host computer 13 is interrupted and transmitted, re-recording is performed. It becomes possible to record without repeating.

Further, by providing the function of the optical information recording apparatus according to the third aspect of the present invention, when the controller 9 detects a buffer underrun, a failure occurs in the host computer 13 or the host interface unit 11. Since the recording control operation is stopped after the specified time even when the information
It is possible to prevent the optical disk recording device from waiting for unnecessary data.

Further, by providing the function of the optical information recording device according to claim 4 of the present invention, the controller 9
Automatically detects a buffer underrun and causes a failure in the host computer 13 or the host interface unit 11 and automatically stops the transmission of the host computer 13 after a specified time even when the information data is not transmitted from when it is present.
Create a session with the recording up to that point, and make it into a format that can be read by another optical disk playback device or another multi-read optical disk playback device, or leave the optical disk in a state where additional recording can be performed again It is possible for the user to select whether or not to use the stop mode.

Further, by providing the function of the optical information recording device according to claim 5 of the present invention, the buffer 10
Since the length of the fixed packet is specified for the amount of memory, the recording can be performed in consideration of the frequency of occurrence of buffer underrun and the validity of the total amount of recording information in accordance with the mounting state of the buffer memory.

[0092]

As described above, according to the optical information recording apparatus of the present invention, when recording information data on a recordable optical information recording medium, the recording operation performed when a buffer underrun occurs. Can be advanced efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a characteristic configuration of an optical disk recording device according to an embodiment of the present invention.

FIG. 2 is a control procedure when the controller 9 shown in FIG. 1 records information data in units of fixed-length packets of characteristic continuous information data in the optical information recording apparatus according to claim 1 of the present invention. 6 is a flowchart showing the processing of FIG.

FIG. 3 detects a buffer underrun when the controller 9 shown in FIG. 1 records characteristic continuous information data in fixed length packet units in the optical information recording apparatus according to claim 2 of the present invention. It is a flowchart which shows the process of the control procedure at the time of doing.

FIG. 4 detects a buffer underrun when the controller 9 shown in FIG. 1 records characteristic continuous information data in fixed length packet units in the optical information recording apparatus according to claim 3 of the present invention. 10 is a flowchart showing another control procedure when the control is performed.

FIG. 5 detects a buffer underrun when the controller 9 shown in FIG. 1 records characteristic continuous information data in fixed length packets in the optical information recording apparatus according to claim 4 of the present invention. 13 is a flowchart illustrating still another process of the control procedure when the control is performed.

FIG. 6 shows an initial setting control procedure when the controller 9 shown in FIG. 1 records continuous information data characteristic in fixed-length packets in the optical information recording apparatus according to claim 5 of the present invention. It is a flowchart which shows a process.

[Explanation of symbols]

 1: optical disk 2: spindle motor 3: servo control unit 4: pickup 5: pickup motor 6: pickup control unit 7: signal processing unit 8: bus 9: controller 10: buffer 11: host interface unit 12: bus interface 13: Host computer

Claims (5)

[Claims] 1. An optical information recording / reproducing apparatus provided with control means for recording information data in a fixed-length packet unit on a write-once or rewritable optical information recording medium. Buffer means for storing, buffer management means for managing the amount of information data stored in the buffer means in packet units, and recording management means for monitoring the status of recording on the optical information recording medium and recording information data When the next information data is recorded by the recording management means, if the buffer management means does not store information data of one packet or more in the buffer means, it is determined that a buffer underrun has occurred, Packet recording processing interruption means for interrupting packet recording processing for recording information data in packet units is provided. The optical information recording and reproducing apparatus according to claim and. 2. The optical information recording / reproducing apparatus according to claim 1, wherein after the packet recording processing is interrupted by the packet recording processing interrupting means, the information data in an unrecorded state of the buffer means is held, and When information data after the interruption of the packet recording process is transmitted from the computer, packet recording process resuming means for obtaining unrecorded information data from the buffer unit and resuming the packet recording process from the information data is provided. Characteristic optical information recording / reproducing device. 3. The optical information recording / reproducing apparatus according to claim 1, wherein the packet recording process is interrupted by the packet recording process interrupting means, and the packet recording process is interrupted by the host computer even after a predetermined time has elapsed. An optical information recording / reproducing apparatus, comprising: a packet recording process stopping means for stopping the packet recording process when information data is not transmitted. 4. The optical information recording / reproducing device according to claim 1, wherein the packet recording process is interrupted by the packet recording process interrupting unit, and the packet recording process is interrupted by the host computer even after a predetermined time has elapsed. If the information data has not been transmitted, either the packet recording process is stopped as it is or the packet recording process is stopped after the session during the recording of the information data on the optical information recording medium is completed. An optical information recording / reproducing apparatus provided with a coping instruction requesting means for requesting the host computer to give an instruction as to whether or not to execute the instruction. 5. The optical information recording / reproducing apparatus according to claim 1, wherein the fixed packet length is set based on a memory capacity of the buffer unit and based on the memory capacity. An optical information recording / reproducing apparatus comprising a packet length setting means.