JP2010020834A - Optical disk recording/reproducing device and optical disk recording/reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk recording/reproducing and an optical disk recording/reproducing method by which information can be recorded in an optical disk in a high recording quality. <P>SOLUTION: In the optical disk recording/reproducing device 1 performing recording/reproducing of information for an optical disk 3, the device includes: an error rate detecting part 25 and a jitter detecting part 26 detecting an error rate and jitter indicating recording quality of the data by reproducing recorded data when discrimination information is obtained from an optical disk 1 and data is recorded in an optical disk 3; and a display part 30 displaying recording quality of data recorded in the optical disk 3 based on the error rate and jitter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disc recording / reproducing apparatus and an optical disc recording / reproducing method for recording and reproducing information with respect to an optical disc.

Conventionally, as an optical disc recording / reproducing apparatus of this type, when an error rate becomes a value equal to or greater than a predetermined threshold per unit time, it is determined that the optical disc on which information is recorded is deteriorated and a signal for instructing backup is generated. What was made into is known (for example, refer patent document 1).
JP 2006-164332 A

  However, in the conventional optical disc recording / reproducing apparatus, it is possible to know whether or not a recording error has occurred so as to stop recording during recording, but it is impossible to know the recording quality of information recorded on the optical disc. . Therefore, for example, there is a problem that information that cannot be recorded again such as information that is desired to be recorded with high quality or write-once content is recorded with low recording quality.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an optical disc recording / reproducing apparatus and an optical disc recording / reproducing method capable of recording information on an optical disc with high recording quality. is there.

  In order to achieve the above-described object, the present invention provides an optical disc recording / reproducing apparatus for recording and reproducing information on an optical disc, acquiring an identification information from the optical disc, and recording the information on the optical disc. A recording unit that reproduces the recorded information and detects recording quality information indicating the recording quality of the information, and determines the recording quality of the information recorded on the optical disc based on the recording quality information. An optical disc recording / reproducing apparatus including a display unit for displaying is proposed.

  According to the optical information reproducing apparatus, when information is recorded on the optical disc, the recorded information is reproduced, and the recording quality information indicating the recording quality of the information is detected. Based on the recording quality information, the optical disc Since the recording quality of the recorded information is displayed, it is possible to know the recording quality of the information while recording the information on the optical disc.

  According to another aspect of the present invention, there is provided an optical disc recording / reproducing method for recording and reproducing information with respect to an optical disc, in order to achieve the above-mentioned object, a first step of acquiring identification information from the optical disc, and the information on the optical disc A second step of reproducing the recorded information and detecting recording quality information indicating the recording quality of the information during recording; and the information recorded on the optical disc based on the recording quality information An optical disc recording / reproducing method including a third step of displaying the recording quality of the recording medium is proposed.

  According to this optical disc recording / reproducing method, when information is recorded on the optical disc, the recorded information is reproduced to detect the recording quality information indicating the recording quality of the information, and the optical disc is detected based on the recording quality information. Since the recording quality of the recorded information is displayed, it is possible to know the recording quality of the information while recording the information on the optical disc.

  According to the present invention, it is possible to know the recording quality of information while recording information on the optical disc. As a result, for example, information that cannot be recorded again, such as information that is desired to be recorded with high quality or write-once content, can be stopped when recording on a single optical disk with low recording quality, and the information can be Can be recorded with high recording quality.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  First, the configuration of the optical disc recording / reproducing apparatus according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram illustrating a schematic configuration of an optical disc recording / reproducing apparatus according to the present invention. The optical disc recording / reproducing apparatus 1 corresponds to a multilayer optical disc, and is configured to record data on the optical disc 3 or reproduce data recorded on the optical disc 3 in response to a request from the host computer 2.

  The microcomputer unit 10 includes a CPU (Central Processing Unit), a communication interface 10A that enables communication with the host computer 2, and a memory 10B that stores various control programs. The microcomputer unit 10 receives a command received from the host computer 2 or a digital signal processor (DSP) 11 via a communication interface 10A configured by, for example, ATAPI (ATA Packet Interface). Necessary control processing and arithmetic processing are executed based on various information.

  For example, when a recording command is transmitted from the host computer 2, the microcomputer unit 10 drives the spindle motor 14 via the motor control unit 12 and the motor drive circuit 13 in the digital signal processor (DSP) 11. Thus, the optical disk 3 loaded in a predetermined state is rotated in a rotation state corresponding to the recording method (for example, CLV (Constant Linear Velocity) method, CAV (Constant Angular Velocity), etc.).

  Further, the microcomputer unit 10 drives the slide motor 16 of the movement / guide mechanism unit 15 through the motor control unit 12 and the motor drive circuit 13 in the digital signal processor (DSP) 11 as necessary. Then, the optical pickup 17 is moved in the radial direction of the optical disc 3.

  A digital signal processor (DSP) 11 performs predetermined signal processing such as modulation processing in a recording signal generation unit 18 on data to be recorded provided from the host computer 2 via the microcomputer unit 10 to perform signal processing. Is output to a laser diode drive circuit (LDD) 19 in the optical pickup 17. The laser diode drive circuit (LDD) 19 drives the laser diode (LD) 20 in a blinking manner by applying to the laser diode (LD) 20 a pulse-like drive signal that is strategy-controlled based on the input recording signal. .

  At this time, a biaxial actuator (not shown) that holds the objective lens 21 moves the objective lens 21 to a predetermined position with respect to the optical disc 3 under the control of the microcomputer unit 10.

  As a result, a laser beam blinking in a pattern corresponding to the data to be recorded is emitted from the laser diode (LD) 20 and is condensed on a desired recording layer of the optical disc 3 through the objective lens 21. Thereby, the data to be recorded is recorded on the optical disc 3.

  The reflected light of the laser light on the multilayer optical disk 3 is condensed on the light receiving unit 22 in the optical pickup 17 via the objective lens 21. The light receiving unit 22 is constituted by, for example, a four-divided photodetector, and an analog waveform RF (Radio Frequency) signal obtained by photoelectrically converting incident reflected light is converted into an analog front end (AFE). ) Is output to 23.

  The analog front end (AFE) 23 performs predetermined analog processing such as amplification and waveform shaping processing on the input RF signal, and converts the digital waveform RF signal obtained by the analog processing into a digital signal processor ( DSP) 11 to the reproduction signal processing unit 24.

  The reproduction signal processing unit 24 performs predetermined signal processing such as demodulation processing on the input RF signal, and generates various servo signals such as a focus error signal and a tracking error signal based on the reproduction signal obtained by the signal processing. Generate. Based on the generated focus error signal and tracking error signal, a biaxial actuator (not shown) in the optical pickup 17 is controlled, thereby performing focus control and tracking control.

  On the other hand, when a reproduction command is transmitted from the host computer 2, the microcomputer unit 10 rotates the optical disc 3 in a rotation state corresponding to the recording method, as in the case where the recording command is transmitted. The microcomputer unit 10 controls the recording signal generation unit 18 of the digital signal processor (DSP) 11 to output a predetermined driving signal to the laser driving circuit (LDD) 19 in the optical pickup 17.

  The laser drive circuit (LDD) 19 drives and drives the laser diode (LD) 20 with a predetermined voltage based on the input drive signal. As a result, laser light with a predetermined power is emitted from the laser diode 20 (LD), and the laser light is condensed on a desired recording layer of the optical disc 3 through the objective lens 21.

  The reflected light of the laser beam on the optical disk 3 is photoelectrically converted by the light receiving unit 22 in the optical pickup 17, and the analog waveform RF signal obtained by the photoelectric conversion is converted to analog as in the case where the recording command is transmitted. The signal is converted into an RF signal having a digital waveform at the front end (AFE) 23 and output to the reproduction signal processing unit 24 of the digital signal processor (DSP) 11.

  The reproduction signal processing unit 24 performs reproduction signal processing such as demodulation processing on the input RF signal, and outputs a reproduction signal obtained by the reproduction signal processing to the microcomputer unit 10. The microcomputer unit 10 transmits the input reproduction signal to the host computer 2 via the communication interface 10A.

  Further, the reproduction signal processing unit 24 generates servo signals such as a focus error signal and a tracking error signal based on the reproduction signal obtained by the reproduction signal processing, similarly to the case where the above-described recording command is transmitted. Based on the generated focus error signal and tracking error signal, focus control, tracking control, and the like are performed as in data recording.

  In the present embodiment, when data is recorded on the optical disc 3, the microcomputer unit 10 includes a digital signal processor (DSP) 11 and a movement / guide mechanism unit via the digital signal processor (DSP) 11. By controlling the 15 slide motors 16 and the laser diode drive circuit (LDD) 19 of the optical pickup 17, the media ID recorded at the time of manufacturing the optical disk 3 is read, and the read media ID is read via the communication interface 10A to the host computer. 2 to send.

  Further, when data is recorded on the optical disc 3, the microcomputer unit 10 stops recording at predetermined intervals and reproduces a predetermined amount of data at the recording head portion. The reproduction signal obtained at this time is output from the reproduction signal processing unit 24 of the digital signal processor (DSP) 11 to the error rate detection unit 25 and the jitter detection unit 26. The predetermined interval may be constant regardless of time, physical distance, data amount, or the like. In this embodiment, the data at the beginning of recording is reproduced. However, the present invention is not limited to this, and data at the end of recording may be used.

  The error rate detection unit 25 measures the error rate of the input reproduction signal by a method such as a block error occurrence rate (BLER) and outputs the measurement result to the microcomputer unit 10. The jitter detector 26 measures the jitter value of the input reproduction signal by using, for example, a TIA (Time Interval Analyzer) function, and outputs the measurement result to the microcomputer unit 10. The microcomputer unit 10 transmits the input error rate and jitter to the host computer 2 via the communication interface 10A. As described above, since the data recorded on the optical disc 3 is reproduced by a predetermined amount at predetermined intervals and the error rate and jitter are detected, the time required for reproduction is reduced compared with the case of reproducing all the recorded data. In addition to shortening, it is possible to extract recorded data as samples at regular intervals.

  In this embodiment, the error rate and the jitter are detected as information indicating the recording quality of the data recorded on the optical disc 3, but the present invention is not limited to this, and only one of them may be detected. However, other information may be detected.

  The host computer 2 includes a CPU (Central Processing Unit), a communication interface 2A that enables communication with a microcomputer unit, and a memory 2B that stores various control programs. The host computer 2 transmits various commands to the microcomputer unit 10 via the communication interface 2A, and receives a media ID, an error rate, and jitter from the microcomputer unit 10. The host computer 2 determines the rank of the recording quality of the data recorded on the optical disc 3 from a plurality of ranks based on the error rate and jitter, and is connected to the host computer 2 with the media ID and the determined rank. And is stored in the recording quality table 27 stored in the memory 2B.

  The display unit 30 is a monitor composed of, for example, an LCD (Liquid Crystal Display) or the like, and displays the media ID and rank input from the host computer as the recording quality of the data recorded on the optical disc 3. The optical disc recording / reproducing apparatus 1 includes the display unit 30 and displays the media ID and rank on the display unit 30. However, the present invention is not limited to this, and an external display connected to the optical disc recording / reproducing apparatus 1 or the like. The media ID and rank may be displayed.

  FIG. 2 is a data configuration diagram illustrating an example of the recording quality table. As shown in FIG. 2, the recording quality table 27 is for holding the recording quality of the data recorded on the optical disc 3 by the optical disc recording / reproducing apparatus 1, and one record (row) is added for each recording. Is done. The recording quality table 27 includes a media ID column 27A, a rank column 27B, and a date / time column 27C.

  The media ID column 27A stores the media ID received from the microcomputer unit 10, and uniquely identifies, for example, the manufacturer of the optical disc, the type of the optical disc such as DVD-R, the maximum recording speed, and the OEM (Original Equipment Manufacturer). Possible identifiers are stored. In the rank column 27B, the recording quality of the data recorded on the optical disc 3 based on the error rate, the jitter, and a predetermined threshold value from a plurality of ranks, for example, five ranks “A” to “E”. Is determined by the host computer 2, and the determined rank is stored. The date and time column 27C stores the date and time when the rank stored in the rank column 27B is determined. Thus, since the media ID and the determined rank are stored, it is possible to refer to the recording quality of data recorded on the optical disc 3 in the past.

  In this embodiment, the rank determined based on the error rate and jitter is stored. However, the present invention is not limited to this. For example, the error rate and jitter itself are stored, and the stored error is stored as necessary. The rank may be determined from the rate and jitter.

  Next, a recording process of the optical disc recording / reproducing apparatus according to the present invention will be described with reference to FIGS. FIG. 3 is a flowchart for explaining a recording process of the optical disc recording / reproducing apparatus shown in FIG. In the following description, unless otherwise stated, it is assumed that the playback time is set as a time for playback at predetermined intervals, and the playback data amount is set in advance as a predetermined amount when data is played back.

  As shown in FIG. 3, when recording data on the optical disc 3 loaded in the optical disc recording / reproducing apparatus 1, the host computer 2 generates a recording command (S101), and the generated recording command is recorded as data to be recorded. At the same time, it is transmitted to the microcomputer unit 10. Receiving the recording command, the microcomputer unit 10 acquires the media ID recorded in the management area on the inner circumference side of the loaded optical disk 3 (S102), and transmits the acquired media ID to the host computer 2.

  Next, the microcomputer unit 10 records the data to be recorded received from the host computer 2 on the optical disc 3 for each predetermined unit, for example, for each block (S103). Next, the microcomputer unit 10 determines whether or not to continue recording data on the optical disc 3 based on whether or not the recording end command transmitted from the host computer 2 is received (S104). In the present embodiment, the microcomputer unit 10 determines whether or not to continue recording based on whether or not the recording end command is received. However, the present invention is not limited to this. For example, the microcomputer 10 records the data to be recorded together with the recording command. A data amount may be received, and it may be determined whether to continue recording based on whether the received data amount has reached the data amount.

  As a result of the determination in S104, when recording data on the optical disc 3 is continued, the microcomputer unit 10 determines whether or not the set reproduction time has been reached based on the elapsed time measured by its own timer function. (S105). As a result of the determination in S105, when the set reproduction time is reached, the microcomputer unit 10 reproduces the data recorded on the optical disc 3 (S106). The data to be reproduced is determined by the reproduction address and the number of reproduction blocks calculated from the set reproduction time and reproduction data amount. In the present embodiment, the interval between playbacks and the amount of playback data are set in advance. However, the present invention is not limited to this. For example, at least one of the playback time and the amount of playback data is changed for each type of optical disc. Also good. Thereby, the recording quality of the data recorded on the optical disc 3 can be detected in accordance with the characteristics of the optical disc 3.

  When the reproduction signal of the reproduced data is output from the reproduction signal processing unit 24 of the digital signal processor (DSP) 11 to the error rate acquisition unit 25 and the jitter acquisition unit 26, the error rate detection unit 25 detects an error from the reproduction signal. While detecting the rate, the jitter detection unit 26 detects jitter from the reproduction signal (S107), and the microcomputer unit 10 transmits the detected error rate and jitter to the host computer 2.

  The host computer 2 determines the rank of the recording quality of the data recorded on the optical disc 3 based on the error rate and jitter received from the microcomputer unit 10 (S108). The rank may be determined from only one of the error rate and jitter, or may be determined based on one as the main and the other as the sub. For example, the rank determination method may be changed depending on the type of the optical disc 3.

  Next, the host computer 2 displays the media ID acquired in the process of S102 and the rank determined in the process of S108 on the display unit 30 (S109). As described above, when data is recorded on the optical disc 3, the recorded data is reproduced to detect the error rate and jitter indicating the recording quality of the data, and determined based on the error rate and jitter. Since the recording quality rank of the data recorded on the optical disc 3 is displayed, it is possible to know the recording quality of the data while recording the data on the optical disc 3.

  FIG. 4 is an image diagram illustrating an example of a screen displayed on the display unit illustrated in FIG. 1. As shown in FIG. 4, the recording screen G01 includes, for example, a manufacturing company corresponding to the media ID of the optical disk 3, optical disk information G01A such as type and maximum recording speed, and a progress bar indicating the progress of data recording on the optical disk 3. G01C and rank G01B indicating the recording quality in the corresponding section are displayed. Also, a cancel button G01D is displayed on the recording screen G01, and the user can stop recording data on the optical disc 3 by operating the cancel button G01C. As described above, the rank of the recording quality of the data recorded on the optical disc 3 is determined based on the error rate and jitter, and the rank is displayed. Therefore, the recording quality of the data recorded on the optical disc 3 is relatively set. Can be represented.

  In this embodiment, the rank is displayed as the recording quality of the data recorded on the optical disc 3, but the present invention is not limited to this. For example, an error rate and / or jitter may be displayed.

  After the process of S109, the microcomputer unit 10 returns to the process of S103. Also, if the set playback time has not been reached as a result of the determination in S105, the microcomputer unit 10 returns to the process in S103.

  When the recording of data on the optical disc 3 is terminated as a result of the determination in S104, the microcomputer unit 10 performs a recording end process such as finalization (S110), and ends the recording of data on the optical disc 3. At the same time, the host computer 2 determines the overall rank of the recording quality of the data recorded on the optical disc 3 based on the one or more ranks determined in S108 (S111). The overall rank may be determined from the average of the ranks determined for each playback time on the optical disc 3. For example, the rank of the inner peripheral portion of the optical disc is emphasized depending on the type and recording speed of the optical disc 3. Or, it may be determined by weighting each rank, such as placing importance on the rank of the outer peripheral portion.

  Next, the host computer 2 displays the media ID acquired in the process of S102 and the overall rank determined in the process of S111 on the display unit 30 (S112).

  FIG. 5 is an image diagram illustrating an example of a screen displayed on the display unit illustrated in FIG. 1. As shown in FIG. 5, the recording end screen G02 displays optical disc information G02A, progress bar G02C, and rank G02B similar to the optical disc information G01A, progress bar G01C, and rank G01B described above, and the overall rank. G02D is displayed. If there is a record (row) with the same media ID in the recording quality table 27, based on the rank stored in the rank column 27B in the record (row) and the overall rank determined in the process of S111. The accumulated rank reflecting the history of the past general rank may be displayed.

  Next, the host computer 2 stores the media ID acquired in S102, the overall rank determined in S111, and the current date and time in the media ID column 27A and rank column of the recording quality table 27 stored in the memory 2B. 27B and the date / time field 27C respectively (S113), the microcomputer unit 10 and the host computer 2 end the recording process. In the present embodiment, the overall rank determined in the process of S111 is stored. However, the present invention is not limited to this, and each rank determined in the process of S108 may be recorded or determined in the process of S108. Each rank and the overall rank determined in S111 may be stored.

  In the present embodiment, the host computer 2 determines a rank based on the error rate and jitter, displays the rank on the display unit 30, and stores the rank in the memory 2B. However, the present invention is not limited to this. You may comprise so that the microcomputer part 10 may perform one part or all part among the determination of a rank, the display to the display part 30, and the memory | storage of a rank.

  As described above, according to the present invention, when data is recorded on the optical disc 3, the recorded data is reproduced, and the error rate and jitter indicating the recording quality of the data are detected. Since the rank of the recording quality of the data recorded on the optical disc 3 determined based on this is displayed, it is possible to know the recording quality of the data while recording the data on the optical disc 3. As a result, for example, information that cannot be recorded again, such as information that is desired to be recorded with high quality or write-once content, can be stopped when recording on a single optical disk with low recording quality, and the information can be Can be recorded with high recording quality.

  Also, since the rank of the recording quality of the data recorded on the optical disc 3 is determined based on the error rate and jitter, and the rank is displayed, the recording quality of the data recorded on the optical disc 3 is relatively represented. Can do. As a result, the recording quality of the data recorded on the optical disc 3 can be easily understood by the user.

  Further, since the media ID and the determined rank are stored, it is possible to refer to the recording quality of data recorded on the optical disc 3 in the past. Thereby, before recording data on the optical disc 3, the rank of the data recorded on the optical disc 3 having the same recording medium ID can be known, and an optical disc compatible with the optical disc recording / reproducing apparatus 1 can be selected. .

  Further, since the error rate and jitter are detected by reproducing a predetermined amount of data recorded on the optical disc 3 at predetermined intervals, the time required for reproduction is shortened compared with the case of reproducing all the recorded data. In addition, it is possible to extract recorded data as samples at regular intervals. Thereby, the error rate and jitter indicating the recording quality of the data recorded on the optical disc 3 can be appropriately detected in a short time.

  In addition, since at least one of the reproduction time and the reproduction data amount is changed, the recording quality of the data recorded on the optical disc 3 can be detected according to the characteristics of the optical disc 3.

  In addition, the structure of this invention is not limited only to the above-mentioned embodiment, You may add a various change within the range which does not deviate from the summary of this invention.

1 is a block diagram illustrating a schematic configuration of an optical disc recording / reproducing apparatus according to the present invention. It is a data block diagram explaining an example of a recording quality table. 3 is a flowchart for explaining a recording process of the optical disc recording / reproducing apparatus shown in FIG. It is an image figure explaining an example of the screen displayed on the display part shown in FIG. It is an image figure explaining an example of the screen displayed on the display part shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical disk recording / reproducing apparatus, 2 ... Host computer, 2a ... Memory, 3 ... Optical disk, 10 ... Microcomputer part, 25 ... Error rate detection part, 26 ... Jitter detection part, 27 ... Recording quality table, 30 ... Display part.

Claims (10)

In an optical disc recording / reproducing apparatus for recording and reproducing information on an optical disc,
An acquisition unit for acquiring identification information from the optical disc;
A detection unit that reproduces the recorded information and detects recording quality information indicating the recording quality of the information when the information is recorded on the optical disc;
An optical disc recording / reproducing apparatus comprising: a display unit configured to display a recording quality of the information recorded on the optical disc based on the recording quality information. A determination unit for determining a recording quality rank of the information recorded on the optical disc from a plurality of ranks based on the recording quality information;
The optical disc recording / reproducing apparatus according to claim 1, wherein the display unit displays the determined rank. The optical disc recording / reproducing apparatus according to claim 2, further comprising a storage unit that stores the identification information and the determined rank. The optical disc recording / reproducing apparatus according to claim 1, wherein the detection unit reproduces a predetermined amount of the recorded information at predetermined intervals to detect the recording quality information. The optical disc recording / reproducing apparatus according to claim 4, further comprising a changing unit that changes at least one of the predetermined interval and the predetermined amount. In an optical disc recording / reproducing method for recording and reproducing information on an optical disc,
A first step of obtaining identification information from the optical disc;
A second step of detecting the recording quality information indicating the recording quality of the information by reproducing the recorded information when the information is recorded on the optical disc;
And a third step of displaying a recording quality of the information recorded on the optical disc based on the recording quality information. An optical disc recording / reproducing method comprising: The third step includes a step of determining a recording quality rank of the information recorded on the optical disc from a plurality of ranks based on the recording quality information, and a step of displaying the determined rank. The optical disc recording / reproducing method according to claim 6, comprising: The optical disc recording / reproducing method according to claim 7, wherein the third step includes a step of storing the identification information and the determined rank. The optical disc recording / reproducing method according to claim 6, wherein the second step includes a detecting step of reproducing the recorded information by a predetermined amount at predetermined intervals to detect the recording quality information. The optical disc recording / reproducing method according to claim 9, wherein the second step includes a step of changing at least one of the predetermined interval and the predetermined amount before the detecting step.

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