JP2005310232A - Recording and reproducing device for optical recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the recording and reproducing device for an optical recording medium capable of performing quick recording and reproduction. <P>SOLUTION: This recording and reproducing device of the optical recording medium which performs recording and reproduction by discriminating the kind of an optical recording medium is constituted of; a storage means 4 in which a plurality of all programs corresponding to all kinds of optical recording mediums are stored; a servo system control means 5 which has a storage part 5A for storing a received light signal to be obtained from the reflected light of the optical recording medium and a rewritable program execution area 5B, and which executes a first program of the optical recording medium; and a system control type control means 6 which has a discrimination table 6A with which the kind of the optical recording medium can be discriminated in accordance with the received light, and which outputs a second program to the rewritable program execution area 5B only when the first program is not a program for executing the optical recording medium by comparing the received light signal of the storage part 5A with the discrimination table, and which makes the servo system control means 5 execute a third program in which the second program is incorporated into the first program. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording / reproducing apparatus for an optical recording medium that performs servo control by executing a program corresponding to the type of the optical recording medium.

  Various types of disc-shaped optical recording media have been developed. As a disc having a diameter of 12 cm, there are a plurality of types such as CD (compact disc), CD-ROM, video CD, and DVD (digital versatile disc). Has been put to practical use. These discs have various data formats, compression methods, data recording densities, etc. for information to be recorded, but all have a diameter of 12 cm and can read data with an optical head (optical pickup). A recording / reproducing apparatus that can be used for a plurality of types of discs has been developed.

Usually, such a recording / reproducing apparatus is driven by computer control using a program. As this computer control, for example, there is one described in Patent Document 1.
That is, Patent Document 1 discloses a first CPU having a read function for reading boot execution data held in a memory card and a boot execution function for executing boot execution data by a boot sequence, read from the memory card. A RAM for storing boot execution data, a ROM for storing boot execution data executed by a boot sequence as unchangeable, an information processing apparatus including an image processor for image processing, and boot execution data to be executed at boot A memory card including a flash memory to hold, a transmission function for transmitting the boot execution data to the information processing apparatus, and a second CPU for performing data management,
It is described that the images displayed by the boot sequence have diversity.
JP 2000-47876 A

An optical recording medium recording / reproducing apparatus according to the type of optical recording medium using such a computer has been performed as follows. FIG. 12 is a schematic diagram showing a conventional recording / reproducing apparatus for an optical recording medium.
As shown in FIG. 12, a recording / reproducing apparatus 10 for an optical recording medium includes a semiconductor laser 3 that emits laser light, a first drive unit 2 that drives the semiconductor laser 3, and the laser light on an optical recording medium (not shown). The optical pickup 7 that collects light, rotates the disk, focuses, tracks, etc., reads information on the optical recording medium (not shown) or records information on the optical recording medium (not shown), and laser light emitted from the semiconductor laser 3 A system IC 8 that performs modulation control, and a determination unit 6A that determines the type of the optical recording medium (not shown), and the first drive so that the laser beam has a recording / reproducing power according to the type of the optical recording medium (not shown) All of the syscon microcomputer 6 for causing the unit 2 and the system IC 8 for modulating and controlling the laser light to execute the program, and the optical recording medium (not shown) A servo system microcomputer 5 having a rewritable program execution area storing initial data and programs corresponding to the type, and a storage unit 5A for storing a received light signal output from the system IC 8, and a program executed by the servo system microcomputer 5 And a second drive unit 9 that operates a spindle motor, a focus actuator, a tracking actuator, and the like, and performs recording and reproduction according to a program corresponding to the optical recording medium.
FIG. 13 is a diagram showing a program including a DVD-ROM, a CD, a DVD-RAM, a DVD-R, and a DVD-RW executed by a conventional servo microcomputer, which is executed by the servo microcomputer 5. is there.

However, despite the fact that the optical recording medium (not shown) to be recorded / reproduced is one type, the servo-system microcomputer 5 stores programs corresponding to all types of optical recording media stored in the non-rewritable program execution area 5C. The program corresponding to the one type of optical recording medium is branched from the program in the order of processes, and recording / reproduction is performed.
However, if it is made compatible with various types of optical recording media, the number of processes for branching the program increases, so the processing time of one loop of servo control becomes longer, and high-speed and high-precision recording / reproduction can be performed. There wasn't.

  If the rewritable program execution area 5C of the servo microcomputer 5 is rewritable, the syscon microcomputer 6 rewrites the program execution area 5C of the servo microcomputer 5 with a program corresponding to the type of optical recording medium, and the servo microcomputer The processing time of one loop of servo control 5 for executing the program is shortened, and high-speed and high-accuracy servo can be performed. At this time, if it is determined that the program being executed is different from the optical recording medium to be recorded / reproduced, the program execution of the servo microcomputer 5 is temporarily stopped and the program execution area is recorded / reproduced. Thus, there is a problem that it is necessary to rewrite the program of the optical recording medium and restart the servo system microcomputer 5, and the startup processing time until the start of recording / reproduction becomes long, and quick recording / reproduction cannot be performed.

  Therefore, the present invention provides a recording / reproducing apparatus for an optical recording medium that can execute a program corresponding to the type of the optical recording medium to perform high-speed and high-accuracy servo and perform quick recording / reproduction. The purpose is to do.

  The present invention irradiates an optical recording medium with laser light, discriminates the type of the optical recording medium from a light reception signal obtained from the reflected light of the optical recording medium, and uses a program suitable for the optical recording medium. In a recording / reproducing apparatus for an optical recording medium for recording / reproducing, a storage means for dividing and storing initial data corresponding to the type of the optical recording medium and all programs, and light reception obtained from reflected light of the optical recording medium A storage unit for storing signals and a rewritable program execution area, and servo control means for executing the first program of the optical recording medium, and the type of the optical recording medium corresponding to the light reception signal can be discriminated A discriminant table, comparing the received light signal stored in the storage unit of the servo system control means with the discriminant table, and the optical recording in which the received light signal is recorded in the discriminant table; It is determined whether or not it corresponds to the type of medium, and only when the medium does not correspond to the optical recording medium, other than the program common to the type of optical recording medium included in the first program, and A second program corresponding to the optical recording medium determined from the received light signal is output to a rewritable program execution area of the servo system control means, and the second program is incorporated into the first program. And a syscon system control means to be executed by the servo system control means as a program of No. 3. An optical recording medium recording / reproducing apparatus is provided.

  As described above, according to the recording / reproducing apparatus of the optical recording medium of the present invention, the storage unit that stores the initial data corresponding to the type of the optical recording medium and all programs divided into a plurality of pieces, and the reflection of the optical recording medium Servo control means for executing a first program of the optical recording medium having a storage unit for storing a light reception signal obtained from light and a rewritable program execution area, and the optical recording medium corresponding to the light reception signal A discrimination table that can discriminate the type of the servo system, comparing the light reception signal stored in the storage unit of the servo system control means with the discrimination table, and the light reception signal recorded in the discrimination table A program common to the type of the optical recording medium included in the first program is determined only when the type is not compatible with the optical recording medium. And a second program corresponding to the optical recording medium determined from the received light signal is output to a rewritable program execution area of the servo system control means, and the second program is output to the first program. Since it comprises the syscon system control means to be executed by the servo system control means as a third program incorporating the program, high-speed and high-accuracy servo can be performed, and quick recording and reproduction can be performed.

Embodiments of an optical recording medium recording / reproducing apparatus of the present invention will be described with reference to FIGS.
The same reference numerals are given to the same configuration in the conventional example, and the description thereof is omitted.
FIG. 1 is a schematic diagram of an optical recording medium recording / reproducing apparatus according to an embodiment of the present invention.
In the following, the first program is a DVD-ROM program, and the second program is a CD program. It is assumed that the third program is a program for CD other than the program common to the CD for the first program.

  As shown in FIG. 1, an optical recording medium recording / reproducing apparatus 1 according to an embodiment of the present invention includes a rewritable program execution area 5B in a servo system microcomputer 5 in a conventional optical recording medium recording / reproducing apparatus. The flash memory 4 for storing programs other than those common to the type of medium is added to the syscon microcomputer, and the rest is the same.

  That is, the optical recording medium recording / reproducing apparatus 1 of the present invention irradiates the optical recording medium with laser light, determines the type of the optical recording medium based on a light reception signal obtained from the reflected light of the optical recording medium, When performing recording / reproduction using a program suitable for the optical recording medium, the flash memory 4 storing a plurality of initial data and all the programs corresponding to the type of the optical recording medium (not shown), and the first program The first program includes a storage unit 5A for driving the first drive unit 2 and storing a received light signal obtained from reflected light of the optical recording medium (not shown) and a rewritable program execution area 5B. And the servo system microcomputer 5 that controls the spindle motor, the focus actuator, etc., and the type of the optical recording medium (not shown) is determined corresponding to the received light signal. A determination table 6A, which compares the light reception signal stored in the storage unit 5A of the servo microcomputer 5 with the determination table 6A, and the light (not shown) in which the light reception signal is recorded in the determination table 6A. It is determined whether or not the recording medium is compatible with the recording medium. Only when the recording medium is not compatible with the optical recording medium (not shown), the program other than the program common to the optical recording medium (not shown) included in the first program is included. The second program for the optical recording medium corresponding to the received light signal is output to the rewritable program execution area 5B of the servo microcomputer 5, and the second program is incorporated into the first program. And a syscon microcomputer 6 to be executed by the servo microcomputer 5 as a program.

  Further, an optical pickup 7 having a semiconductor laser 3 and having a light receiving portion (not shown) that receives the reflected light reflected by irradiating the optical recording medium (not shown) with the laser light emitted from the semiconductor laser 3; A servo signal obtained by adjusting the light receiving signal photoelectrically converted by the light receiving unit (not shown) is output to the servo system microcomputer 5, the light reception signal is adjusted in the same manner, and the reproduction signal is binarized. The system IC 8 is controlled to be modulated / demodulated, and the second drive unit 9 drives a spindle motor, a focus actuator, and the like according to a program executed by the servo microcomputer 5. The syscon microcomputer 6 receives and outputs images and audio signals from the back-end system unit.

  According to the present invention, the initial data corresponding to the type of the optical recording medium (not shown) and the flash memory 4 in which all the programs are divided and stored, and the first driving unit 2 by the execution of the first program. A servo system microcomputer 5 that has a storage unit 5A for storing the received light signal obtained from the reflected light of the optical recording medium (not shown) and a rewritable program execution area 5B, and that executes the first program; A discrimination table 6A for discriminating the type of the optical recording medium (not shown) corresponding to the received light signal is provided, and the received light signal stored in the storage unit 5A of the servo microcomputer 5 is compared with the discrimination table 6A. Then, it is determined whether or not the light reception signal corresponds to the optical recording medium (not shown) recorded in the discrimination table 6A, and corresponds to the optical recording medium (not shown). The servo-system microcomputer 5 can rewrite the second program for the optical recording medium corresponding to the received light signal other than the program common to the type of the optical recording medium (not shown) included in the first program. And a syscon microcomputer 6 that outputs to the program execution area 5B and causes the servo microcomputer 5 to execute the third program as the third program in which the second program is incorporated into the first program. Servo can be performed, and quick recording and reproduction can be performed.

This will be specifically described below.
A case where the type of optical recording medium is CD and the program being executed is DVD-ROM will be described.
FIG. 2 is a diagram showing a program that replaces a program other than the DVD-ROM program when the optical recording medium is a CD.
FIG. 2 compares with FIG. The program 1 common to the two drawings is an area for executing the common program regardless of the type of the optical recording medium. A program 3-1, a program 4-1, and a program 5-1, which are common to the two diagrams, are areas for executing one type of program on the optical recording medium. In the case of FIG. 2, the program execution area is rewritable to one type of program on the optical recording medium. The program 2 in FIG. 13 is a branch processing program and does not have this area in FIG. The programs 3-2 to 5-2, the programs 3-3 to 5-3, and the programs 3-4 to 5-4 in FIG. 13 are areas for executing one type of program among the respective types of optical recording media. . As shown in FIG. 2, only the program corresponding to the type of the optical recording medium can be arranged.

FIG. 3 is a diagram showing a main flowchart of the servo system microcomputer 5.
First, as shown in FIG. 3, the boot download processing unit downloads the DVD-ROM program of the basic optical recording medium of the flash memory 4 from the syscon microcomputer 6 as shown in the program map of FIG. Next, the entire initial data is subjected to the entire initialization process from the flash memory 4 via the system microcomputer 6 in the same manner as the program.

Next, when the optical recording medium is determined, each program of the tracking control process, the thread control process, and the tilt control process is replaced using a download process.
During the replacement, the replacement program does not operate, so the processing must be skipped. Therefore, according to each program replacement, before executing the download process, the replacement 1, the replacement 2, and the replacement 3 set by the syscon microcomputer are determined so that the program being replaced is not processed.

FIG. 4 is a diagram illustrating a main flowchart of the syscon microcomputer 6 according to the embodiment.
First, the DVD-ROM program download process of the basic optical recording medium is performed for discriminating the type of optical recording medium in the boot download process and overall initialization process of the servo microcomputer 5 shown in FIG. Next, an optical recording medium type discrimination process is performed. Next, an activation process for each optical recording medium that downloads and activates a program corresponding to the type of optical recording medium described above is performed. Details of each process are shown in FIGS. 5, 6, and 7.

FIG. 5 is a diagram illustrating a download flowchart of the optical recording medium type discrimination program in the syscon microcomputer 6 according to the embodiment.
First, the servo microcomputer 5 is reset.
Next, the boot download process is performed for the program 1, the program 3-1, the program 4-1, and the program 5-1, and the startup process 1 is performed. The startup process 1 is a process of moving the program operation area of the servo microcomputer 5 from the boot area to the program area. Next, the entire initial data, initial data 3-1 necessary for each program unit, initial data 4-1, and initial data 5-1, are downloaded, and start-up process 2 is performed. The startup process 2 is a servo loop execution start process from the data initialization wait state of the servo microcomputer 5.

FIG. 6 is a flowchart of the optical recording medium type determination activation process in the syscon microcomputer 6 according to the embodiment.
In the optical recording medium type discriminating start process, the optical recording medium type discriminating process and starting up to focus ON are performed. Optical recording medium type determination processing end confirmation processing, optical recording medium type determination information acquisition confirmation processing, optical recording medium type determination program processing command issue processing, optical recording medium type determination information acquisition processing, optical recording medium type determination processing Consists of.

  In the optical recording medium type discriminating process completion confirmation process, the optical recording medium type discriminating start process is terminated when the optical recording medium type discriminating process is finished, and the optical recording medium type discriminating process is finished when the optical recording medium type discriminating process is not finished. Move to the information acquisition confirmation process.

  In the optical recording medium type identification information acquisition confirmation process, if the optical recording medium type identification information has not been acquired, the optical recording medium type identification program processing command issuance and the optical recording medium type are performed in order to obtain the optical recording medium type identification information. The determination information acquisition is executed, and when the optical recording medium type determination information has been acquired, the optical recording medium type determination processing is executed from the optical recording medium type determination information.

  The optical recording medium type identification information obtained by issuing the optical recording medium type identification program processing command and acquiring the optical recording medium type identification information includes arrival times up to a predetermined number of revolutions that vary depending on the optical recording medium size. The amplitude value of the signal (focusing error (FE) signal and sum (AS) signal) that varies depending on the reflectance of the light of the signal (tracking error (TE) signal) varies depending on the groove depth, pit presence, etc. for each optical recording medium type There are generation periods of different signals ((CAPA) signals) depending on the address recording method of the amplitude value optical recording medium, which differs depending on the unrecorded / recorded amplitude value optical recording medium.

  When obtaining an arrival time up to a predetermined number of revolutions depending on the size of the optical recording medium, issuing a program processing command for discriminating the type of the optical recording medium in the process of rotating the optical recording medium and measuring the arrival time up to the predetermined number of revolutions depending on the size of the optical recording medium Information for discriminating the type of optical recording medium is acquired by the processing.

  In addition, when obtaining different signals depending on the light reflectance for each type of optical recording medium, a process for rotating the optical recording medium and a process for switching the type of light (wavelength) that differs for each optical recording medium are provided for each type of light. The signal detection circuit switching process varies depending on the light reflectance, the laser control process for irradiating the optical recording medium with light, and the focal point focused by the objective lens is moved near the recording surface of the optical recording medium. An optical recording medium type discriminating program processing command for processing to approach or move away from the recording surface is issued, and optical recording medium type discriminating information is acquired by signal detection processing that differs depending on the light reflectance for each optical recording medium type.

  When obtaining different signals depending on the groove depth for each optical recording medium type, presence or absence of pits, different signals depending on whether the optical recording medium is unrecorded / recorded, and different signals depending on the address recording method of the optical recording medium, the optical recording medium type In addition to processing to obtain different signals depending on the reflectance of each light, focusing error signal gain adjustment processing, focusing control pull-in processing, and focusing control processing are performed, depending on the groove depth and pit presence for each type of optical recording medium Different signal (tracking error (TE) signal) detection circuit switching process and unrecorded / recorded optical recording medium, different signal (disk (RF) signal) detection circuit switching process and optical recording medium address recording method Program processing command for discriminating optical recording medium type for signal ((CAPA) signal) detection circuit switching processing and optical recording medium rotation speed switching processing Issuing and optical recording by different signal detection process depending on the groove depth for each type of optical recording medium, different signal detection process depending on unrecorded / recorded optical recording medium, and different signal detection process depending on the address recording method of optical recording medium Acquire information for determining the medium type.

  Optical recording medium type determination process Arrival time comparison determination process up to a predetermined number of rotations that varies depending on the optical recording medium size, signals that differ depending on the light reflectance for each optical recording medium type (focusing error (FE) signal and sum (AS)) Signal) Comparison / discrimination processing Different signals depending on the groove depth, presence / absence of pits, etc. for each optical recording medium (tracking error (TE) signal) Comparison / discrimination processing Different signals (disc (RF) signal) depending on whether the optical recording medium is unrecorded or recorded ) Comparison determination process The type and size of the optical recording medium are determined by a signal ((CAPA) signal) comparison determination process that differs depending on the address recording method of the optical recording medium.

  When the type and size of the optical recording medium are determined, the rotation speed setting of the optical recording medium is switched in accordance with the type and size of the optical recording medium, the optical recording medium type determination process ends, and the optical recording medium type determination process ends confirmation The process ends with the process.

FIG. 7 is a flowchart of the activation process for each optical recording medium in the syscon microcomputer 6 according to the embodiment.
By the optical recording medium type determination process, the optical recording medium type determination is performed, and the focus is on. In the start processing for each optical recording medium type, the processing branches to processing corresponding to each optical recording medium type according to determination 1, determination 2, and determination 3 according to the optical recording medium type. For example, if the DVD-R is determined in the optical recording medium type determination process, the program shifts to a DVD-R program download process. In DVD-R program download processing, tracking control processing, thread control processing, and tilt control processing are downloaded. In the tracking control process download process, the replacement 1 is set, the replacement program 3-4 is downloaded, the initial data 3-4 is downloaded, the replacement 1 is cleared, and the process proceeds to the thread control process download process. In the thread control process download process, the replacement 2 is set, the replacement program 4-4 is downloaded, the initial data 4-4 is downloaded, the replacement 2 is cleared, and the process proceeds to the tilt control process download process.

  In the tilt control process download process, the replacement 3 is set, the replacement program 5-4 is downloaded, the initial data 5-4 is downloaded, the replacement 3 is cleared, and the process proceeds to the activation process. Various signal detection circuit switching processes for DVD-R, tracking gain adjustment process, tracking offset adjustment process, tracking pull-in process, tracking control process thread control process, still control process, tilt control process, etc. The flag is set at the end of activation, the completion of the optical recording medium activation process is detected, and the activation process for each optical recording medium is terminated.

  FIG. 8 and FIG. 9 show an embodiment of a download processing flowchart for replacing the determined program in the rewritable program area 5B of the servo microcomputer 5 after the optical recording medium type is determined. FIG. 8 shows a flowchart of the download process of FIG. 3 by the syscon microcomputer 6 and FIG. 9 shows the servo microcomputer 5. In terms of data transmission / reception, the syscon microcomputer 6 in FIG. 8 transmits and the servo microcomputer 5 in FIG. 9 receives.

  First, FIG. 8 on the transmission side will be described step by step. In the download process of the syscon microcomputer 6, the download permission flag is cleared, the download checksum is cleared, the download is initialized, the download start address is set, and the download permission is set. Thereafter, if the download preparation completion ACK is clear, the monitoring is continued. If the download preparation completion ACK is set, the download preparation of the servo microcomputer 5 is completed and the process proceeds to the download data number confirmation process.

  In the download data number confirmation process, the number of downloads is monitored, and if the number of download data is not completed, the process proceeds to the download permission confirmation process. In the download permission confirmation process, the write permission flag is monitored. If the write permission flag is set, monitoring is continued. If the write permission flag is clear, the process proceeds to download data writing processing. In the download writing process, download data is set. This sets download write permission.

  Then, the checksum of the download data is calculated, the process proceeds to the download number confirmation process, and the download writing process is executed while the number of download data is not completed. When the download data number confirmation process is completed, the download permission is cleared and the process proceeds to the download confirmation preparation process. In the download confirmation preparation process, the download preparation end ACK is monitored. If the download preparation end ACK is set, the monitoring is continued. If the download preparation end ACK is clear, the process proceeds to the download confirmation process. In the download process confirmation process, the checksum of the servo microcomputer 5 is read and compared with the checksum of the syscon microcomputer 6. If the checksums match, the download process ends normally.

  Next, FIG. 9 on the receiving side will be described step by step. If the download process has not been initialized, the initialization process is performed. If download permission is set from the transmission side, it is confirmed which replacement destination download is specified, replacement 1, replacement 2, and replacement 3. If a replacement destination is set, initialization processing is performed. In the initialization process, the download data checksum is cleared, the download start address set from the transmission side is read, and the initialization ends. The reception side returns an ACK to the transmission side indicating that it is ready for download, and sets the end of download initialization.

  Next, initialization is completed, and if download permission is permitted and writing permission is permitted from the transmission side, if the replacement destination is confirmed and set, the process proceeds to download execution processing. Write the download data to the download destination address, clear the write permission, set the next download destination address, and calculate the download data checksum. On the transmission side, new download data is transmitted and the write permission is set so that the download data is repeatedly written sequentially.

When the transmission is completed, the transmission side clears the download permission. Therefore, the reception side shifts to a check operation to confirm whether the download process has been successfully performed. In the confirmation work, the download data checksum calculated on the receiving side is set, the end of initialization is cleared in preparation for the next download process, and a download preparation end ACK is returned.
At the receiving side, all the download processing ends here.

  Next, the transmission side confirms the download preparation end ACK, confirms the download data checksum calculated by the reception side, and determines that the download process is completed if it matches the transmission side. For example, if the download checksums do not match, the transmission side tries to download again.

  FIG. 10 and FIG. 11 show, as other embodiments, a flowchart and a servo process for starting each optical recording medium of the syscon microcomputer 6 showing the program contents in which Blu-ray (BD: high density recording DVD) is added as an optical recording medium. 3 is a diagram showing a main flowchart of a system microcomputer 5. FIG.

  Since Blu-Ray (BD) as an optical recording medium has different focus control compared to others, the focus control program is also replaced. In the previous embodiment, the focus control and the spindle control were replaced with each other. In this example, the focus control is switched up to the spindle control.

1 is a schematic diagram of a recording / reproducing apparatus for an optical recording medium in an embodiment of the present invention. It is a figure which shows the program which replaces other than the program common to the program of DVD-ROM when it assumes that an optical recording medium is CD. It is a figure which shows the main flowchart of a servo system microcomputer. It is a figure which shows the main flowchart of the syscon type | system | group microcomputer of an Example. It is a figure which shows the download flowchart of the program for optical recording medium kind discrimination | determination in the syscon type | system | group microcomputer of an Example. It is a figure which shows the flowchart of an optical recording medium kind discrimination | determination starting process in the syscon type | system | group microcomputer of an Example. It is a figure which shows the flowchart of a starting process for every optical recording medium in the syscon type | system | group microcomputer of an Example. It is a figure which shows the flowchart of the download process of FIG. 3 of a system microcomputer. It is a figure which shows the flowchart of the download process of FIG. 3 of a servo system microcomputer. It is a figure which shows the starting process flowchart for every optical recording medium of the syscon type | system | group microcomputer which showed the program content which added Blu-ray as an optical recording medium. It is a figure which shows the main flowchart of the servo-system microcomputer which showed the program content which added Blu-ray as an optical recording medium. It is the schematic which shows the recording / reproducing apparatus of the conventional optical recording medium. It is a figure which shows the program containing DVD-ROM, CD, DVD-RAM, DVD-R, and DVD-RW which the conventional servo system microcomputer performed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Recording / reproducing apparatus, 2 ... 1st drive part, 3 ... Semiconductor laser, 4 ... Flash memory, 5 ... Servo system microcomputer, 5A ... Memory | storage part, 5B ... Rewritable program execution area, 5C ... Non-rewritable program execution Area, 6 ... syscon microcomputer, 6A ... discrimination table, 7 ... optical pickup, 8 ... system IC, 9 ... second drive unit

Claims (1)

Laser light is irradiated onto the optical recording medium, the type of the optical recording medium is determined based on the received light signal obtained from the reflected light of the optical recording medium, and recording / reproduction is performed using a program suitable for the optical recording medium In an optical recording medium recording / reproducing apparatus,
Storage means for storing initial data corresponding to the type of the optical recording medium and all programs divided into a plurality of parts,
Servo control means for storing a light receiving signal obtained from the reflected light of the optical recording medium and a rewritable program execution area, and executing the first program of the optical recording medium;
It has a discrimination table that can discriminate the type of the optical recording medium corresponding to the light reception signal, compares the light reception signal stored in the storage unit of the servo system control means with the discrimination table, and receives the light reception It is determined whether or not a signal corresponds to the type of the optical recording medium recorded in the discrimination table, and the light included in the first program is only when the signal does not correspond to the optical recording medium. A second program corresponding to the optical recording medium determined from the received light signal, other than a program common to the type of recording medium, is output to a rewritable program execution area of the servo system control means, and the first Syscon system control means for causing the servo system control means to execute as a third program in which the second program is incorporated into one program;
An optical recording medium recording / reproducing apparatus comprising:

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