JP2010231871A - Optical disk reproducing device, optical disk reproducing system, reproducing method at startup of the optical disk reproducing device, and reproducing program at startup of optical disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an erroneous operation even when optical disks are exchanged during startup while reproduction of the optical disk is interrupted. <P>SOLUTION: By storing determination information of the optical disk 5 along with a reproduction interrupted position when reproduction is interrupted, acquiring new identification information from the optical disk 5 when re-startup after reproduction interruption is completed to create post-interruption determination information, comparing the post-interruption determination information with the determination information to determine whether or not the optical disk 5 is the same before and after the startup, and performing reproduction from the reproduction interrupted position when it is determined that the optical disk 5 is the same before and after the startup, it is possible to recognize exchange of the optical disk by an optical disk reproducing device 10 independently even when startup of an optical disk reading device 20 is completed and the optical disk is exchanged before startup of the optical disk reproducing device 10 is completed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical disc playback apparatus having an optical disc last address playback function, an optical disc playback system, an optical disc playback apparatus playback method, an optical disc startup playback program, and the like.

  Conventional apparatuses for reproducing optical disks such as CD (Compact Disk), DVD (Digital Video Disk or Digital Versatile Disk), and BD (Blu-ray Disc) have a last address reproduction function disclosed in Patent Document 1 and the like. . The last address playback function stores the playback interrupt position in the memory when the main power is turned off, etc., and then reads the stored last address from the memory and restarts playback from the playback interrupt position before restarting playback. Had resumed.

Japanese Patent Laid-Open No. 4-313876

  The optical disc playback apparatus has a drive that reads information from the optical disc and a decoder that analyzes and plays back the information read by the drive. The drive stores physical information and servo adjustment values of the optical disc, and at the next startup, the stored information and values are used to speed up the setup of the optical disc at startup.

  However, in recent years, the decoding process tends to be complicated due to the progress of compression techniques and the like, and the decoder processing is rapidly increasing. Therefore, the decoder is often equipped with an OS equivalent to an operating system (OS) installed in a personal computer (PC). As a result, the start-up time from when the decoder is turned on until it becomes operable tends to be delayed as with the PC.

  Then, when the decoder and the drive are activated simultaneously, the activation of the drive is completed first, and then the activation of the decoder is completed after a while. In such a case, when the activation of the drive is completed before the decoder is activated at the next activation of the optical disk reproducing apparatus storing the last address described above, the drive is activated during the activation of the decoder even though the decoder is activated. This optical disk can be replaced with another optical disk. However, since the decoder that has been activated cannot detect that the optical disk corresponding to the last address reproduction has been exchanged, there has been a problem that the last address reproduction is performed on another optical disk.

  It is also conceivable to store the fact that the optical disk has been replaced in the drive and notify the decoder that the optical disk has been replaced when the activation of the decoder is completed. Changes must be made, leading to increased costs. Therefore, it is desired that the last address reproduction can be accurately performed only by adding a decoder function. As described above, the problem to be solved by the present invention is exemplified by the above-described problem.

  Therefore, in view of the above-described problems, the present invention can prevent malfunction even when an optical disk is replaced during startup in an optical disk playback interrupted state, at the time of startup of the optical disk playback apparatus, optical disk playback system, and optical disk playback apparatus It is an object to provide a reproduction method, a reproduction program at the time of starting an optical disk, and the like.

  In order to solve the above-mentioned problems, an optical disk reproducing apparatus according to claim 1 made according to the present invention stores reproduction means for reproducing information read from an optical disk by an optical disk reader, and a reproduction interruption position of the reproduction means at the time of reproduction interruption. And a reproduction interruption position storage means for performing identification information for identifying the optical disk reproduced by the reproduction means in an optical disk reproduction apparatus that completes activation later than completion of activation of the optical disk reader. Discrimination information acquiring means for acquiring from the information read by the optical disc reader, and discriminating information for creating discriminating information indicating the optical disc at the time of the reproduction interruption based on the identification information acquired by the identification information acquiring means Creating means; discrimination information storing means for storing discrimination information created by the discrimination information creating means; and Based on the identification information acquired by the post-interruption identification information acquisition unit and the post-interruption identification information acquisition unit that acquires the identification information from the information read by the optical disc reader when the activation is completed again The post-interruption discrimination information creating means for creating post-interruption discrimination information and the discrimination information stored in the discrimination information storage means and the post-interruption discrimination information are compared, and the optical disc before and after startup is the same Determining means for determining whether or not the reproduction means is the same by the determination means, the information from the reproduction interruption position stored in the reproduction interruption position storage means , And when it is determined by the determination means that they are not the same, it is a means for reproducing from the beginning of the optical disc.

  The optical disk reproducing system according to claim 4, which is made according to the present invention to solve the above-mentioned problems, is the optical disk reproducing apparatus according to any one of claims 1 to 3, and information read from the optical disk is the optical disk reproducing apparatus. And an optical disk reading device that outputs to the optical disc.

  In order to solve the above-mentioned problem, the start-up playback method for an optical disc playback apparatus according to claim 6 according to the present invention comprises: playback means for playing back information read from an optical disk by an optical disc reader; A reproduction interruption position storage means for storing a reproduction interruption position, and in the reproduction method at the time of start-up of the optical disk reproduction apparatus that completes activation later than completion of activation of the optical disk reader, the reproduction means reproduces the reproduction A process of acquiring identification information for identifying an optical disk from information read by the optical disk reader, and discriminating information indicating the optical disk when the reproduction is interrupted are created based on the acquired identification information. The process, the process of storing the created discrimination information in the discrimination information storage means, and the start-up after the reproduction interruption is completed A process of acquiring the identification information from information read by the optical disc reader, a process of creating post-interruption determination information based on the acquired identification information, and the determination information storage means Comparing the discriminating information and post-interruption discriminating information to determine whether or not the optical disc before and after activation is the same, and when it is determined that the optical disc is the same, The reproduction means reproduces information from the beginning of the optical disc when it is determined that the process of reproducing information from the reproduction interruption position stored in the reproduction interruption position storage means and the optical disc are not the same. And a process of performing.

  In order to solve the above-mentioned problem, an optical disk start-up reproduction program according to claim 7 made according to the present invention comprises: reproduction means for reproducing information read from an optical disk by an optical disk reader; and reproduction interruption position of the reproduction means when reproduction is interrupted And a reproduction interruption position storage means for storing the optical disc reproducing apparatus that completes the activation later than the completion of the activation of the optical disk reader, and for identifying the optical disk reproduced by the reproduction means. Based on the identification information acquired by the identification information acquisition means, identification information acquisition means for acquiring identification information from the information read by the optical disk reader, and discrimination information indicating the optical disk at the time of the reproduction interruption. Discrimination information creation means to be created and discrimination information created by the discrimination information creation means are stored in the discrimination information storage means Means for acquiring the identification information from the information read by the optical disc reader when the reactivation after the interruption is completed, and acquiring the identification information after the interruption. The post-interruption discrimination information creating means for creating post-interruption discrimination information based on the identification information acquired by the means, and the discrimination information stored in the discrimination information storage means and the post-interruption discrimination information are compared, When the determining means for determining whether or not the optical discs before and after the start are the same and the reproducing means are determined to be the same by the determining means, the reproduction interrupted position storage means stores the reproduction. When the information is reproduced from the interruption position and is determined not to be the same by the determination means, an optical disc for functioning as a means for reproducing from the beginning of the optical disk is used. It has become a click when starting playback program.

1 is a configuration diagram showing a basic configuration of an optical disc playback apparatus and an optical disc playback system according to the present invention. It is a block diagram which shows schematic structure of the audio system to which this invention is applied. FIG. 3 is a configuration diagram illustrating an example of a schematic configuration of a drive illustrated in FIG. 2. It is a figure which shows an example of the software structure of a decoder and a drive. It is a figure for demonstrating an example of identification information and discrimination | determination information. 3 is a flowchart showing an example of a reproduction control process executed by the microcomputer shown in FIG.

  An embodiment of an optical disc playback apparatus, optical disc playback system, optical disc playback apparatus playback method, and optical disc startup playback program according to the present invention will be described below with reference to the basic configuration diagram of FIG.

  In FIG. 1, according to the optical disk reproducing apparatus 10, reproduction means P1 for reproducing information read from the optical disk 5 by the optical disk reading apparatus 20, and reproduction interruption position storage for storing the reproduction interruption position of the reproduction means P1 at the time of reproduction interruption. Identification information for identifying the optical disc 5 reproduced by the reproduction means P1 in the optical disc reproduction apparatus 10 that completes activation later than completion of activation of the optical disc 5 reader 20. Based on the identification information acquired by the identification information acquisition means P2, the identification information acquisition means P2 acquired from the information read by the optical disk reading device 20 and the discrimination information indicating the optical disk 5 at the time of the reproduction interruption are obtained. Discriminating information creating means P3 to be created and discriminating information for storing the discriminating information created by the discriminating information creating means P3 A storage means D2, an after-interruption identification information acquisition means P4 for acquiring the identification information from the information read by the optical disc reading device 20 when the restart after the interruption is completed, and after the interruption The post-interruption discrimination information creating means P5 for creating post-interruption discrimination information based on the identification information acquired by the identification information acquisition means P4, the discrimination information stored in the discrimination information storage means D2 and the post-interruption discrimination information And determining means P6 for determining whether or not the optical discs 5 before and after activation are the same, and when the reproducing means P1 is determined to be the same by the determining means P6 Reproduces the information from the reproduction interruption position stored in the reproduction interruption position storage means D1, and when the determination means P6 determines that the information is not the same, It is a means to reproduce from the beginning of the queue 5.

  The optical disk reproduction apparatus 10 is activated at the time of start-up by reproducing means P1 for reproducing information read from the optical disk 5 by the optical disk reading apparatus 20, and reproduction interruption position for storing the reproduction interruption position of the reproduction means P1 when reproduction is interrupted. The optical disk 5 reproduced by the reproduction means P1 in the reproduction method at the time of activation of the optical disk reproduction apparatus 10 that completes activation later than the completion of activation of the optical disk reader 20; A process of acquiring identification information for reading from the information read by the optical disk reader 20, and a process of generating discrimination information indicating the optical disk 5 at the time of the reproduction interruption based on the acquired identification information; The process of storing the created discrimination information in the discrimination information storage means D2 and the start-up after the reproduction interruption are completed. The process of acquiring the identification information from the information read by the optical disc reader 20, the process of creating post-interruption determination information based on the acquired identification information, and the determination information storage means D2 When the discriminating information stored and the discriminating information after interruption are compared to determine whether or not the optical disc 5 before and after activation is the same, and when it is determined that the optical disc 5 is the same In addition, when it is determined that the reproduction means P1 reproduces information from the reproduction interruption position stored in the reproduction interruption position storage means D1 and the optical disk 5 is not the same, from the beginning of the optical disk 5 The reproducing means P1 reproduces information.

  Further, the optical disc activation reproduction program reproduces information read by the optical disc reader 20 from the optical disc 5, and reproduction interruption position storage means D1 for storing the reproduction interruption position of the reproduction means P1 when reproduction is interrupted. And the identification information for identifying the optical disk 5 reproduced by the reproducing means P1 is used to identify the computer of the optical disk reproducing apparatus 10 that completes activation later than the activation of the optical disk reading apparatus 20 is completed. Based on the identification information acquired by the identification information acquisition unit P2, identification information acquisition unit P2 acquired from the information read by the optical disc reader 20 and discrimination information indicating the optical disc 5 at the time of the interruption of reproduction are created. Discriminating information creating means P3 for performing discriminating information created by the discriminating information creating means P3 2 and a post-interruption identification information acquisition unit P4 for acquiring the identification information from the information read by the optical disc reader 20 when the start-up after the reproduction interruption is completed. The post-interruption discrimination information creating means P5 for creating post-interruption discrimination information based on the identification information acquired by the post-interruption identification information acquisition means P4, the discrimination information stored in the discrimination information storage means D2 and the post-interruption When the determination means P6 that determines whether or not the optical disc 5 before and after startup is the same is compared with the determination information and the reproduction means P1 is determined to be the same by the determination means P6, The information is reproduced from the reproduction interruption position stored in the reproduction interruption position storage means D1, and when it is determined by the determination means P6 that they are not the same, the optical disk is reproduced. It has a disc starts playback program for functioning as means for reproducing from the beginning of the 5.

  According to such an optical disk reproducing apparatus 10, information read from the optical disk 5 by the optical disk reading apparatus 20 is reproduced by the reproducing means P1, and the identification information for identifying the reproduced optical disk 5 is the optical disk reading apparatus 20. It is acquired by the identification information acquisition means P2 from the information read by. When the reproduction is interrupted, the reproduction interruption position is stored in the reproduction interruption position storage means D1, and the discrimination information indicating the optical disc 5 at the time of reproduction interruption is based on the identification information by the discrimination information creating means P3. After being created and stored in the discriminant information storage means D2, the optical disc playback apparatus 10 is in a power-off state, a standby state, etc. Thereafter, when the optical disc playback device 10 and the optical disc reading device 20 are started by turning on the power or the like, the startup of the optical disc playback device 10 is completed after the startup of the optical disc reading device 20 is completed. Then, when the identification information is acquired by the post-interruption identification information acquisition unit P4 from the information read by the optical disc reader 20 after the start-up is completed, the optical disc playback apparatus 10 determines after the interruption based on the identification information. Information is created by the post-interruption discrimination information creation means P5. Then, the determination means P6 compares the post-interruption determination information with the determination information stored in the determination information storage means D2, and determines whether or not the optical disk 5 before and after activation is the same. When the determination means P6 determines that they are the same, the information on the optical disc 5 is reproduced by the reproduction means P1 from the reproduction interruption position stored in the reproduction interruption position storage means D1. On the other hand, when it is determined by the determination means P6 that they are not identical, the optical disk 5 exchanged during startup is reproduced from the beginning by the reproduction means P1.

  Therefore, the discriminating information of the optical disc 5 is stored together with the reproduction interruption position when the reproduction is interrupted, and after the interruption is completed, new identification information is obtained from the optical disc 5 to create post-interruption discrimination information. Since the discriminating information is compared with the discriminating information to determine whether or not the optical discs 5 before and after activation are the same, the disc is reproduced from the reproduction interruption position only when the discs are discriminated. Even if the optical disk reader 20 is completely started and the optical disk 5 is replaced before the activation is completed, the optical disk reproducing apparatus 10 can recognize the replacement independently, and thus prevents the optical disk reproducing apparatus 10 from malfunctioning. can do. Further, since the optical disk reading device 20 does not need to detect the replacement of the optical disk 5, it can be easily dealt with by adding a function only to the optical disk reproducing device 10, so that the existing optical disk reading device 20 is used as it is. Can do. Therefore, since the optical disk 5 can be exchanged even while the optical disk playback apparatus 10 is activated, the optical disk playback apparatus 10 can be enhanced in functionality, and the user's operation restrictions can be relaxed, contributing to the improvement of convenience. . In particular, it is suitable as an optical disc playback apparatus 10 for an optical disc such as a Blu-ray disc having a large system configuration.

  Further, in the optical disc reproducing apparatus 10 described above, the discrimination information creation means P3 and the post-interruption discrimination information creation means P5 convert the identification information into a fixed-length character string or pseudo-random number to convert the discrimination information and the post-interruption It is a means for generating discrimination information.

  According to the optical disc reproducing apparatus 10 as described above, the identification information is converted into a fixed-length character string or a pseudo-random number, and the discrimination information and the post-interruption discrimination information are created. Therefore, the data size of the identification information is increased. However, since the data size of the discrimination information created based on the identification information and the post-interruption discrimination information can be reduced, the uniqueness of the identification information can be improved. In addition, since the possibility that the different discrimination information and the post-interruption discrimination information coincide by chance can be reduced, the discrimination accuracy of the optical disc 5 before and after startup can be improved. Furthermore, since the data amount of the discrimination information and post-interruption discrimination information can be reduced, it is possible to prevent an increase in the capacity of the recording medium used as the discrimination information storage means D2.

  Further, in the above-described optical disc playback apparatus 10, the identification information includes the unique data and actual data of the optical disc 5.

  According to such an optical disk reproducing apparatus 10, since the identification information includes the unique data and the actual data of the optical disk 5, the unique data of the optical disk 5 is not defined by the standard. Although there is a possibility that they match, the uniqueness of the identification information can be ensured by adding the actual data to the unique data. Therefore, the discrimination accuracy of discrimination information created based on the identification information and post-interruption discrimination information can be further improved.

  Next, the optical disc reproducing system 1 includes the above-described optical disc reproducing device 10 and the optical disc reading device 20 that outputs information read from the optical disc 5 to the optical disc reproducing device 10.

  According to such an optical disc reproduction system 1, even if the activation of the optical disc reader 20 is completed and the optical disc 5 is replaced before the activation of the optical disc reproduction device 10 is completed, the optical disc reproduction device 10 is replaced alone. Therefore, it is possible to prevent malfunction of the optical disc playback apparatus 10. Further, since the optical disk reading device 20 does not need to detect the replacement of the optical disk 5, it can be easily dealt with by adding a function only to the optical disk reproducing device 10, so that the existing optical disk reading device 20 is used as it is. Can do. Therefore, since the optical disk 5 can be exchanged even while the optical disk playback apparatus 10 is activated, the optical disk playback apparatus 10 can be enhanced in functionality, and the user's operation restrictions can be relaxed, contributing to the improvement of convenience. . Furthermore, since the optical disk reproducing device 10 and the optical disk reading device 20 can be combined, the system configuration can be given a degree of freedom.

  Further, according to the optical disc reproduction system 1 described above, the optical disc reader 20 sets up the optical disc 5 based on the unique information storage means D21 for storing the unique information read from the optical disc 5 and the unique information. Setup information P21, and the discrimination information creation means P3 and the post-interruption discrimination information creation means P5 are means for acquiring the identification information having the unique information.

  According to such an optical disc reproducing system 1, the unique information read from the optical disc 5 is stored in the unique information storage means D21 of the optical disc reader 20, and the setup means P5 performs setup of the optical disc 5 based on the unique information. Is called. Then, the discrimination information creating means P3 and the post-interruption discrimination information creating means P5 of the optical disc reproducing apparatus 10 acquire identification information obtained by adding new information to the specific information. Therefore, since the identification information obtained by adding new information to the unique information used for the setup by the optical disc reader 20 is acquired, the possibility of accidental coincidence with only the unique information can be eliminated. The uniqueness of the identification information can be ensured.

  Next, an embodiment in which the above-described optical disc playback apparatus and optical disc playback system are applied to an audio system will be described below with reference to the drawings of FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the part which is the same as that of what was demonstrated in the basic structure shown in FIG. 1 mentioned above.

  In FIG. 2, an audio system 1 corresponds to the optical disk playback system in the claims shown in FIG. 1, and includes a decoder 10 such as an optical disk playback device, a personal computer (computer), a video / music playback device, and the product 10. And an external peripheral device or a built-in drive 20 that are communicably connected. The decoder 10 and the drive 20 are activated simultaneously in response to power supply in response to a power ON operation of the power switch of the audio system 1, generation of a reset signal, and the like.

  Examples of the optical disk 5 include the above-described CD-DA, CD-ROM, DVD-ROM, DVD-R, DVD-RW, MD, BD, and MO. In the following description, the case where the optical disc 5 is a BD will be described. However, the optical disc 5 can be any recording medium from among the above-described plural types of recording media.

  The decoder 10 corresponds to the optical disk reproducing device in the claims shown in FIG. 1, and includes a microcomputer 11, a memory 12, and a communication unit 13. Although not shown, the microcomputer 11 is, as is well known, a central processing unit (CPU) that performs various processes and controls according to a predetermined program, and a read-only memory that stores programs for the CPU. It is configured to have a certain ROM, a RAM which is a readable / writable memory which stores various data and has an area necessary for the processing operation of the CPU.

  For example, a display device 14 such as a liquid crystal display is electrically connected to the microcomputer 11. The decoder 10 and the display device 14 are integrated into a product such as an optical disc playback device, a personal computer (personal computer), and a video / music playback device. The microcomputer 11 executes application programs stored in the built-in ROM, the memory 12, etc., thereby transmitting / receiving various information to / from the drive 20 via the communication unit 13 and receiving from the drive 20. Play back the information.

  The ROM includes the reproduction means P1, the identification information acquisition means P2, the discrimination information creation means P3, the post-interruption identification information acquisition means P4, the post-interruption discrimination information creation means P5, and the judgment means P6 in the claim shown in FIG. As the various means such as, an optical disc start-up reproduction program for causing the CPU (computer) of the microcomputer 11 to function is stored.

  The memory 12 is a recording medium capable of holding various stored data even when power supply is cut off, and an electrically erasable / rewritable memory having various storage areas necessary for processing operations of the microcomputer 11 ( EEPROM, flash memory, FRAM, etc.) are used. The memory 12 stores various information such as a last address 12a at the time of reproduction interruption, discrimination information 12b described later, identification information, and the like.

  As the communication unit 13, for example, various communication devices that perform mutual communication with the drive 20 according to standards such as ATAPI (AT Attachment Packet Interface) and USB (Universal Serial Bus) are used. In the present embodiment, description will be made on the assumption that the communication unit 13 performs communication according to the ATAPI standard. The communication unit 13 transmits various information such as an acquisition request from the microcomputer 11 to the drive 20, and receives various information from the drive 20 and outputs the information to the system microcomputer 11.

  Next, the drive 20 is configured to be able to record and read information on various optical disks 5 such as CD, DVD, and BD. As shown in FIG. 3, the drive 20 includes a microcomputer 21, a disk motor 22, an optical pickup 23, an RF amplifier 24, a servo signal processing unit 25, a driver 26, and audio / video signal processing. The unit 27, the memory 28, and the communication unit 29 are included.

  Similar to the microcomputer 11 of the decoder 10 described above, the microcomputer 21 includes a CPU, a ROM, a RAM, and the like. The microcomputer 21 controls the entire drive 20 in each operation such as insertion and ejection of the optical disk 5, recording / reproduction and stop.

  The disk motor 22 is a motor for rotating the optical disk 5 set in the optical drive 20, and is constituted by, for example, a spindle motor.

  The optical pickup 23 emits light onto a laser diode of a wavelength for CD, a laser diode of a wavelength for DVD, a laser diode of a wavelength for BD, or an optical disc 5 as a laser oscillator (not shown) that generates light to be irradiated to the optical disc 5. A lens for irradiating, an actuator for adjusting focus and tracking, and a light receiver for receiving the light reflected from the optical disk 5 are generated, and a focus error signal and a return light total signal are generated and output from the output of the light receiver.

  The RF amplifier 24 amplifies the signal output from the optical pickup 23 to a predetermined value and outputs the amplified signal to the servo signal processing unit 25.

  As the servo signal processing unit 25, a known microcomputer, DSP (Digital Signal Processor) or the like is used. The servo signal processing unit 25 uses the control program to determine the optical disc 5 and control the focus and tracking of the optical pickup 23 based on the signal input from the RF amplifier 24, and can accurately read the information recorded on the optical disc 5. Like that. Further, a signal including information such as music and video recorded on the optical disc 5 is analog / digital converted and output to the audio / video signal processing unit 27.

  The driver 26 amplifies the signal input from the servo signal processing unit 25 and outputs it to the disk motor 22 and the optical pickup 23.

  The audio / video signal processing unit 27 demodulates the signal input from the servo signal processing unit 25 into an audio or video signal, performs error correction, and outputs the signal to a DA converter (not shown). Also, the audio or video signal input from the AD converter (not shown) is encoded into a format for recording on the optical disc 5 and output to the servo signal processing unit 25.

  The DA converter converts the digital signal input from the audio / video signal processing unit 27 into an analog signal and outputs the analog signal from the video output terminal and the audio output terminal. The AD converter converts video and audio signals input from the video input terminal and the audio input terminal into digital signals and outputs the digital signals to the audio / video signal processing unit 27.

  The memory 28 is capable of holding various stored data even when the power supply is cut off, and is an electrically erasable / rewritable memory (EEPROM) having various storage areas necessary for processing operations of the microcomputer 21. Is used. The memory 28 stores unique information 51 read from the optical disc 5. The unique information 51 includes control data such as physical information of the optical disk 5 and servo adjustment values. The unique information is used in the setup process of the optical disc 5 and contributes to speeding up the setup.

  The memory 28 functions as unique information storage means in the claims shown in FIG. 1, and stores various information such as unique information. The unique information 51 is PIC (Permanent Information & Control data) when the optical disc 5 is a BD. Further, when the optical disc 5 is a CD, management data of TOC (Table Of Contents) and CD text (CD-TEXT), and when the optical disc 5 is a DVD, “Manufacturer's information”, “Physical format information”, “Physical format information in the Data such as “Lead-in”, “BCA (Burst Cutting Area)”, and the like have different data structures depending on the type of the optical disc 5.

  Further, the microcomputer 21 functions as setup means in the claims shown in FIG. 1 by executing a setup processing program, and performs various adjustments other than gain adjustment to obtain optimum playback conditions for the mounted optical disk 5. As a result, the optimum reproduction condition of the optical disk 5 is set.

  As the communication unit 29, various communication devices, interfaces, and the like are used. In the present embodiment, the communication unit 29 performs mutual communication with the product 10 according to the ATAPI (AT Attachment Packet Interface) data transfer method standard. The communication unit 29 transmits various information input from the microcomputer 21 to the product 10 and outputs various information such as an acquisition request received from the product 10 to the microcomputer 21.

  Next, an example of the software configuration of the decoder 10 and the drive 20 configured as described above will be described below with reference to the drawing of FIG.

  In FIG. 4, a decoder 10 provides basic functions commonly used by various software such as an application 10a, an optical disc playback middleware 10b, an ATAPI communication 10c, and the like. An operating system (OS) 10d for managing the system. As the OS 10d, for example, Linux or the like can be arbitrarily used, or unique management software can be used.

  The drive 20 has a real-time OS 20c for various software such as ATAPI communication 20a and optical disc control 20b to execute processing in real time. The real-time OS 20c can use a well-known ITRON or the like.

  As described above, by installing the OS 10d and the real-time OS 20c in each of the decoder 10 and the drive 20, it is possible to cope with complicated decoding processing, diversified functions, and the like. However, by installing each OS, as with a personal computer or the like, the time from when the power is turned on until the start is completed and the operation becomes possible is slower than before. In this embodiment, the decoder 10 takes about 20 seconds to complete startup, whereas the drive 20 completes startup in less than 1 second, which is faster than that. Further, the time until the activation of the decoder 10 is delayed as the function of the decoder 10 increases. Therefore, when the decoder 10 and the drive 20 are activated simultaneously, the activation of the drive 20 is completed first, and then the activation of the decoder 10 is completed.

  Next, an example of the determination information created by the decoder 10 described above will be described below with reference to the drawing of FIG.

  The decoder 10 acquires the above-described unique information 51 (corresponding to unique data) and user information 52 (corresponding to actual data) as identification information from the drive 20, and uses these information and a hash function, for example, about 256 bits or the like. A hash value is calculated, and determination information having the hash value is created. The user information 52 can be set as arbitrary data such as all data for a predetermined sector from the top of the optical disc 5. If the predetermined number of sectors in the user information 52 is increased, the uniqueness can be improved. Further, in this embodiment, a case where determination information is created using a hash function will be described, but instead of this, for example, determination information is created by compression using various algorithms, and entry is made using a hash table. Different embodiments can be made, such as creating decision information.

  Further, the unique information 51 is vendor-defined and not defined by the type of the optical disc 5 and may coincide, but like the identification information, the unique information 51 and the user information 52 may be coincident. The uniqueness of the identification information can be improved.

  Next, an example of a reproduction control process performed by the microcomputer 11 of the decoder 10 executing the above-described reproduction program at startup will be described below with reference to a flowchart shown in FIG.

  The microcomputer 11 determines whether or not the last address 12a is stored in the memory 12 in step S11 shown in FIG. This determination is made based on whether the last address 12a is set or not (NULL). If the microcomputer 11 determines that the last address 12a is not stored (N in S11), the microcomputer 11 executes the disk reproduction process in step S12, thereby using the optical disk reproduction middleware 10b to store the optical disk 5 in the drive 20. The optical disc playback middleware 10b converts the input signal such as music or video from the drive 20 based on a certain rule, generates an output signal, outputs it to the display device 14, and thereafter The process proceeds to step S13.

  In step S13, the microcomputer 11 acquires identification information including the unique information 51 and the user information 52 shown in FIG. 5 from the information received from the drive 20 via the communication unit 13, and stores the identification information in the memory 12 or the like. Proceed to S14. In step S14, the microcomputer 11 calculates a hash value from the identification information and the hash function, creates discrimination information having the hash value, stores it in the memory 12, and then proceeds to the processing of step S20.

  If the microcomputer 11 determines in step S11 that the last address 12a has been set (Y in S11), the microcomputer 11 executes the last address reproduction process in step S15, thereby using the optical disc reproduction middleware 10b. The drive 20 is requested to reproduce from the last address of the optical disc 5, and the optical disc reproduction middleware 10b converts an input signal such as music or video from the drive 20 based on a certain rule, generates an output signal, and displays it. 14 and then the process proceeds to step S16.

  In step S16, the microcomputer 11 acquires the identification information including the unique information 51 and the user information 52 from the information received from the drive 20 via the communication unit 13, stores the identification information in the memory 12, etc., and then proceeds to step S17. If the previous identification information is used, the process in step S16 is deleted. In step S17, the microcomputer 11 calculates a hash value from the identification information and the hash function, creates post-startup discrimination information having the hash value, and stores it in the memory 12 in step S17. The process proceeds to S18.

  In step S18, the microcomputer 11 compares whether the discrimination information in the memory 12 and the like and the discrimination information after activation match. If the microcomputer 11 determines that they match (Y in S18), the microcomputer 11 determines that the mounted optical disk 5 is the optical disk 5 for which the last address reproduction has been interrupted, and then proceeds to the processing of step S20. On the other hand, if the microcomputer 11 determines that they do not match (N in S18), the microcomputer 11 determines that the optical disk 5 has been replaced while the decoder 10 is running, and requests the drive 20 to stop the last address reproduction in step S19. Then, the reproduction from the head of the optical disk 5 is requested, and then the process proceeds to step S20.

  In the process of step S20, the microcomputer 11 determines whether or not a reproduction stop request has been received in response to the occurrence of a power interruption due to the user's termination operation. If the microcomputer 11 determines that the reproduction stop request has not been received (N in S20), the microcomputer 11 waits for the generation of the reproduction stop request by repeating this determination process. On the other hand, if the microcomputer 11 determines that a reproduction stop request has been received (Y in S20), the microcomputer 11 proceeds to the process of step S21.

  The microcomputer 11 determines whether or not the power is off when the optical disk 5 is mounted. If the microcomputer 11 determines that the power is not turned off when the optical disk 5 is mounted (N in S21), the process ends thereafter. On the other hand, if the microcomputer 11 determines that the power is off when the optical disk 5 is mounted (Y in S21), the microcomputer 11 proceeds to the process of step S22.

  In step S22, the microcomputer 11 obtains the last address 12a of the optical disc 5 at the time of the power interruption and stores it in the memory 12, stores the above-described discrimination information 12b in association with the last address 12a and stores it in the memory 12, and thereafter performs processing. Exit.

  When the microcomputer 11 executes the reproduction control process shown in FIG. 5 described above, the reproduction means P1, the identification information acquisition means P2, the discrimination information creation means P3, and the interruption in the claim of the claim shown in FIG. The microcomputer 11 functions as the post-identification information acquisition unit P4, the post-interruption discrimination information creation unit P5, and the determination unit P6. In the flowchart shown in FIG. 6, steps S12 and S15 are reproduction means P1, step S13 is identification information acquisition means P2, steps S14 and S23 are discrimination information creation means P3, and step S16 is identification information acquisition means P4 after interruption. S17 corresponds to post-interruption discrimination information creation means P5, and step S18 corresponds to judgment means P6.

  Next, an example of the operation (action) of the decoder 10 and the drive 20 in the audio system 1 described above will be described below.

  In the audio system 1, when the reproduction of the optical disk 5 is started by the decoder 10 and the drive 20, the decoder 10 acquires the unique information 51 and user information 52 of the optical disk 5 read by the drive 20 as identification information. Then, the decoder 10 calculates a hash value from the identification information and the hash function, creates discrimination information 12b having the hash value, and stores it in the memory 12.

  When the power of the audio system 1 is turned off with the optical disc 5 mounted, the decoder 10 and the drive 20 are terminated after receiving termination requests and performing termination processing. At this time, the decoder 10 stores the last address 12a in the memory 12, and associates the determination information 12b with the last address 12a and stores it in the memory 12, and then ends the processing.

  Thereafter, when the audio system 1 is powered on with the optical disk 5 mounted, each of the decoder 10 and the drive 20 is activated. The drive 20 stores the unique information 51 read from the mounted optical disk 5 in the memory 28 and completes the activation after setting up the optical disk 5 and enters a standby state. On the other hand, the decoder 10 performs loading and initial processing of the application 10a, initial processing of the optical disc playback middleware 10b, and the like.

  When the eject key is operated during the activation of the decoder 10, the drive 20 ejects the optical disc 5, and thereafter, when a different optical disc 5 is loaded, the setup for the optical disc 5 is performed. Thereafter, when the activation of the decoder 10 that has been activated is completed, the decoder 10 determines whether or not the last address 12 a is stored in the memory 12. Then, the decoder 10 requests the drive 20 to start reproduction from the last address 12a.

  The decoder 10 acquires the unique information 51 and user information 52 of the optical disc 5 from the drive 20 as identification information, calculates a hash value from the identification information and a hash function, creates post-startup discrimination information, and stores it in the memory 12. . The decoder 10 compares the discriminating information after activation with the discriminating information before activation, that is, when the power is turned off. If they do not match, the decoder 10 causes the drive 20 to stop the last address reproduction and the optical disc 5 is Play from. On the other hand, the decoder 10 continues the last address reproduction if they match.

  According to the decoder 10 described above, the discriminating information 12b of the optical disc 5 is stored together with the last address 12a when the reproduction is interrupted, and new identification information is acquired from the optical disc 5 when the activation is completed after the reproduction is interrupted to discriminate after the interruption. Information is created, and the discriminating information after the interruption and the discriminating information 12b are compared to determine whether or not the optical disc 5 before and after activation is the same, and only when it is determined that the optical disc 5 is the same, reproduction is performed from the last address 12a. Therefore, even if the activation of the drive 20 is completed and the optical disk 5 is replaced before the activation of the optical disc playback apparatus 10 is completed, the decoder 10 can recognize the replacement independently. Malfunctions can be prevented. Further, since the drive 20 does not need to detect the replacement of the optical disk 5, it can be easily handled by adding a function only to the decoder 10, so that the existing drive 20 can be used as it is. Therefore, since the optical disk 5 can be exchanged even when the decoder 10 is activated, it is possible to increase the functionality of the decoder 10 and to ease the restriction on the operation of the user, thereby contributing to the improvement of convenience. In particular, it is suitable as a decoder 10 for an optical disc such as a Blu-ray disc having a large system configuration.

  In addition, since the identification information is converted into a fixed-length character string or a pseudo-random number by using a hash function and the discrimination information 12b and post-interruption discrimination information are created, even if the data size of the identification information is increased, Since the data size of the determination information 12b and the determination information after interruption based on the identification information can be reduced, the uniqueness of the identification information can be improved. Moreover, since the possibility that the different discrimination information 12b and the post-interruption discrimination information coincide with each other can be reduced, the discrimination accuracy of the optical disc 5 before and after startup can be improved. Furthermore, since the data amounts of the discrimination information 12b and the post-interruption discrimination information can be reduced, it is possible to prevent the capacity of the memory 12 serving as the discrimination information storage means D2 from increasing.

  Further, since the identification information includes the unique information 51 of the optical disc 5 and the user information 52, the unique information 51 of the optical disc 5 is not defined by the standard, and therefore, the unique information 51 alone may coincide by chance. However, the uniqueness of the identification information can be ensured by adding the user information 52 to the unique information 51. Therefore, the discrimination accuracy of the discrimination information 12b created based on the identification information and the discrimination information after interruption can be further improved.

  In the above-described embodiment, the case where the optical disk playback device in the claims is the decoder 10 has been described. However, the present invention is not limited to this. For example, the display device 14, the optical disk playback device, the recording / recording device described above, and the like. Various embodiments such as incorporation in a regenerator and the like can be made.

  In the above-described embodiment, when the decoder 10 is activated and the last address 12a is stored in the memory 12, the last address reproduction is started. Thereafter, when the replacement of the activated optical disk 5 is detected, the last address is detected. The case where playback is stopped has been described. Alternatively, the last address reproduction may be started after determining that the optical disk 5 has not been replaced while the decoder 10 is running.

  Further, in the above-described embodiment, the case where the optical disk reproduction system of the present invention is the audio system 1 has been described. Instead, it can also be realized by various optical disk playback devices such as a home / car audio device, a car navigation device, and a personal computer.

  As described above, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1 Optical disk playback system (audio system)
5 Optical disk 10 Optical disk playback device (decoder)
20 Optical disk reader (drive)
D1 playback interruption position storage means D2 discrimination information storage means D21 unique information storage means P1 playback means P2 identification information acquisition means P3 discrimination information creation means P4 post-interruption identification information acquisition means P5 post-interruption discrimination information creation means P6 determination means P21 setup means

Claims (7)

The optical disk reader has a reproducing means for reproducing information read from the optical disk, and a reproduction interruption position storage means for storing the reproduction interruption position of the reproduction means at the time of reproduction interruption, and the activation of the optical disk reading apparatus is completed. In an optical disk playback device that completes startup later than
Identification information acquisition means for acquiring identification information for identifying the optical disk reproduced by the reproduction means from information read by the optical disk reader;
Discriminating information creating means for creating discriminating information indicating the optical disc at the time of the reproduction interruption based on the identification information acquired by the identification information acquiring means;
Discrimination information storage means for storing discrimination information created by the discrimination information creating means;
A post-interruption identification information acquisition means for acquiring the identification information from the information read by the optical disc reader when the reactivation after the playback is completed;
Post-interruption discrimination information creating means for creating post-interruption discrimination information based on the identification information acquired by the post-interruption identification information acquisition means;
A determination means for comparing the determination information stored in the determination information storage means with the determination information after interruption to determine whether the optical discs before and after starting are the same;
Have
When it is determined that the reproduction means is the same by the determination means, the information is reproduced from the reproduction interruption position stored in the reproduction interruption position storage means, and is not the same by the determination means. An optical disc reproducing apparatus, wherein when judged, the optical disc is a means for reproducing from the beginning of the optical disc.   The discrimination information creating means and the post-interruption discrimination information creation means are means for generating the discrimination information and the post-interruption discrimination information by converting the identification information into a fixed-length character string or a pseudo-random number. The optical disk reproducing apparatus according to claim 1.   3. The optical disk reproducing apparatus according to claim 1, wherein the identification information includes unique data and actual data of the optical disk.   An optical disc playback system comprising: the optical disc playback device according to claim 1; and the optical disc reader that outputs information read from the optical disc to the optical disc playback device. The optical disc reader has unique information storage means for storing unique information read from the optical disc, and setup means for setting up the optical disc based on the unique information,
5. The optical disc playback system according to claim 4, wherein the discrimination information creating means and the post-interruption discrimination information creating means are means for acquiring the identification information obtained by adding new information to the unique information. The optical disk reader has a reproducing means for reproducing information read from the optical disk, and a reproduction interruption position storage means for storing the reproduction interruption position of the reproduction means at the time of reproduction interruption, and the activation of the optical disk reading apparatus is completed. In the start-up playback method of the optical disk playback device, which completes startup later than
Obtaining identification information for identifying the optical disc reproduced by the reproducing means from information read by the optical disc reader;
Creating discriminating information indicating the optical disc at the time of the reproduction interruption based on the acquired identification information;
Storing the created discrimination information in the discrimination information storage means;
A step of acquiring the identification information from the information read by the optical disc reader when the start-up after the reproduction interruption is completed;
Creating post-interruption discrimination information based on the acquired identification information;
Comparing the discrimination information stored in the discrimination information storage means and the post-interruption discrimination information to determine whether the optical discs before and after starting are the same;
When it is determined that the optical discs are the same, the reproduction means reproduces information from the reproduction interruption position stored in the reproduction interruption position storage means;
When it is determined that the optical discs are not identical, the process of reproducing the information from the beginning of the optical disc,
A playback method at the time of startup of an optical disk playback device characterized by comprising: The optical disk reader has a reproducing means for reproducing information read from the optical disk, and a reproduction interruption position storage means for storing the reproduction interruption position of the reproduction means at the time of reproduction interruption, and the activation of the optical disk reading apparatus is completed. The computer of the optical disk playback device that completes starting later than
Identification information acquisition means for acquiring identification information for identifying the optical disk reproduced by the reproduction means from information read by the optical disk reader;
Discriminating information creating means for creating discriminating information indicating the optical disc at the time of the reproduction interruption based on the identification information acquired by the identification information acquiring means;
Means for storing the discrimination information created by the discrimination information creation means in the discrimination information storage means;
A post-interruption identification information acquisition means for acquiring the identification information from the information read by the optical disc reader when the reactivation after the playback is completed;
Post-interruption discrimination information creating means for creating post-interruption discrimination information based on the identification information acquired by the post-interruption identification information acquisition means;
A determination means for comparing the determination information stored in the determination information storage means with the determination information after interruption to determine whether the optical discs before and after starting are the same;
When it is determined that the reproduction means is the same by the determination means, the information is reproduced from the reproduction interruption position stored in the reproduction interruption position storage means, and is not the same by the determination means. When judged, an optical disc start-up reproduction program for functioning as means for reproducing from the beginning of the optical disc.

Images