KR20150022274A - optical disc drive and driving method thereof - Google Patents

optical disc drive and driving method thereof Download PDF

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Publication number
KR20150022274A
KR20150022274A KR20130099891A KR20130099891A KR20150022274A KR 20150022274 A KR20150022274 A KR 20150022274A KR 20130099891 A KR20130099891 A KR 20130099891A KR 20130099891 A KR20130099891 A KR 20130099891A KR 20150022274 A KR20150022274 A KR 20150022274A
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KR
South Korea
Prior art keywords
host
drive
optical disc
information
file system
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Application number
KR20130099891A
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Korean (ko)
Inventor
이호석
Original Assignee
도시바삼성스토리지테크놀러지코리아 주식회사
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Application filed by 도시바삼성스토리지테크놀러지코리아 주식회사 filed Critical 도시바삼성스토리지테크놀러지코리아 주식회사
Priority to KR20130099891A priority Critical patent/KR20150022274A/en
Publication of KR20150022274A publication Critical patent/KR20150022274A/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

The present invention relates to an optical disk drive capable of being connected to a host by using a virtual multi-logical drive and a driving method thereof. The optical disk drive is connected to the host for communicating an information processor with the host. The present invention comprises an interface which enables the host to access the optical disk by offering a lot of hardware information comprising the identification hardware information of the optical disk drive to the host. The present invention offers high compatibility to the host having compatibility for the optical disk.

Description

[0001] The present invention relates to an optical disc drive and a driving method thereof,

A display device such as a television, an electronic frame, or the like, or a multimedia player for reproducing a moving picture or a sound source, and the driving method thereof.

An optical disk drive, which is one of optical media devices, is a representative information storage and reproduction device. Typical formats of optical discs are CD (Compact Disc) and DVD (Digital Versatile Disc), and the width of BD (Blue ray Disc) is gradually widening. Most DVD media devices have compatibility with a low capacity CD (Compact Disc). In recent years, optical media devices having compatibility with CD, DVD, and BD have been introduced.

A typical information display device includes a general-purpose device such as a computer, while a conventional device includes a public-wave receiver, that is, a television. A television is a general multimedia display device capable of playing various information by expanding its function as a multimedia player capable of being connected to the Internet. In recent years, such a television and a peripheral device are allowed to be connected to play back various contents stored in a peripheral device.

Hosts including these televisions allow a limited range of connectivity, and thus lack compatibility with various types of media. Techniques for compensating for the lack of compatibility have been proposed, but development of background technology that can be used without any inconvenience is required in actual application of the technology.

KR 10-2005-0118731 A KR 10-115164 B US 2010-195461 A JP 2008-107965 A

The present invention provides an optical disc drive and a method of driving the same that have a wide compatibility with a host that is incompatible with the optical disc drive.

An optical disc drive according to the present invention comprises:

An information processor for processing information related to the optical disc; And,

Providing a host with a plurality of pieces of hardware information including unique hardware information of an optical disc drive by connecting the information processor to the host so as to enable communication with the host, And an interface connected to the information processor for accessing the optical disc.

A method of driving an optical disc drive according to the present invention includes:

Connecting the optical disc drive to the host; And

Providing the host with a plurality of hardware information including unique hardware information of the optical disc drive to allow the host to access the optical disc in connection with the information processor based on at least one piece of hardware information; ; ≪ / RTI >

According to an embodiment of the present invention, the interface may provide information of a second logical drive based on first logical drive information for unique hardware information of the optical disc drive and hardware information recognizable by the host.

According to an embodiment of the present invention, the interface includes a conversion unit for converting file system information of a unique format of the optical disc to information of a file system allowed by the host.

According to another embodiment of the present invention, the second logical drive is included in a direct access block device using an SBC instruction set.

According to another embodiment of the present invention, the file system of the unique format is a Compact Disc File System (CDFS) or a Universal Disc Format (UDF) defined by ISO 9660, , International Organization for Standardization (FAT) 9293).

According to another embodiment of the present invention, the interface includes a virtual USB hub connected to the host.

In the method of driving an optical disc drive according to the present invention, when a disc is replaced with an optical disc drive connected to the host, only the logical drive communicating with the host is released and the information of the other logical drive is released, The logical drive is released.

According to the present invention, it provides a spicy high compatibility for a host having compatibility with an optical disc. To this end, the present invention provides a host connected to an optical disc drive with hardware information specific to an optical disc drive and one or a plurality of other hardware information having generality in connection with a host, Lt; / RTI > of the logical drive of the computer. The host can access the desired contents selectively recorded on the optical disc through the plurality of connected logical drives.

FIG. 1 illustrates a connection structure between an optical disc drive and a host according to the present invention.
2 is a schematic block diagram of an optical disc drive according to the present invention.
3 is a view for explaining a connection state between an optical disc drive and a host according to the present invention.
4A is a view for explaining a configuration of a plurality of virtual logical drives mapped by a host in a connected state of an optical disc drive and a host according to the present invention.
FIG. 4B is a schematic diagram of virtual logical drives recognized by a host when the optical disc drive according to the present invention is connected to a host, as shown in FIG. 4A.
5 is a diagram illustrating a single mapping for a first logical drive upon release of an unnecessary second logical drive after an optical disk is replaced with an optical disk drive connected to a host compatible with the ODD.
6 is a diagram illustrating a single mapping to a second logical drive due to the release of an unnecessary first logical drive after an optical disk is replaced with an optical disk drive connected to a host that is incompatible with the ODD.

Hereinafter, embodiments of an optical disc drive and a driving method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

The optical disc or optical media described in the embodiments includes all media in the form of a disc in which information is physically recorded on a disc-shaped medium. These media include CD, DVD (DVD-R, DVD-RW, DVD + R, DVD + RW, DVD-RAM) and BD, which have a unique file system. A typical file system of an optical disc may include CDFS, UDF, and the like. The optical disk is mounted on an optical disk drive having an interface that can be connected to an external host, such as a public wireless receiver. Although these optical disks are separate independent entities, they may be interpreted as some elements of the optical disk drive because their essential functions can be exercised by the optical disk drive.

As shown in FIG. 1, the optical disk drive 10 is connected to the host 20 such as a PC (Personal Coupon), an AV (Audio-Video) device, etc. as a peripheral device or a slave by an inter cable 30.

The exchange of information via the inter-cable 30 is performed by the interface of the two devices, and the interface may typically include a USB port. 1.1, 2.0, and 3.0. That is, a USB cable can be used as the inter cable 30, and thus the optical disc drive 10 and the AV apparatus as the host 20 can exchange mutual information by the USB protocol.

A host 20, such as an AV device such as a television or electronic frame, to which an external slave device can be connected supports a limited range of file systems. Typically, it is FAT or FAT32. This is not limited to HDD (Hard Disc Drive), but also various types of memory cards such as CF (Compact Flash), SD (Secure Digital), MMC (Multi Media Card) . There are many other file systems, but hosts can not support all of them, and generally only some of the most widely used file systems. As the host 20, there are various products having AV contents such as multimedia contents in addition to the reception of the airwave broadcasting. The contents for reproduction of the AV apparatus can be obtained from a slave such as the optical disk drive 10 which is externally connected. However, for example, AV devices that do not support CDFS / UDF and that support only the FAT file system can not accept content from optical media devices of the CDFS / UDF file system provided on the optical disc. The embodiments described below are intended to ensure connectivity of an optical disc drive to various types of hosts that support a limited range of file systems and to provide a file system unique to the optical disc drive to a host such as a television And transmits the converted data.

FIG. 2 shows the entire block structure of the optical disc drive 10 according to an embodiment of the present invention.

The optical disc drive 10 includes an optical pickup 12 for reading or writing information from the optical disc 11. [ The optical pickup 12 includes an optical system such as an objective lens, a laser diode (LD), and a photodetector, and a mechanical system that mechanically supports the optical system and causes focusing and tracking operations as in a general structure. The optical system includes an encoder / decoder and is connected to an information processing unit 13 connected to an interface 15 for connection to an external host, and the mechanical system is connected to the servo unit 14. The information processing unit 13, the servo unit 14, and the interface 15 are controlled by the central control unit 16.

According to one embodiment, the interface 15 comprises a virtual hub and a logical drive. This provides concurrently a second logical drive defining the ODD and a second logical drive defining a direct-access block device used by most host devices to provide compatibility for various hosts. Two or more such logical drives may be provided. Figure 3 shows an optical disc drive in which two logical drives are provided. As shown in Fig. 3, includes a virtual USB hub 15a and a plurality of logical drives 15b and 15c. The interface 15 provides a plurality of pieces of hardware information to the host so that the host 20 can perform mapping based on a plurality of pieces of hardware information. As is well known, mapping in a host is a process of connecting (allocating) an external device having a single function to a unique address.

That is, according to the present invention, the interface 15 includes hardware information unique to the optical disc drive (ODD) (first logical drive), general-purpose hardware information (second logical drive) A direct access block device such as a HDD or the like. The present invention provides virtual hardware information to a host so that a host that is incompatible with the optical disk drive is compatible with general hardware information. In other words, even when the host can not recognize the optical disc drive, the optical disc drive provides virtual hardware information such as an HDD that the host can recognize so that the host can access the optical disc drive as a direct access block device , For example, as an HDD.

However, in the case of a device having compatibility with most devices, for example, in the case of a PC, the optical disk drive is not only recognized as the first logical drive but also is mapped to the virtual hardware information, 2 logical drive, such as an HDD. As a result, for a single optical disc, a host having a wide variety of usability such as a PC recognizes one optical disc drive as two devices, for example, an optical disc drive and a hard disc drive (or external memory) Lt; / RTI >

In order to recognize the optical disk drive 10 connected to the host 20 by one inter-cable 30 as a plurality of hardware devices, a hub device is required. As this hub device, a USB hub 15a can be applied. In the present invention, when the interface 15 is connected to the host 20, it transmits virtual hardware information such as 09h code defined in the USB class code to the host to be recognized as the USB hub 15a (http: / / /www.usb.org/developers/defined_class/#BaseCalss09h). That is, when the interface 15 is connected to the host 20, the host 15 provides virtual (or false) hardware information so that the host can recognize the interface as a USB hub. In addition, (ODD) 1b using a plurality of hardware, for example, an MMC-5 (ATAPI) command set, by providing hardware information of the device code 05h and the most common SBC (SCSI 00h corresponding to a direct access block device such as a magnetic disk drive (HDD) 15c, which uses a small computer system interface (" Block Commands ") command set. Thus, the host recognizes that the optical disk drive and the HDD are connected to the USB hub, and the host has successfully mapped the device first logical drive 15b, for example, the ODD or the second logical drive 15c, The optical disk 11 can be accessed through the HDD. At this time, a host having compatibility with the ODD like a PC will use an optical disk drive virtually connected to a virtual USB hub. If there are a plurality of devices mapped, the contents of the optical disk can be used through any one of them. A device that can not recognize the optical disc drive such as a television and has compatibility only with the HDD can access the contents of the optical disc through a virtual logical drive, for example, a virtual HDD.

A host having an interface capable of connecting to an external device other than a PC can recognize the optical disk drive as an external HDD or USB memory although the multimedia playback device can not recognize the optical disk drive as an external device. As described above, the optical disc drive according to the present invention provides a very wide compatibility with respect to a host that is not compatible with the ODD.

On the other hand, if the host recognizes the optical disk drive as a virtual HDD, but does not have compatibility with the unique file system CDFS / UDF of the optical disk, the host can use the file system of the optical disk, You need to convert it to FAT32. Such file system conversion can be performed by a known method. Therefore, the optical disc drive according to the present invention may include a conversion unit for converting the file system information of the CDFS / UDF format unique to the optical disc into the FAT format that can be used by the host. By doing so, the host becomes able to use the contents of the optical disc through the converted file system including the address of the contents stored on the optical disc and the like. The conversion of such a file system is preferably executed by the internal system immediately after the optical disk is inserted into the optical disk drive.

4A and 4B illustrate a virtual connection structure when an optical disc drive according to the present invention is connected to an optical disc drive according to the present invention by a host 20 such as a PC having compatibility with most external devices including an ODD .

Referring to FIG. 4A, when the interface 15 of the optical disc drive 20 is connected to the USB interface 21 of the host 20, the host assigns addresses to the respective devices. At this time, the interface 15 of the optical disk drive 10 constitutes a virtual USB hub 15a and transmits the information to the host 20. [ The host 20 recognizes the virtual USB hub 15a by 09h defined in the USB class code transmitted by the interface 15 and also recognizes two or more of the plurality of logic provided in the interface 15 Virtual) drives 15b and 15c, respectively. Thus, a structure in which two logical drives 15b and 15c are connected to a virtual USB hub 15a is obtained. At this time, in order to allow the host 20 to recognize the connection of the two logical drives 15b and 15c to the virtual USB hub 15a, a USB hub descriptor (see Universal Serial Bus Specification Revision 2.0 April 27, 2000) The number of devices inserted into the downstream connector, that is, the port number bNbrPorts, is set to two. Thus, as shown in FIG. 4B, the host 20 recognizes the two logical drives 15b and 15c as separate independent devices. The USB interface 21 of the host 20 includes a root hub as in a general PC, and four USB interfaces 21 are usually provided. An external USB hub or USB device may be connected to the root hub. According to the present invention, a virtual USB hub is connected to any one of a plurality of root hubs provided in the host. On the other hand, when the optical disk drive is inserted into the optical disk drive while connected to the PC, file system conversion can be performed. In this case, when the optical disk drive is recognized as the first logical drive, that is, as the ODD, file system conversion is not necessary, and therefore, file system conversion can be forcibly executed in this case. However, if another disk is replaced after the optical disk drive is connected to the PC, the file system of the optical disk is compatible with the file system of the PC itself. 5, the state of the connection of the virtual hub 15a remains unchanged, and bNbrPort is changed to "1 " to connect the first logical drive 15b to the first logical drive 15b, And the second logical drive 15c releases or removes it.

On the other hand, when a device incompatible with the optical disk drive, for example, an AV device, is connected as a host, access to the optical disk via the first logical drive 15b defined as an ODD is impossible. 2 logical drive 15c. In this case, it is necessary to convert the native file system of the optical disk into a file system available to the host, for example, the FAT format. When the used disk is replaced, the first logical drive defined as ODD is released.

The apparatus and method of the embodiments described above may be used in a host that does not allow or allows access to an optical disc drive but does not have hardware compatibility with the optical disc drive. Especially for hosts that do not support the native file system of the optical disc. That is, if the optical disk drive does not have connectivity and compatibility with a specific host among various hosts, for example, an AV device, the function and step of converting compatible device information and file system compatible with the host into an optical disk drive and optical And the application range is broadened by giving it to the disk drive method.

Various exemplary embodiments of the present invention have been described and shown in the accompanying drawings. However, it should be understood that these embodiments are only a part of various embodiments. Since various other modifications could occur to those of ordinary skill in the art.

Claims (15)

An information processor for processing information related to the optical disc; And,
The information processor is connected to the host so as to be able to communicate with the host so that a plurality of hardware information including unique hardware information of the optical disc drive is provided to the host so that the host can access the optical disc Interface; And an optical disk drive. The method according to claim 1,
Wherein the interface comprises a virtual USB hub connected to the host. 3. The method according to claim 1 or 2,
Wherein the interface provides information of a second logical drive based on first logical drive information for unique hardware information of the optical disc drive and hardware information recognizable by the host. The method of claim 3,
Wherein the second logical drive is included in a direct access block device using an SBC instruction aggregate. 4. The method according to any one of claims 1 to 3,
And an interface for converting the unique file system information of the optical disk into a file system allowed by the host. 5. The method of claim 4,
The unique file system is a compact disc file system (CDFS) or a universal disc format (UDF) defined by ISO 9660. The file system allowed by the host is a FAT (ISO) standard defined by the International Organization for Standardization Wherein the optical disk drive is an optical disk drive. Connecting to the host using an interface of the optical disc drive; And
Providing a plurality of pieces of hardware information including unique hardware information of the optical disc drive to the host so that the host can access the optical disc by a logical drive based on at least one hardware information of the plurality of pieces of hardware information And a drive circuit for driving the optical disc drive. 8. The method of claim 7,
Wherein a virtual USB hub is configured in the host at an interface of the optical disc drive, and the hardware information includes a plurality of logical drives connected to the virtual USB hub. 9. The method according to claim 7 or 8,
Wherein the interface provides information of a first logical drive to hardware information unique to the optical disc drive and information of a second logical drive based on hardware information recognizable by the host. 10. The method of claim 9,
Wherein the second logical drive is included in a direct access block device using an SBC instruction set. 11. The method according to any one of claims 8 to 10,
And converting the unique file system information of the optical disk to a file system allowed by the host. 12. The method of claim 11,
Wherein the unique file system is a CDFS or UDF defined in ISO 9660, and the file system allowed by the host is a FAT defined in ISO 9293. [ 11. The method of claim 10,
Wherein the unique file system is a CDFS or UDF defined in ISO 9660, and the file system allowed by the host is a FAT defined in ISO 9293. [ 9. The method according to claim 7 or 8,
Wherein when the disk used in the optical disk drive connected to the host is replaced, the logical drive other than the logical drive used among the plurality of logical drives is released. 10. The method of claim 9,
Wherein when the disk used in the optical disk drive connected to the host is replaced with another disk, the logical drive other than the logical drive used among the plurality of logical drives is released.
KR20130099891A 2013-08-22 2013-08-22 optical disc drive and driving method thereof KR20150022274A (en)

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