JP3475998B2 - Information playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a DVD-ROM medium.
Information reproducing apparatus for reproducing information on a recording medium such as a body
Things . 2. Description of the Related Art Conventionally, in a DVD (Digital Video Disk) -ROM device, digital data recorded on a DVD-ROM medium is read out by irradiating a laser beam from an optical pickup, and SCSI and the like are read. Is transferred to the higher-level control device via the interface.
Since a large amount of data can be recorded on a DVD-ROM medium, for example, a large amount of data such as image data, audio data, newspaper articles, encyclopedias, etc. is recorded, and if necessary, the DVD-ROM medium is used. It is used as a removable large-capacity storage device in which necessary data is extracted by mounting the device on a device. However, in a conventional DVD-ROM device, when a plurality of types of DVD-ROM media are required, for example, large-capacity data such as an encyclopedia is transferred to a plurality of media. In such a case, the target medium has to be replaced manually each time, and the operation is complicated. When a single DVD-ROM device is shared by a plurality of higher-level devices, such as a DVD-ROM server, if the target medium of the plurality of higher-level devices is different, it is necessary to change the medium each time. After all, work was complicated. The present invention has been made in view of the above-mentioned conventional problems.
The purpose is to eliminate the need to replace the recording medium.
In addition, the specified data can be read at high speed.
An object of the present invention is to provide a possible information reproducing apparatus . [0005] In order to achieve the above object, the present invention provides a plurality of drive units provided for a plurality of recording media and driving the mounted recording media,
An optical pickup provided corresponding to each drive unit, for irradiating a recording medium in the drive unit with a light beam, and reproducing information of a recording medium designated in response to a request from a higher-level device; When the same recording medium is mounted on the plurality of drive units,
One optical pickup corresponding to each drive unit
Means for placing a flop at a position shifted in the forward radially for each recording medium, are offset in the forward radially for each of the recording medium when there is a read request from said upper device
Means for selecting an optical pickup closest to the designated read position among the plurality of optical pickups , and means for reproducing the designated information from the recording medium corresponding to the selected optical pickup. And According to the present invention, when the same recording medium is mounted on a plurality of drive units, a plurality of optical pickups are arranged at positions sequentially shifted in the radial direction of the recording medium, and when a read request is issued from an upper apparatus, a plurality of optical pickups are arranged. selects the closest optical pickup to the designated reading position of the optical pickup, by reproducing the information of the position designated by the recording medium corresponding thereto by the optical pickup, information can be read out at high speed. Next, an embodiment of the present invention will be described in detail with reference to the drawings. First, a reference example of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a reference example of the present invention. In FIG. 1, first, the DVD-R
The OM device 20 is a host device 3 such as a host computer.
0 is connected as an external storage device. DVD-RO
The M device 20 transmits and receives commands and data to and from the higher-level device 30, and performs DVD-R based on a command from the higher-level device 30.
The data recorded on the OM medium is reproduced . [0008] The DVD-ROM device 20 includes a DVD-ROM for transmitting and receiving commands and data to and from the host device 30.
An interface unit 1 serving as an entrance / exit of the ROM device 20, a command interpreting unit 2 for analyzing a command from the host device 30, a command control unit 3 for controlling each unit based on the analyzed command, and a plurality of units mounted in the device. D
A DVD index recording mechanism 4 for reading and managing medium information (index information) of the VD-ROM media D1 to Dn is provided. Here, in this reference example, a plurality of DVD-
Has a structure in which the ROM media D1 to Dn can be mounted,
Circuits and mechanisms necessary for reading data are provided for a plurality of media. That is, the drive units 51 to 5n for storing and rotating the media, the optical pickups 61 to 6n for irradiating the medium with light beams and detecting the reflected light from the media, and the optical pickups for the plurality of media D1 to Dn. Optical pickup control mechanisms 71 to 7 for controlling positions
n, reading data from the medium by controlling the optical pickup
Are provided. Next, a specific operation of the present embodiment will be described. First, when a plurality of CD-ROM media D1 to Dn are mounted on each drive unit, in each drive unit, index information (for example, index information) for identifying the medium recorded in advance on the medium by the corresponding data reading means and optical pickup is used. Number and name indicating medium)
Is read and transferred to the DVD index recording mechanism 4. Also, each drive unit is given a number in advance (for example, the number 1 from the unit on the left side of the drawing,
2,... N), the DVD index recording mechanism 4 creates a correspondence table indicating the correspondence between the drive unit and the medium on the internal memory, as indicated by 4A in the figure. By referring to this correspondence table, it is possible to know which medium is mounted on which drive unit. [0011] Data must be read from the higher-level device 30
When the request command is issued, the DVD-ROM device 20 fetches the command through the interface unit 1 and transmits the command to the command interpreting unit 2. Information indicating the target medium is added to the command from the higher-level device 30. The command interpreting means 2 analyzes the command and refers to the correspondence table between the drive units of the DVD index recording mechanism 4 and the medium to find out which drive unit the specified medium is mounted on. The command interpreting means 2 transmits the command analysis result and the search result of the medium position to the command control means 3, and the command control means 3 transmits an instruction according to the request to the corresponding data reading means and optical pickup control mechanism based on the result. I do. That is, the command control means 3 performs this analysis,
Based on the search result, the optical pickup control mechanism 71 corresponding to the specified medium D1 is instructed to move the optical pickup 61 to a position on the specified medium. When the optical pickup 61 moves to the designated position, the data
The reading unit 81 is instructed to read data, and the optical pickup 61 scans a specified position on the medium D1 with a light beam to read data. The read data is transferred to the host device 30 through the interface unit 1. In this embodiment, since a plurality of media are simultaneously loaded and the designated medium can be reproduced , the designated medium can be designated only by the higher-level device without necessity of replacing the medium. The reproduced medium can be reproduced .
In particular, large volumes of data span multiple media,
In the case of handling a large number of diversified data, it is not necessary to change the medium, so that the work efficiency can be significantly improved. Further, since a plurality of media can be reproduced simultaneously , the work efficiency can be improved by performing the work while reading dictionary data or drawing data from each medium, for example. Furthermore, the upper device, DV
By operating as a DVD-ROM server including a D-ROM device, one set (plurality) of media can be shared, and highly airtight data and the like that cannot be copied can be centrally managed. FIG. 2 is a block diagram showing one embodiment of the present invention. In this embodiment, an optical pickup selection control unit 15 is provided in addition to the configuration of FIG. In the present embodiment, first, the same medium will be described as being mounted on each drive unit. The DVD-ROM index recording mechanism 4 creates a correspondence table between the medium and the drive unit in the same manner as when the medium is mounted. However, when recognizing that the same medium is mounted in each drive unit,
That effect is notified to the optical pickup selection control means 15.
At this time, the optical pickup selection control means 15 shifts the positions of the optical pickups corresponding to the plurality of media in the radial direction of the media by controlling each optical pickup control mechanism. For example, assuming that the number of media is n, the radial distance of the media is divided by n, and the positions of the optical pickups are sequentially shifted by 1 / n. In this state, when there is a read request from the host device 30, the optical pickup selection control means 15 selects the drive unit where the optical pickup is located closest to the designated read position. Next, the optical pickup control mechanism corresponding to the selected drive unit is instructed to move the optical pickup to a designated position, and data is read. The read data is similarly transferred to the upper device 30 via the interface unit 1. In the present embodiment, a plurality of optical pickups are made to stand by in a state shifted by a predetermined interval, so that data can be read at high speed. As described above, according to the present invention, multiple
When the same recording medium is mounted on
Shift multiple optical pickups sequentially in the radial direction of the recording medium
At the specified position, and when a read request is
The optical pickup at the specified position
Select the closest optical pickup and select the selected optical pickup.
Read data with the
Can be done at high speed .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a reference example of the present invention. FIG. 2 is a block diagram showing a configuration of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 Interface unit 2 Command interpreting means 3 Command control means 4 DVD index recording mechanism 15 Optical pickup selection control means 20 DVD-ROM device 30 Upper device 51-51n Drive units 61-61n Optical pickup 71-71n Optical pickup Control mechanism 81-81n data reading means

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 27/10 G11B 17/22 G06F 3/06-3/08

Claims (1)

(57) [Claim 1] A plurality of drive units provided corresponding to a plurality of recording media and driving the mounted recording media, and provided corresponding to each of the drive units, respectively. An optical pickup for irradiating the recording medium with an optical beam, and reproducing information of the recording medium designated in response to a request from a higher-level device, wherein the same recording medium is mounted on the plurality of drive units. One optical pick corresponding to each drive unit when activated
Means for arranging the recording media in a position shifted in the radial direction for each recording medium, and arranging the recording media in a sequence shifted in the radial direction for each of the recording media when a read request is issued from the upper device.
Means for selecting an optical pickup closest to a designated read position among the plurality of optical pickups , and means for reproducing designated information from a recording medium corresponding to the selected optical pickup. Characteristic information reproducing device.