KR100682141B1 - Method and apparatus for detecting multi-pickup in optical disc reader - Google Patents

Abstract

A multi-pickup recognition device of an optical disk reproducer and a method thereof are provided to subdivide front-end programs corresponding to each pickup while recognition pins for distinguishing the pickups are equipped so that the subdivided programs operate on one firmware, thus each optimization module corresponding to the multiple pickups is usable according to various kinds of the pickups. A multi-pickup unit connects a random optical pickup unit(200) in the same pin array structure. The first memory(206) records firmware consisting of front-end module information which is equal to the number of optical pickup units and single back-end common module information. The second memory(208) temporarily stores a lot of operation data when an optical disk reproducer is driven. An MPEG(Motion Picture Experts Group) IC(Integrated Circuit)(204) processes data reproduced from a random optical disk(20) into A/V reproduction data, forms a front-end program area by loading the firmware from the first memory(206) in a reset state, and detects a voltage level from pins of the connected multi-pickup unit to load a module of one front-end program corresponding to the detected voltage level.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-

1 is a block diagram of a conventional optical disc reproducing apparatus,

2 is a block diagram of a multi-pickup recognition apparatus of an optical disk reproducing apparatus according to the present invention;

3 is a flowchart of a multi-pickup recognition method of an optical disk reproducing apparatus according to the present invention.

Description of the Related Art

200: Multi Pickup unit 202: Motor drive unit

204: MPEG IC 204a, 204b:

206: first memory 208: second memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing apparatus, and more particularly, to a multi-pickup recognition apparatus and method for an optical disk reproducing apparatus suitable for realizing pickup picking up by recognizing connection of various kinds of optical pick-ups.

2. Description of the Related Art In recent years, multimedia digitalization, which converts various audio and visual data of a voice and an image into digital, has been progressing rapidly through the rapid development of the Internet and information communication technology. In addition, such multimedia digitization is enabled by the development of the band compression technology and expansion of the wired / wireless communication network such as the Internet, so that a variety of multimedia data can be enjoyed by many people.

Among these multimedia contents, a so-called DVD (Digital Versatile Disc) is introduced as an example of a storage medium in which audio / video contents (hereinafter referred to as A / V contents) are recorded. And can be executed through a computer equipped with a DVD player or a DVD-ROM.

2. Description of the Related Art Generally, an optical disc such as a CD (Compact Disk), an LD (Laser Disk), a VCD (Video Compact Disk), and a DVD is recorded in an effective area in which data such as voice or video is recorded, As a medium, not only is it robust, but recorded data is not easily damaged, and it can be reproduced without noise by using a light beam, and its utilization is gradually increasing.

Such an optical disk has a very large disk capacity, so it can store music and movies. In particular, a DVD has a larger capacity than other optical disks, so that it can record a plurality of movies at once. In this way, data recorded on a CD or a DVD is reproduced through an optical disk reproduction system (e.g., a PC or a DVD player) to allow the viewer to view the desired image content.

On the other hand, in an optical pickup of an optical system in a DVD player, a laser is incident on a designated position of a disc to pick up the reflected light. A tracking servo is a tracking servo in which a light beam always follows a spiral track even if there is eccentricity with respect to the central axis of the spindle motor. A signal can be stably read by condensing light on the signal face of the disk The focusing servo is used to keep the distance between the signal surface of the disk and the objective lens constant.

As shown in FIG. 1, a typical optical disk reproducing apparatus to be servo-controlled in this manner includes an optical pickup unit 100 for recognizing and reproducing the optical disk 10, a motor (not shown) for recognizing and reproducing the optical disk 10, An MPEG IC 104 for processing the RF data reproduced from the optical disc 10 and performing A / V reproduction processing from the optical pickup unit 100, And a second memory 108 for temporarily storing various operation data when the optical disc reproducing apparatus is driven.

The MPEG IC 104 includes a servo control unit 104a for controlling the optical pickup unit 100 through a motor driving unit 102 or the like in accordance with the state of data reproduced in the optical pickup unit 100, And an MPEG processing unit 104b for decoding the reproduction data provided through the MPEG-2 format according to the MPEG format.

The first memory 106 is a flash ROM (Read Only Memory), for example, and the second memory 108 is a Synchronous Dynamic Random Access Memory (SDRAM).

In addition, although not shown in FIG. 1, the optical pickup unit 100 includes a photodetector configured by a photodiode or the like. The servo control unit 104a generates a tracking error signal (Tracking Error) TE and applies a control signal (driving voltage) corresponding to a difference between the compared two values to the motor driving unit 102. [

The motor M is constituted by a sled motor for moving the optical pickup unit 100 and a spindle motor for rotating the optical disk 10 and is driven in accordance with the control signal of the servo control unit 104a And an actuator that drives a red motor or the like to perform tracking of the optical disk 10.

At this time, the optical pickup unit 100 emits a laser diode provided therein to form a light spot on the recording surface of the optical disk 10, and the reflected light of the light spot formed as described above is reflected by a photodiode Signal. When the tracking error signal, more specifically the track data bit, is applied to the servo control unit 104a as described above, the servo control unit 104a compares the applied tracking error signal with a reference value and, based on the comparison result, The driving voltage value applied to the motor or the like is applied / subtracted so that tracking control is performed so that the tracking error signal value is maintained at "0 ".

On the other hand, a typical DVD player is equipped with one pick-up loader on one MPEG PCB (Printed Circuit Board). This is because the tuning time of the front-end part of the driving program takes a long time depending on the pickup.

However, as a result of the sudden drop in the price of the player in recent years, there is a great need for multi-pickup of pickups, that is, alternately applying different kinds of pickups to one MPEG PCB.

It is a technological problem to be overcome because it is expected that the pick up will lead to multimodalization of the company, further reduction of the price of finished products, and rapid response to product discontinuance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a method and apparatus for multi-pick up by allowing a back-end program in one MPEG IC as a common module and selecting a part for recognizing the type of pickup and a tuned front- Which is capable of using each optimization module for each of a plurality of types of pickups.

According to an aspect of the present invention, there is provided an optical disk reproducing apparatus for detecting connection of at least one optical pickup unit, comprising: a multi-pickup unit for connecting arbitrary optical pickup units with the same pin array structure; A first memory unit for storing firmware of the same number of front-end module information and a single back-end common module information as the optical pickup unit, and a controller for temporarily storing a plurality of operation data 2 memory section and data reproduced from an arbitrary optical disc are processed to perform A / V reproduction processing, the firmware from the first memory section is loaded in a reset state to form a front-end program area, A front-end program module corresponding to the detected voltage level by detecting the voltage level from the pin of the pick-up section It provides an optical pick-up multi-reader of the disc reproduction apparatus including a circuit section for de MPEG.

According to another embodiment for achieving the object of the present invention, there is provided an optical pickup device comprising: a multi-pickup unit for connecting arbitrary optical pickup units with the same pin array structure; There is provided a pickup recognition method of an optical disk reproduction apparatus which includes a first memory unit for storing firmware composed of common module information and a second memory unit for temporarily storing a plurality of operation data and detecting connection of at least one optical pickup unit , Loading the front-end module information from the first memory unit to the second memory unit when the power of the optical disk reproducing apparatus is turned on, detecting a voltage level from a pickup detection pin of the multi-pickup unit Corresponding to the detected voltage level among the front-end module information moved to the second memory unit It provides a multi pickup recognition method for an optical disk reproducing apparatus comprising a loading module of the program-and-coherent.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description, in order to apply the multi-pickup according to the present embodiment, a recognition circuit or an MPEG IC pin must be provided so that the pickup can be distinguished on the MPEG PCB, and it is possible to cope with it by software.

In the present invention, a front-end program corresponding to each pickup is subdivided in a state in which a recognition pin for pick-up is provided, and a method of operating on a single firmware is presented. That is, in order to multiplex the pickup, the interface between the pick-up and the MPEG PCB must be the same, and the pick-up of the optical disc reproducing apparatus that is currently released has a structure in which the pitch and pin arrangement of the pins are the same, to be. In addition, pins other than the pins required for real disk recognition and reproduction are provided with a pin capable of outputting a voltage by the user.

In this embodiment, a multi-pickup unit capable of accommodating various types of pickups and a recognition pin capable of connecting between one MPEG IC are provided. A voltage level capable of distinguishing the type of pickup from the recognition pin is output .

FIG. 2 is a block diagram of a multi-pickup recognition apparatus of the optical disc reproducing apparatus according to the present invention. The multi-pick up recognition apparatus 200 includes a motor driver 202, an MPEG IC 204, a first memory 206, 2 < / RTI >

The multi-pickup unit 200 recognizes and reproduces the optical disc 10. The term " multi-pick-up unit 200 " in the present embodiment means that various types of optical pickups released by at least one manufacturer are selectively received, and the concept of being able to simultaneously connect various types of optical pickups .

The motor driving unit 202 drives the motor M that is involved in recognition and reproduction of the optical disc 20. A sled motor for moving the multi-pick-up unit 200, a spindle motor for rotating the optical disc 20, and the like, and drives a sled motor or the like in accordance with a control signal of the MPEG IC 204 And performs tracking of the optical disc 20.

The MPEG IC 204 processes the RF data reproduced from the optical disc 20 from the multi-pickup unit 200 to perform A / V reproduction processing. The MPEG IC 204 includes a servo control unit for controlling the multi-pickup unit 200 through the motor driving unit 202 or the like according to the state of data reproduced by the multi-pickup unit 200, And an MPEG processing unit for decoding data according to the MPEG format. However, in order to highlight the essential point of the present embodiment as described below and to avoid the description of the redundant function performed in a typical optical disk reproducing apparatus, Respectively.

As shown in FIG. 2, the MPEG IC 204 according to the present embodiment is divided into two drive firmware, a front-end program 204a and a back-end program 204b in software. The front-end program 204a is an area for collecting and recognizing the disc, and the back-end program 204b is an area related to most GUI (Graphic User Interface) that the user touches on the screen.

The program area to which the multi-pickup is applied in the present embodiment is not related to the back-end program directly touched by the user, and is closely connected with the front-end program. In other words, the back-end program 204b related to the GUI such as the key operation and the screen output does not need to be changed even when various kinds of pickups are applied. Therefore, the back-end program 204b can be configured as a common module as shown in FIG. 204b are fixed as a common module, the respective modules in the front-end program 204a are loaded, and the voltage level output from the multi-up unit 200 is recognized to selectively tune the corresponding program module do.

That is, when a voltage is output from a specific pin of the multi-pick-up unit 200, the voltage level of the pin can be detected by the MPEG IC 204. [ For example, when it is assumed that 3V is output from a specific pin of A-phase pickup and 0V is output from a pin of B-phase pickup, the MPEG IC 204 detects it as a high, low signal So that the program module can be tuned to match the pickups for each manufacturer.

On the other hand, the first memory 206 is means for storing the drive firmware of the optical disc reproducing apparatus, for example, a flash ROM can be applied. In this embodiment, the respective module information of the front-end program 204a and the common module information of the back-end program 204b are stored in the first memory 206 as described above.

Also, the second memory 208 is means for temporarily storing various operation data when the optical disc reproducing apparatus is driven, for example, an SDRAM can be applied.

Hereinafter, the multi-pickup recognition process of the optical disc reproducing apparatus according to the present invention will be described in detail with reference to the flowchart of FIG. 3 attached herewith.

3, in step S300, the MPEG IC 204 determines whether the optical disk reproducing apparatus is powered on. When the power of the optical disk reproducing apparatus is turned on, the MPEG IC 204 performs step S302 ) And proceeds to step S304.

In step S302 and step S304, the MPEG IC 204 is switched to the reset state and loads the firmware, i.e., a plurality of front-end module information, from the first memory 206 and moves to the second memory 208 .

Thereafter, in step S306, the MPEG IC 204 checks the voltage level from the pickup detection pin of the multi-pick up unit 200. [

As a result of the check in step S306, if the detected voltage level is high, the MPEG IC 204 proceeds to step S310, and if it is low, the MPEG IC 204 proceeds to step S312.

In step S310, the MPEG IC 204 loads module # 1 of the front-end program among the front-end module information.

In step S312, the MPEG IC 204 loads module # 2 of the front-end program among the front-end module information.

The high-level signal of the voltage level at this time is a detection signal for distinguishing between the two types of pickups, and is not limited to only the embodiment, and does not characterize the present invention. For example, when the voltage level of a specific pin is divided into at least three or more, that is, when it is necessary to distinguish three or more kinds of pickups by manufacturer, the detection level of the MPEG IC 204 can be diversified to cope with it. The facts will become more apparent from the claims that follow.

In step S316, the MPEG IC 204 branches to the loaded module to perform the disc discrimination operation.

As described above, according to the present invention, a back-end program in one MPEG IC is used as a common module, and a part for recognizing the type of pickup and a tuned front-end program can be selected.

INDUSTRIAL APPLICABILITY According to the present invention, by allowing a back-end program in one MPEG IC as a common module and selecting a part for recognizing the type of pickup and a tuned front-end program, each optimization module corresponding to the multi- It can be used for many types of pickups, leading to the multi-vendor multi-pickup of pickups, which further induces price reduction of finished products and enables quick response to product discontinuance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but various changes and modifications may be made within the scope and spirit of the following claims.

Claims (8)

An optical disk reproducing apparatus for detecting connection of at least one optical pickup unit, A multi-pick-up section for connecting any optical pickup section with the same pin array structure, A first memory unit for storing firmware of the same number of front-end module information and a single back-end common module information as the optical pickup unit, A second memory unit for temporarily storing a plurality of operation data when the optical disk reproducing apparatus is driven, A / V reproduction processing is performed on data reproduced from an arbitrary optical disc, a firmware is loaded from the first memory unit in a reset state to form a front-end program area, and a voltage An MPEG circuit part for detecting a level and loading a module of one front-end program corresponding to the detected voltage level Pickup device of the optical disc reproducing apparatus. The method according to claim 1, And the MPEG circuit unit loads the front-end module information recorded in the first memory unit in the reset state and moves the loaded front-end module information to the second memory unit 3. The method of claim 2, Wherein the MPEG circuit unit loads the first module of the front-end program moved to the second memory unit when the voltage level detected from the pin of the multi-pick-up unit is high, and when the voltage level detected from the pin of the multi- And program loading means for loading the second module of the front-end program moved to the second memory unit. The method according to claim 1, Wherein the front-end program area is a variable area involved in recognition and reproduction of an optical disc, and the back-end program area is a fixed area related to a user interface. The method according to claim 1, Wherein the first memory is a flash ROM. The method according to claim 1, Wherein the second memory is an SDRAM. A first memory unit for storing firmware including the same number of front-end module information and a single back-end common module information as the optical pickup unit, And a second memory unit for temporarily storing a plurality of pieces of operation data, the pickup recognition method of an optical disk reproduction apparatus detecting connection of at least one kind of optical pickup unit, Loading the front-end module information from the first memory unit to the second memory unit when the power of the optical disk reproducing apparatus is turned on, Detecting a voltage level from a pickup detection pin of the multi-pick-up unit; And loading a module of a front-end program corresponding to the detected voltage level of the front-end module information moved to the second memory unit And a multi-pick-up recognition method of the optical disc reproducing apparatus. 8. The method of claim 7, The loading step may include: If the voltage level detected from the pickup detection pin of the multi-pick-up section is high, loading the module of the first front-end program among the front-end module information, If the voltage level detected from the pickup detection pin of the multi-pick-up unit is low, a step of loading the module of the second front-end program of the front-end module information And a multi-pick-up recognition method of the optical disc reproducing apparatus.

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