KR19980039986A - Disc Detachment Method of Optical Disc Changer System - Google Patents

Abstract

The present invention relates to a disc deviation detection method of an optical disc changer system. (A) When a disc tray is closed after a disc tray is opened and a predetermined number of discs are loaded, the discs are loaded sequentially and the discs are loaded. Reading and storing a disk number and a table of contents (TOC) data corresponding to a unique number of the disk loading unit, and waiting for a key input; (B) if the power is turned off and then powered back on, displaying each disk number and corresponding TOC data stored in step (a) on the screen; (C) If the disc presence detection signal provided from the sensor unit of each disc mounting unit is compared with the previously stored disc number and TOC data, and if they do not coincide with each other, it is recognized that the disc mounted in the disc mounting unit that does not match is removed from the disc mounting unit. And display it, and detect and display when the power is turned off and the set is removed or the disk is detached from the disk loading part due to an external strong impact, etc. By doing so, the user can take appropriate measures to prevent malfunction or damage to the disk.

Description

Disc Detachment Method of Optical Disc Changer System

The present invention relates to a disc presence detection method of an optical disc changer system, and more particularly, an optical disc changer that detects when a disc is dismounted from a mounting position due to a movement of the set after mounting the disc or an impact applied to the set. The present invention relates to a method for detecting disk deviation of a system.

With the development of audio and video media, optical disc players for recording and reproducing video and audio data on semi-permanent optical discs have been developed.

Such an optical disc player reproduces an image and / or audio recorded on an optical disc and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality and / or Or it can reproduce the signal with sound quality, it does not generate noise due to irregular reproduction and modulation, very low distortion, no ghost and random access, so it is rapidly developed and widely distributed. There is a trend.

In addition, such an optical disk player includes a compact disk player (CDP), a laser disk player (LDP), a compact disk graphic player (CDGP), and a video compact disk player (VCDP: video compact disk player) has been developed and widely used. Also, recently, a digital video disk (DVD) using MPEG-2 moving picture compression technology and a digital video disk player for playing the same have been developed. It can record and play back gigabytes (GB) of data including moving images on a 12cm optical disc such as a CD, and it is also designed to be compatible to play current CDs and VCDs.

In addition, as the performance and functions of such an optical disc player develop, various kinds of data recorded on the optical disc are diversified. In the case of a large amount of data such as a movie, the data corresponding to one movie is recorded on one disc. In some cases, it was impossible to record all of them. Also, as the inconvenience caused by replacing and loading the disc with a desired disc every time a use occurred, an optical disc changer system was developed to solve such inconveniences. The optical disc changer system may mount a plurality of discs in one disc tray, and then selectively play a desired disc sequentially or as needed.

As described above, the optical disc changer system is provided with a disc tray made for mounting a plurality of discs, in which a plurality of discs can be mounted in each disc mounting portion.

However, as described above in the optical disk changer system, when a plurality of disks are mounted in the disk tray, the power is turned off and the set is moved, or when the power is turned off due to an external strong shock or the like, the disk is detached from the disk mounting part. In this case, since it is conventionally determined that the disk is not mounted, it may cause a malfunction if a user executes a predetermined function without the user's recognition of the disk afterwards, or when the disk tray is opened. May be damaged.

That is, FIG. 1 is a perspective view schematically showing the disc tray of the optical disc changer system, and as shown in FIG. 1, mounted on the disc mounting portion 5 installed on the upper surface of the turn table 1 for changing the position of the disc. When the disc is separated from the disc mounting unit 5, the disc may not be loaded properly and may cause a malfunction. Also, when the disc is not recognized, the disc may be damaged when the disc tray is opened.

Accordingly, the present invention has been made to solve such a problem in the prior art, an object of the present invention is to turn off the power and move the set or the external shock, such as a predetermined number of disks mounted on the disk tray of the optical disk changer system Therefore, the present invention provides a disc deviation detection method of an optical disc changer system that detects when the mounting position is separated and is recognized by the user.

According to a preferred embodiment of the present invention for achieving this object, when a predetermined number of disks mounted on the disk mounting portion of the disk tray of the optical disk changer system are separated from the disk mounting portion, the predetermined surface of the upper surface of each disk mounting portion is removed. In the method for detecting and displaying it through the sensor unit for detecting the presence or absence of the disk mounted in the position, (A) when the disk tray is closed after the disk tray is opened and a predetermined number of disks are mounted, Loading the disks sequentially and reading and storing the disk number and TOC (table of contents) data corresponding to the unique numbers of the disk mounting portion in which the disk is mounted, and waiting for key input, and Each time stored in step (a) if it is turned off and then powered back on. Displaying the disk number of the disk and the corresponding TOC data on the screen; and (d) comparing the disk presence detection signal provided from the sensor unit of each disk mounting unit with the previously stored disk number and TOC data, and not matching each other. If not, recognizing and displaying that the disc mounted in the disc mounting portion that does not match is detached from the disc mounting portion.

1 is a schematic perspective view of a disc tray constituting an optical disc changer system;

2 is a schematic block diagram of an optical disc changer system for practicing the present invention;

3A and 3B are detailed flowcharts showing a disc deviation detection method of an optical disc changer system according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: Pick-up and actuator unit 20: RF signal amplification and servo signal processing unit

30: motor drive unit 40: key input unit

50: microcomputer 55: auxiliary power supply

57: sensor unit 60: digital signal processing unit

70: MPEG decoder 80: Audio signal processor

85: speaker 90: video signal processing unit

95: screen

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

2 is a schematic block diagram of an optical disc changer system for practicing the present invention.

As shown in FIG. 2, the optical disc changer system for implementing the present invention includes a pickup and actuator unit 10, an RF (radio frequency) signal amplification and servo signal processing unit 20, a motor driver 30, and a key input unit ( 40, microcomputer 50, digital signal processor 60, auxiliary power supply 55, MPEG decoder 70, audio signal processor 80, video signal processor 90, speaker 85, screen 95 It includes.

The pickup and actuator unit 10 performs an optical pickup from the disc loaded in the disc tray 100 and outputs an RF signal read out accordingly.

In addition, the motor driving unit 30 drives the spindle motor (not shown) to rotate the disk and drives the actuator unit 10 so that the pickup unit 10 performs optical pickup to read data recorded on the disk. Output as an RF signal.

The RF signal amplification and servo signal processing unit 20 amplifies an RF signal provided from the pickup and actuator unit 10 and provides a servo control signal according to the signal to the motor driving unit so that the focus servo and the tracking servo are performed.

The digital signal processing unit 60 digitally processes the amplified RF signal provided from the RF signal amplification and servo signal processing unit 20, performs error detection and error correction, and outputs the result to the MPEG decoder 70.

The MPEG decoder 70 decodes an error corrected digital video signal and an audio signal provided from the digital signal processor 60 based on the MPEG compression format and outputs the decoded video signal to the video signal processor 90 and the audio signal processor 80. .

The audio signal processing unit 80 and the video signal processing unit 90 process the decoded audio and video signals provided from the MPEG decoder 70 and output them to the speaker 85 and the screen 95, respectively, and accordingly the speaker 85 And the screen 95 are respectively transmitted and displayed as audio.

On the other hand, the auxiliary power supply unit 55 is for supplying power to the microcomputer 50 when the power input to the optical disk changer is turned off so that the microcomputer 50 can be driven even when the power is off, the rechargeable battery or A general internal battery can be used.

On the other hand, in the disc tray 100 on which the disc is mounted, a sensor unit 57 for detecting the presence or absence of the disc is mounted at a predetermined position. In addition, the sensor 57 for detecting the presence or absence of the disk may be a contact switch mounted at a predetermined position on the upper surface of the disk tray 100 and turned on or off depending on whether the disk is mounted. The sensor 57 may include a light emitting part and a light receiving part. In addition, the light emitting unit may be an optical detection sensor that detects the presence or absence of the disk by receiving the light reflected from the light receiving unit on the disk surface, the output terminal of such a sensor unit 57, the predetermined one input of the microcomputer 50 It is connected to the port to provide a high or low disk presence detection signal to the microcomputer 50, the sensor unit 57 according to the present invention, the disk mounting portion 5 to the disk Is mounted and mounted at a predetermined position so as to generate a 'low' signal indicating that the disc is not present even when is not mounted and even when the disc is displaced from the correct position of the disc mounting portion 5.

On the other hand, according to the present invention, a predetermined number of disks within a range that can be mounted in the disk mounting portion 5 of the disk tray 100 is mounted so that the number of each disk (substantially the number and TOC data of the disk mounting portion 5 is stored inside). When the power supply from the outside is cut off or stored in the memory (not shown) or the power-off key signal is input through the key input unit 40 and the power is turned off, the microcomputer 50 is connected to the auxiliary power supply 55. It is powered by the power source and maintains previously stored data and unique functions.

Then, when the power is applied again, that is, when the power is turned on, the microcomputer 50 provides the video signal processor 90 with the TOC data, the respective disc number, and the control signal for each of the previously stored discs. In operation 90, data provided according to the control signal of the microcomputer 50 is displayed on a screen by OSD (On Screen Display) processing, and the screen 95 displays the data. As a result, at this time, the disk number and TOC data for the disk stored before the power-off, substantially all the disks mounted in the disk mounting portion 5, are displayed.

On the other hand, after that, the microcomputer 50 compares the disk presence signal of 'high' or 'low' provided from each sensor unit 55 mounted on the disk mounting unit 5 with the previously stored disk number and TOC data. At this time, if a 'low' signal indicating that there is no disk is provided from the sensor unit 57 of the disk mounting unit 5 in which the disk with the disk number and TOC data is stored, the microcomputer 50 may attach the disk mounting unit 5. Recognizing that the disc of the disc is off from the correct position, and provides the data and control signal for this to the video signal processing unit 90, accordingly, the video signal processing unit 90 is OSD processing data indicating the disc departure provided from the microcomputer 50 To the screen 95. Then, the screen 95 displays the output signal of the video signal processing unit 90 as a letter to inform that the predetermined disk has been detached from the disk loading unit 5.

3A and 3B are flowcharts of a disk deviation detection method of an optical disk changer system according to a preferred embodiment of the present invention.

If the disc tray 100 is opened in step S10, a predetermined number of discs are mounted in the disc loading unit 5 in step S12, and the disc tray is closed, then each disc mounted in step S14. Are loaded sequentially to read and store the disk number and TOC (table of contents) data corresponding to the unique number of the disk mounting portion 5 on which the disk is mounted.

Thereafter, in step S16, it is determined whether the reading and storing of the disk number and TOC data for each disk is completed. If the reading and storing of the disk number and TOC data for each disk is completed, the flow advances to step S18. Wait for key input.

Thereafter, when the power-off key signal is input in step S20, in step S22, power from the auxiliary power supply unit 55, i.e., the internal battery, is supplied to the microcomputer 50 to maintain storage of previously stored data. After that, turn off the power supply.

After the above-described process, when the power-on key signal is input in step S24, the power is turned on in step S26, and then, in step S28, each disk number and each disk stored in step S14 correspond. TOC data is displayed on the screen 95.

Then, in step S30, the microcomputer 50 determines the presence or absence of the disk according to each disk presence detection signal provided from the sensor unit 57, and in step S32 detects the presence or absence of the disk provided from the sensor unit 57 The disk presence data determined according to the signal is compared with the previously stored disk number and TOC data. If the previously stored disk number and the disk presence data determined by the sensor unit 57 are matched, the process proceeds to step S34 and does not match. If not, the flow proceeds to step S36.

First, proceeding from step S32 to step S34, in step S34 awaits key input, after which the flow is returned.

In addition, when the process proceeds from step S32 to step S36, in step S36, for the disc in which the previously stored disc number and the disc presence data determined by the sensor unit 57 do not match, the disc is the disc loading unit ( It is displayed via screen 95 that it has exited 5), after which the flow is returned.

As described above, the present invention provides a user by detecting and displaying when the power is turned off and the set is moved while the disk is mounted or when the power is turned off due to an external strong impact or the like, and the disk is detached from the disk loading unit. By taking appropriate measures to prevent malfunctions or damage to the disk, there is an effect.

Claims (1)

When a predetermined number of disks mounted on the disk mounting portion of the disk tray of the optical disk changer system are separated from the disk mounting portion, the disk unit detects the presence or absence of the disk mounted at a predetermined position on the upper surface of each disk mounting portion. In the method for displaying, (A) If the disc tray is closed after the disc tray is opened and a predetermined number of discs are loaded, the disc number corresponding to the unique number of the disc mounting unit on which the disc is mounted is loaded by sequentially loading each mounted disc. And reading and storing TOC (table of contents) data, and waiting for key input. (B) when the power is turned off and then turned on again, displaying each disk number and corresponding TOC data stored in the step (a) on the screen; (C) If the disc presence detection signal provided from the sensor unit of each disc mounting unit is compared with the previously stored disc numbers and TOC data, and the discs are not matched with each other, the discs mounted in the disc mounting unit that do not match are removed from the disc mounting unit. Disc detecting the deviation of the optical disk changer system comprising the step of detecting.