KR100578172B1 - Defect management method in dvd player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defect management method in a DVD player, comprising: a first step of performing error correction on disc data when a DVD disc is reproduced, and a disc defect that cannot be corrected when the error correction of the first step is impossible; A second step of performing error correction on the area of the ID of which ID is increased in the current area where the ID has occurred, and storing the ID of the area where error correction is possible if the error correction is correctly performed in the second step. And a fourth step of issuing a corresponding skip command to skip from the disk defective area where error correction is impossible through the ID stored in the third step to an error correctable area having the ID. Therefore, there is an effect that it is possible to solve the problem that the user may regard as boring of the screen early and to play it back, and to manage the defects of the disk more efficiently in this way.

Description

DEFECT MANAGEMENT METHOD IN DVD PLAYER

1 is a block diagram for performing a defect management method in a DVD player according to the present invention,

2 is a detailed flowchart illustrating a defect management method in the DVD player according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: pickup and actuator unit 20: RF signal amplification and servo signal processing unit

30: motor drive unit 40: key input unit

50: microcomputer 60: digital signal processing unit

70: MPEG decoder 80: audio signal processing unit

90: video signal processing unit 100: speaker

110: screen

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defect management method in a digital video disk (DVD) player. In particular, when a disk defect in a large area where error correction is impossible when playing a disc through a DVD player occurs, the situation is real time. The present invention relates to a defect management method in a DVD player which can determine an efficient skip position of a defect by actively dealing with a defect management in a servo that can be determined and transmitting the same to a host.

In general, in the case of playing a disc through a DVD player, if there is a defect in which a specific part of the disc gets dirty or the disc is damaged, the data cannot be read properly in the corresponding area, and the state of the servo becomes unstable.

At this time, the host in the DVD player, i.e., the microcomputer, takes a passive position such as giving a few retry playback commands and a skip command to the next address area.

In other words, if a DVD player encounters a defect in a large area where error correction is impossible, it tries to read the data in that area repeatedly for a long time, and if it still fails to read after a certain time, the skip command from the microcomputer to the next data area is executed. It will come down.

On the other hand, when skipping to the corresponding data area of the next address as described above, if there are other defects in succession, the above-described processing is repeated, and thus passive processing of defect management of a certain form by such microcomputer Because of this, the screen freezes for a long time. That is, many users have a problem in that they feel boredom and discomfort such as screen disconnection.

 Accordingly, the present invention has been made to solve the above-described problems, and its object is to provide a servo capable of identifying a defective area in real time when a large area of a disc defect occurs that cannot be corrected when playing a disc through a DVD player. In the DVD player, it is possible to minimize the time delay for freezing during disc playback by actively transmitting information to the microcomputer to determine the location of a defect that cannot be corrected by error. To provide a defect management method.

The defect management method in the DVD player according to the present invention for achieving the above object is the first step of performing error correction on the disc data during the playback of the DVD disc, and if the error correction of the first step is impossible, The second step of performing an error correction on the area of the increased ID by increasing the ID in the current area where a disk defect that cannot be corrected, and if the error correction in the second step is performed correctly, the error correction is performed. A third step of storing an ID of a possible region, and a fourth step of issuing a corresponding skip command to skip from a disk defective area in which error correction is impossible through the ID stored in the third step to an error correctable area having an ID; It is characterized by.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram for performing a defect management method in a DVD player according to the present invention, which performs optical pickup from a disc loaded in a disc tray (not shown) to read data recorded on the disc as an RF signal. Amplifies the pick-up and actuator unit 10 to be output and the RF signal output from the pick-up and actuator unit 10, and outputs a servo control signal according to the signal to the motor driver 30 to be described later to focus servo and tracking. An RF signal amplification and servo signal processing unit 20 for performing a servo, a motor driving unit 30 for driving the spindle motor (not shown) to rotate the disk, and driving the actuator unit so that the pickup unit performs optical pickup; A key input unit 40 for inputting various key signals for reproducing the music, a microcomputer 50 for controlling the operation of each block configuration for reproducing the disc, and an RF signal The digital signal processor 60 performs digital signal processing on the RF signal amplified by the amplification and servo signal processing unit 20 and performs error detection and error correction, and the digital video signal and audio signal processed by the digital signal processing unit 60. MPEG decoder 70 for decoding a signal by MPEG compression format, audio signal processor 80 for voice processing audio signal decoded in MPEG decoder 70 and outputting through speaker 100, and MPEG decoder 70 The video signal processor 90 is configured to process the video signal decoded by the video signal and output the same through the screen 110.

The pickup and actuator unit 10 is a servo of the DVD player, and can determine in real time a disk defect in a large area where error correction is impossible.

When the microcomputer 50 generates a defect in an area that cannot be corrected even after repeating several disc retry attempts, the microcomputer 50 searches the pick-up and actuator unit 10 to the area where the error can be corrected, that is, the address of the area. Save and send ID.

Subsequently, the microcomputer 50 skips the corresponding defective area through the transmitted ID, and immediately sends a command to the pick-up and actuator unit 10 to skip to the next normal area, that is, an error correctable area corresponding to the ID. send.

With reference to the flowchart of FIG. 2, a defect management method in a DVD player according to an embodiment of the present invention will be described in more detail based on the above-described configuration.

First, when the disc is played back in the DVD player (step 201), the motor driving unit 30 operates under the control of the microcomputer 50 to rotate the disc loaded in the disc tray, and thus the pickup and actuator unit 10 is rotated. The optical pickup is performed to read the data recorded on the disk and output the RF signal to the RF signal amplification and servo signal processing unit 20 as an RF signal.

At this time, the pickup and actuator unit 10 which performs the servo function may check the data status of the disk in real time, and thus may determine a defective area of the disk which cannot be corrected.

The pickup and actuator unit 10 having the above-described characteristics operates under the control of the microcomputer 50, and performs ECC error correction on the disc data based on real-time situation determination (step 202).

If the error correction of the step 202 is made correctly (step 203), the retry for error correction is minimized (step 204), while if the error correction is not made, the retry for error correction is repeated (step 203). 205).

Thereafter, if the number of retry repetitions is greater than or equal to a predetermined reference number n (step 206), the microcomputer 50 sets an emergency flag to set an emergency situation in which a disk defective area cannot be corrected as an emergency. (Step 208), if not abnormal, continue to search the area (step 207) to perform ECC error correction through step 202 and beyond.

When the emergency situation is set as in step 208, the pickup and actuator unit 10 searches for an area in which ECC error correction is possible under the control of the microcomputer 50.

That is, error correction is performed on the area of the increased ID by increasing the corresponding address, i.e., ID, in the current area in which the disk defect that ECC error correction is impossible has occurred (step 209).

If the error correction is correctly performed in step 209 (step 210), the increased ID, that is, the ID of the area capable of error correction, is stored and transmitted to the microcomputer 50 (step 211), and error correction is impossible. If it is determined that this area is also an area where error correction is impossible, the process proceeds to step 209 to increase the ID and then perform error correction on the corresponding area of the increased ID.

Thereafter, the microcomputer 50 accurately recognizes a region in which error correction is impossible through the ID transmitted in the step 211, that is, a defective area of the disk, and skips the error to skip the error corrected area having the ID. Give an order and cancel the emergency at the same time (step 212).

Accordingly, the disc can be played normally without interruption of the screen.

As described above, in the present invention, the servo which can identify the defect area in real time actively measures the size of the defect that cannot be corrected, and transmits it to the microcomputer to directly issue the skip command from the microcomputer to the next address. To ensure that

As described above, in the present invention, when a defect having a large influence on the playback performance occurs among many DVD titles on the market, the present invention is freed from manual processing called defect management of a certain format by a microcomputer in a DVD player. By actively processing through the servo which can determine the defects, the user can solve the problems that may be tedious, such as screen freezing, so that playback can be performed early, and the defect management of the disk can be managed more efficiently. It is effective to be.

Claims (3)

In a DVD player that performs DVD disc playback, A first step of performing error correction on the disc data when the DVD disc is reproduced; A second step of performing error correction on an area of an increased ID by increasing an ID in a current area in which the disk defect that cannot be corrected in an error occurs when the error correction of the first step is impossible; A third step of storing an ID of an area capable of error correction if the error correction is correctly performed in the second step; A fourth step of giving a corresponding skip command to skip from a disk defective area in which error correction is impossible through the stored ID to an error correctable area having the ID in the third step; Defect management method of the digital video disc player comprising a. The method of claim 1, The second step, If error correction of the first step is impossible, steps 2-1 of repeating a retry for error correction; If the retry repetition number of steps 2-1 is greater than or equal to a predetermined reference number n, step 2-2 of setting a current situation as an emergency situation and continuously searching for a corresponding area to perform error correction if the error is not abnormal; Wow, If an emergency is set in step 2-2, step 2-3 of searching for an area where error correction is possible while increasing ID through a pickup and actuator unit; Performing error correction on the area of the increased ID searched in step 2-3; The defect management method of the digital video disc player further comprising. The method according to claim 1 or 2, And said fourth step comprises the step of canceling the emergency situation.

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