KR960003704B1 - High driving apparatus and method for disk player - Google Patents

Abstract

The device includes of a pick-up unit which reads data from a spinning disc, a RF amplifying unit which amplifies the read data, a FM demodulating unit which demodulates the amplified data, a phase synchronization control unit which generates clocks, a time axis correcting unit which is for the time axis correction of data, a video amplifying unit which outputs video output data by amplifying video signals, a high speed starting mode switch which is to set to high speed mode, a level detecting unit which detects the average level of the corrected data, and a control unit which controls the transmission of the detected data to the program part of the pick-up unit.

Description

High Speed Starter of Disc Playback System and Its Method

1 is a block diagram illustrating a high speed start device of a disc reproducing system according to the present invention.

FIG. 2 is a circuit diagram for explaining the configuration of the level detection circuit shown in FIG.

3 is a flowchart for explaining a high speed start method executed by the high speed start device of the disc reproducing system according to the present invention.

* Explanation of symbols for main parts of the drawings

10: spindle motor 12: spindle motor drive unit

14: pickup device 16: RF amplifier

18: FM demodulation unit 20: phase synchronization control unit

22: time-base government 24: video amplifier

26: high speed start mode switch 28: level detector

30 control unit 31 amplifier

32: filter element 33: signal output element

The present invention relates to a high speed start device and a method of a disc reproducing system, and more particularly, to a disc reproducing system assuming a high speed start mode, a disc information recording area and a program (movie data or video) of a disc. Flexible data) The present invention relates to a high speed starting device of a disc reproducing system and a method for detecting a target track at a high speed when detecting a level of a recording area to confirm a disc information recording area.

At present, a system for reproducing a disk, which is noted as an information recording medium capable of large-capacity information recording, includes a spindle servometer including a spindle motor that is responsible for constant rotation of the disk and a spindle motor driving device that drives the spindle motor. And a pickup device for optically reading out video signals and / or audio signals recorded on the disc, and a pickup device drive system for position control of the pickup device.

Recently introduced discs include a disc information recording area (i.e., a TOC (Table of Content) area) in which disc information necessary for accessing the disc is recorded, and a program (in the case of a laser disc, a video signal for a movie or a video song). And audio signal, in case of compact disc, high quality audio signal) area.

Typically, the control signal recorded on the disc using the light beam from the pickup device in the state in which the spindle motor controlling the constant speed rotation of the disc rotates at a constant speed (approximately 1800 rpm) at the time of starting for accessing the disc in the disc reproducing system. In other words, after reading the 24-bit BPC (Biphase code, Q-code) to confirm the normal playback condition setting, access to the TOC area or the program area is made. The movement of the pickup device at start is the first chapter read from the TOC area (set to '0' or '1') if the chapter is divided into chapters at the current track position on the disc while the TOC area is read. In general, many tracks form a single chapter on a disc, so searching for that chapter takes a short time. The time difference between the position and the start position of the chapter is converted to the number of tracks to find the start position of the chapter.However, if it is not divided into chapters, the absolute time between the current pickup position and the target position (first track) The difference is converted to the number of tracks to find the target position.

On the other hand, if the TOC area is not read to shorten the startup time, information on the start position of the first chapter (set to 0 or 1) is not taken. For example, in case of an image flexible disc, the song number, time or frame information The track jump of the pick-up device is performed on the basis of the bay to check the target position on the disc. Therefore, when the readout of the TOC area on the disk is not performed, although the overall starting time is slightly shorter than that of the reading of the TOC area, the movement time to the target track is increased.

Accordingly, the present invention has been made in view of the above-described prior art, and symbolizes the high speed start mode when the disc reproducing system is started, and the disc information recording area (lead-in area or TOC) based on the image data on the disc in the high speed start mode. Area) and the signal level of the image data detected from the program area, and when identified as the disc information recording area, the pickup apparatus moves to the program area immediately so that the target position (first track) can be searched. The object is to provide a starting device and a method thereof.

In order to achieve the above object, according to a preferred aspect of the present invention, the spindle servometer is operated by using a spindle servometer and an optical beam for rotating the disc at constant speed with a disc information recording area and a program area containing video and / or audio data. Pick-up device for reading data from a disk rotated by the drive, RF amplifier for amplifying data read by the pickup device, FM demodulator for FM demodulating data amplified by this RF amplifier, phase at start-up for disk access A phase synchronization controller for performing a synchronous action, a time axis correction for performing time axis correction of the read data using the phase synchronized clock, and a video amplifier for amplifying the video signal read out from the disc and outputting screen output data. In the configured disc playback system, the fast start mode for the disc is Control of movement to the program area of the pickup apparatus based on a high-speed start mode switch for determining the level, a level detector for detecting an average level of image data corrected by the time axis correction unit, and an average level of data detected by the level detector. There is provided a high speed starting device of a disc reproducing system having a control means.

Preferably, the level detection unit is switched in accordance with an amplifier for amplifying the time-axis-corrected data, a filter element for obtaining an average value by filtering the signal amplified by the amplifier, and a level of the average value output from the filter element, thereby disc information of the disk. And a signal output element for generating a signal representing a recording area and a program area.

Further, according to the present invention, if the current position of the pickup device is determined to be the disc information recording area according to the average value of the data read out from the disc detected by the level detecting unit when the high speed start mode is set, the control unit is configured to pick up the pickup device. Control to move to the program area immediately. That is, if the current position of the pickup apparatus at the start is determined to be the program region, the pickup apparatus is moved in the inner circumferential direction of the disk until the signal of the disk information recording region is detected, and it is determined that the pickup apparatus is the disk information recording region during the movement of the pickup apparatus. The pick-up device is moved in the circumferential direction with the disc to enter the program area so that the data can be reproduced. If the current position of the pickup device is a disc information recording area, the control unit moves the pickup device in the outer circumferential direction of the disc until the program area is confirmed, and immediately starts reproducing data when the program area is confirmed.

According to another aspect of the present invention, when a disc having a disc information recording area and a program area containing video and / or audio data is rotated at a constant speed by a spindle servo meter, data is read from the disc using an optical beam from a pickup device. And amplify the data read by the pickup device, and FM demodulate the amplified data, and generate phase synchronization clocks by the phase synchronization control means on the demodulated data to correct the time axis by the phase synchronized clock. A disc reproducing system for amplifying a video signal and outputting screen output data, wherein the disc information recording area and the program recording area of the disc are read out from the disc by the level detecting means in the high-speed start mode for the disc, and time-calibrated. Detecting the average level of the data; Controlling movement to the program area of the pickup apparatus by a control means based on the average level of the disc information recording area and the program recording area of the disc detected by the level detecting unit. A method is provided.

Preferably, the level detecting step by the level detecting means includes amplifying the data read out from the disc and time-calibrated, obtaining the average value of the data by filtering the amplified signal, and the level of the average value. And generating a signal indicative of the disc information recording area and the program area of the disc.

Further, according to the present invention, if the current position of the pickup device is determined as the disc information recording area according to the average value of the data read out from the disc detected by the level detecting unit in the fast start mode for the disc, the pick-up device Control to move to the program area immediately.

According to the high speed starting device and the method of the disc reproducing system according to the present invention configured as described above, if the position of the current pick-up device is determined as the disc information recording area by level detecting data read from the disc, the pick-up device is immediately transferred to the program area. If the current position is the program area, the pickup device is moved to the position where the disc information recording area is checked. If the disc information recording area is confirmed, the pickup device is immediately moved to the program area to the target position (first track). By performing the search, it is possible to access the target track of the disc without checking the disc information read out by the pick-up device or time delay for securing the constant speed of the spindle servo system.

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

1 is a block diagram showing a configuration of a high speed starter of a disc reproducing system according to the present invention, wherein 10 and 12 are fixed to a disc D having a disc information recording area and a program area containing video and / or audio data. A spindle motor and a spindle motor control unit constituting a rotating spindle servo system, 14 denotes a pickup device for reading data from a disk D rotated by the spindle servo system using an optical beam, and 16 a pickup An RF amplifier for amplifying the data read by the device 14 is shown.

18 shows an FM demodulator for FM demodulating the data amplified by the RF amplifier 16, and 20 shows a clock by performing a phase synchronization operation to correct data read from the disk D. As the generated phase synchronization control section, for example, a phase synchronization loop (PLL) system is employed. 22 denotes a time axis correction unit for performing time axis correction on the data by using the phase synchronized clock in the phase synchronization control unit 20, and 24 denotes amplified video signals read from the disc D to output screen output data. A video amplifier is shown.

In addition, 26 denotes a high speed start mode switch for instructing a high speed start to the disc D, for example, installed on a front control panel (not shown) of the disc reproducing system, and 28 denotes a time axis correcting unit 22. And a level detecting unit for detecting the average level of the calibrated data, and 30 denotes the high-speed start mode switch while controlling the overall operation of the disc reproducing system including the control of the spindle servo system and the control of the pickup device 14. A control unit as means for controlling the movement of the pick-up device 14 to the program area based on the average level of data detected by the level detecting unit 28 at the time of inputting the high-speed start command from the terminal 26 is shown.

Preferably, according to the present invention, the level detection unit 28 is an amplifier 31 for amplifying the data time-calibrated by the time axis corrector 22 and amplification in the amplifier 31 as shown in FIG. A filter element 32 composed of a resistor and a capacitor which filter out the averaged signal to obtain an average value, and is switched according to the level of the average value output from the filter element 32 to indicate a disc information recording area and a program area of the disc D. It consists of a signal output element 33 composed of, for example, a switching transistor for generating a signal. In this configuration, the level detector 28 properly sets the resistance and capacitance of the resistor, the capacitor, and the capacitor constituting the filter element 32 so that the video from the time axis corrected data in the time axis corrector 22 is set. An average value of tens or more lines of the signal is applied to the signal output element 34. That is, according to the filter element 32, the video signal read out from the disc information recording area on the disc D contains only a synchronization signal, a burst signal, and 24-bit BPC data, and therefore the average value thereof is almost zero. On the other hand, since the video signal read out from the program area contains the data of the moving image, the average value thereof is not detected as zero. Therefore, the signal output element 34 is in a low level output state by data relating to the disc information recording area, and a low level is applied to the controller 30, while a high level output is applied by data relating to a program area. In this state, a high level is applied to the controller 30. Therefore, the control unit 30 determines that the current position of the pickup device 14 is the disc information recording area according to the average value of the data read out from the disc D detected by the level detection unit 28. While the control for quickly moving the 14 to the program area is performed, if the current position of the pickup device 14 is determined to be the program area, the pickup device 14 is moved in the inner circumferential direction of the disc D. When the disc information recording area is confirmed, control is performed to move the pickup device 14 to the program area immediately.

Next, the operation of the high speed starting device of the disc reproducing system according to the present invention configured as described above will be described with reference to the flowchart shown in FIG.

First, in step 51, the control unit 30 performs initialization when power supply is started by a power switch (not shown). Then, in step 52, the controller 30 determines whether a high speed start command from the high speed start mode switch 26 is input. If the high-speed start command is input as a result of the determination, it is determined in step 53 whether the non-read mode is set for the disc information recording area set on the disc D. As a result, when the non-read mode for the disc information recording area is not set, the microcomputer 30 sets the non-read mode for the disc information recording area in step 54 according to the fast start command and then returns to step 53. .

On the other hand, if the high-speed start command is not input in step 52, it is determined in step 55 whether the read mode of the disc information recording area is set, and in step 56, the read mode of the disc information recording area is set, and then the process returns to step 55. To proceed with subsequent processing.

When the non-reading mode of the disc information recording area is set in step 53, the spindle motor 10 does not rotate by determining whether the spindle motor 10 is rotated by the spindle motor driving unit 12 in step 57. In this case, the spindle motor driving unit 12 is controlled in step 58 to drive the spindle motor 10.

Subsequently, the microcomputer 30 determines whether a disc search input for directly searching for a target track on the disc D is input in step 59, and sequentially plays from the beginning if the direct target track is not input. If this is not the case, proceed to step 60 to clear the mode setting, and then proceed to step 55 to proceed to the subsequent processing.

On the other hand, if the disc search input is not input in step 59, it is determined in step 61 whether the spindle motor 10 rotates at a speed of approximately 900 rpm, and if it is less than the rotation speed, the process returns to step 52 and repeats the above procedure. On the other hand, if the rotational speed of the spindle motor 10 is about 900rpm or more, the pickup device 62 is controlled in step 62 to confirm that the focusing servo for the disc D is started and that the focusing servo is made. And other servo operations such as tilting servo. The data from the disc D read out by the pickup device 14 by such tracking and tilting servo is amplified by the RF amplifier 16 and then applied to audio signal processing means (not shown) for reproduction of the audio signal. In addition, the FM demodulation unit 18 is applied to the FM demodulation unit 18. Then, the phase synchronization control unit 20 generates the phase synchronized clock for normal data reproduction. For example, the time base calibration for the run-out of the disc is performed.

The time axis corrected data in the time axis corrector 22 is applied to the level detector 28, amplified by the amplifier 31 of the level detector 28, and then filtered by the filter element 32. The disk D If the data from the data is in the disc information recording area, the output of the filter element 32 is almost zero, whereas if the data is data read from the program area, the output of the filter element 32 is zero. Therefore, the output of the signal output element 34 becomes a high level or a low level. Therefore, the control section 30 determines whether the pickup device 14 is located in the program area based on whether the output of the signal output element 33 becomes high level in step 63, and locates it in the disc information recording area. If not, the pickup device 14 is moved to the inner circumferential side of the disk D in step 64, while in step 63, the output of the signal output element 33 becomes low level so that the pickup device 14 If it is determined that the disc information recording area is located in the disc information recording area, the control unit 30 determines whether or not the non-read mode (set in steps 53 and 54) of the disc information recording area is set in step 65. If it is not set, i.e., if the disc reproducing system is operated by reading the normal disc information recording area in the step 55 by the non-input of the fast start command, 66 reads out the disc information recording area by the optical pickup device 14 is performed by the normal disk reproduction start mode.

On the other hand, if the non-reading mode of the disc information recording area is set in step 65, the pickup device 14 causes the pick-up device 14 to perform the step based on the high level output of the signal output section 33 of the level detector 28 in step 67. If it is determined that it is located in the program area of the disc D, the pickup device 14 is immediately moved to the program area of the disc D in step 68, for example, for reproduction of movie information or the like contained in the disc D. Given.

Subsequently, when the rotational speed of the spindle motor 69 is normally secured in step 69, the process of performing data up to the time axis correction of the program area read by the pickup device 14 is performed in step 70. When the search input of the disk is input after performing such a process, the control data (24-bit biphase code, Q-code, etc.) on the disk D is read out in step 71. Enters the normal playback mode.

As described above, according to the high speed starting device and the method of the disc reproducing system according to the present invention, the current pickup device is set before the spindle servo meter secures the normal operating condition by setting the high speed starting mode at the start for disc reproducing. If the pick-up device is located in the disc information recording area, the pick-up device is immediately moved to the program area on the disc to read the screen, and the control data recorded on the disc is read out to control the normal control mode. By entering the system, the access time of the disk can be shortened.

Claims (8)

By using the spindle servometer 10,12 and the optical beam, the spindle servometer 10,12 rotates the disk D having a disc information recording area and a program area containing video and / or audio data at constant speed. A pickup device 14 for reading data from the rotating disk D, an RF amplifier 16 for amplifying the data read by the pickup device 14, and the data amplified by the RF amplifier 16. Performing time-axis calibration using the FM demodulator 18 to demodulate, the phase synchronization controller 20 generating a clock by phase synchronization to correct data read out from the disk D, and the phase synchronized clock. A disc reproducing system comprising a time axis corrector 22 and a video amplifier 24 for amplifying a video signal read out from the disc D and outputting screen output data. Start command A high speed start mode switch 26 for inputting and setting a high speed start mode; A level detector (28) for detecting an average level of data corrected by the time axis corrector (22); And control means (30) for controlling movement of the pickup device (14) to the program area based on the average level of data detected by the level detector (28) when the high speed start mode is set. A high speed starter of a disc playback system. The filter of claim 1, wherein the level detector 28 filters an amplifier 31 that amplifies the time-axis-corrected data and data read from the disk D amplified by the amplifier 31 to obtain an average value. Element 32 and a signal output element 33 which is switched in accordance with the level of the average value output from the filter element 32 to generate a signal representing a disc information recording area and a program area of the disc D. A high speed starter of a disc playback system. 3. The disc reproducing system according to claim 2, wherein a signal representing a disc information recording area and a program area of said disc (D) generated in said switching transistor 34 is position area information of said pickup device (14). High speed starter. 4. The pickup device according to claim 3, wherein the control unit (30) is configured according to the positional information of the pickup device (14) generated by the signal output element (34) of the level detection unit (28) at the time of high speed start command input. And if it is determined that the current position of the disc is a disc information recording area, the pickup device 14 immediately moves to the program area to control screen output. The disk (D) having a disc information recording area and a program area containing video and / or audio data is rotated at constant speed by the spindle servometers 10 and 12, and the disc D is used by using the light beam from the pickup device 14. Read data from D), amplify the data read by the pickup device 14, FM demodulate the amplified data, and generate a phase synchronized clock by the phase synchronization control means 20 for the demodulated data. In a disc reproducing system which amplifies a video signal and then amplifies a video signal to output screen output data, wherein the level detecting means 28 reads from the disc D when a high-speed command is input to the disc D. Detecting an average level of data of the disc information recording area and the program recording area on the disc (D) which has been time-axis corrected; On the basis of the average level of the disc information recording area and the program recording area of the disc D detected by the level detecting means 28, the control means 30 moves to the program area of the pickup device 14; A high speed start method of a disc reproducing system, comprising the step of controlling. The method of claim 5, wherein the level detecting step by the level detecting means (28) comprises amplifying the data read out from the disk (D) and time-calibrated, and filtering the amplified signal to obtain an average value of the data. And generating a signal indicative of a disc information recording area and a program area of said disc in accordance with the level of said average value. 7. A disc reproducing apparatus according to claim 6, wherein a signal representing a disc information recording area and a program of said disc (D) detected by said level detecting means (28) is position area information of said pickup device (14). High speed startup method of system. 8. The control unit (30) according to claim 7, wherein the control unit (30) determines that the positional information of the pickup device (14) detected by the level detecting means (28) is a disc information recording area when a high speed start command is made to the disc (D). And a pickup device (14) to immediately move to the program area of the disc (D) to perform screen output.