KR950012241B1 - Reduction method of starting time for ldp - Google Patents

Abstract

This method comprises; first procedure which decides whether fast reproduction mode established in mode setting part, second procedure that spindle motor driving part drive spindle motor when fast play mode established, third procedure which decide whether spindle motor is locked state, fourth procedure which confirms only track number information among biphase code by pick-up device when spindle motor is locked state, fifth procedure which transport pick-up device to a initial part of program region in pick-up transport part, sixth procedure which outputs to display mediate with display driving part, seventh procedure which conduct reproduction motion after reading subcode and the rest data of biphase code

Description

How to reduce the initial startup time of the laser disc player

1 is a block diagram illustrating a method for reducing initial startup time of a laser display according to the present invention.

FIG. 2 is a flowchart of the operation of the microcomputer shown in FIG.

* Explanation of symbols for main parts of the drawings

20: spindle motor 30: spindle motor drive unit

40: pickup device 50: pickup transfer unit

60: mode setting unit 70: display driver

80: display 100: micom

The present invention relates to a method for shortening the initial startup time of a laser disc player, and more particularly, to a method for reducing an initial startup time until a screen is played when watching a movie or a concert in a laser disc player.

Conventionally, when the tray equipped with a laser disk is inserted, the laser disk is chucked, and the spindle motor rotates to the normal speed, the pickup device continuously reads and checks the 24-bit biphase code and sub-Q code, which are control signals in the disk. Next, the TOC (Table Of Content) data is read, stored in the microcomputer, and then moved to the program area to play the screen. Therefore, there was a problem that the initial startup time until the screen is reproduced is long.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a method for shortening the initial startup time of a laser disc player which can reduce the initial startup time until a screen is played when watching a movie or a concert.

According to a preferred embodiment of the present invention to achieve the above object, the first step of determining whether the quick play mode is set in the mode setting unit, and the spindle motor when the quick play mode is set in the first step A second step of causing the drive unit to drive the spindle motor; a third step of determining whether the spindle motor is locked; a step of checking only track number information in the biphasic code by a pickup device when the spindle motor is locked; Step 4, if the track number is confirmed, step 5 in which the pickup unit moves the pickup device to the beginning of the program area. The data is read from the program area by the pickup device and displayed on the display unit driver. In the sixth step of outputting, the remaining data and sub-codes of the bi-phase code are read and stored by the pickup apparatus. A seventh step of performing a normal playback operation is characterized by the above-mentioned.

1 is a block diagram illustrating a method for shortening an initial startup time of a laser disc player according to the present invention. In the figure, the mode setting unit 60 is for setting a quick play mode for quickly playing a laser disc, and the quick play mode is set by a user. The microcomputer 10 controls the spindle motor driver 30 for driving the spindle motor 20 and the pick-up transfer unit 50 for feeding the pickup device 40 according to the mode set in the mode setting unit 60. .

The operation of the microcomputer 10 will be described with reference to the flowchart shown in FIG.

First, when power is input, the microcomputer 100 performs initialization (step 1, step 2), and moves to step 3 to determine whether the quick play mode is set in the mode setting unit 60, and the quick play mode is set. If not, control moves to step 4 to perform the existing start control. That is, in step 4, when the tray containing the laser disk is inserted, the laser disk is chucked, and the spindle motor rotates to the normal speed, the pickup device continues the 24-bit biphase code and sub code located at the innermost side of the disk. After reading, the read data is stored in the microcomputer 100, and then the program is moved to the program area to reproduce the screen.

On the other hand, if it is determined in step 3 that the quick regeneration mode is set, it moves and causes the spindle motor driving unit 30 to drive the spindle motor 20 (step 5), and then in step 6 the spindle motor 20 If it is not in the locked state, it is judged whether it is in the locked state (stable state of the phase synchronous loop in the spindle servometer), and the judgment of step 6 is continued, and if the spindle motor 20 is in the locked state. Control passes to step 7.

Subsequently, in step 7, the microcomputer 100 checks only the track number information in the 24-bit biphasic code by the pickup device 40. If the track number is not confirmed, the microcomputer 100 repeats step 7 and checks the track number. If so, control passes to step 8.

Thereafter, in step 8, the microcomputer 100 causes the pickup and transfer unit 50 to move the pickup device 40 to the beginning of the program area, and then determine whether access is completed in step 9.

Next, when it is determined that the access is completed in step 9, the microcomputer 100 reads data from the program area by the pickup device 40 and outputs the data to the display 80 via the display driver 70 (step 10). Thereafter, the microcomputer 100 reads and stores the remaining data and subcodes of the 24-bit biphase code from the pickup device 40 and performs normal playback operations (steps 11 and 12).

According to the present invention, since a disc such as a movie or a concert is generally recorded as a long time disc of a constant linear velocity method, it is not necessary to read the TOC area. That is, in order to output the screen, only the track number within the 24-bit bi-phase code needs to be known by the microcomputer. Therefore, after the spindle motor is locked, only the track number is read from the bi-phase code, and then the screen is moved to the beginning of the program area to output the screen. After that, the remaining data and sub-codes of the bi-phase code are read out and the playback mode of the passage is entered.

Accordingly, when watching a movie or a concert in the laser disc player, it is possible to shorten the initial startup time until the screen is played.

Claims (1)

A first step of determining whether the quick play mode is set in the mode setting unit 60, and the spindle motor driver 30 drives the spindle motor 20 when the quick play mode is set in the first step. The second step of determining, the third step of determining whether the spindle motor 20 is in the locked state, the track number information of the biphasic code is checked only by the pickup device 40 when the spindle motor 20 is in the locked state A fourth step to move the pickup device 40 to the beginning of the program area when the track number is confirmed; the data from the program area to the pickup device 40; A sixth step of reading and storing the remaining data and sub-codes of the bi-phase code by the pickup device 40 to perform the normal reproducing operation. Method for reducing the initial startup time of the laser disc player, characterized in that consisting of seven steps.