KR19980061663A - Repeat play method for optical disc player - Google Patents

Abstract

The present invention relates to a repeat play method of an optical disc player, comprising: (a) storing and setting a section repeat key signal while a play is being performed, and inputting a repeat play start position, an end position, and a repeat count; (B) determining whether the current playback mode is a foreign language learning mode; (C) if the playback mode is a foreign language learning mode, varying and setting the playback speed step by step based on the number of repetitions set in step (a); And (d) executing the repeated playback by the set number of repeated playbacks while searching for the repeated playback start position set in step (a) and then changing the playback speed at the variable set playback speed.

Therefore, the present invention, when performing the repeated playback in the optical disk player, when the current playback mode is a foreign language learning mode can be played by setting the playback speed slower than the normal playback speed to help the user learn foreign languages It can give an effect.

Description

Repeat play method for optical disc player

The present invention relates to a repetitive playback method in an optical disc player. In particular, when repetitive playback is performed when learning a foreign language through a disc on which foreign language data is recorded, the playback speed is set stepwise from a speed lower than the basic playback speed. A repetitive reproduction method of an optical disc player for performing repetitive reproduction.

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.

1 is a schematic structural block diagram of a general optical disc player as described above.

As shown in FIG. 1, a typical optical disc player includes a pickup and actuator unit 10, an RF (radio frequency) signal amplification and servo signal processing unit 20, a motor and motor driver 30, a key input unit 40, a microcomputer, and a microcomputer. 50, the digital signal processor 60, the MPEG decoder 70, the audio signal processor 80, the video signal processor 90, the speaker 100, and the screen 110.

The pickup and actuator unit 10 performs an optical pickup from a disc loaded in a disc tray (not shown), and outputs the RF signal read out to the RF signal amplification and servo signal processing unit 20 accordingly.

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

The RF signal amplification and servo signal processing unit 20 amplifies the RF signal provided from the pickup and actuator unit 10 and provides a servo control signal according to the signal to the motor and the motor driving unit 30 to provide the focus servo and the tracking servo. To be done.

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 100 and the screen 110, respectively. And the screen 110 are displayed as an audio and an image, respectively.

On the other hand, such an optical disc player is provided with a number of functions to provide ease of use, among which the repeat play function is to repeat the predetermined number of times for the set repeat section by setting the repeat section and the number of repeats, This function is widely used when playing a learning disc.

In addition, among such learning discs, discs for learning a foreign language are also widely manufactured, and the above-described repeat play function is more widely used when learning a foreign language.

By the way, the conventional reproducing function only reproduces repeatedly for a set section and its reproduction speed is the same as the normal reproduction speed. That is, in the conventional optical disc player, it is not possible to execute repeat playback at varying playback speeds. Therefore, in the case of learning a foreign language other than the native language, there is a problem that the user may not clearly understand even if the repeated playback is performed at the normal playback speed.

Accordingly, the present invention has been made to solve such a problem in the related art, and an object of the present invention is to repeat the playback speed by varying the playback speed slower than the normal playback speed in the foreign language learning mode in performing the repeated playback in the optical disc player. An object of the present invention is to provide a repetitive reproduction method of an optical disc player capable of performing reproduction.

According to a preferred embodiment of the present invention for achieving this object, a crystal oscillator for oscillating a clock signal of a predetermined frequency, a first divider for dividing the clock signal oscillated by the crystal oscillator at a predetermined frequency division ratio, and a predetermined frequency An up / down counter for setting a division ratio of a system clock signal of a second divider; a second divider for dividing the system clock signal at a division ratio set by the up / down counter; and in the first and second dividers A phase comparator for comparing the phases of the divided clock signals and outputting the comparison signal, a low pass filter unit (LPF) for removing high frequency components from the output signal of the phase comparator, and a predetermined value based on the output signal of the LPF Playback speed of the optical disc player by providing the oscillation clock signal as a system clock signal to the second divider and the optical disc player. In the repeated playback method of an optical disk player using a playback speed control device of an optical disk player including a voltage controlled oscillator (VCO) for controlling, (A) A section repeat key signal is input during playback; Storing and setting a repeat play start position, an end position, and the number of repetitions when the repeat play is input; (b) determining whether the current play mode is a foreign language learning mode; and (c) if the play mode is a foreign language learning mode. Setting and varying the playback speed step by step based on the number of repetitions set in step (a); and (d) searching for the repeated playback start position set in step (a) and then setting the variable playback speed. And repeating the playback by the set number of repeated playbacks while varying the playback speed.

1 is a schematic block diagram of a typical optical disc player

Fig. 2 is a block diagram showing the configuration of an apparatus for varying reproduction speed of an optical disc player for carrying out the present invention.

3 is a detailed flowchart of a method of repeating playback of an optical disc player according to a preferred embodiment of the present invention.

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

61: up / down counter 62: crystal oscillator

63, 66: dispenser 64: phase comparator

65: LPF66: VCO

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

Fig. 2 is a block diagram showing a playback speed varying apparatus in an optical disc player used for practicing the present invention.

As shown in Fig. 2, an apparatus for implementing the present invention includes a crystal oscillator 62, first and second dividers 63 and 66, a phase comparator 64, a low pass filter section (LPF: 65). And up / down counters 61 and voltage controlled oscillators (VCOs) 66.

The crystal oscillator 62 oscillates a predetermined frequency used as a system clock signal of the optical disc player, for example, a 19.78 MHz clock signal and provides it to the first divider 63. In general, the crystal oscillator ( The clock signal oscillated at 62 is used as the system clock signal of the optical disc player.

In addition, the first divider 63 divides the clock signal oscillated by the crystal oscillator 63 at a predetermined division ratio and provides it to the phase comparator 64.

On the other hand, the phase comparator 64 compares the clock signal divided by the first divider 63 with the clock signal divided by the second divider 66 to be described later, and outputs the comparison signal to the LPF 65.

In addition, the up / down counter 61 is for setting a division ratio of a clock signal of a predetermined frequency provided from the VCO 66, which will be described later, to the second divider 66. A key input unit as shown in FIG. It is driven under the control of the microcomputer 50 through 40 to set the division ratio of the second divider 66 and provide it to the second divider 66.

The second divider 66 divides the system clock signal provided from the VCO 66 at the division ratio provided by the up / down counter 61 and provides the divided signal to the phase comparator 64 so that the divided signal is divided. Phase comparison is performed with the signal divided in the first divider 63.

As described above, the phase comparator 64 phase compares the output signals of the first and second dividers 63 and 66, and outputs the comparison signal to the LPF 65, and the LPF 65 is connected to the phase comparator. The high frequency component is removed from the output signal to provide a signal representing the voltage component to the VCO 66.

Then, based on the voltage signal provided from the VCO 66 SMS LPF 65, a digital signal processing unit as shown in Fig. 1 as a system clock signal using, for example, a 19.78 to 13.26 MHz oscillation clock signal of a predetermined frequency ( 60), the MPEG decoder 70, the audio signal processor 80, the video signal processor 90, etc., adjusts the playback speed when the playback is performed in the optical disc player. That is, the digital signal processor 60, the MPEG decoder 70, the audio signal processor 80, and the video signal processor 90 process data in synchronization with the frequency of the system clock signal provided from the VCO 66. The output speed is adjusted according to this variable system clock signal during reproduction.

3 is a flowchart of a method of repeating playback of an optical disc player according to a preferred embodiment of the present invention.

If the section repeat key signal is input from the key input unit 40 in step S20 while the playback is performed for the predetermined disk in step S10, the microcomputer 50 sets the optical disk player to the section repeat playback mode. do.

Thereafter, when the section repeating start position A, the section repeating end position B, and the number of repetitions C inputted in the step S30, the step S40 and the step S45 are input through the key input unit 40, In step S50, the microcomputer 50 includes the section repeat start position A, the section repeat end position B, and the number of repeats C entered in steps S30, S40, and S45. To a stored memory (not shown).

Thereafter, in step S60, the microcomputer 60 determines whether the current playback mode is the foreign language learning mode, that is, whether the foreign learning mode key signal is inputted through the foreign language learning mode key of the key input unit 40 by the user or when the foreign language is reproduced. Determine whether the learning mode is preset.

In step S60, if the current playback mode is not the foreign language learning mode, the flow advances to step S100. In step S1000, the microcomputer 50 generates a control signal to drive the pickup unit 10 to repeat playback start position. After searching (A), repeat playback is executed according to the set number of times, and the flow proceeds to step S110.

In addition, in step S60, if the current playback mode is a foreign language learning mode, in step S70 the playback speed input through the key input unit 40, that is, the playback speed slower than the normal playback speed, is entered in step S50. On the basis of the set number of repetitions, it is possible to set the variable to be the same as the normal playback speed in the last step so that the playback speed is gradually increased at a slower playback speed than the normal playback speed. Here, the variable setting of the reproduction speed according to the set number of repetitions can be performed to execute the reproduction for the set number of times at each of the variable set reproduction speeds, and to set the variable step of the reproduction speed by the number of repetitions, Various methods can be determined, such as to perform playback for a section set once at each playback speed.

On the other hand, when the setting of the variable playback speed is completed in step S70, the microcomputer 50 generates a control signal in step S80 so that the pickup 10 is located at the start point A of the set repetition period ( 10) to search for the starting position (A).

Thereafter, in step S90, the repeat playback is executed in accordance with the set number of repetitions while varying the playback speed at the set playback speed, that is, increasing.

Finally, in step S110, the microcomputer 50 determines whether the set repeat play is completed. When the repeat play is completed, the flow returns to perform normal play again from the set repeat play end position B. FIG.

As described above, the present invention allows the user to learn a foreign language because the playback speed can be set to a slower speed than the normal playback speed when the current playback mode is a foreign language learning mode in executing the repeated play in the optical disc player. There is an effect that can help you.

Claims (1)

A crystal oscillator 62 for oscillating a clock signal of a predetermined frequency, a first divider 63 for dividing a clock signal oscillated by the crystal oscillator 62 at a predetermined division ratio, and a division of a system clock signal of a predetermined frequency An up / down counter 61 for setting a ratio, a second divider 66 for dividing the system clock signal at a division ratio set by the up / down counter 61, and the first divider 63 And a phase comparator 64 for comparing the phases of the clock signal divided by the second divider 66 and outputting the comparison signal, and a low pass filter for removing high frequency components from the output signal of the phase comparator 64. (LPF: 65) and providing a predetermined oscillation clock signal as a system clock signal to the second divider and the optical disc player based on the output signal of the LPF 65 to adjust the playback speed of the optical disc player. Voltage Controlled Oscillator (VCO: 66 In the repeated playback method of an optical disk player using the playback speed adjusting device of the optical disk player comprising: (A) storing and setting a section repetition key signal while a reproducing is being executed and a reproducing start position, an end position and a number of repetitions are inputted; (B) determining whether the current playback mode is a foreign language learning mode; (C) if the playback mode is a foreign language learning mode, varying and setting the playback speed step by step based on the number of repetitions set in step (a); (D) repeating the optical disc player including searching for the repeated playback start position set in step (a) and then executing the repeated playback by the set number of repeated playbacks while varying the playback speed at the variable set playback speed. How to play.