KR970010946B1 - Apparatus on fast search of reproduction position in laser disc player - Google Patents

Abstract

An apparatus for high-speedily searching a play position of a laser disk player is disclosed. The apparatus comprises a unit(10) for setting a play position high speed searching mode for the disk; a play position pointer(12) for pointing the play position for disk at the state of the play position high speed searching mode; a play position controller(14) for providing a control signal for controlling a screen display of a graphic bar(26A) representing a play position information for the disk and providing a designated play position information; a graphic information memory(16) for storing a graphic data for a graphic bar(26A) and a curser(26B) pointing the play position; a video signal processing unit(18) for providing a video signal representing the graphic bar and the curser position based on the play position for the disk; a multiplexor(22) for switching the video information from the disk and the video signal representing the graphic bar and the curser position; and an image signal processing unit(24) for providing the output signal from the multiplexor(22) to a CRT monitor.

Description

High-speed search device for playback position in laser disc player

1 is a block diagram showing the structure of a high speed search apparatus for reproducing position in a laser disc player according to the present invention.

2 is a schematic diagram of a CRT monitor for explaining the playback position setting operation performed by the playback position high speed search apparatus in the laser disk player according to the present invention.

3 (a) and 3 (b) are diagrams for explaining a schematic configuration of the playback position setting section shown in FIG.

* Explanation of symbols for main parts of the drawings

10: play position search mode setting unit 12: play position designation

14: playback position control unit 16: graphic information storage unit

18: video signal processing unit 20: digital-analog converter

22: multiplexer 24: video signal processing unit

26: CRT monitor 30: carbon stripe

32 Knob 36 Analog-to-digital converter

38 variable resistance element 40 analog-to-digital converter

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-speed search position of a playback position in a laser disk player, and more particularly, to resistance-voltage change on a graphic bar displaying an entire playing time (or playing frame) of a disk on a CRT monitor. The present invention relates to a reproducing position high speed search apparatus in a laser disc player configured to search for a reproducing position of a target disc at high speed by specifying a reproducing position.

In a disc-shaped information recording medium (hereinafter, simply referred to as a disc) in which a large amount of audio and video information is recorded, a constant liner velocity depends on the arrangement of sectors on a track on which information is recorded. CLV) and Constant Angular Velocity (CAV). According to such an information recording method, in the CLV disc, the area of the track on which information is recorded is set to be the same on the inner and outer circumferences of the disc, whereas in the CAV disc, the inner and outer tracks are recorded. The areas are set differently from each other so that the same amount of information is recorded.

In a laser disc player as a device for reproducing such a disc, information is reproduced from the disc while performing speed control of the spindle servo system driving the disc in accordance with the information recording method of the reproducing active disc.

By the way, in recent years, a high speed search function for searching and reproducing a desired play position from information recorded on a disc has been considered for a laser disc player. When searching for a playback position on a disc at high speed, the playback position is searched based on the total playback time of the disc in the case of the CAV method. The search for the playback position is made based on the above.

That is, when performing a fast search of the playback position on the disc, the time information of the position to be searched for the CAV disc should be input, and the frame information of the position to be searched for the CLV disc should be input.

Therefore, if time information or frame information for the correct playback position is not input on the disc, the search for the correct playback position becomes impossible. Therefore, if the target position is not correctly searched, input of empty time information or frame information must be performed. Disadvantages arise.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and displays a graphic bar indicating the entire play time or play frame of a disc on a play screen output device of a laser disc player, and the play position on the graphic bar by resistance-voltage change. It is an object of the present invention to provide a reproducing position high speed search apparatus in a laser disc player capable of searching for a reproducing position at high speed.

In order to achieve the above object, according to the present invention, by controlling the drive servo circuit based on the TOC data from the disk stored in the TOC memory control operation to enable the rotation servo of the disk, the transfer servo of the optical pickup and the focusing / tracking servo A laser disc player which reads and reproduces audio and video information from a disc on which audio and video information is recorded, and which is provided on a front panel of the disc player, to provide a system control unit. Playback position search mode setting unit for setting the high speed search mode, and playback position designation and CRT monitor capable of variable high speed designation of the playback position for the disc under the high speed search mode executed by the playback position search mode setting unit. The play position information (play time or play frame) for the disc on the In addition, the cursor on the graphic bar is moved and displayed in response to the screen display of the graphic bar and the playback position information designated by the playback position designator, and to the playback position of the disc variablely designated by the playback position designator. A playback position controller for outputting a control signal to the system controller for high-speed search, a graphic information storage unit for storing graphic data of the graphic bar and a cursor indicating a playback position, and playback of the disc provided from the playback position controller A video signal processor for outputting a video signal indicating a position of a cursor and a graphic bar provided from the graphic information storage unit based on the position; video information read from the disc under switching control from the playback position controller and the video signal processor; Output graphic bar and cursor position In the laser disk player comprising a multiplexer for switching and outputting a video signal, and an image signal processing unit for generating an R, G, B signal for outputting the video signal switched and output from the multiplexer to the CRT monitor. Provides a playback position high speed search apparatus.

According to the present invention, the reproducing position designator is formed with a knob slidably installed in the longitudinal direction on the front control panel of the disc player and a length corresponding to the entire reproducing time or the reproducing frame of the disc, so that carbon for resistance-to-voltage conversion is provided. A stripe, an elastic contact provided elastically on the front side of the knob and contacting the carbon stride, and digitally converting the voltage obtained from the carbon stripe as a displacement voltage of the cursor according to the slide movement of the knob. It is configured with analog-to-digital converter. On the other hand, the reproducing position setting unit may be configured with a variable resistor whose resistance is changed by the knob and an analog-digital converter for digitally converting the voltage output to the variable resistor and outputting data specifying the displacement position of the cursor. have.

According to the high-speed search position of the playback position in the laser disk player according to the present invention configured as described above, the CRT according to the displacement position of the slideable knob provided on the front panel of the disk player. In addition to displacing the position of the cursor displayed on the monitor, the playback time or playback frame specified by the cursor is processed as the playback position information, and a high-speed search for the position designated by the cursor on the disk is performed.

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

1 is a block diagram of a high speed search position playback apparatus for a laser disk player according to the present invention. In the apparatus of the present invention, reference numeral 10 denotes a playback for a disk (not shown) on which audio information and video information are recorded. As the playback position search mode setting section for setting the out-of-position high-speed search mode, the playback denture search mode setting section 10 is provided on the front panel of the disc player as shown in FIG.

Reference numeral 12 denotes a regeneration position designation capable of designating a playback position for the disc while the high-speed search mode of the playback position for the disc is set by the playback position search mode setting section 10. As shown in FIG. 2, the positioning unit 12 is capable of designating a playback position for the disc by means of a knob slidably installed along its longitudinal direction on the front panel of the disc player.

That is, the reproducing position designating unit 12 is formed of a carbon stripe 30 having a predetermined length on the front panel of the disc player and a predetermined length on the front panel as shown in FIG. A knob 32 slidably installed through a slit, an elastic contact elastically supported on the front surface of the knob 32 and in contact with the carbon stripe 30 in conjunction with the slide operation of the high knob 32 ( 34) and an analog signal for digitally converting a variable voltage signal applied from the elastic contact point 34 according to the slide displacement of the knob 32 as a displacement signal of a cursor shown on the CRT monitor 26 and outputting it. It is configured by tapping the digital converter 36.

According to the configuration of the regeneration position positioning unit 12, one end of the carbon stripe 30 is connected to the power supply (Vcc) terminal, the other end is connected to the ground terminal, and a constant level power supply (Vcc) is applied to both ends. The length of the carbon stripe 30 is preferably set to correspond to the entire playing time of the disc so that the voltage level from the carbon stripe 30 detected by the slide displacement of the knob 32 is applied to the disc. The analog-to-digital converter 36, which is generated as a reproducing position specifying signal for the digital signal, converts it into a digital signal and outputs the digital signal.

3 (b) is a view for explaining another example of the configuration of the repositioning positioning unit 12 shown in FIG. 3 (a), and the carbon stripe 30 shown in FIG. Instead of using it, the variable resistance element 38 whose resistance is varied in accordance with the displacement of the knob 32 and the voltage obtained by the variable resistance element 38 are digitally converted and output as a reproduction positioning signal for the disc. It consists of an analog-to-digital converter 40.

Further, reference numeral 14 denotes that when the playback position search mode for the disc is set by the playback position search mode setting unit 10, access control of the graphic information storage unit 16, which will be described later, causes the graphic bar data to be multiplexed. To display the screen at a predetermined screen position of the CRT 26, and to receive the reproduction position designation signal in the form of digital data designated by the reproduction position designation unit 12, and to change the data value of the variable reproduction position indication signal. Read control signals and switching for controlling the graphic information storage unit 16 and the multiplexer 22 to be described later so that the cursor is moved and displayed at a corresponding graphic bar position (i.e., a graphic bar position corresponding to a predetermined track position of the disc). In addition to outputting a control signal SEL, an optical pickup (not shown) is transferred onto a disc to a reproducing position that is variable according to the data value of the reproducing position specifying signal, thereby reading information. It indicates the reproduction position controller for generating a control signal for controlling to.

Reference numeral 16 denotes a graphic information storage unit which stores graphic bar data of the graphic bar and a cursor indicating a playback position, and 18 denotes a regeneration position for the disc provided from the reproduction position control unit 14. And a video signal processor for outputting a video signal indicating a position outside the cursor and a graphic bar provided from the graphic information storage unit 16 based on a control signal.

Also, reference numeral 22 is provided from the digital-analog converter 20 that receives the switching control signal SEL from the playback position controller 14 and converts the digital video information read from the disc into analog video information and outputs the analog video information. And a multiplexer for switching and outputting the video information and the graphic bar output from the video signal processing unit 18 and the video signal indicating the position of the cursor. A superimposition processing apparatus for superimposing the video signal instead of the multiplexer May be employed.

Reference numeral 24 denotes an image signal processing unit for generating an R, G, B signal for outputting the video signal switched by the multiplexer 22 to the CRT monitor 26.

Further, reference numeral 42 receives TOC data recorded on a predetermined disk, and receives TOC data stored in the TOC memory 44 by receiving a control signal from the reproduction position control unit 14 in advance in the TOC memory 44. A system control unit which performs a control operation so that the optical pickup is transferred to the variable reproduction position of the disc designated by the reproduction position designating unit 12 to read the information, and 46 is desired under the control of the system control unit 42. The drive servo circuit is composed of a spindle servo system and an optical pickup servo system that perform a disc rotation servo, an optical pickup transfer servo, and a focusing / tracking servo function so that a disc can be transferred to a track position and normal information reading can be performed.

Next, the operation of the playback position high speed search apparatus in the laser disk player according to the present invention configured as described above will be described.

First, as shown in FIG. 2, when the playback position search mode for the disc is set by a button operation of the playback position search mode unit 10 installed on the front panel of the disc player, the playback position control unit 14 The video signal processing unit 18 is controlled to process the graphic bar and cursor data stored in the graphic information storage unit 16 so that the video signal processing unit 18 is applied to the image signal processing unit 24 through the multiplexer 22. The multiplexer 24 processes the graphic bar and the cursor data switched through the multiplexer 22 as an image signal to be displayed on the CRT monitor 26 shown in FIG.

In other words, a graphic bar 26a having a length corresponding to the total playing time of the disc is displayed on the lower side of the screen of the CRT monitor 26 shown in FIG. 36b is displayed.

In this state, when the knob 32 of the reproducing position setting unit 12 provided on the front panel of the disc player is moved, the carbon stripe 30 or the third stripe (shown in FIG. The voltage level according to the displacement of the knob 32 on the resistance element 38 of b) is digitally converted by the analog digital converter 36 or 40 so that the reproduction position control unit 14 is used as the reproduction position specifying signal of the cursor 26b. Is provided.

Therefore, the playback position control section 14 controls the video signal processing section 18 according to the playback position designation signal provided from the playback position designation section 12 to display the cursor 26b displayed on the CRT monitor 26. In addition to performing timing control of the processing of the video signal so that the position of the signal is changed, the multiplexer 22 controls the switching control signal SEL to synchronize the timing of the video signal processing with the video signal according to the cursor 26b. Will be passed through.

By this processing, the graphic bar 26a indicating the cursor 26a displayed on the CRT monitor 26 shows the total reproduction time of the disc (in the case of a CLV disc: a play frame in the case of a CAV disc). Is shifted to a position corresponding to the displacement amount of the knob 30 outside the reproduction position setting unit 12 on the image.

In such a state, the reproducing position control section 14 determines the position of the currently designated cursor 26b if the displacement information other than the cursor 26b, that is, the reproducing position signal by the reproducing position setting unit 12 is not input for a predetermined time. Determining information as a fast search position for the disk and generating a control signal to the system controller 42. The system controller 42 controls the drive servo circuit 46, which consists of a spindle servo system and an optical pickup servo system, which are employed in the laser disc player, based on the TOC data stored in the TOC emory 44 in advance, so that the cursor 26b is used. Access to the track position on the disc corresponding to the position indicated by is made.

On the other hand, in the above description, only the displacement control of the cursor 26b to the playback position with respect to the disc specified by the playback position designation 12 has been described, but in fact the graphics processed by the video signal processing section 18 The video signals for the bars 26a and the cursors 26b are switched output at a predetermined switching ratio in the multiplexer 22 and the video alarm converted into analog information by the digital-analog converter 20 read out from the disc. And the video information read out from the disc by the video signal processing unit 24 and the position information of the graphic bar 26a and the cursor 26b to the R, G, and B signals. The graphic bar 2 is processed as a video signal and provided to the CRT monitor 26, so that video information read and reproduced from the disc is displayed on the CRT monitor 26. FIG. 6a) and the graphics of the cursor 26b are superimposed.

In addition, according to the present invention, although the graphic processing of the graphic bar 26a and the cursor 26b displayed on the CRT monitor 26 in the above example is performed by the video signal processing unit 18, the above-described method is described. It is a matter of course that graphic processing of the graphic bar 26a and the cursor 26b can be realized on the CRT monitor 26 by means of an on-screen display (OSD) circuit under the control of the playback position control unit l4.

As described above, according to the high-speed search position of the playback position in the laser disk player according to the present invention, a graphic bar having a length corresponding to the entire playback time (or playback frame) of the disk is displayed on the CRT monitor and the graphics are displayed by the cursor. By specifying the position of the bar, the high speed search for the playback position of the disc can be performed, so that the search for a more purified playback position can be performed.

Claims (3)

The system control unit 42 controls and controls the drive servo circuit 46 based on the TOC data from the disc stored in the TOC emulator 44 to enable the rotation servo of the disc, the moving servo of the optical pickup, and the focusing / tracking servo. A laser disc player that reads and reproduces audio and video information from a disc having audio and video information recorded thereon, the laser disc player being provided on the front panel of the disc player to provide a high-speed search of the playback position with respect to the disc. Playback position search mode setting section 10 for setting a mode: A relocation position index capable of variable high speed designation of a playback position for the disc under the fast search mode executed by the playback position search mode setting section 10; Step 12: Screen of graphic bar 26a showing playback position information (play time or play frame) for the disc on CRT monitor 26 The cursor 26b on the graphic bar 26a is moved and displayed in response to the display and the playback position information designated by the playback position designation 12, and the playback position designation 12 Regeneration position control unit 14 for outputting a control signal to the system control unit 46 to perform a high-speed search to the play position of the variable-designated disk: a graphic of the graphic bar 26a and the cursor 26b indicating the play position Graphic information storage unit 16 in which bar data is stored: a video indicating the position of a graphic bar and a cursor provided from the graphic information storage unit 16 based on the regeneration position for the disc provided from the playback position control unit 14; A video signal processing unit (8) for outputting a signal: video information read from the disc and the video signal processing unit (18) output under the switching control from the repositioning position control unit (14). A multiplexer 22 for switching the graphics as a video signal indicating the position of the cursor and the output; And a video signal processor (24) for generating a R, G, B signal for outputting the video signal switched by the multiplexer (22) to the CRT monitor (26). Playback position high speed search device in. The apparatus of claim 1, wherein the reproducing position setting unit (12) is slidably installed through a carbon stripe (30) formed in a predetermined length on the front panel of the disc player and a slit formed in a predetermined length on the front panel. The knob 32, the elastic contact 34 elastically supported on the front surface of the knob 32 and in contact with the carbon stripe 30, and the slide displacement of the knob 32 to the CRT monitor 26. The high speed search apparatus for reproducing position in a laser disk layer, characterized in that the display is configured with an analog-to-digital converter (36) for digitally converting and outputting it as a displacement signal of a cursor. 3. The regenerative external value indicating unit (12) according to claim 2, wherein the regenerative external pointing unit (12) digitally converts a voltage obtained by the variable resistance element (38) whose resistance is varied according to the displacement of the knob (32) and the variable resistance element (38). A reproducing position high-speed search apparatus for a laser disc player, characterized by comprising an analog-to-digital converter (40) outputting a reproducing position specifying signal for a disc.