KR0171743B1 - Apparatus and method for controlling reproduce position search in high speed for optical disc player - Google Patents

Abstract

The present invention relates to a high-speed position search control apparatus and method thereof for an optical disk, the remote control device 12 for the direction up / down control for setting the position search mode and the direction of the position search for the optical disk (10) And a program storage unit 36 in which a control procedure programmed to set a search position for the entire reproduction time of the optical disc 10 is set every 1/2 point, and the program under the position search mode set in the remote control device 12. And a control means 14 for performing a position search while resetting 1/2 point according to the direction up / down control by performing a control procedure stored in the storage means 36, wherein the microcomputer 14 includes When the search direction is set in the up (+) direction in the position search mode, the search operation is performed in the down (-) direction while executing the position search while dividing the total playing time of the optical disc 10 by 1/2. Each time the set is going to the division of 1/2 for the entire duration of said optical disk to execute a location detection.

Description

High speed position search control device and method of optical disk

1 is a block diagram of an optical disc reproducing apparatus to which a high-speed position search control apparatus according to the present invention is applied.

2 is a flowchart for explaining a repetitive playback control method for an optical disc according to the present invention.

FIG. 3 is a schematic diagram exemplarily illustrating a playback position search process performed by the repeat playback control apparatus for an optical disk according to the present invention.

* Explanation of symbols for main parts of the drawings

10: optical disc 12: remote control device

12a: location search mode key 14: micom

16: servo control unit 18: spindle motor drive unit

20: optical pickup unit 22: optical pickup device

24: RF signal processing unit 26: digital signal processing unit

28: CD-ROM decoder 30: MPEG audio / video decoder

32: video output unit 34: audio output unit

The present invention relates to a high-speed position search control apparatus and method for an optical disc, and more particularly, to an optical disc that can search a play position at high speed while setting a 1/2 point as a search position with respect to the entire play time of the optical disc. A high speed position search control device and a method thereof.

Currently, according to an optical disc, which is noted as a large-capacity information recording medium, a compact disc in which only audio information is recorded, and a video compact disc, which has been compressed and recorded by a predetermined algorithm (MPEG algorithm), has been developed and proposed. . According to the characteristics of such an optical disc, it is possible to randomly reproduce information recorded at an arbitrary position, for example, to set a specific playback position while moving the position of the optical pickup apparatus along the radial direction of the optical disc for the entire reproduction time. This becomes possible.

Therefore, for example, when a movie program formed of a single track is temporarily stopped and then played back from the position, the search position can be easily searched. If you input the time for the target position, the optical pickup device is moved to the position to be played.However, in the case of the time search, the position search can be performed in a short time when the correct playback time for the play position is known. If you do not know the playback time accurately, it is necessary to set the repetitive time is not very effective.

In contrast, another method of searching for a playback position on the optical disc is considered to be a fast scan. However, according to the fast scan method, the playback position is searched while scanning at high speed for the entire playback time of the optical disc. There is a disadvantage that a relatively long time is used since a scanning operation is required for the entire reproduction time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the desired reproduction is made by several key operations for the entire reproduction time by specifying only the up / down direction while setting the entire reproduction time of the optical disc to the reproduction position every 1/2 point. It is an object of the present invention to provide a fast position search control apparatus and method for an optical disk for enabling a high speed search for a position.

In order to achieve the above object, according to a preferred aspect of the present invention, an optical disc reproducing apparatus for reproducing information read from an optical disc at a position to which an optical pickup device is moved, the setting of a position search mode for the optical disc and its position Remote control means for direction up / down control for designating a direction of search, program storage means for storing a control procedure programmed so that a search position for the entire reproduction time of the optical disc is set every 1/2 point, and in the remote control apparatus A high speed position search control apparatus for an optical disc comprising a control means for performing a position search while resetting 1/2 point according to the direction up / down control by performing a control procedure stored in the program storage means under a set position search mode. Is provided.

Preferably, the control means executes the position search while dividing the total playing time of the optical disc by 1/2 whenever the search direction is set in the up (+) direction under the position search mode, and the search direction is down. Whenever it is set to the (-) direction, the position search is executed by dividing the optical disc by half with respect to the total playing time, so that the up / down direction is appropriately set for the entire playing time of the optical disc. In this case, the playback position is searched at high speed.

According to another preferred aspect of the present invention, in the optical disc reproducing apparatus which controls the position of the optical pickup device to read / reproduce the information of the optical disc, the search direction is set in the state of setting the mode for searching the reproduction position for the optical disc. There is provided a high-speed position search control method for an optical disc which executes position search while dividing the entire reproduction time of the optical disc by 1/2 every time it is set in the up or down direction.

Therefore, according to the above-described high speed position search control apparatus and method of the optical disk according to the present invention, whenever the search direction is designated as the up or down direction while the position search mode is designated by the remote control means, the total reproduction time of the optical disc is determined. Since the position search is carried out gradually dividing into 1/2, the high speed search of the playback position is performed only by several direction setting operations.

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

1 is a block diagram of an optical disc reproducing apparatus to which a fast position search control apparatus according to the present invention is applied, and reference numeral 10 denotes an optical disc on which, for example, moving picture / audio information is recorded, which is an object of fast position search in the present invention. 12 denotes a remote control device for setting a reproduction control function of the information on the optical disc 10, and the remote control device 12 has a position search for designating a position search at the optical disc 10 at high speed. The playback direction of the optical disc 10 is set in the state where the position search mode is designated by the mode key 12a and the 10-key 12b applicable to input of a playback time, for example, and the position search mode key 12a in the present invention. A search direction key 12c for designating the search direction up (+) or down (-) at the center; a play key 12d for designating playback for the optical disc 10; It is configured.

14 is a microcomputer responsible for the overall control of the corresponding optical disk reproducing apparatus based on the control function set in the remote control apparatus 12, and the microcomputer 14 is connected to the optical disk 10 in the remote control apparatus 12. When the search direction is designated in the up or down direction by the search direction key 12c in the position search mode specified, the position search is performed by dividing the entire play time of the optical disc 10 by 1/2 position. Done.

16 represents a servo control unit for controlling the spindle servo and tracking / focusing servo for the optical disc 10 under the control of the microcomputer 14, and 18 represents the optical disc (based on the spindle servo control of the servo control unit 16). 10 shows a spindle motor driver for driving a spindle motor (not shown) for constant speed driving, and 20 denotes optical reading of information from the optical disc 10 based on tracking / focusing servo control of the servo controller 16. An optical pickup driving unit for controlling the position of the pickup device 22 is shown.

24 denotes an RF signal processor for RF amplification and EFM demodulation of the video / audio information of the optical disc 10 read by the optical pickup device 22, and 26 denotes an RF signal processor 24 for processing. A digital signal processor (CD-DSP) for processing the processed RF signal as a digital signal.

28 denotes a CD-ROM decoder which decodes according to the format of the optical disc 10 processed by the digital signal processing unit 26 to suit the CD-ROM data format, and 30 denotes that the CD-ROM decoder 28 processes the CD-ROM decoder. An MPEG audio / video decoder which decodes and reproduces the processed CD-ROM data based on the MPEG system, and 32 denotes an analog so that a video signal processed by the MPEG audio / video decoder 30 can be reproduced by a CRT device (not shown). A video output unit which processes and outputs an R / G / B signal is output. 34 denotes an audio output unit that outputs an audio signal processed by the MPEG audio / video decoder 30 as an analog signal to be reproduced by a speaker device (not shown). Indicates.

Further, 36 denotes an entire playback time of the optical disc at first whenever the up or down direction is designated by the search direction key 12c while the position search mode of the remote control device 12 is set by the position search mode 12a. In the state where 1/2 position of is set as the playback position, the position that is added or subtracted by 1/2 in the up direction or the down direction about the 1/2 position according to the number of key operations to which the up / down direction is designated is set. Represents a program storage unit in which a procedure is programmed to execute a search for a high speed playback position while setting the playback position.

Next, the high-speed position search performed by the high-speed position search control apparatus of the optical disk according to the above-described configuration will be described in detail with reference to the flowchart of FIG. 2 and the schematic diagram of the position search process shown in FIG.

First, the microcomputer 14 searches for the high-speed position by the position search key 12a of the remote control device 12 in step 40 while the initial start signal for the optical disc 10 is input from the remote control device 12. It is determined whether the mode is set. If the high speed position search mode is not set as a result of the determination, the flow advances to step 42 to execute a normal optical disc playback mode. That is, the microcomputer 14 controls the servo controller 16 in step 42 to allow the spindle motor to drive the optical disk 10 at constant speed by the spindle motor driver 18 and the optical pickup driver ( 20 to control the optical pickup device 22 to read the disc information of the corresponding optical disc 10 recorded in the lead-in information area of the optical disc 10 so that the RF signal processor 24 and the digital signal processor Received and remembered through (26).

Subsequently, when the normal playback of the optical disc 10 is designated, the microcomputer 14 executes the reproduction of information from the designated position (for example, the initial position) of the optical disc 10. RF image / audio information read by the optical pickup device 22 from the 10 is RF amplified and EFM demodulated by the RF signal processing unit 24 and applied to the digital signal processing unit 26, and the digital signal. The video / audio information processed as the digital signal by the processor 26 is applied to the MPEG audio / video decoder 30 after the CD-ROM decoder 28 performs decoding processing of the CD-ROM decoder.

Therefore, the MPEG audio / video decoder 30 performs a reconstruction process on the CD-ROM decoded video / audio information based on the MPEG system, and the MPEG decoded video on the MPRG audio / video decoder 30. The information is converted into an analog R / G / B signal by the moving image output unit 32 and reproduced by the CRT apparatus. In addition, the MPEG decoded voice information in the MPEG audio / video decoder 30 is applied to the voice output unit 34, converted into an analog signal, and then reproduced and output in the speaker device.

On the other hand, if it is determined in step 40 that the high speed position search mode is set by the position search key 12a, the microcomputer 14 sets the initial value (n = 1, 1) for the position search for the optical disk 10 in step 44. k = initial position; n is the number of seeks, k is the temporal position of the optical disc 10, and then the play position is 1/2 position (i.e., 64 minutes) of the total reproduction time of the optical disc 12. In the case of a video compact disc, it will be set to 32 minutes (see 50 in Fig. 3).

Subsequently, the microcomputer 14 proceeds to step 46 and determines whether the up / down direction is designated by the search direction key 12c within a predetermined time (approximately 20 sec), and thus the search direction key 12c is not input. In step 48, it is determined whether a key input of another function, such as the operation of the playback key 12d or the time setting by the 10-key 12b, is input. As a result, no key input is determined. In this case, an OSD signal is provided to the moving image output unit 32 so that an error message is displayed. If it is determined in step 48 that a key input of another function is determined, the process proceeds to step 52 to perform a corresponding control function.

In the case where the input of the search direction key 12c is detected within a predetermined time as a result of the determination in step 46, the microcomputer 14 sets the search direction by the search direction key 12c in step 54 up (+). The direction is determined.

Herein, a process of searching for the position 'A' in FIG. 3 while the search direction in the up (+) direction is set according to the determination in step 54 will be described as an example. If specified, the microcomputer 14 shifts the control procedure to step 56, where the half position (see position '50' in FIG. 3) and the final absolute playback time of the optical disc set in step 44 are set. A position 1/2 (see position '52' in Fig. 3) with the position (ie, the 64 minute position) is set as the current playback position, and then in step 58 it is determined whether the position is the search position (ie, the remote controller). If it is judged whether the playback key 12d of the device 12 is operated) and the operation of the playback key 12d is not detected, the flow advances to step 62, in which the search frequency n is increased by '1' and the step is increased. Return to 54.

Subsequently, when the search direction key 12c is designated in the down direction to determine the position 'A' of FIG. 3 in the state of returning to the step 54, the microcomputer 14 performs the control procedure. The flow advances to step 66, sets the position between the position '52' and the position '50' set in the above step 56 as the current playback position, and then proceeds to step 58 to complete the position search (i.e., operation of the playback key 10d). Or not).

As a result of the determination, if the position search is not completed in step 58, the control procedure is returned to the step 54 again, and the search direction key 12a is moved upward in order to search for the position 'A' in the remote control apparatus 12. The microcomputer 14 proceeds to step 56 again to adjust the position 1/2 of the position '54' set in the step 66 and the position '52' set in the previous step 54 (that is, the position 'A'). Search. Therefore, when playback is designated by the playback key 12d of the remote control device 12 at the position 'A', the microcomputer 14 cancels the location search mode in step 66 and then returns to the playback mode described in step 42. Will enter.

As described above, according to the high-speed position search control apparatus and method of the optical disk according to the present invention, the high-speed search of the playback position is executed by several operations of the search direction key in the state where the high-speed position search mode is designated, so that the playback position is searched. This simplification also simplifies the process of locating.

Claims (2)

In the optical disc reproducing apparatus for reproducing information read from the optical disc 10 at the position where the optical pickup device 22 is moved, setting the position search mode for the optical disc 10 and specifying the direction of the position search. Remote control means 10 for direction up / down control, program storage means 36 in which a control procedure programmed to set a search position for the entire reproduction time of the optical disc 10 is set every 1/2 point, Control means 14 for executing the position search while resetting 1/2 point according to the direction up / down control by performing the control procedure stored in the program storage means 36 under the position search mode set in the remote control device 12. And the control means 14 divides the total reproduction time of the optical disc 10 into half each time the search direction is set in the up (+) direction under the position search mode. A high speed position search control apparatus for an optical disc configured to perform a position search while performing a search and dividing in half with respect to the total playing time of the optical disc whenever the search direction is set in the down (-) direction. An optical disc reproducing apparatus for reading / reproducing information on an optical disc by controlling the position of an optical pickup device, wherein the search direction is set based on the total reproduction time of the optical disc in a state in which a mode for searching a reproduction position for the optical disc is set. A high speed position search control method for an optical disc, characterized in that the position search is performed by dividing the remaining play time position into 1/2 every time it is designated in the up / down direction.