KR19980061661A - Improved Time Seek Playback Method for Optical Disc Players - Google Patents

Abstract

The present invention relates to an improved time searching and reproducing method of an optical disc player, comprising: (a) reading and storing TOC (table of contents) data when a disc is loaded and waiting for key input; Determining whether or not the time search play key signal is input while executing a playback when a signal is input; otherwise, determining whether the time search play key signal is input in a key input standby state; If it is playing, it displays characters requesting the input of the time data for the desired search and playback position immediately if it is being played, and if the key is waiting for input, it executes the focus servo and rotates the disk at a speed that can read data. Displaying characters requesting entry of temporal data for the search playback position; When the input of the time data for the position is completed, the step of searching for the target position according to the input time data and including the step of performing playback from the position is configured, even if the time search playback in the key input standby state Therefore, by completing the focus servo and spindle lock states while the time data for the desired position is input from the user, the reproduction of the target position can be performed more quickly.

Description

Improved Time Seek Playback Method for Optical Disc Players

The present invention relates to a time searching and reproducing method of an optical disc player, and more particularly, to an improved optical which allows a user to input a time data of a position to be played at the same time and search for the position immediately so as to execute the playback quickly. A time searching and reproducing method of a disc player.

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.

On the other hand, the above-described optical disc player has a built-in track playback and time search playback function for convenience of use. When the user enters a track number of a track to be played on a predetermined disk, the track search is performed. In this case, when the user inputs time data of a desired position, playback is performed from that position.

In the case of time search playback, unlike track playback, in order to input time data of a desired position, a user generally inputs four digits (for example, 13:40 in 13 minutes and 40 seconds). Therefore, it takes a predetermined time. That is, first, a time search reproduction key is input, and as described above, a four-digit number must be input, so that a predetermined time is required.

However, conventionally, when the time search key signal and the time data are input during reproducing, the disk is rotating at a speed capable of reading data, that is, the spindle is locked, and the focus servo and tracking servo are achieved. When the time data input is completed, the time search reproduction can be executed immediately. However, when the time input for the time search key signal and the time data for the desired position is inputted as described above at the stop, the disk is then rotated at a predetermined speed at which data can be read and Since the pickup is moved to the desired position where the data is input, the focus servo and the tracking servo are executed, and then the playback is started. Therefore, there is a problem in that time search and playback cannot be performed quickly.

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 perform a time search play in an optical disc player, and at the time of stopping, a time for inputting time data of a position desired by the user to play. The present invention provides an improved time searching and reproducing method for an optical disc player that can execute time searching and playing more quickly.

According to a preferred embodiment of the present invention for achieving this object, there is provided an improved time searching and reproducing method of an optical disk player for searching and performing playback according to time data for a predetermined desired position input from a user. (A) reading and storing TOC (table of contents) data when the disc is loaded, and waiting for key input; and (b) executing the playback when the playback key signal is input and performing the playback. Determining whether or not a time search play key signal is input in the key input standby state; and (c) if the time search play key signal is being input, immediately at a desired search play position. Display characters requesting input of time data for Displaying characters requesting entry of time data for the desired search and playback position while rotating the disc at a data readable speed; and (d) when input of the time data for the desired position is completed. Searching for a target position according to the input time data, and performing playback from the position.

1 is a schematic block diagram of a general optical disc player for practicing the present invention.

2 is a detailed flowchart of a time searching and reproducing method of an improved optical disc player according to a preferred embodiment of the present invention.

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

10: pickup and actuator unit 20: RF signal amplification and servo signal processing unit

30: motor and motor drive unit 40: key input unit

50: microcomputer 60: digital signal processing part

70: MPEG decoder 80: Audio signal processor

90: video signal processing unit 100: speaker

110: Screen

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

1 is a schematic block diagram of an optical disc player for practicing the present invention.

As shown in FIG. 1, an optical disc player for carrying out the present invention includes a pickup and actuator unit 10, an RF (radio frequency) signal amplification and servo signal processor 20, a motor and motor driver 30, and a key input unit. 40, the 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 executes an optical pickup from a disc loaded in a disc tray (not shown), and outputs an RF signal amplified and the servo signal processor 20 to read accordingly.

In addition, the motor and the motor driving unit 30 drive a built-in spindle motor (not shown) to rotate the disk and drive the actuator unit 10 so that the pickup unit 10 performs optical pickup to record data recorded on the disk. Read and output it as an RF signal.

The RF signal amplification and servo signal processing unit 20 amplifies an RF signal provided from the pickup and actuator unit 10 and outputs it to the digital signal processing unit 60, and also outputs a servo control signal corresponding to the signal to the motor and the motor driving unit ( 30) to provide focus servo and tracking servo.

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.

Meanwhile, according to the present invention, when a disc is mounted in a disc tray, first, the microcomputer 50 generates a control signal to the motor and the motor driver 30 to load the mounted disc, and then reads the TOC data to read the internal memory ( (Not shown) and wait for keystrokes.

After that, when the reproduction key signal is input from the key input unit 40, the microcomputer 50 generates a control signal to the motor and the motor driving unit 30, the RF signal amplification and servo signal processing unit 20, and the digital signal processing unit 60. Playback is performed as described above.

When the time search playback key signal is input from the key input unit 40 during the playback, the microcomputer 50 provides the video signal processing unit 90 with prestored text data and control signals for requesting time data input. The video signal processor 90 processes the on-screen display (OSD) of the text data provided according to the control signal of the microcomputer 50 to the screen 110, and the screen 110 requests input of time data. Display characters.

Meanwhile, according to the present invention, when the time search key signal is provided from the key input unit 40 in the key input standby state, that is, the stop state, the microcomputer 50 generates a control signal to the motor and the motor driver 30 to focus. The servo and the disk are rotated at a speed at which data can be read out, that is, spindle lock is executed, and as described above, the screen 110 displays characters requiring input of time data to a desired target position.

Then, after the input of the time data for the desired target position is completed through the key input unit 40, the microcomputer 50 generates a control signal to the motor and the motor driving unit 30 to input the pickup and the actuator unit 10. To the desired position. That is, the microcomputer 50 generates control signals to the motor and the motor driver 30 by referring to the prestored TOC data and the Q data provided from the digital signal processor 60 to drive the motor and the motor driver 30. The pick-up and actuator unit 10 is transferred to the target position at which time data is input, and when the target position is reached, playback is performed from that position.

2 is a detailed flowchart of a time searching and reproducing method of an improved optical disc player according to a preferred embodiment of the present invention.

When the disc is loaded in step S10, the flow advances to step S12 to read and store TOC data and wait for key input.

Thereafter, in step S14, it is determined whether the playback key signal is input. If the playback key signal is input in step S14, the flow advances to step S16 to execute playback and then proceeds to step S18, otherwise immediately Proceed to step S18.

Then, in step S18, it is determined whether the time search key signal is input. If the time search reproduction key signal is not input in step S18, the flow is fed back, and when it is input, the flow proceeds to step S20.

When the process proceeds from step S18 to step S20, in step S20 it is determined whether the optical disc player is currently playing or in a key input standby state, that is, in a stop state. If it is determined that the stop state, and proceeds to step S22.

First, when proceeding from step S20 to step S22, in step S22, the focus servo is executed, and when the focus servo is completed, the spindle lock, that is, the disk is rotated to the data readable state again in step S24. When step S24 is completed, the process proceeds to step S26.

On the other hand, if step S20 or step S24 proceeds to step S26, step S26 displays a character requesting input of time data for a desired time search target position.

Thereafter, in step S28, it is determined whether the input of the time data for the desired position is completed. If the input of the time data is completed in step S28, the flow advances to step S30, and in step S30, After searching for the position according to the time data, playback is started from that position and the flow ends.

As described above, in the present invention, when time search reproduction is to be executed in a key input standby state, that is, in a stop state, in performing the time search reproduction in the optical disc player, time data for a desired position is input from the user. By completing the focus servo and spindle lock state during the time, the time can be inputted, and thus, the desired position can be searched and reproduced more quickly.

Claims (1)

An improved optical disc player time search playback method for searching for a location and executing playback according to time data for a predetermined desired position input from a user, the method comprising: (A) reading and storing TOC (table of contents) data when the disc is loaded and waiting for key input; (B) determining whether the time search play key signal is input while executing playback when a play key signal is input; otherwise, determining whether a time search play key signal is input in the key input standby state; (C) If the time search regeneration key signal is inputted, a character requesting input of time data for a desired search regeneration position is immediately displayed in the case of reproducing, and in the case of a key input standby state, execution of the focus servo and the disc are performed. Displaying characters requesting input of time data for a desired search and playback position while rotating at a data readable speed; (D) when inputting the time data for the desired position is completed, searching for a target position according to the input time data, and then performing playback from that position.