KR19990011992A - How to Play Playback in an Optical Disc Player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a search and playback method of an optical disc player, comprising: (a) a TOC indicating content information of data recorded on the disc from a lead-in area of the disc after loading a predetermined disc; (table of contents) reading and storing data; (B) If a result of reading the TOC data indicates that the number of tracks classified and recorded on the disc for each data content is less than or equal to a predetermined number, the play time of each track is preset for a track whose play time is larger than a preset reference play time. After dividing the sections at predetermined time intervals, assign the virtual track number to each section, store them for each track, wait for key input, and immediately press the key if the tracks classified and recorded on the disc are larger than the predetermined number. Waiting for input; (C) If the virtual track search key signal is input after the step (b), it is determined whether there is a virtual track stored in the step (b), and if the virtual track exists, the start position of the virtual track according to the input virtual track number is determined. Searching and then executing playback.

Therefore, the present invention has the effect that if the number of tracks classified and recorded on the disc for each content is less than or equal to the predetermined number, the desired contents recorded on the disc can be searched more easily and quickly.

Description

How to Play and Search for Optical Disc Players

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a search and playback method of an optical disk player, and more particularly, to an optical disk that enables searching and playing back desired data more easily and quickly when data recorded on a predetermined disk is composed of tracks of a predetermined number or less. A player's search and playback method.

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 pictures on a 12cm optical disc such as a CD, and it is designed to be compatible with current CDs and VCDs.

On the other hand, such an optical disc player is provided with various functions for convenience of use, and one of them is a search and play function that searches for a desired position and executes playback from that position. Such seek playback includes track playback for inputting a desired track number to perform playback from that track, and time search playback for inputting time data for a desired position to perform playback from that position.

However, in executing such a search and play function, in the case of a disc having a plurality of tracks classified by contents, for example, a song accompaniment disc, a track can be searched for and reproduced by using track play. Is small, i.e., when the playing time for one track is very long, especially in the case of a disc having only one track such as a movie, etc., the desired position is quickly searched using the track play as described above. You will not be able to.

In addition, as described above, in the case of a disc having a long play time for one track, time search play can be used, but in this case, the user must input multi-digit time data corresponding to the time position. For example, since the playing time for one track is long, the user cannot remember the time position at which the desired contents are recorded, and thus the user cannot quickly search for the desired position.

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 set the play time at a predetermined time interval when the play time of each track is larger than a predetermined time for a disc composed of a few tracks. The present invention provides a search and playback method for an optical disc player that allocates a virtual track and uses this to quickly search and play a desired position.

According to a preferred embodiment of the present invention for achieving the above object, in the search and reproducing method of an optical disk player for searching and playing a desired position with respect to data recorded on a predetermined disk, (a) loading a predetermined disk; Thereafter reading and storing TOC (table of contents) data representing the content information of the data recorded on the disc from a lead-in area of the disc, and (b) reading the TOC data. As a result, if the number of tracks classified and recorded on the disc by data content is less than or equal to a predetermined number, the playback time of each track is divided into predetermined time intervals for tracks whose playback time is larger than a preset reference playback time. Allocate a virtual track number to each section, store it, wait for key input, If the divided and recorded tracks are larger than a predetermined number, waiting for a key input immediately; and (c) if a virtual track search key signal is input after the step (b), whether there are any virtual tracks stored in the step (b). Determining, if a virtual track exists, searching for the start position of the virtual track according to the input virtual track number, and then executing playback.

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

2A and 2B are detailed flowcharts illustrating a search reproduction method of an optical disc player according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: Pick-up and actuator unit 20: RF signal amplification and servo signal processing unit

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

50: microcomputer 55: RAM

60: Digital signal processing unit 70: MPEG decoder

80: audio signal processor 90: video signal processor

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, microcomputer 50, memory 55, digital signal processor 60, MPEG decoder 70, audio signal processor 80, video signal processor 90, speaker 100, screen 110 It includes.

The key input unit 40 provides a function key signal for executing a predetermined function to the microcomputer 50, and the microcomputer 50 provides a control signal for executing a function according to the key signal provided from the key input unit 40. Occurs.

Then, the pickup and actuator unit 10 performs optical pickup from a disc loaded in a disc tray (not shown) at a predetermined function, for example, during reproduction, thereby amplifying the RF signal read out accordingly. Output to the servo signal processing unit 20.

On the other hand, the motor and the motor driving unit 30 drives the spindle motor (not shown) under the control of the microcomputer 50 to rotate the disk and drive the actuator unit 10 so that the pickup unit 10 performs optical pickup. Read the data recorded on the disk and output it 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 also refers to the signal to send a servo control signal for the focus and tracking servo to the motor and the motor driving unit 30. By providing a focus servo and tracking servo.

The digital signal processing unit 60 performs digital signal processing on the amplified RF signal provided from the RF signal amplification and servo signal processing unit 20 and performs error detection and error correction, and then provides the signal 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 to the video signal processor 90 and the audio signal processor 80 based on the MPEG compression format. .

The audio signal processor 80 and the video signal processor 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 transmission and an image, respectively.

On the other hand, according to the present invention, when a predetermined disk is mounted on the disk tray, the microcomputer 50 generates a control signal so that the pickup unit 10 loads the disk, and then, the motor and the motor driving unit 30. The disk is rotated by generating a control signal to drive the motor and the motor drive unit 30.

At the same time, the pickup section 10 reads the table of contents (TOC) data representing the content information of the data recorded on the disk, which is recorded in the lead-in area of the disk, and provides it to the RF signal amplifying section 20. The RF signal amplification unit 20 amplifies the signal to a predetermined level and provides it to the digital signal processor 60, and the digital signal processor 60 processes the signal and provides the signal to the microcomputer 50.

Then, the microcomputer 50 reads the TOC data processed and provided by the digital signal processing unit 60 and stores them in the memory 55. In addition, the microcomputer 50 refers to the read TOC data to determine whether there are a predetermined number, for example, three or less tracks, which are classified for each content on the disk. In the following case, the microcomputer 50 first detects tracks longer than the reference playback time by comparing the playback time of each track with reference playback by referring to the TOC data, and presets the detected tracks. The sections are divided for the playback time at predetermined time intervals, the virtual track numbers are assigned to the respective sections, and stored in the memory 55 for each track. That is, for example, if the number of tracks is three and the tracks longer than the reference playback time among the three tracks are tracks 2 and 3, the playback time of tracks 2 and 3 is set to the preset time interval. After allocating the virtual track numbers, the tracks are stored in the memory 55 together with track numbers 2 and 3, which are actual track numbers. Meanwhile, the memory 55 may be configured as a RAM 55 having a predetermined capacity.

On the other hand, after that, when the number of tracks from the read TOC data is larger than the predetermined number or the allocation and storing of the virtual tracks for each track is completed, the microcomputer 50 sends a control signal to the motor and the motor driving unit 30. It generates and switches to the standby mode by stopping the driving of the pickup and the actuator unit 10.

As described above, when the virtual track search key signal is input from the key input unit 40 after the switch to the standby mode, the microcomputer 50 reads data stored in the RAM 55 to determine whether or not a virtual track set for storage exists. At this time, if there is a virtual track, the starting position of the virtual track corresponding to the virtual track number input from the key input unit 40 is continuously read, and the pickup is generated by generating a control signal to the motor and the motor driving unit 30 accordingly. The unit 10 is driven to search for the start position of the input virtual track, and playback is performed from that position.

On the other hand, if there is no stored virtual track, the microcomputer 50 generates text data and a control signal indicating that the virtual track does not exist to the video signal processing unit 90, thereby displaying the screen through the video signal processing unit 90. In step 110, the virtual track does not exist.

2A and 2B are detailed flowcharts showing a search and playback method of an optical disc player according to a preferred embodiment of the present invention.

In step S10, the disc loaded in the disc tray is loaded, and in step S20, the TOC data recorded in the lead-in area of the loaded disc is read out and stored in the memory 55.

Thereafter, in step S30, the microcomputer 50 determines whether or not the tracks classified and recorded on the disc according to the contents on the disc are preset or less than a predetermined number, with reference to the stored TOC data. If the process proceeds to step S40, otherwise proceeds to step S100.

When the process proceeds from step S30 to step S40, in step S40, the total number of tracks and the respective track numbers are read and recognized with reference to the read TOC data, and then in steps S50 to S90, respectively. By comparing the playing time of the track with the preset reference time, tracks with a playing time larger than the reference time are divided into sections at predetermined time intervals, assigning track numbers to each section, and then storing the memory with the original track number. 55).

In other words, in step S40, the total number of tracks M is recognized and set, the track number C is set to 1, and the flow advances to step S50. Then, in step S50, it is determined whether the playback time of track 1 is greater than the reference time. If the reference time of track 1 is greater than the reference time T, the process proceeds to step S60; Proceed to S80).

When the process proceeds from the step S50 to the step S60, in step S60, the track 1 is divided at predetermined time intervals, and in step S70, the virtual track number is assigned to the RAM 55 with the original track number. ), And proceeds to step S80 to increase the track number (C) by '1'.

Thereafter, in step S90, the track number increased by '1' in step S80 is compared with the total number of tracks M, which will match the last track number, where track number C is the total number. If it is larger than the number M of tracks, the flow advances to step S100, and if the number is smaller than or equal to the track M, the flow returns to step S50 to repeat the flow. That is, if the total number of tracks M is 3, the steps S50 to S90 will be repeated until the track number C is three.

Meanwhile, when steps S50 to S90 are completed and the process proceeds to step S100, the process switches to the standby mode and waits for a key input in step S100.

Thereafter, in step S110, it is determined whether a virtual track search key signal is input. If in step S110 a virtual track search key signal is input, the process proceeds to step S120 to determine whether a virtual track exists. If there is a virtual track in S120, the process proceeds to step S130, and if not, the process proceeds to step S170.

First, when the process proceeds from step S120 to step S130, it is determined whether the virtual track number to be searched for is input in step S130. If the virtual track number is input in step S130, the process proceeds to step S140. After reading time data on the start position of the input virtual track stored in the memory 55, the start position of the input virtual track is searched. When the start position search of the virtual track input in step S150 is completed, the flow advances to step S160 to execute playback from that position, and when step S160 is completed, the flow returns.

On the other hand, if the process proceeds from step S120 to step S170, in step S170 displays that the virtual track does not exist for a predetermined time, and then returns to step 9S110 to perform the flow again.

As described above, the present invention has an effect that the desired contents recorded on the disk can be searched and reproduced more easily and quickly by allocating virtual tracks when the number of tracks classified and recorded on the disk according to the contents is less than or equal to a predetermined number.

Claims (2)

A search and playback method of an optical disk player for searching for and playing back a desired position with respect to data recorded on a predetermined disk, (A) reading and storing TOC (table of contents) data representing content information of data recorded on the disc from a lead-in area of the disc after loading a predetermined disc; (B) If a result of reading the TOC data indicates that the number of tracks classified and recorded on the disc for each data content is less than or equal to a predetermined number, the play time of each track is preset for a track whose play time is larger than a preset reference play time. After dividing the sections at predetermined time intervals, assign the virtual track number to each section, store them, and wait for key input. If the tracks classified and recorded by data contents on the disk are larger than the predetermined number, the key input is immediately performed. Waiting; (C) If the virtual track search key signal is input after the step (b), it is determined whether there is a virtual track stored in the step (b), and if the virtual track exists, the start position of the virtual track according to the input virtual track number is determined. A search and playback method of an optical disc player, comprising the step of performing playback after searching. 2. The search and playback method of an optical disc player according to claim 1, further comprising the step of displaying, as a character, that there is no virtual track if there is no virtual track in the step (c).