KR20000028453A - Time search reproducing method for video cd system - Google Patents

Abstract

PURPOSE: A time search reproducing method for video CD system is provided to conveniently see only a specific information region by selectively reproducing the specific information region using a Q data of a video CD. CONSTITUTION: A video CD player reads a TOC recorded in a read-in region of a disk, corrects an error, and provides the corrected TOC to a control unit when the disk is mounted on a video CD system(S1). The control unit stores TOC information provided from the video CD player to a memory to stand by(S2). The control unit controls a reproduction of the video CD player based on the TOC stored in the memory when a signal of a reproducing key is provided to the control unit(S3,S4). The control unit searches an inner memory and discriminates as to whether a first Q data for indicating a specific position on the disk is stored when a signal of a position memory key is inputted to the control unit(S5-S7). The Q data provided from the video CD player(200) is stored as the first Q data to the inner memory when the first Q data is stored(S8). It is judged as to whether a second Q data is stored(S9). The Q data provided from the video CD player is stored as a the second Q data to the inner memory(S10).

Description

How to Play Time Search on Video CD System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time search reproduction method of a video CD system that can selectively reproduce a specific information region using Q data in a video CD system.

In general, video CD is a non-contact playback of video / audio data recorded by MPEG-1 recording method by a laser, it provides a resolution of 325 * 240, such as video tape (VHS), the screen format is about 30 frames per second . Such video CDs can be divided into learning video CDs, movie video CDs, and karaoke video CDs according to their functions and uses.

Referring to FIG. 1, a video CD typically consists of a program area, a read in area, and a read out area.

The program area is located between the innermost and outermost parts of the video CD. The program area contains one or more programs in track units.

The lead-in area is located on the innermost periphery of the video CD, and control information necessary for reproducing each program recorded in the program area is created and recorded in a TOC (Table Of Content). The lead-out area is located at the outermost periphery of the video CD and contains information related to the end of the program area.

For example, in the case of a karaoke video CD, audio data corresponding to a plurality of songs and video data corresponding to a background screen suitable for each song are stored in the program area. In this case, the program area has a track number corresponding to a plurality of songs, and audio data and video data corresponding to each song are stored for each track.

In the lead-in area, start time and end time, total number of songs, total reproduction time of the program area, etc., for each of the songs contained in the program area are written and recorded in TOC (Table Of Content). The lead-out area also contains information for stopping further playback after the last track of the program area is completed.

On the other hand, since a movie video CD has a very long movie program, the entire movie scene cannot be recorded on one video CD, and one movie program is generally stored on two video CDs. Therefore, in the case of a movie video CD, only one track exists in the program area, and information about the track is stored in the lead-in area and the lead-out area.

In such a video CD, when the user selects a predetermined program, the video CD player reads the TOC contained in the lead-in area of the video CD, and then detects the start time and end time of the selected program from the TOC. Then, based on the start time and end time of the selected program, the position on the disk where the program is stored is determined, and the program is read out from the position to execute program playback.

However, in the TOC of the video CD, as described above, there is only information about the start time and the end time for each track, and there is no information about a specific position in one track. Therefore, in the conventional case, it is very difficult to select and reproduce only information on a specific area in one track.

In particular, in the case of a movie video CD, since the entire program area consists of one track, in order to selectively play a specific area, scanning starts from the beginning of the program area of the video CD, and when the start point of the specific area is reached, It was very inconvenient to use because it allows normal playback from the location.

Accordingly, the present invention is to solve the above-described problems of the prior art, by using the subdata of the video CD to determine the start point and end point of the specific information area, and to selectively reproduce the specific information area. An object of the present invention is to provide a time search reproduction method of a video CD system.

In order to achieve the above object, the present invention relates to a time search reproduction method of a video CD system that reads and reproduces programs recorded on a disc composed of one or more tracks and Q data recorded at predetermined intervals on the tracks. (A) playing a program recorded on the disc; (B) determining, during the reproduction, the designated time search reproduction section on the basis of the Q data if a time search reproduction section on the disc is designated; (C) reproducing the determined time search reproduction section.

1 is a general structural diagram of a video CD of the present invention;

2 is a configuration diagram of a video CD system for performing a time search reproducing method of the present invention;

3 is a detailed flowchart illustrating a time search reproduction method according to an embodiment of the present invention.

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

100: disc 200: video CD player

300: control unit 400: memory

500: key input unit 600: OSD unit

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

2 shows a video CD system for performing the time search reproducing method of the present invention. In FIG. 2, the video CD system includes a disc 100, a video CD player 200, a controller 300, a memory 400, a key input unit 500, and an OSD (On Screen Display) unit 600.

As illustrated in FIG. 1, the disc 100 includes a lead-in area, a program area, and a lead-out area, in which one or more programs are stored. In addition, each program includes video data, audio data, and sub data, and in particular, the sub data includes Q data recorded at regular intervals on the track of the disc 100. Here, the Q data substantially represents time data, and is mainly used as servo data for rotating the disk 100 to constant liner velocity (CLV).

The video CD player 200 reads out data stored on the disc 100, corrects an error, and provides control information such as TOC information or sub data to the control unit 300, and the video / audio data on the program area is MPEG decoding process to output.

The control unit 300 stores the TOC information provided from the video CD player 200 in the memory 400, and when a key signal is input from the key input unit 500, the controller 300 based on the TOC stored in the memory 400. The control unit 200 performs an operation corresponding to the key signal. In addition, the controller 300 provides a control signal to the video CD player 200 to control the disc 100 to rotate in the CLV with reference to the Q data included in the sub data provided from the video CD player 200. The time search reproduction according to the present invention is controlled using the data, so that the reproduction of a specific area on the disc 100 is performed.

The key input unit 500 provides various user key signals to the control unit 300 and includes a key signal for selectively reproducing a specific information area on the disc 100.

The OSD unit 600 is for displaying various operation states of the video CD player 200 on the OSD screen and is controlled by the controller 300.

3 is a detailed flowchart illustrating a time search reproduction method according to an embodiment of the present invention. The time search reproduction method of FIG. 3 is substantially performed using the video CD system of FIG. Therefore, the time search reproduction method of the present invention will be described below with reference to FIGS. 2 and 3.

When the disc 100 is mounted in the video CD system (S1), the video CD player 200 reads out the TOC recorded in the lead-in area of the disc 100, corrects the error, and provides the error correction to the controller 300. The controller 300 stores the TOC information provided from the video CD player 200 in the memory 400 and waits (S2).

When the user provides the play key signal to the control unit 300 using the key input unit 500 (S3), the control unit 300 performs playback of the video CD player 200 based on the TOC stored in the memory 400. Control (S4). Here, the playback key signal may be a key signal for designating a program recorded in the front track among a plurality of programs recorded in the program area of the disk 100 or a key signal for designating a specific program.

The video CD player 200 is switched to the normal playback mode under the control of the control unit 300, and then reads the designated program among the programs recorded on the disc 100. The video CD player 200 corrects the read program and provides sub data included in the program to the controller 300, while MPEG video processing of the video / audio data is performed. The video data is output through the OSD unit 600.

The control unit 300 provides the video CD player 200 with a control signal for controlling the disk 100 to rotate to CLV based on the Q data included in the sub data provided from the video CD player 200. In response, the player 200 rotates the disc 100 to CLV and plays the data contained in the disc 100.

During the normal play mode operation, when the user inputs the position memory key signal to the control unit 300 using the key input unit 500 (S5), the control unit 300 searches the internal memory (S6) and the disk ( It is determined whether the first Q data indicating the specific position on 100 is stored (S7). If the first Q data is not stored, the Q data provided from the video CD player 200 is stored in the internal memory as the first Q data (S8). If the first Q data is stored as a result of the search in step S6, it is determined whether the second Q data is stored (S9). If the second Q data is not stored, the Q data provided from the video CD player 200 is stored. The data is stored in the internal memory as second Q data (S10).

However, if the second Q data is stored as a result of the determination, the controller 300 controls the OSD unit 600 to allow the user to know such a situation (S11). Under the control of the controller 300, the OSD unit 600 displays a screen indicating that the time search reproduction section is known, and outputs it to the display side not shown in the figure.

On the other hand, when the user inputs the time search reproducing key signal to the controller 300 using the key input unit 500 after the process S5 (S12), the controller 300 searches for the internal memory in response thereto (S13). It is determined whether the first Q data and the second Q data are stored (S14).

As a result of the search, if the first Q data, the second Q data, or the second Q data are not stored in the internal memory, the controller 300 controls the OSD unit 600 to allow the user to know such a situation (S15). ). Under the control of the control unit 300, the OSD unit 600 displays a screen indicating that the time search reproduction section is not designated by the OSD and outputs it to the display side not shown in the figure. In this case, when the first Q data is stored in the internal memory but the second Q data is not stored, the OSD screen displays that the end point of the time search playback section is not specified, thereby providing a more reliable situation to the user. Recognition is desirable.

As a result of the search in step S13, when the first Q data and the second Q data are stored in the internal memory, the control unit 300 searches for the position of the video CD player to search the position on the disc 100 in which the first Q data is stored. 200 is controlled (S16). The video CD player 200 searches for the position on the disc 100 in which the first Q data is stored under the control of the control unit 300.

When the starting point of the time search playback section, that is, the position on the disk 100 in which the first Q data is stored (S17) is searched (S17), the controller 300 controls the video CD player 200 to start playback from the corresponding position. (S18). The video CD player 200 reads a program of a time search reproduction section under the control of the control unit 300, outputs an error correction and MPEG decoding process. After the playback is completed to the end point of the time search playback section, that is, the position on the disk 100 corresponding to the second Q data by the above process (S19), the controller 300 controls the video CD player 200. The playback operation is stopped, whereby the video CD player 200 ends playback of the time search playback section.

As described above, the present invention makes it possible to selectively reproduce a specific information area that cannot be solved only by TOC information using Q data of a video CD, so that only a specific information area can be enjoyed more conveniently.

Claims (2)

In a time search reproducing method of a video CD system for reading and playing programs recorded on a disc consisting of one or more tracks and Q data recorded at predetermined intervals on the tracks: (A) playing a program recorded on the disc; (B) if the time search playback section on the disc is designated during the playback, determining the designated time search playback section based on the Q data, wherein the Q data is time data; (C) reproducing the determined time search reproducing section. The method of claim 1, wherein step (B) comprises: Reading and storing the first Q data recorded at the starting point on the disc, if a starting point of the time search play section is designated; B) if an end point of the time search playback section is designated, reading and storing second Q data recorded at the end point on the disc; A search method of a time search of a video CD system, comprising: searching for a position on a disc in which the first Q data and the second Q data are recorded.