KR20000034389A - Method for auto-turning osd of vcd system - Google Patents

Abstract

PURPOSE: A method for auto turning OSD of VCD system provides convenience in use by auto-turning OSD character to English or Chinese according to a data which is recorded in a disk and discriminates NTSC or PAL mode. CONSTITUTION: A method for auto-turning OSD of VCD system, in which audio/video information recorded in VCD are played back in NTSC or PAL mode and NTSC mode is selected by a first country and PAL mode is selected by a second country, is disclosed. If the VCD system is turned to OSD mode during playing back VCD in NTSC mode(S112), OSD screen is displayed by a language of the first country(S114). If the VCD system is turned to OSD mode during playing back VCD in PAL mode(S116), OSD screen is displayed by a language of the second country(S118).

Description

OSD automatic switching method of VCD system

The present invention relates to the automatic switching of the OSD (On Screen Display) screen of the VCD (Video Compact Disk) system, in particular, OSD of the VCD system to adaptively switch the OSD according to the NTSC or PAL mode discrimination data contained on the disk It is about a switching method.

With the development of audio and video media, optical disc players have been developed that record video and audio data on semi-permanent discs and reproduce them using light.

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 And / or have a number of advantages, including the ability to reproduce signals in sound quality, no noise from irregular playback and modulation, very little distortion, no ghosts and random access, There is a trend.

In addition, such an optical disk player includes a compact disk player (CDP), a laser disk player (LDP), and a compact disk graphics player (CDGP) VCD player (VCDP). disk players, etc. have been developed and widely used. Recently, digital video disks (DVD) using MPEG-2 moving picture compression technology and digital video disk players for playing them have been developed. In the same 12cm optical disc, gigabytes (GB) of data including moving images can be recorded and reproduced, and the present CD and VCD can be reproduced to be compatible.

On the other hand, among these optical disc players, the VCD player, ie, VCDP, has an added function for convenience of use. Among these functions, the OSD screen switching function is displayed through the OSD while playing a predetermined optical disc. This function allows you to change the current OSD characters according to the user's intention.Use the displayed English OSD characters (for NTSC discs) or Chinese OSD characters (for PAL discs). This function can be selected.

However, this OSD screen switching function has a cumbersome problem that the user has to change using the language key on the remote control as needed.

Accordingly, an object of the present invention is to provide an OSD automatic switching method of a VCD system that automatically switches OSD characters to English or Chinese according to NTSC or PAL mode discrimination data contained on a disk. There is this.

In order to achieve the above object, the present invention is to reproduce the audio / video information contained in the VCD by NTSC or PAL method, NTSC method is adopted by the first country, PAL method is adopted by the second country In the OSD automatic switching method of the conventional VCD system, if the VCD system is switched to the OSD mode while playing the VCD in the NTSC mode, displaying the OSD screen in the language of the first country, and during the PAL method of playing the VCD When the VCD system is switched to the OSD mode, it provides an OSD automatic switching method of the VCD system including the step of displaying the OSD screen in the language of the second country.

1 is a schematic block diagram of a VCD system for carrying out the present invention;

2 is a flowchart of a process of automatically switching an OSD according to mode data detected in a VCD system 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 drive unit 40: key input unit

50: microcomputer 52: memory unit

60: DSP 70: MPEG decoder

80: OSD 90: audio signal processing unit

100: speaker

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

1 is a VCD system for implementing the present invention, the pickup and actuator unit 10, the RF signal amplification and servo signal processing unit 20, the motor driver 30, the key input unit 40, the microcomputer 50, memory 52, the DSP 60, the MPEG decoder 70, the OSD 80, the audio signal processor 90, and the speaker 100.

As shown in the drawing, the pickup and actuator unit 10 performs an optical pickup from a disc loaded in a disc tray (not shown) and outputs an RF signal read accordingly.

In addition, the motor driving unit 30 drives a spindle motor (not shown) to rotate the disk and drives the actuator unit 10 so that the pickup unit 10 performs optical pickup to read data written on the disk to RF. Output as a signal.

The RF signal amplification and servo signal processing unit 20 amplifies and outputs the RF signal provided from the pickup and actuator unit 10.

The DSP 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 DSP 60 based on the MPEG compression format and outputs the decoded signal to the OSD 80 and the audio signal processor 90.

The OSD 80 and the audio 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 monitor (not shown), respectively, and thus the speaker 100 The voice and the monitor are respectively output as audio or displayed as an image.

On the other hand, when a reproduction key signal (not shown) is input from the key input unit 40, the microcomputer 50 refers to the table of content (TOC) data stored in the memory 52 and picks up the actuator unit 10 and amplifies the RF signal. And by generating control signals to the servo signal processing unit 20, the motor driving unit 30, and the DSP 60, the reproduction of the loaded disc is performed. That is, when a predetermined disk is mounted in the VCD system, the microcomputer 50 reads the TOC recorded in the lead-in area of the mounted disk, and stores the read TOC in the memory 52.

If the OSD screen request signal for displaying the OSD screen is provided from the key input unit 40 while the playback is performed through this process, the microcomputer 50 may refer to the TOC data stored in the memory 52 to display the OSD 80. Drive selectively

An optional OSD automatic switching process of the microcomputer 50 will be described in detail with reference to the flowchart of FIG. 2.

Prior to the description, the processes of FIG. 2 according to the present invention are configured to be performed assuming that English OSD screen data and Chinese OSD screen data are pre-stored in a memory not shown in the OSD 80.

First, when a predetermined disk is mounted in the VCD system in step S100, the microcomputer 50 proceeds to step S102 to read a TOC from the mounted disk. The TOC contains mode discrimination data applied to the present embodiment, that is, data for determining whether the mounted disk is an NTSC mode or a PAL mode. 80) to perform control.

On the other hand, in step S104, the microcomputer 50 stores the read TOC in the memory 52 and proceeds to step S106.

In step S106, the microcomputer 50 determines whether an OSD screen request signal is applied. The OSD screen request signal is provided as various function key signals applied from the key input unit 40, for example, a reproduction key signal.

As a result of the determination in step S106, when the OSD screen request signal is applied, that is, when a predetermined function key signal is applied, the microcomputer 50 switches the current mode to the OSD mode and proceeds to step S108.

In step S108, the microcomputer 50 detects mode data from the TOC stored in the memory 52 and proceeds to step S110.

After determining the detected mode data in step S110, the microcomputer 50 proceeds to step S112 to determine whether the determined mode data is NTSC or PAL. In other words, data for distinguishing the NTSC system or the PAL system is stored in the TOC. The data is read to determine the mode.

As a result of the determination in step S112, if it is determined that the determined mode data is NTSC, the microcomputer 50 proceeds to step S114 to read English OSD screen data stored in a memory (not shown) in the OSD 80. By providing a display control signal to the OSD 80 for displaying this English OSD screen data on the monitor, the English characters are displayed on the monitor.

On the other hand, if it is determined in step S112 that the determined mode data is not the NTSC method, the microcomputer 50 proceeds to step S116 to determine whether the determined mode data is the PAL method.

As a result of the determination in step S116, if the determined mode data is determined to be the PAL method, the microcomputer 50 proceeds to step S118 to read Chinese OSD screen data stored in a memory (not shown) in the OSD 80. By providing a display control signal to the OSD 80 for displaying this Chinese OSD screen data on the monitor, Chinese characters are displayed on the monitor.

As described above, the present invention has the effect of facilitating the convenience of use by automatically switching the OSD screen according to the NTSC or PAL mode at the time of playing the VCD system.

Claims (1)

Reproducing audio / video information contained in a VCD in NTSC or PAL method, wherein the NTSC method is adopted by the first country, and the PAL method is used for the OSD automatic switching method of the VCD system adopted by the second country. In Displaying the OSD screen in a language of the first country if the VCD system is switched to an OSD mode while playing the VCD in the NTSC mode; And displaying the OSD screen in a language of the second country when the VCD system is switched to an OSD mode while playing the VCD in the PAL manner.