KR20000034390A - Reproduction method of a combined cd/vcd reproducing system - Google Patents

Abstract

PURPOSE: A reproduction method of a combined CD/VCD reproducing system is provided to store a desired screen of a frame unit to a picture memory at reproducing a video compact disk, and then display the stored screen according a user's request at reproducing a compact disk. CONSTITUTION: In a reproduction method of a combined CD/VCD reproducing system, a micro computer judges whether a present loaded disk is a CD or a VCD according to stored TOC data (S106). If the loaded disk is judged as the VCD(S110), the loaded VCD is reproduced(S112). The micro computer judges whether a screen skip storage key signal is applied from a key input part(S114). If the storage key signal is applied, the micro computer skips a presently reproduced VCD screen by a frame unit, and stores a screen to a picture memory(S114). The micro computer judges whether a storage end signal is applied through the key input part(S118). If so, the storage operation is ended. In a case where the loaded disk is judged as the CD, the CD is reproduced(S122). The micro computer judges whether a picture reproduction key signal is applied from the key input part(S124). If so, the micro computer searches the picture memory, and judges whether image data is stored in the searched picture memory(S128). If so, a video signal processing part is controlled so as to reproduce and output the image data (S130).

Description

How to Play a Compact Disc / Video Compact Disc Playback System

The present invention relates to a reproducing method of a CD / Video Compact Disk (VCD) combined playback system. In particular, the present invention relates to a CD / VCD combined display for storing a desired screen during VCD playback and displaying the stored screen during CD playback. A reproducing method of a reproducing system.

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) video compact disk player (VCDP). compact disk player, etc. have been developed and widely used, and recently, digital video disks (DVD) using moving picture compression technology of MPEG-2 and digital video disk players for playing them have been developed. It is possible to record and play back gigabytes (GB) of data including moving images in an optical disc of 12 cm, and it is also made to be compatible to play not only current CDs but also VCDs.

Among such optical disc players, a CD / VCD combined playback system that combines a compact disc player and a video compact disc player has recently been widely used and widely used.

However, such a CD / VCD playback system has been limited in terms of its function. In other words, the video and audio can be viewed together during VCD playback, but only the audio can be heard during CD playback.

Accordingly, the present invention has been made to solve such a problem, and the CD / VCD combined playback for storing a desired screen in picture memory on a frame-by-frame basis during VCD playback, and then displaying the stored screen upon CD playback according to a user's request. It is an object of the present invention to provide a method of regenerating a system.

In order to achieve the above object, the present invention provides a CD / VCD combined playback system for simultaneously playing a CD in which audio information is recorded and a VCD in which audio and video information are recorded. During playback of video information, whenever a skip storage key signal is input to the dual playback system, storing the corresponding playback video information frame by frame in the internal memory of the CD / VCD combined system; The present invention provides a method for reproducing a CD / VCD combined playback system including sequentially reproducing video information of a frame unit.

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

2 is a flowchart illustrating a playback process of a CD / VCD combined playback system according to a preferred embodiment of the present invention.

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

10: CD / VCD player section 20: key input section

30: microcomputer 32: TOC memory

34: picture memory 40: audio signal processor

50: speaker 60: video signal processing unit

70: OSD

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 CD / VCD combined playback system for carrying out the present invention, which includes a CD / VCD player unit 10, a key input unit 20, a microcomputer 30, a TOC memory 32, a picture memory 34, and audio. The signal processor 40, a speaker 50, a video signal processor 60, and an OSD 70 are included.

As shown, the CD / VCD player unit 10 performs an optical pickup from a disc loaded in a disc tray (not shown), amplifies and outputs the RF signal read therefrom, and processes the amplified RF signal in a digital signal. Error detection and error correction. In addition, the CD / VCD player unit 10 selectively performs MPEG processing depending on whether the loaded disc is a CD or a VCD.

That is, when the loaded disc is a CD, the signal read out from the CD is directly provided to the audio signal processing unit 40 without going through the MPEG process. When the loaded disc is a VCD, the signal read out from the VCD is a CD / VCD player. The digital video signal and the audio signal error corrected by the MPEG decoder (not shown) in the unit 10 are decoded based on the MPEG compression format and then output to the video signal processing unit 60.

The audio signal processor 40 processes the audio signal provided from the CD / VCD player unit 10 into a voice output signal and provides the same to the speaker 50. Thus, a predetermined voice signal is output through the speaker 50.

The video signal processing unit 60 provides the decoded video signal provided from the CD / VCD player unit 10 to the OSD 70, and the OSD 70 processes the video signal into a displayable signal and omits the monitor shown. To provide. Thus, the predetermined image is displayed through the monitor.

On the other hand, when a reproduction key signal is input from the key input unit 20, the microcomputer 30 generates a control signal to the CD / VCD player unit 10 by referring to the table of content (TOC) data stored in the TOC memory 32. Allows playback to be performed on the loaded disc. That is, when a predetermined disk is mounted in the CD / VCD playback system, the microcomputer 30 reads the TOC recorded in the lead-in area of the mounted disk, and reads the read TOC into the TOC memory 32. It stores the data, and selectively drives the CD / VCD combined playback system with reference to the stored TOC data.

On the other hand, the picture memory 34 stores a predetermined image frame by frame based on the screen skip storage control signal of the microcomputer 30 during VCD playback. The image data stored in the picture memory 34 is then read by the microcomputer 30 in accordance with the picture reproduction key signal from the key input unit 20 described above.

Along with the above-described configuration, a detailed description will be given with reference to the flowchart of FIG. 2 to which the reproduction process of the combined CD / VCD playback system according to the present invention is attached.

First, when a predetermined disk is mounted in the VCD system in step S100, the microcomputer 30 proceeds to step S102 to read a TOC from the mounted disk. The TOC contains disc discrimination data, that is, data for determining whether a mounted disc is a CD or a VCD. The microcomputer 30 refers to these data to perform CD and / or VCD control described later. .

On the other hand, in step S104, the microcomputer 30 stores the read TOC data in the TOC memory 32 and waits.

At this time, when a play key signal is applied from the key input unit 20, the microcomputer 30 proceeds to step S106 to generate a control signal to the CD / VCD player unit 10 so that playback of the loaded disc is performed. Then, the process proceeds to step S106.

In step S106, the microcomputer 30 reads the stored TOC data from the TOC memory 32 to determine whether the currently loaded disk is a CD or a VCD. That is, the TOC data for distinguishing a CD or a VCD is stored in the TOC memory 32. The TOC memory 32 reads out the data and determines a mode to be performed in the future.

If the determination result of step S106 is found to be VCD (S110), the microcomputer 30 proceeds to step S112 to reproduce the mounted VCD to control the video output, and to proceed to step S114.

In operation S114, the microcomputer 30 determines whether the screen skip storage key signal is applied from the key input unit 20 described above. The screen skip storage key signal is a key signal output from a key button (for example, a still button) formed on a keypad or a remote controller, not shown, and is used for skipping and storing a desired screen while a user watches a VCD. It is a key signal.

That is, when the screen skip storage key signal is applied as a result of the determination in step S114, the microcomputer 30 proceeds to step S116 and skips the currently displayed VCD screen in frame units while storing the picture in the picture memory 34. will be.

At this time, the microcomputer 30 proceeds to step S118 to determine whether the storage end key signal is applied from the above-described key input unit 20. As a result of the determination in step S118, when the storage end key signal is applied, the microcomputer 30 proceeds to step S120 to end the storage.

On the other hand, if the determination result of step S106 is determined to be a CD (S108), the microcomputer 30 proceeds to step S122 to play the CD to control audio output, and to proceed to step S124.

In step S124, the microcomputer 30 determines whether the picture reproduction key signal is applied from the above-described key input unit 10. As described above, the picture reproduction key signal is a key signal output from a key pad or a key button formed on a remote controller (not shown), for example, a reproduction button, and a key signal for viewing a desired screen while a user listens to a CD. to be.

When the picture reproduction key signal is applied as a result of the determination in step S124 described above, the microcomputer 30 proceeds to step S126 to search for the picture memory 34 and proceeds to step S128.

In operation S128, the microcomputer 30 determines whether predetermined image data is stored in the retrieved picture memory 34. That is, it is determined whether the predetermined video data at the time of viewing the VCD set by the above-described screen skip storage key signal is stored in the picture memory 34.

As a result of the determination in step S128, if it is determined that the predetermined image data is stored in the picture memory 34, the microcomputer 30 proceeds to step S130 to instruct the video signal processor 60 to reproduce the image data. Control to output a predetermined image.

If it is determined in step S128 that the predetermined image data is not stored in the picture memory 34, the microcomputer 30 proceeds to step S132 to indicate that the image data is not stored. OSD processing to display a text, for example, the text "No saved screen" (pre-stored in the OSD) through the OSD 70, and ends step S132.

As described above, the present invention can provide various functionalities of the CD / VCD combined playback system by allowing the user to watch a desired screen even during CD playback.

Claims (1)

In the playback method of a CD / VCD combined playback system that plays back a CD containing audio information and a VCD containing audio and video information, During playback of the audio and video information of the VCD, whenever a skip storage key signal is input to the dual playback system, storing the corresponding playback video information frame by frame in the internal memory of the dual CD / VCD system; ; Sequentially playing the stored video information in the unit of frame when playing the CD; And displaying the OSD information on the OSD screen when the video information is not stored in the internal memory.