KR19980079024A - How to select background music when playing video on a video compact disc system - Google Patents

Abstract

The present invention provides a video compact disc system of a video compact disc system that outputs a background music corresponding to a menu screen or a slide of a VCD in a video CD player using a PC CD-ROM. A method of selecting background music during playback, the method comprising: a first step of storing change setting information in response to a background music change key signal for setting a background music change corresponding to a menu screen; A second step of detecting whether the background music is changed by reading the stored setting information when a key signal for displaying a screen is input; if the change of the background music is set from the detected information, A third step of reproducing the CD-ROM drive of the PC after the audio output of the video compact disc player is cut off, outputting an audio signal reproduced from the CD-ROM drive, and displaying a menu screen recorded on the video CD; A fourth step is included.

Description

P.C. on the Video Compact Disc System. How to select background music during playback

The present invention relates to a video compact disc system, and more particularly, to a method for selecting background music during PBC playback of a video CD.

In general, a video CD has a PBC function that allows a user to perform playback at a track position containing information desired by a user by using a menu screen that introduces and selects the contents of information recorded on the disc when the disc is played. .

For this PBC function, track information of a video CD disc contains menu information. In general, such menu information has a hierarchical tree structure. That is, the menu information is composed of an upper menu composed of a plurality of items for selection, and lower menus which are further classified into respective items of the upper menu.

Therefore, when a user selects a certain item from among a plurality of items in the upper menu, the user proceeds to a lower menu corresponding to the selected item through a predetermined path, and when a user selects a certain item among items included in the lower menu, the predetermined path is set. Proceed to the lower menu corresponding to the selected item.

The lowermost menu without any submenu contains the address of the track containing the information corresponding to the menu item. When a certain item of the lowermost menu is selected, the corresponding track is referred to by referring to the address of the track containing the information corresponding to the selected item. Play it.

1 is a general structural diagram of a general optical disk, which will be described with reference to the same drawing as follows.

In general, an optical disc has a read in area 1A in which information about a program is recorded in a table of contents (TOC), a program area 1B, and an end of a program as shown in FIG. It can be divided into a read out area 1C in which information is recorded.

In the case of a video CD disc, a data area is allocated to the program area 1B.

FIG. 2 is a structural diagram of a data area of a video compact disc version disc, and a configuration diagram of the data area is shown. In the figure, the data area of the disc is divided into a Primary Volume Descriptor (PVD) area 2A, a Basic (Karaoke) information area 2B, a Video CD information area 2C, a SPI (Segment Play Item) area 2D, It consists of a CDI application (CD Interactive application) area 2E.

Subsequently, a menu screen for the PBC function is recorded and displayed in the SPI area (2D). The types of such menu screens include a menu screen consisting of a still screen and a menu screen in a slide form. Contains still images and audio data.

Therefore, while the slide menu screen is displayed, audio data corresponding to each still screen is output to provide the user with the menu screen along with the background music, which is recorded on the disc. You can't change it, and only the same background music is output.

Accordingly, the present invention has been devised in view of the above, by connecting a VCD player to a CD-ROM drive of a personal computer (PC), the user can freely select different background music when playing a menu screen or slide of a VCD. P.C. on the Video Compact Disc System. Its purpose is to provide a background music selection method during playback.

In order to achieve the above object, the present invention provides a first step of storing change setting information in response to a background music change key signal for setting a background music change corresponding to a menu screen, during the normal playback of the video CD. A second step of detecting whether the background music is changed by reading the stored setting information when a key signal for displaying a screen is input; if the change of the background music is set from the detected information, A third step of reproducing the CD-ROM drive of the PC after the audio output of the video compact disc player is cut off, outputting an audio signal reproduced from the CD-ROM drive, and displaying a menu screen recorded on the video CD; The video compact disc system of the video compact disc system including the fourth step. Provides a way to select background music during playback.

1 is an overall structural diagram of a typical optical disk,

2 is a structural diagram of a data area of a video compact disc version disc;

3 is a block diagram of a video compact system suitable for applying a background music selection method in a video compact disc system according to the present invention;

4 is a flowchart showing a background music selection process in a video compact disc system according to a preferred embodiment of the present invention.

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

5 disc 10 optical pickup section

15: key input unit 20: digital signal processing unit

25: Micom 30: MPEG decoder

35: audio signal processor 40: video signal processor

45 monitor 50 switching unit

55: speaker 60: CPU

70: CD-ROM drive

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.

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

3 is a block diagram of a video compact system suitable for applying a background music selection method in a video compact disc system according to the present invention, which includes a disc 5, a video CD player 100, and a PC side 200. As shown in FIG. The video CD player 100 may include an optical pickup unit 10, a key input unit 15, a digital signal processor 20, a microcomputer 25, an MPEG decoder 30, an audio signal processor 35, and a video signal processor. 40, the monitor 45, the switching unit 50, the speaker 55, the PC side 200 is composed of a CPU (60) and a CD-ROM drive (70).

First, referring to the main functions of the respective components provided in the video CD player 100, the optical pickup section 10 is based on the control signal for the optical pickup from the microcomputer 40, the optical signal to the disk (5) The pickup is performed to read the RF signal.

The RF signal thus read is provided to the digital signal processor 20, and the digital signal processor 20 outputs the RF signal to the MPEG decoder 30 after digital signal processing, error detection and correction.

The MPEG decoder 30 decodes an error corrected digital video signal and an audio signal provided from the digital signal processor 20 based on the MPEG compression format and outputs the decoded audio signal to the audio signal processor 35 and the video signal processor 40. .

The audio signal processor 35 and the video signal processor 40 provide the decoded audio and video signals provided from the MPEG decoder 30 to the switching unit 50 and the monitor 45, respectively.

The PC side 200 is composed of a CPU 60 that processes the overall operation of the PC and processes data and a CD-ROM drive 70 capable of playing an optical disc.

The CD-ROM drive 70 described above includes an optical pickup unit, a digital signal processor, an MPEG decoder, an audio signal processor, and the like, such as a video CD player. The audio disc playback in the ROM drive is automatically performed continuously after the playback of one track (song).

On the other hand, the switching unit 50 is provided from the audio signal processing unit 35 and the CD-ROM drive 70 by selectively opening the lines L36 and L37 based on the selection control signal of the microcomputer 25. The audio signal is selectively output.

In the compact disc system to which the video CD player 100 and the PC 200 configured as described above are connected, the P.B. The background music selection method during playback will be described below.

When a key signal for displaying a menu screen is generated from the key input section 15, the microcomputer 25 provides a corresponding control signal to the optical pickup section 10 in response to the key signal.

The optical pickup unit 10 reads data on the menu screen recorded in the SPI area of the disk 5 based on the control signal of the microcomputer 25, wherein the data read from the optical pickup unit 10 is a slide menu screen. The data read includes the still picture data and the audio data.

The read data is provided to the digital signal processor 20, and the digital signal processor 20 outputs the read data to the MPEG decoder 30 after digital signal processing, error detection, and correction.

The MPEG decoder 30 decodes an error corrected digital video signal and an audio signal provided from the digital signal processor 20 based on the MPEG compression format and outputs the decoded audio signal to the audio signal processor 35 and the video signal processor 40. .

Accordingly, the video signal processor 40 is provided with data for a slide menu screen composed of a plurality of still images, and the audio signal processor 40 is provided with audio data corresponding to each slide menu screen. In the state where the user sets the background music changing function, the microcomputer 25 cuts the line L36 by providing a selection control signal to the switching unit 50.

In addition, the microcomputer 25 generates a control signal to the CPU 60 of the PC 200 connected to the video CD player 100, and the CPU 60 responds to the control signal of the microcomputer 25 to the CD-ROM. A drive control signal is generated in the drive 70 to reproduce the disc mounted in the CD-ROM drive 70.

In this case, the reproduced audio signal is provided to the switching unit 50 through the line L37, and the switching unit 50 outputs the audio signal input from the CD-ROM drive 70 through the speaker.

Therefore, the audio signal reproduced from the CD-ROM drive 70 is output through the speaker 55 while the slide menu screen is displayed during PBC reproduction.

4 is a flowchart illustrating a background music selection process in a video compact disc system according to a preferred embodiment of the present invention. Referring to FIG. A method of selecting background music during playback will be described in detail as follows.

When the user inputs a corresponding key signal to change the background music according to the PBC playback of the video compact disc system (step 101), the microcomputer 25 inputs information set by the user to the internal memory (not shown), that is, background music. Information on whether or not to change is stored (step 102).

Then, if the key signal for displaying the menu screen is input from the user during the normal playback of the disc (step 103) after the above-described step (step 102) (step 104), the microcomputer 25 reads from the setting information stored in the internal memory. If the background music change function is detected (step 105), when the background music change function is set, the microcomputer 25 generates a selection control signal to the switching unit 50 to block the line L36 (step 106). .

Then, a control signal is generated to the CPU 60 of the PC 100 (step 108), and the audio disc mounted on the CD-ROM drive 70 is reproduced at the predetermined position P (step 109). The predetermined position P of one disc becomes the first track position of the disc mounted in the CD-ROM drive 70 in the initial state.

Then, the audio signal reproduced in step 109 described above is output through the speaker 55 (step 110), the microcomputer 25 generates a control signal to the optical pickup section 10 to the SPI of the disk 5 The menu screen recorded in the area 2D is read out and displayed on the monitor 50 (step 111).

Therefore, while the menu screen is displayed on the monitor 50, the music recorded on the audio disk mounted on the CD-ROM drive 70 of the PC 200 is output as the background music.

On the other hand, if the information on the background music change is not detected from the setting information stored in the internal memory of the microcomputer 25 in the above-described step 105, corresponding to each menu screen contained in the SPI area 2D of the disk 5 The recorded background music is output through the speaker 55 of the video CD player 100 (step 107).

If the user inputs the menu screen end signal after the above-mentioned step 111 (step 112), the microcomputer 25 turns off the menu screen by stopping the operation of the optical pickup unit 5, The control signal is generated again to the CPU 60 of the PC 200 to stop the playback of the CD-ROM drive 70 (step 113).

At this time, the CPU 60 stores the playback position P of the current disc (step 114), so that after the menu screen display signal is input, the disc 60 can play back the disc from the stored position P (step 114).

Then, the microcomputer 25 releases the output line L36 of the audio signal processor 35, blocks the output line L37 of the CD-ROM drive 70, and then, as in step 103, the disc ( 5) is played back normally (step 115).

As described above, according to the present invention, the user can change the background music of the menu screen to the music he / she wants by using the PC's CD-ROM drive when the PBC of the video CD is played. It has an effect.

Claims (2)

A video compact disc player capable of PBC playback of a video CD containing a plurality of menu screens and background music corresponding to the menu screens, and a PC equipped with a CD-ROM drive. P.B.C. of the video compact disc system used. In the background music selection method corresponding to the menu screen during playback, A first step of storing change setting information in response to a background music change key signal for setting a background music change corresponding to the menu screen; A second step of detecting whether the background music is changed by reading the stored setting information when a key signal for displaying the menu screen is input during normal playback of the video CD; A third step of, if the change of the background music is set from the detected information, interrupting the audio output of the video compact disc player by the switching means and then playing the CD-ROM drive of the PC; And a fourth step of outputting an audio signal reproduced from the CD-ROM drive, and displaying a menu screen recorded on the video CD. How to select background music during playback. The method of claim 1, wherein the third step, Outputting a plurality of menu screens recorded on the video CD and background music corresponding to each of the menu screens, if the change of the background music is not set from the setting information. PBC on the disk system. How to select background music during playback.