KR19980079022A - 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 background music according to a CD screen or a slide when playing a menu or slide of a VCD in a video CD player. 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, the video compact disc player A third step of reproducing the CD-ROM drive of the PC after blocking the audio output of the PC; outputting an audio signal reproduced from the CD-ROM drive through a PC speaker provided in the PC; And a fourth step of displaying a menu screen.

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 background music selection method suitable for adaptively 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, 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 composed of 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, the video compact disc player A third step of reproducing the CD-ROM drive of the PC after blocking the audio output of the PC; outputting an audio signal reproduced from the CD-ROM drive through a PC speaker provided in the PC; The video BC of the video compact disc system including the fourth step of displaying the menu screen. . 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: speaker 50: monitor

60: CPU 70: CD-ROM Drive

75: PC 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.

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 includes 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, a speaker 45, a monitor 50, and the PC side 200 is composed of a CPU 60, a CD-ROM drive 70, and a PC speaker 75.

First, referring to the main functions of the respective components provided in the video CD player 100, the optical pickup unit 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 process the decoded audio and video signals provided from the MPEG decoder 30 and output them through the speaker 45 and the monitor 50, respectively.

On the other hand, the PC side 200 is a CPU 60 that processes the overall operation control and data of the PC, a CD-ROM drive 70 capable of playing an optical disc, and an audio signal reproduced from the CD-ROM drive 70. It consists of a PC speaker 75 for outputting.

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 unit 15, the microcomputer 25 generates a corresponding control signal in response to the key signal and provides it to the optical pickup unit 10. FIG.

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 generates an output cutoff signal to the audio signal processor 35 to mute the audio output.

As described above, the microcomputer 25 cuts off the output of the audio signal processor 35 and generates a control signal to the CPU 60 of the PC 200 connected to the video CD player 100. 60 generates a drive control signal to the CD-ROM drive 70 in response to the control signal of the microcomputer 25.

On the other hand, the CD-ROM drive 70 described above includes a function such as an optical pickup unit, a digital signal processing unit, an MPEG decoder, an audio signal processing unit, and the like, such as a video CD player, to play a general audio disc. In a typical CD-ROM drive, audio disc playback is performed automatically after the playback of one track (song) is completed.

Therefore, while the slide menu screen is displayed during PBC playback, the CD-ROM drive 70 plays back the disc mounted on the deck (not shown) based on the drive control signal of the CPU 60, and reproduces the reproduced audio signal on the PC. Output through the speaker 75.

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. When the background music change function is detected (step 105), when the background music change function is set, the microcomputer 25 blocks the output line L36 of the audio signal processor 35 (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.

On the other hand, the audio signal reproduced in the above-described step 109 is output through the PC speaker 75 (step 110), the microcomputer 25 generates a control signal to the optical pickup unit 10 to the disk 5 The menu screen recorded in the SPI 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 original background music is output through the speaker 45 of the video CD player (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 block of the output line L36 of the audio signal processing unit 35, and reproduces the disc 5 normally as in step 103 (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 system capable of PBC playback of a video CD containing a plurality of menu screens and a plurality of background music corresponding to each menu screen, and a video compact disc system using a PC equipped with a CD-ROM drive. Seed. 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 interrupting audio output of the video compact disc player and reproducing the CD-ROM drive of the PC if the change of the background music is set from the detected information; And a fourth step of outputting an audio signal reproduced from the CD-ROM drive through a PC speaker provided in the PC, 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, If the change of the background music is not set from the setting information, outputting a plurality of menu screens recorded on the video CD and background music corresponding to the respective menu screens through the speaker provided in the video compact disc player. P. B.C. of the video compact disc system, characterized in that it further comprises. How to select background music during playback.