KR100209160B1 - Pbc playing method in video cd system - Google Patents

Abstract

According to the present invention, a list corresponding to a plurality of menus for introducing and selecting program contents is included in a PSD area of track 1, each of which is given a list ID, and each list has a predetermined offset value. PBC playback of a video CD system that selects tracks to be played using the plurality of menus for discs containing next codes, previa codes, and return codes for specifying next, return, and previa paths between menus A method comprising: detecting an ID of a list corresponding to the menu when a user offset setting mode is entered during PBC playback; Assigning a next offset value to a next menu to a next code, a pre-bias code, or a return code in the list corresponding to the menu; Storing an ID of a list corresponding to the menu and an offset value newly assigned to the next code, previus code, or return code; During the PBC playback, if a key signal for executing the next code, previa code, or return code is provided, proceed to the next menu specified by the offset value newly assigned to the stored next code, previa code, or return code. Characterized in that it comprises a step.

Description

How to Play PBC on Video CD System

The present invention relates to a video CD (Compact Disc) system, in particular, when playing a video CD 2.0 disc having a PBC (Play Back Control) function for setting a track to play using a plurality of menu information, the path between each menu information A PBC reproducing method can be arbitrarily changed and reproduced.

In general, Video CD 2.0 has a PBC function that allows a user to perform playback at a track position containing information desired by a user using a menu screen that introduces and selects the information contained in the disc when the disc is played. .

Track 1 of the Video CD 2.0 disc contains the menu information for such a PBC function. 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 the 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 the preset path, and when the user selects a certain item among the 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.

This is described below.

Generally, as shown in Fig. 1, a 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 information about the end of a program. Can be divided into a recorded read out area 1C.

In the case of a video CD 2.0 disc, a data area is allocated to track 1 of the program area 1B. 2 shows a configuration diagram of the data area. In Fig. 2, the data area of the disc includes a primary volume descriptor (PVD) 2A, a karaoke basic information area 2B, a video CD information area 2C, a segment play item (SPI) area 2D, It consists of a CDI application (CD Interactive application) area 2B. Also, the video CD information area 2C is composed of disc information (a), entry table (b), List ID offset table (c), and Play Sequence Discriptor (ds) (d). have.

In this case, selection lists and play lists are included in the above-described PSD (d). The selection list consists of selection codes for selecting a plurality of play lists, and the play list comprises play item codes for selecting tracks of the program area 1B.

The selection list and the play list substantially correspond to the menu information for the PBC function. Each item on the menu screen that can be viewed by the user and the actual information specifying the path between the menus are included in the selection list and the play list. .

Referring to FIG. 3, the selection list 1 includes a list ID code, a play item code, and a plurality of selection codes SE # 1, SE # 2,...

In FIG. 3, the list ID code $ 0001 of the selection list 1 represents a list unique number, the play item code 1000 is an offset value for displaying a menu screen contained in the SPI area, and $ 0004 of the selection code SE # 1 proceeds to the selection list 2. This is an offset value to be used, and $ 0010 of selection code SE # 2 is an offset value for proceeding to play list 4, and $ 0013 of selection code SE # 3 represents an offset value for proceeding to play list 5.

In this case, screen information for displaying the contents of the selection list 1 on the screen as a menu screen is separately stored in the SPI area. Therefore, the user can see the screen information contained in the SPI area and know the contents of the menu contained in the selection list 1.

When the user sees the menu screen displaying the contents of selection list 1, selecting selection code SE # 1 proceeds to selection list 2, selecting selection code SE # 2 proceeds to playlist 4 and selects selection code SE # 3. If selected, proceed to Playlist 5.

List ID $ 0002 of selection list 2 represents a list unique number, return code $ 0000 is an offset value for returning to selection list 1, and play item code 1001 is an offset value for displaying a menu screen contained in the SPI area. , $ 0008 in selection code SE # 1 is an offset value for proceeding to Playlist 1, $ 000B in selection code SE # 2 is an offset value for proceeding to Playlist 2, and $ 000D in selection code SE # 3 is Play Shows the offset value to proceed to Listing 3.

In addition, the list ID code $ 0003 of the play list 1 indicates a list unique number, and the next / return code $ 0004 is an offset value for returning to the selection list 2, and 2 of the play item # 1 and 3 of the play item # 2. Each represents a track number.

List ID code $ 0004 of Play List 2 indicates a list unique number, next / return code $ 0004 is an offset value for returning to selection list 2, and 1002 of play item # 1 is a slide or video screen included in the SPI area. Indicates an offset value for indicating.

List ID code $ 0005 of Play List 3 indicates a list unique number, Next / Return code $ 0004 is an offset value for returning to Play List 2, and 1022 of Play Item # 1 displays a menu screen contained in the SPI area. The offset value for this is shown.

The list ID code $ 0006 of the play list 4 indicates a list unique number, and the next / return code $ 0000 is an offset value for returning to the selection list 1, and 4 of the play item # 1 and 5 of the play item # 2 are Represent each track number.

The list ID code $ 0007 of the play list 5 represents a list unique number, and the next / return code $ 0000 is an offset value for returning to the selection list 1, and 6 of the play item # 1, 7 of the play item # 2, and , Respectively, indicate the track number.

Here, the above-described selection list 1 corresponds to the top menu information, the selection list 2 corresponds to lower menu information lower than the top menu, and the play lists 1,2 and 3 correspond to the bottom menu information. In addition, progressing from the upper menu to the lower menu or from the lower menu to the upper menu is indicated by the offset value of each code, and it can be seen that the path between each menu is set by the offset value.

Meanwhile, in FIG. 3, the next / return code is represented by offset values that designate a path for proceeding to the upper menu of the previous step, but actually has different functions.

Typically, the return code is set to an offset value that designates a path to go directly to a menu of several levels rather than to a previous menu of a previous step.

The next code is set to an offset value that designates a corresponding path when one menu cannot be displayed on one screen or when a user wants to go directly to a specific menu from the current menu. For example, if a menu cannot be displayed on one screen, providing a next signal advances to the next screen for the same menu by the offset value of the next code. In addition, when the offset value of the next code is set to an offset value for advancing to a specific menu, if a next signal is provided, the next code proceeds to a menu designated by the offset value of the next code instead of going to a lower menu.

Also, although not shown in FIG. 3, there is a previa code, which is an offset value that designates a path for going to the upper menu of the previous stage.

In such a video CD 2.0, the off-set value for allowing the user to proceed from the constant menu to the next menu is conventionally set in the disc. In other words, when the user presses the return key, the next key, or the pre-bias key, in the conventional video CD 2.0, the offset value of the return code, the next code offset value, and the pre-bias code offset value set in the selection list or the play list are set. To proceed to the menu specified by.

Therefore, the user may proceed to an undesired menu or the path of the menu set by the producer may be inconvenient for the user.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a PBC reproducing method in which a user can arbitrarily change the offset values of the next, return, and previus codes included in track 1 of the disc. have.

In order to achieve the above object, the present invention includes lists corresponding to a plurality of menus for introducing and selecting program contents in the PSD area of track 1, each of which is assigned a list ID. The list includes a next code, a previus code, and a return code for specifying a next, return, and previa path between menus according to a predetermined offset value. A PBC playback method of a video CD system, comprising: detecting an ID of a list corresponding to the menu when a user offset setting mode is entered during the PBC playback; Assigning a next offset value to a next menu to a next code, a pre-bias code, or a return code in the list corresponding to the menu; Storing an ID of a list corresponding to the menu and an offset value newly assigned to the next code, previus code, or return code; During the PBC playback, if a key signal for executing the next code, previa code, or return code is provided, proceed to the next menu specified by the offset value newly assigned to the stored next code, previa code, or return code. Characterized in that it comprises a step.

1 is an overall structural diagram of a disk.

2 is a structural diagram of a data area of a disc of version 2.0;

3 is a structural diagram of a PSD area of a data area of a disc;

4 is an overall system configuration diagram of a video CD system for performing the PBC playback method of the present invention.

5 is a detailed flowchart for performing the PBC reproducing method of the present invention.

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

100: disc 200: disc player

300,400: D / A conversion unit 500: key input unit

600: display unit 700: control unit

800: OSD unit

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

4 is an overall system configuration diagram of a video CD system for performing the PBC playback method according to the present invention. The disc 100 and the disc player 200 for reading and playing back the program data contained in the disc 100, the disc player. The D / A (Digital / Analog) converter 300 for converting and outputting video data of the program data reproduced by the analog to analog, outputs the audio data of the program data reproduced by the disc player 200 to analog. D / A converter 400 for converting and outputting, key input unit 500 for providing key signals for various functions of the disc player 200, and display unit 600 for displaying an analog video signal converted to a video screen Internal memo when the PBC function of the disc player 200 is performed after storing the offset values of the next, return, and previus codes provided from the key input unit 500 in the internal memory. The control unit 700 and the control unit 700 determine the next, return, and pre-via paths between the menus based on the offset values stored in the control unit. The predetermined information provided from the control unit 700 is displayed on the display unit 600. The OSD unit 800 is configured to display an OSD (On Screen Display) on an image screen.

FIG. 5 is a detailed flowchart for performing the PBC reproducing method of the present invention, which will be described below with reference to FIG. 5.

If the user provides the user offset setting key signal to the controller 700 by using the key input unit 500 while the menu screen is being displayed on the display unit 600 according to the PBC function performance (S1) of the disc player 200 ( S2) After detecting the ID of the list corresponding to the currently displayed menu screen (S3), the controller 700 controls the OSD unit 800 to control the screen for setting the user offset to be displayed in the OSD (S4).

The OSD unit 800 is controlled by the control unit 700 [1. NEXT, 2. PREVIOUS, 3. RETURN] on the display unit 600 to display the OSD. When the user views the above-mentioned OSD screen and provides the next key, pre-via key, or return key signal to the control unit 700 using the key input unit 500 (S5, S6, S7), the control unit 700 displays the OSD. The control unit 800 controls the screen for inputting the offset value to be displayed by the OSD (S8). The OSD unit 800 causes the display 600 to display a screen for inputting a new offset value under the control of the controller 700.

When the user provides the control unit 700 with a key signal indicating a predetermined offset value by using the key input unit 500 (S9), the control unit 700 newly inputs a process S9 in the PSD area of the track 1 of the disc 100. It is determined whether a list of the next menu specified by the offset value is stored (S10).

As a result of the determination, if the list of the next menu designated by the newly input offset value is not included in the PSD area of the track 1, the OSD unit 800 is controlled to display such a situation (S11). If the track 1 is stored in the PSD area of the track 1, the control unit 700 newly inputs a next code, a prebios code, or a return code corresponding to a next key, a prebios key, or a return key input in a process S5, S6, or S7. After assigning the offset value (S12), the ID of the list corresponding to the currently displayed menu screen and the offset value newly assigned to the next code, pre-bis code, or return code are stored in the internal memory (S13). .

Then, when the EXIT key signal is provided to the control unit 700, the offset setting mode ends (S14), and the process proceeds to the next. When the user provides the next key, previersky, or return key using the key input unit 500 while performing the PBC function (S17), the ID of the list corresponding to the currently displayed menu screen of the control unit 700 is stored in the internal memory. Search whether it is stored (S18). If the search result is not found, the next menu specified by an offset value of a next code, a pre-bias code, or a return code of the list included in the PSD area of the disk corresponding to the currently displayed menu screen is performed (S20).

On the other hand, if the ID of the list corresponding to the currently displayed menu screen is stored in the internal memory, the control unit 700 is assigned to the next code, pre-bias code, or return code of the list ID corresponding to the currently displayed menu screen. The offset value is detected from the memory. Then, the control proceeds to the menu designated by the offset value detected from the memory (S19).

When the user provides the user offset cancel key to the control unit 700 using the key input unit 500 (S15), the control unit 700 may provide an offset value assigned to a next code, a pre-bias code, or a return code stored in an internal memory. Clear (S16).

As described above, the present invention has a very convenient effect because the user can arbitrarily change the offset values of the next, return, and pre-bias codes recorded on the track 1 of the disc.

Claims (1)

In the PSD area of Track 1, lists corresponding to a plurality of menus for introducing and selecting program contents are listed, and each list is assigned a list ID, and each list is assigned a menu according to a predetermined offset value. In a PBC playback method of a video CD system for selecting a track to be played by using the plurality of menus for a disc containing a next code, a previus code, and a return code for specifying a next, return, and previa path between : Detecting an ID of a list corresponding to the menu when the user offset setting mode is entered during the PBC playback; Assigning a next offset value to a next menu to a next code, a pre-bias code, or a return code in the list corresponding to the menu; Storing an ID of a list corresponding to the menu and an offset value newly assigned to the next code, previus code, or return code; During the PBC playback, if a key signal for executing the next code, previa code, or return code is provided, proceed to the next menu specified by the offset value newly assigned to the stored next code, previa code, or return code. PBC playback method of a video CD system comprising the step of.