JP2003141853A - Dvd video reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DVD video reproducing device equipped with a means for reproducing a DVD video disk, on which a large number of independent video are recorded, at random. SOLUTION: When a DVD video disk 1 is discriminated as a disk, in which ordinary random reproduction is disabled in the menu screen detecting part of a random reproducing part 20, a menu screen is detected by data from a DVD data processor 6. In a menu link destination class discriminating part 15, it is discriminated whether the link destination of each of items in the menu screen is a title or chapter and in a random selecting part, data in the link destination are reproduced while selecting these items at random. When the link destinations are not serial numbers, the title or chapter of a number which is not designated as a link destination, is handled as a title or chapter in the same group as the title or chapter of a number designated as a preceding link destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DVD video reproducing apparatus for reproducing a DVD video, and more particularly to a DVD video reproducing apparatus equipped with means for randomly reproducing a DVD video disc on which a large number of independent videos are recorded. .

[0002]

2. Description of the Related Art In recent years, a wide variety of DVD discs capable of recording a large amount of video and audio have been sold inexpensively, and a DVD video reproducing apparatus for reproducing the DVD discs has become inexpensive, so that a commercially available DVD disc can be purchased. Playing is widespread. More recently, DVD-R and DVD-R
W and DVD-RAM have also come to be used, and various homes are now able to record various videos, edit and view them, and DVD videos are widely used in various forms. It has become so. In addition, since high-performance audio data is also recorded on the DVD video disc, many performances are recorded along with graphics so that audio can be mainly used to enjoy images.

On the other hand, a CD, which has been widely used conventionally, has a function generally called random reproduction, and at the end of track reproduction, the player can randomly select and reproduce the next track. As such, when random playback is not always preferred, the random playback function may be used to listen to songs recorded on a CD.

Similarly, in a DVD video, for example, many performances of a particular artist are recorded in D.
When playing a DVD disc that mainly uses audio, such as when playing a VD disc, the above-mentioned CD is used.
There are cases where it is not preferable to always play back in the same order as in the case of, and at that time, random playback may be desired as with CDs. This is especially true when using a DVD video playback device mounted on a vehicle and when trying to mainly listen to audio while driving various performances recorded on a DVD video, similar to the conventional random playback of a CD. There are many cases in which random playback is desired.

[0005]

However, the above-mentioned C
In the case of D, one song is commonly set as one track, whereas in the DVD video, one song is one title and one song.
It is up to the disc creator to decide which of the chapters to use. Therefore, when performing random playback, which of the title and chapter is used as a reference becomes a problem, and in the end, it is necessary to allow both the title and the chapter to be selected and played on the playback device. In the random reproduction, it is necessary to equip the reproducing device with a mechanism for automatically selecting and reproducing one of them.

Further, in the DVD video, it is possible to limit the user operation according to the standard, and therefore D
In some cases, the reproduction control signal recorded in the VD video may include a signal for prohibiting the search operation. In this case, when the user plays back the DVD video, it is natural that the user cannot intentionally perform the search operation, and the DVD disk playback apparatus automatically performs the search operation as a predetermined operation. This function will not work even when set to. In this case, there is a problem in that the random reproduction function of the mechanism for automatically selecting and reproducing the title or chapter as described above cannot be executed.

Therefore, the present invention makes it possible to perform random reproduction even when search prohibition is set in a DVD video disc, and D
Provided is a DVD video playback device capable of easily performing random playback regardless of whether video or audio data recorded on a VD video disc is recorded on the disc in a title or chapter format. The main purpose is to do.

[0008]

In order to solve the above problems, a DVD video reproducing apparatus according to the present invention detects a menu screen detecting section for detecting a menu screen from a reproduction signal of a DVD video, and a menu screen detecting section for detecting the menu screen. The random selection unit for randomly selecting a plurality of items displayed on the menu screen, and the reproduction processing unit for reproducing the data corresponding to the item selected by the random selection unit.

Further, in another DVD video reproducing apparatus according to the present invention, the item indicates a link destination indicating a position where data exists.

Further, another DVD video reproducing apparatus according to the present invention is such that the link destination is a title or a chapter.

Further, in another DVD video reproducing apparatus according to the present invention, when the title or chapter of the link destination is not a serial number, the title or chapter of a number not designated as the link destination is linked to the preceding link destination. It is handled as a group with the designated number of titles or chapters.

Further, another DVD video reproducing apparatus according to the present invention displays the screen detected by the menu detecting section. It was done.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram showing a functional portion which mainly performs random reproduction in a DVD video reproducing apparatus according to the present invention. In the DVD video reproducing device shown in FIG. 1, a DVD video disc 1 is fixed to a table which is rotated by a spindle motor 2 and is rotationally controlled at a predetermined speed. An optical pickup 3 is arranged on the disc 1 so as to face a recording layer formed on the lower surface of the disc 1 in the figure, and a semiconductor laser beam focused on a predetermined position is irradiated from the optical pickup 3 through an objective lens. The laser light reflected from the disc is again received by the photodiode through the objective lens, thereby reproducing the RF signal recorded on the disc, amplifying this signal in the RF amplifier 4, and transmitting it to the DVD reproduction signal processing unit 5. It is outputting.

In the DVD reproduction signal processing unit 5, the signal from the RF amplifier 4 is input to the DVD data processor 6, and the DVD data processor 6 demodulates MPEG data and the like, and also performs error correction processing, MPEG video data and audio. Digital signal processing such as data separation processing and various management information and address information extraction processing is performed. The MPEG video decoder 7 decodes the MPEG2 image data based on the MPEG video data separated by the DVD data processor 6. The processing units as described above are processed in association with each other by the signal of the system control unit 6, and all functional units described later are also processed by the signal of the system control unit.

The decoded video data is digital-
The luminance signal Y and the color difference signals Cb, Cr are input to the analog converter 8 and output as a video signal. The audio decoder 9 is the M separated by the DVD processor 6.
Music data is decoded based on audio data such as PEG. The decoded music data is passed through a digital-analog (D / A) converter 10 to obtain
Converted to analog music signal.

Of the various management information output from the DVD processor 6 to the system control unit 12, the normal random reproduction permission / inhibition determination unit 13 in the random reproduction unit 20
Information for determining whether or not the DVD video disc 1 to be reproduced at present is a disc in which normal random reproduction is prohibited is fetched and the determination is performed.
In this determination, for example, when search prohibition data is previously recorded in the management information data of the DVD video disc 1 to be reproduced, the DVD video disc is a disc that cannot perform random reproduction. Determine that there is.

That is, in the random reproduction operation, when the user gives an instruction for random reproduction, the reproduction instruction section of the player randomly designates a portion to be reproduced, and then the designated portion is searched for. The operation of reproducing is performed in order. On the other hand, if the search is prohibited as described above, it becomes impossible to reproduce the portion instructed by the reproduction instruction unit of the player, so that random reproduction cannot be performed.

When the menu screen detection unit 14 determines that the normal random reproduction permission / inhibition determination unit 13 is about to reproduce a disc that cannot be randomly reproduced by normal means, the DVD data processor receives the signal. The menu screen is searched from the data processed in 6. In this search, for example, when there are many data linked to other screens on a specific screen, this part can be discriminated as a menu screen. Such a search has a function of displaying and displaying the menu screen in the conventional DVD video player, and thus various menu screen selecting means conventionally used can be adopted here. .

In the menu link destination type discriminating unit 15, the menu screen detecting unit 14 searches for a menu screen, and when the menu screen is found, the portion of the menu screen which is the link destination is " It is determined whether the title is "title" or "chapter". As mentioned above, in the DVD video disc,
When recording video and audio in it, for example
It is possible to freely decide whether to divide by title as shown in (a) or by chapter as shown in (b) of FIG. DVD
It is determined which method is used for recording on the video disc, and it is used as reference data for subsequent playback instructions. In addition, DV
In the D-video disc, up to 99 pieces can be divided when divided by titles, and 999 pieces can be divided when divided by chapters, so these are properly used depending on the data content to be recorded.

Some DVD video discs have a menu screen for selecting a large number of menu screens. In that disc, the menu screen of the second layer selected on the menu screen of the first layer is selected. , Is configured to indicate an item for instructing a portion to be reproduced.
Further, the random reproduction unit 20 is provided with a lower layer menu random selection unit 16 so that a large number of second layer menu screens can be randomly selected and reproduced.

In the title group / chapter group creating section 17, in each item of the menu screen, the link destination is
For example, when titles 1, 3, 5, ... Are not connected in order, and when the numbers of these titles are randomly designated in the random reproduction described later, for example, only title 1 is reproduced and title 2 is not reproduced. It will be. However, for example, when the title 1 is the link destination as described above, when the first title part is to be shown as the link destination, the data is originally the data in which the title 1 and the title 2 are integrated. Whether or not the linked titles are connected in order in this way is determined by the menu link destination type determination unit 15 when the linked destinations are titles or chapters. It is possible to determine and operate by determining whether or not the data is connected.

In order to solve the above-mentioned inconvenience caused by the fact that the linked numbers are not connected, in this embodiment, titles 1 and 2 exist as one title group in the above case, and It is assumed that the titles 3 and 4 are one title group, and the titles 5 and so on are also one title group, and the data of such a title group is displayed by the link destination of the menu screen. create. Similarly, if this disc is divided by chapters, the menu link destination type determination unit 1
When it is determined in step 5, a chapter group is created in the same manner as described above.

Further, in the title / title group / chapter / chapter group random selection section 18 in the random reproduction section 20, for example, when the link destination is a title of consecutive numbers on the menu screen of this disc, the numbers are randomly selected. , If it is not a serial number, the title group created as described above is randomly selected. This disk is the menu link destination type discriminating unit 1
When it is determined in 5 that the title is divided into chapters, the same random selection as in the case where the title is divided is performed.

In the title / title group / chapter / chapter group reproduction end judging section 19, it is determined whether or not all the data contained in the title, title group, chapter, chapter group selected in the random selecting section 18 has been reproduced. To determine. Based on this determination, the random selection unit 18 selects the next portion, or when it is determined that all the portions of the lower layer have been reproduced when the menu is layered as described above, the lower layer menu random The selection unit 16 operates to select the next menu.

In the DVD video reproducing apparatus of the embodiment configured as described above, for example, the operation flow of the random reproduction processing shown in FIG. 2 and the reproduction processing portion in the operation flow of FIG. 2 as shown in FIG. It can be operated in sequence according to a detailed operation flow. Hereinafter, these operation flows will be described with reference to the functional block diagram of FIG. 1 and FIGS. 4 to 6.

In the random reproduction process shown in FIG.
First, it is determined whether or not the DVD video disc loaded in the DVD video playback device is a disc that can be randomly played back by a normal means. This determination can be made by the normal random reproduction permission / inhibition determination unit 13 in FIG. 1 depending on whether or not the search prohibition data is previously recorded in the management information data read from the disc as described above.

If it is determined that the disc is capable of normal random reproduction, then normal random reproduction processing is performed in step S8, and this operation flow ends (step S9). Since the present invention is for random reproduction of a disc that cannot be subjected to normal random reproduction, it is determined in step S1 that normal random reproduction is not possible during reproduction of such a disc.

Next, it is determined whether or not there is a menu screen (step S2). At the time of this determination, it can be determined whether or not there are a plurality of link destinations in the data of the specific screen, and this is performed by the menu screen detection unit 14 in FIG. In the present invention, when there is a plurality of data indicating the link destination on the menu screen, random reproduction is performed using this, so when it is determined that the menu screen does not exist, this operation flow ends. Yes (Step S
9).

When it is determined that the menu screen exists, it is determined whether or not the menu screen is a multi-layer menu screen (step S3). In this determination, when there are more link destinations in the data of the screen shown as the link destination in the menu screen retrieved as described above, it is determined that a multi-layer menu screen exists. .

The structure of the menu screen as described above is, for example, as shown in FIG. 5, the DVD to be reproduced.
The video disc is Artist A's album,
When it is shown that data exists in this disc with a structure such as song names a, b, c, d ..., It can be said that this is a single-layer menu. On the other hand, for example, as shown in FIG. 6, this disc contains a large number of songs by a large number of artists as a “J-POPS collection”, and as a result, a menu screen for each artist is displayed as a first-level menu. It exists, and the titles and chapters where the menu screens of the respective artists exist are recorded as link destinations. Further, for example, when the artist A is selected here, the menu screen of the "artist A album" of the same figure as the second hierarchical menu 1 is displayed, and any one of the song names a, b, c and d displayed here is displayed. By selecting, the song can be selected and played. Similarly, “artist B album” ... As the second hierarchical menu 2 can be arbitrarily selected and reproduced.

When it is determined in step S3 that the menu is a multi-layer menu screen, a menu screen is randomly selected from the second-layer menu screen (step S4). It should be noted that here, as an example of a multi-layer menu screen, a menu that exists up to the second layer is described. However, if there is a third layer, for example, the menus up to the second layer described below are used. Can be activated. Further, in this embodiment, an example of randomly selecting the menu of the second layer is shown, but this portion may be set to be reproduced in order from the menu 1.

In step S4, when a menu screen is randomly selected from the second level menu screen, each item is randomly selected from the selected menu screen and reproduced (step S5). As a result, when "Artist B album" is selected in the example of FIG. 6, the songs with the song names m, n, o, p ... Present therein are randomly reproduced.
This reproduction process is shown in more detail in FIG. 3 and will be described later.

When the random reproduction of all the items is completed by the selected second layer menu screen, it is judged whether or not all the second layer menus have been selected (step S6), and the second layer still remains. When it is determined that there is a menu that has not been selected in the menu, the process returns to step S4 again, the operation of randomly selecting a menu from the menu screen of the second layer is performed, and the same operation is repeated thereafter. . When it is determined in step S6 that all the second-level menus have been selected,
This random reproduction process ends. It should be noted that the random reproduction process can be continued unless instructed by the user.

When it is determined in step S3 that the retrieved menu screen is not a multi-layered menu screen, a reproduction process is performed by randomly selecting from the menu screen by the same process as the random reproduction process of step S5. Is performed (step S7). This reproduction process is also shown in detail in FIG.

Steps S4 and S of FIG.
In the random reproduction process in the specific menu screen in 7, especially the title or chapter number of the link destination is skipped as described above, and for the process when it is necessary to handle these as a group, A reproduction process as shown in FIG. 3 is performed.

First, it is determined whether the link destination from the menu is "title" or "chapter" (step S11). This means that any one may be selected when recording the DVD video disc as described above, and therefore, it should be clarified in advance which one should be searched when searching the link data recorded on the disc to be reproduced. It is necessary to keep it. This operation is performed by the menu link destination type determination unit 15 in FIG. 1, and this data is used by various functional units in the random reproduction unit 20.

Next, it is determined whether or not the linked title or chapter is a serial number (step S12).
If it is determined that the number is not a serial number, the data of the title group and the chapter group is created assuming that the vacant number portion is one group which is consecutive to the number before the portion. This is done in the title group / chapter group creation unit 17 in FIG. Accordingly, for example, as shown in FIG. 4, when titles 1, 3, and 5 are recorded as link destinations, titles 1 and 2 are set as title group 1, titles 3 and 4 are set as title group 2,
Let title 5 and title 6 be title group 3 ... Note that it is not necessary to create such a title group as actual data, and assuming that such a group exists, if title 3 is selected during random playback and title 4 is set to be played continuously. Good. The same applies to chapters as shown in FIG.

Next, the titles or chapters of each group are randomly reproduced (step S14). After that, it is determined whether or not all of the selected group of titles or chapters have been reproduced (step S15). For example, it is determined whether or not title 2 in addition to title 1 in the title group 1 has been reproduced. Also, as described above, when there is a serial number among the link destinations that are not serial numbers, it is determined here whether or not all the data existing in a single title or chapter has been reproduced.

When it is determined in step S15 that all the titles or chapters of the selected group have been reproduced, it is then determined whether or not the titles or chapters of all the groups have been reproduced (step S16). If it is determined that there is a title group or chapter group that has not been reproduced, the process returns to step S14 to perform the operation of randomly reproducing the titles or chapters of each group, and the same operation as described above is repeated.

When it is determined in step S16 that the titles or chapters of all the groups have been reproduced, this operation is ended (step S20). As a result of this end, the process proceeds to step S6 next to step S5 or step S9 next to step S7 in the operation flow of FIG.

In the above embodiment, an example is shown in which the random reproduction using the menu screen is automatically executed without the user being particularly aware that the above operation is performed. It is also possible to display a menu screen selected in the process of operation as described above, and display what kind of music is reproduced, such as what kind of music is reproduced from now on. . Further, since such a reproducing method performs processing using the data on the menu screen, even in the case of a disc in which the search operation is prohibited, for example, the prohibited search operation is not directly performed. It does not hinder the intention of the disc creator.

[0042]

The DVD video reproducing apparatus according to the present invention,
A menu screen detection unit that detects a menu screen from a DVD video playback signal, a random selection unit that randomly selects a plurality of items displayed on the menu screen detected by the menu screen detection unit, and a selection by the random selection unit Since a reproduction processing unit for reproducing the data corresponding to the item is provided, random reproduction can be easily performed by a simple means even when the search prohibition is set on the DVD video disc. It can be carried out.

Further, in another DVD video reproducing apparatus according to the present invention, since the item indicates the link destination indicating the position where the data exists, the menu screen can be detected by the data indicating the link destination. Also, by proceeding to the link destination, the specified portion can be surely reproduced.

In another DVD video reproducing apparatus according to the present invention, since the link destination is a title or a chapter, the video or audio data recorded on the DVD video disc is in the form of a title or a chapter on the disc. In any of the above cases, the subsequent processing can be surely performed by identifying this first, so that the random reproduction processing of all DVD video discs can be easily performed.

Further, in another DVD video reproducing apparatus according to the present invention, when the title or chapter of the link destination is not a serial number, the title or chapter of the number not designated as the link destination is linked to the preceding link destination. Since it is handled as a group with the title or chapter of the designated number, the random playback processing can be surely performed as a series of data even for the portion not designated as the link destination as described above. .

Further, since another DVD video reproducing apparatus according to the present invention displays the screen detected by the menu detecting section, the user of this reproducing apparatus is currently reproducing during random reproduction. It becomes possible to know the reproduction content such as the song title.

[Brief description of drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention.

FIG. 2 is an operation flow chart of a random reproduction process of the embodiment.

FIG. 3 is an operation flow chart of a part particularly performing a reproduction process in the random reproduction process of the embodiment.

FIG. 4 is a diagram showing an aspect in which titles or chapters are treated as one group when a non-continuous link destination is designated on the data structure of the DVD video disc and the menu screen.

FIG. 5 is a diagram showing an example of a single-layer menu recorded on a DVD video disc.

FIG. 6 is a diagram showing an example of a multi-layer menu recorded on a DVD video disc.

[Explanation of symbols]

1 disc 2 spindle motor 3 Optical pickup 4 RF amplifier 5 DVD playback signal processor 6 DVD data processor 12 System control unit 13 Ordinary random playability determination unit 14 Menu screen detector 15 Menu link destination type determination unit 16 Lower layer menu random selection section 17 Title Group / Chapter Group Creation Department 18 Random selection part 19 Playback end determination unit 20 Random playback part

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5D044 BC03 CC06 DE03 DE12 DE17                       DE23 DE33 DE38 DE48 DE54                       DE59 EF05 FG19 GK12                 5D077 AA23 BA21 CA11 DC40 HC12                       HC17 HC50                 5D110 AA15 AA29 BB06 DA03

Claims (5)

[Claims] 1. A menu screen detection unit for detecting a menu screen from a DVD video reproduction signal; a random selection unit for randomly selecting a plurality of items displayed on the menu screen detected by the menu screen detection unit; A DVD including a reproduction processing unit for reproducing data corresponding to the item selected by the random selection unit.
Video playback device. 2. The DVD video reproducing apparatus according to claim 1, wherein the item indicates a link destination indicating a position where data exists. 3. The DVD video reproducing apparatus according to claim 2, wherein the link destination is a title or a chapter. 4. When the title or chapter of the link destination is not a serial number, the title or chapter of the number not designated as the link destination is 1 with the title or chapter of the number designated as the preceding link destination.
4. Handling as a group.
The described DVD video playback device. 5. The DVD video reproducing apparatus according to claim 1, wherein the screen detected by the menu detecting unit is displayed.