JP2000175154A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device that selects a desired image among a plurality of images whose reproduction timing is the same with a simple operation. SOLUTION: A system controller 60 displays a multi-angle selection menu in response to an instruction by a user that instructs display of the multi-angle selection menu to simultaneously display an image at each angle. In the case that the user selects any of the images of each angle and instructs selection of angles, the system controller 60 selects the reproduction for the image at the selected angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus for reproducing digital versatile disks (DVDs).

[0002]

2. Description of the Related Art Recently, DVDs have been used as disc-type recording media.
Is attracting attention. This DVD has a diameter of 12 cm and a thickness of 1.2 mm, and has the same shape as a CD (compact disk), but has a storage capacity of 4.7 GB in a single layer and 8.5 GB in a two layer by increasing the recording density. Has been realized. There are DVDs having a diameter of 8 cm other than 12 cm, and DVDs having a single-sided or double-layered single-sided or double-layered DVD in addition to a single-layered or double-layered single-sided DVD.

In addition, various types of data are mixedly stored on a DVD by employing image data compression technology and audio data compression technology based on MPEG2. Considering the case of recording a movie on a DVD, video data and audio data are usually stored. For example, by storing subtitle data in a plurality of languages in addition to these,
Captions in the language selected by the user can be displayed. In addition, by storing still image data such as profiles of movie directors and performers, it becomes possible to display these contents by user operations. further,
Image data of a plurality of photographing directions (angles) is stored by photographing one subject from a plurality of directions or photographing a plurality of subjects individually, and image data of an angle selected by a user during reproduction. Function (multi-angle function) and a function (multi-angle function) that can change the development of stories according to the user's selection by storing image data and audio data corresponding to multiple stories. (Story function). The DVD reproducing device performs a reproducing operation of a DVD storing such various data.

[0004]

Considering the case where a multi-angle reproducing operation is performed in the above-mentioned conventional DVD reproducing apparatus, when changing the viewing direction of an object during reproduction or changing to another object, it is difficult for the user to change the direction. Performs an operation such as an angle switching instruction to switch to another angle image. However, since the image of the switching destination is reproduced for the first time after the operation, if the image of the switching destination is not the one desired by the user, the user must perform an operation such as an angle switching instruction again. The operation was complicated. For example, when images corresponding to nine angles are recorded at the same time, it is necessary to issue an angle switching instruction at a maximum of eight times, and it may take some time to display an image each time. This is a rather complicated operation.

[0005] In particular, in the case of a DVD reproducing apparatus to be mounted on a vehicle, these operations are performed during traveling. Therefore, the number of operations is reduced as much as possible, and a plurality of images having the same reproduction timing are reproduced by a simple operation. There is a demand for a DVD playback device that can select a desired one from among them.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the purpose of making it possible to select a desired image from a plurality of images having the same reproduction timing by a simple operation. A playback device is provided.

[0007]

In order to solve the above-mentioned problems, a disk reproducing apparatus of the present invention provides a selection menu in which a plurality of screens having the same reproduction timing and which are alternatively selected are arranged side by side. When one of the displayed images is selected from among the plurality of images included in the selection menu, a reproduction operation corresponding to the selected image is performed. Therefore, the user does not need to sequentially display a plurality of images having the same playback timing and perform an operation of selecting a desired one from among the images, and can view the plurality of images included in the selection menu to perform this selection. The operation can be performed, and a desired operation can be selected from a plurality of images having the same reproduction timing by a simple operation.

[0008] In particular, it is desirable that the above-mentioned selection menu include images obtained by reducing and displaying images corresponding to a plurality of photographing directions, and that each image is a moving image. By displaying the selected image itself in a reduced size, it is easy to grasp the display contents (reproduction contents).
Further, by using each of them as a moving image, it becomes easier to grasp the contents.

It is desirable to display the selection menu only when a predetermined display instruction is given by the user. By not displaying the selection menu when the user does not want to switch the screen using the selection menu, extra operations such as canceling the display of the menu screen are unnecessary, and the user is complicated. Operation can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a DVD reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

(1) Contents of Data Recorded on DVD First, details of data recorded on a DVD as a disk-type recording medium will be described. FIG. 1 is a diagram showing a structure of a volume space of a DVD. As shown in the figure,
The volume space of a single-layer DVD has a volume / file structure, DVD-V from the inner circumference to the outer circumference of the DVD.
It is composed of an video zone and an DVD zone. Among these, the DVD-Video zone contains various data necessary for the reproducing operation. The DVD-Video zone includes a video manager (VMG) and one or more video title sets (VTS) corresponding to each title.

FIG. 2 is a diagram showing a data structure of the VMG. As shown in the figure, the VMG is composed of video manager information (VMGI), a video object set for VMG menu (VMGM_VOBS), and a VMGI backup file (VMGI_BUP).

[0013] The VMGI contains information on VTS (for example, the number of VTS, identification information of each VTS, each VTS in DVD).
Storage order, etc.), the display order of the titles displayed in the title menu, and one or more program chain information (PG
CI), a disc ID for identifying a DVD, and the like. VMGM_VOBS is composed of one or more video objects (VOB). This V
The OB includes video data that is playback data when a menu screen (title menu screen) for selecting a title is played.

FIG. 3 is a diagram showing a data structure of the VTS. As shown in the figure, VTS includes video title set information (VTSI), VTS menu video object set (VTSM_VOBS), VTS title video object set (VTSTT_VOBS),
VTSI backup file (VTSI_BU
P).

VTSI is V for identifying a title.
Information about titles such as TS_ID, one or more PGs
CI and the like are included. VTSM_VOBS and VT
STT_VOBS is composed of one or more VOBs. This VOB includes reproduction data such as video data and audio data.

A program chain (PGC), which is a logical processing unit in the reproducing operation, is composed of program chain information (PGCI) and one or a plurality of video objects (VOB). For example, a PGC is constituted by one PGCI in the VMGI and one or a plurality of VOBs in the VMGM_VOBS. Also, VT
A PGC is constituted by one PGCI in the SI and one or a plurality of VOBs in the VTSM_VOBS. Alternatively, one PGCI in VTSI and VTSTT_VO
A PGC is constituted by one or a plurality of VOBs in the BS. Some PGCs have no VOB, and in this case, the PGC does not include any video or audio.

PGCI and VMGM_VOB in VMGI
PG composed of one or more VOBs in S
C configures a title menu, and the title menu is used to select a title and start reproduction.
Also, a PGC comprised of a PGCI in the VTSI and one or a plurality of VOBs in the VTSTT_VOBS
Contains various data necessary for reproducing the corresponding content when any item in the title menu is selected.

FIG. 4 is a diagram showing an example of the structure of the PGC, in which PGCI in VMGI and 1 in VMGM_VOBS are included.
Alternatively, the structure of a PGC constituted by a plurality of VOBs is shown. As shown in FIG.
1 is PGCI # 1 in VMGI and VMGM_VOBS
VOBs # 1 to # 3. Also,
PGC # 2 is composed of PGCI # 2 in VMGI and VMGM_
It is composed of VOBs # 4 and # 5 in the VOBS. These PGCs are specified by PGC numbers. The PGC number is determined according to the storage order of the PGCI in the VMGI. For example, the PGC shown in FIG.
In the above, since PGCs are stored in the VMG in the order of PGCI # 1 and PGCI # 2, the PGC number of PGC # 1 including PGCI # 1 is “1”, and PGC
The PGC number of PGC # 2 including I # 2 is “2”.

Note that PGCI and VTSM_ in the VTSI
PGC composed of one or a plurality of VOBs in VOBS, PGCI in VTSI and VTSTT_VO
P composed of one or more VOBs in the BS
The GC also has the same structure as the PGC shown in FIG. The PGCI includes a reproduction order of a plurality of corresponding VOBs, information on a PGC to be reproduced next, and the like.

FIG. 5 shows the above-mentioned VMGM_VOBS, V
V constituting TSM_VOBS, VTSTT_VOBS
It is a figure showing the data structure of OB. As shown in the figure,
VOB is composed of a plurality of cells. In the multi-angle function, for example, when one subject is photographed from a plurality of photographing directions (angles), one cell contains video data of one angle at a predetermined photographing time. Then, a plurality of cells including video data of all angles at a predetermined shooting time are further divided into interleaved units (ILVUs).
In the multi-angle playback operation, ILVUs are selected one by one from the interleaved blocks and processed.

FIG. 6 is a diagram showing an example of the ILVU.
An example of an ILVU in a case where a subject is photographed from four angles (angles 1 to 4) is shown. As shown in the figure, in the interleaved block, four cells # 1 to # 4 including video data of angles 1 to 4 at a predetermined photographing time are divided into ILVUs and arranged in an interleaved manner. For example, cell # 1 contains the video data of angle 1 and cell # 2 contains the video data of angle 2. Also. Cell # 1 is divided into ILVU # 1 and ILVU # 5, and cell #
2 is divided into ILVU # 2 and ILVU # 6. In addition,
The address of each ILVU is indicated by NV_PCK arranged at the head of the ILVU. Also, each angle is
Specified by angle number.

FIG. 7 is a diagram showing the structure of a cell. As shown in the figure, each cell is composed of one or more video object units (VOBU). Each VOBU includes a navigation pack (NV_PC
K), a video pack (V_PCK), a sub-picture pack (SP_PCK), and an audio pack (A_P
CK).

NV_PCK contains reproduction control information (PC
I) and data search information (DSI). In the PCI and DSI, the position of the VOBU to be reproduced next, the data amount of the VOBU, the reproduction time, and the like are set. V_PCK, SP_PCK, and A_PCK are pack headers and packet headers each including information on the type of playback data (moving image, sub-picture, audio), and video data, sub-picture data, and audio data (compressed data). Playback data).

(2) Overall Configuration of DVD Playback Apparatus FIG. 8 is a diagram showing an overall configuration of a DVD playback apparatus according to an embodiment to which the present invention is applied. The DVD reproducing apparatus 100 shown in FIG. 1 includes a spindle motor 12, an optical pickup 14, a feed motor 16, and a servo control unit 18 for reading signals recorded on the DVD 10, and an RF amplifier for amplifying the read signals. 22, digital signal processor 24, four buffer RAMs 26, 34, 38, 4
2, stream separation unit 30, audio decoder 32,
A video decoder 36, a sub-picture decoder 40, a video processor 44, a video encoder 46, a digital-to-analog (D / A) converter 48, an operation unit 58 for a user to input various instructions, and the DVD playback device 1.
00 and a system controller 60 that controls the entire system.

The spindle motor 12 rotates the DVD 10 at a constant linear speed. The optical pickup 14 is a DV
It detects data recorded in D10, and includes, for example, a semiconductor laser and a photodiode.
The feed motor 16 moves the optical pickup 14 in the radial direction of the DVD 10.

The servo controller 18 drives the spindle motor 12 and the feed motor 16 described above,
By moving an objective lens (not shown) built in the optical pickup 14, the focal position of the semiconductor laser is set to DV.
It is moved vertically and horizontally with respect to the recording surface of D10. In addition, the servo control unit 18 performs various servo (focus servo, tracking servo, and rotation servo) controls necessary for reading data from the DVD 10.

The RF amplifier 22 amplifies an electric signal output from a photodiode built in the optical pickup 14. When a large jump or shock is applied to the DVD reproducing apparatus 100 to cause a track jump, the track jump occurs. It also has a function of outputting a detection signal.

The digital signal processing unit 24 includes the RF amplifier 2
2 is converted into digital data and then subjected to signal demodulation processing (8-16 demodulation processing) and error correction processing in accordance with the data format of the DVD 10,
It is stored in the RAM 26. And the digital signal processing unit 2
4 is an RA in response to an instruction from the system controller 60.
The VOBU included in the data stored in M26 is extracted and output to the stream separation unit 30.

The stream separation unit 30 analyzes the pack headers constituting the VOBU output from the digital signal processing unit 24 according to the instruction of the system controller 60, and thereby, the audio pack (A_PCK) and the video pack (V_PCK). , Sub-picture pack (SP_
PCK) and the navigation pack (NV_PCK). The audio pack separated by the stream separation unit 30 is output to the audio decoder 32, the video pack is output to the video decoder 36, the sub-picture pack is output to the sub-picture decoder 40, and the navigation pack is transferred to the system controller 60. .

The audio decoder 32 performs a predetermined decoding process on the audio pack output from the stream separation unit 30, and outputs audio data.
The video decoder 36 performs a predetermined decoding process on the video pack output from the stream separation unit 30, and outputs video data. Sub picture decoder 40
Performs a predetermined decoding process on the sub-picture pack output from the stream separation unit 30, and outputs sub-picture data.

The video processor 44 generates image data in which the video data output from the video decoder 36 and the sub-picture data output from the sub-picture decoder 40 are synthesized in accordance with an instruction from the system controller 60. Output to 46. For example,
Image data is generated by combining subtitle sub-picture data output from the sub-picture decoder 40 with video data output from the video decoder 36.
In the multi-angle playback operation, the video processor 44 simultaneously displays images of all angles according to an instruction from the system controller 60 and allows the user to select a desired angle (multi-angle selection screen). Generates image data necessary for display of. The video encoder 46 converts the image data output from the video processor 44 into video data for display.

The D / A converter 48 converts audio data output from the audio decoder 32 into an analog audio signal. When this audio signal is output from, for example, a speaker (not shown), audio sound is reproduced.

The operation unit 58 includes a playback key for giving an instruction for title playback, a multi-angle selection screen display key for giving an instruction for displaying a multi-angle selection screen in a multi-angle playback operation, left / right / up / down cursor keys, and display. Various operation keys such as a setting key for fixing an item at a cursor position on the screen are provided, and a signal corresponding to an operation state of the key is output to the system controller 60.

The system controller 60 controls all functional blocks, such as outputting various servo commands to the servo controller 18 and outputting an image generation instruction corresponding to a user's operation instruction to the video processor 44. Further, the system controller 60 receives and analyzes the VMGI and VTSI included in the data output from the digital signal processing unit 24 and the NV_PCK output from the stream separation unit 30, and reproduces the data with respect to the stream separation unit 30 and the like. Performs various controls necessary for operation.

In the multi-angle reproduction operation, when the multi-angle selection screen display key provided on the operation unit 58 is pressed and the display of the multi-angle selection screen is instructed, the system controller 60 responds to this instruction. Various controls necessary for displaying the multi-angle selection screen are performed accordingly.

The entire DVD player 100 described above serves as data playback means, the system controller 60 serves as playback procedure control means, the operation unit 58 serves as selection instructing means and display instructing means, and the system controller 60, the video decoder 36,
The video processor 44 corresponds to the selection menu creating means.

(3) Operation of DVD Playback Apparatus FIG. 9 is a flowchart showing an operation procedure of angle switching in the DVD playback apparatus 100 described above. The system controller 60 determines whether the user has loaded the DVD 10 (step 100). DVD10
Is loaded, the system controller 60 displays the opening screen for a predetermined time (step 1).
01), a title menu screen is displayed (step 102). For example, based on PGCI (program chain information) included in VMG (video manager),
A VOB (video object) corresponding to the opening screen is read, and a predetermined opening screen is displayed. Further, since the reproduction position of the title menu displayed next to the opening screen can be specified based on the PGCI_UT (program chain information unit table) in the VMGI, the display operation of the title menu is started.

Next, the system controller 60 determines whether a title to be reproduced has been selected (step 103). When the user operates the cursor key of the operation unit 58 to select the title displayed in the title menu, and further presses the setting key to confirm the title selection, the system controller 60 determines the contents of the selected title. Start playback (step 10).
4).

In the above-described example, a case has been described in which, for example, a demonstration screen of a movie company is displayed as an opening screen. However, there are cases where this opening screen is not provided. In addition, there is not always a title menu, and there is a DVD in which the first title is automatically reproduced even if there is no title menu. In these cases, after the loading of the DVD is detected in step 100, the process automatically proceeds to step 104 and the reproduction of the title content is started.

After the contents of the title have been reproduced, the system controller 60 determines whether or not display of a multi-angle selection screen has been instructed (step 105).
When the user presses the multi-angle selection screen display key of the operation unit 58 and instructs the display of the multi-angle selection screen as a selection menu, the system controller 60 sets the multi-angle It is determined whether the function is enabled (step 106).

If the multi-angle function is enabled, the system controller 60 performs an operation of displaying a multi-angle selection screen including a plurality of angle images having the same reproduction timing (step 10).
7). For example, as shown in FIG. 6, when the interleaved block to be processed includes four cells, each cell contains one angle of video data, and That is, the system controller 60 uses the four pieces of video data to display a multi-angle selection screen to the video processor 44 because the entire video block contains four angles of video data. Instructs to generate image data. In response to this instruction, the video processor 44 performs predetermined editing processing (image reduction or the like) on the four pieces of video data output from the video decoder 36 to display image data for displaying a multi-angle selection screen. Generate The generated image data is converted into an analog image signal via the video encoder 46. Then, the multi-angle selection screen is displayed by outputting this analog image signal to, for example, a display device (not shown).

FIG. 10 is a diagram showing an example of the multi-angle selection screen. As shown in the figure, on the multi-angle selection screen, images 201 to 204 of all angles are reproduced in a reduced state. In addition, image 2 of each angle
01 to 204 are not limited to moving images and may be still images or frame-by-frame images. When displaying a moving image as an image at each angle, V
_PCK data must be read in parallel,
It is necessary to increase the rotation speed of the spindle motor 12 to increase the data reading speed. For example, when four moving images are displayed at the same time as shown in FIG. 10, it is necessary to read data at least four times or more. In the display example shown in FIG. 10, the four images 201 to 204 to be selected are evenly arranged. However, any one of the images 201 to 204 may be displayed on the background portion 205.

When the multi-angle selection screen is displayed,
Next, the system controller 60 determines whether the angle has been selected (step 108). When the cursor key of the operation unit 58 is operated and the cursor is positioned on one of the angle images displayed on the multi-angle selection screen, the setting key is pressed within a predetermined time after the multi-angle selection screen is displayed. When the angle selection is confirmed, the system controller 60 terminates the display of the multi-angle selection screen (step 109) and performs an operation of switching the angle by processing the ILVU corresponding to the selected angle (step 11).
0).

If the angle is not selected within a predetermined time after the multi-angle selection screen is displayed (when a negative determination is made in step 108), the system controller 60 ends the display of the multi-angle selection screen. (Step 111).

Angle switching operation (step 11)
0), the display of the multi-angle selection screen (step 111), the multi-angle function is not effective (if negative in step 106), or the display of the multi-angle selection screen Is not instructed (if a negative determination is made in step 105), the system controller 60 determines whether or not the reproduction of the title content has been completed (step 11).
2). When the reproduction of the title content ends, the system controller 60 ends a series of reproduction operations. If the reproduction of the title content has not been completed, the system controller 60 determines again whether or not the display of the multi-angle selection screen has been instructed (step 10).
5).

As described above, when the user instructs the display of the multi-angle selection screen, the DVD reproducing apparatus 100 of this embodiment displays the multi-angle selection screen in response to the instruction, and displays the multi-angle selection screen. Play the images simultaneously,
When any one of these angle images is selected, a reproduction operation for switching to the selected angle image is performed. Therefore, the user can grasp the contents of the image at the switching destination in advance before performing the angle switching, and can directly switch to the desired image. This eliminates the need for a wasteful operation, such as a conventional operation, in which the image to be switched is not the one desired by the user and the user has to issue an angle switching instruction again, thereby simplifying the operation. Become.

Since the multi-angle selection screen is displayed only when the user instructs the display of the multi-angle selection screen, the multi-angle selection screen is displayed even if the user does not want to switch the angle. Thus, it is possible to prevent the image of each angle from being reproduced. In addition, on the multi-angle selection screen,
Since each of the images at each angle is displayed in a reduced size, it is easy to grasp the contents of the image at each angle, and an accurate selection operation can be performed.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment described above, the images at each selectable angle are reproduced simultaneously, but a plurality of selectable subtitles may be displayed simultaneously. In this case, in response to an instruction from the system controller 60, the video processor 44 displays the subtitle selection screen shown in FIG. 11 based on a plurality of subtitle sub-picture data output from the sub-picture decoder 40. Generate image data. Then, when any of the subtitle images displayed on the subtitle selection screen is selected, the system controller 60 performs a reproduction operation for displaying the selected subtitle.

[0049]

As described above, according to the present invention, a selection menu is displayed in which a plurality of screens having the same reproduction timing and selected alternatively are arranged and displayed. When one of the images is selected, a reproduction operation corresponding to the selected image is performed, and the user sequentially displays a plurality of images having the same reproduction timing and selects a desired image from among the images. There is no need to perform an operation of selecting an image, and a desired operation can be selected from a plurality of images having the same reproduction timing by a simple operation.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a volume space of a DVD.

FIG. 2 is a diagram showing a data structure of a VMG.

FIG. 3 is a diagram showing a data structure of a VTS.

FIG. 4 is a diagram showing an example of the structure of a PGC.

FIG. 5 is a diagram showing a data structure of a VOB.

FIG. 6 is a diagram illustrating an example of an ILVU.

FIG. 7 is a diagram showing a data structure of a cell.

FIG. 8 is a diagram illustrating an overall configuration of a DVD playback device according to an embodiment.

FIG. 9 is a flowchart showing an operation procedure in the case where angle switching is performed in the DVD playback device of one embodiment.

FIG. 10 is a diagram illustrating an example of a multi-angle selection screen.

FIG. 11 is a diagram showing an example of a subtitle selection screen.

[Explanation of symbols]

 Reference Signs List 10 DVD 18 Servo control unit 24 Digital signal processing unit 30 Stream separation unit 32 Audio decoder 36 Video decoder 40 Sub-picture decoder 44 Video processor 58 Operation unit 60 System controller

Claims (4)

[Claims] 1. A data reproducing means for reading out a signal recorded on a disk-type recording medium to reproduce an image and a sound, and a reproducing operation performed by the data reproducing means has the same reproduction timing and is selectively selected. Selection menu creation means for creating a selection menu in which a plurality of images are arranged and arranged; selection instruction means for giving an instruction to select any of the plurality of images to be selected included in the selection menu; A disc reproducing apparatus comprising: a reproducing procedure control unit that instructs the data reproducing unit to perform a reproducing operation corresponding to an image selected and selected by the selection instructing unit. 2. The image processing apparatus according to claim 1, wherein the plurality of images included in the selection menu are reduced images of images corresponding to a plurality of photographing directions that can be selectively selected during a reproduction operation. Disc playback device. 3. The display device according to claim 1, further comprising a display instruction unit for instructing the display of the selection menu, wherein the selection menu is generated by the selection menu generation unit when an instruction is given by the display instruction unit. A disc reproducing apparatus characterized by performing the following. 4. The disc reproducing apparatus according to claim 1, wherein the selection menu creating unit displays a plurality of images included in the selection menu screen as moving images.