JPH11110950A - Recording medium reproducing method and recording medium reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reproductions which are rich in variations by providing navigation information managing video information, voice information and subvideo information and making a device so as to reproduce not only a default value but also to make angles to be changed over in every fixed time even when a user does not select them in the case there are angle data on a recording medium. SOLUTION: A control program is provided with navigation data and reproduces a recording medium on which angle data are recorded according to the navigation information. The program has a step judging the presence or absence of the angle data, a step incrementing angle numbers when the angle data are present and a step in which an incrementing means manages a time incrementing the angle numbers. When the user selects the reproducing of the angle data, when this device reproduces the angle data for a fixed time, the device is automatically changed over to next incremented angles successively to perform reproductions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium reproducing method and a recording medium reproducing apparatus for reproducing a recording medium such as an optical disk capable of recording and reproducing a plurality of screens of video information in a simultaneous sequence.

[0002]

2. Description of the Related Art At present, as a large-capacity optical disk capable of recording and reproducing video information and audio information, a digital video
Disks (DVDs: Digital Video Disks) have become widespread. DVDs use MPEG2 (Moving Pi
main image information (video data) compressed by the data compression method of cture image coding Expert Group 2), audio information (audio data) such as audio or music, and sub-image information (characters converted to bitmap data) Sub-picture data) and time-division multiplexed recording
Then, each data is recorded as a video stream, an audio stream, and a sub-picture stream. For one series of video streams, up to eight audio streams and up to 32 sub-picture streams can be recorded. It is possible.

[0003] DVDs have various special reproduction functions, one of which is multi-angle reproduction. That is, in a DVD, one scene can be recorded as video information of a plurality of angles captured from a plurality of angles, and the video information of the plurality of angles can be selectively reproduced (multi-angle reproduction).

[0004] Multi-angle reproduction for reproducing video information of different angles includes a first type reproducing video information having the same temporal progress from the start to the end of reproduction of the multi-angle, and a multi-angle reproduction of each multi-angle. There is a second type of reproducing video information whose temporal progress differs depending on the video information.

In a first type of multi-angle reproduction for reproducing video information having the same time progress from the start to the end of reproduction of a multi-angle, for example, in the case of live video such as a concert, the video of the first angle is a singer. Full body image of
One of the videos having the same temporal progression can be reproduced, such as a video in which the singer's face is raised in the second angle and a video of the entire concert hall in the third angle.

In addition, a second method for reproducing video information having different temporal progression according to each multi-angle video information.
In multi-angle playback of the type of, for example, if the batter hits the home run and the ball pitched by the pitcher hits the home run, and the stadium is loud cheers, the first angle of the video hits the bat with the ball away from the pitcher's hand, The image of the ball flying to the spectator seat, the image of the second angle is the image of the pitcher throwing the ball from the set position, the batter hits the home run and the ball is flying, and the image of the third angle is the image of the batter being the ball One of the images having different temporal progression can be reproduced, such as an image in which a ball jumps into a spectator seat from the moment of hitting.

As a video data compression method, in the case of moving image data, since there is often data having correlations before and after, a method of transmitting information by motion and compressing the image, and a low spatial frequency high frequency component in a natural image are small. For example, there is a method of compressing a high-frequency component by expressing a coefficient having a high probability of the number of zeros of a high-frequency component with a small number of bits. MPEG (Moving Picture Image Coding Expert Gr
oup) is the international standardization of the video data compression method. At present, MPEG2 has been internationally standardized, and it is possible to perform efficient compression using a variable rate using data having the same number of pixels as that of the current TV broadcast. Video,
MPEG2 for synchronous playback of audio and other data
The system layer is also specified. In the MPEG2 system layer, it is specified that a transfer start time and a reproduction time, in which each data is expressed using a reference time, are set so that a moving image, an audio, and data thereof can be synchronously transmitted and reproduced.

[0008] However, although only the information of the transfer start time and the reproduction start time has no problem in normal reproduction, special reproduction such as fast forward and rewind reproduction and reproduction processing such as providing the system with interactivity can be performed. It is said to be difficult.

For this reason, as described in Japanese Patent Application Laid-Open No. 08-273304, a standard having navigation data for navigating data has been proposed in order to enable special playback such as fast forward and rewind playback. I have.

[0010]

In the above-described multi-angle reproduction, the disc producing side sets the multi-angle reproduction. If the menu display is ON or the default value is set in the setting of the playback conditions of the DVD player, a mark indicating that angle playback is possible is displayed on the front panel of the DVD player during playback of the disc, or A plurality of angle images are displayed on the small screen on the screen, and the user is notified that the image is an angle reproduction part.

However, when a menu screen or a small screen is displayed on the screen in the middle of a movie or the like, there is a drawback that the main picture is disturbed.

[0012] In the setting of the DVD player, if the display of the angle reproduction is not displayed or the default value is set, only one angle video is always reproduced in the portion where the angle reproduction is possible even if the reproduction is repeated. Therefore, there is a disadvantage that it is not possible to obtain an image with a variety of angles.

More specifically, when reproducing the data including the navigation data, the user can switch the angle. However, when the user does not select, the default value is selected. If you play without it, the video always plays only the same angle. In addition, there is a drawback that it is annoying to display that the angle can be switched during reproduction, and if there is no display, the angle switching position cannot be known without reading the manual each time.

According to the present invention, when the recording medium has angle data, even when the user does not make a selection, instead of reproducing only the default value, the angle is switched at regular time intervals so that the presence or absence of the angle switching can be recognized. It is another object of the present invention to provide a recording medium reproducing method and a recording medium reproducing apparatus capable of performing a variety of reproductions.

[0015]

In order to achieve the above object, the invention according to claim 1 comprises navigation information for managing a reproduction state of video information, audio information and sub-video information, and the video information is transmitted at the same time. In a reproducing apparatus for reproducing a recording medium provided with angle data of video from a plurality of angles with respect to a reproduced video, angle data detecting means for detecting whether or not the recording medium has angle data; In this case, there is provided a time management means for managing the timing of switching a plurality of angle data, and an angle switching means for sequentially switching the angle data based on the time management means.

According to a second aspect of the present invention, there is provided video information,
A reproduction method for reproducing a recording medium provided with video angle data from a plurality of angles with respect to a video reproduced at the same time, comprising navigation information for managing a reproduction state of audio information and sub-video information. It is characterized by detecting whether or not there is angle data, and when there is angle data on the recording medium, the angle number indicating the angle data is sequentially changed at a fixed timing, and a plurality of angle data are sequentially switched and reproduced. And

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a recording medium reproducing device according to the present invention. Referring to FIG. 1, the recording medium reproducing apparatus includes navigation information for managing a reproduction state of video information, audio information, and sub-video information, and the video information is a video from a plurality of angles with respect to a video reproduced at the same time. Angle data detecting means 21 for detecting whether or not the recording medium has angle data, and a plurality of angle data when the recording medium has the angle data. Time management means 22 for managing the timing of switching between
And angle switching means for sequentially switching angle data based on the time management means.

In such a configuration, the angle data detecting means 21 detects whether or not angle data is recorded on a recording medium (for example, an optical disk). )
The time management unit 22 and the angle switching unit 23 can sequentially change the angle number indicating the angle data at a fixed timing, and can switch and reproduce a plurality of angle data.

That is, in the recording medium reproducing apparatus shown in FIG.
The time management unit 22 and the angle switching unit 23 use the time management unit 22 and the angle switching unit 23 when reproducing a recording medium including video information and audio information and sub-video information including angle data of video from a plurality of angles with respect to the same time playback video. Since the angle can be automatically changed, a variety of images can be obtained.

FIG. 2 is a diagram showing a logical format of a recording medium (optical disk) reproduced by the recording medium reproducing apparatus of FIG. In FIG. 2, a data recording area from a lead-in area to a lead-out area of a recording medium (optical disc) is a volume and file structure having a hierarchical structure, and includes a volume and file structure area, a video manager, and at least one video. It has a title set and other recording areas.

Here, the file structure area is the micro U
This is a management area defined in DF and ISO9660.
The video manager is composed of a plurality of files starting from file # 1, and the video manager describes information for managing a video title set. Each video title set is composed of a plurality of files, like the video manager. Each video title set includes compressed video data, audio data and sub-picture (sub-picture) data, and Is stored. More specifically, a plurality of video title sets are limited to a maximum of 99, and the number of files constituting each video title set is set to a maximum of 10. These files are similarly partitioned by logical sector boundaries.

FIG. 3 is a diagram showing the structure of the video manager. In FIG. 3, a video manager is a video object set for volume manager information (VMGI) and a video manager information menu (VMGI).
(VMGM_VOBS) and a backup (VMGI_BUP) of the video manager information.

Here, the video object set for VMGM (VMGM_VOBS) stores video data, audio data and sub-picture data of a menu relating to the volume of the optical disk managed by the video manager.

The volume manager information (VMGI) arranged at the head of the video manager includes a video title set such as information for searching for a title and information for reproducing a video manager menu.
(VTS) is described. That is,
The volume manager information (VMGI) records at least three tables: a volume management information management table (VMGI_MAT), a title search pointer table (TT_SRPT), and a video title set attribute table (VTS_ATRT).

A volume management information management table (VMGI_MAT), which is a first table, is an essential table, and includes a size of a video manager, a start address of each information in the video manager, and a video object set for a video manager menu. (VMC
M_VOBS) is described.

A title search pointer table (TT_SRPT), which is a second table, contains video titles contained in a volume on the optical disc which can be selected in accordance with the input of a key of the apparatus and a title number from a display unit. An entry program chain (EPGC) is described.

As shown in FIG. 4, a program chain is a set of programs for reproducing a story of a certain title, and a movie of one title is reproduced by continuously reproducing the program chain. It is completed. Thus, a user can watch a movie from a particular scene of the movie by specifying a program in the program chain.

The video title set attribute table (VTS_ATRT) which is the third table contains the video title set (VT) in the volume of the optical disc.
The attribute information defined in S) is described. More specifically, a video title set (VTS) is used as attribute information.
Number, video title set (VTS) number, video stream attribute (video data compression method, etc.), audio stream attribute (audio encoding mode, etc.), sub-picture attribute (sub-picture display type, etc.) Is described.

FIG. 5 is a diagram showing a structure of a video object set (VOBS) of the video manager.
In FIG. 5, the video object set (VOBS) includes a menu type and title type video object set (VOBS). That is, the video title set is included in the video object set (VOBS).
(VTS) menu video object set (V
TSM_VOBS) and a video object set (VTSTT_VOBS) for titles of at least one or more video title sets (VTS) (see FIG. 6 described later). Each video object set differs only in its use. , Have a similar structure.

That is, the video object set (V
OBS) has at least one video object (VO
B) defined as a set of video object sets
The video objects in (VOBS) are of the same purpose. Video object set for menu (VO
BS) is composed of one video object (VOB) and stores data for displaying a plurality of menu screens. On the other hand, a video object set for title set (VTSTT_VOBS) (see FIG. 6 described later) is composed of a plurality of video objects (VOB).

Also, the video object (VOB) includes
An identification number (IDN # j) is added, and a video object (VOB) can be specified by the identification number. A video object (VOB) is composed of one or more cells. A normal video stream is composed of a plurality of cells, but in the case of a menu video stream, a video object (VOB) may be composed of one cell.

The cell has a cell identification number (C_IDN # j)
And a cell is specified by the cell identification number (C_IDN # j). When the angle is changed, the angle is changed by specifying the cell identification number. Here, each cell is composed of one or a plurality of video object units (VOBUs), and each video object unit (VOBU) starts with at least one navigation pack (NAV pack) as shown in FIG. Is defined as a pack sequence having

That is, the video object unit
In (VOBU), GOPs composed of video packs (V packs), sub-picture packs (SP packs), and audio packs (A packs) defined by the MPEG standard are arranged to form a video data stream. I have.
Here, the playback time of the video object unit (VOBU) corresponds to the playback time of video data composed of one or more GOPs included in the video object unit (VOBU), and the playback time is 0. .4 seconds or more and not more than 1 second. In MPEG, one GOP is usually 0.5 seconds, and is defined as compressed screen data for reproducing about 15 images during that time.

FIG. 6 shows a video title set (VT)
It is a figure which shows the structure of S). In FIG. 6, each video title set (VTS) includes video title set information.
(VTSI), a video title set menu video object set (VTSM_VOBS), and a video title set backup (VTSI_BUP) are described.

Here, the title video object set (VTSTT_VOBS) of the video title set,
The video title set information (VTSI) includes a video title set information management table (VTSI_MAT) and a video title set direct access pointer table.
(VTS_DAPT), video title set program chain information table (VTS_PGCIT), video title set time search map table (VTS_M)
APT).

The video title set information management table (VTSI_MAT), which is the first table, is an essential table, and includes the size of the video title set (VTS), the start address of each information in the video title set (VTS), The attribute of the video object set (VOBS) in the video title set (VTS) is described.

The video title set direct access pointer table (VTS) which is the second table
_DAPT) is an optional table provided as needed, and includes a program chain included in the video title set that can be selected according to a title number input from a key operation / display unit of the apparatus. (P
GC) and / or a program (PG).

The third table, a video title set program chain information table (VTS_P)
GCIT) is a mandatory table that contains V
TS program chain information (VTS_PGCI) is described.

The video title set time search map table (VTS_MAP) which is the fourth table
T) is an optional table provided as needed, and includes a table for recording video data in each program chain (PGC) of a title set to which the map table (VTS_MAPT) belongs for a predetermined display time. Information about the position is described.

FIG. 7 shows the structure of the VTS program chain information table (VTS_PGCIT). FIG.
In the information table (VTS_PGCIT), V
Information on TS program chain (VTS_PGC)
(VTS_PGCI) is described. That is, the information table (VTS_PGCIT) includes an information table (VT) related to the VTS program chain (VTS_PGC).
VTS_PGC for searching information (VTS_PGCIT_I) of S_PGCIT) and VTS program chain (VTS_PGC) in information table (VTS_PGCIT)
Search pointer (VTS_PGCIT_SRP), VTS
Information on the program chain (VTS_PGC) (V
TS_PGCI) is described.

FIG. 8 shows PGC information (VTS_PGC).
It is a figure which shows the structure of I). In FIG. 8, PGC information (VTS_PGCI) in the VTS program chain information table (VTS_PGCIT) includes general program chain information (PGC_GI), a program chain program map (PGC_PGMAP), a cell reproduction information table (C_PBIT), and a cell position information table. (C_P
OSIT) is described.

Here, as shown in FIG. 4, the program chain general information (PGC_GI) in the PGC information (VTS_PGCI) includes a program chain (PGC) category (PGCI_CAT) and a program chain (PGC).
Contents (PGC_CNT) and program chain (P
GC) (PGC_PB_TIME). The PGC category (PGCI_CAT)
Whether copying of the PGC is possible,
Whether or not reproduction of the program in the GC is continuous or random reproduction is described.

In FIG. 5, a playback control information (PCI) packet and a data search information (DSI) packet are arranged in the navigation (NAV) pack of the video object unit (VOBU).

Here, the playback control information (PCI) data of the playback control information (PCI) packet includes navigation data for changing display contents in synchronization with the playback state of the video data in the video object unit (VOBU). In the reproduction control information (PCI) data, PCI general information (PCI_GI) as information on the entire PCI and angle information (NSLS_ANGLI) as each jump angle information at the time of angle change are described.

The angle information (NSLS_AN)
GLI) describes the start address (NSLS_ANGC_DSTA) of the angle cell at the jump destination by the number of angles. The start address is determined from the logical sector of the navigation (NAV) pack in which the playback control information (PCI) data is recorded. Are described in relative logical sectors.

In the case of an angle change based on the angle information, as shown in FIG.
(PCI) The start address of the video object unit (VOBU) in which the data is recorded, or the start address of the video object unit (VOBU) in another angle block having the closest reproduction time before the reproduction time is the angle cell. Start address (NSL
S_ANGC_DSTA).

The data search information (DSI) data of the data search information (DSI) packet is navigation data for executing a search for a video object unit (VOBU), and the data search information (DSI) data includes: DSI general information (DSI_GI), angle information (SML_AGLI), video object unit
Search information (VOBU_SI) and synchronous reproduction information (SYNCI) of (VOBU) are described.

In the angle information, the start address (SML_S) of the angle cell at the jump destination corresponding to the number of angles is included.
AGLI_DSTA), and the start address is described as a logical sector relative to the logical sector of the navigation (NAV) pack in which the data search information (DSI) is recorded.

In the case of an angle change based on this angle information, as shown in FIG. 10, another angle after the reproduction time of the video object unit (VOBU) in which the data search information (DSI) data is recorded is displayed. A start address of a cell in the block is described.

In such a configuration, the presence / absence of angle data on the recording medium (optical disk) is detected by the angle data detecting means 21, and if there is angle data, the angle data is transmitted by the time management means 22 and the angle switching means 23. The indicated angle numbers are sequentially changed at a fixed timing, and a plurality of angle data can be switched and reproduced.

That is, when playing back a recording medium including video information and audio information and sub-picture information with video angle data from a plurality of angles with respect to the same time reproduced video, the angle is automatically changed. Since it can be changed, a video rich in change can be obtained.

FIG. 11 is a diagram showing a specific example of a recording medium reproducing apparatus according to the present invention. Referring to FIG. 11, in the recording medium reproducing apparatus, an optical disk as a recording medium 1 is driven to rotate by a spindle motor 2, and information is reproduced from the optical disk 1 by a pickup 11.

Here, the output from the pickup 11 is
In addition to the reproduction amplifier (RF amplifier) 3, the reproduction amplifier 3 extracts a focus error signal or a tracking error signal from the output of the pickup 11 and
And a reproduction signal is binarized and supplied to the disk decoder / system management unit 5.

The servo circuit 4 comprises, for example, a focus servo, a tracking servo, a spindle servo, a slide servo control circuit, and the like. The focus servo and the tracking servo control circuits have a focus error signal and a tracking error signal of 0, respectively. And a function to correctly trace the pickup to the recording track. The servo circuit 4 also supplies the CPU 9 with information indicating the operation states of the various components to be servo-controlled as described above.

The CPU 9 is connected to a CPU memory 9a, a key input display section 10, and a disk decoder / system management section 5. Here, the key input display unit 10
The key input display unit 10 can display information such as information on the optical disk 1 from the user.

The disk decoder / system management unit 5 is provided with a RAM 5a and a timer 5b. Further, a video decoder 6 is connected to perform reproduction processing of video information, and performs reproduction processing of audio information. To do
An audio decoder 7 is connected, and a sub-picture decoder 8 is connected to perform sub-picture information reproduction processing.

In the reproducing apparatus having such a configuration, when the power is turned on and the optical disk 1 is loaded, the CPU 9 executes an initial operation program. In the initial operation, first, the pickup 11 is moved to the inner periphery, the laser is turned on, the presence or absence of the optical disk 1 is confirmed, and the optical disk 1 is rotated. When the optical disk 1 is not mounted, the state is displayed on the key input display section 10. When the optical disk 1 is mounted, the optical disk 1 is determined, and various settings and adjustments are made based on the determination result. Subsequently, the CPU 9
Turns on the focus, adjusts the focus,
After adjusting the balance of the tracking error signal, the tracking is also turned on and fine adjustment of the focus is performed. Then, the rotation of the spindle is controlled to the CLV using the reproduction signal, reading is started from the lead-in area of the optical disc 1 (see FIG. 2), and the data of the area in which the volume and the file structure are defined in accordance with ISO-9660. Is read and stored in the RAM 5a. Then, the CPU 9
Based on the path table and the directory code stored in the M5a, necessary information such as the recording position and the recording capacity of each file is stored in the CPU memory 9a.

Next, the CPU 9 sets the recording position information and the recording capacity information of the file stored in the memory 9a on the basis of the information.
A video manager (see FIG. 3) composed of a plurality of files starting from the file number 0 is read and stored in the memory 9a. The start address of the video object set VOBS for the video manager menu can be obtained from the volume manager information management table VMGI_MAT, which is the first table of the video manager stored in the memory 9a, and the menu object set is reproduced. (See FIG. 5). If there is no video manager menu, the start address of the title set search pointer table is obtained from the volume manager information management table VMGI_MAT, and the information of the title set search pointer table is obtained (see FIGS. 6 and 7).

When an input number is input from the key input display section 10, the CPU 9 uses the input number obtained by the key input to select a title corresponding to the input number from the acquired title set search pointer table information. A search pointer is selected to obtain a video title set number, a program chain number, and a start address of the video title set. When there is only one title set, one title search pointer is obtained regardless of the key input, and the start address of the target title set can be obtained.

The video for the volume menu described in the information management table of the volume manager,
Based on the number of audio and sub-picture streams and their respective attribute information, the respective video decoder 6, audio decoder 7, and sub-picture decoder 8 use CP for reproducing the video manager menu parameters.
Set by U9.

That is, the video title set information of the title set is acquired from the start address of the video title set, and the number of streams of audio and sub-pictures in the video title set information management table of the acquired video title set information and the video, audio, The parameters of the playback device are set based on the attribute information of the sub-picture data.

The start address of the video object set for the video title set menu is obtained from the video title set information management table, the video title set is reproduced, and the menu of the video title set is displayed. In this case, when playing the video object set for the title in the title set without referring to the menu and selecting the program chain, the video title set information management table is used to retrieve the video title set title from the video title set information management table. The video object set is reproduced with reference to the video object start address.

On the other hand, when a program chain is selected by a user's key operation from the key input display section 10, first, the program chain information table of the video title set described in the video title set information management table is selected. The start address is obtained and the information of the video title set program chain information table is read. From this information, the number of program chains and the end address of the table are obtained.

Next, when a program chain number is designated by a key operation, a video title set program chain corresponding to the program chain category and the search pointer is obtained from the search pointer of the video title set program chain information title corresponding to the number. A start address of information is obtained, and general program chain information is read by the start address. Based on the general information, the category of the program chain, the reproduction time, etc., and the start addresses of the cell reproduction information table and the cell position information table are obtained, and the cell reproduction information table and the cell position information table are obtained from the start addresses.

First VOB of cell described in cell playback information
The target cell is searched by obtaining the start address of U and the start address of the last VOBU. The cell playback order is determined with reference to the program chain program map. The determined cell is read from the video object and written into the memory, and data is sent to the video decoder 6, the audio decoder 7, and the sub-picture decoder 8 and decoded based on the reproduction time information.

That is, a program chain number, an angle number, an audio stream number, and a sub-picture stream number at which reproduction is started are determined according to the key-input reproduction conditions, and reproduction is performed.

When a key operation is performed during reproduction, the content is written in the memory 9a. If there is no key operation, it is checked whether or not the reproduction has ended. If the reproduction has not been completed, it is checked whether the transfer of the navigation pack has been completed. If the transfer of the navigation pack has been completed, the logical sector number of the navigation pack is stored in the memory as the current logical block number.

It is determined from the stored logical block whether or not it is the last navigation pack of the cell. The determination is made by comparing the start address of the last VOBU in the cell of the cell reproduction information table with the address of the navigation pack. If it is the last navigation pack, it is checked whether an angle change has been input.

If there is no angle change, it is checked whether it is the last cell of the program chain. The check method is determined by the last cell in the table of cell reproduction information, that is, by the number of cells constituting the program chain and the identification number of the reproduced cell.

If it is the last cell in the program chain, it is determined that the program chain has ended, and the next program chain is designated. Since the program chains are normally reproduced in numerical order, the number of the program chain to be reproduced next is set by adding 1 to the number of the reproduction end program chain. It is checked whether there is a set number. If there is no number, a reproduction end routine is executed. If there is, a cell of the next program chain is reproduced. That is, the start address of the first VOBU in the cell of the cell reproduction information is obtained as the current logical block address. If the obtained address is equal to a value obtained by adding 1 to the address of the last cell of the previous program chain, it is a continuous cell reproduction, so the process returns to the key input. When the cell data has been completely taken in, the data taking-in by the drive is temporarily stopped, and then the data reading of the next cell is carried out.

When the angle is changed, it is checked whether the angle data exists. The presence or absence of an angle is described as angle information in both the PCI data and the DSI data of the navigation pack.

In the angle switching using PCI, the switching operation can be started immediately after the switching operation is performed, and the destination to be reached can be determined in VOBU units. Further, it is not necessary to be continuous in time, but the image stops when switching.

Angle switching using the DSI is performed by performing an ILVU (interleave unit) when the switching operation is performed.
After the end, the process goes to the next ILVU, and the image is reproduced continuously without interruption.

If there is no angle data to be changed, a message indicating that there is no angle data is displayed on the key input display section 10.

On the other hand, if there is angle information, the angle number specified by key input is specified. Seeks to the target address of the angle cell corresponding to the specified angle number.

For example, if images of three angles (angle 1, angle 2, angle 3) as shown in FIG. 12 are recorded as shown in FIGS. 13 (a) and 13 (b), angle 1 is If selected, the cell at angle 1 is selected, seek is performed so that the VOBU of that cell is reproduced, and the image in FIG. 12A is reproduced. Next, when the angle 2 is selected, a cell of the angle 2 is selected, a seek is performed so that the VOBU of the cell is reproduced, and the image of FIG. 12B is reproduced. Similar processing is performed at the angle 3. In this example having only three angles, the processing is not performed even if four or more angles are keyed.

In this case, automatic angle switching is performed as follows. In other words, automatic angle switching
Even when no key input is specified, the angle is switched at regular time intervals. For example, FIGS. 12 (a), 12 (b), and
The images of three angles 1, 2, 3 as shown in (c) are
13 (a) and 13 (b), the angle numbers 1, 2, 3 are automatically incremented, and the angles 1, 2, 2 in FIGS. 12 (a) to 12 (c) are automatically incremented. 3 are reproduced in order. When the image at angle 3 in FIG. 12C is reproduced, the next angle number becomes 1 and
The image of the angle 1 of 2 (a) is reproduced, and the angle number is automatically incremented again and the angle is continuously switched.

FIGS. 14 to 18 are flowcharts for explaining the processing operation of the recording medium reproducing apparatus according to the present invention. Referring to FIGS. 14 to 18, when reproducing a recording medium (optical disc), the volume manager information (VMGI) is read and stored by referring to the video manager of the logical format (FIG. 2) of the optical disc (FIG. 2). Step S1). Next, a title set to be reproduced is determined (step S2), and a cell reproduction information table (C_PBIT) corresponding to the title set to be reproduced is read and held (step S3). Thereby, the playback start PGC number, angle number, audio stream number, and sub-picture stream number are determined (step S4). And a sub-picture stream number,
The audio stream number and the start ATC are provided to the system management unit 5, and the start address and the PGC number are provided to the system memory, that is, the RAM 5a (step S5). Next, a read command is given to the drive unit (step S6).

Then, it is determined whether a key input has been made from the key input display section 10 (step S7). If a key input has been made, the process proceeds to search and other processing (step S8). On the other hand, when it is determined in step S7 that there is no key input, it is determined whether or not the reproduction has ended.
(Step S9) If the reproduction is not ended, it is determined whether or not there is a setting for automatic angle switching (Step S9).
10). If automatic angle switching is not set during reproduction, normal reproduction is performed. That is, it is determined whether the navigation pack transfer has been completed (step S1).
1), if the navigation pack transfer has been completed, N
V_PCK_LSN is set to NOWLBN and VOB
The U last address is set in ENDLBN (step S12). Next, it is determined whether or not the cell (CELL) is the last navigation pack (step S13).
If it is the last navigation pack of L), P
It is determined whether the cell is the last cell (CELL) of the GC (step S1).
4) When it is the last cell (CELL) of the PGC,
It is determined whether or not there is the next PGC (step S15). If there is the next PGC, it is replaced with the next PGC (step S16). That is, when the cell (CELL) is the last cell (CELL) of the PGC, the next PGC is searched,
The PGC cell (CELL) is reproduced. And
The next cell (CELL) is searched (step S17), and the process returns to step S7. Also, in step S16,
If there is no next PGC, the process proceeds to step S33 described later.

If the automatic angle switching has been set in step S10, it is first determined whether or not the counter has the maximum value N (step S18). Value N is set to "1"
Is incremented by one, the process proceeds to step S11, and P
A reproduction loop of a GC cell (CELL) is performed. This determines the timing at which the angle is switched, and can be set arbitrarily. If not set arbitrarily, a fixed value is set.

If the value of the counter is the maximum value N in step S18, the counter is cleared (step S20), and it is determined whether or not there is another angle data (step S21). If there is no other angle data, the process proceeds to step S11, and normal reproduction is performed. On the other hand, if there is another angle data in step S21, it is determined again whether or not there is an angle switch setting (step S22). If there is an angle switch setting, the automatic angle switch setting is released. Then (step S23), counting is started. Then, it is determined whether the user has switched the angle, and the set angle number is newly set (step S24). This is to maintain the interactivity with the user, and when there is an angle to be viewed, the angle number can be set and does not automatically change. Therefore, if it is desired to perform automatic angle switching again, it is necessary to set automatic angle switching.

If there is no angle switching by the user in step S22, it is determined whether the current angle number Na is the maximum value MAXNa (step S25). If the angle number Na is the maximum value MAXNa, the angle number is set to 1 (step S26). ). The current angle number Na is the maximum value MAXN
If not a, the angle number Na is incremented by "1" (step S27). And angle number Na
Is set, it is determined whether the angle switching is seamless switching (DSI data or not) (Step S).
28). In the case of seamless switching, the next VOBU is searched (step S29), and the process proceeds to step S11 to perform normal reproduction. On the other hand, if seamless playback is not performed in step S28 (angle switching is not seamless switching), when the angle is changed, the video and sub-picture are set to the bose state, and the audio is muted. Then, the system time lock of each section of the reproducing apparatus is stopped, the buffer of each decoder section is cleared (step S30), and the data of the next angle is awaited (the next VO).
BU is searched) (step S31). And when the first navigation pack of the next angle data comes,
Navigation pack SCR described in DSI general information
And set the system time clock. Thereafter, each decoder is returned to the normal state (step S32). Then, the process proceeds to step S11 to perform normal reproduction.

As described above, when it is determined in step S9 that the reproduction has been completed, and when it is determined in step S16 that there is no next PGC, the process proceeds to step S33. In step S33, it is determined whether the STC is VOBU_EPTS, and if the STC is VOBU_EPTS,
The screen display is stopped (step S34), a data transfer stop command is set in the drive unit (step S35), and the process ends.

That is, according to the present invention, more specifically, when a recording medium on which data including navigation data is recorded is reproduced in accordance with the navigation data, means for judging the presence or absence of angle data, normal reproduction, Input means for switching the reproducing method of the present invention, means for incrementing an angle number when angle data is present, and means for managing the timing at which the increment means performs the increment by time, and the input means of the present invention is provided by the input means. When playback is selected, if there is angle data, after the playback for a certain period of time, the next incremented angle is automatically switched and played back.

As described above, the angles are automatically switched in order when the angle comes to a point where the angles can be switched. Therefore, when a recording medium (disc) with the angle switching is reproduced, it is not displayed that the angle switching is performed. Both
Can indicate that there is an angle switch,
Even if the user does not make a key input at the angle switching place, the reproduction is performed while performing the angle switching, so that a variety of images can be obtained.

In the present invention, when the angle is changed by the user during the above-mentioned reproduction, the reproduction method of the present invention can be switched to the normal reproduction method.

[0087]

As described above, according to the present invention, navigation information for managing the reproduction state of video information, audio information, and sub-video information is provided, and the video information is provided in a plurality of times for the video reproduced at the same time. In a reproducing method for reproducing a recording medium provided with angle data of an image from an angle, the presence / absence of angle data is detected, and if there is angle data, the angle number indicating the angle data is sequentially changed at a fixed timing. (I.e., playback of a recording medium including video information including angle data of video from a plurality of angles and audio information and sub-video information with respect to the video played back at the same time). Sometimes, the angle can be automatically changed), so that a variety of images can be obtained.

That is, when the angle comes to a point where the angle can be switched, the angle is automatically switched in order. Therefore, when a recording medium (disc) with the angle switching is reproduced, it is not necessary to indicate that the angle switching is being performed. It is possible to indicate that there is an angle switch, and it is possible to obtain a variety of images because the reproduction is performed while performing the angle switch even if the user does not perform a key input at the angle switch location. In other words, if there is angle data and the user does not make a selection,
Rather than reproducing only the default value, the angle is switched at regular time intervals so that the presence or absence of the angle switching can be recognized, and a variety of reproduction can be performed. Further, when the user switches the angle, the automatic angle switching is switched to the normal reproduction mode, so that the angle selected by the user does not change without permission.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a recording medium reproducing device according to the present invention.

FIG. 2 is a diagram showing a logical format of a recording medium (optical disc) reproduced by the recording medium reproducing apparatus of FIG.

FIG. 3 is a diagram showing a structure of a video manager.

FIG. 4 is a diagram for explaining a program chain.

FIG. 5 is a diagram showing a structure of a video object set (VOBS) of a video manager.

FIG. 6 is a diagram showing a structure of a video title set (VTS).

FIG. 7 shows a VTS program chain information table (VT)
FIG. 3 is a diagram showing the structure of (S_PGCIT).

FIG. 8 is a diagram showing the structure of PGC information (VTS_PGCI).

FIG. 9 is reproduction control information of a reproduction control information (PCI) packet.
(PCI) Angle information described in the data (NSL
FIG. 10 is a diagram for describing an angle change based on (S_ANGLI).

FIG. 10 is a diagram for explaining an angle change based on angle information (SML_AGLI) described in data search information (DSI) data of a data search information (DSI) packet.

FIG. 11 is a diagram showing a specific example of a recording medium reproducing device according to the present invention.

FIG. 12 is a diagram illustrating an example of three angle images.

FIG. 13 is a diagram for describing reproduction of images at a plurality of angles.

FIG. 14 is a flowchart illustrating a processing operation of the recording medium reproducing device according to the present invention.

FIG. 15 is a flowchart illustrating a processing operation of the recording medium reproducing device according to the present invention.

FIG. 16 is a flowchart illustrating a processing operation of the recording medium reproducing device according to the present invention.

FIG. 17 is a flowchart illustrating a processing operation of the recording medium reproducing device according to the present invention.

FIG. 18 is a flowchart illustrating a processing operation of the recording medium reproducing device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording medium 2 Spindle motor 3 Reproduction amplifier 4 Servo circuit 5 Disk decoder / system management part 6 Video decoder 7 Audio decoder 8 Sub picture decoder 9 CPU 10 Key input display part 11 Pickup 21 Angle data detection means 22 Time management means 23 Angle switching means

Claims (2)

[Claims] 1. A recording medium comprising navigation information for managing a reproduction state of video information, audio information, and sub-video information, wherein the video information includes angle data of video from a plurality of angles with respect to a video reproduced at the same time. In a playback device that reproduces, angle data detection means for detecting whether or not there is angle data on the recording medium, and when the recording medium has angle data, time management means for managing the timing of switching a plurality of angle data, A recording medium reproducing apparatus, comprising: an angle switching means for sequentially switching angle data based on time management means. 2. A recording medium comprising navigation information for managing a reproduction state of video information, audio information and sub-video information, wherein said video information comprises angle data of video from a plurality of angles with respect to a video reproduced at the same time. In the playback method for playing back, it is detected whether or not there is angle data on the recording medium, and if there is angle data on the recording medium, the angle number indicating the angle data is sequentially changed at a fixed timing, and the A recording medium reproducing method characterized by sequentially switching and reproducing.