JP2001086469A - Information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information reproducing device capable of returning the transient state of reproducing original (before one or two states) when reproducing an information recording medium such as optical disk. SOLUTION: This device is provided with reproducing means 2, 3, 5, 6, 8, 10 and 16 for reproducing information recorded on the information recording medium in prescribed order, recording means 2 and 7 for recording restoration information required for restoring and reproducing a prescribed picture when this prescribed picture is reproduced by the said reproducing means, operating means 12 for inputting an operating instruction for restoring and reproducing a picture reproduced in the past, and reproducing control means 2, 3, 5, 6, 7, 8, 10 and 16 for restoring and reproducing the said prescribed picture reproduced in the past on the basis of the restoration information recorded in the said recording means when the operating instruction for restoring and reproducing the picture reproduced in the past is inputted by the said operating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a DVD (Digita
The present invention relates to an information reproducing apparatus with improved operability at the time of reproducing an information recording medium such as a video disk.

[0002]

2. Description of the Related Art In recent years, a system for reproducing an optical disk on which video (moving image), audio, and the like are recorded has been developed. This DVD video (DVD-RO
The M) standard supports MPEG2 as a moving picture compression method and linear PCM as an audio recording method in addition to AC3 audio according to the MPEG2 system layer. Further, this DVD video standard is configured by adding sub-picture data obtained by run-length-compressing bitmap data for subtitles, and control data (navigation data) for reproduction control such as fast-forward / rewind data search. In addition, this standard requires that IS09660 and U.S.
It also supports the DF bridge format.

Further, the DVD standard has a multi-angle function (moving image data of various camera angles which are simultaneously progressing is recorded in a time-division manner, and only the angle desired by the user to be viewed can be selectively reproduced. Function), a menu function (main video data and sub-video data are combined to display a menu, and a simple command called a button command is used to jump to a scene desired by the user, or to select a voice or subtitle desired by the user. Function to select the type of), etc., so that the user can enjoy an interactive way like never before.

[0004] The title creator can freely produce various menus and interactive movies using the multi-angle function. In particular, the menu is special reproduction data for allowing the user to interactively select content. The menu contains playback data and highlight information (HLl)
Made by. Menus can have buttons. The user can select a button by specifying the button number or by moving the highlight through a user interface such as a cursor.

There are two types of menus, system menus and interactive menus. The system menu includes a video manager menu (VMGM) and a video title set menu (VTSM). Further, the system menu includes a title menu (a menu for selecting a title), a root menu (a menu for accessing another VTSM, and a menu for making a selection that is difficult to be classified into another VTSM), and an audio menu.
Menu (menu for audio stream selection),
There are six types of sub-picture menu (menu for selecting a sub-picture stream), angle menu (menu for selecting an angle number), and PTT menu (menu for selecting a PTT number). All system menus are invoked by specific user functions and navigation commands. Menus can also be inserted in the title to implement an interactive program. In this case, it is called an interactive menu.

[0006]

As described above, the DV
As a result of incorporating various functions into the D standard, the key operations of the playback device are correspondingly complicated. Therefore, it may be difficult for general users to understand the operation of the key depending on the content of the title or the key name alone. In particular, current DVD players often have two types of buttons for calling a menu, and one of these buttons is a video manager menu (VMG).
M), and a key for calling a video title set menu (VTSM) is assigned to the other.

When the title creator creates a menu with a deep hierarchy, the user selects the menu screen that appears one after another in an interactive manner and proceeds through the menu screen. In this case, there are many situations in which the user accidentally presses a button or selects the button once, but still wants to select a different button.
In such a case, the video manager menu (VMGM) or the video title set
You have to call the menu (VTSM) and answer the interactive menu again while proceeding.

[0008] The interactive menu is a menu created in the title, and is currently mainly used for the multi-story function. This multi story feature
This is a work in which the story being reproduced can be branched by the user's selection, but after the selection is made from the menu screen at the time of this branch, it is usually impossible to return to this menu screen again.

On a DVD disc, it is possible to specify a menu button selection validity period. If the specified period is exceeded, the button number set in the disc is forcibly selected and executed. Is done. if,
If this selection period expires while thinking about which button the user selects on the menu screen, he / she wants to return to the menu screen immediately and make his / her intended selection again. You cannot return to the menu screen.

An object of the present invention has been made in view of the above-mentioned circumstances, and has as its object to provide the following information reproducing apparatus.

(1) An information reproducing apparatus capable of restoring the transition state of reproduction (returning to the previous or next previous state) when reproducing an information recording medium such as an optical disk.

(2) At the time of reproducing an information recording medium such as an optical disk, after the transition state of reproduction is returned to the original state (after being returned to the previous one or two before), the transition state of the reproduction is changed again. An information playback device that can be undone (one step forward, two steps forward).

[0013]

In order to solve the above-mentioned problems and achieve the object, an information reproducing apparatus of the present invention reproduces (reproduces) a predetermined screen (such as a menu screen) when the predetermined screen is reproduced. For recording necessary data (eg, the address of data for reproducing a predetermined screen on a disc) and operation buttons (an undo button and a redo button) for inputting an operation instruction for returning to the predetermined screen displayed in the past
And a reproduction control unit that displays a predetermined screen that has been displayed in the past in accordance with an operation instruction input via an operation button based on data stored in the memory.

Thus, the user can undo the operation performed by himself / herself or further return the operation that has been returned by simply pressing the operation button.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an information reproducing apparatus according to the present invention. As shown in FIG. 1, the optical disc reproducing apparatus 1 includes an MPU unit 2, a video decoder unit 3, a digital / analog conversion unit (D
/ A unit) 4, optical disk drive unit 5, system processor unit 6, memory unit 7, SP (sub-picture) decoder unit 8,
An audio decoder unit 9, a video processor unit 10, and a remote control transmission / reception unit (infrared communication unit) 11 are provided. Further, the optical disk reproducing device 1 includes a remote control unit 12, a TV 16, and a speaker unit 17 for controlling the entire optical disk reproducing device.

The remote control unit 12 includes an infrared communication unit 13, a microcomputer unit 14, and a key unit 15. The remote control unit 12 is used for various instruction operations from the user, such as reproduction, stop, fast forward, rewind, presence / absence of subtitle display, channel selection, menu selection, etc. of the optical disk. The basic flow of the data is as follows. The MPU unit 2 sends a target address and a read command to the optical disk drive unit 5, and the optical disk drive unit 5 reads logical sector data from the disk according to the sent command, and the data input unit. The read pack data is sent to the system block unit 7 through.
The system processor section 7 divides the read pack data into packet data, transfers video packet data (MPEG data) to the video decoder section 3 and transfers audio packet data to the audio decoder section 11 according to the purpose of the data. Then, the sub-picture packet data is transferred to the SP decoder unit 10, and the NV pack is stored in the memory unit 7 for processing by the MPU unit.

Each of the transmitted data is subjected to a reproduction process in synchronization with a PTS (Presentation Time Stamp) value in the packet data and an STC (System Time Counter) in the system, and a moving picture with audio subtitles is displayed on the TV 16. Can be played.

The optical disk stores data in a normal file format as shown in FIG.
The title corresponds to, for example, one movie, and one disc includes a plurality of titles. A collection of these tights is called a title set, and the title set is composed of a plurality of files.

In addition, one disc contains Video Man as information for managing video data of this disc.
ager (hereinafter referred to as VMG). The title set includes Video Title Set Information (hereinafter VTS) as information for managing the title set.
Called I. ), A video file composed of video data, and a back file of VTSl.

Further, as shown in FIG. 3, the video file has a hierarchical structure, one title set is composed of a plurality of program chains, and one program chain is composed of a plurality of programs. One program is composed of a plurality of cells, and one cell is composed of a plurality of video object units (hereinafter V
It is called OBU. ). Further, the video object unit is configured by a pack including a plurality of various data. A pack is composed of one or more packets and a pack header. A pack is a minimum unit for performing data transfer processing. Further, logical processing is performed on a cell-by-cell basis, thereby changing the reproduction order, branching, and the like.

In the DVD-Video system, a simple language called a navigation command is prepared in order to enhance interactivity. This command can be executed before and after reproduction of the program chain, after reproduction of the cell, after reproduction of the VOBU, and during NV pack processing. Among them, HLl (High Light Information) in the NV pack includes information on buttons used in menus and the like during VOBU playback.

The basic reproduction procedure including these operations will be described below with reference to the flowcharts shown in FIGS. The reproducing procedure described below is executed by the information reproducing apparatus shown in FIG.
Information recorded on a disc (information recording medium) is reproduced in a predetermined order.

FIG. 4 is a flow chart for explaining an example of the operation from when the optical disc is set in the disc reproducing apparatus shown in FIG. 1 until the reproduction process is started.

When an optical disk is set in the optical disk reproducing device (disk drive unit 5) (ST10), MP
U2 reads the information of the lead-in area (ST1).
2) Read the volume information of the disk (ST1)
4). From the volume descriptor in the read information, the MPU 2 identifies whether the disc is a DVD disc.

For example, based on the physical reflection conditions and information on the lead-in area, it is determined that the disc is not a DVD disc but a CD (ST16, NO) (ST16).
18, YES), and enters a CD reproduction process.

If the information read is "the disc is a DVD
If it contains information indicating that it is a video disc (ST16, YES), MPU 2 reads the record of the root directory (ST20).

When the disc set in the optical disc reproducing apparatus (disc drive section 5) is neither a DVD nor a CD (ST16, NO, ST18, NO), the reproducing operation ends.

Next, the MPU 2 searches the read root directory record for a subdirectory in which DVD video data (data of the video title set VTS) is stored (ST22).

If the searched subdirectory is not a VTS directory (ST24, NO), and another subdirectory exists in the root directory record (ST24).
26, YES), the sub-directory is searched again, and it is checked whether the searched directory is a VTS directory (ST22 to ST24). VTS
If no directory is found and there are no other subdirectories (ST26, NO), the reproduction operation ends.

If the searched subdirectory is a VTS directory (ST24, YES), MPU2 reads the record of the VTS subdirectory (ST2).
8).

Next, the MPU 2 searches each file of the VTS from the read VTS subdirectory record (ST30). The searched file is a management data file VIDEO_TS. Although not an IFO (ST32,
NO), if the file is not the last file in the VTS subdirectory, that is, if there are other files in the VTS subdirectory (ST34, NO),
File search again and the searched file is VIDEO_
TS. A check is made to see if the data is an IFO (S
T30 to ST32). VIDEO_TS. If the IFO file is not found and there are no other files (ST3
4, YES), the reproduction operation ends.

The retrieved file is a management data file VIDEO_T containing the video manager information VMGI.
S. If it is an IFO (ST32, YES), the MPU 2 shifts to the normal reproduction processing of the DVD disk.

FIG. 5 is a flowchart for explaining an example of normal reproduction in the optical disk reproducing apparatus shown in FIG.

First, the MPU 2 executes the management data file VIDEO_TS. The video manager information VMGI is read from the IFO (ST10).
0).

Next, the MPU 2 sets the number N of reproducible title sets and other various settings in accordance with the description contents of the video manager information VMGI (ST10).
2) Execute the processing of the video manager menu (S
T104).

Subsequently, the MPU 2 reads the title search pointer table TT_SRPT (ST106),
A video manager menu is constructed and displayed so that a user can select a title set to be played.

The user operates the key section 15 of the remote controller 12 (not shown cursor key and enter key).
When a desired reproduction title is selected by the operation of (1), a reproduction title number M (M is 1 or more and the number of reproducible title sets N or less) corresponding to the selected title is determined (ST108).

When the reproduction title number M is determined, the MPU
2 is a title search pointer table TT_SRPT
The corresponding video title set information VTSI address is determined (ST110), and the video title set information management table VTSI_MAT is read from the disc (ST112).

Subsequently, the MPU 2 reads information (the number of streams, attributes, etc.) relating to the video, audio and sub-picture of the title to be reproduced from the video title set information management table VTSI_MAT. The SP decoder unit 8 is initialized (ST114).

After that, the MPU 2 executes the processing of the video title set menu of the title to be reproduced (ST1).
16). From this video title set menu, the user can select, for example, English as the playback audio (audio) and Japanese as the playback subtitle (sub-picture).

FIG. 6 is a continuation of the flowchart of FIG. First, the MPU 2 executes the part-of-title search pointer table information PTT_SRPT of the title to be reproduced.
I is read (ST118).

Next, MPU 2 executes the processing of the VTS menu according to the description contents of PTT_SRPTI so that the user can select n playback title units (corresponding to a chapter in the case of a movie) (ST120).

When a specific reproduction title unit is selected from the menu by the user, MPU 2 reads the corresponding part-of-title search pointer table PTT_SRPT (ST122).

Thereafter, the program chain number PGCN and the program number PGN of the reproduction title unit to be reproduced are set from the contents of the read PTT_SRPT (ST124).

Next, the MPU 2 reads the program chain information table PGCIT to be reproduced (ST12).
6) Save all the data in the work memory (ST1)
28). Thus, the program chain PGC to be reproduced is determined.

When the reproduction program chain PGC is determined, it is checked whether the PGC is a parental block PGC (ST130). This check is performed by checking the program chain category VTS_PGC included in the program chain search pointer PGCI_SRP in the program chain information table PGCIT to be reproduced.
This is performed according to the description of _CAT (bit contents of block mode).

If it is a parental block (ST13)
0, YES) Predetermined parental processing is performed (ST1)
32). When the operation corresponds to the parental operation, that is, when the reproduction of the block is prohibited (ST134,
YES) The reproduction program chain number PGCN is incremented by one, and the reproduction is shifted to the reproduction of the next PGC (S
T136). Then, it is checked again whether the shifted PGC corresponds to the parental operation (ST).
134). The above processing (ST134 to ST13) is performed until a program chain number that does not correspond to parental is reached.
6) is repeated.

If the program chain does not correspond to the parental operation (ST134, NO), the program chain information PGCI corresponding to the program chain number PGCN corresponding to the program chain is extracted (ST138). Thereafter, various initial settings such as determination of the color palette of the sub-picture and determination of the reproduction audio channel are performed (ST140).

FIG. 7 is a continuation of the flowchart of FIG. First, the MPU 2 reads the cell address table information VTS_C_ADT of the title to be reproduced (ST1).
42). Then, all data of VTS_C_ADT is stored in the work memory (ST144).

Next, the MPU 2 extracts the command table PGC_CMDT of the program chain to be reproduced (ST146) and executes a pre-command of the program chain PGC (ST148).

Subsequently, the MPU 2 stores the program number, the cell ID number and the like in the work memory (ST150), and determines whether the cell to be reproduced from now on is to be reproduced randomly or normally (ST152).

When performing random reproduction (ST152,
YES) generates a random number R using a random function (ST154), and reproduces a cell having a cell ID number corresponding to the generated random number R (ST156).

If not random reproduction (ST152, N
In the case of O), normal cell reproduction processing is performed (ST15).
8). In this cell playback processing, VTS_CP in the video title set cell address table VTS_C_ADT is used.
Cells with ID numbers corresponding to I # 1 to VTS_CPI # n are sequentially reproduced.

When the cell reproduction is completed, the MPU 2 sets the cell still time written in the cell category C_CAT of the cell (ST160), and executes the cell still for the set time (ST162). For this cell still, the screen of the last frame of the cell that has just been reproduced can be used.

When the cell still execution (still image display) for the set time is completed, a predetermined post command is executed (ST164), and the program chain number PGCN is updated (ST166).

If the updated program chain number is not zero, that is, if there is still a program chain to be reproduced (ST168, NO), the process jumps to ST130 and repeats until all PGCs have been reproduced.
The processing from 130 to ST166 is repeated.

If the updated program chain number is zero, that is, if the reproduction of all the program chains ends (ST168, YES), the normal reproduction processing ends.

The cell reproduction process in ST156 or ST158 is performed as shown in FIG.

In the flowchart of FIG. 8, when cell reproduction is started (ST400, YES), MPU 2
The reproduction start address is determined from the contents of the program chain information PGCI (ST404). After that, MPU2
Sets a data read command in the disk drive unit 5 (ST406).

Instead of starting the cell reproduction (ST400, N
O), when the VOBUs are not continuous (ST402,
NO), the processing of ST404 to ST406 is executed.
If cell playback is not started (ST400, NO) and VOBUs are continuous (ST402, YES), ST40
Steps 4 to ST406 are skipped.

Subsequent to the above processing, the MPU 2
The navigation pack at the head of the OBU is loaded into the work memory (ST408), and synchronization information is set (ST410).

Further, MPU 2 processes the PCI packet in the navigation pack (ST 412). The PCI packet includes reproduction control information PCI, and the PCI includes general information PCI_GI of the PCI. In ST412, the MPU 2 executes a highlight process using the highlight information HLI in the PCI,
User control information VOBU_UOP_C in PCI_GI
An operation for prohibiting a specific user operation is executed using the TL.

Here, as the highlight processing, for example, a sub-picture frame surrounding a selectable item displayed on a menu is highlighted in a color such as green, and when the user decides to select the item, the color is changed to red. There are processes such as changing.

The above-mentioned user operation prohibition operation includes:
For example, a remote controller 12 not shown by the user
Even if an angle key (not shown) of the key section 15 is pressed, the angle switching operation is prohibited, and a mark indicating that the key operation is not possible is displayed on the monitor TV.

At the same time, a backlight LED of an angle key (not shown) of the key portion 15 of the remote controller 12
Is turned off, and processing for notifying the user that the angle key is invalid at that time is also executed in conjunction with the user operation prohibition.

When the processing of ST 412 is completed, MPU 2
It is checked whether it is a VOBU still (ST41)
4).

When performing VOBU still (for example, cell playback information C_PB of program chain information PGCI)
I cell playback mode is “1”) (ST414, YE
S), the MPU 2 waits until the reproduction of the VOBU ends (ST416). Since the playback time of one VOBU is about 0.4 to 1.2 seconds, the standby time is not very long.

When the reproduction of the VOBU is completed, VOBU still processing is started at the end of the reproduction (ST418).
For example, the last frame appearing in the VOBU is reproduced as still. This still reproduction is continued until the user presses a reproduction key (not shown) of the key unit 15 of the moat controller 12 or a reproduction key of an operation key panel (not shown) of the optical disk reproducing apparatus.

In ST414, if the user does not press the pause key (not shown) of the key unit 15 of the remote controller 12, or if the user presses the play key (not shown) of the key unit 15 of the remote controller 12 during the VOBU still processing (ST414, NO), the MPU 2 uses the VO
It is checked whether it is the end of the cell including the BU (ST42).
0).

If it is not the last cell (ST420, N
O) Return to ST408, fetch the navigation pack of the next VOBU, and repeat the processing of ST408 to ST420. If the end of the cell (ST420, YE
S), and waits until the reproduction of the VOBU at that time ends (ST422).

Thereafter, a cell still process is started, and the last frame of the cell is reproduced as a still until the time set by the cell still time in the program chain information PGCI elapses (ST424). This cell still processing ST424 corresponds to ST162.

After executing the cell still, if there is a cell command (one of navigation commands) (ST426, YE
S) After executing the command, the process returns to FIG.
If there is no competing command (ST426, NO), the process returns to FIG.

The 8-bit content of the cell still time is 0.
If it is 000000b, it is specified that it is not a still, and if it is 11111111b, a timeless still is specified and it is 00000001b to 11111b.
In the case of 110b, the decimal number (1 to
254) is specified as a still display having a length in seconds.

The cell command number indicates the number of a cell command (one type of navigation command) to be executed at the end of reproduction of the cell.

The reproduction procedure described with reference to FIGS. 4 to 7 can be summarized as shown in the following 1) to 26).

1) When a disk is inserted, a volume descriptor (LBN = 0300000) in the disk is inserted.
H) is read, and it is confirmed that this disc is a DVD disc. (Check that Standard Identifier = "CD001".) 2) Read the record in the root directory and read the DVD.
Directory "VlDEO_ containing video data"
TS ”.

3) Search for VMGl (“VlDEO_TS.IFO”) from under the VlDEO_TS directory, and read in the VMGI.

4) According to VMG1, the VMG menu is reproduced, and the title set to be reproduced is determined.

5) The address of VTSl of the determined title set is read from VMGl_TT_SRPT.

6) The VTS1 of the selected VTS is read, and each decoder is initialized for the reproduction operation.

7) The VTS menu is reproduced according to VTSl, and the title set unit to be reproduced is determined.

8) VTS which is the reproduction order of the title set unit determined from VTS_PTT_SRPT
_PGCI is read, stored in a work, and a program chain to be reproduced is determined.

9) Initial setting for reproduction of each decoder is performed, and the address of a table used for reproduction is stored.

1O) Execute a pre-processing command for PGCl to be reproduced.

11) Determine a cell to be reproduced. (In the case of random reproduction, a random function is generated and determined.) 12) Cell reproduction processing is performed.

13) It is determined whether or not the reproduced cell is the last cell. If not, the process proceeds to 10).

14) The StiII operation is performed for a designated time. (PGC_STllL) 15) Execute the post-processing command.

16) The next PGC number is read, and the PGC number is read.
If N = 0, there is no next PGC, so the operation end processing is performed, and the operation ends. If you have the next PGC,
The next PGC number is set, and the procedure goes to 8).

17) Playback is started, and it is determined whether the cell is the first cell.

18) It is determined whether the cell is continuous with the previous cell. If the cell is continuous, the process proceeds to 20).

19) A search command is issued to the drive at a target address.

20) Wait for the NV pack to be taken in, and read the data of the NV pack into the work.

21) If the reproduction process is the first, the STC of each decoder is set.

22) NV pack processing is performed. (Highlighting process etc.) 23) Judge whether the cell is the last NV pack,
If it is not the last, go to 19).

24) Wait until the VOBU completes the transfer to the end.

25) Still time is read, and still operation is performed during that time. (Cell Still) 26) It is checked whether or not there is a cell command. If there is, the cell command is processed. If there is no cell command, the processing is terminated as it is.

Next, the points of the present invention will be described.

When the user presses an operation button for determining a state transition on the menu screen by using the key section 15 of the remote controller 12, or when the next transition is determined by the forcible determination button in the case of a menu,
Information for returning the screen (hereinafter referred to as restoration information) is stored in the storage area. The information to be stored is stored in the memory unit 7 in FIG.

The restoration information contains data indicating the following items.

Cell numberReturn destination navigation pack (NV_PCK) address (start address of head navigation pack of cell specified by cell number)

Program chain reproduction control state (the state of loop, random, shuffle reproduction is stored).

• Video title set number • General parameter • System parameter S4 (title number for title domain) • System parameter S5 (VTS for title domain)
・ System parameter S6 (Program chain number for title domain) ・ System parameter S7 (One Sequential PGC Ti
tle PTT number) System parameter S8 (transition state highlight button number) By using the system parameter S8 when restoring the screen, when the screen is restored by the UNDO button (undo button), It is also possible to highlight a previously selected button number and restore the button to the selected state.If this information is not used, the default button number is highlighted and the button is selected. It is also possible.

First, a method of storing restoration information will be described. The number of pieces of restoration information that can be stored depends on the size of the memory in the recording area, and thus differs depending on the system. If it is desired to increase the number of histories, it is sufficient to increase the size of the memory allocated to it. Conversely, if it is desired to use the memory with a reduced amount of memory, the number of histories to be stored may be reduced.

As shown in FIG. 9, for example, the number of stored restoration information is n. The restoration information is added with a history number and an identification flag indicating the presence or absence of valid restoration information. In this case, the number of times of restoration corresponds to this history number. Processing when the player is powered on and when a disc is newly loaded will be described with reference to the flowchart of FIG. This processing is performed during the above-mentioned reproduction processing 1) to 7).

(ST1-0) The player is turned on or the disc is changed.

(ST1-1) This memory area is initialized. In the initialization, the restoration information area is initialized, and the identification flag indicating the presence or absence of the restoration information is cleared. That is, there is no restoration information.

(ST1-2) The input start history number is set to the head history number of the area where the restoration information is recorded.

(ST1-3) End.

Next, the restoration storage method will be described with reference to the flowchart of FIG. This processing is the reproduction processing 22).
Is performed during the NV pack processing.

(ST2-1) It is determined whether a key for determining the next transition has been operated on the menu screen. If there is no key operation, no processing is performed.

(ST2-2) The restoration information when this key operation is performed is written in the area indicated by the input history number.

(ST2-3) The confirmation flag of the written input history number is turned on. As a result, effective restoration information has been written.

(ST2-4) Comparison of the history number (HlST) for inputting restoration information with the maximum number of histories (MAX_HSIT) that can be input. HlST <MAX_H
In the case of 1ST (ST2-5). Otherwise (ST
Go to 2-6).

(ST2-5) The history number is set to the next number. Go to 7).

(ST2-6) The history number is set to the head number of the history number to which the restoration information is input.

(ST2-7) Number of UNDOs (UN
DON) is set to 0.

(ST2-8) End.

Next, the timing of writing the restoration information will be described.

[0120] The MPU 2 shown in FIG.
Information) HL_GI (HighLight general Info)
Since the number of BTN_Ns in the VOBU is one or more, it recognizes that the VOBU is a menu screen. On the menu screen, a button on the menu screen is composed of sub-pictures and highlights, and the user moves the highlighted “selection state” button and operates a key for determination to enter the “determination state”. . After this button is determined, the button command (BTN_CMD) assigned to each button in the button information table (BTNIT) is executed, and the process proceeds to the next step.

In executing this tongue command, the general
In some cases, the value of a parameter is used, or the value of a general parameter is rewritten after the command is completed. Therefore, it is desirable to write the restoration information before the button is pressed and the button command is issued. The MPU 2 can recognize that the button is pressed when the key operated by the user is the determination button. Further, when the menu button selection validity period is set, when the selection validity period has passed, the forced determination selection button number (FOAC_BTNN) becomes “determined state” and the screen changes. Even in this case, it is desirable to save the restoration information before the button command is issued after the selection validity period has passed. As a write timing of the save information, a method of saving the restore information when the MPU 2 recognizes that the currently reproduced one is the menu screen is also conceivable.

Next, a method of executing restoration will be described with reference to the flowchart of FIG.

(ST3-1) Current history number (Hls
T) is stored in the work memory of the MPU2. The history number indicates the number of the area where the restoration information is to be written next.

(ST3-2-1, YES) When the UNDO button is pressed, (ST3-2-2) The number of times the UNDO button is pressed exceeds the number of areas prepared for writing restoration information. Check for any. If it exceeds, go to (ST3-9). (ST3-1-2, NO) UN
Without pressing the DO button, (ST3-2-3) REDO
When the button (redo button) is pressed, the process proceeds to the next step.
(ST3-2-1, NO) (ST3-2-3, NO) U
If neither the NDO button nor the REDO button is pressed,
Go to (ST3-18).

(ST3-3) It is checked whether or not the history number is at the head. If it is the head, go to (ST3-5).
If not, go to (ST3-4).

(ST3-4) The history number is set to the previous number. Go to (ST3-6).

(ST3-5) The history number (HlST) is set to the maximum value of the number of histories. Go to (ST3-6).

(ST3-6) Whether or not restoration information is recorded in this history number is checked with an identification flag. If the restoration information has been written, that is, if the identification flag is valid, go to (ST3-7-1). If the flag is invalid, the restoration information has not been written, and the process proceeds to ST3-9.

(ST3-7-1) The restoration information is developed in the work area of the MPU, and the reproduction is started based on the information. That is, reproduction control based on the restoration information is performed by the MPU.

(ST3-7-2) Restore to screen.

(ST3-8) Number of UNDOs (UD
ON) is increased by one. Go to (ST3-18).

(ST3-9) The user is notified that the restoration information cannot be returned any more. (ST3-18)
What.

(ST3-10) Number of UNDOs (U
Check if (DON) is 0. If it is 0,
(ST3-17) A message indicating that redo cannot be performed is displayed, and the process proceeds to (ST3-18).

(ST3-11) It is checked whether or not the maximum value of an area for writing restoration information prepared with a history number is present. If it is the maximum value, go to (ST3-13).

(ST3-12) The history number is advanced to the next.
Go to (ST3-14).

(ST3-13) The history number is set to the head number of the history number.

(ST3-14) Whether or not restoration information is recorded in this history number is checked with an identification flag. If the restoration information has been written, that is, if the identification flag is valid, go to (ST3-15-1). If the flag is invalid, the restoration information has not been written, and the process proceeds to ST3-17.

(ST3-15-1) The restoration information is developed in the work area of the MPU, and the reproduction is started based on the information.

(ST3-15-2) Restoring to the screen.

(ST3-16) Number of UNDOs (U
DON) by one. Go to (ST3-18).

(ST3-17) The user is notified that the restoration information cannot be further advanced.

(ST3-18) Termination.

FIG. 13 shows an example in which the UNDO key and the REDO key are displayed on a screen and can be operated as a user interface. As shown in FIG. 13, a television screen 101 includes a display unit 102 on which a DVD playback screen is displayed, and an UNDO button 1 drawn by OSD.
03, a REDO button 104 drawn by OSD is displayed.

The user moves the cursor to each button (U
By clicking in accordance with the NDO button 103 and the REDO button 104), the previously described UNDO function,
The operation of the REDO function can be performed.

That is, information necessary for restoring the screen displayed by the user's operation is recorded as restoration information.
By pressing an operation key for returning the operation to the previous state, it is possible to return to the state before the state transition (UNDO). In addition, there may be a case where UNDO has been performed but it is desired to return to the original state. In this case, the operation key (RED) for transitioning the state in the opposite direction to the transition of UNDO
By pressing the (O button), it is possible to transit a state in the opposite direction to UNDO. Further, any or all of the menu screens on which the restoration information is written can be displayed on the screen, selected, determined, and directly returned to the screen.

As described above, according to the present invention, when the user wants to return his or her operation, or when he / she wants to further return the returned operation, the operation key (UNDO) is used.
Button, REDO button) to restore the screen state.

[0147]

According to the present invention, the following information reproducing apparatus can be provided.

(1) An information reproducing apparatus capable of restoring the transition state of reproduction (returning to the previous or previous two) when reproducing an information recording medium such as an optical disk.

(2) At the time of reproduction of an information recording medium such as an optical disc, after the transition state of reproduction is returned to the original state (after being returned to the previous or two previous levels), the transition state of reproduction is changed again. An information playback device that can be undone (one step forward, two steps forward).

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of an optical disc reproducing device corresponding to an example of an information reproducing device of the present invention.

FIG. 2 is a diagram illustrating an example of a directory structure of information (data file) recorded on an optical disc (DVD).

FIG. 3 is a diagram illustrating an example of a hierarchical structure of information recorded on an optical disc (DVD).

FIG. 4 is a flowchart illustrating an operation example from when an optical disc is set in a playback apparatus until the playback processing is started.

FIG. 5 is a flowchart (part 1) illustrating an example of normal playback in the playback device.

FIG. 6 is a flowchart (part 2) illustrating an example of normal playback in the playback device.

FIG. 7 is a flowchart (part 3) illustrating an example of normal playback in the playback device.

FIG. 8 is a flowchart illustrating an example of cell playback in the playback device.

FIG. 9 is a diagram showing a configuration of data for recording restoration information.

FIG. 10 is a flowchart illustrating an example of a procedure for initializing restoration information.

FIG. 11 is a flowchart illustrating an example of a procedure for writing restoration information.

FIG. 12 is a flowchart illustrating an example of a procedure for restoring a reproduction state from restoration information.

FIG. 13 is a diagram showing an example of a case where UNDO and REDO buttons are displayed on a television screen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Optical disk reproducing device 2 ... MPU part 3 ... Video decoder part 4 ... Digital / analog conversion part (D / A part) 5 ... Optical disk drive part 6 ... System processor part 7 ... Memory part 8 ... SP (sub-picture) decoder part 9 audio decoder section 10 video processor section 11 remote control transmitting / receiving section (infrared communication section) 12 remote control section 13 infrared communication section 13 14 microcomputer section 15 key section 16 TV 17 speaker section

Continued on the front page F term (reference) 5B065 BA03 CC07 5C053 FA06 FA24 FA29 GB02 GB06 GB11 GB12 GB38 HA24 HA25 HA29 HA30 HA33 JA12 JA22 JA23 KA05 KA08 KA24 LA06 5D044 AB05 AB07 BC06 CC04 DE24 EF05 GK12

Claims (14)

[Claims] 1. A reproducing means for reproducing information recorded on an information recording medium in a predetermined order, and a recording means for recording, when a predetermined screen is reproduced by the reproducing means, restoration information necessary for restoring and reproducing the predetermined screen. Operating means for inputting an operation instruction for restoring and reproducing a screen reproduced in the past, and when an operation instruction for restoring and reproducing a screen reproduced in the past is inputted by the operation means, the operation means is recorded in the recording means. An information reproducing apparatus, comprising: reproduction control means for reproducing and reproducing the predetermined screen reproduced in the past based on the reproduction information. 2. A reproducing means for reproducing information recorded on an information recording medium in a predetermined order; a recording means for recording restoration information necessary for restoring a plurality of predetermined screens reproduced by the reproducing means in a predetermined order; An operation means for inputting an operation instruction to sequentially restore and reproduce the screen reproduced in the past, and when an operation instruction to sequentially reproduce and reproduce the screen reproduced in the past by the operation means is input, An information reproducing apparatus, comprising: reproduction control means for sequentially reproducing and reproducing a plurality of predetermined screens reproduced in the past in retrospect based on the restoration information recorded in the recording means. 3. A reproducing means for reproducing information recorded on an information recording medium in a predetermined order; a recording means for recording restoration information necessary for restoring a plurality of predetermined screens reproduced by the reproducing means in a predetermined order; Operating means for inputting an operation instruction for sequentially restoring and reproducing a screen reproduced in the past, and an operation instruction for restoring and reproducing a screen reproduced in the past by the first operating means in a retroactive order Is input, a first playback control unit that restores and reproduces a plurality of predetermined screens that have been played back in the past in order based on the restoration information recorded in the recording unit, and the first playback control. Second operation means for inputting an operation instruction for re-restoration reproduction for returning the restoration reproduction by means to a forward dimension; and when the operation instruction for re-reproduction reproduction is input by the second operation means, the second operation means is recorded in the recording means. Was Based on the original information, the first information reproducing apparatus characterized by comprising a second reproduction control means for executing a re-restoration regeneration back to sequentially based restoration reproduction by the reproduction control means. 4. The restoration information according to claim 1, wherein address information indicating a recording destination on an information recording medium of information necessary for restoring a predetermined screen is recorded. An information reproducing apparatus according to claim 1. 5. Information for reproducing an information recording medium in which predetermined information recorded in a predetermined unit and menu information for generating a menu screen for receiving an operation instruction for jump reproduction for reproducing the predetermined information from a predetermined position are recorded. A reproducing device that reproduces information recorded on the information recording medium in a predetermined order; a recording unit that records restoration information necessary for restoring a plurality of menu screens reproduced in the predetermined order by the reproduction unit; An operation means for inputting an operation instruction to sequentially restore and reproduce the screen reproduced in the past, and when an operation instruction to restore and reproduce the screen reproduced in the past in the past is input by the operation means, Playback control means for restoring and playing back a plurality of menu screens played back in the past in order based on the restoration information recorded in the recording means An information reproducing apparatus, comprising: 6. An operation key for inputting an operation instruction for sequentially restoring and reproducing a previously reproduced screen in a retroactive manner on a screen on which a predetermined screen is displayed. The information reproducing apparatus according to claim 5, further comprising a sub-operation means for inputting a key operation accepted via the operated operation key. 7. Information for reproducing an information recording medium in which predetermined information recorded in a predetermined unit and menu information for generating a menu screen for receiving an operation instruction for jump reproduction for reproducing the predetermined information from a predetermined position are recorded. A reproducing device that reproduces information recorded on the information recording medium in a predetermined order; a recording unit that records restoration information necessary for restoring a plurality of menu screens reproduced in the predetermined order by the reproduction unit; Operating means for inputting an operation instruction for sequentially restoring and reproducing a screen reproduced in the past, and an operation instruction for sequentially restoring and reproducing a screen reproduced in the past by the first operating means in the past Is input, and based on the restoration information recorded in the recording means, a plurality of menu screens reproduced in the past are restored and reproduced in order from the past. First reproduction control means, second operation means for inputting an operation instruction of re-reproduction reproduction for returning restoration reproduction by the first reproduction control means to the forward dimension, and re-reproduction reproduction by the second operation means When an operation instruction is input, based on the restoration information recorded in the recording means, a second reproduction control means for executing a re-reproduction reproduction for returning the reproduction reproduction by the first reproduction control means to the forward dimension. An information reproducing apparatus, comprising: 8. The system according to claim 1, wherein the first operation means superimposes an operation key for inputting an operation instruction for sequentially restoring and reproducing a previously reproduced screen on the screen on which the predetermined screen is displayed. And a first sub-operation means for inputting a key operation accepted via the displayed operation key, wherein the second operation means returns the restoration reproduction by the first reproduction control means to a forward dimension. An operation key for inputting an operation instruction for re-restoration reproduction is displayed on the screen on which the predetermined screen is displayed, and a second sub-operation means for inputting a key operation accepted through the displayed operation key is provided. The information reproducing apparatus according to claim 7, comprising: 9. The video data has a video manager for managing the video data and a plurality of video title sets, each video title set includes a plurality of titles and a plurality of program chains, and each program chain includes Each program is composed of a plurality of cells, each cell is composed of a plurality of video object units, each video object unit is composed of a plurality of packs, and each pack is composed of one or more packets and a pack header. An information reproducing apparatus for reproducing an information recording medium on which menu information for generating a menu screen for receiving an operation instruction of jump reproduction for reproducing the video data from a predetermined position is recorded together with the video data. Information recorded in A reproducing means for reproducing in a regular order; a number of the video title set, a number of the title, a number of the program chain, and a number of the cell necessary for restoring a plurality of menu screens reproduced in a predetermined order by the reproducing means. Recording means for recording at least one of the above as restoration information, operation means for inputting an operation instruction for sequentially restoring and reproducing a previously reproduced screen, and a screen reproduced in the past by the operation means When an operation instruction to sequentially restore and play back the past is input, a playback control unit that restores and plays back a plurality of menu screens played back in the past in order based on the restoration information recorded in the recording unit. An information reproducing apparatus, comprising: 10. The information processing apparatus according to claim 1, further comprising: restoration information processing means for clearing restoration information recorded in said recording means when power supply is cut off. The information reproducing apparatus according to claim 5, claim 6, claim 7, claim 8, or claim 9. 11. A restoration information processing means for clearing restoration information recorded in said recording means when an information recording medium reproduced by said reproduction means is removed from a predetermined position. The information reproducing apparatus according to claim 1, claim 2, claim 3, claim 5, claim 6, claim 6, claim 7, claim 8, or claim 9. 12. When a jump reproduction operation instruction is received from a predetermined menu screen, the recording means records restoration information necessary for restoring the predetermined menu screen before the jump reproduction is executed. 10. The information reproducing apparatus according to claim 5, further comprising a control unit. 13. A key operation received via an operation key displayed by said sub operation means is stored, and when a screen on which the operation key is displayed is restored, a status of a key operation received in the past is stored. The information reproducing apparatus according to claim 6, further comprising key operation restoring means for restoring the information. 14. A key operation which is received via operation keys displayed by said first and second sub-operation means is stored, and when a screen on which the operation keys are displayed is restored, it is received in the past. 9. The information reproducing apparatus according to claim 8, further comprising key operation restoring means for restoring the state of the key operation in accordance with the situation.