JPH0918822A - Optical disk player - Google Patents

Abstract

PURPOSE: To provide an optical disk player which is capable of returning a PBC reproduction from a reproduction portion after the reproduction of arbitrary video is performed by interrupting an interactive reproduction while the interactive reproduction is performed. CONSTITUTION: When the interruption instruction from a Track/PBC key switch 14C is performed, a normal reproduction is performed from the reproduction location at the time of the instruction of the interruption under the control of a first reproduction control circuit 13A. When a restart instruction is performed from the Track/PBC switch 14C during the normal reproduction, all the restart information which is possible to be reproduced and instructed by an interactive from a pertinent reproduction location including the reproduction location at the time of a restart instruction is retrieved in a retrieval circuit 13C based on the reproduction information by the interactive form recorded in a video CD. All the retrieved restart information is stored in a memory 18, the restart information corresponding to the instruction by a tenkey switch 14A is read from the memory 18 subsequent to the restart instruction and the interactive reproduction from the reproduction location at the time of the restart instruction is made to be performed under the control of a second reproduction and control circuit 13B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc player, and more particularly to an optical disc player capable of reproducing an optical disc on which video signal data and information for interactive reproduction are recorded.

[0002]

2. Description of the Related Art Conventionally, there is a video compact disc (compact disc is referred to as a CD) as one of video signal recording media capable of interactively reproducing an image. On such a video CD, reproduction information recorded on an optical disk for reproduction by an interactive type (the interactive type is also referred to as playback control or PBC) is recorded together with video signal data. The reproduction information has at least one reproduction list (hereinafter, referred to as a play list) that sequentially specifies the division of the video signal data to be reproduced with respect to the pre-divided video signal data recorded on the video CD. Further, it has one or more branch lists (hereinafter referred to as selection lists) that specify branching to a specific one play list among the above play lists in response to a user's key switch operation.

The play list and the selection list are recorded in a mixed state in a predetermined storage area of the video CD. The video CD player sequentially reproduces the divided video signal data in accordance with the user's key switch operation while sequentially referring to the play list and the selection list, and further selects by branching.
Display it as a series of images for viewing.

[0004] For example, in the case of a movie, a video CD has been created and put on the market in which, when there are a plurality of endings of the content, one of them can be reproduced by the selection of the user. This has a record for branching into a plurality of playlists according to a user's key switch operation based on the selection list as interactive type information in the video CD. It is realized with a description that specifies the image data of the ending of the movie.

[0005]

However, in the case of such a conventional optical disc player, the interactive playback is interrupted, an arbitrary image is played back, and then the interactive playback is restarted from the playback position. There was no optical disc player that could play. That is, taking the case of the video CD shown above as an example, when it is determined that the end of the movie displayed by the branch based on the operation of the user is not preferable for the user, the user returns to the original state and performs the operation again. It means that you cannot do it.

It is an object of the present invention to provide an optical disk player capable of returning to PBC playback from the playback position after interrupting interactive playback and playing back any video during interactive playback. To do.

[0007]

An optical disc player according to the present invention is an optical disc player for reproducing an optical disc by an interactive method, and an interruption instruction means for instructing interruption during reproduction by the interactive method, and a reproduction at the time of instructing the interruption. The first reproduction control means for performing normal reproduction from the position; the restart instruction means for instructing restart of the interactive reproduction during the normal reproduction by the first reproduction control means; and the reproduction position at the time of the restart instruction. Retrieval means for retrieving all resuming information substantially indicating a resumable position which can be instructed to be reproduced interactively from the reproducing position, based on the reproducing information recorded on the optical disc for the interactive reproducing.
A memory for storing all the restart information searched by the search means, a restart information instructing means for instructing one of all the restart information subsequent to the restart instruction, and an instruction by the restart information instructing means. Second reproduction control means for reading corresponding restart information from the memory, and performing interactive reproduction from the reproduction position at the time of the restart instruction based on the restart information read from the memory. Characterize.

[0008]

In the optical disk player according to the present invention, when the interruption instruction is given from the interruption instruction means, under the control of the first reproduction control means, the normal reproduction is performed from the reproduction position at the time of the interruption instruction, When the resuming instruction is given from the resuming instruction means during the normal reproduction by the first reproduction control means, the resuming position which includes the replay position at the time of the resuming instruction and which can be instructed to be reproduced interactively from the replay position is substantially set. All of the restart information indicated by the search means is searched by the search means on the basis of the playback information recorded on the optical disc for interactive playback, and all the restart information searched by the search means is stored in the memory. . When one of all the restart information is instructed by the restart information instructing means following the restart instruction, the restart information corresponding to the instruction by the restart information instructing means is read out from the memory, and the reproduction at the time of the restart instruction is performed. From the position, the interactive reproduction is performed under the control of the second reproduction control means, and the interactive reproduction is restored.

[0009]

The present invention will be described below with reference to examples. FIG.
FIG. 1 is a block diagram showing a configuration of an embodiment of an optical disc player according to the present invention.

The optical disk player of this embodiment is a video CD player. The video CD player of this embodiment has a tray mechanism for mounting the video CD, a clamp mechanism for clamping the video CD on the turntable,
A disc motor for rotating the video CD clamped on the clamp table, an optical pickup for irradiating the video CD with laser light and reading out a signal recorded on the video CD by a change in the diffraction pattern of the returning light, and an optical pickup. A signal is read from a recording signal reading unit 1 that includes a feeding mechanism that drives in the radial direction of the video CD and that reads a recording signal from the rotationally driven video CD.

The focus error signal and the tracking error signal in the output signal read from the optical pickup are supplied to the servo circuit 2, and the servo circuit 2 controls the focus position of the optical pickup to perform the optical pickup. Tracking control for following the track and control of the pickup feed mechanism are performed.

The signal read out from the recording signal reading section 1 is supplied to the EFM demodulation circuit 3 to be supplied to the EFM demodulation circuit 3
Performs EFM demodulation, performs error detection, and performs error correction based on the detected error. The Q channel data of the sub-code in the error-corrected EFM demodulated data is sent to the system controller 13, and data other than the sub-code is CD-data. It is sent to the ROM demodulation circuit 4 and sent to the changeover switch circuit 10 as one input. At the time of demodulation in the EFM demodulation circuit 3, a comparison between the bit clock signal and the reference clock signal is performed.
The rotation control of the disk motor is performed based on the comparison result.

CD receiving the output from the EFM demodulation circuit 3
In the ROM demodulation circuit 4, descrambling corresponding to the CD-ROM format is performed, a sector synchronization signal is detected, and EFM demodulated data is demodulated.
Is sent to the system controller 13 via When the system controller 13 issues a data write instruction to the internal memory of the CD-ROM demodulation circuit 4, the header data is written to the internal memory of the CD-ROM demodulation circuit 4 from the memory address specified by the system controller 13. . System controller 13
When a data writing end instruction comes from the CD-ROM demodulating circuit 4 to the internal memory, the sector synchronizing signal is written and the data writing is ended. Also, CD-ROM
The data written in the internal memory of the demodulation circuit 4 is output to the bus 8 based on an instruction from the system controller 13, and data transfer with the demultiplexer 5 by a dedicated line is also performed.

The demultiplexer 5 supplied with the data from the CD-ROM demodulation circuit 4 is the system controller 1
3, a demultiplex instruction signal is supplied, and the type of the supplied data is classified based on the submode data and the coding information data in the subheader.
The data supplied from the D-ROM demodulation circuit 4 is MPEG.
If it is not a bitstream, the data is discarded,
In the case of an MPEG bit stream, the data is separated into video data and audio data, and sent to the MPEG video decoder 6 and the MPEG audio decoder 9, respectively.

Further, when the intra-frame encoded screen data or the sequence end code in the MPEG bit stream is detected, the sector header address data including the first byte of the data for each data is transmitted via the bus 8 to the system. It is transferred to the controller 13. Further, sector header address data including data currently sent to the coders 6 and 9 in each MPEG is also transferred to the system controller 13 via the bus 8.

The MPEG video decoder 6 which receives the video data sent from the CD-ROM demodulation circuit 4 decodes the video data, decompresses it, converts it into video data, and outputs the audio sent from the CD-ROM demodulation circuit 4. MPEG audio decoder 9 that received the data
In, audio data is decoded, decompressed and converted into audio data.

In the MPEG video decoder 6, video and audio called system clock reference (SCR), decoding time stamp (DTS) and presentation time stamp (PTS) in the data sent from the demultiplexer 5. MPEG video decoder 6 and MP using data for synchronization of
The video signal and the audio signal are synchronized with the EG audio decoder 9. Also, the system controller 1
Based on the instruction from 3, the normal reproduction, fast-forward, and fast-reverse processing are performed.

The output video data from the MPEG video decoder 6 is converted into an analog video signal by the D / A converter 7 and a sync signal is added to the analog video signal for output.

In the MPEG audio decoder 9, the SC in the data output from the demultiplexer 5
Decompression of audio data that has been compressed using data for synchronizing video and audio called R, DTS, and PTS is started. In the MPEG audio decoder 9, data processing such as normal stereo reproduction, monaural reproduction, reproduction of only the left channel, reproduction of the right channel, mute and de-emphasis is performed in response to an instruction from the system controller 13, and audio reproduction is performed. The data is output to the changeover switch circuit 10 as data.

One of the output from the MPEG audio decoder 9 and the output from the EFM demodulation circuit 3 is selected by the changeover switch circuit 10 in response to the instruction from the system controller 13, and the D / A converter 11 outputs an analog audio signal. Is converted to and output.

The system controller 13 is a video CD
Video C in cooperation with memory 16 for storing disc management information including information for PBC reproduction necessary for reproduction
It consists of a microcomputer that controls the D player,
The servo control circuit receives the mechanism control signal from the recording signal reading unit 1, generates a control signal based on the mechanism control signal, and sends the control signal to the servo circuit 2, and also sends normal reproduction, stop, search, and other instructions to the servo circuit 2. 2 and further controls the disc loading mechanism. Further, the Q channel data of the subcode recorded on the video CD is received from the EFM demodulation circuit 3, and the video C is received.
TOC indicating recorded content information recorded on the inner peripheral portion of D
Decrypts data.

Further, the system controller 13 is a CD
-Obtain information such as header data, sub-header data, and synchronization pulse obtained by decoding a signal from the ROM demodulation circuit 4 and obtain TOC data information and management information relating to disc information from the output demodulated by the CD-ROM demodulation circuit 4. The necessary data including the data is transferred to the memory 16 and stored in the memory 16. Further, the system controller 13 instructs the start and end of the data transfer from the CD-ROM demodulation circuit 4 to the demultiplexer 5, and the demultiplexer 5, the MPEG video decoder 6, and the MPE
An operation control signal such as normal reproduction, still and frame feed is output to the G audio decoder 9 to control normal reproduction, still and frame feed.

The video CD player of this embodiment is provided with a memory 18 for storing all restart information searched by a search circuit 13C described later, and the system controller 13 is provided.
Is a first reproduction control circuit 13A for performing normal reproduction from the reproduction position at the time of the interruption instruction from the key switch forming the interruption instruction means for instructing interruption of the PBC reproduction during the PBC reproduction, and the first reproduction control circuit. When a resuming instruction is issued from a key switch that constitutes a resuming instruction means for instructing resuming the replay in an interactive manner during the normal replay by 13A, the replay instruction including the replay position at the time of the resuming instruction is instructed interactively from the replay position. All of the resume information, which indicates substantially the possible resume locations, is provided on a video CD for interactive playback.
From the search circuit 13C that searches based on the reproduction information recorded in section 1, and the key switch that constitutes the restart information instructing means that specifies one of all the restart information that is searched following the reproduction restart instruction. Memory 1 for restart information corresponding to the instruction
The second reproduction control circuit 13 for reading from 8 and performing reproduction in an interactive manner from the reproduction position when the reproduction restart instruction is issued.
B and B are functionally provided. Here, the first reproduction control circuit 13A corresponds to the first reproduction control means, the second reproduction control circuit 13B corresponds to the second reproduction control means, and the search circuit 13C corresponds to the search means.

In the key switch group 14, a ten-key switch 14A, a reproduction instruction key switch 14B, track reproduction for performing track order reproduction, and PBC (playback).
Track / PBC key switch 14 for instructing playback
C, a fast-forward instruction key switch 14D, and a fast-return instruction key switch 14E are provided. The output from the key switch group 14 is sent to the system controller 13, and the video CD player is instructed under the control of the system controller 13. It is controlled to the base state.

Here, the numeric key switches which compose the ten-key switch 14A compose position specifying means. The reproduction instruction key switch 14B and the Track / PBC key switch 14C constitute an interruption instruction means for instructing interruption of the interactive reproduction during the PBC reproduction and a restart instruction means for instructing to return to the PBC reproduction. The fast-forward instruction key switch 14D and the fast-reverse instruction key switch 14E respectively send a fast-forward instruction and a fast-reverse instruction of the reproduction position to the system controller 13 during normal reproduction, and instruct the video CD player under the control of the system controller 13. Control to a state based on.

Reference numeral 15 denotes a display device, which is a display device 15A for displaying normal reproduction in which tracks are reproduced in order, and a display device 15 for displaying PBC reproduction.
B and a display unit 15C for displaying the number of PBC reproduction restart places, and displays the operating state of the video CD player in this embodiment.

Next, the contents recorded on the video CD will be described prior to the description of the operation of the present embodiment. The video CD is divided into tracks # 1 to #n from the lead-in side to the lead-out side as shown in FIG. Information VCD area, entries VCD area, list ID offset table VCD on track # 1
Area, play sequence descriptor (PSD) V
The data is divided into a CD area, a segment play item area, and the like, and each data is recorded.

Moving image data is recorded on the tracks # 2, ..., # (n-2). For example, the CD-DA (as in the conventional compact disc) is recorded on the tracks # (n-1) and #n. The audio data of is recorded. The image data recorded on track # 1 is divided into units called segment play items.
It is recorded only in the segment play item area of track # 1. # Is used to mean a number.

The information VCD area is shown in FIG.
As shown in, the information (VIDEO-CD) for indicating that the mounted disc is a video CD, the address data as the head position information of the first segment play item, that is, the head position of track # 1 is used as a reference. Address data (minutes), (seconds), (frames), etc. are displayed by the time display, and the position of each segment play item can be calculated using the address data at the head position. Video C from this location information
The head recording position and end position of each segment play item on D are obtained.

Next, the recorded contents of the Entry VCD area will be described. Where the entry is related 1
The group moving image is divided to distinguish it from other groups, and the entry VCD area has, as shown in FIG. 4, for example, a track number in which the entry is recorded and entry start position information. Address data, that is, address data (minutes), (seconds), and (frames) by absolute time display on the disc are recorded in the order of entry numbers. By referring to the contents of the entry VCD area, the start position information and the end position information of each entry can be obtained.

In the example shown in FIG. 4, the entry number (00
The entries of (1) and (002) are recorded in track # 2, the entries of entry numbers (003) and (004) are recorded in track # 3, and entry number (00
The entries 5) to (007) are recorded on the track # 4, the entries of the entry numbers (008) to (009) are recorded on the track # 5, and the like. In this case, the entry with the entry number (002) is an additional entry to the entry with the entry number (001), and the entry with the entry number (004) is an additional entry to the entry with the entry number (003). Yes, the entries with the entry numbers (006) and (007) are additional entries to the entry with the entry number (005), and the entry with the entry number (009) is an additional entry to the entry with the number (008). Is.

As is apparent from the above, a group of images in the video track (hereinafter, referred to as play item) is used both when the segment play item in the track # 1 is reproduced and when the track # 2 and above are reproduced. The recording positions on the video CD for the start position and the end position for the first image in () will be known from the contents of the information VCD area and the entry VCD area read from the video CD. Therefore, the contents of the information VCD area and the entry VCD area read from the video CD can be understood from the stored contents of the memory 16 in which the contents are copied.

Next, the list 1 referred to when the PBC is reproduced
The recorded contents of the D offset table VCD area and the play sequence descriptor VCD area will be described. The play sequence descriptor includes a play list and a selection list, and each list is given a list number called a unique list ID.

The list ID offset table is a table for indicating where the target list is recorded in the play sequence descriptor. For example, the list 1D offset table VCD area is shown in FIG.
As shown in, the offset value indicating the list position in the play sequence descriptor (hereinafter, also referred to as a list offset value), that is, the offset value from the start address of the play sequence descriptor data VCD area is recorded.

In the play sequence descriptor VCD area, for example, a play list and a selection list for PBC reproduction are recorded as shown in FIG. Also, one playlist based on the offset value stored in the offset table of the list ID,
Alternatively, one selection list is designated. In the example shown in FIG. 6, the list ID1 offset value
6 is designated, and the selection list 1 of FIG. 6 is designated by the value of the list ID3 offset.

The recorded contents of the play sequence descriptor VCD area include a play list and a selection list. For example, as schematically shown in FIG. 7, a play list is initially recorded with the number of play items in the same play list, and information specifying a plurality of play items to be subsequently reproduced is recorded in the order of reproduction. The play item specified in the recording order is called and reproduced. In this example, entry # 5, track # 6, entry # 1
0, track # 11, segment play item # 1,
It is instructed to reproduce the tracks in the order of # 15. Further, subsequently, the offset value of the list to be reproduced next is recorded, and the reproduction according to the list of the offset value is continued.

Further, the selection list also records information designating one play item to be reproduced (hereinafter, information designating a play item is also referred to as play item designation information). In an example of the selection list, as schematically shown in FIG. 8, the number of branches corresponding to the input of a numeric key switch is recorded following the play item, and then the offset value of the branch destination list is recorded. In FIG. 8, the branch destination offset value is, for example, the list offset C is the offset value of the branch destination list when the number key switch of "3" is input, and the list offset D is reproduced next when there is no number key input. It is the offset value of the list of branches to be branched.

Therefore, in the case of the example shown in FIG. 8, while the play item is being reproduced, as soon as the numeric key switch of "1" is pressed, the process branches to the reproduction of the list designated by the list offset A. Similarly, when the "2" numeric key switch is pressed, the list designated by the list offset B is immediately reproduced, and when the "3" numeric key switch is pressed, the list offset C is designated immediately. The list is played. Also, while the play item is being reproduced, if the numeral key switches of "1", "2", and "3" are not pressed, the list designated by the list offset D is continuously reproduced. This list offset A, B,
C is also called a numeric offset.

Here, what becomes the play item designation information is the segment play item number, each track number after track # 2, and the entry number. When the play item specification information is a segment play item number, the playback range means from the beginning of the segment with the same number as the specified segment play item number to the end of the segment that continues. doing. When the play item designation information is the entry number, the reproduction range means from the beginning of the entry having the same number as the designated entry number to the end of the track including the entry. Further, when the play item designation information is a track number, the reproduction range means from the beginning of the track having the same number as the designated track number to the end of the track.

In this case, for the positions on the video disc of the start position and the end position of the recorded contents of each play item designated by the play item designation information, refer to the recorded contents of the information VCD area and the entries VCD area as described above. What is understood by doing is as described above.

Next, the operation of the video CD player of the present embodiment constructed as described above will be described with reference to FIGS. 9 to 13.
A description will be given based on the flowchart of FIG.

The reproduction process will be described with reference to FIG. A reproduction process is started by pressing the reproduction instruction key switch 14B, and it is first checked whether or not a video CD is mounted (step S1). Whether or not the video CD has been mounted is checked by, for example, determining whether or not the disk has been mounted based on the output of the detection means composed of a light emitting element and a light receiving element that are provided so as to face each other with the mounted disk sandwiched therebetween, and further mounted. This is done by checking if the disc being played is a video CD.

Whether or not it is a video CD is checked as follows. The recording signal reading unit 1, the servo circuit 2, and the EFM demodulation circuit 3 cooperate to read the TOC information recorded in the lead-in area of the disc, and refer to the read TOC information to obtain the video C.
It is determined whether the disc is a predetermined disc including D. When it is determined that the disc is a predetermined disc including a video CD by this determination, the cooperation of the CD-ROM demodulation circuit 4 causes
Information recorded in the information VCD area, the entry VCD area, and the play sequence descriptor VCD area is read and stored in the memory 16. Then V in the information VCD area
It is checked whether or not the information on the VIDEO-CD is recorded. If the information on the VIDEO-CD is recorded by this check, it is determined that the mounted disc is a video CD.

When it is determined in step S1 that it is a video CD, it is checked whether or not there is a request for PBC reproduction (hereinafter, also referred to as PBC reproduction request) (step S2). Whether or not it is a PBC reproduction request is checked by referring to the contents stored in the memory 18.

Here, the Track / PBC key switch 14C is a toggle type switch, reproduction is instructed by the operation of the reproduction instruction key switch 14B, and a PBC reproduction request is issued by pressing the Track / PBC key switch 14C. If the PBC reproduction request is stored in the memory 18 to that effect, the display 15B is turned on at the same time so that the user can visually recognize it.

Subsequently, the reproduction instruction key switch 1
Playback is instructed by the operation of 4B, and Trac
When the k / PBC key switch 14C is pressed, a normal reproduction request for reproducing in track order is made. Memory 1
No. 8 is recorded, and the display 15A is turned on so that the user can visually recognize it. Therefore, in step S2, it is determined whether or not the PBC reproduction request is made by referring to the stored contents of the memory 18. P in step S2
When it is determined that the BC reproduction is requested, the subroutine of the PBC reproduction processing shown in FIG. 10, which will be described later, is executed as the subroutine processing and ends (step S
3).

When it is determined in step S1 that the disc is not loaded, or when it is determined that the disc is not loaded but the video CD is not loaded, a disc-less display is displayed on the display device 15 and the process ends (step S1).
8). When it is determined in step S2 that PBC reproduction is not requested, reproduction according to the normal track order is started from track # 2 (step S4).
Tr during playback from track # 2 in step S4
It is checked whether the ack / PBC key switch 14C is pressed (step S5), and the Track / PBC key switch 14C is pressed.
When it is determined that the key switch 14C is pressed, step S5 of FIG. 13 described later is executed following step S5 (step S5). Here, the pressing of the Track / PBC key switch 14C in step S5 corresponds to the PBC reproduction restart instruction.

In step S5, Track / PB
If it is not determined that the C key switch 14C is not pressed, it is checked whether the fast-forward instruction key switch 14D or the fast-return instruction key switch 14E is pressed (step S6). When it is determined in step S6 that the fast-forward instruction key switch 14D and the fast-return instruction key switch 14E are not pressed, the disc reproduction is continued (step S7), and when the disc is reproduced to the final position. The reproduction process ends.

When it is determined in step S6 that the fast-forward instruction key switch 14D or the fast-return instruction key switch 14E is pressed, a search process based on the pressed key switch is executed (step S).
9) When step S7 is executed following the end of the execution of the search process and the reproduction is performed up to the final position of the disc, the reproduction process ends. When it is determined in step S6 that the fast-forward instruction key switch 14D is pressed, the search processing by fast-forward is performed, and when it is determined that the fast-return instruction key switch 14E is pressed, the search processing by fast-reverse is performed. To be executed.

Next, based on FIG. 10, step S3 (FIG.
The sub-routine of the PBC reproduction processing in () will be described. FIG. 10 is a flowchart of a subroutine of PBC reproduction processing. When entering the PBC reproduction processing routine, the first list ID number recorded in the list ID offset table, that is, the list ID number is 1
The offset value specified in 〃 (step S11) and recorded in the list ID offset table and recorded in the list number 〃1〃 is referred to (step S12), and the offset value based on the reference result from the beginning of the play sequence descriptor. The second recorded list is read (step S13). It is checked whether the read list is a play list (step S14).

When it is determined in step S14 that the play list is a play list, the play process of the play item designated by the record in the play list (hereinafter, also referred to as play list process) is executed (step S1).
5) From the step S13, the reproduction process is completed. If it is determined in step S14 that the list is not a play list, it is checked whether the list is a selection list (step S16). If it is determined in step S16 that it is a selection list, the reproduction process and the selection list process of the play item designated by the record in the selection list are executed subsequent to step S16 (step S17), and the reproduction is finished. Is executed from step S13.

If it is determined in step S16 that the subroutine is not the selection list, the execution of the subroutine for the PBC process is completed, that is, the execution of step S3 is completed, and the reproduction process shown in FIG. 9 is completed.

Next, the playlist processing and the PBC reproduction temporary interruption processing will be described with reference to FIG. The processing of FIG. 11 shows the content of the playlist processing of step S15 in FIG.

When the play list processing is started, a variable i-indicating the recording position of the play item designation information in the play list is entered.
〃1〃 is set in the offset (step S2
1) The play item to be played back is designated by the play item designation information stored in the first recording position in the playlist, and the designated play item is started to be played (step S22). Then Trac
If the k / PBC key switch 14C is not pressed (step S23), it is checked whether or not the reproduction of the play item being reproduced has been completed, and if it is determined that the reproduction has not been completed, the process is repeated from step S23. The process is executed again (step S24).

When it is determined in step S24 that the reproduction has ended, it is checked whether or not the value of the variable i-offset is the number of all pieces of play item instruction information in the play list (step S25), and the variable i- is set in step S25. When it is determined that the value of offset is not equal to the number of all play item instruction information items in the playlist, the value of the variable i-offset is incremented by 1 following step S25 (step S26), and then executed from step S22. To be done.

In step S25, the variable i-off
When it is determined that the value of set is equal to the number of all pieces of play item instruction information in the playlist, the reproduction of the play item designated by all pieces of play item designation information in the designated playlist is completed in the playlist processing. This means that the offset value of the list to be executed next is fetched from the play list (step S28), and then the process is executed from step S13 in FIG.

In step S23, Track / P
When it is determined that the BC key switch 14C is pressed, normal reproduction is started from the reproduction position when the Track / PBC key switch 14C is pressed (step S27), and the process is executed from step S5 in FIG. It Here, Tra in step S23
The pressing of the ck / PBC key switch 14C corresponds to the interruption instruction of the PBC reproduction, and the normal reproduction is performed in which the reproduction is performed in the track order from the reproduction position when the interruption instruction is issued.

Next, the selection list process and the PBC reproduction temporary interruption process will be described with reference to FIG. The process of FIG. 12 shows the contents of the selection list process of step S17 of FIG.

When the selection list process is started, the reproduction of the play item designated by the play item designation information designated in the selection list is started (step S31). Only one play item is designated by the selection list. Then Tr
It is checked whether or not the ack / PBC key switch 14C is pressed (step S32), and the Track / PB
If the C key switch 14C is not pressed, the press of the numeric key switch 14A is checked (step S33).
When it is determined in step S33 that the numeric key switch 14A is pressed, it is checked whether or not the numeric offset corresponding to the pressed numeric key switch 14A in the selection list is valid in the selection list (step S34).

In step S34, it is determined that the numeral offset is valid when the branch destination list offset corresponding to the numeral of the pressed ten-key switch 14A is stored, and the example based on FIG. In the case of, it is effective only when the numeric keypad switch 14A of the numbers "1", "2" or "3" is pressed. Step S3
When it is determined to be valid in 4, the list offset value in the selection list corresponding to the number of the pressed numeric keypad switch 14A is read as the list offset value for the next reproduction (step S3).
8), execution is performed from step S13 in FIG.

When it is determined in step S33 that the numeric key switch 14A is not pressed, or when it is determined in step S34 that the pressed numeric key switch 14A is not valid, the reproduction of the play item is completed. Whether or not it is checked (step S35), and if not completed, the process is executed from step S32. When it is determined in step S35 that the reproduction of the play item has ended, the offset value to be executed next from the selection list is read as the list offset value for the next reproduction (step S36). ), Step S1 in FIG.
It is executed from 3.

In step S32, Track / PB
When it is determined that the C key switch 14C has been pressed, normal reproduction for reproducing in track order from the current reproduction position is started (step S37), and is executed from step S5 in FIG. Here, the pressing of the Track / PBC key switch 14C in step S32 is P
This corresponds to the instruction to suspend BC reproduction.

Next, the PBC reproduction restart processing will be described with reference to FIG. The process of FIG. 13 is performed by the Track / PBC key switch 14C in step S5 of FIG.
When it is determined that is pressed, the process is executed following step S5 in FIG. 9, and is for shifting from the normal track order reproduction to the PBC reproduction restart.

When the PBC reproduction restart processing is started, processing for obtaining all play items which can be instructed to be reproduced from the current reproduction position is performed (step S41). When the process of step S41 is being performed, the optical pickup is set to the video C.
It is opposed to a position in a predetermined track on D, and if this track is designated as track #n, a play item called track #n is one of play items that can be instructed to be reproduced from the current reproduction position. At the same time, an entry whose start position is the same as that of track #n, for example, entry #N
Then, the entry #N is also one of the play items that can be instructed to be reproduced. Furthermore, if additional entries exist in track #n, additional entries # (N + 1), # (N +
2) If the current position can be instructed to be reproduced by time comparison between the start position of ..., and the current position, a play item may be added.

For example, in the video CD having the recorded contents of the entries VCD area shown in FIG. 4, Tra is played during the normal reproduction in the track order in step S5 of FIG.
A case where the reproduction position when the ch / PBC key switch 14C is pressed is 5 minutes 30 seconds 00 frame will be specifically described. If the current reproduction position is 5 minutes 30:00 frames, the play items obtained in step S41 in FIG. 13 are track # 4 and entry # 5. Entry # 6 is an additional entry of track # 4, but the start time of entry # 6 is 6 minutes 0 seconds 0
Since it is 0 frame, Tr during normal playback in track order
Since it is not possible to instruct the reproduction of the reproduction position of 5 minutes 30 seconds 00 frames when the ach / PBC key switch 14C is pressed, this case is excluded.

In the video CD having the recorded contents of the entries VCD area shown in FIG. 4, for example, when the current reproduction position is 7 minutes 30 seconds 00 frames, track # 4, entry # 5, entry # 6,
Entry # 7 will be obtained as a play item in step S41 in FIG.

After step S41, all the lists recorded in the PSDVCD area are searched and tables are created (step S42). This is PSDVCD
The play items in all the lists recorded in the area are read in the order of the list ID numbers, and it is searched whether or not there is a match with one of the one or more play items obtained in step S41. If there is a match, the table is set as an i-offset value with the offset value of the list and the number of the play item designating information in the play list that corresponds to the play item if the list is a play list. Memory 1
Store in 8.

The process of step 42 will be described by taking the case of a video CD having the stored contents of the entries VCD area shown in FIG. 14 and the stored contents of the play sequence descriptor data (PSD) VCD area shown in FIG. 15 as an example. The video CD having the contents of FIGS. 14 and 15 has images such as a movie, and as shown in the schematic diagram of FIG. 14 showing an example of the recorded contents of the VCD area, the track # 2 is a movie. It is assumed that the origin of the transfer is recorded. Similarly, it is assumed that the track # 3 has a recorded portion, the track # 4 has a recorded portion, and the track # 5 and the track # 6 have different ending portions.

PSDVCD required to play a movie interactively using these image data
An example of the recorded contents of the area is as shown in FIG.
This PSDVCD area has 3 playlists and 1
There is one selection list and one end list. The end list stops the playback as soon as the execution of this list is performed, and is synonymous with stop.

When the above-mentioned video CD is played back by PBC, the offset value of the list ID number "1" is first obtained from the list ID offset table. The recording start position of the playlist 1 is known from this offset value, and the playlist 1 is read. Then, since the total number of play items is "2" and the play items are the tracks # 2 and # 3, the tracks # 2 and # 3 are reproduced, and the list indicated by the value of the list offset A is read. Be done. In this example, the list indicated by the value of the list offset A is the selection list 1.

When the process of the selection list 1 is started, the track # 4 is reproduced as a play item. Since the number of branches is recorded as 2 in this selection list,
When the numeric key switch 14A presses the key switch of the number "1" while playing track # 4, the list indicated by the value of the list offset B is displayed. When the key switch of the number "2" is pressed, the value of the list offset C is displayed. If the ten-key switch 14A is not pressed, the list is branched to the list indicated by the value of the list offset D. In this example, the list indicated by the value of the list offset B is playlist 2, the list indicated by the value of the list offset C is playlist 3, and the list indicated by the value of the list offset D is playlist 2.

In the above, since the list indicated by the value of the list offset D is the playlist 2, even if the ten-key switch 14A is not pressed, the same ending image as when the key switch of the number "1" is pressed is displayed. Will be played. Also, at the end of the video on track # 4, for example, "Which do you like, mountain or sea? For mountains, press the number key switch for" 1 "and for sea, press the number key switch for" 2. " The voice data etc. are recorded, and the user responds to them by operating the number key switch of 〃1〃 or the number key switch of 〃2〃.

Each of the play list 2 and the play list 3 has one play item, and the image of the mountain on the track # 5 and the image of the sea on the track # 6 are reproduced. With the end of playback, the list offset E,
Although the list offset F is stored, it is assumed that both indicate the end list. Therefore, the reproduction of the video CD is ended by the end of the reproduction of the track # 5 or the end of the reproduction of the track # 6.

In the case of the video CD as described above, for example, the key switch of the number "1" is pressed in the selection list 1 to reproduce the mountain image, and in the middle of this reproduction, that is, the PBC reproduction of the track # 5. Medium, for example 3
Track / during playback of 0 minutes 10 seconds 00 frames
After pressing the PBC key switch 14C to switch to normal track-order reproduction, the fast-reverse instruction key switch 14 is pressed.
An example will be described in which E is operated to return to 25 minutes 00 seconds 00 frames and the Track / PBC key switch 14C is pressed again.

At this time, step S41 is executed in the flowchart of FIG. In step S41, since the current playback position is 25 minutes, 0 seconds, 00 frames, the contents of the entries VCD area (FIG. 14) are referred to, and track # 4 and entry # 3 are set as play items.
Is required to be able to instruct playback at the current playback position. Subsequently, in step S42, it is searched from the top list of the PSDVCD area whether or not there is play item designation information for designating the play items of track # 4 and entry # 3, and if there is, a table is created in the memory 18. In this case, since the track # 4 exists in the selection list 1 having the list ID number "2" (see FIG. 15),
The table shown in FIG. 16 is created. In this case, since there is only one location in the entire list, the content of the table is one, but if there are multiple locations, the content of the table will of course be multiple.

Here, Tra is being reproduced during PBC reproduction of track # 5, for example during reproduction of 30 minutes, 10 seconds, and 00 frames.
After pressing the ck / PBC key switch 14C to make a transition to the normal track order reproduction, operate the fast-return instruction key switch 14E to return to 25 minutes 00 seconds 00 frames, and again press the Track / PBC key switch 14C. When the button is pressed, interruption is instructed during the interactive reproduction, normal reproduction is performed from the reproduction position at the time of the interruption instruction, and fast rewind instruction is issued in this normal reproduction.
Corresponding to an instruction to restart the reproduction in the interactive mode when the normal reproduction is performed up to the minute 00 second 00 frame.

Further, when the table shown in FIG. 16 is created, when the reproduction restart instruction is issued, the restart position which includes the reproduction position at the time of the reproduction restart instruction and which can be instructed to be reproduced interactively from the reproduction position is substantially set. It corresponds to the fact that all of the restart information shown in the figure are searched based on the playback information recorded on the optical disk for interactive playback, and all the searched restart information is stored in the memory.

The table created in step S42 is a list table that enables PBC reproduction, and stores two data for one resumable position. One is the offset value of the list, and the other is the i-offset value stored as the position (order) of the playitem designation information in the case of the playlist. In case of selection list, play item is 1
Since only one is allowed, the i-offset value = 1 is stored. These processes are executed in step S42.

In step S42, the list ID number may be stored in the table created in the memory 18 instead of the list offset value. However, when the list ID number is stored, it is recorded in the list ID offset table VCD area. By referring to the list ID offset table, the offset value from the beginning of the play sequence descriptor, that is, the list offset value is obtained. In addition, a valid value may not be stored in the list ID offset table corresponding to the list ID number.

However, by storing the list offset value in the table, the list ID can be used for searching the list.
It is not necessary to refer to the offset table, and it is sufficient to add the list offset value to the start address of the play sequence descriptor, and as a result, the list I
The list will be specified by the list offset value without referring to the D offset table. Also, in the case of a playlist, there may be multiple play items in the playlist, so the variable i-off
The play item is specified by storing the set value.

Subsequent to step S42, the total number of tables is displayed on the display device 15C for displaying the number of PBC reproduction restart places in the display device 15 (step S43). In the above-mentioned example, since the content of the table is one, "1" is displayed on the PBC reproduction restart place number display unit 15C. Subsequent to step S43, the operation waits until the numeric key switch of the numeric keypad switch 14A is pressed (step S44).
When it is determined in step S44 that the numeric key is pressed, it is determined whether the number of the pressed numeric key switch is less than or equal to the total number of tables, that is, whether the table contents instructed by the numeric key switch exists. Is checked (step S45), and if it is determined that the table contents do not exist, the process waits until the numerical key switch of the number for which the table contents exist is pressed.

In step S45, when it is determined that the table contents instructed by the numeric key switch exists, that is, when the numeric key switch "1" is pressed in the above example, the table contents in the table are changed. The list offset value and the i-offset value stored in the location designated by the numeric key switch are read from the table (step S46). Following step S46, the list indicated by the read list offset value is read (step S47). If the read list is a play list, the process is executed from step 23 in FIG. That is, PBC reproduction is restarted from step S23 (step S48).

If it is determined in step S47 that the read list is not a play list, the process is executed from step S32 in FIG. That is, PBC
The reproduction is restarted from step S32 (step S48). In the case of the video CD of the above-described specific example, the resumable reproduction information is limited to the selection list 1, so that the process of FIG.
The PBC reproduction is restarted from step S32 in.

Here, steps S44 to S4
8. Until the subsequent reproduction, one of all the restart information is instructed following the reproduction restart instruction, the restart information corresponding to the instruction is read from the memory, and the interactive operation is performed from the reproduction position at the time of the reproduction restart instruction. Corresponding to making playback.

In the above-mentioned embodiment, Tr
The case where the temporary stop instruction of the PBC reproduction and the instruction of the PBC reproduction restart are given by the ack / PBC key switch 14C has been exemplified, but the key for instructing the temporary stop instruction of the PBC reproduction and the instruction of the PBC reproduction restart independently. You may provide separately as a switch.

[0086]

As described above, according to the optical disc player of the present invention, the reproduction is temporarily suspended during the interactive reproduction, the normal reproduction is executed from the interrupted position, and the intermediate position during the normal reproduction is performed. The effect that can be returned to the interactive playback from is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a video CD player as an embodiment of an optical disc player according to the present invention.

FIG. 2 is a schematic diagram for explaining recorded contents of a video CD.

FIG. 3 is a schematic diagram for explaining the recorded contents of an information VCD area of a video CD.

FIG. 4 is a schematic diagram for explaining the recorded contents of an entry VCD area of a video CD.

FIG. 5: Video CD list ID offset table V
It is a schematic diagram which shows the recording content of a CD area.

FIG. 6 is a schematic diagram for explaining recorded contents of a play sequence descriptor data VCD area of a video CD.

FIG. 7 is a schematic diagram for explaining recorded contents of a playlist.

FIG. 8 is a schematic diagram for explaining the recorded contents of a selection list.

FIG. 9 is a flowchart for explaining a reproduction process of an embodiment of the optical disc player according to the present invention.

FIG. 10 is a flowchart for explaining a PBC reproduction process of an embodiment of the optical disc player according to the present invention.

FIG. 11 is a flowchart for explaining a playlist process and a PBC reproduction temporary interruption process of an embodiment of the optical disc player according to the present invention.

FIG. 12 is a flowchart for explaining selection list processing and PBC reproduction temporary interruption processing of an embodiment of the optical disc player according to the present invention.

FIG. 13 is a flow chart for explaining PBC reproduction restart processing of an embodiment of the optical disc player according to the present invention.

FIG. 14 is a schematic diagram for explaining the recorded contents of an entry diagram VCD area.

FIG. 15 is a schematic diagram for explaining recorded contents of a play sequence descriptor VCD area.

FIG. 16 is a schematic diagram showing an example of creating a list table in which PBC reproduction can be restarted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 recording signal read-out part 2 servo circuit 3 EFM demodulation circuit 4 CD-ROM demodulation circuit 5 demultiplexer 6 MPEG video decoder 7 and 11 D / A converter 8 bus 9 MPEG audio decoder 13 system controller 13A 1st reproduction control circuit 13B 1st 2 playback control circuit 13C search circuit 14 key switch group 14A numeric key switch 14B playback instruction key switch 14C Track / PBC key switch 14D fast-forward instruction key switch 14E fast-return instruction key switch 15 display device 15A to 15C display device 16 and 18 memory

Claims (2)

[Claims] 1. An optical disc player for reproducing an optical disc according to an interactive system, wherein an interruption instruction means for instructing interruption during reproduction by the interactive system and a first reproduction control for performing normal reproduction from a reproduction position at the time of instructing the interruption. Means, a resuming instruction means for instructing resumption of the replay in an interactive manner during the normal replay by the first replay control means, and a resumable operation instructing replay in an interactive manner from the replay position including a replay position at the time of the resumption instruction. Retrieval means for retrieving all the resumption information substantially indicating the position based on the replay information recorded on the optical disc for interactive reproduction, and storing all the resumption information retrieved by the retrieval means A memory, a restart information instruction means for instructing one of all the restart information after the restart instruction, and an instruction by the restart information instruction means. Second replay control means for retrieving replay information from the memory, and replaying in an interactive manner from the replay position at the time of the replay instruction based on the replay information read from the memory. Optical disc player. 2. The optical disk player according to claim 1, wherein the interruption instruction means and the restart instruction means are common instruction means, and the common instruction means is a toggle type to issue a reproduction interruption instruction and a restart instruction for each operation. An optical disk player characterized by performing.