JP2006107705A - Reproduction device, program, reproduction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproduction device capable of realizing smooth angle switching without making a user conscious of a difference of a recording medium on which video streams are recorded. <P>SOLUTION: The reproduction device realizes multi-angle reproduction by selectively reproducing a plurality of video streams recorded on a BD-ROM or a hard disk. When receiving operations of angle selection from a user, the reproduction device reads a video stream in response to the selection operation from either of the BD-ROM and the hard disk. The reproduction device controls an optical pickup of a driver unit corresponding to the BD-ROM so as to point out a video stream recording area of the BD-ROM for a period when the video stream among a plurality of video streams on the hard disk. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of multi-angle playback.

Multi-angle playback is a technique that realizes switching of playback video by selectively reading a plurality of video streams recorded on a recording medium. Here, it is assumed that a plurality of videos obtained by capturing one subject from a plurality of camera angles, such as front, right direction, and left direction, are recorded as a plurality of video streams. On the other hand, if multi-angle playback is executed, the playback video can be switched as if the camera angle is switched from the front to the right and from the right to the left. There is a prior art described in the following patent document regarding a data structure that supports random access on a stream.
JP 2000-228656 A

By the way, the conventional angle switching is based on the premise that a plurality of switchable video streams are recorded on a single recording medium called an optical disk. There is a desire to develop this and realize free angle switching between the video stream on the optical disc and the video stream on the hard disk.
However, if an attempt is made to switch the angle between a plurality of recording media, among the drive devices that access each of the recording media, while one drive device reads a video stream, the other drive device enters an idle state. Here, when the optical disk drive device is in an idle state, it takes time to resume reading of the video stream, and the video reproduction is interrupted.

  More specifically, when an optical disk drive device is in an idle state, it retracts the optical pickup to the innermost lead-in area. Thereafter, when the user tries to select a video stream on the optical disc, the optical pickup that has been retracted to the innermost circumference needs to be moved to the recording area of the video stream. This movement requires seek operation of the optical pickup and focus adjustment of the optical pickup, so that it takes time to move the optical pickup to the video stream on the optical disc. Since the data supply to the decoder is interrupted during the movement time, the video reproduction is interrupted.

  In general, a video stream recorded on an optical disc is a main video, and a video stream recorded on a hard disk is often a newly downloaded additional video. In this case, after the additional video on the hard disk is reproduced, it is always necessary to resume the reproduction of the video stream on the optical disk. When the reproduction of the main video is resumed, the interruption of the reproduction video is annoying for the viewing user and unpleasant for the movie dealer who provides the video work. The manufacturer of the playback device purchases unpopularity from both end users and movie makers, and sometimes has a narrow shoulder.

  An object of the present invention is to provide a playback apparatus capable of realizing smooth angle switching without being aware of the difference between recording media on which video streams are placed.

In order to achieve the above object, a playback apparatus according to the present invention is a playback apparatus that realizes stream switching by selectively playing back a plurality of digital streams recorded on a plurality of recording media. A plurality of drive devices for accessing each of the above, a selection means for selecting a stream according to a user operation or a device state, and controlling the drive device to generate a digital stream corresponding to the selection from any of a plurality of recording media A reading means for reading, and a reproducing means for playing back the read digital stream,
One of the plurality of recording media is an optical disk, and the rest is a spare medium used as a spare for the optical disk, and the reading means reproduces a digital stream on the spare medium among the plurality of digital streams. The optical pickup of the drive device corresponding to the optical disc is controlled so that the digital stream recording area in the optical disc is indicated during a certain period.

  While reading from the spare medium is continued, the optical pickup of the drive device is controlled to point to the recording area of the video stream on the optical disc. No interruptions. Smooth multi-angle playback such as “optical disk” and “hard disk” can be realized without making the user aware of the physical difference in the location of the video stream.

  Even when a multi-angle playback is realized by combining a video stream supplied on an optical disc and a video stream downloaded through a network, a smooth multi-angle playback can be realized. It is possible to realize a new supply form in which an additional video stream that is supplied by an optical disk and can be switched by angle switching is supplied by downloading.

  Hereinafter, the internal configuration of the playback apparatus according to the present invention will be described. FIG. 1 is a diagram showing an internal configuration of a playback apparatus according to the present invention. As shown in the figure, the BD-ROM drive 1, the local storage 2, the virtual file system management unit 3, the switch 4, the video decoder 5, the video plane 6, the scenario memory 7, the operation reception unit 8, the PSR set 9, and the control unit 11 Consists of Among these, the Virtual FileSystem management unit 3, the switch 4, the video decoder 5, the video plane 6, the scenario memory 7, the operation reception unit 8, the PSR set 9, the selection unit 10, and the control unit 11 are created as one system LSI. be able to.

<BD-ROM drive 1>
The BD-ROM drive 1 is a BD-ROM drive device, and reads out an AVClip recorded on the BD-ROM part by part and outputs it to the switch 4. Here, the BD-ROM is a recording medium in which a plurality of AVClips and Clip information for the AVClips are recorded in association with each other.
Hereinafter, the BD-ROM will be described. FIG. 2 is a diagram showing an application layer format (application format) of BD-ROM. In this figure, the BD-ROM has a BDMV directory under the Root directory. Under the BDMV directory, there are subdirectories called a PLAYLIST directory, a CLIPINF directory, and a STREAM directory.

<BD-ROM structure 1. AVClip>
In FIG. 2, files with the extension .m2ts (00001.m2ts, 00002.m2ts, 00003.m2ts...) Store AVClips. AVClip is a digital stream obtained by multiplexing a video stream and an audio stream.

<BD-ROM structure # 2. Recording in AVClip>
A description will be given of how each AVClip is divided and recorded on the BD-ROM. An AVClip is divided into a plurality of extents and recorded on a BD-ROM. An extent is one divided part on the BD-ROM recorded in a continuous area on the BD-ROM, and is also called a segment.

AVClip # 1 to AVClip # 3 shown in FIG. 2 are moving images taken from three angles. In this case, AVClip # 1 to # 3 are

AVClip # 1⇒
AVClip # 1.1 / 3, AVClip # 1.2 / 3, AVClip # 1.3 / 3

AVClip # 2⇒
AVClip # 2.1 / 3, AVClip # 2.2 / 3, AVClip # 2.3 / 3

AVClip # 3⇒
AVClip # 3.1 / 3, AVClip # 3.2 / 3, AVClip # 3.3 / 3

It is divided into three extents.

FIG. 3B is a diagram describing extents constituting each AVClip on the AVClip time axis. The three extents constituting each AVClip are located in the same playback time zone. That is, AVClip # 1.1 / 3, AVClip # 2.1 / 3, and AVClip # 3.1 / 3 are located in the same time zone. AVClip # 1.2 / 3, AVClip # 2.2 / 3, and AVClip # 3.2 / 3 are located in the same time zone, and AVClip # 1.3 / 3, AVClip # 2.3 / 3, and AVClip # 3.3 / 3 are located in the same time zone.

Extents that make up three AVClips in a BD-ROM are interleaved. Here, the interleaved recording is a recording method in which, in a divided portion obtained by dividing a plurality of files, those reproduced in the same time zone are recorded together. Since each of the three AVClips is composed of three extents, if these are interleaved, the first one (AVClip # 1.1 / 3, AVClip # 2.1 / 3.AVClip # 3.1 / 3) is recorded in a lump. Similarly, the second one (AVClip # 1.2 / 3, AVClip # 2.2 / 3.AVClip # 3.2 / 3) is recorded together, and the third one (AVClip # 1.3 / 3, AVClip # 2.3 / 3) .AVClip # 3.3 / 3) is recorded in one batch.

Among these, AVClip # 1.1 / 3 to AVClip # 3.1 / 3 are a part of AVClip to be reproduced in the same time zone. In this way, extents to be reproduced in the same time zone are collected and continuous. FIG. 3A shows an allocation image showing how three AVClips constituting a multi-angle section are arranged on a BD-ROM.
By such interleaved recording, it is possible to suitably perform switching of a read destination file such that another file is read in the middle of reading a certain file. An AVClip recording area in which a plurality of AVClips are interleaved is referred to as an interleave area. A section in which a plurality of AVClips can be freely switched by interleave recording is called a “multi-angle section”. An area in which an AVClip is recorded without performing interleave recording is called a non-multi-angle section. In the subsequent area of the multi-angle section, an AVClip constituting the non-multi-angle section is recorded, and the AVClip constituting the multi-angle section is reproduced continuously with the AVClip constituting the non-multi-angle section. This completes the description of AVClip interleaved recording. Hereinafter, the video obtained by AVClip # 1 on BD-ROM is called “Angle A”, and the video obtained by AVClip # 2 on BD-ROM is obtained by “Angle B”, AVClip # 3 on BD-ROM. The resulting image is called “Angle C”.

<BD-ROM configuration # 3: Clip information>
Files with the extension “clpi” (00001.clpi, 00002.clpi, 00003.clpi...) Are management information corresponding to each AVClip on a one-to-one basis. Because of the management information, the Clip information has information such as a stream encoding format, frame rate, bit rate, and resolution in the AVClip, and an EP_map that indicates the GOP head position.

FIG. 4 is a diagram illustrating a configuration of EP_map in Clip information. The first level in the figure shows the time axis of each of AVClip # 1 to AVClip # 3, and the second level shows three EP_maps in Clip information # 1 to Clip information # 3. The third level shows a multi-angle section (AV Clip that constitutes an interleave area) in the BD-ROM.
In the third row, the packet number at the head of AVClip # 1.1 / 3 to AVClip # 3.1 / 3, AVClip # 2.1 / 3 to AVClip # 2.3 / 3, AVClip # 3.1 / 3 to AVClip # 3.3 / 3 is SPN = N1 to n9, and in the first row, the beginning of AVClip # 1.1 / 3 to AVClip # 3.1 / 3, AVClip # 1.2 / 3 to AVClip # 3.2 / 3, AVClip # 1.3 / 3 to AVClip # 3.3 / 3 Assuming that the playback time is t1, t2, t3, the EP_map of Clip information # 1 is t1, t2, t3 on the time axis of AVClip # 1, with the first SPN of AVClip # 1.1 / 3 to AVClip # 1.3 / 3 It is shown in correspondence with SPN = n1, n4, n7. Similarly, EP_map of Clip information # 2 sets t1, t2, and t3 on the time axis of AVClip # 2 to SPN = n2, n5, and n8, which are the first SPNs of AVClip # 2.1 / 3 to AVClip # 2.3 / 3. The EP_map of Clip information # 3 indicates t1, t2, and t3 on the time axis of AVClip # 3 as the first SPN of AVClip # 3.1 / 3 to AVClip # 3.3 / 3, SPN = n3, n6, Shown in correspondence with n9.

  Thus, since the SPN at the head of the extent is associated with the playback time point on the time axis in the EP_map of the Clip information, the corresponding SPN can be derived from the playback time point of each AVClip. Although illustration is omitted because it becomes complicated, one or more GOPs exist in the extent, and the SPN of the GOP head picture data existing in the extent is the PTS of the GOP head picture data. It is shown in EP_map in a state associated with. Since the GOP exists every 0.4 to 1.0 seconds, it can be seen that the EP_map indicates the SPN of picture data every 0.4 to 1.0 seconds in association with the PTS. By using such EP_map, it is possible to access an arbitrary position on the AVClip constituting the multi-angle section.

Note that description of files with the extension “mpls” (00001.mpls, 00002.mpls, 00003.mpls...) Is omitted.

<Local storage 2>
The local storage 2 is a spare recording medium (spare medium) used as a spare for the BD-ROM, and is used as a tray for content delivered from the movie distributor's server. The local storage 2 in the present embodiment is a hard disk built in the playback apparatus, and records AVClip, Clip information, and PlayLIst information distributed from the movie distributor's server. In response to a request from the control unit 11, the local storage 2 reads the AVClip recorded on the hard disk part by part and outputs it to the switch 4.

<Configuration of local storage 2 1. Directory configuration>
FIG. 5A is a diagram showing a directory structure in the local storage 2. In the directory structure of the figure, there is a subdirectory “organization # 1” under the ROOT directory, and a subdirectory “disc # 1” under the subdirectory. The directory “organization # 1” is a directory assigned to a specific provider of movie works. “Disc # 1” is a directory assigned to each BD-ROM provided by the provider.

By providing a directory corresponding to each BD-ROM in a directory corresponding to a specific provider, download data for each BD-ROM is individually stored. Under this subdirectory, PlayList information, Clip information, and AVClip are stored in the same manner as stored in the BD-ROM.

<Configuration of local storage 2 2. AVClip>
FIG. 5B is a diagram showing an AVClip on the local storage 2. The AVClip on the hard disk, like the three AVClips on the BD-ROM, is divided into three extents (AVClip # 4.1 / 3, AVClip # 4.2 / 3, AVClip # 4.3 / 3) and recorded on the hard disk. As a result, the AVClip on the hard disk is selectively played back with a plurality of AVClips that are interleaved on the BD-ROM. The video reproduced by the AVClip on the local storage 2 is referred to as “angle D”.

<Configuration of local storage 2 3. Clip information>
The Clip information on the local storage 2 has an EP_map like the Clip information on the BD-ROM. This EP_map indicates the start SPN of the three AVClip division parts (AVClip # 4.1 / 3, AVClip # 4.2 / 3, AVClip # 4.3 / 3) on the BD-ROM in association with the playback time. FIG. 6 is a diagram showing the structure of EP_map in Clip information # 4. The first level in the figure shows four time axes of each of AVClip # 1 to AVClip # 4, and the second level shows an EP_map in Clip information # 4. The third level shows an AVClip in the local storage 2.

In the third stage, the SPN of AVClip # 4.1 / 3, AVClip # 4.2 / 3, AVClip # 4.3 / 3 is SPN = n10 to n12, and in the first stage, AVClip # 4.1 / 3, AVClip # 4.2 / 3, The first playback time of AVClip # 4.3 / 3 is t1, t2, t3. These t1, t2, and t3 are the same as the playback time of AVClip # 1.1 / 3 to AVClip # 3.1 / 3, AVClip # 1.2 / 3 to AVClip # 3.2 / 3, AVClip # 1.3 / 3 to AVClip # 3.3 / 3 is there. In this case, the EP_map of Clip information # 4 indicates t1, t2, and t3 on the time axis of AVClip # 1 to # 4 in association with SPN = n10, n11, and n12 in the AVClip on the BD-ROM.

<Configuration of local storage 2 4. PlayList information>
The PlayList information on the hard disk is PlayList information corresponding to a multi-angle section, and is configured so that a plurality of AVClips on the BD-ROM and an AVClip on the hard disk can be selectively played back. FIG. 7 shows the data structure of PlayList information on the hard disk. As shown in the figure, the Play Item information corresponding to the multi-angle section includes a compatible part with a normal Play Item and an extended part for realizing the multi-angle section. The data structure of the compatible part is “Clip_information_file_name”, “Clip_codec_identifier”, “IN_time”, and “OUT_time”. In the multi-angle section, the AVClip designated by this compatible part is handled as the first angle section. By doing this, even if a playback device that cannot support multi-angle sections (a playback device that can only support the data structure of BD-RE) reads a Play Item that supports multi-angle sections, only this compatible part is read. By referring to the playback, the first angle section can be played back. The data structure of the extension part consists of “is_multi_angles”, “number_of_angles”, “is_seamless_angle_change”, and “Angle information [2] [3]... [J]”.

“Is_multi_angles” indicates whether the playback section corresponding to this PlayItem is a multi-angle section or a non-angle section.
“Number_of_angles” indicates the number of angles constituting the multi-angle section when “is_multi_angles” is set to indicate the multi-angle section.
“Is_seamless_angle_change” indicates whether seamless angle switching is intended. Whether or not seamless angle switching is intended depends on whether or not the AVClip is interleaved. Therefore, “is_seamless_angle_change” is set to ON when recorded by interleave recording, and “is_seamless_angle_change” is set to OFF when not recorded.

“Angle information [2]... [J]” is information about each angle section in the multi-angle section, and includes “Clip_Information_file_name [angle_id]” and “Clip_codec_identifier [angle_id]”.
In “Clip_Information_file_name [angle_id]”, the file name of the AVClip that forms the angle section is described.

“Clip_codec_identifier [angle_id]” indicates an encoding method for an AVClip having a file name described in Clip_Information_file_name of angle information.
In the above description, the angle information does not include In_time and Out_time. This is because, in the second and subsequent angle sections, the start point and end point of the Play Item are designated by In_time and Out_time existing in the compatible part. Therefore, the AVClip specified by Clip_Information_file_name in the angle information must have the same playback time as the AVClip specified by Clip_Information_file_name in the compatible part. In addition, on the AVClip playback time axis, time stamp (System Time Clock) values that define individual playback timings must be exactly the same.

Since the compatible part and the extended part of PlayItem information have Clip_Information_file_name, it is possible to collectively specify playback sections for a plurality of AVClips.
<Configuration of local storage 2 5. Specification for multi-angle section>
FIG. 8A is a diagram showing batch designation made by four Clip_Information_file_names of PlayItem information. In the figure, the first to fourth stages show four AVClip time axes (AVClip # 1, # 2, # 3, and # 4 time axes), and the fifth stage has PlayList information. Shows the time axis (PL time axis). These four AVVLip time axes are specified by four Clip_Information_file_names included in PlayItem information. By doing so, four playback sections that can be alternatively played back are defined by the In_time and Out_time of the PlayItem. As a result, a section consisting of a plurality of switchable video images is defined on the PL time axis. The four playback sections on the four AVClips specified by In_time and Out_time are located in the same playback time zone on the PlayList time axis.

FIG. 8B is a diagram describing extents constituting each AVClip on the AVClip time axis. The three extents constituting each AVClip are located in the same playback time zone. That is, AVClip # 1.1 / 3, AVClip # 2.1 / 3, AVClip # 3.1 / 3, and AVClip # 4.1 / 3 are located in the same time zone. AVClip # 1.2 / 3, AVClip # 2.2 / 3, AVClip # 3.2 / 3, AVClip # 4.2 / 3, AVClip # 1.3 / 3, AVClip # 2.3 / 3, AVClip # 3.3 / 3, AVClip # 4.3 / 3 is located in the same time zone.

<Virtual FileSystem management part 3>
The Virtual FileSystem management unit 3 constructs a virtual file system. The virtual file system is a file system in which the file system in the BD-ROM is expanded by adding new file information to the BD-ROM file system. The file information added here is file management information about PlayList information existing in the local storage 2, file management information about Clip information, and file management information about AVClip. The Virtual FileSystem management unit 3 Information indicating the virtual file system to which the file management information is added is created and delivered to the control unit 11. Accordingly, the control unit 11 can recognize that the PlayList information, Clip information, and AVClip on the local storage 2 exist on the BD-ROM.

  FIG. 9 is a diagram illustrating an example of virtual file system construction by the Virtual FileSystem management unit 3. The upper left of the figure shows the directory-file structure in the BD-ROM, which is the same as that shown in FIG. The lower left of the figure shows a directory-file structure in the local storage 2, which is the same as that shown in FIG. The file management information about PlayList information, Clip information, and AVClip on the local storage 2 is added to the volume management information of the BD-ROM.

In particular,
i) Add file management information about PlayList (00002.mpls) on the local storage 2 to the directory management information of the mpls directory in the BD volume configuration information,
ii) Add file management information about Clip information # 4 (00004.clpi) on the local storage 2 to the directory management information of the clpi directory in the BD volume configuration information,
iii) The file management information for AVClip # 4 (00004.m2ts) on the local storage 2 is added to the directory management information of the STREAM directory in the BD volume configuration information.

By doing so, a virtual file system is obtained. The volume management information obtained by this addition is virtual file system information.
This completes the description of the local storage 2. Next, the remaining components (switch 4 to operation receiving unit 8) will be described.

<Switch 4 to operation reception unit 8>
The switch 4 supplies either the AVClip read from the BD-ROM drive 1 or the AVClip read from the local storage 2 to the video decoder 5.

The video decoder 5 decodes the AVClip read from the BD-ROM drive 1 or the local storage 2 and writes uncompressed picture data to the video plane 6. The picture data written on the video plane 6 is converted into a video signal and used for reproduction.
The scenario memory 7 is a memory for storing Clip information and PlayList information.
The operation reception unit 8 receives a signal indicating the user operation from the remote control when the user operation is performed on the remote control. The above is the description of the switch 4 to the operation receiving unit 8.

<PSR set 9>
The PSR set 9 is a non-volatile register built in the playback device, and includes 64 Player Status Registers (PSR) and 4096 General Purpose Registers (GPR). Of the setting values (PSR) of the Player Status Register, PSR4 to PSR8 are used to represent the current playback point.

<Details of PSR set # 1. PSR indicating the current playback point>
PSR (4) is set to a value between 1 and 100 to indicate the title to which the current playback point belongs.

PSR (5) indicates a chapter number to which the current playback point belongs by being set to a value of 1 to 999, and indicates that the chapter number is invalid in the playback device by being set to 0xFFFF.
PSR (6) is set to a value between 0 and 999 to indicate the number of the PL (current PL) to which the current playback point belongs.

PSR (7) is set to a value between 0 and 255, and indicates the number of the PlayItem (current PlayItem) to which the current playback point belongs.
PSR (8) is set to a value from 0 to OxFFFFFFFF, and indicates the current playback time point (current PTM (Presentation TiMe)) with a time accuracy of 45 KHz. With the above PSR4 to PSR8, it is possible to specify where the current playback time point is on the PL time axis or the AVClip time axis.

<Details of PSR set 9. PSR showing angle selection>
PSR (3) in the PSR set 9 indicates the designation of the angle section. PSR (3) has a role of storing a numerical value indicating the current angle. The control unit 11 performs processing for selecting and reproducing the angle section according to the set value of the PSR (3).

FIG. 10 is a diagram illustrating a relationship between a plurality of values that can be taken by the setting value of PSR (3), PlayItem, and Clip information. The left side of the figure shows a plurality of values (1 to 4) that PSR (3) can take.
When the setting value of PSR (3) is 1, Clip_information_file_name in the compatible part is referred to in PlayItem information, and Clip information of the file name 00001.clpi described in Clip_information_file_name is read out to the memory. Then, EP_map in this Clip information is referred to, and AVClip (00001.m2ts) is played back.

When the setting value of PSR (3) is 2, Clip_information_file_name in Angle information [2] is referred to in PlayItem information, and Clip information of file name 00002clpi described in Clip_information_file_name is read out to the memory become. Then, the EP_map in the Clip information is referred to, and AVClip (00002.m2ts) is played back.
When the setting value of PSR (3) is 3, the Clip_information_file_name in the Angle information [3] is referred to in the PlayItem information, and the Clip information of the file name 0003.clpi described in the Clip_information_file_name is read to the memory become. Then, the EP_map in the Clip information is referred to, and AVClip (00003.m2ts) is played back.

When the setting value of PSR (3) is 4, the Clip_information_file_name in the Angle information [4] is referred to in the PlayItem information, and the clip information of the file name 0004.clpi described in the Clip_information_file_name is read to the memory become. Then, EP_map in the Clip information is referred to, and AVClip (00004.m2ts) is played back.
The above is the description of the PSR set 9.

<Selection unit 10>
The selection unit 10 selects one of a plurality of AVClips described in the multi-angle compatible PlayItem information, and causes the control unit 11 to reproduce the selected one. Selection by the selection unit 10 means that when a change in state occurs in the playback apparatus or when an operation for switching the angle number is performed by the user, a predetermined procedure defined in the BD-ROM standard is executed, Write a new angle number to PSR (3), and control the one corresponding to the angle number stored in PSR (3) among the multiple AVClips specified by multiple Clip_information_file_name in the multi-angle compatible PlayItem information It means that the unit 11 reproduces.

Here, the state change in the playback device is switching from one PlayItem information to another PlayItem information, and can be easily detected by observing the PSR (7) described above.
The predetermined procedure is to determine whether an AVClip corresponding to the setting value of PSR (3) or the angle number ordered to be selected by the user exists in the current PlayItem when PlayItem switching occurs. The setting value of PSR (3) is updated or the setting value is maintained according to the determination result. When an AVClip corresponding to the set value of PSR (3) does not exist in the current PlayItem, a process of writing an alternative value to PSR (3) is performed. When the AVClip corresponding to the angle number ordered to be selected by the user does not exist in the current PlayItem, a process for maintaining the current PSR (3) value is performed.

When switching PlayItem information, the above procedure is executed because the number of AVClips that can be switched in a multi-angle section and whether or not it is a multi-angle section differ for each PlayItem information. This is because although it is possible to reproduce in one PlayItem information, it is often impossible to reproduce in another PlayItem information.
When a user operation, the above procedure is executed because the angle number stored in the PSR (3) is not always correct by the user operation, and recovery when an incorrect angle number is about to be written. Because it becomes necessary.
<Control unit 11>
The control unit 11 performs playback control of the AVClip recorded in the BD-ROM drive 1 or the local storage 2. The reproduction control by the control unit 11 refers to the clip information and the PlayList information, and reads the AVClip recorded on the BD-ROM or the hard disk from the BD-ROM drive 1 or the local storage 2 and supplies it to the switch 4 It is done by doing.

  Here, the playback control of the AVClip is performed according to the following procedure. First, an AVClip file on the BD-ROM or hard disk is opened, and the current PTM indicated in PSR (8) is converted into the number of sectors. This number of sectors indicates the number of relative sectors from the beginning of the AVClip file to the position corresponding to the current PTM. Then, the relative sector number is set in the file pointer, and the AVClip is read from the portion indicated by the file pointer.

  In this reproduction control, if a signal indicating an angle switching operation is received from the remote controller, multi-angle reproduction is executed. Multi-angle playback is a control in which “escape” from the currently read AVClip and “entry” to another AVClip are combined. “Escape” from an AVClip refers to controlling the pickup so that it exits the recording area of the AVClip when the pickup is reading a TS packet that constitutes the AVClip.

The “entry” of the AVClip means that the pickup is moved to the recording position of the TS packet constituting another AVClip after the above-mentioned “escape”. By realizing the “escape” and “entry” processes described above in response to user operations, it is possible to dynamically switch the playback video during playback of the AVClip.
In interleave recording, the AVClip is divided using the positions corresponding to the entry and exit points as division boundaries. Therefore, the start position of the divided portion becomes an entry point, and the end position becomes an exit point. Since the divided portions starting at the entry point and ending at the exit point are alternately arranged, escape from one AVClip and entry into another AVClip are preferably performed. The above-described optimization of “escape” and “entrance” makes it possible to realize seamless angle switching without interrupting the reproduced video.

<Details of Control Unit 1 1. Playback from BD-ROM>
FIG. 11A is a diagram schematically illustrating reading from the BD-ROM when AVClip # 1 is selected from the four angle videos. In this figure, among the three AVClip extents recorded in interleave, only those constituting AVClip # 1 (AVClip # 1.1 / 3, AVClip # 1.2 / 3, AVClip # 1.3 / 3) are sequentially read out. become.

FIG. 11B is a diagram schematically illustrating reading from the BD-ROM when AVClip # 2 is selected from the four angle videos. In this figure, among the three AVClip extents recorded in interleave, only those constituting AVClip # 2 (AVClip # 2.1 / 3, AVClip # 2.2 / 3, AVClip # 2.3 / 3) are sequentially read out. become.
FIG. 12A schematically shows a reading operation by the optical pickup when AVClip # 2 is selected during AVClip # 1 playback. What is described as a switching operation in this figure indicates the timing of the switching operation. In this case, it can be seen that an operation intended to switch from angle A to angle B is performed during playback of AVClip # 1.1 / 3. In this case, reading of AVClip # 1.1 / 3 is continued regardless of the switching operation. Then, when all of AVClip # 1.1 / 3 is read out and transferred to the next extent, not the second extent (AVClip # 1.2 / 3) constituting AVClip # 1, but the second one constituting AVClip # 2 Extent (AVClip # 2.2 / 3) is read out. Thereafter, extents (AVClip # 2.2 / 3, AVClip # 2.3 / 3) constituting AVClip # 2 are sequentially read.

<Details of control unit 11 2. Angle selection in BD-ROM>
FIG. 12B schematically shows a reading operation by the optical pickup when AVClip # 3 is selected during AVClip # 1 playback. What is described as a switching operation in this figure indicates the timing of the switching operation. In this case, it can be seen that an operation intended to switch from angle A to angle C is performed during playback of AVClip # 1.1 / 3. In this case, reading of AVClip # 1.1 / 3 is continued regardless of the switching operation. Then, when all AVClip # 1.1 / 3 is read out and transferred to the next extent, not the second extent (AVClip # 1.2 / 3) that constitutes angle A but the second extent that constitutes angle C (AVClip # 3.2 / 3) is read. Thereafter, extents (AVClip # 3.2 / 3, AVClip # 3.3 / 3) constituting the angle C are sequentially read. As described above, since the plurality of AVClips constituting the multi-angle section are recorded in an interleaved manner, even if it takes a long time to move the optical pickup, it is possible to continue the playback of the angle video without interruption. it can. The above is the angle switching in the AVClip on the BD-ROM.

FIG. 13A is a diagram showing a read operation when an angle switch from AVClip # 1 to AVClip # 4 occurs during playback of AVClip # 1.1 / 3. FIG. 13A is based on the premise that a switching operation was performed during the reading of AVClip # 1.1 / 3, as in FIG. 12A. In this case, reading of AVClip # 1.1 / 3 is continued regardless of the switching operation, and when reading of AVClip # 1.1 / 3 is completed, AVClip # 4.2 / 3 and AVClip # 4.3 / 3 on local storage 2 are sequentially read. Go.

FIG. 13B is a diagram showing the operation of the optical pickup during reading of AVClip # 4.2 / 3 and AVClip # 4.3 / 3. FIGS. 14A and 14B are diagrams showing the operation of the optical pickup when reading AVClip is resumed.
When AVClip # 4.2 / 3 is being read, the drive device of the BD-ROM is in an idle state, and the drive device retracts the optical pickup to the lead-in area of the BD-ROM (FIG. 13 (b)). Then, if AVClip # 1 is selected again during playback of AVClip # 4.2 / 3, and the playback is attempted, the optical pickup moved to the lead-in area is returned to the recording area of AVClip # 1.3 / 3. Because it is necessary, playback of the AVClip on the BD-ROM side is interrupted. FIG. 14A shows a series of selections such as angle A → angle D → angle A. FIG. In FIG. 14A, the switching operation from angle A to angle D is performed at the time of reading AVClip # 1.1 / 3, as in FIG. 13A. In addition to this, switching operation from angle D to angle A is performed at the time of reading AVClip # 4.2 / 3. FIG. 14B is a diagram illustrating the movement of the optical pickup that has moved to the lead-in area.

Even if there is no such operation, when the reading of the multi-angle section is completed, the control unit 11 must restart the reproduction of the non-multi-angle section on the BD-ROM side. Even in such restart, it is necessary to move the optical pickup that has moved to the lead-in area to the recording area of the AVClip, and since it takes time to resume reading, data supply to the decoder is interrupted and playback may be interrupted. It is possible.

<Details of control unit 11 3. Tracking of optical pickup>
Therefore, in this embodiment, control is performed so that the optical pickup in the BD-ROM follows the pickup in the local storage 2.

  The tracking control is to access the position corresponding to the playback time point of the AVClip on the local storage 2 in the AVClip on the BD-ROM in a situation where the playback device is playing back the AVClip on the local storage 2. Controls the optical pickup. In this follow-up control, since the optical pickup accesses the position corresponding to the playback point in the recording area of the AVClip on the BD-ROM, the playback target is changed from the AVClip on the local storage 2 to the AVClip on the BD-ROM. Even when switching, it is only necessary to move the optical pickup accessing the BD-ROM interleave area. It is not necessary to move the optical pickup that has moved to the innermost area to the BD-ROM interleave area.

Here, the follow-up control is performed according to the following procedure. First, the current PTM shown in PSR (8) is converted into the number of sectors of the AVClip file in the BD-ROM using EP_map. Then, the file pointer on the BD-ROM side is set to indicate the number of sectors. Thereafter, this file pointer is updated with the update of the PTM indicated in PSR (8).
The file pointer indicating the reading position in the local storage 2 is updated as the PTM is updated. The file pointer indicating the reading position in the BD-ROM is also updated along with the above-described PTM update. As a result, the file pointer in the BD-ROM follows the file pointer in the local storage 2.

  There is a GOP at the beginning of the extents that make up the multi-angle section, and within the extent, and the SPN of the I picture at the beginning of the GOP is indicated in the EP_map in a state associated with the PTS of the I picture at the beginning of the GOP. Therefore, if EP_map is used, random access can be performed to a position corresponding to an arbitrary playback time point in the AVClip on the BD-ROM. By using the EP_map for the AVClip on the BD-ROM, the tracking control is realized by converting the PTM indicating the current playback point in the AVClip on the local storage 2 into the recording position in the AVClip on the BD-ROM.

FIG. 15A is a diagram illustrating the follow-up control by the control unit 11 when the user performs a switching operation from the angle A to the angle D.
In the figure, a broken arrow indicates the follow-up control by the control unit 11. In the second tier, during the period when AVClip # 4.2 / 3 and AVClip # 4.3 / 3 are being read out of AVClip # 4 on the local storage 2, the BD-ROM, as shown by the dashed arrows, Control is performed to indicate AVClip # 1.1 / 3 and AVClip # 1.2 / 3.

  During the period when AVClip # 4.2 / 3 is read from the local storage 2, the optical pickup is controlled to read AVClip # 1.2 / 3, and the period during which AVClip # 4.3 / 3 is read from the local storage 2 Then, the optical pickup is controlled so as to read AVClip # 1.3 / 3. Thereby, even during the period when the AVClip is read from the local storage 2, the position corresponding to the reproduction position of the AVClip on the BD-ROM is indicated by the optical pickup. In FIG. 15A, even when the non-angle section on the BD-ROM side is played after the playback of AVClip # 4.3 / 3 on the local storage 2, the optical pickup is moved to the BD-ROM interleave area by the tracking control. Therefore, non-angle section playback on the BD-ROM side can be performed at high speed. Even if playback of the AVClip on the local storage 2 is completed and switching to the AVClip on the BD-ROM is instructed, the AVClip on the BD-ROM can be supplied to the decoder without interruption.

  FIG. 15B is a diagram showing the setting of the switch 4 at the time of reading in FIG. At the time of reading AVClip # 1.1 / 3, the switch 4 is switched so that the data supply source to the video decoder 5 is on the BD-ROM side. When AVClip # 4.2 / 3 and AVClip # 4.3 / 3 are read, the data supply source to the video decoder 5 is switched to the local storage 2 side. As described above, since the supply source to the video decoder 5 is appropriately switched, the AVClip # 1.2 / 3, AVClip of the BD-ROM is being read during the reading of the AVClip # 4.2 / 3, AVClip # 4.3 / 3 on the local storage 2. Even if tracking control is implemented so as to access # 1.3 / 3, the video of AVClip # 1.2 / 3 and AVClip # 1.3 / 3 will not be played back.

  FIG. 16A is a diagram illustrating movement of the optical pickup when a series of selections such as angle A → angle D → angle A is performed during the follow-up control. Similarly to FIG. 15A, while the AVClip on the local storage 2 is being read, the follow-up control is performed so as to access the AVClip # 1.2 / 3 on the BD-ROM. If the angle is switched from angle D to angle A during playback of AVClip # 4.2 / 3, the optical pickup on the BD-ROM side is accessing AVClip # 1.2 / 3, and so on. AVClip # 1.3 / 3 can be read. By the tracking control, the optical pickup accesses the interleave area of the AVClip on the BD-ROM, so reaccess of the interleave area on the BD-ROM can be realized at high speed.

  FIG. 16B is a diagram showing the setting of the switch 4 at the time of reading in FIG. At the time of reading AVClip # 1.1 / 3 and AVClip # 1.3 / 3, the switch 4 is switched so that the data supply source to the video decoder 5 is on the BD-ROM side. At the time of reading AVClip # 4.2 / 3, the data supply source to the video decoder 5 is switched to the local storage 2 side. As described above, since the supply source to the video decoder 5 is appropriately switched, the follow-up control is performed so as to access the AVClip # 1.2 / 3 of the BD-ROM during the reading of the AVClip # 4.2 / 3 on the local storage 2. Even if it is realized, the video of AVClip # 1.2 / 3 will not be played back.

Hereinafter, implementation of the control unit 11 by software will be described. In order to implement the control unit 11 by software, a program for causing the CPU in the playback apparatus to execute the processing procedure of the flowchart as shown in FIG. 17 may be created.
FIG. 17 is a flowchart showing a playback procedure by the control unit 11. In this flowchart, the PlayItem to be processed is called PlayItem # x. In this flowchart, the current PlayList information (.mpls) is read (step S1), and the first PlayItem of the current PlayList is set to PlayItem # x (PI # x) (step S2).

Then, step S3-step S13 are performed. Here, Steps S3 to S13 constitute a loop process in which the processes of Steps S3 to S13 are repeated for each PI information constituting the current PlayList information until Step S12 becomes Yes.
Steps S3 to S13 that are repeatedly executed in the loop process include the following processes. When playing one PlayItem of the current PlayList information, the setting value of PSR (3) is substituted for the variable V (step S3), and it is determined whether or not the variable V is 2 or more (step S4). ).

If the setting value V of PSR (3) is 2 or more (Yes in step S4), the clip information specified by the Vth angle information [V] .Clip_Information_file_name in PlayItem # x is read out to the memory. Clip information is set as current Clip information (step S5).
If the setting value V of PSR (3) is = 1 (No in step S4), the clip information described in the Clip_information_file_name of the compatible part of the Play Item is read out to the memory, and this Clip information is set as the current Clip information (Step S4). S6).

Thereafter, the In_time of PlayItem # x is converted to an I picture address u using the EPmap of the current Clip information (step S7). Similarly, the Out_time of PlayItem # x is converted into an I picture address v using the EP_map of the current Clip information (step S8). The decoder is instructed to output PlayItem # x from In_time to Out_time (step S9).
The next I picture address of the address v obtained by these conversions is obtained, and the address just before that address is set to the address w (step S10). Using the address w thus calculated, the I picture The BD-ROM drive 1 is instructed to read TS packets from address u to address w (step S11). The termination requirement for this loop processing is that PlayItem # x becomes the last PlayItem of the current PlayList (step S12). If it is not the last PlayItem, the next PlayItem in the current PlayList is set as PlayItem # x. (Step S13).

  FIG. 18 is a flowchart showing the processing procedure of the disk reading process for the multi-angle section. In this figure, the current extent means an extent that is a reading destination by a current address. The current angle means an angle video currently being reproduced in the multi-angle section. Further, the preparation flag in this flowchart is a flag indicating whether or not the angle video should be switched, and 0 is set as an initial value.

  The “current address” is a variable indicating an address to be a reading position in the recording area of the AVClip. The current address may point to a position on the recording area of the AVClip on the BD-ROM, or may point to a position on the recording area in the local storage 2. That is, the “current address” is an abstraction of the address on the BD-ROM recording area and the address on the local storage 2 recording area. “Follow-up address” is a variable that is valid only when the current address indicates a recording area on the local storage 2, and indicates a part corresponding to the current address in the recording area on the BD-ROM. The follow-up control is realized by updating the “follow-up address”.

Steps S21 to S25 are the main loop in this flowchart. This loop process repeats the process of updating the current address to the next address (Step S23) after determining whether or not Steps S21 to S22 are Yes.
Further, it is determined whether or not the current address points to the recording area of the AVClip in the local storage 2 (step S24). If so, a process of updating the follow-up address is performed (step S25).

By repeating these steps S20 to S25, the current address indicating the read destination is sequentially updated within one extent.
The current address is updated each time the main loop consisting of steps S21 to S23 makes a round. On the other hand, the follow-up address is updated when it is determined that the current address is an AVClip recording area in the local storage (Yes in step S24). In other words, if the recording area of the BD-ROM is the current address, only the current address is updated every time the main loop makes a round, and if the recording area of the AVClip in the local storage is the current address, every time the main loop makes a round Both the current address and the follow-up address are updated.

Step S21 is a determination of whether or not the angle has been switched. Here, the angle is switched by pressing an angle key provided on the remote controller or a numerical button. If so, the numerical value indicating the angle to be switched to is substituted into the variable V (step S26), and the preparation flag is set to "= 1" (step S27).
If the angle is switched by pressing the angle key, the value obtained by adding “1” to the value of PSR (3) is substituted into the variable v. When the angle is switched by pressing the numerical button, the value corresponding to the pressed numerical key is assigned to the variable v.

Step S22 is a determination of whether or not the current address is the end address of the current extent. If all the TS packets constituting one extent are read and the current address reaches the end of the extent, this step S22 becomes Yes.
If step S22 becomes Yes, the processing of step S28 to step S39 is executed. Step S28 determines whether or not the preparation flag is = 1. If the preparation flag is 0, the next extent of the current AVClip is set as the current extent (step S29), and the start address of the current extent is set. Is set as the current address (step S30). After this setting, it is determined whether or not the current angle is an AVClip on the local storage 2 (step S31). If the current angle is an AVClip on the local storage 2, the start address of the current extent in the AVClip of the BD-ROM is It is set as a follow-up address (step S32). With the above processing, the current address changes to the head address of the next extent. If the current angle is on the local storage 2, the follow-up address is also updated.

After performing the above process, it returns to the loop process which consists of step S21-step S25. As a result, when the preparation flag is 0, the next extent belonging to the current angle is read.
When the preparation flag is 1, switching processing of the AVClip file to be read is executed. This is because, when the current read destination address reaches the end of the current extent, the switching process of the AVClip file as the read destination is executed.

  First, of the extents at the switching destination angle, those to be reproduced in the time zone next to the current extent are set as the extent dst (step S33). Then, after setting the switching destination angle to the current angle, the extent dst is set to the current extent (step S34). After this setting, it is determined whether or not the current angle is an AVClip on the local storage 2 (step S36). If the current angle is an AVClip on the local storage 2, the start address of the current extent in the AVClip of the BD-ROM is It is set as a follow-up address (step S37).

Then, the preparation flag is cleared to 0 (step S38), and the variable V indicating the switching destination angle is set to PSR (3) (step S39). Finally, the process returns to step S21. As a result, the Clip information described in Clip_information_file_name corresponding to the variable V is read, and reproduction based on the Clip information is continued.
As described above, according to the present embodiment, the optical pickup of the BD-ROM drive device is controlled so as to point to the interleave area of the AVClip in the BD-ROM while reading from the hard disk is continued. Even when the above AVClip playback is resumed, the playback video is not interrupted. Smooth multi-angle playback such as “BD-ROM” and “hard disk” can be realized without making the user aware of the physical difference in the location of the AVClip.

(Second Embodiment)
In the first embodiment, the optical pickup of the BD-ROM drive is controlled to follow the progress of the playback time in the local storage 2, but in the second embodiment, such tracking control is not performed, and the position of the interleave area is somewhere. Is shown on the optical pickup. In other words, AVClip # 1.1 / 3, AVClip # 2.1 / 3, AVClip # 3.1 / 3, AVClip # 1.2 / 3, AVClip # 2.2 / 3, AVClip # 3.2 / 3, AVClip # 1.3 / 3, AVClip # constituting the interleave area The optical pickup is controlled so that it points to 2.3 / 3 and AVClip # 3.3 / 3. Even if the AVClip reading on the local storage 2 side is completed and the AVClip reading on the BD-ROM side is resumed by instructing the optical pickup to somewhere on the interleave area, the BD-ROM side AVClip can be read immediately and supplied to the decoder.

Although it has been described based on the above embodiment, it is merely presented as an example of a system that can be expected to have the best effect in the present situation. The present invention can be modified and implemented without departing from the gist thereof. As typical modified embodiments, there are the following (A), (B), (C),...
(Remarks)
The above description does not show all implementation modes of the present invention. The present invention can be implemented also by the form of the implementation act in which the following (A), (B), (C), (D). Each invention according to the claims of the present application is an extended description or a generalized description of the above-described embodiments and their modifications. The degree of expansion or generalization is based on the characteristics of the technical level of the technical field of the present invention at the time of filing.

  (A) In the present embodiment, the spare recording medium, that is, the local storage has been described as a hard disk, but another recording medium may be used as the local storage. Specifically, it may be a semiconductor memory card such as an SD memory card, a compact flash (registered trademark) card, a smart media, a memory stick, a multimedia card, or a PCM-CIA card. In addition, removable hard disk drives such as ORB, Jaz, SparQ, SyJet, EZFley, and microdrive that can be detached from the playback device and carried around may be local storage.

In all the embodiments, the optical disk according to the present invention is implemented as a BD-ROM. However, any recording medium may be used as long as the access speed is low. For example, it may be an optical disk such as DVD-ROM, DVD-RAM, DVD-RW, DVD-R, DVD + RW, DVD + R, CD-R, CD-RW, or a magneto-optical disk such as PD, MO. .
(B) The digital stream in each embodiment is an AVClip of the BD-ROM standard, but may be a VOB (Video Object) of the DVD-Video standard or the DVD-Video Recording standard. The VOB is a program stream conforming to the ISO / IEC13818-1 standard obtained by multiplexing a video stream and an audio stream. The video stream in AVClip may be in MPEG4 or WMV format. Furthermore, the audio stream may be a Linear-PCM system, a Dolby-AC3 system, an MP3 system, an MPEG-AAC system, or a dts system.

(C) The video stream format in each embodiment may be MPEG4-AVC (also called H.264 or JVT), MPEG2, or VC-1.

(D) Since the flowcharts shown in each embodiment and the information processing by functional components are specifically realized by using hardware resources, it can be said to be the creation of a technical idea using the laws of nature. Satisfies the requirements for establishment as a “program invention”.

-Production form of the program according to the present invention The program according to the present invention can be created as follows. First, a software developer uses a programming language to write a source program that implements each flowchart and functional components. In this description, the software developer describes a source program that embodies each flowchart and functional components using a class structure, a variable, an array variable, and an external function call according to the syntax of the programming language.

  Specifically, the repetitive processing in the flowchart is described using a for statement or the like defined in the above syntax. The determination process is described using an if statement, a swith statement, etc. defined in the above syntax. Hardware control such as playback control for the decoder and access control for the drive device is described by calling an external function supplied from the hardware manufacturer.

The described source program is given to the compiler as a file. The compiler translates these source programs to generate an object program.
Translation by the compiler consists of processes such as syntax analysis, optimization, resource allocation, and code generation. In the syntax analysis, lexical analysis, syntax analysis, and semantic analysis of the source program are performed, and the source program is converted into an intermediate program. In the optimization, operations such as basic block formation, control flow analysis, and data flow analysis are performed on the intermediate program. In the resource allocation, in order to adapt to the instruction set of the target processor, a variable in the intermediate program is allocated to a register or memory of the processor of the target processor. In code generation, each intermediate instruction in the intermediate program is converted into a program code to obtain an object program.

  The generated object program is composed of one or more program codes that cause a computer to execute each step of the flowcharts shown in the embodiments and individual procedures of functional components. Here, there are various kinds of program codes such as a processor native code and JAVA (registered trademark) bytecode. There are various modes for realizing each step by the program code. When each step can be realized by using an external function, a call statement that calls the external function becomes a program code. In addition, a program code that realizes one step may belong to different object programs. In a RISC processor in which instruction types are restricted, each step of the flowchart may be realized by combining arithmetic operation instructions, logical operation instructions, branch instructions, and the like.

When object programs are generated, the programmer activates the linker for them. The linker allocates these object programs and related library programs to a memory space, and combines them into one to generate a load module. The load module generated in this manner is premised on reading by a computer, and causes the computer to execute the processing procedures and the functional component processing procedures shown in each flowchart. Through the above processing, the program according to the present invention can be created.

(E) The program according to the present invention can be used as follows.

(i) Use as an embedded program When the program according to the present invention is used as an embedded program, a load module corresponding to the program is stored in an instruction ROM together with a basic input / output program (BIOS) and various middleware (operation system). Write. By incorporating such an instruction ROM into the control unit and causing the CPU to execute it, the program according to the present invention can be used as a control program for the playback apparatus.

(ii) Use as an application When the playback device is a model with a built-in hard disk, the basic input / output program (BIOS) is built into the instruction ROM, and various middleware (operation system) is preinstalled on the hard disk. Yes. Also, a boot ROM for starting the system from the hard disk is provided in the playback device.

  In this case, only the load module is supplied to the playback device via a portable recording medium or network, and is installed on the hard disk as one application. Then, the playback device performs bootstrap with the boot ROM, starts the operation system, causes the CPU to execute the application as one application, and uses the program according to the present invention.

Since the hard disk model playback apparatus can use the program of the present invention as one application, the program according to the present invention can be transferred, lent or supplied through a network.

(F) The system LSI according to the present invention can be produced and used as follows.

The system LSI is a package in which a bare chip is mounted on a high-density substrate and packaged. A system LSI that includes a plurality of bare chips mounted on a high-density substrate and packaged so that the plurality of bare chips have an external structure like one LSI is also included in the system LSI (such a system LSI is called a multichip module.)
Focusing on the type of package, there are two types of system LSIs: QFP (Quad Flood Array) and PGA (Pin Grid Array). QFP is a system LSI with pins attached to the four sides of the package. The PGA is a system LSI with many pins attached to the entire bottom surface.

  These pins play a role as an input / output interface with a drive device, an input interface with a remote control device, an interface with a television, and an interface with an IEEE1394 interface or a PCI bus. Since pins in the system LSI have such an interface role, the system LSI plays a role as the core of the playback device by connecting a drive device and various circuits of the playback device to these pins in the system LSI. Fulfill.

The bare chip packaged in the system LSI is an instruction ROM, a CPU, a decoder LSI, or the like that implements the function of each component shown as an internal configuration diagram in each embodiment.
As described above in “Use as Embedded Program”, a load module corresponding to a program, a basic input / output program (BIOS), and various middleware (operation system) are written in the instruction ROM. In this embodiment, since the part of the load module corresponding to this program was created in particular, the system LSI according to the present invention can be produced by packaging the instruction ROM storing the load module corresponding to the program as a bare chip. it can.

The details of the production procedure are as follows. First, based on the configuration diagram shown in each embodiment, a circuit diagram of a portion to be a system LSI is created.
Then, if each component is embodied, a bus connecting circuit elements, ICs, LSIs, peripheral circuits thereof, an interface with the outside, and the like are defined. In addition, connection lines, power supply lines, ground lines, clock signal lines, and the like will be defined. In this regulation, the circuit diagram is completed while adjusting the operation timing of each component in consideration of the specifications of the LSI, and making adjustments such as ensuring the necessary bandwidth for each component.

When the circuit diagram is completed, implementation design is performed. Mounting design refers to where on the board the parts (circuit elements, ICs, and LSIs) on the circuit board created by circuit design are placed, or how the connection lines on the circuit board are placed on the board. This is a board layout creation operation for determining whether to perform wiring.
Here, the mounting design includes automatic placement and automatic wiring.
When a CAD apparatus is used, this automatic placement can be realized by using a dedicated algorithm called “centroid method”. In automatic wiring, a connection line that connects pins of components on a circuit diagram is defined using a metal foil or a via. When a CAD apparatus is used, this wiring process can be realized using a dedicated algorithm called “maize method” or “line search method”.

  When mounting design is performed and the layout on the board is determined, the mounting design result is converted into CAM data and output to equipment such as an NC machine tool. NC machine tools perform SoC implementation and SiP implementation based on this CAM data. SoC (System on chip) mounting is a technology that burns multiple circuits on a single chip. SiP (System in Package) mounting is a technology that combines multiple chips into one package with resin or the like. Through the above process, the system LSI according to the present invention can be made based on the internal configuration diagram of the playback apparatus shown in each embodiment.

The integrated circuit generated as described above may be called IC, LSI, super LSI, or ultra LSI depending on the degree of integration.
Furthermore, some or all of the components of each playback device may be configured as one chip. The circuit integration is not limited to the above-described SoC mounting and SiP mounting, and may be realized by a dedicated circuit or a general-purpose process. It is conceivable to use a silicon configurable processor that can reconfigure the connection and setting of circuit cells inside the LSI. Furthermore, if integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative technology, it is naturally also possible to carry out function block integration using this technology. For example, biotechnology can be applied.

(F) EP_map is not necessarily required for the follow-up control on the BD-ROM side. The follow-up control may be realized by analyzing the PTS value of the PES packet constituting the BD-ROM side AVClip and finding the position corresponding to the current playback time on the local storage 2 side.
(G) Although the current read position in the local storage 2 is expressed in PTM, if the bit allocation for the AVClip is a fixed bit rate (CBR), the read position in the local storage 2 may be expressed in the address. Good. In this case, the follow-up control is performed by causing the optical pickup of the BD drive to access the same address. Further, when the bit allocation for the AVClip on the local storage 2 side is proportional to the bit allocation for the AVClip on the BD-ROM side, it may be expressed by an address.

It is a figure which shows the internal structure of the reproducing | regenerating apparatus based on this invention. It is a figure which shows the application layer format (application format) of BD-ROM. (A) An allocation image showing how the three AVClips constituting the multi-angle section are arranged on the BD-ROM.

(B) It is the figure which described the extent which comprises each AVClip on the AVClip time-axis.
It is a figure which shows the structure of EP_map in Clip information. (A) It is a figure which shows the directory structure in the local storage 2. FIG. (B) It is a figure which shows AVClip on the local storage 2. FIG. [Fig. 11] Fig. 11 is a diagram illustrating a configuration of EP_map in Clip information # 4. It is a figure which shows the data structure of PlayList information on a hard disk. (A) It is a figure which shows the collective designation | designated made by four Clip_Information_file_name of PlayItem information.

(B) It is the figure which described the extent which comprises each AVClip on the AVClip time-axis.
FIG. 5 is a diagram illustrating a relationship between a plurality of values that can be taken by a setting value of PSR (3), PlayItem, and Clip information. FIG. 6 is a diagram schematically showing reading from a BD-ROM when AVClip # 1 is selected from four angle videos. (A) It is a figure which shows typically reading from BD-ROM when AVClip # 1 is selected among four angle images | videos.

(B) It is a figure which shows typically reading from BD-ROM when AVClip # 2 is selected among four angle images | videos.
(A) It is a figure which shows typically the reading operation | movement by an optical pick-up when AVClip # 2 is selected during AVClip # 1 reproduction | regeneration.

(B) It is a figure which shows typically the reading operation | movement by an optical pick-up when AVClip # 3 is selected during AVClip # 1 reproduction | regeneration.
(A) It is a figure which shows the read-out operation | movement when the angle switch from AVClip # 1 to AVClip # 4 occurs in the middle of AVClip # 1.1 / 3 reproduction.

(B) It is a figure which shows retraction | saving of the optical pick-up by a drive apparatus.
(A) It is a figure which shows the state which selected AVClip # 1 again and was going to reproduce | regenerate. (B) It is a figure which shows the movement of the optical pick-up which moved to the lead-in area | region. (A) It is a figure which shows the follow-up control by the control part 11 when the user performs switching operation from the angle A to the angle D.

(B) It is a figure which shows the setting of the switch 4 at the time of the reading of Fig.15 (a).
(A) It is a figure which shows the movement of an optical pick-up when a series of selections, such as angle A-> angle D-> angle A, is made at the time of execution of follow-up control. (B) It is a figure which shows the setting of the switch 4 at the time of the reading of Fig.16 (a). 4 is a flowchart showing a PL regeneration procedure by the control unit 11. It is a flowchart which shows the process sequence of the disk read-out process for the multi-angle section.

Explanation of symbols

1 BD-ROM drive
2 Local storage
3 Virtual FileSystem Management Department
4 switch
5 Video decoder
6 Video plane
7 Scenario memory
8 Operation reception part
9 PSR set 10 Selection unit 11 Control unit

Claims (8)

A playback device that realizes stream switching by selectively playing back a plurality of digital streams recorded on a plurality of recording media,
A plurality of drive devices for accessing each of the plurality of recording media;
Selection means for selecting a stream according to a user operation or a device state;
Reading means for controlling the drive device to read out a digital stream corresponding to the selection from any of a plurality of recording media;
Playback means for playing back the read digital stream,
One of the plurality of recording media is an optical disk, and the rest is a spare medium used as a spare for the optical disk,
The reading means includes
A playback device that controls an optical pickup of a drive device corresponding to an optical disc so as to indicate a digital stream recording area on the optical disc during a period in which a digital stream on a spare medium is being played out of the plurality of digital streams.   2. The reproducing apparatus according to claim 1, wherein the position indicated by the optical pickup is a position in a digital stream recording area on the optical disc and corresponds to a reading position of the digital stream on the spare medium. The reading means includes
The reproducing apparatus according to claim 1, wherein the position pointed to by the optical pickup is controlled to follow the reading position of the digital stream on the spare medium. The reading position on the spare recording medium is expressed by time information,
4. The reproducing apparatus according to claim 3, wherein the follow-up control by the reading unit is performed by converting time information indicating a reading position into an address on the optical disc and controlling the optical pickup so as to access the address. The reading position on the spare recording medium is expressed by an address,
4. The reproducing apparatus according to claim 3, wherein the follow-up control by the reading unit is performed by controlling the optical pickup so as to access the same address. A plurality of digital streams recorded on a plurality of recording media are a plurality of video streams constituting a multi-angle video,
The playback apparatus according to claim 1, wherein the stream switching is angle switching. A program for causing a computer to perform stream switching by selectively reproducing a plurality of digital streams recorded on a plurality of recording media,
A selection step of selecting a stream according to a user operation or device status;
A step of reading a digital stream corresponding to the selection from any of the plurality of recording media by controlling a plurality of drive devices that access each of the plurality of recording media;
A step of reading a digital stream corresponding to the selection operation from any of the plurality of recording media by controlling a plurality of drive devices that access each of the plurality of recording media;
A playback step of playing back the read digital stream,
One of the plurality of recording media is an optical disk, and the rest is a spare medium used as a spare for the optical disk,
The reading step includes
The computer controls the optical pickup of the drive device corresponding to the optical disc so that the digital stream recording area in the optical disc is pointed out during the period in which the digital stream on the spare medium is being played out of the plurality of digital streams. Program to do. A reproduction method for switching streams by selectively reproducing a plurality of digital streams recorded on a plurality of recording media,
A selection step of selecting a stream according to a user operation or device status;
A step of reading a digital stream corresponding to the selection from any of the plurality of recording media by controlling a plurality of drive devices that access each of the plurality of recording media;
A playback step of playing back the read digital stream,
One of the plurality of recording media is an optical disk, and the rest is a spare medium used as a spare for the optical disk,
The reading step includes
A reproduction method for controlling an optical pickup of a drive device corresponding to an optical disc so as to indicate a digital stream recording area on the optical disc during a period in which a digital stream on a spare medium is being reproduced among the plurality of digital streams. .

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