KR101464535B1 - Method and apparatus for recording data, method and apparatus for reproducting data, recording medium recorded data - Google Patents

Method and apparatus for recording data, method and apparatus for reproducting data, recording medium recorded data Download PDF

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KR101464535B1
KR101464535B1 KR1020080043317A KR20080043317A KR101464535B1 KR 101464535 B1 KR101464535 B1 KR 101464535B1 KR 1020080043317 A KR1020080043317 A KR 1020080043317A KR 20080043317 A KR20080043317 A KR 20080043317A KR 101464535 B1 KR101464535 B1 KR 101464535B1
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South Korea
Prior art keywords
information
dimensional
video signal
reproducing
video signals
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KR1020080043317A
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Korean (ko)
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KR20090087793A (en
Inventor
장용석
이재준
정길수
김재승
구재필
고정완
김광민
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삼성전자주식회사
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Priority to PCT/KR2009/000720 priority Critical patent/WO2009102173A1/en
Priority to US12/370,775 priority patent/US20090202227A1/en
Publication of KR20090087793A publication Critical patent/KR20090087793A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0238—Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0247—Sharing one wavelength for at least a group of ONUs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/0252—Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

The present invention relates to a method for reproducing a three-dimensional image using data stored in an optical recording medium, and more particularly, to a method for reproducing a three-dimensional image using at least one AV stream and a plurality of associated video signals, Dimensional reproduction unit information from the recording medium on which the three-dimensional reproduction unit information to be used is read, and based on the three-dimensional reproduction unit information, the plurality of associated video signals are three-dimensional image signals for reproducing the three- And selectively reproducing the three-dimensional image using the at least one AV stream and the three-dimensional reproducer information according to the determination result, thereby reproducing the three-dimensional image using the conventional optical recording medium .

Recording medium, DVD, three-dimensional image

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording method and apparatus, a data reproducing method and apparatus, a recording medium,

More particularly, the present invention relates to a method and apparatus for reproducing a three-dimensional image using an AV stream recorded on an optical recording medium, a method for recording data for reproducing a three- A method and an apparatus, and a recording medium on which data is recorded so as to reproduce a three-dimensional image.

Conventional storage media such as floppy disks or hard drives have limited storage capacity or portability. As a result, optical recording media capable of storing high capacity data and satisfying portability have been widely used. As the storage capacity and read speed of the optical recording medium are improved, high-quality video data and high-quality audio data can be stored and reproduced. Particularly, there arises a case where a plurality of related video video data are recorded together on one recording medium in accordance with the tendency of the user. For example, a plurality of associated video data may be recorded on one optical recording medium to implement a multi-angle or PIP (Picture In Picture).

To support the above-described multi-angles, a plurality of video signals photographed by a plurality of cameras are recorded on a recording medium. Taking a soccer game as an example, it is impossible to capture all the situations that occur throughout the soccer field with one camera. In reality, after shooting a game using a plurality of cameras, only a specific camera captures images. However, the user is not always satisfied with the currently provided image, such as when the user wants to continue watching the scene he or she likes, and may want to view an image taken by another camera. In this way, in order to satisfy various tendencies of the user, all the video data photographed by the plurality of cameras is recorded on the optical recording medium, and the user can receive the desired image by selecting the video to be viewed.

Also, in order to provide the PIP, a video signal providing a main video and a video signal providing a sub-video are recorded together on a recording medium. A case where a user wants to view two or more images at the same time or a case where additional information about the main image is to be viewed together with the main image may occur. In this case, the main video and the sub video are simultaneously displayed on one display device by using a plurality of video signals recorded on the recording medium.

Thus, in the conventional optical recording medium, a plurality of related video data can be recorded, and a plurality of related video data can be simultaneously reproduced by the PIP method, or one can be selected and reproduced by the multi-angle method. However, the above-mentioned plurality of related video data is for reproducing a two-dimensional image, and a method for reproducing a three-dimensional image using a plurality of associated video recorded on an optical recording medium is not provided.

According to an aspect of the present invention, there is provided an optical recording medium on which data is recorded so that a three-dimensional image can be reproduced, a method and apparatus for recording data on an optical recording medium to reproduce a three- And to provide a method and apparatus for reproducing a three-dimensional image using the three-dimensional image.

According to an aspect of the present invention, there is provided a method for controlling an AV stream, the method comprising: receiving at least one AV stream providing a plurality of associated video signals; Generating three-dimensional reproduction unit information to be used when the three-dimensional image is reproduced using the plurality of associated image signals; And recording the at least one AV stream and the three-dimensional reproducing unit information on a recording medium.

Wherein the generating of the three-dimensional reproducing unit information comprises generating a plurality of three-dimensional reproducing unit information corresponding to each of the plurality of associated video signals, wherein each of the three- A reproduction mode information indicating whether the signal is a signal for reproducing a 3D image, multiplexing format information indicating a multiplexing method of the corresponding video signal, video depth information indicating whether the corresponding video signal includes depth information, And photographing information of a video signal.

Wherein the photographing information includes at least one of relative position information of a camera that captures the corresponding video signal with reference to the camera that captured the reference video signal, a focal length of the camera that captured the corresponding video signal, And an angle value indicating an angle between the photographed camera and the reference point.

The 3D reconstruction unit information may further include at least one of a maximum distance and a minimum distance between the camera that photographs the corresponding video signal and the object to be photographed when the corresponding video signal includes depth information .

The recording may include displaying the plurality of associated video signals as video signals for providing a multi-angle or recording the video signals for providing a PIP (Picture In Picture) can do.

The recording medium is a Blu-ray disc, and the recording step may record each of the three-dimensional reproducer-side information in playitems related to a corresponding video signal.

The recording medium is a DVD, and the recording step may record each of the three-dimensional reproduced-portion information in C_CAT or VTSI associated with a corresponding video signal.

Another aspect of the present invention is a method for reproducing a three-dimensional image using at least one AV stream providing a plurality of associated video signals and a three-dimensional reproducing unit to be used when reproducing the three- Reading the three-dimensional reproducing unit information; Determining whether the plurality of associated video signals are three-dimensional video signals for reproducing a three-dimensional video, based on the three-dimensional reproducing unit information; And selectively reproducing the three-dimensional image using the at least one AV stream and the three-dimensional reproducing unit information according to the determination result.

A plurality of three-dimensional reproducing unit information corresponding to each of the plurality of associated video signals is recorded on the recording medium, and each of the three-dimensional reproducing unit information includes a signal for reproducing a three- The multiplexing format information indicating a multiplexing scheme of the corresponding video signal, the video depth information indicating whether the corresponding video signal includes depth information, and the corresponding video signal And photographing information.

The reproducing step may include reading the at least one AV stream at a speed twice as fast as the reference speed if the plurality of associated video signals are judged to be a three-dimensional video signal.

The reproducing may concurrently decode the at least one AV stream using a plurality of decoders when it is determined that the plurality of associated video signals are three-dimensional video signals.

The method of claim 1,

Decoding the at least one AV stream; And

And outputting information on a reference video signal among the plurality of video signals and outputting the decoded AV stream to a display device for displaying a three-dimensional image.

According to another aspect of the present invention, there is provided a video decoding apparatus comprising: a receiving unit for receiving at least one AV stream providing a plurality of associated video signals; An information generating unit for generating three-dimensional reproducing unit information to be used when the three-dimensional image is reproduced using the plurality of associated video signals; And a recording unit for recording the at least one AV stream and the three-dimensional reproducing unit information on a recording medium.

Another aspect of the present invention is a method for reproducing a three-dimensional image using at least one AV stream providing a plurality of associated video signals and a three-dimensional reproducing unit to be used when reproducing the three- A reading unit for reading the three-dimensional reproducing unit information and the at least one AV stream; A determining unit for determining whether the plurality of associated video signals are for reproducing a three-dimensional image based on the three-dimensional reproducing unit information; And a reproducing unit for selectively reproducing the three-dimensional image using the at least one AV stream and the three-dimensional reproducing unit information according to the determination result.

In another aspect of the present invention, there is provided a recording medium on which at least one AV stream providing a plurality of video signals is recorded, wherein the 3D playback unit information to be used when the 3D video is reproduced using the plurality of video signals It was recorded further.

It is possible to reproduce a three-dimensional image using a conventional optical recording medium by further recording information of the three-dimensional reproducing section without modifying the data structure of the optical recording medium.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a block diagram of a recording apparatus 100 according to an embodiment of the present invention.

The recording apparatus 100 according to an embodiment of the present invention includes a receiving unit 110, an information generating unit 120, and a recording unit 130.

The receiving unit 110 receives at least one AV stream that provides a plurality of associated video signals. A plurality of associated video signals may be multiplexed in one AV stream, and only one video signal may exist in one AV stream. In addition, the plurality of related video signals may be two-dimensional video signals for multi-angle playback or PIP playback, or may be three-dimensional video signals for playing back three-dimensional video.

The information generation unit 120 generates three-dimensional reproduction unit information. In the present specification, the three-dimensional reproduced-side information refers to information used when a three-dimensional image is reproduced by using a plurality of associated video signals recorded on a recording medium. The information generating unit 120 may generate one piece of 3D rendering unit information to be applied to all of the plurality of related video signals but may also generate a plurality of 3D rendering unit information corresponding to each of the plurality of related video signals have. Hereinafter, it is assumed that the information generating unit 120 has generated a plurality of pieces of three-dimensional reproducing unit information corresponding to each of a plurality of associated video signals.

The three-dimensional reproduction unit information may include at least one of reproduction mode information, multiplexing format information, image depth information, and photographing information.

The reproduction mode information is information indicating whether the corresponding video signal is a three-dimensional video signal which is a signal for reproducing a three-dimensional video. As shown in the following Table 1, when the value of the reproduction mode information is '0', a plurality of related image signals stored in the recording medium are two-dimensional images, and when they are '1', they are three-dimensional images.

[Table 1] Play mode information

value Explanation 0 2D image One 3D image

The multiplex format information indicates a multiplexing method of the video signal corresponding to the three-dimensional reproducer side information. A plurality of video signals may be multiplexed into at least one AV stream. The multiplex format information is used by the playback apparatus to separate video signals when a plurality of video signals are multiplexed into one AV stream. However, even when the video signals are not multiplexed, the 3D playback unit may include the multiplexing format information in a case where the playback apparatus reproduces the video signals.

As shown in the following Table 2, when the value of the multiplexing format information is '00', it means that the video signals are multiplexed in the 'side by side' manner. For example, one frame multiplexed to reproduce a stereo image may be multiplexed so that information on the left view image is included on the left side of the frame, and information on the right view image is included on the right side. When the value of the multiplexing format information is '01', it means that the video signals are multiplexed by the 'top and bottom' scheme. In this case, the frame may be divided so that the information on the left view image is included in the upper part and the information on the right view image is included in the lower part.

When the value of the multiplexing format information is '10', it means that the video signals are multiplexed in the 'frame sequential' manner. In this case, the frame including the information about the left view image and the frame including the information about the right view image alternately can be multiplexed. When the value of the multiplexing format information is '11', it means that the video signals are multiplexed in the 'field sequential' scheme. In this case, the odd-numbered field in the frame may include information on the left view image, and the even-numbered field may include information on the right view image.

[Table 2] Multiplex format information

value Explanation 00 side by side video 01 top and bottom video 10 frame sequential video 11 field sequential image

The video depth information indicates whether the video signal corresponding to the three-dimensional playback unit information includes depth information. Both the right viewpoint image signal and the left viewpoint image signal may be recorded on the recording medium, but according to an embodiment, only one of the right viewpoint (or left viewpoint) image signal may be recorded and a depth image for the recorded image may additionally be recorded have. The image including the depth information of the reference image is referred to as a depth image in this specification.

As shown in the following Table 3, when the value of the image depth information is '0', it means that there is no depth information in the image signal. That is, it means that the video signal corresponding to the three-dimensional playback unit information is not a depth video. If the value of the image depth information is '1', it means that depth information exists in the image signal. That is, it means that the video signal corresponding to the three-dimensional playback unit information is the depth video.

[Table 3] Image depth information

value Explanation 0 No depth image One Depth image

The photographing information indicates information on the image signal corresponding to the three-dimensional reproducer-side information, and may be referred to as a camera parameter. The photographing information may include relative position information, a focal length, and an angle value.

Referring to the following Table 5, the photographing information includes relative position information, focal length, and angle value.

The relative position information indicates the position of the camera used to photograph the video signal corresponding to the three-dimensional reproducing unit information. The relative position information can be represented by using the absolute coordinates of the position of the camera used for photographing the video signal corresponding to the three-dimensional reproducing unit information, or by using the relative position from the position of the reference camera. In the present specification, the relative position information is represented by a 'translation' variable, and indicates the relative position of the camera used for photographing the video signal corresponding to the information of the three-dimensional reproducing unit on the basis of the position of the camera used for photographing the reference image . In the case of a stereo image, the distance from the camera where the reference image is photographed can be displayed. In the case of multi-view, three coordinate values of x, y and z can be used to indicate the relative position.

The focal length is represented by the variable " forcallength " and represents the focal length of the camera used to photograph the video signal corresponding to the information of the three-dimensional playback unit.

The angle value is represented by the 'rotation' variable, and is an angle indicating how much the camera used for photographing the video signal corresponding to the information of the three-dimensional playback unit is turned from the reference point. The angle value may be expressed using an angle relative to the reference camera, or the camera may display the erroneous information based on the reference coordinate system after setting the reference coordinate system.

[Table 4] Shooting information

value Explanation translation [3] Relative position from reference camera ForceLength The focal length of the camera rotation [3] Angle of camera based on world coordinate

The three-dimensional reproduced-side information may further include a photographing information index indicating whether photographing information exists in the three-dimensional reproduced-side information. Referring to Table 5, when the value of the photographing information index is '0', it means that no photographing information exists, and when it is '1', it means that photographing information exists.

[Table 5] Shooting information index

value Explanation 0 No shooting information (No camera parameter information) One Presence of shooting information (presence of camera parameter information)

The three-dimensional reproduced-side information may further include distance information between the camera and the object-to-be-photographed object used for photographing the video signal corresponding to the three-dimensional reproduced-image information. The distance information between the camera and the object exists only when the image depth information is '1', and includes the maximum distance and the minimum distance between the camera and the object. Referring to Table 5, the maximum distance between the camera and the object is expressed by a 'max_depth' variable, and the minimum distance between the camera and the object is expressed by a 'min_depth' variable.

The distance information between the camera and the object may be used as a reference parameter for controlling the reproduction environment such as the case of adjusting the depth between three-dimensional image signals.

[Table 6] Distance information between camera and object

value Explanation max_depth Distance from the camera to the furthest object min_depth Distance from the camera to the nearest object

The recording unit 130 records at least one AV stream and three-dimensional reproducing unit information on the optical recording medium. As the recording medium, an optical recording medium such as a Blu-ray disc, a DVD, or the like can be used.

When a Blu-ray disc is used, the 3D playout unit can record the information in the play item. That is, the three-dimensional playback unit records the information in the play item related to the corresponding video signal. When a DVD is used, the three-dimensional reproducing unit information can be recorded in C_CAT or VTSI. That is, the three-dimensional reproducing unit records the information in the VTSI or C_CAT relating to the corresponding video signal.

In recording at least one AV stream providing a plurality of video signals to the recording medium, the recording unit 130 may display the video signals for providing the multi-angle or the video signals for providing the PIP Can be recorded. This makes it possible to reproduce a three-dimensional image without changing the data structure used in the conventional optical recording medium. The data structure of the Blu-ray Disc and DVD and the recording and reproduction of the three-dimensional video signals will be described later with reference to FIG. 2 and FIG.

FIG. 2A shows a data structure of a Blu-ray Disc for multi-angle reproduction according to an embodiment of the present invention.

The data structure of the Blu-ray Disc is schematically shown as a clip 210, clip information 220, a play item 230 and a play list 240. The clip 210 is a compression-coded AV stream for reproducing audio and video data. The AV stream providing one content may be composed of a plurality of clips or may correspond to one clip.

Clip information 220 includes information about the corresponding clip. For example, the clip information 220 may include encoding attribute information such as the resolution, size, and format information of the corresponding clip, and the physical position of the optical recording medium on which the clip is recorded.

The play item 230 includes time information based on a play time, which is a difference between a start time (In_time) and an end time (Out_time) of a corresponding clip. Specifically, the reproduction start time and reproduction end time in the clip are designated. Therefore, by using the play item 230 and the clip information 220, it is possible to know the position where reproduction should start and the position where reproduction should end.

The play list 240 is composed of one or more play items 230, and is a basic unit of playback. The playback device (not shown) can sequentially play the AV content using the play item 230 included in the play list 240. [

Referring to FIG. 2A, clips 211 and 212 and clip information 221 and 222 are recorded on an optical recording medium for multi-angle reproduction. Further, the play item 231 further includes information on the multi-angle. The information on the multi-angle includes the presence or absence of the multi-angle, the number of the clips for the multi-angle reproduction, and the additional information of the clip for the multi-angle reproduction. The playback apparatus (not shown) searches and reproduces the clips 211 and 212 for multi-angle playback using the play item 231 and the clip information 221 and 222.

A plurality of associated image signals for reproducing a three-dimensional image may be recorded and displayed as image signals for providing multi-angles. That is, the clips 211 and 212 indicated by the images for the multi-angle may be three-dimensional image signals. At this time, the multi-angle information is recorded in the play item, and at the same time, the three-dimensional play section information corresponding to the clip 211 and 212 is recorded in the play item 231. [ The reproduction apparatus to be described later reproduces the three-dimensional image using the multi-angle information and the three-dimensional reproducer information included in the play item 231. [

FIG. 2B shows a data structure of a Blu-ray Disc for PIP reproduction according to an embodiment of the present invention. Hereinafter, the clip 213 for PIP reproduction will be described.

A plurality of video signals are required for PIP reproduction, and a plurality of video signals may be multiplexed into one AV stream or may exist in the form of multiple AV streams without being multiplexed. In FIG. 1B, it is assumed that a main video signal and a sub video signal required for PIP playback are multiplexed and included in a clip 213.

The play list 240 includes a play item 233 and a sub play item 234 for PIP reproduction. The sub playitem 234 is connected to the clip and clip information about the sub-picture and includes play time information based on the play interval between the play start time and the play end time of the sub-picture. It also includes information on whether the sub-image is multiplexed on the main image or whether it exists separately from the main image without being multiplexed.

A plurality of associated video signals for reproducing a three-dimensional image may be recorded and displayed as video signals for providing a PIP. That is, the PIP clip 213 is a three-dimensional image signal. At this time, the PIP information is recorded in the play item 233, and at the same time, the 3D play part information corresponding to the clip 213 for providing the PIP is recorded in the play item 233. That is, a list of Elementary Streams (ES) that provides a three-dimensional image is defined in a play item. The playback apparatus to be described later reproduces the 3D image using the PIP information included in the play item 233 and the 3D reproducer side information.

3A shows a data structure of a DVD for reproducing a three-dimensional image according to an embodiment of the present invention.

Referring to FIG. 3A, a DVD divides a video storage area 312 into a VMG area 321 and a plurality of VTS areas 322. The VMG area 321 stores header information for the entire video title, and a plurality of VTS areas 322 stores titles. In general, the VMG area 321 is composed of 2 to 3 files, and each VTS area 322 is composed of 3 to 12 files.

The VMG 321 area includes a VMGI 331 area for providing additional information for the VMG area 321, a VOBS area 332 for storing video information about a menu, and a VMGI backup area 333 do. Each of these areas exists in one file. Of these, the VOBS area 332 does not necessarily exist and may not exist according to the embodiment.

The VTS area 322 includes VTSI (Video Title Set Information) 334 indicating information on a video title set, VOBS 335 including presentation data for menu screen, VOBS 336 as moving picture information of a video title set, And a VTSI backup area 337 in which VTSI backup data is recorded. Of these, the VOBS 335 including the presentation data for the menu screen does not necessarily exist and may not exist according to the embodiment. Each VOBS 336 is further divided into a VOB and a cell, which are recording units, and one VOB is composed of a plurality of cells. Therefore, the minimum recording unit becomes a cell. In FIG. 3B, the VOB 342-1 having ID # 1 is composed of two cells 341-1 and 341-2.

FIG. 3B shows a title made up of a plurality of PGC (ProGram Chain) connections. Referring to FIG. 3B, after reproducing data through PGC # 2, one of a plurality of PGCs is selected to reproduce the next data. A control signal indicating which of a plurality of PGCs to select is recorded in the DVD. Control of the reproduction order of the data is referred to as navigation, and control signals for determining the reproduction order can be recorded in the PGCI.

3C shows the data structure of the PGC. The PGC is stored in PGCI format. The PGCI consists of Pre-Command, Post-Command, and a plurality of program information in which the navigation control signal is stored. Pre-Command is a command executed before playing data using the PGC, and Post-Command is a command executed after playing back data using the PGC. Each program is composed of a plurality of cell information. The cell information in the program is a reproduction unit, and this cell information is connected in one-to-one relation with the cell as the minimum recording unit in the above-described VOB in FIG. 3B. Referring to FIG. 3C, it can be seen that the cell # 1 351-1 in the program # 1 351 is connected to the first cell 341-1 in the VOB 342-1 whose ID is # 1. A cell as a reproduction unit includes a cell command that is executed when reproduction of data corresponding to the cell is completed.

As described above, the PGCI information hierarchically describes the PGC as the reproduction unit, and connects the cell with the minimum reproduction unit with the cell with the minimum recording unit. The PGC is formed by concatenating a plurality of cells, which are the minimum reproduction units. In particular, a plurality of cells may form a path block.

FIG. 3D shows a case where a plurality of cells as a minimum reproduction unit form a path block. A plurality of cells arranged in parallel within the PGC and configured to reproduce one of the cells is referred to as a path block. The cells constituting the path block may have the same playback time, but may have different playback times.

Such a pass block can be used when a multi-angle is desired to be reproduced. However, when a multi-angle is to be reproduced, cells that are the minimum reproduction units constituting the path block have the same reproduction time, and a plurality of cells included in the path block correspond to the respective angles.

The PGCI includes a reproduction information table that defines reproduction order of cells that are the minimum reproduction units, and C_CAT data that indicates attributes of cells that are the minimum reproduction units. An example of the data structure of C_CAT is as follows.

[Table 7]

beat 0-7 8-15 16-20 21 22 23 24 25 26 27 28,29 31,31 Explanation Cell Command Number Cell Still Time Cell type Access Restriction Flag Cell Play Mode Reserved Seamless Angle Change Flag STC discontinuity Flag Interleaved Batch Flag Seamless Play Flag Cell Block Type Cell Block Mode

A part of the three-dimensional reproduction unit information according to the present invention can be recorded in the reserved field of the C_CAT data structure described in Table 7. [ For example, the 'Cell Block Type' field indicates the type of the cell. If the cell in which the 'Cell Block Type' field is the reproduction unit indicates data for reproducing the multi-angle, the reproduction mode information may be included in the reserved area. When the data is data for reproducing a three-dimensional image, the number and the viewpoint of the multi-angle are recognized as the number and the viewpoint of the video signals used for reproducing the three-dimensional image.

In addition, the remaining information included in the three-dimensional reproducer information may be provided in addition to the C_CAT, or may be provided in the form of a file separate from the C_CAT or included in the VTSI area.

4 shows a block diagram of a recording medium reproducing apparatus according to an embodiment of the present invention.

The reproducing apparatus 400 according to an embodiment of the present invention includes a reading unit 410, a determining unit 420, and a reproducing unit 430.

The reading unit 410 reads the three-dimensional reproducing unit information and the at least one AV stream from the optical recording medium on which the at least one AV stream and the three-dimensional reproducing unit information providing a plurality of associated video signals are recorded. The three-dimensional reproduced-side information is information used when a three-dimensional image is reproduced using a plurality of associated video signals. A plurality of associated video signals may be recorded as indicated by video signals for providing a multi-angle, or may be recorded as video signals for providing a PIP.

The recording medium may have only one 3D reproducer portion information to be applied to a plurality of video signals, but a plurality of 3D reproducer portion information corresponding to each of a plurality of associated video signals may be recorded. Hereinafter, for convenience of description, it is assumed that a plurality of three-dimensional playback unit information corresponding to each of the video signals is recorded on the recording medium. That is, each of the three-dimensional reproducer-side information is used when a three-dimensional image is reproduced by controlling a corresponding video signal.

As the recording medium, an optical recording medium such as a Blu-ray disc or a DVD can be used. When a Blu-ray disc is used, each of the three-dimensional reproduced-side information can be recorded in a playitem relating to a corresponding video signal. Also, in the case where a DVD is used, each of the three-dimensional reproducer-side information can be recorded in C_CAT or VTSI related to the corresponding video signal.

The determination unit 420 determines, based on the three-dimensional playback unit information, whether the plurality of associated video signals are for reproducing a three-dimensional image.

The three-dimensional reproduction unit information may include reproduction mode information indicating whether the corresponding video signal is a signal for reproducing a three-dimensional image. The determination unit 420 may determine whether the corresponding video signal Dimensional image is to be reproduced.

The reproducing unit 430 selectively reproduces the three-dimensional image using at least one AV stream and three-dimensional reproducing unit information according to the determination result of the determining unit 420. That is, if it is not determined that a plurality of related video signals are to reproduce a three-dimensional image, the reproducing unit 430 reproduces the two-dimensional image using at least one AV stream. At this time, the three-dimensional reproduction unit information may not be used. On the other hand, if it is determined that a plurality of related image signals are to reproduce a three-dimensional image, the reproducing unit 430 reproduces the three-dimensional image.

Hereinafter, it is assumed that a plurality of related image signals are determined to reproduce a three-dimensional image.

The three-dimensional reproduced-side information may include multiplexing format information indicating a multiplexing scheme of a corresponding video signal. In this case, the playback unit 430 obtains a plurality of associated video signals by demultiplexing at least one AV stream using the multiplex format information.

Each of the three-dimensional reproduced-side information may include video depth information indicating whether or not it includes depth information of a corresponding video signal. An image signal including depth information is an image called a depth image, and is information for reproducing a reference image as a three-dimensional image. If the video signal corresponding to the three-dimensional reproduced-side information is a depth image, the reproducing unit 430 processes the depth image to obtain information necessary for reproducing the reference image as a three-dimensional image. For example, when the reference image signal is a left view image and the 3D playback unit is a depth image, the playback unit 430 may restore the right view image using the depth image and reproduce the stereo image using the depth image have.

In addition, the three-dimensional additional reproduction information including the image depth information may further include one of a maximum distance and a minimum distance between the camera that captures the corresponding video signal and the object to be photographed. The maximum distance and the minimum distance may be used when the user adjusts the reproduction environment or when the reproducing unit 430 reproduces the three-dimensional image.

The three-dimensional reproduced-side information may include photographing information of a corresponding video signal. The photographing information may include at least one of relative position information of the camera used for photographing the corresponding video signal, focus information of the camera, and angle value of the camera. The reproducing unit 430 can reproduce a higher-quality three-dimensional image using the photographing information.

If it is determined that a plurality of related video signals reproduce a three-dimensional video, two or more video signals should be displayed within a predetermined time. To this end, the playback unit 430 includes a plurality of decoders, and each of the decoders can simultaneously decode the AV stream. For example, assuming that a left view image signal and a right view image signal are provided through two AV streams, one decoder decodes an AV stream providing a left view image while the other decoder decodes a right view image signal And decodes the provided AV stream.

At this time, the reading unit 410 reads the AV stream at a speed two times faster than the speed at which the AV stream is read in the case of reproducing the two-dimensional image, and provides the AV stream to the decoder, or loads one AV stream in advance , It is possible to read and reproduce only the unloaded AV stream at the time of reproduction.

Meanwhile, the reproducing unit 430 may transmit information about the reference video signal together with the decoded video signals to the display unit so that the display unit can smoothly reproduce the three-dimensional video. For example, in the case of a multi-angle, information about an image signal having an angle of '0' is transmitted. In case of a PIP, information about a main image signal is transmitted.

FIG. 5 is a flowchart illustrating an embodiment of the present invention for reading a Blu-ray Disc of FIG. 2 to reproduce a 3D image.

In step s510, it is determined whether the play item includes information for multi-angle playback. If information for multi-angle playback is not included, step s531 is executed to reproduce the two-dimensional video.

In step s520, the three-dimensional reproducing unit information recorded on the Blu-ray disc is read to determine whether a plurality of related video signals, which are indicated for reproducing the multi-angle, are for reproducing a three-dimensional image. Specifically, the 3D-rendering unit determines using the reproduction mode information included in the information. If the plurality of related video signals are for three-dimensional reproduction, the step s532 is performed. Otherwise, the step s531 is performed.

In step s532, the multiplexing format information is obtained. When two or more video signals are multiplexed in one AV stream, demultiplexing is performed using the multiplexing format information.

In step s533, the image depth information and the photographing information index are obtained. The image depth information indicates whether a depth image exists in a plurality of related image signals, and the shooting information index indicates whether shooting information is included in the three-dimensional playback unit information.

In step s534, the number of multi-angles and the viewpoint information are obtained. A plurality of associated image signals for reproducing a three-dimensional image may be recorded and displayed as image signals for providing multi-angles. In this case, the number of the multi-angles corresponds to the number of the video signals used for reproducing the three-dimensional image, and the viewpoint information corresponds to the viewpoint information of the video signals used to reproduce the three-dimensional image.

In step s535, at least one of the distance information and the photographing information between the camera that captured the video signal and the object to be photographed is acquired. When there is a depth image, the information on the maximum distance and the minimum distance between the camera and the object to be photographed of the image signal is included in the three-dimensional reproduced image information. If the shooting information index indicates that the shooting information exists in step s533, the shooting information is included in the three-dimensional playing unit information.

In step s536, the three-dimensional reproduction unit reproduces the three-dimensional image using the information and at least one AV stream recorded on the recording medium.

If a plurality of related video signals to be used for reproducing a three-dimensional image are displayed as video signals for providing a PIP, a three-dimensional image is reproduced by the above-described method. However, the PIP is different in that the PIP defines a list of video signals providing the main video and the sub video in the play item. In this case, in step s534, the number of video signals providing the main video and the sub video is determined as the number of video signals to be used to reproduce the three-dimensional video, and the information about the main video and the sub- Obtain information.

Although a method of reproducing a three-dimensional image using an AV stream recorded on a Blu-ray disc has been described with reference to FIG. 5, a three-dimensional image can also be reproduced using an AV stream recorded on a DVD. In this case, since the 3D reproducer side information is recorded in C_CAT or VTSI, the 3D reproducer side information should be obtained through C_CAT or VTSI in step s520.

6A shows another embodiment of the recording medium reproducing apparatus according to the present invention.

When the disc is loaded in the reproducing apparatus, the reading section 610 reads the AV stream and the three-dimensional reproducing section information recorded on the recording medium.

The buffer 620 is buffered with the data read by the reading unit 610.

The first decoder 631 and the second decoder 632 decode a plurality of associated video signals, respectively.

The switch 640 performs a switching operation depending on whether a plurality of associated video signals are for reproducing a three-dimensional image or for reproducing a two-dimensional image. If a plurality of related video signals are to reproduce a two-dimensional image such as a PIP, control is performed so that the decoded video signals are blended and output. On the other hand, when the associated image signals are for reproducing a three-dimensional image, the image signals are controlled to be output without being blended.

Fig. 6B shows another embodiment of the recording medium reproducing apparatus shown in Fig. 6A.

6B further includes a frame delay 650, as compared to 6A. The frame delay 650 delays the additional video signal for the reference video signal by a predetermined frame and outputs the delayed video signal to the display device. When a three-dimensional image is reproduced, the display device crosses the received multi-view image signals. In this case, the display device should display the image frame related to the additional image signals with a delay. However, if the additional video signal is delayed and output to the display device in advance as shown in FIG. 6B, the display device sequentially displays the received video signals.

7 is a flowchart illustrating a data recording method according to an embodiment of the present invention.

In step s710, at least one AV stream providing a plurality of associated video signals is received.

In step s720, the 3D rendering unit information to be used when the 3D image is reproduced by using a plurality of related image signals is generated. The three-dimensional additional information includes: reproduction mode information indicating whether the corresponding video signal is a signal for reproducing a three-dimensional image; multiplexing format information indicating a multiplexing scheme of the corresponding video signal; And image capturing information of the corresponding video signal.

In addition, the relative position information of the camera, the focal length of the camera that captured the corresponding video signal, and the camera that photographed the corresponding video signal, which correspond to the camera based on the position of the camera that captured the reference video signal, And when the corresponding video signal includes the depth information, the maximum distance and the minimum distance between the camera and the object to be photographed, As shown in FIG.

In step s730, at least one AV stream and three-dimensional reproducing section information are recorded on the optical recording medium.

8 is a flowchart illustrating a method of reproducing data recorded on a recording medium according to an embodiment of the present invention.

In step s810, from the optical recording medium on which the three-dimensional reproducing unit information to be used when reproducing the three-dimensional image using the at least one AV stream and the plurality of associated video signals providing a plurality of associated video signals, And reads the playback supplementary information.

In step s820, based on the three-dimensional reproducing unit information, it is determined whether a plurality of associated video signals are for reproducing a three-dimensional image.

In step s830, the 3D stream is selectively reproduced using the AV stream and the 3D reproducer information according to the determination result.

The playback method illustrated in FIG. 8 may further include reading at least one AV stream at a speed two times faster than a reference speed if the plurality of related video signals are determined to be a three-dimensional video signal. At this time, it is possible to simultaneously decode at least one AV stream using a plurality of decoders.

The above-described embodiments of the present invention can be embodied in a general-purpose digital computer that can be embodied as a program that can be executed by a computer and operates the program using a computer-readable recording medium.

The computer readable recording medium may be a magnetic storage medium such as a ROM, a floppy disk, a hard disk, etc., an optical reading medium such as a CD-ROM or a DVD and a carrier wave such as the Internet Lt; / RTI > transmission).

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

1 shows a block diagram of a recording apparatus 100 according to an embodiment of the present invention.

FIG. 2A shows a data structure of a Blu-ray Disc for multi-angle reproduction according to an embodiment of the present invention.

FIG. 2B shows a data structure of a Blu-ray Disc for PIP reproduction according to an embodiment of the present invention.

3A shows a data structure of a DVD for reproducing a three-dimensional image according to an embodiment of the present invention.

FIG. 3B shows a title made up of a plurality of PGC (ProGram Chain) connections.

3C shows the data structure of the PGC.

FIG. 3D shows a case where a plurality of cells as a minimum reproduction unit form a path block.

4 shows a block diagram of a recording medium reproducing apparatus according to an embodiment of the present invention.

FIG. 5 is a flowchart illustrating an embodiment of the present invention for reading a Blu-ray Disc of FIG. 2 to reproduce a 3D image.

6A shows another embodiment of the recording medium reproducing apparatus according to the present invention.

Fig. 6B shows another embodiment of the recording medium reproducing apparatus shown in Fig. 6A.

7 is a flowchart illustrating a data recording method according to an embodiment of the present invention.

8 is a flowchart illustrating a method of reproducing data recorded on a recording medium according to an embodiment of the present invention.

Claims (28)

Obtaining at least one AV stream providing a plurality of associated video signals; Generating three-dimensional reproduction unit information to be used when the three-dimensional image is reproduced using the plurality of associated image signals; And And recording the at least one AV stream and the three-dimensional reproducing unit information on a recording medium, Wherein the generating of the three-dimensional reproducer-side information comprises generating a plurality of three-dimensional reproducer-side information corresponding to each of the plurality of associated video signals, Wherein each of the three- A reproduction mode information indicating whether the corresponding video signal is a signal for reproducing a three-dimensional image, multiplexing format information indicating a multiplexing mode of the corresponding video signal, an image indicating whether the corresponding video signal includes depth information Depth information, and photographing information of the corresponding video signal. delete 2. The apparatus according to claim 1, The relative position information indicating a relative position of the camera that captures the corresponding video signal, the focal length of the camera that captured the corresponding video signal, and the corresponding video signal, And an angle value indicating an angle between the photographed camera and the reference point. The apparatus according to claim 1, wherein the three- Further comprising at least one of a maximum distance and a minimum distance between a camera that photographs the corresponding video signal and an object to be photographed when the corresponding video signal includes depth information. 2. The method of claim 1, Characterized in that the plurality of associated video signals are recorded in the form of video signals for providing a multi-angle or recorded as video signals for providing PIP (Picture In Picture) Way. The method according to claim 1, The recording medium is a Blu-ray disc, Wherein said recording step records each of said three-dimensional playback unit information in play items related to a corresponding video signal. The method according to claim 1, The recording medium is a DVD, Wherein said recording step records each of said three-dimensional reproduced information pieces in C_CAT or VTSI related to a corresponding video signal. A method for reproducing a three-dimensional image using at least one AV stream providing a plurality of associated video signals and a three-dimensional reproducing unit information to be used when reproducing a three- Reading information; Determining whether the plurality of associated video signals are three-dimensional video signals for reproducing a three-dimensional video, based on the three-dimensional reproducing unit information; And And selectively reproducing the three-dimensional image using the at least one AV stream and the three-dimensional reproducer information according to the determination result, A plurality of three-dimensional reproducing unit information corresponding to each of the plurality of associated video signals is recorded on the recording medium, Wherein each of the three- The reproduction mode information indicating whether the corresponding video signal is a signal for reproducing a three-dimensional image, the multiplexing format information indicating a multiplexing mode of the corresponding video signal, the depth information And the image information of the corresponding video signal. delete 9. The method of claim 8, And reading the at least one AV stream at a rate two times faster than the reference rate if it is determined that the plurality of associated video signals are three-dimensional video signals. 9. The method of claim 8, Wherein when the plurality of associated video signals are determined to be a three-dimensional video signal, the at least one AV stream is simultaneously decoded using a plurality of decoders. 9. The method of claim 8, Decoding the at least one AV stream; And And outputting information about a reference video signal among the plurality of video signals and the at least one decoded AV stream to a display device for displaying a three-dimensional image. A receiver for obtaining at least one AV stream providing a plurality of associated video signals; An information generating unit for generating three-dimensional reproducing unit information to be used when the three-dimensional image is reproduced using the plurality of associated video signals; And And a recording unit for recording the at least one AV stream and the three-dimensional reproducing unit information onto a recording medium, Wherein the information generating unit generates a plurality of pieces of three-dimensional reproducing unit information corresponding to each of the plurality of associated video signals, Wherein each of the three- A reproduction mode information indicating whether a corresponding video signal is a signal for reproducing a three-dimensional image, multiplexing format information indicating a multiplexing mode of the corresponding video signal, whether or not the corresponding video signal includes depth information And at least one of the image depth information indicating the corresponding video signal and the shooting information of the corresponding video signal. delete 14. The method according to claim 13, The relative position information indicating a relative position of the camera that captures the corresponding video signal, the focal length of the camera that captured the corresponding video signal, and the corresponding video signal, And an angle value indicating an angle between the photographed camera and the reference point. 14. The apparatus according to claim 13, wherein the three- Further comprising at least one of a maximum distance and a minimum distance between a camera that photographs the corresponding video signal and an object to be photographed when the corresponding video signal is a depth video signal. 14. The recording apparatus according to claim 13, Characterized in that the plurality of associated video signals are recorded in the form of video signals for providing a multi-angle or recorded as video signals for providing PIP (Picture In Picture) Device. 14. The method of claim 13, The recording medium is a Blu-ray disc, Wherein the recording unit records each of the three-dimensional reproducing unit information in a playitem relating to a corresponding video signal. 14. The method of claim 13, The recording medium is a DVD, Wherein the recording unit records each of the three-dimensional playback unit information in C_CAT or VTSI related to a corresponding video signal. A method for reproducing a three-dimensional image using at least one AV stream providing a plurality of associated video signals and three-dimensional reproduction unit information for use in reproducing a three-dimensional image using the plurality of associated video signals, And a reading unit for reading the at least one AV stream; A determining unit for determining whether the plurality of associated video signals are for reproducing a three-dimensional image based on the three-dimensional reproducing unit information; And And a reproducing unit for selectively reproducing the three-dimensional image using the at least one AV stream and the three-dimensional reproducing unit information according to the determination result, A plurality of three-dimensional reproducing unit information corresponding to each of the plurality of associated video signals is recorded on the recording medium, Wherein each of the three- The reproduction mode information indicating whether the corresponding video signal is a signal for reproducing a three-dimensional image, the multiplexing format information indicating a multiplexing mode of the corresponding video signal, the depth information And the image information of the corresponding video signal. delete 21. The apparatus according to claim 20, Wherein the controller reads the at least one AV stream at a speed two times faster than the reference speed if the plurality of associated video signals are determined to be a three-dimensional video signal. 21. The apparatus according to claim 20, And decodes the at least one AV stream simultaneously using a plurality of decoders when it is determined that the plurality of associated video signals are three-dimensional video signals. 21. The apparatus according to claim 20, A decoder for decoding the at least one AV stream; And And an output unit for outputting information regarding a video signal as a reference among the plurality of video signals and outputting the decoded AV stream to a display device for displaying a three-dimensional image. A recording medium on which at least one AV stream providing a plurality of video signals is recorded, Dimensional reproducer unit information to be used when the three-dimensional image is reproduced using the plurality of video signals, Wherein a plurality of three-dimensional reproducing unit information corresponding to each of the plurality of video signals is recorded on the recording medium, Wherein each of the plurality of three- A reproduction mode information indicating whether a corresponding video signal is a signal for reproducing a three-dimensional image, multiplexing format information indicating a multiplexing mode of the corresponding video signal, a video signal indicating whether the corresponding video signal is a depth video Depth information, and photographing information of the corresponding video signal. delete 26. The method of claim 25, The recording medium is a Blu-ray disc, And each of the three-dimensional reproducer-side information is recorded in a playitem relating to a corresponding video signal. 26. The method of claim 25, The recording medium is a DVD, And each of the three-dimensional reproducer-side information is recorded in C_CAT or VTSI related to a corresponding video signal.
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