JP2001197417A - Optical disk, its recorder, reproduction device, recording method and reproduction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk and an optical disk recording/reproducing device, that can effectively utilize VBI data multiplexed on a video signal. SOLUTION: A video object (VOB) consists of a plurality of VOB units (VBOU), each VOBU includes a control pack (C-PCK) on which control information is recorded, a video pack (V-PCK) and an audio pack (A-PCK) that have a reproduction time of one second or below, and the C-PCK indicates display control and copy control of each VOBU. The optical disk recording/reproducing device extracts VBI data multiplexed on a video signal for its vertical blanking period in the case of the video recording by the VOBU, and loads the C-PCK, on which the control information generated from the extracted VBI data is set, to the head of each VOBU. The VBI data are multiplexed on a reproduced video signal in accordance with the control information of the C-PCK in the case of reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a readable / writable optical disk, and a recording method and a reproducing method thereof. In particular, the present invention relates to an optical disk on which moving image data is recorded, and a recording method and a reproducing method thereof.

[0002]

2. Description of the Related Art In recent years, in the field of rewritable optical disks, the upper limit of which is about 650 MB, a phase change optical disk (DVD-RAM: Digital Video Disc) having a capacity of several GB.
-Random Access Memory) has appeared. DVD-RAM
Is expected as a recording medium for video / audio data (AV data: Audio Video data) in addition to the purpose of recording computer data. That is, the conventional typical AV
Magnetic tapes and video tape recorders (VTRs) are widely used as data recording media and recording devices, but optical disks and optical disk recording / reproducing devices are expected.

An optical disk recording / reproducing apparatus used as a replacement for a stationary VTR receives a television broadcast, converts (compresses) the received television signal into digital AV data, and records it on a DVD-RAM. Also,
At the time of reproduction, AV data is read from an optical disk recording device DVD-RAM optical disk, converted into an analog video / audio signal, and output to a display device. Here, the AV data is generated according to a standard called MPEG (ISO / IEC13818).

[0004] In recent years, in analog television broadcasting, a vertical blanking period (Vertical Blanking) in a broadcast signal is used.
g Interval) (hereinafter referred to as VBI) may be multiplexed with digital data. For example, in teletext, the character data is V
BI multiplexed. NTSC (National Television
In the case of a television signal (or video signal) of the System Commitee system, one frame (two fields) is 525.
, And data can be multiplexed in the period from the 10th line to the 21st line and the period from the 273rd line to the 284th line among the horizontal scanning lines corresponding to VBI.

[0005] In addition to character data, VBI data includes letterbox control information and copy control information. Here, the letterbox control information is displayed on a display having an aspect ratio of 4: 3 with an aspect ratio of 16: 9 (or 14: 9).
Is information for controlling how to display the video. The copy control information is information indicating whether or not recording on the VTR is permitted. A method of multiplexing these as VBI data is described, for example, in Journal of the Institute of Television Engineers of Japan vol.49, No.9 (199
5), European broadcast standard ETS300 294 "Television Sy
stems 625-line television Wide Screen Signaling (WS
S) ".

[0006] Letterbox control information and copy control information are embedded in a program or CM. For example, VBI
Since data can be multiplexed for each field, C
By multiplexing VBI data that changes the display method only during the M period and permits copying, it is possible to control to change the display method (such as the aspect ratio of video) only during the CM period.

A VTR capable of recording in the S-VHS (Super-Video Home System) system is capable of recording a television signal on a tape with VBI data superimposed, and a signal reproduced on a display device during reproduction. Is output. As a result, the display device transmits the letterbox control information to the VBI.
It is possible to realize the control of the letterbox type video which is recognized as data and synchronized with the video signal.

[0008]

However, when an optical disk recording apparatus receives a current analog television broadcast, encodes the received television signal into digital compressed data, and records it on an optical disk, the above-described method is used. There is a problem that VBI data is missing. As a result, when reproducing the AV data recorded on the optical disk in the optical disk recording device, it is impossible to control the display or copy permission / prohibition only during the CM period of about 15 seconds or 30 seconds.

An object of the present invention is to provide an optical disk, an optical disk recording device, an optical disk reproducing device, an optical disk recording method, and an optical disk reproducing method that effectively use VBI data multiplexed on a video signal.

[0010]

An optical disk according to the present invention is a recordable optical disk on which a video object is recorded. The video object includes one or more video object units. Includes control information and video data and has a reproduction time of 1 second or less, and the control information indicates at least one of display control and copy control for a video object unit including the control information.

Here, the control information represents data content multiplexed in a vertical blanking interval of the analog video signal, and at least one of a display position, a copy management condition, and a material type for a video object unit including the control information. Is shown. Each video object unit includes one control pack and a video pack including video data, and the control pack is arranged at the head of each video object unit and includes the control information.

The control information further includes status information indicating whether or not the content is valid. The control information includes, specifically, letterbox control information, video aspect ratio, subtitle mode information indicating a subtitle position, and film / camera mode information indicating whether a video of a material is shot by a television camera or a movie film. , Analog protection information indicating the type of copy protection method applied to the analog video signal, and source information indicating whether or not the video used as the material is an analog record medium.

[0013] Furthermore, in addition to the video object including control information, the optical disk records a video object not including control information and at least one stream information. The stream information may correspond to one to one, and the stream information may include aspect ratio information indicating an aspect ratio of the video object and an application flag.

The application flag indicates the following (a) or (b) (a) The corresponding video object is coded with the aspect ratio indicated by the aspect ratio information.
(B) The corresponding video object is not always encoded at the aspect ratio indicated by the aspect ratio information, and the aspect ratio recorded in the control pack has priority.
An optical disk recording apparatus according to the present invention includes: an extracting unit configured to extract additional data indicating at least one of display control and copy control from a video / audio signal; and a video object having a reproduction time of 1 second or less by encoding the video / audio signal. Encoding means for generating a video object composed of units; generating means for generating, for each video object unit, control information indicating at least one of display control and copy control based on the additional data extracted by the extracting means; And control means for controlling the encoding means so as to insert the control information generated by the above into each video object unit.

An optical disk reproducing apparatus according to the present invention is a reproducing apparatus for reproducing a video object recorded on an optical disk. The reproducing means reads a video object from the optical disk, and outputs video data, Separating means for separating audio data and control information, decoding means for generating a video and audio signal by decoding the separated video data and audio data, and a vertical blanking period of the video and audio signal corresponding to the video object unit. Multiplexing means for multiplexing the additional data based on the control information separated from the video object unit.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the main technical terms used in this specification will be defined. Video object (VOB) VOB is stream data generated from one real-time recording, and is ISO / IEC13181.
-1 (Information Technology-Genericcoding of mo
ving pictures and associated audio: Systems). A VOB is composed of one or more video object units (VOBU) including video data and audio data. In the present invention, the VOBU further includes display control information and copy control information. Video object unit (VOBU) A VOBU is composed of one or more GOPs and is a component of the VOB. VOBUs other than the end of the VOB have a reproduction time of 0.4 second to 1 second. The trailing VOBU may be less than 0.4 seconds. That is, the playback time of the last VOBU may be 0.4 seconds or less due to the timing of stopping recording. VOBU is a pack sequence arranged in the recording order. The first pack of the VOBU is either a video pack or a control pack, and has a system header. If the VOBU has a control pack at the top, the V
All VOBUs in a VOB including an OBU have a control pack, and if a VOBU has a video pack at the beginning,
All VOBUs in the VOB including the VOBU have no control pack. Group of pictures (GOP) GOP is based on the MPEG video standard ISO / IEC1318.
1-2, at least one I (Intra)
It is picture data including a picture (a picture coded in a frame / field), and is a unit that can be independently reproduced. -Pack A fixed length of 2 kbytes, such as a video pack, an audio pack, and a control pack. The control pack is a characteristic part of the present invention, includes display control information and copy control information, and is arranged at the head of the VOBU.

(1) Outline of Optical Disk Recording / Reproducing Apparatus The optical disk recording / reproducing apparatus 1 of the present invention is a stationary VT
R, which is connected to the television receiver 2 as shown in FIG. 1, and digitizes and encodes a video / audio signal included in a television signal or a video signal to thereby generate compressed video / audio data (hereinafter referred to as video data). A VOB is referred to as an object and is recorded on an optical disk, and the VOB recorded on the optical disk is reproduced.

At the time of this recording, the optical disk recording / reproducing device performs the operation of an analog television signal (or video signal).
(Vertical Blanking Interval) data included in the video object unit (hereinafter referred to as VOBU) which is a component of the VOB.
It is configured to insert a control pack describing information indicated by the I data (letter box control information or copy control information).

Further, the optical disk recording / reproducing apparatus is configured to multiplex VBI data with the reproduced video signal in accordance with the information described in the control pack when reproducing the VOB recorded on the optical disk. Accordingly, the display device for displaying the reproduced video signal during the reproduction of the optical disk by the optical disk recording / reproducing device is provided by the V
It is possible to control the display method (such as the aspect ratio of video) and the permission / prohibition of copying for each OBU.

(2) Configuration of Optical Disk (2.1) Physical Configuration of Optical Disk The optical disk in the embodiment of the present invention is a DVD-RA
M will be described as an example. The physical configuration of a DVD-RAM is disclosed in detail in JP-A-8-7282, which discloses a method of recording data on both lands and groups, and JP-A-7-93873, which discloses a zone CLV (constant linear velocity). And will not be described in detail here. Hereinafter, a data structure which is a feature of the present invention in a DVD-RAM will be described.

(2.2) Logical Configuration of Optical Disk (DVD-RAM) FIG. 2 shows an outline of a lead-in area, a data area, and a lead-out area provided in the area of the optical disk, and an outline of a file configuration recorded in the data area. FIG. In the same figure, the lead-in area is at the beginning (the innermost part)
A reference signal necessary for stabilizing the servo control in the optical disk recording / reproducing apparatus, an identification signal with another medium, and the like are recorded in the. Following the lead-in area is a data area. In the data area, a file storing VOBs and management information is recorded. A lead-out area exists at the end (outermost periphery). In this area, the same reference signal as that in the lead-in area is recorded.

At the head of the data area, information for a file system called volume information is recorded. Since the file system is publicly known, its description is omitted. FIG. 1 shows a configuration example of directories and files read and written through a file system. In this file configuration, a DV for storing all the files handled by the optical disc recording / reproducing apparatus immediately below the ROOT directory.
A D_RTAV (DVD_Real Time Audio Visual) directory is provided. The files stored in the DVD_RTAV directory include one management information file and V
It is roughly classified into two types of one or more AV files for OB recording.

In the figure, VR_VR_
MANGR. If the I / O is an AV file, VR_M
OVIE. VRO, VR_STILL. VRO, VR_
AUDIO. VRO and the like are shown. VR_MOV
IE. VRO is for recording moving images (including audio). VR
_STILL. VRO, VR_AUDIO. VRO is
These are for recording still images and audio, respectively.

(2.2.1) AV File FIG. 3 shows the VR_MOVIE. FIG. 4 is a diagram illustrating a data configuration of a VRO file. VR_MOVI as shown in FIG.
E. FIG. The VRO file is VOB (VOI in this file)
B is called M_VOB. ) # 1 to #N are arranged. N is a number of 1 or more. M_VOB is a term for distinguishing it from S_VOB (Still picture_VOB) representing a still picture. Hereinafter, the notation VOB indicates M_VOB unless otherwise specified.

Each M_VOB is composed of a plurality of VOBUs. The VOBU is composed of a fixed-size (2 kbytes) pack sequence. The pack includes a control pack (hereinafter C)
_PCK), a video pack (V_PCK), an audio pack (A_PCK), and the like. C_PCK is VO
It is arranged at the head of the BU and includes display control information such as letter box control and copy control information. Letterbox control refers to controlling how to display an image having an aspect ratio of 16: 9 (or 14: 9) on a display having an aspect ratio of 4: 3. Copy control information is VT
This is information regarding permission / prohibition of recording in R or the like and copy guard. The display control information and the copy control information are generated according to the content of VBI data multiplexed on the television signal (or video signal) at the time of recording in the optical disc recording / reproducing apparatus, and the VB
It is multiplexed as I data.

V_PCK includes video data. A set of V_PCKs in one VOBU is a GOP (Group Of
Picture). GOP is the MPEG video standard
It is defined by ISO / IEC (13818-2) and is divided into a plurality of V_PCK payloads in a VOBU. This GOP does not include audio data and control information. V_PCK corresponding to at least one GOP;
A unit including other packs (C_PCK, A_PCK) is called a VOBU to distinguish it from a GOP.

A_PCK includes audio data.
Audio data is MPEG audio, Dolby A
C3, data encoded by linear PCM or the like. V_PCK and A_PCK are interleaved in the VOBU. (2.2.1.1) Control Pack (C_PCK) FIG. 4 is a diagram showing the data structure of C_PCK. As shown in the figure, the control pack has a pack header (size is 14 bytes), a system header (24 bytes), and a packet (20 bytes).
10 bytes). The packet has a packet header (6
Byte), a substream ID (1 byte), and a data portion (2003 byte).

The pack header is an SCR (System) that determines a pack position (multiplex timing) in the VOB.
Clock Refference). The system header is VO
This is a header indicating a boundary between a BU and a VOBU. The control pack includes a system header because it is arranged at the head of the VOBU. The packet is placed in the payload of the pack.

The packet header is a stream I meaning a private stream 2 defined by the MPEG standard.
D (1011111b). The substream ID is C_P
This is an ID (01010000b) indicating a CK. The data section contains display control information (hereinafter DCI: Display Control I).
nformation) and copy control information (hereinafter CCI: Copy Cont)
rol Information) and status information (DCI_CCI_SS: DCI_CCI_Status) indicating their status.

(2.2.1.1.1) DCI FIG. 5 is a diagram showing a detailed bit configuration of DCI in C_PCK. As shown in the figure, DCI includes an aspect ratio, a subtitle mode, and a film / camera mode. The aspect ratio is 4-bit data instructing letterbox control. Here, the letterbox control will be described. FIG. 6 is a diagram illustrating a relationship between a television screen size and a video size. X: Y is the aspect ratio of the TV screen, X ': Y'
Is called an image aspect ratio. The aspect ratio of the video
An image of X ': Y' = 16: 9 or 14: 9 is called a letterbox type image. For example, when a letterbox type image is displayed on a TV of X: Y = 4: 3, the upper and lower portions are displayed in black as shown in the figure, or the image is shifted upward and displayed in black, or the image is displayed. There are several methods, such as stretching the image vertically. Information indicating such a control method is called letterbox control information. The letterbox control information generally has both X ′: Y ′ information and two pieces of information of Y: Z or Y: Z ′ with respect to the center O of the image.

The aspect ratio represented by 4 bits (b7 to b4) in DCI has the following meaning. 0000b: 4: 3 0001b: 16: 9 1000b: 14: 9 Letterbox displayed at center 0100b: 14: 9 Letterbox displayed at top 1101b: 16: 9 Letterbox displayed at center 0010b: 16: 9 Letterbox 1011b: 16 or more: 9 Letterbox is displayed in the center 0111b: 14: 9 Full display Other: Reserved The first two (0000b and 0001b) indicate the aspect ratio of the image, and the rest are letterboxes For control. The example of FIG. 6 shows a case where a 16: 9 letter box is displayed at the center.

The subtitle mode represented by 2 bits (b3, b2) in DCI has the following meaning. 00b: no subtitles 01b: subtitles in the active video (in active image area) 10b: subtitles out of the active video (out of active image area) 11b: reserved Here, valid in the example of letterbox type video in FIG. The term “in the video” refers to the video that is actually displayed, and the term “outside the effective video” refers to the portion of the video that is displayed black. For example,
In the PAL (Phase Alternation by Line) method, in the case of a full video with an aspect ratio of 4: 3, the video is 576 lines in all 625 lines, and the aspect ratio is 16: 9.
430 out of 625 lines
On the line. In the case of PAL, “in the effective image” is a case where subtitles are described in the above 430 lines,
“Outside the effective image” is a case where subtitles are described in 576-430 = 146 lines (portions displayed in black). Note that lines other than the 576 lines correspond to VBI.

The film / camera mode represented by one bit (b0) in DCI has the following meaning. 0b: Camera mode 1b: Film mode The form camera mode is defined in PALplus, a European video image processing method, in which the material of the image is taken with a television camera or film movie. Is shown.

The outline of the display control based on the aspect ratio, the subtitle mode, and the film / camera mode is described in the Journal of the Institute of Television Engineers of Japan vol.49, No.9 (1995).
For details, see the European broadcast standard ETS300 294 "Televis
ion Systems 625-line television Wide Screen Signal
ing (WSS) ". The bit configuration of the DCI is such that those defined by the PAL system and the NTSC system can be shared.

(2.2.1.1.2) CCI FIG. 7 is a diagram showing a detailed bit configuration of CCI in C_PCK. As shown in the figure, CCI is CGMS (Copy G
eneration Managing System), APSTB (Analogue
Protection System Trigger Bits), including source information. CGMS is 2-bit (b7, b6) data for managing generation-specific copies, and has the following meaning.

00b: Copy permitted (no restriction) 01b: This state is not used 10b: This state is not used 11b: Copy prohibited In the optical disc recording / reproducing apparatus, the information multiplexed on the input video signal is "copy prohibited". Indicates that the recording operation is to be stopped, and indicates that "one generation copy is permitted".
Recording is performed with S set to 11b (copy prohibited), and when "copy permitted" is set, CGMS is set to 00b for recording.

The APS is a copy protection method for analog video signals developed by Macrovision Corporation (also referred to simply as Macrovision). Two bits (APS) indicate the type of copy protection applied to an input video signal. b5, b4). It has the following meaning. 00b: No copy protection 01b: Type 1 10b: Type 2 11b: Type 3 The above type 1 is a method for disturbing AGC (disturbing the AGC circuit of the VTR), and type 2 is a method for dispersing AGC and color stripe 2 lines. 3 is AGC
This is a method of disturbing and inverting four lines of a color stripe.
The optical disc recording / reproducing apparatus sets APSTB according to APS information multiplexed on the input video signal.

The source information is 1-bit (b3) data for classifying the material, and has the following meaning. 0b: Analog prerecord package media 1b: Other than analog prerecord package media Source information is VBI data of the input video signal
And set by the material provider. Details are defined in CEI / IEC6880, 199801, Section 3 (VBID). “0b” indicating the analog prerecord package medium is based on a video signal input to the optical disk recording / reproducing apparatus 1 based on a material (for example, a laser disk) corresponding to commercial movie software or the like pressed at a factory. Is set if “1b” is set when the video signal input to the optical disc recording / reproducing apparatus 1 is based on a material other than the above (for example, a material created by a broadcasting station).

(2.2.1.1.3) DCI_CCI_SS FIG. 8 shows the status information DCI_CCI in the control pack.
It is a figure which shows the bit structure of _SS. As shown in FIG.
I_CCI_SS is DCI_SS (DCI_StatuS), C
CI_SS (CCI_StatuS). DCI_SS is D
This is 2-bit data indicating a valid part of the CI, and has the following meaning.

00b: DCI is invalid 01b: Only aspect ratio is valid among DCIs 10b: Undefined 11b: Aspect ratio, subtitle mode and film / camera mode are valid The value of DCI_SS is “01b” in one VOB. It can only change between "11b".

CCI_SS is 3-bit data indicating a valid part of CCI, and has the following meaning. 000b: Invalid CCI 001b: Valid only source information 010b: Valid only APS information 011b: Valid only APS information and source information 100b: Valid only CGMS information 101b: Valid only CGMS information and source information 110b: Valid only CGMS information and APS information 111b: CGMS information, APS information, and source information are valid If both DCI_SS and CCI_SS are zero, it indicates that DCI and CCI are invalid.

(2.2.2) Management Information File FIG. 9A shows the management information file VR_M shown in FIG.
ANGR. FIG. 3 is a diagram hierarchically showing a data structure of an IFO. As shown in the figure, VR_MANGR. IFO is RTR
_VMG (Real Time Rekording_Video Manager), which is also called RTR_VMGI (RTR_VMG Info
rmation), M_AVFIT (Movie AV File Infomatio)
n Table), S_AVFIT (Still picture AV File I
nfomation Table), ORG_PGCI (Original Prog
ram Chain Information), UD_PGCIT (User De
fined PGC Information Table), TXTDT_MG (T
ext Data Manager), MNFIT (Manufacturer's Inf)
ormation Table).

Hereinafter, V_ATR which is a feature of the present invention will be described.
The following mainly describes the parts related to. M_AVFIT is
Management information corresponding to the moving image AV file “VR_MOVIE.VRO” is recorded, and M_AVFITI (Movie AV
file Information TableInformation), one or more M
_VOB_STI (Movie VOB Stream Information) #
1 to #n, M_AVFI (Movie AV file Informatio
n). Where n is VR_MOVI
E. FIG. It is the same as the number of VOBs in the VRO file. However, when a plurality of VOBs share one M_VOB_STI, n is smaller than the number of VOBs. That is, VOB
And M_VOB_STI correspond one-to-one or many-to-one. Regarding the correspondence, VOB in M_AVFI
M_VOB_ST set to I (VOB Information)
Indicated by I number. The VOBI corresponds to the VOB on a one-to-one basis and is provided for each VOB. In FIG. 9C, M_AV
Indicates the storage location of the M_VOB_STI number in the FI. M
_AVFI is the same number of VOBIs as VOBs (M_V
OBI). The VOBI includes time map information related to the VOB and M_VOB_GI (M_VOB_Gereral Inform).
ation). M_VOB_GI is the time at which the head of the VOB was recorded, or the number of M_VOB_STI (M
_VOB_STIN).

M_VOB_STI in FIG. 9A is VR
_MOVIE. One or more VOBs in the VRO file
, And represents various information related to the VOB.
ATR (Video Attribute), AST_Ns (Number of
Audio streams), SPST_Ns (Number of Sub-Pi)
cture streams), A_ATR0 (Audio Attribute for
stream # 0), A_ATR1 (Audio Attribute for st
ream # 1), SP_ATR (Sub-Picture Attribute),
SP_PLT (Sub-picture color palette).

V_ATR is VR_MOVIE. VRO
This shows the attributes of the video represented by the corresponding VOB in the file. FIG. 9B shows the bit configuration of V_ATR. As shown in the figure, V_ATR includes a video compression mode, a television system, an aspect ratio, an application flag, a line 21 switch 1, a line 21 switch 2, and a video resolution.

The video compression mode is 2-bit data. "00b" means that the data has been compressed according to MPEG1, and "01b" means that the data has been compressed according to MPEG2. The television system is in a 2-bit mode, where "00b" means 525/60 (the number of scanning lines in one frame / the number of fields per second), and "01b" means 625/50. The former is NTSC, the latter is PAL or SECAM
(Se-quential couleur a Me-moire) TV system.

The aspect ratio is 2-bit data representing the aspect ratio of the video of the corresponding video object. The aspect ratio is 4: 3 for "00b" and 16: 9 for "01b". This aspect ratio is one VOB
It means aspect ratio for the whole, but D of C_PCK
It must be interpreted so as not to contradict the aspect ratio for each VOBU indicated in CI. This interpretation depends on the following application flags.

The application flag is 2-bit data indicating the relationship between the aspect ratio in V_ATR and the aspect ratio in DCI in C_PCK. This value is "00"
If "b", it means that the video has an aspect ratio within the V_ATR over the entire corresponding VOB.
In this case, C_PCK does not exist in the VOB, or the aspect ratio in C_PCK is ignored.

Also, if "01b", VO
The image does not have the aspect ratio in the V_ATR throughout B, but actually means the aspect ratio in the C_PCK. That is, when the aspect ratio in V_ATR is different from the aspect ratio in C_PCK, the aspect ratio in C_PCK is interpreted with priority. If C_PCK does not exist in the VOB, the video is interpreted as having an aspect ratio of V_ATR. Also, V_ATR (M_VOB_STI) is used for a plurality of VOBs.
And the plurality of VOBs having C_PCK
If OBs and VOBs that do not have are mixed, C_PC
For VOBs with K, the aspect ratio in C_PCK takes precedence, and for VOBs without VOB, the video is V_AT
Interpreted as the aspect ratio in R.

Note that DCI_SS is set to “01b” or “1”.
1b, the application flag corresponding to the VOB including the control pack is set to “01b.” Here, the application flag corresponding to the VOB is set to VO.
M_VOB_ specified by the VOBI corresponding to B
It is included in V_ATR in STI. DCI_SS is “0”
0b ", the application flag is" 00 "
b ”.

If the line 21 switch 1 is “1b”, the data multiplexed on the 21st horizontal scanning line of field 1 (mostly closed caption data) is recorded in the VOB. If it is "0b", it means that it is not recorded. Line 21 switch 2
Is the same as line 21 switch 1 except for field 2 instead of field 1.

The video resolution is 3-bit data indicating the resolution of the video indicated by the VOB. In the 525/60 television system, the 3-bit data is 000b, 0
For 01b, 010b, 011b, 100b, and 101b, the resolutions are 720 × 480 and 704 × 48, respectively.
0, 352 × 480, 352 × 240, 544 × 48
0, 480 × 480. In the 625/50 television system, the 3-bit data is 000b, 001b, 010b, 011b, 100
b and 101b, the resolution is 720 × 57, respectively.
0, 704 × 576, 352 × 576, 352 × 28
8, 544 × 576, 480 × 576.

Since the V_ATR is stored in a management information file (VR_MANGR.IFO) different from the AV file, if the application flag is "00b", the optical disk recording / reproducing apparatus does not reproduce the VOB without reproducing the AV file. The video attribute of the unit can be read from V_ATR. The video attribute for each VOB is V_
By ATR, video attribute in VOBU unit is C_PCK
Is set by Further, a video object having control information and a video object having no control information may coexist, and the size of a video object having no control information can be reduced by the size of the control information.

(3) Configuration of Optical Disk Recording / Reproducing Apparatus FIG. 10 is a block diagram showing a configuration of the optical disk recording / reproducing apparatus 1 shown in FIG. As shown in the figure, the optical disc recording / reproducing apparatus 1 includes a high-frequency receiving section 71, a video demodulating section 72,
VBI data demodulator 73, buffer 81, switch 8
2, a DVD recorder 75, a data transfer unit 83, and a VBI signal superposition unit 84.

The high frequency receiving section 71 receives a desired television signal from a broadcast wave. The video demodulation unit 72 demodulates the television signal received by the high-frequency reception unit 71 to convert it into a video signal and an audio signal.
The data is output to the DVD recorder 75 via the switch 82.
The VBI data demodulation unit 73 detects VBI data included in the video signal from the video demodulation unit 72, generates DCI, CCI, DCI_CCI_SS from the VBI data,
Output to the VD recorder 75. The time lag from the output of the video signal and the audio signal from the video demodulation unit 72 to the output of DCI, CCI, and DCI_CCI_SS from the VBI data demodulation unit 73 is absorbed by the buffer 81 and the switch 82. As a result, the video signal, the audio signal, and the DCI, CCI, DCI_CCI_SS are input to the DVD recorder 75 in synchronization with each other.

The DVD recorder 75 compresses the video signal and the audio signal input from the video demodulation unit 72 via the buffer 81 and the switch 82 and records the VOB on the DVD-RAM. At this time, the DVD recorder 75 outputs the DCI, CCI, DCI_C input from the VBI data demodulation unit 73.
CI_SS is recorded in VOBU units. DVD
The recorder 75 decodes the VOB recorded on the DVD-RAM, outputs an analog video / audio signal, extracts DCI and CCI from the VOBU, and outputs the extracted DCI and CCI to the VBI signal superimposing unit 84.

The VBI signal superimposing section 84 adds a DV signal to the VBI of the analog video signal input from the DVD recorder 75.
The VBI data is multiplexed according to DCI and CCI input from the D recorder 75. The data transfer unit 83 is a DVD
A digital video / audio signal after being decoded by the recorder 75 is input to an external PC (personal computer).
And so on. At this time, it controls whether or not to perform data transfer according to the CCI input from the DVD recorder 75.

(3.1) VBI Data Demodulation Unit FIG. 11 is a block diagram showing a detailed configuration of the VBI data demodulation unit 73. In the figure, a VBI data demodulation unit 73 includes a VBID detection unit 731, a DCI generation unit 732,
It comprises an MV detection unit 733 and a CCI generation unit 734. The VBID detection section 731 outputs the VBID included in the VBI for each field of the video signal input from the video demodulation section 72.
Detect I data. In the following, the VBI data is NT
The SC signal is superimposed as 20-bit data on 20H (20th horizontal line) and 283H, and the PALplus is superimposed as 13-bit data on 23H. In the 20-bit data, 2 bits (b1,
b2) is the aspect ratio, and 2 bits (b7, b8) are the CG
MS, 2 bits (b9, b10) indicate APSTB, and 1 bit (b11) indicates whether or not it is an analog predecode medium. In the above 13-bit data,
4 bits (b3 to b0) are aspect ratio, 1 bit is (b4) is camera / film mode, 2 bits (b9,
b10) indicates the subtitle mode. The VBID detector 731 detects the 20-bit data from the NTSC signal and the 13-bit data from the PAL signal.

The MV detection section 733 detects whether or not Macrovision (copy protection method) is applied to the video signal input from the video demodulation section 72. (3.1.1) DCI Generation Unit The DCI generation unit 732 has a 1-byte DCI register and a 2-bit DCI_SS register inside, and
DCI and DCI_SS are generated based on the VBI data detected by the D detection unit 731, and the generation result is set in the internal register. The data held in the internal register is D
It is output to the VD recorder 75.

FIG. 12 is a flowchart showing detailed generation processing of DCI generation section 732. In FIG.
The I generation unit 732 causes the VBID detection unit 731 to
It is determined whether data has been detected (step 12).
1) If present, if the video signal is an NTSC signal (step 122), “0” is stored in the DCI_SS register.
1b "(step 123). The reason why the DCI_SS register is set to" 01b "is that only the aspect ratio of the display control information in the NTSC signal is enabled.

Further, DCI generation section 732 outputs VBID
Two bits (b1, b2) in the 20-bit VBI data detected by the detection unit 731 are converted into 4-bit data according to the conversion table shown in FIG. 13, and set to (b7 to b4: aspect ratio) of the DCI register. , The other parts of the DCI register (subtitle mode, film / camera mode) are set to "0" (step 124). However,
When the 2-bit data (b1, b2) is "11",
The DCI generation unit 732 stores “00” in the DCI_SS register.
b "is set.

If the video signal from which the VBI data is detected is a PAL signal, the DCI generator 732 outputs
_SS register is set to “11b” (step 12
5). The reason why “11b” is set in the DCI_SS register is that the display control information in the PAL signal sets the aspect ratio, the subtitle mode, and the film / camera mode to valid.

Further, DCI generation section 732 outputs VBID
(B3 to b3) of the 13-bit data detected by the detection unit 731
b0), (b9, b10) and (b4)
Each is converted according to the conversion tables of FIGS. 14 to 16, and the conversion result is set to the aspect ratio of the DCI register, the subtitle mode, and the film / camera mode (step 1).
26).

The VBID detector 731 detects the VBI
If it is determined that there is no data, the DCI generator 732 sets all bits of the DCI register and the DCI_SS register to “0b” (step 127). After the DCI register and the DCI_SS register are set as described above, the DCI generation unit 732 outputs the data of the DCI register and the DCI_SS register to the DVD recorder 75.

(3.1.2) CCI Generation Unit The CCI generation unit 734 has a 1-byte CCI register and a 3-bit CCI_SS register internally,
VBI data and MV detected by the D detection unit 731
CCI and DCI_S based on the detection result of detection section 733
S is generated, and the generation result is set in the internal register. The data held in the internal register is output to the DVD recorder 75.

FIG. 17 is a flowchart showing a detailed generation process of the CCI generation unit 734. In the figure, CC
The I generation unit 734 determines that the video signal from the video demodulation unit 72 is N
If VBI data is detected by the VBID detection unit 731 according to the TSC system (step 171), the CCI
_SS register is once set to “111b” (step 172), and the “20” detected by the VBID
If the bits (b7, b8) of the bit data are "11b" (copy impossible) (step 173), a recording stop signal is output to the switch 82 and the DVD recorder 75 (step 174). As a result, when the VBI data indicates that copying is not possible, the switch 82 is turned off, the video signal is not output to the DVD recorder 75, and the recording operation of the DVD recorder 75 on the DVD-RAM is stopped. Thereafter, when the VBI data no longer indicates that copying is not possible, the recording stop instruction is released, the buffer 81 is cleared, the switch 82 is turned on at the same time, and the recording operation is restarted.

Further, the CCI generation unit 734
If the bits (b7, b8) of the 20-bit data detected by the detection unit 731 are “01b” (undefined) (step 175), “011b” is stored in the CCI_SS register.
Is set (step 176). If the MV detection unit 733 detects that Macrovision is not applied (step 177), b2 of the CCI_SS register
Is set to “0b” (step 178).

Subsequently, the CCI generator 734 determines the bits (b7, b8), (b9, b10) of the 20-bit data,
(B11) is converted into CGMS, APSTB, and source information using the conversion tables of FIGS. 18, 19, and 20 (step 179), and is set in the CCI register.
When the video signal from the video demodulation unit 72 is not of the NTSC system, the CCI generation unit 734
1 if no VBI data is detected by CCI_
All bits of the SS register and the CCI register are set to "0" (step 180). This is the case where no copy control information exists.

DCI generator 732 and CCI generator 73
4 performs the above-described generation processing for each field of the video signal input from the video demodulation unit 72,
The data of the CI register, the DCI_SS register, and the CCI_register are output to the DVD recorder 75. Hereinafter, data output from the DCI register is referred to as DCI data, data output from the CCI register is referred to as CCI data, and data output from the DCI_SS register and the CCI_SS register are referred to as DCI_CCI_SS data. The DVD recorder 75 receives DCI data, CCI data, and DCI_CCI_SS data for each field.

(3.2) DVD Recorder FIG. 21 is a block diagram showing a detailed configuration of the DVD recorder 75 in FIG. The DVD recorder 75 includes a user interface unit (hereinafter, referred to as a U / I unit) 140
1, system control unit 1402, video / audio input unit 140
3, encoder section 1404, output section 1405, decoder section 1406, track buffer 1407, drive 14
08, and a control information input unit 1409.

User interface section 1401 has an operation panel and a remote control light receiving section, and receives a user operation from the operation panel and a signal from a remote control as shown in FIG. The system control unit 1402 receives an instruction from the user interface unit 1401 such as recording start, recording end, reproduction start, reproduction end, and the like, and performs overall control of the recording operation and the reproduction operation according to the instruction. In particular, in the recording operation, the system control unit 1402 controls the DCI data, CCI data, and DCI_V input from the VBI data demodulation unit 73 for each field via the control information input unit 1409.
Control information to be inserted into the control pack at the head of the VOBU is determined based on the CCI_SS data (collectively referred to as control information), and the determined control information is output to the encoder unit 1404. The control information is transmitted to the system control unit 1 at minimum in field units (1/60 or 1/50 second).
402, the system control unit 140
2 is an encoder unit 14 in VOBU units (0.4 to 1 second).
04. The field position where the content of the VBI data changes does not always coincide with the head of the VOBU. For this reason, the system control unit 1402 detects a change in control information input for each fold during the period from the beginning of the VOBU to the beginning of the next VOBU, and controls to insert the most appropriate control information at the beginning of the next VOBU.

The video / audio input unit 1403 inputs a video signal and an audio signal from the video demodulation unit 72 via the buffer 81 and the switch 82, and outputs them to the encoder unit 1404. The encoder unit 1404 includes the system control unit 14
V_P by compressing the video signal and audio signal input from the video / audio input unit 1403 under the control of
CK and A_PCK are generated, C_PCK is generated from control information input from the system control unit 1402, and VOB
A VOB in which C_PCK is arranged at the head of U is generated.

The track buffer 1407 temporarily stores the VOB generated by the encoder 1404 during recording, and temporarily stores the VOB read from the DVD-RAM during reproduction. Drive 1408 is a DV
Servo control and rotation control at the time of recording / reproduction by mounting a D-RAM, write the VOB stored in the track buffer 1407 to the DVD-RAM through the optical pickup, and write the VOB recorded on the DVD-RAM to the optical pickup. Read through the track buffer 140
7 is stored. Reading / writing to / from the DVD-RAM is actually performed in units of ECC (Error Correcting Code) blocks (16 sectors = 2 Kbytes × 16 packs).

The decoder unit 1406 is connected to the system control unit 1
Under the control of 402, a VOB read from the DVD-RAM and input through the track buffer 1407 is expanded to generate a video signal and an audio signal. At that time, C_P
The control information is extracted from CK, and V is output via the output unit 1405.
It outputs to BI signal superposition section 84. The output unit 1405 converts the video signal and the audio signal input from the decoder unit 1406 from digital to analog, and
Output to The output unit 1405 is connected to the decoder unit 14.
06, DCI, CCI, DCI_CCI_
SS is output to the VBI signal superposition section 84.

The control information input unit 1409 inputs control information from the VBI data demodulation unit 73 and
02 is output. (3.2.1) Encoder Unit FIG. 22 is a block diagram showing a detailed configuration of the encoder unit 1404 in FIG. As shown in the figure, the encoder unit 1404 includes a video encoder 1501, a buffer 15
02, audio encoder 1503, audio encode buffer 1504, control information buffer 1505,
System time clock unit (abbreviated as STC unit) 150
6, encoder control unit 1507, system encoder 1
508.

The video encoder 1501 encodes (compresses) the video signal input from the video / audio input unit 1403 according to MPEG2 and stores the compressed video data in the video encode buffer 1502. The audio encoder 1503 encodes (compresses) the audio signal input from the video / audio input unit 1403 and stores the compressed audio data in the audio encode buffer 1504.

The control information buffer 1505 temporarily holds control information input from the system control unit 1402. The STC unit 1506 generates a clock signal (system time clock) that is the basis of the encoding operation.
The encoder control unit 1507 controls the encoding operation of the entire encoder unit 1404. The encoding operation starts and ends according to a start instruction and an end instruction from the system control unit 1402. In the encoding operation, the encoder control unit 1507 notifies the system control unit 1402 of the completion of VOBU encoding every time one VOBU is encoded, and, when notified of an instruction to insert control information at the head of the VOBU, sends a control information buffer. The control information is output from 1505 to the system encoder 1508.

The system encoder 1508 includes a control information buffer 1505, a video encode buffer 150
2. By extracting control information, compressed video data and compressed audio data corresponding to the payload size of a pack (or packet) from the audio encode buffer 1504, creating C_PCK, V_PCK, and A_PCK, and interleaving the created packs V
OBUs are sequentially created and output to the track buffer 1407.

(3.2.1.1) System Encoder FIG. 23 is a block diagram showing a detailed configuration of the system encoder 1508. As shown in the figure, the system encoder 1508 includes a virtual playback time counting unit 1601, a video packing unit 1602, a virtual decoder buffer 1603,
An audio packing unit 1604, a virtual decoder buffer 1605, a C_PCK packing unit 1606, and an interleave unit 1607 are provided.

The virtual reproduction time counting section 1601 generates a time stamp (SCR, DTS (Decode Tim) given to each pack based on the STC generated by the STC section 1506.
e Stamp), PTS (Presentation Time Stamp, etc.) are generated as reference times (virtual reproduction times). Here, DTS is a time stamp indicating the time at which the decoder unit 1406 starts decoding in the reproducing operation, and PTS is a time stamp indicating the time at which the video data or audio data decoded in the reproducing operation is displayed or output.

The video packing unit 1602 extracts compressed video data from the video encoding buffer 1502, and V_PC on which the extracted compressed video data is loaded.
K are sequentially generated. At this time, the time stamp is determined so as not to cause overflow and underflow in the virtual decoder buffer 1603. The virtual decoder buffer 1603 is a virtual buffer for simulating the data occupancy of a buffer that temporarily stores compressed video data during a playback operation.

The audio packing unit 1604 extracts compressed audio data from the audio encoding buffer 1504, and sequentially generates A_PCK on which the extracted compressed audio data is loaded. At this time, the time stamp is determined so that overflow and underflow do not occur in the virtual decoder buffer 1605.

The virtual decoder buffer 1605 is a virtual buffer for simulating the data occupancy of a buffer that temporarily holds compressed audio data during a reproducing operation. Packing section 1606 for C_PCK
Is the control information (DCI data, CCI data, DCI_CCI_SS) input from the control information buffer 1505.
) Is used to generate C_PCK shown in FIG. At this time, the packing unit 1606 for C_PCK
One C_PCK is generated for each U, and the SCR with the smallest value among the packs in the VOBU is assigned.

The interleave unit 1607 sequentially takes out the packs with the smallest SCR values from the packs generated by the C_PCK packing unit 1606, the video packing unit 1602, and the audio packing unit 1604, and extracts them. The pack sequence arranged in the arranged order is output to the track buffer 1407. At the start of encoding and at the end of encoding of one VOBU, the SCR of C_PCK is set to a value smaller than that of other packs. Therefore, C_PCK is always the first pack of the VOBU.

(3.2.1.2) Encoding Control Flow FIG. 24 is a flowchart showing the encoding control in the system control unit 1402 during the recording operation shown in FIG. As shown in the figure, the system control unit 1402
Upon receiving notification from the U / I unit 1401 that a recording start operation has been received (step 241), the control information input unit 1409
, It is determined whether control information is valid (either DCI_SS or CCI_SS is all bits other than “0”) or not (step 242). If valid control information is input, A change in control information is checked for control information for a plurality of fields in the VOBU, and the VOBU is checked.
The control information most suitable for the head is determined and written into the control information buffer 1505 (step 243). For example,
If there is no change in the control information for the five fields immediately before the picture (field) at the beginning of the VOBU, the control information is written to the control information buffer 1505. As described above, encoder section 1404 inserts C_PCK having this control information at the head of VOBU.

In step 243, the system control unit 1402 may simply write the control information of the field corresponding to the head of the VOBU to the control information buffer 1505 without checking the change. In this case, the processing load on the system control unit 1402 is further reduced. Further, the system control unit 1402 instructs the encoder unit 1404 (more precisely, the encoder control unit 1507) to start encoding (step 244), and controls the drive 1408 to write the encoding result to the DVD-RAM.

Thereafter, the system control unit 1402 determines whether there is a notification from the encoder control unit 1507 that the encoding of the VOBU has been completed, and whether there is a notification from the U / I unit 1401 that a recording end operation has been performed. It is determined whether or not it is (steps 245, 246). If there is a notification that the encoding of the VOBU has been completed, the system control unit 140
No. 2 instructs the start of encoding of the next VOBU in steps 242 to 244. As a result, C_PCK becomes V
A VOBU inserted at the head of the OBU is generated.

When the system control unit 1402 receives a notification that the recording end operation has been performed, the system control unit 1402
04 is instructed to stop encoding, and M_VOB_STI is created for the VOB written to the DVD-RAM (step 247). At this time, the system control unit 14
02 sets the value of the application flag in the V_ATR of the M_VOB_STI to a plurality of C_PCs in the VOB.
If the aspect ratio is changed in the middle of K, “01b” (video in VOB is C_PC for each VOBU)
If the same value is used without changing the aspect ratio specified for K, “00b” (the video in the VOB is the aspect ratio in the V_ATR over the entire VOB) is set. . Also, the system control unit 1402
Sets the aspect ratio value in the V_ATR to the value of the aspect ratio obtained from the control information input unit 1409 when the application flag is “00”, and when the application flag is “01”. Is set to one of the aspect ratio values obtained from the control information input unit 1409. In the latter case, for example, the aspect ratio at the start of recording or the aspect ratio that is the largest during recording may be used.

Thereafter, the system control unit 1402 sets the management information file V so as to include the created M_VOB_STI.
R_MANGR. Update or create an IFO (step 248). Thus, the system control unit 1402
Inserts the C_PCK containing the control information at the beginning of the VOBU, and updates the management information file containing the V_ATR after the recording ends.

If it is determined in step 242 that valid control information has not been input from the control information input unit 1409 (if not detected by the VBID detection unit 731), the system control unit 1402 proceeds to step 243. The processing of step 244 is executed without going through. As a result, the encoder unit 1404 generates a VOBU without inserting C_PCK at the beginning of the VOBU. In the present embodiment, if the C_PCK is not inserted in the first VOBU of the VOB, the system control unit 1402 sends the C_PCK to all VOBUs in the VOB.
Shall not be inserted.

(3.2.2) Decoder Unit FIG. 25 is a block diagram showing a detailed configuration of the decoder unit 1406 in FIG. As shown in FIG.
06 is a demultiplexer 1702, video buffer 1
703, video decoder 1704, reorder buffer 1
705, switch 1706, audio buffer 170
7, audio decoder 1708, control information output unit 17
09.

The demultiplexer 1702 receives the VOB from the track buffer 1407 at the time of the reproducing operation, and transfers the payload (packet) of the pack according to the type of each pack in the VOB to the control information output unit 1709, the video buffer 1703, and the audio buffer 1707. Are stored sequentially. The video decoder 1704 is a video buffer 1
The packet is extracted from the packet 703 and decoded. The packet is taken out by the DTS described in the first packet in the video buffer 1703 (PTS in the case of an audio packet).
This is performed when TS) matches the STC.

The reorder buffer 1705 is a buffer for changing the output order of decoded data from coding order to display order in picture units. The switch 1706 is connected to the video decoder 17
The decoded data is output from the switch 04 and the switch 1706 to the output unit 1405 and the data transfer unit 83 for each picture. This output indicates that the PTS described in the packet is S
This is done when it matches TC.

The audio decoder 1708 takes out a packet from the audio buffer 1707 and decodes it. The packet is fetched by the audio buffer 1707.
This is performed when the PTS described in the first packet in the table matches the STC. The decoding result is immediately output to the output unit 140
5 and the data transfer unit 83. The control information output unit 1709 receives the C_PCK from the demultiplexer 1702.
Is input, and control information (DCI, C
CI, DCI_CCI_SS) to the output unit 1405 and the data transfer unit 83. Since C_PCK is a VOBU head pack, the control information output unit 1709 outputs control information to the output unit 1405 every time a VOBU is decoded.

This control information is input to the VBI signal superimposing section 84 via the output section 1405. The VBI signal superimposing unit 84 multiplexes the VBI data of the analog video signal input from the output unit 1405 according to DCI, CCI, and DCI_CCI_SS input from the output unit 1405 as described above. At this time, the control information is VO
Although input to the VBI signal superimposing unit 84 in BU units,
Once the control information is input, the I signal superposition unit 84 holds the control information until the next control information is input, and multiplexes the VBI data on the VBIs of all the fields according to the held control information.

As described above, according to the optical disc and the optical disc recording / reproducing apparatus of the present embodiment, when the television signal or the video signal is converted into the VOB and recorded on the optical disc, the display control multiplexed on the VBI is performed. Since information and copy control information are inserted as C_PCK for each VOBU, control using display control information and copy control information in recording and reproduction on an optical disk can be realized for each VOBU. Moreover, the system control unit 1
402, the control information is transmitted to the encoder unit 14 each time the VOBU encoding completion notification is received from the encoder unit 1404.
04, and the encoder unit 1404 outputs each VOB
Since only one C_PCK at the beginning of U is inserted, C_PCK
The process of inserting the PCK into the VOBU itself is simple, and the processing load on the encoder unit 1404 is very small.

The aspect ratio set in DCI in the control information is used as follows. For example, when recording a movie program with an aspect ratio of 16: 9 in which a CM program with an aspect ratio of 4: 3 is inserted in the middle, the optical disc recording / reproducing apparatus uses the VBI data to correspond to each other than the CM program in the middle. VOBU has 1 in DCI in the control pack.
The aspect ratio of 6: 9 is applied to each V corresponding to the CM program.
In the OBU, an aspect ratio of 4: 3 is set to DCI in the control pack. Thus, the aspect ratio is stored in each VOBU. When playing the movie program,
In the optical disc recording / reproducing apparatus, the VBI signal superimposing section 84 superimposes VBI data including the aspect ratio on the video signal.

The aspect ratio (particularly, letterbox control information) is used as follows. For example, C to display letterbox at the top of the screen with aspect ratio 16: 9
When recording a movie program to be letterbox-displayed at the center of the screen with an aspect ratio of 16: 9 in which an M program is inserted, the optical disk recording / reproducing apparatus controls the VOBU for each VOBU based on letterbox control information based on VBI data. Since it is inserted inside, the program is switched (from movie to CM, C
The letterbox control in the VOBU corresponding to (M to movie) also changes. At the time of reproduction, the VBI signal superimposing section 84 superimposes VBI data including letterbox control information on the video signal. As described above, since the letterbox control information is stored in each VOBU, the letterbox information can be effectively used even after being recorded on the optical disc.

The subtitle mode set for DCI in the control information is used as follows. For example, when recording a program A with subtitles (within the effective operation line), a program B without subtitles, and a program C with subtitles (outside the effective scanning line), the optical disc recording / reproducing apparatus uses a program to be recorded continuously. A, B, and C are recorded as one VOB, and VOBs corresponding to each program are recorded.
Each subtitle mode is set to U in the control pack. As described above, since the subtitle mode is stored in each VOBU, the subtitle mode corresponding to the program can be effectively used even after being recorded on the optical disc.

The film / camera mode set to DCI in the control information is used as follows. It is assumed that the movie program is filmed and the CM program is photographed by a television camera. Normally, 24 frames (frames) / sec is used for film shooting, whereas 30 frames (60 fields) / sec is used for NTSC television camera shooting. If the video signal is in film mode, 2
The conversion from 4 frames / sec to 30 frames / sec means that 6 frames (12 fields) are interpolated per second.

The film / camera mode is useful for re-encoding an analog video signal or digital video data output from an optical disk recording / reproducing apparatus in another recording apparatus. That is, in the VOBU recorded by the optical disk recording / reproducing apparatus, the film mode is set for the VOBU corresponding to the movie program, and the camera mode is set for the VOBU corresponding to the CM program. When an analog video signal or digital video data is output from the VBI signal superimposing unit 84 or the data transfer unit 83 during the reproduction of the VOB, the other recording device shoots the interpolated 6 frames on a film in the film mode. Thus, re-encoding can be performed separately from the 24 frames, and image quality deterioration due to re-encoding can be reduced. The optical disc and the optical disc recording / reproducing apparatus of the present invention are arranged such that the film / camera mode is set to
It can be provided in OBU units.

Also, the C set in the CCI in the control information
GMS is used as follows. VBID detection unit 731
If the detected VBI data indicates "copy prohibited", the video input is cut off by the switch 82 and the DV
The recording operation by the D recorder 75 stops. As a result, it is possible to protect the copyright by observing the intention of the creator or the owner of the program to prohibit copying on a VOBU basis.

V detected by VBID detection section 731
If the BI data indicates "1st generation copy permitted", the CC
The I generation unit 734 sets “copy prohibited” in the CCI data, and the DVD recorder 75 records on the optical disk.
As a result, the creator or owner of the program can protect the copyright by complying with the intention of "copy once" on a VOBU basis.

If the VBI data detected by the VBID detection unit 731 indicates “copy permitted without restriction”, the CCI generation unit 734 sets “copy permitted without restriction” in the CCI data, and the DVD recorder 75 performs recording on an optical disk. As a result, the intention of the creator or owner of the program to copy without restriction is set in VOB
Can comply with U units.

APST set to CCI in control information
B is used as follows. APS (Analog copy Prote
ction System) is a technique that does not hinder normal reproduction in a television receiver, but causes image quality degradation when recorded by an analog VTR. This prevents copying by an analog VTR and protects copyright. In the optical disc recording / reproducing apparatus, when APS is applied to an analog video signal, APSTB is set in CCI for each VOBU when recording,
At the time of reproduction, the APS is applied to the video signal by the VBI signal superimposing unit 84 in accordance with the APSTB in the CCI. According to this, it is possible to prevent copying by the analog VTR for each VOBU. In this way APS
The TB can protect the copyright for each VOBU in combination with the CGMS. For example, only the beginning of a program can be copied, or only the CM program can be copied.

(4) Modified Example In FIG. 1, the optical disk recording / reproducing apparatus 1 and the television receiver 2 may be an integrated apparatus, for example, the television receiver 2 may have a configuration in which the optical disk recording / reproducing apparatus 1 is built. In the above embodiment, the optical disk recording / reproducing apparatus has been described as a replacement device for a stationary VTR as shown in FIG. 1, but a DVD-RAM drive unit, a video capture board / TV tuner board, and an MP
An information processing device such as a personal computer including an EG encoder / decoder may be used. In that case, a video capture board / TV tuner board is provided with a VBI data demodulation unit 73 and a VBI signal superposition unit 84,
The encoder / decoder may be configured to encode / decode the VOB including the control pack.

The MPEG encoder / decoder does not have to be hardware, and the VEC
The OB may be realized by a program to encode and decode. Further, in the above information processing apparatus,
The VOB including the control pack at the beginning of the VOBU may be recorded and reproduced by executing the recording program for realizing the recording operation and the reproduction program for realizing the reproduction operation described in the above embodiment. In this case, by storing the recording program and the reproduction program in a computer-readable recording medium and executing the program on other similar hardware, the optical disk recording / reproduction device in the above embodiment can be realized.

In the above embodiment, C_PCK is RD
Also called I_PCK (Real time data Information_PCK), besides DCI, CCI, DCI_CCI_SS, the presentation start time of the first video field in the VOBU (presentation start time of the first video fiel)
d in this VOBU in display order), VOBU recording time, creator information (manufacturer's info)
rmation) may be included.

In the optical disc recording / reproducing apparatus 1 in the above embodiment, the high frequency receiving section 71 and the video demodulating section 72 receive the television signal contained in the broadcast wave.
Further, an input unit for inputting an analog video signal (for example, an S-VHS signal) may be provided, and an analog video signal may be output to the buffer 81 and the VBI data demodulation unit 73 instead of the video demodulation unit 72.

In the above embodiment, V_ATR is DC
All the contents of I, CCI, DCI_CCI_SS may be included. In this case, the aspect ratio, subtitle mode, film / camera mode, CGMS, APSTB,
What is necessary is just to provide the application flag corresponding to each item of source information. As a result, the above items can be defined for the V_ATR in VOB units and the control information in the C_PCK in VOBU units. The application flag can indicate which of the items between the V_ATR and the control information should be given priority.

In the above embodiment, M including V_ATR
_VOB_STI can be shared by a plurality of VOBs. The system control unit 1402 executes Step 24 in FIG.
8, the following processing may be performed. That is, the system control unit 1402 compares the M_VOB_STI created in step 247 with another M_VOB_STI already existing in the management information file. , The number of the existing M_VOB_STI is set in the VOBI corresponding to the new recorded VOB. This gives M
_VOB_STI is shared, and an increase in the size of the management information file can be suppressed.

In the above embodiment, since all VOBUs in one VOB include or do not include C_PCK, the VOBU generation in the DVD recorder 75 can be performed uniformly, and the processing load of the recording operation can be increased. It is desirable in that there is little. By the way, one VOB has C_
A VOBU including PCK and a VOBU not including PCK may be mixed. In this case, V including C_PCK
The control information of the OBU includes V which does not include the following C_PCK.
What is necessary is just to make it effective also with respect to OBU. In this case, VOB
This is advantageous in that the amount of data can be reduced.

In the above embodiment, the VBI data demodulating unit 7
3 outputs the control information to the DVD recorder 75 on a field-by-field basis, but after determining the reliability of the control information and whether or not the control information has continued for a predetermined time, the DVD recorder 75 outputs the control information.
May be output. In the above embodiment, the system control unit 1402 determines the most appropriate control information among the control information input from the VBI data demodulation unit 73 as the control information in VOBU units. A plurality of pieces of information are held, and a change point of the content in the held control information is detected, and VOB
The encoder unit 1404 may be controlled so that the start position of U matches the change point.

In the above embodiment, the state of “10b” is not used in the CGMS in the DCI, but may indicate “copy of one generation”.
In this case, the optical disc recording / reproducing apparatus 1 inputs a video signal of a video camera photographed by a user, and uses the input video signal as a video object as a DVD-RA.
When storing in M, any of “copy permitted”, “one generation copy permitted”, and “copy prohibited” may be set according to the user's selection. For example, when a DVD-RAM on which video from a video camera is recorded is used as an original, "copy permitted" or "one generation copy permitted" is used. When a recorded DVD-RAM is used as a duplicate, "copy permitted" is used. The user can set a CGMS desired by the user, for example, by setting “prohibition”.

In the above embodiment, the VOB has been described as an example of the M_VOB including the V_PCK, but the S_VOB including the S_PCK on which the still image data is loaded without including the V_PCK is described.
The present invention can be applied to (Still picture_VOB) as well as M_VOB. In this case, S_V
A control pack may be provided for each OB VOBU. Also,
With respect to the four bits (b7 to b4) in FIG. 5, each value other than the first two (0000b and 0001b) is for letterbox control. (Including the part displayed in black)
(For example, 4: 3 or 19: 9).

When a recording stop signal is output in step 174 of FIG. 17, the DVD recorder 75 may completely stop the subsequent recording operation and shift to an idle state (waiting for a user's operation input). (Industrial applicability) The optical disc recording / reproducing apparatus of the present invention, when recording a video object on an optical disc,
Information indicating display control and copy control is recorded for each video object unit having a reproduction time of 1 second or less,
When reproducing a video object on an optical disk, display control and copy control are performed according to information indicating display control and copy control. Therefore, the present invention is suitable for an optical disc recording / reproducing apparatus that records an input video signal as a video object on an optical disc and reproduces the recorded video object.

[0117]

The optical disk of the present invention is a recordable optical disk on which a video object is recorded. The video object includes one or more video object units, and each video object unit includes control information and video data. Has a playback time of 1 second or less, and the control information indicates at least one of display control and copy control for a video object unit including the control information.

The optical disk recording apparatus of the present invention reduces the reproduction time of one second or less by extracting the additional data indicating at least one of the display control and the copy control from the video / audio signal and encoding the video / audio signal. Encoding means for generating a video object comprising a video object unit having the same; and generating means for generating control information indicating at least one of display control and copy control for each video object unit based on the additional data extracted by the extraction means. And control means for controlling the encoding means so as to insert the control information generated by the generation means into each video object unit.

An optical disk reproducing apparatus according to the present invention is a reproducing apparatus for reproducing a video object recorded on an optical disk. The optical disk reproducing apparatus reads out a video object from the optical disk, and outputs video data, Separating means for separating audio data and control information, decoding means for generating a video and audio signal by decoding the separated video data and audio data, and a vertical blanking period of the video and audio signal corresponding to the video object unit. Multiplexing means for multiplexing the additional data based on the control information separated from the video object unit.

Here, the control information indicates the data content multiplexed in the vertical blanking interval of the analog video signal, and at least one of the display position, the copy management condition, and the material type for the video object unit including the control information. May be configured. According to this configuration, since each video object unit contains control information, display control and copy control are dynamically performed in units of VOBUs, that is, units shorter than 1 second, which is sufficiently short for a viewer, during reproduction by the optical disk reproducing apparatus. There is an effect that can be changed to. For example, the display mode and copying permission / prohibition can be changed in a partial period of a program (such as a CM program).

Here, each video object unit may include one control pack and a video pack including video data, and the control pack may be arranged at the head of each video object unit and include the control information. According to this configuration, since each video object unit has a control pack at the head, it is necessary to generate a control pack for each video object unit in the optical disc recording apparatus and to record the generated control pack at the head of the video object unit. There is an effect that the processing load can be reduced.

Here, the control information may further include status information indicating whether or not the content is valid. According to this configuration, since the control information includes the status information, a video object unit in which information relating to display control and copy control is valid and an invalid video object unit can be mixed in a video object.

Here, the control information may include letterbox information indicating the video display position on the screen for the video object unit including the control information. According to this configuration, it is possible to cause the optical disk playback device that plays back the video object to dynamically perform letterbox control in VOBU units, that is, in units of 1 second or less.

Here, the control information may be configured to indicate the aspect ratio of the video of the video object unit including the control information. According to this configuration, the aspect ratio of the video object can be set in the control information in VOBU units. Here, the control information may be configured to include caption mode information indicating a display position of a caption for a video object unit including the control information.

According to this configuration, in the optical disc reproducing apparatus for reproducing the video object, the display position of the subtitle can be dynamically controlled in VOBU units. Here, the control information may be configured to include film / camera mode information indicating whether the video of the material is shot by a television camera or a movie film for the video object unit including the control information.

According to this configuration, the film / camera mode of the video object can be set in the control information for each VOBU. Here, the control information may be configured to include generation-based copy management information indicating whether copying to another medium is prohibited or permitted for the video object unit including the control information.

According to this configuration, generation-specific copy management information of a video object can be set as control information in VOBU units. Here, the control information may be configured to include analog protection information indicating the type of the copy protection method applied to the analog video signal used as the material of the video object unit for the video object unit including the control information.

According to this configuration, analog copy protection information of a video object can be set as control information in VOBU units. Here, the control information is
For the video object unit that contains it,
The configuration may include source information indicating whether or not the material of the video object unit is an analog prerecorded medium.

According to this configuration, the source information of the video object can be set in the control information for each VOBU. Here, in the optical disc, in addition to the video object including the control information, a video object not including the control information and at least one stream information are recorded.
One-to-one or many-to-one correspondence, and stream information includes aspect ratio information indicating an aspect ratio of a video object;
An application flag may be included, and the application flag may indicate (a) or (b).

(A) The corresponding VOB is encoded with the aspect ratio indicated by the aspect ratio information. (B) The corresponding VOB is not always encoded at the aspect ratio indicated by the aspect ratio information, and the aspect ratio recorded in the control pack has priority. According to this configuration, if the application flag is (a), the optical disk reproducing device determines the aspect ratio of the video object without reading the video object from the stream information recorded separately from the video object. Can be. Further, it is possible to determine which of the aspect ratio information in video object units and the aspect ratio in video object units should be given priority based on the value of the application flag. For a video object having no control information, the size of the video object can be reduced by the control information.

[Brief description of the drawings]

FIG. 1 is a diagram showing the appearance of an optical disk recording / reproducing apparatus, a television receiver, and a remote controller.

FIG. 2 is a diagram showing a lead-in area, a data area, and a lead-out area provided in an area of an optical disc, and an outline of a file configuration recorded in the data area.

FIG. 3 shows VR_MOVIE. FIG. 4 is a diagram illustrating a data configuration of a VRO file.

FIG. 4 is a diagram showing a data structure of C_PCK.

FIG. 5 is a diagram illustrating a detailed bit configuration of DCI in C_PCK.

FIG. 6 is a diagram illustrating a relationship between a television screen size and a video size.

FIG. 7 is a diagram illustrating a detailed bit configuration of CCI in C_PCK.

FIG. 8 shows status information DCI_CCI in a control pack.
It is a figure which shows the bit structure of _SS.

FIG. 9A shows a management information file VR_M shown in FIG.
ANGR. FIG. 3 is a diagram hierarchically showing a data structure of an IFO. FIG. 3B is a diagram illustrating a bit configuration of V_ATR.

FIG. 10 is a block diagram showing a configuration of the optical disc recording / reproducing apparatus shown in FIG.

FIG. 11 is a block diagram illustrating a detailed configuration of a VBI data demodulation unit.

FIG. 12 is a flowchart illustrating a detailed generation process of a DCI generation unit.

FIG. 13 is a diagram showing an NTSC aspect ratio conversion table.

FIG. 14 is a diagram showing a PALplus aspect ratio conversion table.

FIG. 15 is a diagram showing a film / camera mode conversion table.

FIG. 16 is a diagram showing a caption mode conversion table.

FIG. 17 is a flowchart illustrating a detailed generation process of a CCI generation unit.

FIG. 18 is a diagram showing a CGMS conversion table.

FIG. 19 is a diagram showing an APSTB conversion table.

FIG. 20 is a diagram showing a source information conversion table.

FIG. 21 is a block diagram illustrating a detailed configuration of a DVD recorder.

FIG. 22 is a block diagram illustrating a detailed configuration of an encoder unit.

FIG. 23 is a block diagram illustrating a detailed configuration of a system encoder.

FIG. 24 is a flowchart showing encoding control in a system control unit 1402 during a recording operation.

FIG. 25 is a block diagram illustrating a detailed configuration of a decoder unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical disk recording / reproducing apparatus 2 Television receiver 71 High frequency receiving part 72 Video demodulation part 73 VBI data demodulation part 75 DVD recorder 81 Buffer 82 Switch 83 Data transfer part 84 VBI signal superposition part 731 VBID detection part 732 DCI generation part 733 MV detection Unit 734 CCI generation unit 1401 U / I unit 1401 user interface unit 1402 system control unit 1403 video / audio input unit 1404 encoder unit 1405 output unit 1406 decoder unit 1407 track buffer 1408 drive 1409 control information input unit 1501 video encoder 1502 video encode buffer 1503 audio encoder 1504 audio encode buffer 1505 control information buffer 1506 STC section 1507 en Coder control unit 1508 system encoder 1601 virtual playback time counting unit 1602 video packing unit 1603 virtual decoder buffer 1604 audio packing unit 1605 virtual decoder buffer 1606 PCK packing unit 1607 interleave unit 1702 demultiplexer 1703 video buffer 1704 video decoder 1705 Reorder buffer 1706 Switch 1707 Audio buffer 1708 Audio decoder 1709 Control information output unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H04N 7/081 (72) Inventor Kaoru Murase 1006 Odakadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72 Inventor: Tomoyuki Okada 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (11)

[Claims] 1. A recordable optical disc on which a video object is recorded, wherein the video object includes one or more video object units, each video object unit includes control information and video data, and the control information includes: The optical disc further includes information indicating an aspect ratio of the video object unit including the control information and status information indicating whether or not the content is valid. The optical disc further includes one-to-one or many-to-one correspondence with the video object. At least one stream information associated with 1 is recorded, wherein the stream information includes aspect ratio information indicating an aspect ratio of a video object and an application flag, and the application flag indicates (a) or (b). (A) the corresponding video object The video object is encoded at the aspect ratio indicated by the aspect ratio information. (B) The corresponding video object is not necessarily encoded at the aspect ratio indicated by the aspect ratio information. An optical disk characterized by priority. 2. The optical disc stores a video object that does not include control information in addition to the video object that includes control information. The stream information includes control information in addition to the video object that includes control information. 2. The optical disc according to claim 1, wherein the optical disc is associated with a video object that does not include the video object. 3. An optical disc recording apparatus for recording a video object including a video object unit on an optical disc, comprising: extraction means for extracting, from a signal including a video signal, additional data indicating at least one of display control and copy control. Encoding information for generating video data by encoding a video signal; and control information including information indicating an aspect ratio and status information indicating whether or not the content is valid based on the extracted additional data. Control object generating means for generating a video object unit including the generated control information and the generated video data; and one-to-one or many-to-one correspondence with the video object. Stream information for generating at least one piece of stream information Generating means, wherein the stream information includes aspect ratio information indicating an aspect ratio of a video object and an application flag, and the application flag indicates (a) or (b). (A) The corresponding video object is (B) The corresponding video object encoded by the aspect ratio indicated by the aspect ratio information is not necessarily encoded by the aspect ratio indicated by the aspect ratio information. The aspect ratio recorded in the control information has priority. An optical disk recording device characterized by the above-mentioned. 4. A video object not containing control information is recorded on the optical disc in addition to the video object containing control information, and the stream information contains control information in addition to the video object containing control information. 4. The optical disc recording apparatus according to claim 3, wherein the optical disc recording apparatus is associated with a video object that does not include the video object. 5. An optical disc recording method for recording a video object including a video object unit on an optical disc, comprising: extracting an additional data indicating at least one of display control and copy control from a signal including a video signal; An encoding step of generating video data by encoding a video signal; and control information including information indicating an aspect ratio and status information indicating whether or not the content is valid based on the extracted additional data. Generating a video object unit including the generated control information and the generated video data; and making a one-to-one or many-to-one correspondence with the video object. Generate at least one stream information The stream information includes aspect ratio information indicating an aspect ratio of a video object and an application flag, and the application flag indicates (a) or (b). The video object is encoded at the aspect ratio indicated by the aspect ratio information. (B) The corresponding video object is not necessarily encoded at the aspect ratio indicated by the aspect ratio information. An optical disc recording method, wherein 6. A video object not containing control information is recorded on the optical disc in addition to the video object containing control information, and the stream information contains control information in addition to the video object containing control information. 6. The optical disk recording method according to claim 5, wherein a video object not included is also associated. 7. An optical disk recording apparatus for recording the optical disk according to claim 1. 8. A reproducing apparatus for reproducing a video object recorded on an optical disc, wherein the video object includes one or more video object units, each video object unit includes control information and video data, Includes information indicating an aspect ratio of a video object unit including the control information and status information indicating whether or not the content is valid. The optical disc further includes one-to-one or one-to-one correspondence with the video object. At least one stream information associated in a many-to-one correspondence is recorded, wherein the stream information includes aspect ratio information indicating an aspect ratio of a video object and an application flag, and the application flag is (a) or (b). (A) the corresponding bidet The object is encoded at the aspect ratio indicated by the aspect ratio information. (B) The corresponding video object is not necessarily encoded at the aspect ratio indicated by the aspect ratio information. The reproducing device having priority is a reading unit that reads a video object from an optical disk, a separating unit that separates the control information and the video data for each read video object unit, and decodes the separated video data. Decoding means for generating a video signal, and information indicating an aspect ratio based on the control information separated from the video object unit in a vertical retrace interval of a signal including the video signal corresponding to the video object unit. And additional means for adding. The optical disc playback apparatus. 9. The optical disc stores a video object not including control information in addition to the video object including control information, and the stream information includes control information in addition to the video object including control information. 9. The optical disk reproducing apparatus according to claim 8, wherein the apparatus is associated with a video object that does not include the video object. 10. A reproducing method for reproducing a video object recorded on an optical disc, wherein the video object includes one or more video object units, each video object unit includes control information and video data, Includes information indicating an aspect ratio of a video object unit including the control information and status information indicating whether or not the content is valid. The optical disc further includes one-to-one or one-to-one correspondence with the video object. At least one stream information associated in a many-to-one correspondence is recorded, wherein the stream information includes aspect ratio information indicating an aspect ratio of a video object and an application flag, and the application flag is (a) or (b). (A) the corresponding video The object is encoded at the aspect ratio indicated by the aspect ratio information. (B) The corresponding video object is not necessarily encoded at the aspect ratio indicated by the aspect ratio information. The reading method of reading a video object from an optical disc; a separating step of separating the control information and the video data for each read video object unit; and a decoding of the separated video data. Decoding a video signal by generating a video signal, and information indicating an aspect ratio based on the control information separated from the video object unit in a vertical retrace interval of the signal including the video signal corresponding to the video object unit. And an adding step of adding Optical disk reproducing method, characterized in that. 11. A video object not containing control information is recorded on the optical disc in addition to the video object containing control information, and the stream information contains control information in addition to the video object containing control information. 11. The optical disk reproducing method according to claim 10, wherein a video object not included is also associated.