JP2002367341A - Information recording medium and device for recording and reproducing information to and from information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems with the conventional DVD-RAM that the time map information within video object management information is recorded in the form of being rearranged to one within a management information file but when the DVD-RAM is made larger in capacity, the size of the management information files including the time map information to be read at a time increases and the memory capacity of always the large size is eventually requested for recording and reproducing devices. SOLUTION: The information recording medium which is capable of forming the time map information by each of PIDs in digital broadcasting and recording the time map information as plural files or plural tables, the recording device and the reproducing device are provided. Further, even when the PIDs are changed during the program, the link information of a time map is formed and recorded in order to deal with such case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a readable and writable information recording medium, and more particularly to an information recording medium on which multimedia data including various formats such as moving picture data, still picture data and audio data is recorded. Regarding the medium. Furthermore, the present invention relates to an apparatus and a method for recording and reproducing information on and from such an information recording medium.

[0002]

2. Description of the Related Art In the field of rewritable optical disks, the upper limit of which is about 650 MB, a phase change disk DVD-RAM having a capacity of several GB has appeared. Along with the practical use of MPEG (MPEG2), which is a coding standard for digital AV data, DVD-RAM is expected as a recording / playback medium not only for computers but also in the audio / video (AV) technology field. A major challenge in the future is how to record AV data including image data using these optical disks aiming at increasing the capacity and to realize performance and new functions that greatly exceed conventional AV devices. In addition, AV equipment is more
Another challenge is to reduce the amount of memory mounted and to realize functions that are easy to use and understand for general users who are not familiar with computer technology.

[0003] In a conventional DVD-RAM, the playback time of a video object and the DVD-R in the video object management information for the recorded video object are stored.
The time map information for associating the physical addresses on the AM is recorded together in the management information file. However, when the capacity of the DVD-RAM is increased, the size of the management information file including the time map information to be read at one time increases in the conventional method, and a large storage capacity is always required for the recording and reproducing apparatus. Will be.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to create time map information for each PID in digital broadcasting and store the time map information in a plurality of files. Or an information recording medium that can be recorded as a plurality of tables. In addition, while recording a program,
Provided is an information recording medium capable of coping with a change in ID. Another object of the present invention is to provide an apparatus for recording and reproducing data on and from such an information recording medium.

[0005]

An information recording medium according to the present invention is an information recording medium for recording a video object and management information for managing reproduction of the video object, and relates to reproduction of the recorded video object. The time map information that associates the time information with the physical address of the video object on the information recording medium is stored in a PID (Packet) in digital broadcast.
IDentifier), and is recorded as a part of the management information.

[0006] In the information recording medium of the present invention, the time map information is a direct table of time information relating to reproduction of the video object and a physical address of the video object on the information recording medium. May be characterized.

Further, in the information recording medium of the present invention, the time map information indirectly represents time information on reproduction of the video object and a physical address of the video object on the information recording medium by using a plurality of tables. It may be characterized by being associated.

In the information recording medium of the present invention, when the PID is changed during the program, the time map information is recorded as separate time map information according to the PID, and the time map information for the program is put together. And generating link information for recording the link information.

[0009] Further, a recording apparatus of the present invention is a recording apparatus for recording information on the information recording medium, comprising: means for generating the video object;
Means for generating video object management information including the time map information for each ID; means for recording the generated video object; and means for recording the generated video object management information. I do.

In the recording apparatus according to the present invention, the time map information to be recorded includes time information relating to reproduction of the video object and a physical address of the video object on the information recording medium in a single table. It may be characterized by being directly associated.

In the recording apparatus according to the present invention, the time map information to be recorded includes time information relating to reproduction of the video object and a physical address of the video object on the information recording medium, which is indirectly represented by a plurality of tables. It may be characterized in that they are associated with each other.

In the recording apparatus according to the present invention, when the PID is changed during the program, the time map information to be recorded is recorded as separate time map information according to the PID. And a means for generating link information for collecting the link information and recording the link information.

[0013] Further, a reproducing apparatus of the present invention is a reproducing apparatus for reproducing the information recording medium, wherein a reading means for reading the video object management information including the time map information;
D reading means for reading the video object based on the video object management information including the time map information for each D, and means for reproducing the read video object based on the read video object management information And characterized in that:

In the playback apparatus of the present invention, the time map information to be played back includes time information relating to playback of the video object and a physical address of the video object on the information recording medium in a single table. It may be characterized by being directly associated.

In the playback apparatus of the present invention, the time map information to be played back includes time information relating to playback of the video object and a physical address of the video object on the information recording medium indirectly by a plurality of tables. It may be characterized in that they are associated with each other.

In the reproducing apparatus according to the present invention, when the time map information to be reproduced is a program whose PID is changed in the middle of the program and is recorded as different time map information according to the PID, the time map information for the program is Reading means for reading the link information for summarizing, reading means for reading time map information for each PID based on the read link information, and reading for reading the video object based on the read time map information for each PID And a means for reproducing the video object read based on the read time map information for each PID.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a DVD disk, a DVD recorder and a DVD player which are embodiments of an information recording medium, a recording apparatus and a reproducing apparatus according to the present invention will be described in the following order with reference to the accompanying drawings. In particular, the points of the invention are “8. Summary of the invention” and “9.
This will be explained. Note that the degree of relevance is different, but all are embodiments of the present invention.

[0018] 1. 1. System outline of DVD recorder device 2. Overview of functions of DVD recorder device Overview of DVD Disc 4. Outline of AV information to be reproduced 5. Overview of management information and playback control of AV information 6. Basic operation of playback function 7. Basic operation of recording function Summary of the Invention Detailed Embodiment (1. System Overview of DVD Recorder) FIG.
FIG. 3 is a diagram illustrating an example of an external appearance of a VD recorder device and an interface between related devices. As shown in FIG.
The recorder is loaded with a DVD, which is an optical disk, and records and reproduces video information. The operation is generally performed with a remote control. Video information input to a DVD recorder includes both analog signals and digital signals. Analog signals include analog broadcasts and digital signals include digital broadcasts.

Generally, analog broadcasting is built in a television apparatus, received and demodulated by a receiver,
The digital broadcast is input to a DVD recorder as an analog video signal such as an STB (Set T
The signal is demodulated into a digital signal by an “Op Box” and input to a DVD recorder for recording.

On the other hand, a DVD disk on which video information is recorded is reproduced by a DVD recorder and output to the outside. As with the input, there are both analog and digital signals as well as the input. If the signal is an analog signal, it is directly input to the television device.
After being converted into an analog signal, it is input to a television device and displayed on the television device.

On a DVD disk, video information may be recorded and reproduced by a DVD camcorder other than the DVD recorder or a personal computer. Even if it is a DVD disc on which video information is recorded outside the DVD recorder, the DVD recorder reproduces the DVD disc when it is loaded on the DVD recorder.

It should be noted that audio information is usually attached to the video information of analog broadcasting and digital broadcasting described above. The accompanying audio information is similarly recorded and reproduced by the DVD recorder. The video information is generally a moving image, but may be a still image. For example, this is the case when a still image is recorded by the photograph function of a DVD camcorder. Note that STB
Digital I / F between DVD and DVD recorder is IEEE13
94, ATAPI, SCSI, etc.

Although the example between the DVD recorder and the television apparatus is NTSC, which is a composite video signal, a component signal for separately transmitting a luminance signal and a color difference signal may be used. Further, as for a video transmission I / F between an AV device and a television device, research and development to replace an analog I / F with a digital I / F, for example, a DVI, is being promoted, and a DVD recorder and a television device have a digital I / F. / F is naturally expected to be connected.

(2. Outline of Functions of DVD Recorder) FIG. 2 is a block diagram showing functions of the DVD recorder. The drive device includes an optical pickup 101 for reading data from the DVD-RAM disk 100 and an ECC (Er).
rr Correcting Code) Processing Unit 10
2, 10 to track buffer 103, track buffer
3 includes a switch 104 for switching input and output, an encoder unit 105, and a decoder unit 106. As shown in the figure, one sector = 2 in the DVD-RAM disc 100.
Data is recorded with KB as the minimum unit. Also, 1
Assuming that 6 sectors = 1 ECC block, the ECC processing unit 102 performs an error correction process on an ECC block basis.

The DVD recorder may include a semiconductor memory card or a hard disk drive as a data storage medium in addition to a DVD disk. FIG.
2 shows a block diagram of a DVD recorder provided with a semiconductor memory card and a hard disk drive. One sector may be 512B, 8KB, or the like. The ECC block also has one sector, 16 sectors, and 3 sectors.
Two sectors or the like may be used. It is expected that the sector size and the number of sectors constituting the ECC block will increase as the recordable information capacity increases.

The track buffer 103 is a DVD-RA
A buffer for recording AV data at a variable bit rate (VBR) in order to record AV data on the M disk 100 more efficiently. DVD-RAM disk 1
Since the read / write rate (Va) to 00 is a fixed rate, the bit rate (Vb) of AV data changes according to the complexity of its contents (image in the case of video). Is a buffer for absorbing the difference between

If the track buffer 103 is used more effectively, it is possible to arrange AV data discretely on the disk 100. This will be described with reference to FIG. FIG. 4A is a diagram showing an address space on a disk. As shown in FIG. 4A, the AV data is [a1, a2]
Is recorded separately in the continuous area of [a3, a4] and the continuous area of [a3, a4], the data stored in the track buffer is supplied to the decoder unit 106 while seeking from a2 to a3. Continuous reproduction of data becomes possible. FIG. 4B shows the state at this time.

The AV data whose reading has been started at the position a1 is input to the track buffer 103 at time t1, and the output of data from the track buffer 103 is started. As a result, the input rate (Va) to the track buffer and the output rate (V
Data is accumulated in the track buffer by the rate difference (Va-Vb) of b). This state continues until the search area reaches a2, that is, until time t2. Assuming that the amount of data accumulated in the track buffer 103 during this time is B (t2), B (t2) accumulated in the track buffer 103 from time t2 to time t3 when reading of data in the area a3 starts. May be continued to be supplied to the decoder 106.

In other words, if the data amount ([a1, a2]) to be read before the seek is at least a predetermined amount, continuous supply of AV data is possible even when a seek occurs. The size of the continuous area in which AV data can be continuously supplied is expressed by the following equation when converted into the number of ECC blocks (N_ecc). In the formula, N_sec is ECC
S_size is the sector size, and Tj is the seek performance (maximum seek time).

N_ecc = Vb * Tj / ((N_s
ec * 8 * S_size) * (1−Vb / Va)) Further, a defective sector may be generated in the continuous area. Considering this case, the continuous area is represented by the following equation. In the formula, dN_ecc is the size of the defective sector to be accepted, and Ts is the time required to skip the defective sector in the continuous area. This size is also represented by the number of ECC blocks.

N_ecc = dN_ecc + Vb *
(Tj + Ts) / ((N_sec * 8 * S_size)
* (1-Vb / Va)) Here, an example in which data is read from the DVD-RAM, that is, the case of reproduction is described.
The same can be considered in the case of writing data to the memory, that is, in the case of recording. As described above, in the DVD-RAM, as long as data of a certain amount or more is continuously recorded, continuous reproduction / recording is possible even if AV data is recorded on a disk in a distributed manner. In DVD, this continuous area is called CDA.

(3. Outline of DVD Disc) FIG. 5 is a diagram showing the appearance and physical structure of a DVD-RAM disc which is a recordable optical disc. DVD-RAM
Is generally loaded into a DVD recorder while being housed in a cartridge. The purpose is to protect the recording surface. However, if the recording surface is protected by another configuration, or if it is acceptable, it may of course be arranged so that the recording surface can be directly loaded into the DVD recorder without being housed in the cartridge. DV
The D-RAM disk records data by a phase change method. Data recorded on the disk is managed in sector units,
Access address is attached. The 16 sectors serve as an error correction unit, are provided with an error correction code, and
It is called a C block.

FIG. 5A is a diagram showing a recording area of a DVD-RAM disc which is a recordable optical disc. As shown in the figure, the DVD-RAM disk has a lead-in area at the innermost circumference, a lead-out area at the outermost circumference, and a data area between them. The lead-in area is
A reference signal necessary for stabilizing the servo at the time of access of the optical pickup, an identification signal with another medium, and the like are recorded. The same reference signal as the lead-in area is recorded in the lead-out area. The data area is
It is divided into sectors (2048 bytes), which is the minimum access unit. In addition, DVD-RAM has a Z-CLV (ZoneConstantan) during recording / reproduction.
In order to realize rotation control called “t Linear Velocity”, the data area is divided into a plurality of zone areas.

FIG. 5A is a diagram showing a plurality of zone areas provided concentrically on a DVD-RAM. As shown in FIG.
It is divided into four zone areas. The rotational angular velocity of the DVD-RAM is set for each zone area so as to become faster in the zone on the inner peripheral side, and is kept constant while the optical pickup accesses in one zone. With this, DVD
-The recording density of the RAM is increased, and the rotation control during recording / reproduction is facilitated.

FIG. 5B is an explanatory view in which a lead-in area, a lead-out area, and zone areas 0 to 23 shown concentrically in FIG. 5A are arranged in the horizontal direction. The lead-in area and the lead-out area include a defect management area (DMA: Defect Management) therein.
Area). The defect management area refers to an area in which position information indicating the position of a sector in which a defect has occurred and alternative position information indicating in which of the above-mentioned alternative areas a sector replacing the defective sector exists are recorded. .

Each zone area has a user area inside thereof, and has an alternative area and an unused area at the boundary. The user area refers to an area that can be used as a recording area by the file system. The replacement area is an area used when a defective sector exists.
The unused area is an area that is not used for data recording.
An unused area is provided for about two tracks. The unused area is provided because the sector address is recorded at the same position on an adjacent track in the zone, but the ZC
In the LV, since the recording position of the sector address is different in the track adjacent to the zone boundary, it is to prevent the sector address from being erroneously determined.

As described above, there are sectors not used for data recording at the zone boundaries. For this reason, the DVD-R is designed to continuously show only the sectors used for data recording.
AM is a logical sector number (LSN: Log) in order from the inner circumference.
ical Sector Number) is assigned to a physical sector in the user area.

FIG. 6 shows a DV composed of logical sectors.
2 shows a logical data space of a D-RAM. The logical data space is called a volume space and records user data. The volume area manages recording data by a file system. That is, volume structure information for managing a group of sectors for storing data as a file and a group of files as a directory is recorded at the beginning and end of the volume area. The file system according to the present embodiment is called UDF and conforms to the ISO13346 standard.

Note that the above-mentioned group of sectors is not always arranged continuously in the volume space, but is partially arranged discretely. For this reason, the file system manages, as an extent, a group of sectors that are continuously arranged in the volume space among the sector groups that constitute the file, and manages the file as a set of related extents.

FIG. 7 shows the structure of directories and files recorded on the DVD-RAM. Under the route, VI
There is a DEO_RT directory under which files of various objects, which are data for reproduction, and VIDEO as management information indicating their reproduction order and various attributes.
Stores a Manager file. The object is data conforming to the MPEG standard, and includes PS_VOB,
There are TS1_VOB, TS2_VOB, AOB, and POB.

PS_VOB, AOB and POB are MPEG
TS1_VO
B and TS2_VOB are transport streams (T
S). The program stream has a data structure considering storage of AV information in a package medium, while the transport stream has a data structure considering communication media.

PS_VOB, TS1_VOB, TS2_
A VOB is an object that has both video information and audio information and is mainly composed of video information. Of these, TS
1_VOB is an object in which encoding is performed by a DVD recorder and the internal picture structure is managed in detail, and TS2_VOB is an object encoded outside the DVD recorder and has a data structure such as an internal picture structure. Unknown object.

Typically, TS1_VOB is an object in which an analog video signal input from the outside is encoded into a transport stream by a DVD recorder, and TS2_VOB is directly encoded on a disc without encoding a digital video signal input from the outside. The recorded object. AOB and POB are MPEG program streams, AOB is an object mainly composed of audio information, and POB is an object mainly composed of still images.

The above-mentioned subject of video information and subject of audio information means that the bit rate is allocated to a large amount.
VOB is used for applications such as movies, and AOB
Is used for music applications.

(4. Outline of AV Information to be Reproduced) FIG.
FIG. 1 is a diagram showing the structure of MPEG data recorded as various AV objects on a DVD disk. As shown in FIG. 8, the video stream and the audio stream are respectively divided and multiplexed. In the MPEG standard, a stream after multiplexing is called a system stream. In the case of a DVD, a system stream in which DVD-specific information is set is stored in a VOB (Video Object).
t). The unit of division is called a packed packet, and has a data amount of about 2 KB.

The video stream is coded according to the MPEG standard, is compressed at a variable bit rate, and has a high bit rate for a complex video such as a fast moving one. According to the MPEG standard, each picture of a video is
The pictures are coded by classifying them into pictures, P pictures, and B pictures. Of these, the I picture has been subjected to spatial compression encoding completed within the frame, and the P picture, B picture
The picture is temporally compressed and coded using the correlation between frames. In MPEG, a section including at least an I picture is defined as a GOP (Group of Picture).
re). The GOP becomes an access point in trick play such as fast-forward play. This is because it has an I-picture compressed in a frame.

On the other hand, for encoding an audio stream, DV
In the case of D, encoding of AC3 and LPCM is used in addition to AAC and MP3 which are MPEG audio. As shown in FIG. 8, the multiplexed data unit including the video information constituting the GOP and the accompanying audio information is VOBU.
(Video Object Unit).
The VOBU may include information for managing the moving image section as header information.

The system stream described with reference to FIG.
There are a program stream (PS) and a transport stream (TS). The former has a data structure considering a package medium, and the latter has a data structure considering a communication medium.

FIG. 9 is a diagram for explaining the outline of the data structures of the program stream and the transport stream. The program stream is composed of fixed-length packs, which are the minimum units for transmission and multiplexing.
It has more than one packet. Both the pack and the packet have a header section and a data section. In MPEG, the data part is called a payload. In the case of DVD, the fixed length of the pack is 2 KB in conformity with the sector size. A pack can have a plurality of packets, but a pack that stores DVD video and audio has only one packet, so that one pack = 1 packet except in special cases.

On the other hand, the unit of transmission and multiplexing of the transport stream is composed of fixed-length TS packets. TS
The size of the packet is 188B, which is compatible with ATM transmission, which is a communication standard. TS packet is 1
One or more collectively constitute a PES packet. The PES packet is a concept common to the program stream and the transport stream, and has a common data structure. The packet stored in the pack of the program stream is P
An ES packet is directly formed, and one or more TS packets of a transport stream are collected to form a PES packet.

The PES packet is a minimum unit of encoding, and stores video information and audio information which are commonly encoded. That is, video information and audio information of different encoding systems are not mixedly stored in one PES packet. However, picture boundaries and audio frame boundaries need not be guaranteed for the same encoding method. As shown in FIG.
One I picture is stored in an S packet,
A plurality of picture data may be stored in the ES packet.

FIGS. 10 and 11 show the individual data structures of the transport stream and the program stream. As shown in FIGS. 10 and 12, the TS packet is
It comprises an S packet header, an application field, and a payload part. The PID (Pa) is included in the TS packet header.
Identifier) is stored, whereby various streams such as a video stream or an audio stream to which the TS packet belongs are identified.

The application field contains a PCR (Program).
m Clock Reference) is stored.
PCR is a reference value of the reference clock (STC) of the device that decodes the stream. The device typically demultiplexes the system stream at the timing of PCR and reconstructs it into various streams such as a video stream.

In the PES header, DTS (Decodi)
ng Time Stamp) and PTS (Presen)
station time stamp) is stored.
DTS indicates the decoding timing of the picture / audio frame stored in the PES packet, and PTS
Indicates presentation timing such as video / audio output. Note that PTS, DT are included in all PES packet headers.
It is not necessary to have S, and if PTS and DTS are included in the header of the PES packet in which the start data of the I picture starts to be stored, there is no problem in decoding and output.

The details of the structure of the TS packet are shown in FIG. As shown in FIG.
In addition to the above, a random access display flag is stored, and the flag indicates whether or not data corresponding to the head of a video / audio frame and being an access point is stored in a corresponding payload portion. Further, in addition to the above-described PID, the header part of the TS packet also stores a unit start display flag indicating the start of the PES packet, and applied field control information indicating whether or not an applied field follows.

FIG. 11 shows the structure of a pack constituting a program stream. Pack is SC in pack header
R and StreamID. The SCR is substantially the same as the PCR of the transport stream, and the StreamID is substantially the same as the PID. Since the data structure of the PES packet is common to the transport stream, PTS and DTS are stored in the PES header.

One of the major differences between the program stream and the transport stream is that a multi-program is allowed in the transport stream. That is,
Although only one program can transmit a program stream in units of programs, the transport stream is assumed to transmit a plurality of programs at the same time. For this reason, in the transport stream, it is necessary for the playback device to identify either a video stream or an audio stream that constitutes a program for each program.

FIG. 13 shows a PAT for transmitting configuration information of an audio stream and a video stream constituting a program.
2 shows a table and a PMAP table. As shown in FIG. 13, the PMAP table stores information on a combination of a video stream and an audio stream used for each program, and the PAT table stores information on a combination of the program and the PMAP table. The playback device is P
A video stream and an audio stream constituting the program requested to be output can be detected from the AT table and the PMAP table.

Next, the arrangement of the above-described packs of the program stream and the TS packets of the transport stream on the disc will be described with reference to FIG.
As shown in FIG. 14A, 16 sectors form an ECC block. A pack (PS Pack) constituting a video object (PS_VOB) in the form of a program stream is arranged at a sector boundary as shown in FIG. This is because both the pack size and the sector size are 2 KB.

On the other hand, a video object in the form of a transport stream (TS1-VOB / TS2-V
OB) is placed in the ECC block in units of 8 KB, called capsules. The capsule has an 18B header area and the data area has A
Forty-three TS packets to which TS information is added are arranged. ATS information (Arrival Time Stam
p Information) is information generated and added by the DVD recorder, and the packet
This is information indicating the timing transmitted from the outside to the D recorder.

(5. Outline of Management Information and Playback Control of AV Information) FIGS. 15 and 16 show the data structure of a file called video management information (Video Manager) shown in FIG. The video management information includes object information indicating management information such as a recording position of various objects on a disc, and reproduction control information indicating a reproduction order of the objects.

FIG. 15 shows PS-VOB # 1 to PS-VOB # n and TS as objects recorded on the disc.
1-VOB # 1 to TS1-VOB # n, TS2-VOB
The case where # 1 to TS2-VOB # n are present is shown. As shown in FIG. 15, depending on the type of these objects, PS
An information table for -VOB, an information table for TS1-VOB, and an information table for TS2-VOB exist individually, and each information table has VOB information for each object.

The VOB information includes general information of the corresponding object, attribute information of the object, a time map for converting the reproduction time of the object into an address on the disk, and management information of the time map. I have. The general information includes identification information of the corresponding object, the recording time of the object, and the like. The attribute information includes video stream information (V_ATR) including the coding mode of the video stream, the number of audio streams (AST_Ns), And audio stream information (A_ATR) including a coding mode of the audio stream.

A time map is required for two reasons. The first is to prevent the reproduction path information from directly referring to the recording position of the object on the disk by a sector address or the like, and to be able to indirectly refer to the reproduction time of the object. In the case of a RAM medium, the recording position of the object may be changed by editing or the like. However, if the reproduction path information directly refers to the recording position of the object by a sector address or the like, the reproduction path information to be updated This is because the number increases. On the other hand, if the reproduction time is indirectly referred to, the reproduction path information need not be updated, and only the time map needs to be updated.

The second reason is that an AV stream generally has two standards, a time axis and a data (bit string) axis, and there is no perfect correlation between these two standards. For example, M which is an international standard for video streams
In the case of PEG-2 video, the use of a variable bit rate (a method of changing the bit rate according to the complexity of image quality) is becoming mainstream, and in this case, the proportionality between the amount of data from the head and the playback time is increasing. Since there is no relationship, random access based on the time axis cannot be performed. In order to solve this problem, the object information has a time map for performing conversion between a time axis and a data (bit string) axis.

As shown in FIG. 15, the reproduction control information has a user-defined reproduction path information table, an original reproduction path information table, and a title search pointer.

As shown in FIG. 16, the playback path includes the DV
There are two types: original definition reproduction path information that is automatically generated so that the D recorder indicates all objects recorded at the time of object recording, and user-defined reproduction path information that allows a user to freely define a reproduction sequence. The playback path is PGC information (Program Chain) for DVD.
Information).
The user-defined reproduction path information is called U-PGC information, and the original reproduction path information is called O-PGC information. O-PG
Each of the C information and the U-PGC information is information that lists cell information, which is information indicating a cell that is a reproduction section of the object, in a table format. The playback section of the object indicated by the O-PGC information is the original cell (O-CEL).
L), and the reproduction section of the object indicated by the U-PGC information is called a user cell (U-CELL).

The cell indicates the playback section of the object by the playback start time and the playback end time of the object. The playback start time and the playback end time are converted into the actual recording position information of the object on the disk by the time map described above. You.

As shown in FIG. 16B, the cell group indicated by the PGC information constitutes a series of reproduction sequences that are sequentially reproduced according to the entry order of the table.

FIG. 17 shows objects, cells, PGCs,
It is a figure which illustrates the relationship of a time map concretely. FIG.
As shown in FIG. 7, the original PGC information 50 includes at least one piece of cell information 60, 61, 62, 63. The cell information 60... Specifies an object to be reproduced, and
The object type and the playback section of the object are designated. The recording order of the cell information in the PGC information 50 indicates the reproduction order when the object specified by each cell is reproduced.

One piece of cell information 60 includes type information (Type) 60a indicating the type of the object designated by the cell information 60.
And an object ID which is object identification information
(Object ID) 60b and start time information (Start_PTM) 60c in the object on the time axis
And end time information (En) in the object on the time axis.
d_PTM) 60d.

At the time of data reproduction, the cell information 60 in the PCG information 50 is sequentially read, and the object specified by each cell is reproduced for the reproduction section specified by the cell. The time map 80c converts the start time information and the end time information indicated by the cell information into position information of the object on the disk.

The map information described above is generated and recorded together with the recording of the object. In order to generate a map, it is necessary to analyze the picture structure in the data of the object. Specifically, it is necessary to detect the position of the I picture shown in FIG. 9 and to detect time stamp information such as PTS, which is the reproduction time of the I picture shown in FIGS. 10 and 11.

Here, a problem that occurs when map information of PS-VOB, TS1-VOB, and TS2-VOB is generated will be described below. PS-VOB, TS-VOB1
Is mainly generated by a DVD recorder encoding a received analog broadcast into an MPEG stream as described with reference to FIG. Therefore, the information of the I picture and various time stamps is generated by itself,
The data structure inside the stream is clear to the VD recorder, and there is no problem in generating the map information.

Next, regarding TS2-VOB, as described with reference to FIG.
The D recorder directly records on the disk without encoding. For this reason, unlike the PS-VOB, the position and time stamp information of the I picture are not generated by themselves, so that the data structure inside the stream is not clear for the DVD recorder, and the information is detected from the digital stream to be recorded. Is required.

For this reason, the DVD recorder uses a TS that records a stream encoded outside the recorder.
As for 2-VOB map information, an I picture and a time stamp are detected as follows. First, the detection of the I picture is performed by detecting the random access display information of the application field of the TS packet shown in FIG.
The detection of the time stamp is performed by detecting the PTS of the PES header. For the time stamp, instead of the PTS, use the PCR in the application field.
Alternatively, the ATS, which is the arrival timing at which the TS packet is transmitted to the DVD recorder, may be used instead. In any case, the DVD recorder does not analyze the data structure of the video layer of the MPEG stream, but detects the position of the I picture based on the information of the system layer which is the upper layer. This is because the load on the system is large to perform the analysis of the video layer to generate the map information.

In some cases, it may not be possible to detect the system layer. In this case, since no map information can be generated, it is necessary to indicate that there is no valid map information. In the DVD recorder, these are indicated by the map management information shown in FIG. As shown in FIG. 15B, the map management information has map validity information and a self-encoding flag. The self-encoding flag indicates that the object is an object encoded by the DVD recorder itself, indicates that the internal picture structure is clear, and indicates that the time stamp information of the map information and the position information of the I picture are accurate. The map validity information indicates whether there is a valid time map.

As examples where the system layer cannot be detected, a case where no applicable field is set or a digital stream which is not an MPEG transport stream in the first place can be considered. Since various formats of digital broadcasting can be established in countries around the world, it is naturally expected that DVD recorders record objects for which maps cannot be generated. For example, DV assuming digital broadcasting in Japan
When a D recorder is used in the United States and a digital broadcast in the United States is recorded, there are cases where an object for which a map cannot be generated is recorded.

However, the DVD recorder can also sequentially reproduce the objects for which no map information is generated, from the beginning. In this case, by outputting the recorded digital stream to the STB corresponding to the stream via the digital I / F, the video can be reproduced.

(6. Basic Operation of Playback Function) Next, FIG.
A reproduction operation of a DVD recorder player that reproduces the above-mentioned optical disk using will be described. As shown in FIG. 18, the player has an optical pickup 201 for reading data from the DVD-RAM disc 100, an ECC processing unit 202 for performing error correction and the like on the read data, and temporarily stores the read data after error correction. Track buffer 203 and moving image object (PS_VOB)
Decoder 20 for reproducing a program stream such as
5 and a TS decoder 20 for reproducing a transport stream of a digital broadcast object (TS1_VOB)
6, an audio decoder 207 for reproducing an audio object (AOB), and a still image object (P
OB), a switch 210 for switching data input to each of the decoders 205, 206,..., And a control unit 211 for controlling each part of the player
And

Data recorded on the DVD-RAM disk 100 is read from the optical pickup 201 and passed through the ECC processing unit 202 to the track buffer 20.
3 is stored. The data stored in the track buffer 203 includes a PS decoder 205, a TS decoder 206,
The signal is input to one of the audio decoder 207 and the still image decoder 208, decoded, and output.

At this time, the control unit 211 determines the data to be read based on the reproduction sequence indicated by the reproduction path information (PGC) shown in FIG. That is, in the example of FIG. 16, the control unit 211 transmits the partial section (CELL) of VOB # 1.
# 1) is reproduced first, then a partial section (CELL # 2) of VOB # 3 is reproduced, and finally, VOB # 2 (CELL # 2) is reproduced.
L # 3).

The control unit 211 can acquire the type of the cell to be reproduced, the corresponding object, the reproduction start time of the object, and the reproduction end time based on the cell information of the reproduction path information (PGC) shown in FIG. . The control unit 211 inputs the data of the section of the object specified by the cell information to a suitable decoder. On this occasion,
The control unit 211 specifies an object to be reproduced based on the Object ID of the cell information. Further, the control unit 2
Reference numeral 11 denotes a cell which is a reproduction section of the specified object, by using StartPTM and EndPTM of the cell information.
Is converted to the address of the disc information using the time map of the corresponding VOB information.

The player according to the present embodiment further comprises:
It has a digital interface 204 for supplying an AV stream to the outside. This makes it possible to supply the AV stream to the outside via communication means such as IEEE 1394 or IEC958. This is especially true for TS2-VOBs that have not been encoded by themselves, since there may be no corresponding decoder inside the player, so that the TS2-VOB is directly output to the external STB through the digital interface 204 without decoding. The STB can be played back.

When directly outputting digital data to the outside, the control section 211 determines whether or not random access reproduction is possible based on the map management information shown in FIG.
If the access point information flag is valid, the time map has the position information of the I picture. Therefore, if there is a request for fast-forward playback or the like from an external device, the control unit 211 can output digital data including an I picture to the external device via the digital I / F. If the time access information flag is valid, time access is possible. Therefore, in response to a time access request from an external device, the control unit 211 can output digital data including picture data corresponding to the designated reproduction time to the external device via the digital I / F. .

(7. Basic Operation of Recording Function) Next, FIG.
The configuration and operation of a DVD recorder according to the present invention, which records and reproduces data on and from the optical disk by using a DVD, will be described. As shown in FIG. 19, the DVD recorder displays a message to the user and receives a request from the user.
/ F section 222, a system control section 212 for managing and controlling the entire DVD recorder, an analog broadcast tuner 213 for receiving VHF and UHF, an encoder 214 for converting an analog signal into a digital signal and encoding it into an MPEG program stream, digital satellite broadcasting , A digital broadcast tuner 215, an analyzer 216 for analyzing an MPEG transport stream sent by a digital satellite, a display 217 such as a television and a speaker,
A decoder 218 for decoding the AV stream.

The decoder 218 includes the first and second decoders shown in FIG. Further, the DVD recorder includes a digital I / F section 219, a track buffer 220 for temporarily storing write data, and a DVD-RA
And a drive 221 for writing data to the M disk 100. The digital I / F unit 219 is IEEE1394
This is an interface for outputting data to an external device by communication means such as.

In the DVD recorder thus configured, the user I / F section 222 first receives a request from the user. The user I / F unit 222 transmits a request from the user to the system control unit 212, and the system control unit 212
Interprets the request from the user and makes a processing request to each module. Recording includes self-encoding, which encodes input digital data by itself, and outside encoding, which records encoded digital data on a disk without encoding it.

(7.1 Recording Operation by Self-Encoding) First, for self-encoding recording, the operation of encoding and recording an analog broadcast to PS-VOB will be specifically described below. System control unit 2
12 requests reception to the analog broadcast tuner 213 and encoding to the encoder unit 214. Encoder part 2
Reference numeral 14 video-encodes, audio-encodes, and system-encodes the AV data sent from the analog broadcast tuner 213 and sends it to the track buffer 220.

Immediately after the encoding is started, the encoder 214 sends the time stamp information included in the head data of the MPEG program stream being encoded as the reproduction start time (PS_VOB_V_S_PTM) to the system controller 212, and subsequently creates a time map. Information necessary for this is sent to the system control unit 212 in parallel with the encoding process. This value is set in Start_PTM of the cell information shown later and shown in FIG. The time stamp information is generally PTS, but may be replaced by SCR.

Next, the system control unit 212
21, and the drive 221 extracts the data stored in the track buffer 220 and
The data is recorded on the VD-RAM disk 100. At this time, the above-mentioned continuous area (CDA) is searched from the recordable area on the disc, and data is recorded in the searched continuous area.
The end of recording is instructed by a stop request from the user. The recording stop request from the user is sent to the user I / F unit 22
2 is transmitted to the system control unit 212, and the system control unit 212 issues a stop request to the analog broadcast tuner 213 and the encoder unit 214.

The encoder 214 includes a system control unit 212
In response to the request to stop encoding, the encoding process is stopped, and the time stamp information included in the end data of the MPEG program stream that was finally encoded is sent to the system control unit 212 as the reproduction end time (PS_VOB_V_E_PTM). This value is set in End_PTM of the cell information shown in FIG. PTS is usually set as the time stamp information, but SCR may be used instead.

After the encoding process is completed, the system control section 212 uses the information received from the encoder 214 to generate the PS-VOB VOB information (PS-VOB information) shown in FIG.
VOBI) and playback control information. Here, the generated VOB information includes a time map and map management information suitable for the object type. System control unit 212
Sets the map validity information of the map management information to valid and turns on the self-encoding flag.

As the reproduction control information, an original reproduction path (O-PGC information) shown in FIG. 16 in which the recorded object is one of the reproduction targets is generated. The generated O-PGC information is added to the original reproduction path table. The original reproduction path (O-PGC information) has cell information. The type information of the cell information includes "PS-VO
B ”is set.

Finally, the system control unit 212 requests the drive 221 to end the recording of the data stored in the track buffer 220 and to record the VOB information (PS_VOBI) for PS-VOB and the reproduction control information. The drive 221 stores the remaining data in the track buffer 220 and these information on the DVD-RAM disk 100.
And the recording process ends.

Note that the analog broadcast may be encoded into TS1-VOB. In this case, encoder 2
It is necessary that the encoder 14 converts an analog signal into a digital signal and encodes the digital signal into an MPEG transport stream, and the type information in the cell information is “TS1-
VOB ". Start_PTM in this case
End_PTM may be PTS or PCR.

(7.2 Recording Operation by Outside Encoding) Next, recording by outside encoding will be specifically described through an operation of recording a digital broadcast. In this case, the type of the recorded object is TS2-VOB. The digital broadcast recording request by the user is transmitted to the system control unit 212 through the user I / F unit 222. The system control unit 212 requests reception to the digital broadcast tuner 215 and data analysis to the analysis unit 216.

The MPEG transport stream sent from the digital broadcast tuner 215 is transferred to the track buffer 220 through the analysis unit 216. Analysis unit 21
6 is an encoded MPEG transport stream (TS2-V) received as a digital broadcast first.
As information necessary for generating the VOB information (TS2_VOBI) of the OB), the time stamp information included in the leading data of the transport stream is included in the start time information (TS2_VOBI)
VOB_V_S_PTM) and sends it to the system control unit 212. The start time information is generated in FIG.
7 is set to Start_PTM of the cell information shown in FIG.
This time stamp information becomes PCR or PTS.
Alternatively, ATS, which is the timing at which the object is transmitted to the DVD recorder, may be used instead.

The analysis unit 216 further analyzes the system layer of the MPEG transport stream and detects information necessary for creating a time map. Regarding the position of the I picture in the object, as described above, the application field (adaptation) in the TS packet header is used.
field), the random access indicator (ra
ndam_access_indicator).

Next, the system control unit 212
The drive 221 outputs a recording request to the track buffer 220 and records the data on the DVD-RAM disk 100. At this time, the system control unit 212 instructs the drive 221 on the basis of the allocation information of the file system where to record on the disc. At this time, the above-mentioned continuous area (CDA) is searched from the recordable area on the disc, and data is recorded in the searched continuous area.

The end of recording is instructed by a stop request from the user. The recording stop request from the user is transmitted to the system control unit 212 through the user I / F unit 222, and the system control unit 212
5 and a stop request is sent to the analysis unit 216.

The analysis unit 216 receives the analysis stop request from the system control unit 212, stops the analysis process, and displays the time stamp information included in the data of the end section of the last analyzed MPEG transport stream at the display end time (TS
2_VOB_V_E_PTM) as the system control unit 2
Send to 12. This value corresponds to the End of the cell information shown in FIG.
_PTM is set. This time stamp information is P
CR or PTS. Alternatively, ATS, which is the timing at which the object is transmitted to the DVD recorder, may be used instead.

After the digital broadcast reception processing is completed, the system control unit 212, based on the information received from the analysis unit 216, uses the TS2-VOB VOB information (T
S2_VOBI) and playback control information.

Here, the generated VOB information includes a time map and map management information suitable for the object type. The system control unit 212 sets the map validity information of the map management information to valid when detecting a position or the like of the I picture in the object and generating a valid time map. The self-encoding flag is OFF
Make settings. If a valid time map cannot be generated, the map validity information is invalidated. As a case where an effective time map cannot be generated, a case where an unsupported digital broadcast is received, a case where there is no random access information in an applicable field, and the like are considered.
When directly input from the digital I / F, MP
There may be cases where it is not an EG transport stream,
Also in this case, the map validity information is set to be invalid.

As the reproduction control information, an original reproduction path (O-PGC information) shown in FIG. 16 in which the recorded object is one of the reproduction targets is generated. The generated O-PGC information is added to the original reproduction path table. The original reproduction path (O-PGC information) has cell information. The type information of the cell information includes "TS2-VO
B ”is set.

Lastly, the system control unit 212 requests the drive 221 to end the recording of the data stored in the track buffer 220, and to record the VOB information (TS2_VOBI) for TS2-VOB and the reproduction control information. The drive 221 stores the remaining data in the track buffer 220 and these information on the DVD-RAM disk 100.
And the recording process ends.

The operation has been described based on the recording start and end requests from the user. For example, in the case of timer recording used in a VTR, the system control unit automatically starts recording instead of the user. And an end request are issued, but the operation of the DVD recorder is not essentially different.

(8. Summary of the Invention) The present invention relates to an object recorded on a disc, reproduction time information of the recorded object and physical address on the disc in management information on the object. Digital broadcast PID for time map information to be associated
When recording a broadcast having a different PID by referring to (PID of video stream), the broadcast is recorded in a different file or a different table. Further, even when the PID of the recorded broadcast changes during the recording operation, the time map link information is generated and recorded to manage the time map for one program or one recording operation. It implements a possible data structure.

(9. Detailed Embodiment) Details of the embodiment of the present invention will be described. As shown in FIG. 20A, the time map information is used to convert the reproduction time of the object into the recording address of the object on the disk.
Use multiple tables. In FIG. 20A, the time map information includes general time map information, a time entry, and an object unit entry. The general time map information includes the number of time entries indicating the number of time entries, the number of object units indicating the number of object units, the time offset indicating the time offset from the head of the object unit to the point indicated by time entry # 1, and the disc. An address offset indicating the offset to the head of the first object unit with respect to the point is included.

The time entry indicates an object unit including the time entry at a fixed time (for example, 10 seconds) or at intervals of a fixed number of packets (referred to as a time unit). Time entries include
The object unit entry number indicating the number of the object unit indicated by the time entry, the time difference indicating the time difference between the point indicated by the time entry and the beginning of the object unit including the time entry, and the time from the beginning of the first object unit An object unit address indicating the address up to the head of the object unit including the time entry is included. Further, in the object unit entry, when video data is included in the object unit, the size of the first reference image, the reproduction time of the object unit, and the size of the object unit on the disk are recorded.

[0111] Such time map information is obtained by referring to the PID of a video stream in digital broadcasting,
In the case where D records a different broadcast, it is also necessary to have information for associating the time map information with the PID of the video stream at the start of recording so that it can be generated and recorded as another file or another table. (Figure 2
0 (b)). 20B, the time map management information includes time map management general information having information indicating the number of time map information created for each PID, and time map PID information indicating the PID of the time map information created for each PID. , Have a search pointer to time map information corresponding to each PID.

Here, if the PID is changed during the recording of video data, the time map is recorded as a separate file or a separate table. The link information of the PID-based time map for the video data recorded in (1) to (4) is created and recorded. By using this link information, even if the PID is changed during the program, it is possible to perform the reproduction without putting a burden on the reproduction device.

FIG. 21 shows the data structure of the link information. FIG. 21A shows an example having link information. The link information includes link general information having the number of link information search pointers and the like and a link information search pointer. The search pointer points to the head of a table in which time map PID information of video data recorded in one recording operation is sequentially arranged. As another embodiment, as shown in FIG. 21B, the link information search pointer may point to the head of a table in which addresses where time map information for each PID are recorded are arranged in order.

As shown in FIG. 21C, link information may be provided in the time map information. In this case, the link information indicates the recording address of the time map information corresponding to the video data recorded in one recording operation, when the PID changes during the same recording operation after the PID changes. Here, instead of the recording address,
The PID after the change may be recorded. FIG.
By having the link information shown in (a), FIG. 21 (b), or FIG. 21 (c), it is possible to cope with a case where the PID changes during a single recording operation.

In the present embodiment, the link information is a PID for video data during one recording operation.
Although the description has been made with respect to another time map, link information may be created in units of programs, not in units of one recording operation.

By generating a time map as described above, a time map can be generated and managed for each PID. Here, regarding the reference of the PID,
FIG. 22 (a), FIG.
PMT (Program Map T) shown in FIG.
able), and the Stream_type in the PMT
e (FIG. 22 (c)) and elementary_PID
It is possible to detect the PID of the video stream in the broadcast by examining the contents of.

Next, specific recording and reproducing operations will be described. FIG. 23 is a flowchart showing a series of operations when recording a digital broadcast. In FIG.
When recording is started, the PID of the broadcast is acquired (step 501). Next, it is assumed that the loop from step 502 to step 507 is repeated while the object to be recorded exists. First, a recording object is generated (step 503), and thereafter, object information, time map information, and time map management information are generated (step 504). Thereafter, the object generated in step 503 is recorded (step 505), and in step 506, it is checked whether the PID of the video stream currently being recorded has changed. Here, if there is no change in the PID, the loop is continued, but if there is a change in the PID,
Generate link information (step 510) and continue the loop. When the loop ends, object information, time map information, time map management information, and link information are recorded (step 508), and reproduction path information is generated and recorded (step 509), and the recording operation ends.

FIG. 24 is a flowchart at the time of reproducing the data recorded as shown in FIG. In FIG. 24, first, data to be reproduced is selected (step 6).
01). Next, reproduction path information corresponding to the selected data is read (step 602), and selection of a reproduction path is prompted (step 603). In order to perform reproduction based on the selected reproduction path, a loop from step 604 to step 609 is performed. First, the object information and the time map information for the object to be reproduced are read (step 605), the object to be reproduced is read based on the information (step 606), and the read object is reproduced (step 607). Here, it is determined whether or not the time map information is sufficient (step 608).
If it is not enough, the link information is read (step 61).
0) The loop shall continue. Here, the link information is read when the end of the time map information is reached. However, at the time of step 605, the necessary link information may be read in advance.

In the present embodiment, the address is specified by a plurality of tables such as a time entry and an object unit entry as the configuration of the time map. However, the reproduction time information is converted into the address information using a single table. It does not matter. FIG. 25 shows time map information in this case. FIG. 25A shows the time map information when the PID is a, and is configured in the form of a conversion table to a recording address corresponding to the reproduction time. Here, regarding the increment of the reproduction time, TS
One packet at a time or some other criteria (eg, T
(For example, when the beginning of the MPEG sequence header is included in the S packet, or when a random access indicator is present in the TS packet).

Information for managing such time map information is the time map management information shown in FIG. 25 (b), which is created for each PID and time map management general information having information indicating the number of time map information. A time map PID indicating the PID of the time map information, and each P
It is assumed that a search pointer to time map information corresponding to the ID is provided. At this time, it is assumed that the PID of the recorded object is recorded in the management information in the general information of the object information in FIG.

In the present embodiment, a method has been described in which the time map information in the management information is recorded in a plurality of tables, but the time map information is stored in a file separate from the management information file. The map information may be recorded as an individual file for each PID. FIG. 26 shows the configuration of the management information file and the time map information file in this case. In FIG. 26, Mana
The ger directory contains VIDEO Manager
A file and a time map information file are recorded, and the time map information is generated for each PID. Here, VIDEO_Ma in the VIDEO_RT directory instead of the Manager directory.
A name file and a time map information file may be recorded. Further, the time map information file may take the form of a single large file instead of an individual file.

It is assumed that the VIDEO_Manager file of FIG. 26 has information indicating the correspondence between the PID and the time map information (FIG. 27). FIG.
It shows the data structure of the IDEO_Manager file, and PID is included in the map management information in this file.
And time map identification information indicating the corresponding time map information. The data structure of the time map information at this time is shown in FIG. 20 (a) or FIG. 25 (a).

In this embodiment, the DVD-RA
Although the M disk has been described, the present invention may be applied to other optical disks, hard disk drives, magnetic recording devices, and semiconductor memories.

In the present embodiment, it has been described that a time map is created for each PID for a video stream. However, a time map for each audio stream PID may be created by referring to the PID of an audio stream instead of a video stream. .

In the present embodiment, time map information is generated for each PID, and the PID is also recorded in the management information and the time map information. However, a time map is generated for each PID, and the time map information is generated. If you have information that can be distinguished from the recorded object,
It is not necessary to record the PID.

In the present embodiment, the digital broadcast P
Although it has been described that a time map is created for each ID, the present invention is not limited to digital broadcasting, and when an analog broadcast is self-encoded and recorded, a PID may be virtually set and time map information for each PID may be created. .

In the present embodiment, the link information is generated in units of one program or one recording operation. However, any number of programs, any number of recording operations, and disc information are recorded. Link information for the whole may be generated.

In the present embodiment, the data structure of the link information is shown in FIG. 21.
A different data structure may be used as long as it indicates link information of the time map.

[0129]

According to the information recording medium, the recording device and the reproducing device of the present invention, time map information is created for each PID of digital broadcasting. In addition, it is possible to reduce the memory capacity required for the recording and reproducing devices.

[Brief description of the drawings]

FIG. 1 is a view for explaining an example of the external appearance of a DVD recorder device and an interface with related devices;

FIG. 2 is a block diagram of a drive device of the DVD recorder.

FIG. 3 is a block diagram of a drive device of a DVD recorder equipped with an HDD and a semiconductor memory

FIG. 4 is a view for explaining a continuous area on a disk and a data storage amount in a track buffer;

FIG. 5 is a diagram for explaining the external appearance and physical structure of a disk.

FIG. 6 is a view for explaining a logical data space of a disk;

FIG. 7 is a view for explaining the directory and file structure of a disk.

FIG. 8 is a diagram showing a configuration of a video object.

FIG. 9 is a view for explaining an MPEG system stream.

FIG. 10 illustrates an MPEG-TS stream.

FIG. 11 is a diagram for explaining an MPEG-PS stream.

FIG. 12 illustrates a TS packet.

FIG. 13 illustrates a PAT table.

FIG. 14 is a view for explaining the arrangement of video objects on a disc.

FIG. 15 illustrates a data structure of video management information.

FIG. 16 is a view for explaining the data structure of video management information.

FIG. 17 is a view for explaining the relationship between PGC information, object information, and objects of video management information.

FIG. 18 is a block diagram showing a functional configuration of a playback device.

FIG. 19 is a block diagram illustrating a functional configuration of a recording apparatus.

FIG. 20 is a data structure diagram of time map information.

FIG. 21 is a data structure diagram of link information of a time map.

FIG. 22 is a data structure diagram of PMT and PID.

FIG. 23 is a flowchart of device operation during recording.

FIG. 24 is a flowchart of device operation during reproduction.

FIG. 25 is a data structure diagram of time map information having a single-layer structure.

FIG. 26 is a diagram of a file structure on a disc when a management information file and time map information are recorded as a plurality of files.

FIG. 27 is a data structure diagram when recording a management information file and time map information as a plurality of files.

[Explanation of symbols]

 Reference Signs List 100 DVD-RAM disk 101, 201 Optical pickup 102, 202 ECC processing unit 103, 203, 220 Track buffer 104, 210 Switch 105, 214 Encoder 106, 205, 206, 218 decoder 207 Audio decoder 208 Still image decoder 211 Control unit 212 System control unit 213 Analog broadcast tuner 215 Digital broadcast tuner 216 Analysis unit 217 Display unit 219 Digital I / F unit 221 Drive 222 User I / F unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/92 H04N 5/92 H (72) Inventor Hiroshi Hamasaka 1006 Kazuma Kazuma, Kadoma, Osaka Matsushita Electric Industrial Incorporated F term (reference) 5C053 FA25 GB06 GB37 JA21 5D044 AB05 AB07 BC06 CC06 DE38 DE39 DE53 EF05 FG18 GK12 5D077 AA30 BA26 CA02 DC03 EA33 EA34 FA06 FA09 5D110 AA17 AA27 AA29 DA03 DA06 DA11 DA17 DB03 DC01 DC16 DD

Claims (12)

[Claims] 1. An information recording medium for recording a video object and management information for managing reproduction of the video object, wherein time information on reproduction of the recorded video object and the video on the information recording medium are recorded. The time map information for associating the physical address of the object with the PID (Pa
An information recording medium which is generated separately for each of the IDs and recorded as a part of the management information. 2. The time map information according to claim 1, wherein time information relating to reproduction of said video object is directly associated with a physical address of said video object on said information recording medium by a single table. The information recording medium according to claim 1, wherein 3. The time map information is characterized by indirectly associating time information relating to reproduction of the video object with a physical address of the video object on the information recording medium using a plurality of tables. The information recording medium according to claim 1, wherein 4. The time map information includes a P during the program.
2. The method according to claim 1, wherein when the ID is changed, the information is recorded as another time map information in accordance with the PID, link information for compiling the time map information for the program is generated, and the link information is recorded. Information recording medium as described. 5. A recording apparatus for recording information on an information recording medium according to claim 1, wherein said means for generating said video object, and video object management information including said time map information for each PID in digital broadcasting. , A unit for recording the generated video object, and a unit for recording the generated video object management information. 6. The time map information directly associates time information relating to reproduction of the video object with a physical address of the video object on the information recording medium by using a single table. The recording apparatus according to claim 5, wherein 7. The time map information is characterized by indirectly associating time information relating to reproduction of the video object with a physical address of the video object on the information recording medium using a plurality of tables. The recording device according to claim 5, wherein 8. The time map information includes a P during the program.
If the ID is changed, the information is recorded as another time map information according to the PID, link information for summarizing the time map information for the program is generated, and the link information is recorded. Claim 5
The recording device according to any one of the preceding claims. 9. A reproducing apparatus for reproducing the information recording medium according to claim 1, wherein said reading means reads out said video object management information including said time map information, Reading means for reading the video object based on the video object management information including the time map information; and means for reproducing the read video object based on the read video object management information. A reproducing apparatus characterized by the above-mentioned. 10. The time map information, wherein time information relating to reproduction of the video object is directly associated with a physical address of the video object on the information recording medium using a single table. The playback device according to claim 9, wherein 11. The time map information is characterized by indirectly associating time information relating to reproduction of the video object with a physical address of the video object on the information recording medium using a plurality of tables. The playback device according to claim 9. 12. A reading means for reading out the link information for compiling time map information for the program, when the PID is changed during the program and the time map information is recorded as different time map information according to the PID. And P based on the read link information
Reading means for reading time map information for each ID;
A reading unit that reads the video object based on the read time map information for each PID; and a unit that reproduces the video object read based on the read time map information for each PID. The playback device according to claim 9.