JP2002369137A - Information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a device and a recording medium in which contents can be easily reproduced after editing when a user edits the recorded contents also, in a device for recording and reproducing an MPEG transport stream. SOLUTION: This device comprises a means for extracting PSI information essential in decoding an MPEG transport stream and SI information as program appended information to reproduction management information corresponding to the stream or an arbitrary section in the stream, or a means for storing in the head of the stream. An information recording medium records the above.

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 particularly to a medium for recording multimedia data including moving image data, still image data, audio data, and data in various formats such as data broadcasting. Related to 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.

In recent years, digital broadcasting has also started in Japan, and it has become possible to simultaneously multiplex and transmit video, audio and data of a plurality of programs on an MPEG transport stream, and to store storage media such as HDDs and DVDs. Digital broadcast recording devices that have been used are becoming widespread. However, in the transmission form of digital broadcasting using the MPEG transport stream, the transmission is performed in a format optimized for the user to view (decode) the broadcast in real time, and the broadcast is recorded on a storage medium and edited. It is currently being broadcast in a format that is unsuitable for doing so.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an information recording medium for an apparatus for recording / reproducing an MPEG transport stream as well as a broadcast. Another object of the present invention is to provide an apparatus and an information recording medium that can easily reproduce the edited content even when the user edits the content recorded by the user.

[0005]

In order to solve the above problems, an information recording medium according to the present invention is an information recording medium on which at least an MPEG transport stream and its management information are recorded, and a PSI of the MPEG transport stream. An information recording medium characterized in that a packet storing / SI information is arranged at the head of a stream.

[0006] Furthermore, the PS placed at the head of the stream
An information recording medium characterized in that input time information of a packet storing I / SI information to a decoder is described to be 1 Mbps or less.

[0007] Further, at the head of storing the elementary stream of the MPEG transport stream, a random_access_indicator is provided.
And / or payload_unit_start_
An information recording medium characterized in that a packet whose indicator is 1 is arranged.

[0008] Alternatively, an information recording medium characterized in that part or all of PSI / SI information of each MPEG transport stream is described in reproduction management information corresponding to each stream.

[0009] Alternatively, an information recording medium characterized in that part or all of PSI / SI information of an MPEG transport stream of a corresponding section is described in reproduction management information corresponding to an arbitrary reproduction section. is there.

[0010]

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.

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 device, 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 / 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 above-mentioned video information of analog broadcasting and digital broadcasting. 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 device 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. 3A shows an address space on the disk. As shown in FIG. 3A, the AV data is [a1, a2]
In this case, the data stored in the track buffer is supplied to the decoder unit 106 while seeking from a2 to a3 is performed. Continuous reproduction of data becomes possible. FIG. 3B shows the state at this time.

The AV data that has been read at the position a1 is input to the track buffer 103 at time t1, and data output 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 certain amount, continuous supply of AV data is possible even if 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_sec * 8 * S_size) * (1−Vb / Va)) In some cases, a defective sector may occur 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, reproduced is described. But DVD-RAM
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 the lead-in area, the lead-out area, and the 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.

The group of sectors is not necessarily arranged continuously in the volume space, but is partially arranged in a discrete manner. 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,
TS1_VOB, TS2_VOB, AOB, POB, M
There is NF.

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.

Generally, PS_VOB, TS1_VO
B and TS2_VOB are objects each having both video information and audio information and mainly composed of video information. Among them, TS1_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 DV.
An object encoded outside of the D recorder,
An object whose data structure such as the internal picture structure is partially unknown.

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 recorded on a disk 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 MNF is a file unique to the manufacturer, and stores additional information for supporting the operation of the recording / reproducing apparatus.

The above-mentioned subject of video information and subject of audio information means that the assignment of the bit rate is large.
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, a 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.

A 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.

The DTS (Decodi) is included in the PES header.
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.

FIG. 12 shows details of the structure of the TS packet. 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 pack of the program stream and the arrangement of the TS packets of the transport stream on the disk 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 (TS1-VOB / TS2-V) in the form of a transport stream
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.

In the above description, the 8 KB Capsule
It is assumed that 43 MPEG transport packets are stored in one AT, but the present invention is not limited to this.
S1 (fixed byte length) and one MPEG transport packet form a pair, TS1-VOB / TS2-
Recording may be performed by a method such as forming a VOB.

(5. Outline of AV Information Management Information and Playback Control) 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, an access map for converting the reproduction time of the object into an address on the disk, and management information of the access map. I have. The general information includes identification information of the corresponding object, the recording time of the object, a manufacturer ID, and the like. The attribute information includes video stream information (V_ATR) such as a video stream coding mode.
And the number of audio streams (AST_Ns)
And audio stream information (A_ATR) including a coding mode of the audio stream.

There are two reasons for requiring an access map. 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 access map needs to be updated.

The second reason is that an AV stream generally has two references, a time axis and a data (bit string) axis, and there is no perfect correlation between these two references. 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 an access 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 determined by the access map described above.
It is converted into the actual recording position information of the object on the disk.

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

FIG. 17 shows objects, cells, PGCs,
FIG. 3 is a diagram specifically illustrating a relationship between access maps. As shown in FIG. 17, 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 specifies the object type and the reproduction section of the object. 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 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 access 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 the 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 is impossible to detect the system layer. In this case, however, it is necessary to indicate that there is no valid map information because map information cannot be generated. 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 access 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 objects from 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 Reproduction 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 disc 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 from 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 disk information using the access map of the corresponding VOB information.

The player according to the present embodiment further includes:
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 unit 211 determines whether random access reproduction is possible or not based on the map management information shown in FIG.
If the access point information flag is valid, the access 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 M100. The digital I / F unit 219 is an interface that outputs data to an external device by a communication unit such as IEEE1394.

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 start of encoding, the encoder unit 214 sends the time stamp information of the head data of the MPEG program stream being encoded to the system control unit 212 as the reproduction start time (PS_VOB_V_S_PTM), and subsequently creates an access map. Information necessary for this is sent to the system control unit 212 in parallel with the encoding process. This value is used in FIG.
Start_PTM of the cell information shown in FIG. Time stamp information is generally PTS, but SCR
May be substituted.

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 has 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 end of the encoding process, 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 an access map suitable for the object type and map management information. System control unit 21
2 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.

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 (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.

It is needless to say that analog broadcasting 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 section 216 further analyzes the system layer of the MPEG transport stream and detects information necessary for creating an access 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 (r
The detection is performed based on (andam_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 processing, 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 section 212, based on the information received from the analysis section 216, displays the TS2-VOB VOB information (T
S2_VOBI) and playback control information.

Here, the generated VOB information includes an access map suitable for the object type and map management information. 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 access map. The self-encoding flag is O
Make FF settings. If a valid access map cannot be generated, the map validity information is set to invalid. As a case where a valid access 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. In the case where the data is directly input from the digital I / F, there may be a case where the stream is not an MPEG transport stream.

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 above 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 the recording on behalf of the user. And an end request are issued, but the operation of the DVD recorder is not essentially different.

(8. Outline of the Invention) The information recording medium of the present invention is for recording data in various formats, and includes contents of analog broadcasting or digital broadcasting, and various types of data inputted through an analog / digital interface. An information recording medium on which various data are recorded. The information recording / reproducing apparatus of the present invention is an apparatus for recording / reproducing AV data on the information recording medium.

In particular, the information recording medium of the present invention includes MPE
An AV file recording a G transport stream and a Video describing reproduction management information of the AV data.
o Manager file is recorded, and the Video Manager file further includes a PSI (Program Specific I / O) for each object.
nformation: essential information for decoding a specific program in an MPEG transport stream) or SI
(Service Information: attribute information attached to a program) is stored.

The information recording medium of the present invention includes an MPE
MPEG transport packets including PSI / SI information are concentrated and arranged at the head of a VOB recorded in the G transport stream format.

The information recording / reproducing apparatus of the present invention has means for recording a stream as described above, and creating and reading management information. This makes it possible to interpret PSI / SI information intensively arranged at the beginning of a VOB and to acquire PSI / SI information from management information when a stream is played back from the beginning or when playing back from the middle. Thus, the information necessary for decoding can be immediately sent to the decoder, and the stream can be decoded and the attribute information can be quickly obtained.

(9. Detailed Embodiment) Regarding the information recording medium of the present invention, a TS2-VOB which is an object in which a digital broadcast is recorded is taken as an example, and Vid will be described using FIG.
The data structure of the eo Manager file is shown below. As described above, in the video management information file, there is a TS2-VOB information table indicating information for each TS2-VOB.
There is object information for each B, in which general information of the corresponding object, attribute information of the object, an access map for converting the reproduction time of the object into an address on the disk, management information of the access map Is stored.

The attribute information 80a includes PSI / SI Information (PS) storing PSI / SI information.
I_Info) 90a and Vi which is video attribute information
deo Attribute (V_ATR) 90b,
Audio Stream describing the number of audio streams
am Number (AST_Ns) 90c and Audio Attribute which is attribute information of the audio stream.
AV attribute information such as te (A_ATR) 90d is stored.

Further, the PSI_Info 90a is composed of one or more PSI_Abstract. This is because there is a case where there are a plurality of different PSI information in one VOB and a case where the PSI information is fixed and does not change in one VOB. If there is a plurality of different PSI information in one VOB, PSI_Info9
0a and the number of individual PSI_Abstracts
Management information indicating an area where the _Abstract information is valid is separately added.

Hereinafter, it is assumed that the PSI information in each VOB is unchanged, and one PSI_Abstra is assigned to one VOB.
ct will be described as an example, but even when a plurality of PSI information is stored in one VOB, the application range of each PSI information is determined only, and is essentially the same. . PSI_Abstract contains PMT
Stream_type of video or audio stream extracted from packet (information describing coding method)
And its PID (elementary_PID) are listed.

Referring to FIG. 21, VO on the information recording medium will be described.
A method of storing the PSI / SI packet in B will be described. PSI
The MPEG transport packet storing the / SI information is placed at the head of TS1-VOB and TS2-VOB, which are VOBs in the MPEG transport stream format.

Hereinafter, the basic operation of the apparatus for recording a VOB storing such an MPEG transport stream will be described in detail with reference to FIG. 19, taking the case of recording a digital broadcast as an example. The digital broadcast recording request by the user is
The information 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. MP sent from digital broadcast tuner 215
The EG transport stream is transferred to the track buffer 220 through the analysis unit 216. Analysis unit 216
Is an encoded MPEG transport stream (TS2-VO) first received as a digital broadcast.
As information necessary for generating the BOB information (TS2_VOBI) of B), the PSI / SI information of the corresponding stream is extracted and sent to the system control unit 212 to generate the PSI_Info 90a.
It also sends PEG transport packets.

Further, the PID of the video stream is specified, and the time stamp information included in the head data of the transport stream is replaced with the start time information (TS2_VOB_V).
_S_PTM) and sends it to the system control unit 212. The start time information is set in Start_PTM of the cell information generated later and 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 section 216 further analyzes the system layer of the MPEG transport stream and detects information necessary for creating an access 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 (r
The detection is performed based on (andam_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 transmits the MPE including the PSI / SI information.
G transport packets are collected, and the ATS is described so that the transfer interval does not exceed the transfer rate of 1 Mbps, and is centrally arranged at the head of the VOB.
om_access_indicator and / or payload_unit_start_indica
The control is performed so that the recording is started from the packet whose tor is 1. 1 Mbps packet storing PSI / SI information
Is transmitted at a transfer rate that does not exceed the maximum transmission rate because of the required specifications of the MPEG transport stream.

Further, 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 sent to the user I /
The information is transmitted to the system control unit 212 through the F unit 222,
The system control unit 212 issues a stop request to the digital tuner 215 and the analysis unit 216.

The analysis unit 216 receives the analysis stop request from the system control unit 212, stops the analysis processing, 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 receiving process 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 an access map suitable for the object type and map management information. 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 access map. The self-encoding flag is O
Make FF settings. If a valid access map cannot be generated, the map validity information is set to invalid. As a case where a valid access 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. In the case where the data is directly input from the digital I / F, there may be a case where the stream is not an MPEG transport stream.

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. Further, the extracted PSI / S0 is added to the PSI_Info 90a in the TS2-VOB information of FIG.
Set I information.

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 above 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 the recording on behalf of the user. And an end request are issued, but the operation of the DVD recorder is not essentially different.

The PSI of FIG. 20 created in this way is
The basic operation of a playback apparatus that performs efficient playback using the _Info 90a and an MPEG transport packet including PSI / SI information arranged at the beginning of the VOB shown in FIG. 21 will be described in detail with reference to FIG. explain. As shown in the figure, the playback device is a DVD-RAM disc 100.
Optical pickup 201 for reading data from an ECC processing unit 202 for performing error correction and the like on the read data
And a track buffer 203 for temporarily storing read data after error correction, and a moving image object (PS_
PS decoder 205 for reproducing a program stream such as VOB), a TS decoder 206 for reproducing transport stream objects (TS1_VOB, TS2_VOB), and an audio object (AOB).
Audio decoder 207 for reproducing a video image, and a still image decoder 208 for decoding a still image object (POB)
, 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.

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 stores the data to be read out in the reproduction path information (UD_PGC # 1) shown in FIG.
Is determined based on the reproduction sequence indicated by. That is, FIG.
In the example, the control unit 211 first reproduces the entire section (U_CELL # 1) of TS2_VOB # 1,
Control is performed to reproduce a partial section (U_CELL # 2) of TS2_VOB # 2.

The control section 211 can acquire the type of cell to be reproduced, the corresponding object, the reproduction start time of the object, and the reproduction end time from 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 a disk address using the access map of the corresponding VOB information.

Further, the control unit 211 controls the TS2 in FIG.
Since reading is started from a PSI / SI packet in which a program and attribute information of an MPEG transport stream are described at the head of _VOB # 1, decoding can be performed from an elementary stream immediately after reading the PSI / SI packet.

Further, in the case of FIG. 21, the video packet at the head of the elementary is random_access_in.
dilator or / and payload_uni
Since t_start_indicator is 1 (meaning that an I picture starts in the first video packet), decoding by the decoder is possible from the first video frame.

Further, the control unit 211 controls the UD_PGC # 1
When the playback target transitions to U_CELL # 2 during playback of U_CELL # 2, Start_PTM and E_
By converting the nd_PTM into the address of the disk using the access map of the corresponding VOB information, the reproduction can be continued.

Further, PS corresponding to U_CELL # 2
By interpreting the I_Info 90a, even if no PAT or PMT packet is arranged at the head of U_CELL # 2 as shown in FIG. 21, the PID of the video or audio stream is specified and supplied to the corresponding decoder. , Decoding can begin.

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 access 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. .

In the above description, PSI_Info is created using TS2-VOB as an example, and PS
Although it has been described that I / SI packets are arranged, the present invention is not limited to this, and may be similarly applied to a TS1-VOB which is a self-encoding stream, or may be applied to other MPEG transport streams. May be applied.

In the above description, the PSI / SI information is extracted and the PSI / SI packet is arranged at the head of the stream by taking the MPEG transport stream as an example. However, the present invention is limited to the MPEG transport stream. Instead, if the stream includes packets indicating the configuration information and attribute information of the stream and is transmitted and received in a time-division manner, the configuration information and attribute information can be similarly extracted and placed at the head of the stream. The same effect can be obtained.

In the description of FIG. 21, TS2-VO
Random_access_indicator of the first packet of U-CELL # 2 which is a partial section of B # 2
Or payload_unit_start_indi
Although there is no particular restriction on the value of the cator, the beginning of the cell is always random_access_indica
tor and / or payload_unit_st
The art_indicator may be set to be 1, and in this case, decoding can be performed from the head of the cell.

Note that in the above description, PSI_Abst
Ract contains the st of each elementary stream.
beam_type (encoding method information) and element
Although the description has been made as describing the TARY_PID (PID value), the present invention is not limited to this, and the CAT (Con
digital Access Table: conditional access system information) or NIT (Network Information).
The information extracted from the “Mation Table: transmission path information” may be described, or the SDT (Se
service Description Table: information on the organization channels and broadcasters) and SIT (Sel).
action InformationTable: program information transmitted in a partial transport stream) or DIT (Discontinuity Inf).
operation Table: discontinuous point information of a partial transport stream), EIT (Even
t Information Table (information such as a program name) may be described.

In FIG. 21, TS2-VOB # 1
At the beginning of PAT, PMT, CAT, SDT, S
Although the example in which the PSI / SI packet of the IT is arranged is shown, the PSI / SI packet following the PAT and the PMT arranged at the head of the stream is any other type of PSI / SI.
I packet or PAT, PM at the head of the stream
The PSI / SI packet following T may not be present, or the PSI / SI packet may not be arranged at the head of the stream and may be substituted by using information extracted in PSI_Abstract.

It is to be noted that one or more Private Sects are provided at the head of TS2-VOB # 1 in FIG.
It is also possible to arrange an MPEG transport packet containing an Ion and describe a part of the information extracted from the PSI / SI information in the stream in the Private Section.

[0138]

According to the information recording / reproducing apparatus of the present invention, the MPE
PSI information essential for decoding the G transport stream and SI information which is program ancillary information are concentrated at the beginning,
In order to record the stream, it is possible to interpret the configuration of the MPEG transport stream at the time of reproduction and immediately start decoding from the beginning.

Further, by extracting the PSI / SI information of the recorded MPEG transport stream as reproduction management information, even when the reproduction is started from the middle of the recorded stream, the configuration information of the stream to be reproduced can be immediately changed. It is possible to interpret and start decoding.

As described above, since it is possible to easily start playback of the stored MPEG transport stream from an arbitrary point, even if a user sets a complicated playback path, a system for easily continuing playback control. Can be provided.

[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 view for explaining a continuous area on a disk and a data accumulation amount in a track buffer;

FIG. 4 is a block diagram of a DVD recorder provided with a semiconductor memory card and a hard disk drive.

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 view for explaining playback management information in which PSI / SI information is stored.

FIG. 21 is a view for explaining the relationship between VOB and PSI / SI information.

[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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 27/00 H04N 5/85 Z 27/034 5/92 H H04N 5/765 5/91 L 5/85 5/93 C 5/93 E 5/937 G11B 27/02 K (72) Inventor Wataru Ikeda 1006 Ojidoma, Kadoma, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. 5C052 AA04 AB03 AB04 AB05 CC11 CC12 DD04 5C053 FA20 FA24 GA11 GB06 GB14 GB15 GB37 HA31 JA03 JA21 LA01 LA06 LA07 LA11 5D044 AB05 AB07 BC06 CC06 DE02 DE03 DE14 DE37 DE49 DE54 DE57 DE58 EF05 FG19 GK12 5D110 AA17 AA27 AA29 CA07 CA42 CB07 CC06 CF05 DB04 DB11

Claims (6)

[Claims] 1. An information recording medium on which at least an MPEG transport stream and management information for the MPEG transport stream are recorded.
An information recording medium, wherein a packet storing SI information is arranged at the head of a stream. 2. The information recording medium according to claim 1, wherein the input time information of the packet storing the PSI / SI information arranged at the head of the stream to the decoder is 1 Mbp.
An information recording medium characterized by being described as follows. 3. An information recording medium on which at least an MPEG transport stream and its management information are recorded.
An information recording medium, wherein a packet whose access_indicator is 1 is arranged. 4. An information recording medium on which at least an MPEG transport stream and its management information are recorded, wherein a payload at the head of storing the elementary stream of the MPEG transport stream is provided.
An information recording medium in which a packet whose _unit_start_indicator is 1 is arranged. 5. The information recording medium according to claim 1, wherein PSI / SI information of each MPEG transport stream is included in reproduction management information corresponding to each stream. An information recording medium characterized in that a part or all of the information is described. 6. The information recording medium according to claim 1, wherein the PSI of the MPEG transport stream of the corresponding section is included in the reproduction management information corresponding to an arbitrary reproduction section. / Information recording medium characterized in that part or all of SI information is described.