JP2002352558A - Information recording medium and information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems that as the number of recorded programs increases, the formation of menus easily understandable to users and easily accessible by the users becomes difficult if information recording medium of a large capacity is used. SOLUTION: The title names of recorded programs, the names of performers, the number of vision and hearing times, genre, information indicating the final date of vision and hearing, etc., are stored in the information recording medium. An information recording and reproducing device forms a program list in order easily accessible by the users in accordance with the program addition information in forming the menu. Further, the information recording and reproducing device is provided with a retrieval function at the program title names, etc., by which the search and extraction with arbitrary key words is made possible.

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. 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.

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. Recording devices are becoming widespread. In a recorder having such a large-capacity storage medium, the number of stored programs increases, and it is difficult to create a menu that is easy for the user to understand and access.

[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 apparatus for creating a menu which is easy for a user to understand and access. Specifically, an object is to provide an apparatus having a function of displaying a list in order based on the program name of a program recorded on a recording medium, the recording date and time, the number of views, the genre, and the last viewing date and time information. . Another object of the present invention is to provide a device having a function of providing a menu that is highly accessible to a user by providing a function of searching and displaying a program by a title or the like.

[0005]

In order to solve the above-mentioned problems, an information recording medium according to the present invention is an information recording medium on which at least AV data and its management information are recorded. An information recording medium characterized in that information for specifying a manufacturer is stored in the management information, and a file storing additional information unique to the manufacturer is provided.

Further, the present invention is an information recording medium having an area for storing information on the number of times the recorded AV data has been reproduced.

Further, the present invention is an information recording medium characterized by having an area for storing date and time information of the last reproduction of recorded AV data.

Further, the present invention is an information recording medium having an area for storing a program name of recorded AV data.

Further, an information reproducing apparatus according to the present invention is a reproducing apparatus for reproducing AV data from an information recording medium having an area in which a program name of recorded AV data is stored. An information reproducing apparatus comprising means for searching a program name for a character string input via a user interface and displaying the corresponding program preferentially.

[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 an analog signal and a digital signal. Analog signals include analog broadcasting, and digital signals include digital broadcasting. In general, analog broadcasting is received and demodulated by a receiver built in a television device,
It is input to a DVD recorder as an analog video signal of NTSC or the like, and digital broadcasting is performed by STB (S
et Top Box) and demodulates to a digital signal.
It is input to the VD recorder and recorded.

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. Track buffer 103, track buffer 103
A switch 104 for switching input / output to the input / output unit, 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 equation, N_sec is the number of sectors constituting the ECC block, 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 equation, dNec 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. Overview 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 diagram 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. It should be noted that the 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,
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.

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 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 storing additional information unique to the manufacturer. The above-mentioned main subject of video information and main subject of audio information means that the bit rate is allocated to a large amount. VOB is used for applications such as movies,
OB 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 is subjected to spatial compression encoding that is completed within a frame, and the P picture and B picture are subjected to temporal compression encoding using correlation between frames. In MPEG, a section including at least an I picture is referred to as a GOP (Group of Picture).
e) is managed. 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 in FIG. 8 includes 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 (Decoding T
im Stamp) and PTS (Presentati)
on Time Stamp) is stored. DTS indicates the decoding timing of the picture / audio frame stored in the PES packet, and PTS indicates the presentation timing of video / audio output or the like. Note that it is not necessary to have PTS and DTS in all PES packet headers. If PTS and DTS are present in the header of the PES packet in which the head data of the I picture starts to be stored, there is no problem in decoding and output.

FIG. 12 shows the 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 packs 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.

(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, 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.

An access 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 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 includes a user-defined reproduction path information table, an original reproduction path information table, and a title search pointer.

As shown in FIG. 16, the reproduction 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 reproduction section of the object by the reproduction start time and the reproduction end time of the object. The reproduction start time and the reproduction end time are determined by the above-described access map.
It is converted into the actual recording position information of the object on the disk.

As shown in FIG. 16 (b), the cell group 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
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) 60 in the object on the time axis
c and end time information (E
nd_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 description will be given of a problem that occurs when map information of PS-VOB, TS1-VOB, and TS2-VOB is generated. 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. Therefore, D
The VD recorder detects an I picture and a time stamp as described below with respect to the map information of the TS2-VOB that records the stream encoded outside the recorder.

First, the detection of the I picture is performed by detecting the random access display information in 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. Regarding the time stamp, instead of the PTS, the PCR in the application field or the TS packet
A, which is the arrival timing transmitted to the VD recorder
TS 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.

[0069] However, the DVD recorder can 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 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 includes an optical pickup 201 for reading data from the optical disc 100, an ECC processing unit 202 for performing error correction on the read data, and a track buffer for temporarily storing the read data after error correction. 20
3, a PS decoder 205 for reproducing a program stream such as a video object (PS_VOB), a TS decoder 206 for reproducing a transport stream of a digital broadcast object (TS1_VOB), and an audio decoder 207 for reproducing an audio object (AOB). A still image decoder 208 for decoding a still image object (POB);
Switch 210 for switching data input to 206.
And a control unit 211 that controls each unit of the player.

Data recorded on the optical disk 100 is read from the optical pickup 201 and stored in the track buffer 203 through the ECC processing unit 202. The data stored in the track buffer 203 is P
The signal is input to one of the S decoder 205, the TS decoder 206, 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 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 disk information using the access 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 unit 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. .

(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.

There are two types of recording: 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, with regard to self-encoding recording, the operation of encoding an analog broadcast to PS-VOB and recording 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.

The encoder 214 video-encodes the AV data sent from the analog broadcast tuner 213,
Audio encoding and system encoding are performed and sent to the track buffer 220. Encoder section 214
Is the MPE that is encoding immediately after encoding starts.
The time stamp information of the head data of the G program stream is converted to the reproduction start time (PS_VOB_V_S_P
TM) to the system control unit 212, and then sends information necessary for creating an access map to the system control unit 212 in parallel with the encoding process. This value is
Start_P of cell information shown in FIG. 17 generated later
Set to TM. 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 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.

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.

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 analyzer 216.

The analysis unit 216 generates VOB information (TS2_TS) of the encoded MPEG transport stream (TS2-VOB) first received as a digital broadcast.
As information necessary for generating a VOBI, time stamp information included in the head data of the transport stream is extracted as start time information (TS2_VOB_V_S_PTM) and sent to the system control unit 212. The start time information corresponds to the Start 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.

The analysis unit 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 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 (TS2_VOB_V_E_PTM).
To the system control unit 212. This value is shown in FIG.
Is set to End_PTM of the cell information shown in FIG. This time stamp information becomes PCR or PTS. Also,
ATS, which is the timing when 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, 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.

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 (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 has an area for storing manufacturer-specific information. Inside the area, the title of the recorded program (and additional information such as performers) and the number of times of viewing are shown. Information indicating information and genre, information indicating last viewing date and time, and the like are stored.

An information recording / reproducing apparatus according to the present invention is an apparatus for recording / reproducing information on / from the information recording medium, wherein a character string search is performed on a program title name and a title name including a character string searched by a user. (Or additional information such as performers)
Has a function of listing programs including the same pattern and constructing a menu. As a result, the user can display a list of programs that have never been viewed or a list of programs that include a character string of “nainai size” in the program title, thereby providing the user with easy program selection. A system that can do this can be realized.

(9. Detailed Embodiment) The basic operation of the information recording / reproducing apparatus of the present invention will be described in detail below. TS2 which is an object that records digital broadcasting
Taking VOB # 1 as an example, the data structure of the MNF file will be described with reference to FIG. As described above, in the video management information file, T indicating the information for each TS2-VOB is set.
There is an S2-VOB information table, in which there is recorded object information for each TS2-VOB,
Inside it, general information of the corresponding object, attribute information of the object, an access map for converting the reproduction time of the object to an address on the disk,
The management information of the access map is stored.

The general information includes identification information 90a of the corresponding object, recording time 90b of the object, manufacturer I
The recorder has D90c and other information 90d, and the recorder records information that can identify the manufacturer of the recorder that records TS2-VOB # 1 in the manufacturer ID 90c. Here, an example of recording as Panasonic is shown. T
The additional information of S2-VOB # 1 is an MNF file P
anasonic. mnf file.

The file name of the MNF file is
D. The MNF file has MNF configuration information storing data management information of the MNF file, and an additional information table storing additional information corresponding to each object. The additional information # 1 includes additional information attribute information 91a which is type information for identifying what kind of additional information the information stored in the additional information # 1 is, and information for identifying which object the additional information is for. The object identification information 91b, the program title name 91c which is the program name of the object, the performer name 91d storing the performer name of the program, the genre name 91e indicating the genre name of the program, It includes a number of times of viewing 91f, which is information indicating whether the program has been viewed once, and a last viewing date and time 91g, which indicates the date and time when the program was last reproduced.

In this case, the additional information attribute information 91a includes
A value indicating that the corresponding additional information is the program menu additional information is set. The same value as the object identification information 90a is recorded in the object identification information 91b to indicate which object the corresponding additional information corresponds to. Program title name 91c and performer name 91
In d and the genre name 91e, a title acquired from an electronic program guide (EPG) or the like, names of performers, and a genre name are recorded. Since a method of acquiring program information using EPG or data broadcasting is known, a description thereof will be omitted. The value 0 is recorded for the number of times of viewing 91f at the time of new creation, and the value 0 is also recorded for the last viewing date and time. In this way, it is possible to use the MNF file to store additional information for each object therein and associate it with the corresponding object.

The basic operation of the recording apparatus when creating an MNF file will be described below with reference to FIG. 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 analyzer 216.

The analysis unit 216 generates VOB information (TS2_TS) of the encoded MPEG transport stream (TS2-VOB) first received as a digital broadcast.
As information necessary for generating a VOBI, time stamp information included in the head data of the transport stream is extracted as start time information (TS2_VOB_V_S_PTM) and sent to the system control unit 212. The start time information is set in Start_PTM of the cell information shown in FIG. This time stamp information is used for PCR or PTS.
become. 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 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 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 receiving process is completed, the system control unit 212, based on the information received from the analysis unit 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 OFF
Make 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. Also, when input directly from the digital I / F,
There may be a case where the stream is not an MPEG transport stream. 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.

If the MNF file corresponding to the manufacturer ID 90c shown in FIG. 20 is not present on the DVD-RAM disk 100, the system control unit 212 requests the drive 221 to create an MNF file based on the manufacturer ID. .

Further, the system control unit 212 newly adds an additional information table in the corresponding MNF file,
A value indicating that it is the program menu additional information is recorded in the additional information attribute information 91a, and the drive 221 is requested to record the same value as the object identification information 90a in the object information 80 in the object identification information 91b.

Further, the system control unit 212
The program title name 91c analyzed in step 6 and the performer name 91
In the fields of d, genre name 91e, number of viewings 91f, and last viewing date / time 91g, the drive 221 is requested to continuously record a value 0 indicating that it has not been reproduced yet.

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

Further, the basic operation of the recording / reproducing apparatus at the time of updating the MNF file will be described. As shown in FIG.
Data recorded on the D-RAM disk 100 is read from the optical pickup 201 and stored in the track buffer 203 through the ECC processing unit 202. The data stored in the track buffer 203 is T
The signal is input to the S decoder 206, 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.

Further, when the program menu additional information of the corresponding object already exists in the own MNF file, the control unit 211 increases the number of viewing times 91f of the corresponding additional information by one until the maximum value is reached, The drive is requested to record the current date and time information at the last viewing date and time 91g. As described above, by creating / updating the additional information in the MNF file, the recording / reproducing apparatus manages whether or not the user has viewed the corresponding program and furthermore, when the last viewing date and time is. Can be.

Using such additional information for each program,
The system control unit 212 shown in FIG. 19 creates a list of programs with a small number of views, and allows the display unit 217 to display a menu via the decoder 218. Further, even when the user wants to search for a program including a character string of “nainai size” from the program title, the search character string input by the user via the user I / F unit 222 is transferred to the system control unit 212. , System control unit 2
12, by searching and extracting a program title name including the character string from the additional information indicating the additional information for the program menu of the MNF file, a list of programs including the character string of the nainy size can be displayed. It becomes possible.

In the above description, the number of times of viewing 91f in the MNF file is represented by a numerical value that is incremented each time the user views, but is not limited to this, and is represented by a 1-bit flag. Alternatively, the information may be information for determining whether or not viewing has been completed.

In the above description, the MNF file is configured so that the manufacturer can store additional information unique to the MNF file. However, the present invention is not limited to this. These additional information may be stored.

Note that, in the above description, TS2-VO
The recording of B has been described as an example, but the present invention is not limited to this, and another object format may be used.

[0126]

According to the information recording / reproducing apparatus of the present invention, by providing additional information such as the number of times of viewing and the names of performers for each program, a menu can be displayed from various angles, such as displaying a list from unviewed programs. It can be generated, and there is an effect of improving user convenience.

Further, by providing a function of performing a search based on the additional information of a recorded program, it is possible to quickly and flexibly find a target program from a recording medium on which many programs are recorded.

[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 the relationship between the data structure of an MNF file and objects.

[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 5/85 H04N 5/85 B 5/92 5/92 H (72) Inventor Kawasaki Saki Kojiro Osaka 1006 Kadoma, Kamon, Fumonma-shi Matsushita Electric Industrial Co., Ltd.F-term (reference) AA29 DA02 DA04 DA06 DA11 DB03 DC05 DC16 DE01 EA07 FA08

Claims (5)

[Claims] 1. An information recording medium on which at least AV data and management information for the AV data are recorded, wherein information for specifying a manufacturer of a recording apparatus on which the AV data is recorded is stored in the management information; An information recording medium comprising a file in which additional information is stored. 2. The information recording medium according to claim 1, further comprising an area for storing information on the number of times the recorded AV data has been reproduced. 3. The information recording medium according to claim 2, further comprising an area for storing date and time information of the last reproduction of the recorded AV data. 4. The information recording medium according to claim 3, wherein the information recording medium has an area storing a program name of recorded AV data. 5. A reproducing apparatus for reproducing AV data from an information recording medium having an area storing a program name of recorded AV data, wherein a user interface is selected from among the program names stored in the information recording medium. An information reproducing apparatus characterized by comprising means for searching for a character string input via the PC and displaying the corresponding program preferentially.