KR100828343B1 - Method, apparatus and information storage medium for recording broadcast program - Google Patents

Abstract

The present invention relates to a method, an apparatus for recording a broadcast program, and an information storage medium thereof.

According to the present invention, there is provided a method of recording a broadcast program on an information storage medium, comprising: (a) extracting an information packet including control information necessary for recording or playing back the broadcast program and recording the information packet in a navigation data area; And (b) extracting data packets constituting the broadcast program based on the information packet and recording the extracted data packets in a program area formed separately from the navigation area. Thereby, even if playback is started at any point in the recorded program, there is no delay time and playback can be performed without discarding packets.

Description

Method, apparatus and information storage medium for recording broadcast program

1 is a block diagram of a recording apparatus capable of recording a broadcast program according to the present invention;

2 is an embodiment of FIG.

3 and 4 are reference diagrams for explaining an MPEG transport stream;

5 is a reference diagram for explaining an information storage medium on which an MPEG broadcast program is recorded by a recording apparatus according to the present invention;

6 is an example for explaining a structure of a program defined through navigation data;

7 is a pack structure diagram of a TOBU,

8 is an example in which a TOB is recorded;

9 is a data structure diagram of an information storage medium recorded according to the first embodiment of the present invention;

10 is a data structure diagram of navigation data including a PAT table and a PMT table according to the first embodiment of the present invention;

11 is a flowchart for explaining a method for recording an MPEG broadcast program;

12 is a data structure diagram of a program recorded according to the second embodiment of the present invention;

13 is a block diagram of a playback apparatus according to an embodiment of the present invention;                 

14 is a flowchart for explaining a playback method according to the first embodiment of the present invention;

15 is a flowchart for explaining a playback method according to the second embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of recording and reproducing broadcast programs, and more particularly, to a method, an apparatus, and a recording medium for recording a program broadcast in an MPEG transport stream.

A digital broadcasting station converts a TV or radio program produced by a program source, that is, a camera or a microphone, into a digital format for broadcasting. In particular, in the case of digital TV broadcasting, television signals are compressed through a moving pictures expert group (MPEG) system and transmitted to each home or office. The MPEG-2 system removes redundancy from each TV frame or successive frames, divides each frame into a plurality of blocks, and processes the DCT (Discrete Cosine Transform) in blocks, and then compresses the frames. The compressed data is packed and transmitted into various data packets such as a video packet, an audio packet, and an additional data packet. These data packets are called MPEG transport packets, and a plurality of consecutive MPEG transport packets are called an MPEG transport stream.

The MPEG transport packet for digital TV broadcasting includes a PAT (Program Association Table) packet and a PMT (Program Map Table) packet as packets in which control information for recording / reproducing is recorded. The PAT packet and the PMT packet are repeatedly transmitted at regular intervals even when one program is being broadcast due to the characteristics of the broadcast. This is to allow the user who turned on the TV at the beginning of the program or the user who turned on the TV while the program is being broadcast for a while to watch the program.

A device connected to a conventional digital TV capable of recording and playing back a broadcast program receives an MPEG transport stream and records it as it is. Therefore, the PAT packet and PMT packet included in the MPEG transport stream are also recorded along with the remaining data packets. Therefore, if the user commands to jump from a specific entry point (playback start point) to a specific entry point during playback, all video packets, audio packets, or additional data packets until the new PAT and / or PMT packets are read are discarded. You lose. This is because a PAT packet and a PMT packet are required for decoding. If you accidentally jump ahead of the recorded location of the PAT packet and / or PMT packet, you can play the program with very little delay, but if you jump directly behind the recorded location of the PAT packet and / or the PAT packet, the next PAT There is a problem that the program can be played only after the packet and / or PMT packet has been recorded, that is, after a considerable delay has elapsed.

Accordingly, an object of the present invention is to provide a method, apparatus, and a recording medium for recording a broadcast program so that playback can be performed without any delay time at any point in the playback.

The above object is a method of recording a broadcast program on an information storage medium according to the present invention, comprising the steps of: (a) extracting an information packet including control information necessary for recording or reproducing the broadcast program and recording it in a navigation data area; ; And (b) extracting data packets constituting the broadcast program based on the information packet and recording the extracted data packets in a program area formed separately from the navigation area.

Step (a) may include: (a1) extracting a first information packet indicating an identifier of packets in which identifiers of data packets constituting at least one broadcast program are recorded from the digital broadcast stream; (a2) extracting a second information packet informing of identifiers of data packets constituting the broadcast program based on the first information packet; And (a3) recording the first information packet and the second information packet.

Step (a) may include (a11) extracting a PAT packet and a PMT packet from an MPEG transport stream; And (a12) recording the extracted PAT packet and PMT packet in the navigation data area, or (a21) extracting the PAT packet and PMT packet from the MPEG transport stream; (a22) generating a PAT table and a PMT table by combining the extracted PAT packets and PMT packets; And (a23) recording the generated PAT table and PMT table in the navigation data area.                     

According to another aspect of the present invention, an object of the present invention is an apparatus for receiving and recording a broadcast program on an information storage medium, comprising: an information packet including control information necessary for recording or reproducing the broadcast program, and the broadcast program. A filter unit for extracting a data packet constituting a; A control unit providing identifiers of data packets constituting the broadcast program to the filter unit based on the information packet; And a recording unit which records the information packet in the navigation area and records the data packet extracted by the filter unit in a program area formed separately from the navigation area.

In addition, the above object is a device for receiving a broadcast program and recording it on an information storage medium, the filter unit for extracting the first information packet and the second information packet from the digital broadcast stream: configuring the broadcast program from the first information packet A control unit that finds an identifier of the second information packet in which the identifier of the data packet is recorded and provides the identifier to the filter unit; And a recording unit for recording the first information packet, the second information packet, and the data packet extracted by the filter unit on the information storage medium.

In addition, the filter unit for filtering the PAT packet and PMT packet from the MPEG transport stream, and the data packet constituting the MPEG broadcast program; A control unit which finds an identifier of the data packets from the filtered PAT packet and the PMT packet and delivers the identifiers to the filter unit; And a recording unit for receiving a data packet from the filter unit and recording the data packet in a program area of the information storage medium, and receiving a PAT packet and a PMT packet from the control unit and recording the data packet in a navigation data area formed separately from the program area. It is also achieved by a recording apparatus characterized by the above-mentioned.

In addition, the above object is an apparatus for receiving and recording an MPEG broadcast program on an information storage medium, comprising: a filter unit for filtering a PAT packet and a PMT packet from an MPEG transport stream, and filtering a data packet constituting the MPEG broadcast program; A controller configured to combine the filtered PAT packet and the PMT packet to construct a PAT table and a PMT table, and to identify identifiers of the data packets from the configured PAT table and PMT table and to transfer the identifiers to the filter unit; And a recording unit which receives the data packet from the filter unit and records the data packet in a program area of the information storage medium, receives the PAT table and the PMT table from the control unit, and records the data packet in a navigation data area formed separately from the program area. It is also achieved by a recording apparatus characterized by the above-mentioned.

In addition, the above object is an apparatus for receiving and recording an MPEG broadcast program on an information storage medium, comprising: a filter unit for filtering a PAT packet and a PMT packet from an MPEG transport stream, and filtering a data packet constituting the MPEG broadcast program; A control unit which finds an identifier of the data packets from the filtered PAT packet and the PMT packet and delivers the identifiers to the filter unit; And a recording unit which collects the data packets transmitted from the filter unit and records them in a predetermined recording unit TOBU so that the corresponding PAT packet and PMT packet provided from the control unit are located in front of the recording unit TOBU. It is also achieved by a recording apparatus characterized by the above-mentioned.                     

According to another aspect of the present invention, the above object is an information storage medium in which a broadcast program is recorded, comprising: a program area in which data packets constituting a broadcast program are recorded; And a navigation data area formed separately from the program area and including an information packet including control information necessary for recording or reproducing the broadcast program.

The information packet preferably includes a first information packet in which an identifier of a second information packet is recorded, and a second information packet in which an identifier of a data packet constituting the broadcast program is recorded.

In addition, the above object is an information storage medium in which the MPEG broadcast program is recorded, comprising: a program area in which data packets constituting an MPEG transport stream are recorded; And a PAT table and a PMT table, which are formed separately from the program area and are generated by combining a PAT packet and a PMT packet including control information necessary for recording or playing the broadcast program. It is also achieved by the medium.

Preferably, the PAT table includes only information on the PMT packet of the corresponding program among the information included in the PAT packet, or information necessary to reproduce all the recorded programs is included in the recorded program information table. The program information table is included in a management table containing management information for all the plurality of recorded programs, and the management table further includes a pointer table for indicating general information about the information storage medium and a location of a program information table. do.                     

According to another aspect of the present invention, an object of the present invention is an information storage medium having computer readable program codes for implementing a method of recording a broadcast program, wherein the control information necessary for recording or reproducing the broadcast program is included. First program code for implementing a step of extracting an information packet and writing it to a navigation data area; And a second program embodying a step of extracting data packets constituting the broadcast program based on the information packet and recording the data packets constituting the broadcast program in a program area formed separately from the navigation area. .

The first program code may include: program code for extracting, from a digital broadcast stream, a first information packet indicating an identifier of packets in which identifiers of data packets constituting at least one broadcast program are recorded; Program code for implementing a step of extracting a second information packet informing of identifiers of data packets constituting a corresponding broadcast program based on the first information packet; And program code for implementing the steps of recording the first information packet and the second information packet.

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

1 is a block diagram of a recording apparatus capable of recording a broadcast program according to the present invention.

Referring to FIG. 1, the recording apparatus includes a filter unit 1, a control unit 2, and a recording unit 3.                     

The filter unit 1 filters an information packet including control information for reproduction / recording from a program source for supplying a broadcast program, for example, a digital broadcast stream transmitted from a digital TV broadcast station. Furthermore, the data packet constituting the selected broadcast program is filtered.

A digital broadcast stream is a sequence of data packets and information packets constituting a broadcast program. The information packet may be classified into two types, one of which is a first information packet indicating an identifier of packets in which identifiers of data packets constituting at least one broadcast program are recorded. It is a 2nd information packet which informs the identifier of the data packet which comprises. That is, the identifier of the second information packet is recorded in the first information packet, and the identifier of the data packet constituting the program is recorded in the second information packet. If multiple channels are supported, the second information packet exists as many as the number of corresponding channels. However, the number of packets physically constituting each information packet may be plural. Furthermore, the information packet may not be divided into two but may be integrated into one or separated into three or more.

When the digital broadcast stream is an MPEG transport stream, an information packet including control information for reproduction / recording is a PAT packet and a PMT packet. The PAT packet is a first information packet and the PMT packet is a second information packet. The data packet includes a video packet, an audio packet, and / or an additional data packet.

The control unit 2 receives the filtered information packets, the first information packet and the second information packet from the filter unit 1, and finds the identifier of the data packet constituting the corresponding program based on these, and then the filter unit 1 To pass. In the case of an MPEG broadcast program, the control unit 2 finds the packet identifier (PID) of the MPEG transport packet constituting the program selected by the user from the PAT packet and the PMT packets and delivers the packet identifier (PID) to the filter unit 1.

The filter unit 1 provides the data packet corresponding to the transmitted identifier, a video packet, an audio packet, and / or an additional data packet in the case of an MPEG broadcast program to the recording unit 3, and the recording unit 3 uses the optical data as an information storage medium. Record on the disc 9.

2 is an embodiment of FIG. 1.

Referring to FIG. 2, the filter unit 1 includes a PAT filter 11, a PMT filter array 13, and a target packet filter array 17. The control unit 2 includes a PAT assembler 21, a PMT assembler 22, and a main controller 23.

The PAT filter 11 filters the PAT packet from the MPEG transport stream and outputs it to the PAT assembler 21. The number of PAT packets may vary depending on the playback time of the broadcast program, the number of channels supported, and the like. The remaining packets except the PAT packet pass through the PAT filter 11 and are buffered in the buffer 12. The PAT assembler 21 combines at least one PAT packet to construct a PAT table. When the PAT table is completed, the PAT assembler 21 provides the packet identifier (PID) of the corresponding PMT packet recorded in the completed PAT table to the PMT filter array 13. The PMT filter array 13 receives the remaining packets from the buffer 12 and then filters through the plurality of PMT filters 14 provided with the PMT packets corresponding to the packet identifiers provided from the PAT assembler 21 to the PMT assembler 22. ) The PMT packet for a predetermined program may also vary depending on the playback time of the program, the type of data, and the like. Similarly, the remaining packets except the PMT packets pass through the PMT filter array 13 and are buffered in the buffer 16. The PMT assembler 22 combines the PMT packets to complete the plurality of PMT tables and then provides them to the main controller 23. When a selection command for a specific program is input from a user, the main controller 23 transfers packet identifiers of data packets constituting the program to the target packet filter array 17 by referring to the PMT table. Furthermore, the main controller 23 provides the corresponding PAT table and PMT table to the recording unit 3. The target packet filter array 17 receives the remaining packets from the buffer 16, and then filters the data packets corresponding to the packet identifiers provided from the PMT assembler 22 through the plurality of packet filters 18. 3) to provide. The remaining packets passing through the target packet filter array 17 are discarded. The recording unit 3 records the packet provided from the target packet filter array 17 and the PAT table and PMT table provided from the main controller 23 on the optical disk 29.

Alternatively, the main controller 23 recombines the PAT packet and the PMT packet to the recording unit 3 instead of delivering the corresponding PAT table and the PMT table to the recording unit 3 or directly transfers the corresponding PAT packet to the recording unit 3. The PMT assembler 22 may be controlled to transmit the PMT packet from the PMT assembler 22 to the recording unit 3. In addition, the main controller 23 may control the PAT assembler 21 and the PMT assembler 22 to transmit the corresponding PAT packet and the PMT packet to the recording unit 3, respectively. The recording unit 3 records the received PAT packet and PMT packet on the optical disc 29.                     

3 and 4 are reference diagrams for explaining the MPEG transport stream.

Referring to FIG. 3, video packets 31, 33, 34, and 37 and audio packets 32, 33, 35, and 36 are multiplexed in the inputted MPEG transport stream 300. When the MPEG transport stream is received, the video packets 31, 33, 34, 37 and the audio packets 32, 33, 35, 36 constituting the MPEG transport stream are separated and recombined into the audio stream 301 and the video stream 302, respectively. .

Referring to FIG. 4, packet identifiers are assigned to MPEG transport packets 41, 42, 43, 44, 45, 46, and 47 constituting the MPEG transport stream 400, respectively. Similarly, when the MPEG transport stream 400 is received, each packet in decoding is treated as one file in which packets having the same identifier are connected to each other. That is, as shown in FIG. 4, packets with packet identifier 1 are combined to form one stream 401 and packets with packet identifier 2 are combined to form another stream 402. Meanwhile, the PAT packet may be identified by assigning a specific packet identifier. In FIG. 4, the packet having the packet identifier 0 is a PAT packet. In the PAT packet, identifiers of the same number of PMT packets as the number of supported channels are recorded. For simplicity, one PAT packet is shown, but as described above, the number of PAT packets may be changed. Detailed description of the PAT packet and the PMT packet will be described later.

5 is a reference diagram for explaining an information storage medium on which an MPEG broadcast program is recorded by a recording apparatus according to the present invention.

Referring to FIG. 5, navigation data and MPEG broadcast programs # 1, # 2, ..., #n are recorded in the information storage medium.

MPEG broadcast programs # 1, # 2, ..., #n respectively indicate logical units of content recorded on the information storage medium. All of these can be called program sets. When playing a program, the presentation order is the same as the recorded order. However, when the program is edited, the presentation order may be changed.

The navigation data includes information necessary for recording, playing back or editing data on an information storage medium. For example, as navigation data, information on a program set, programs, entry points (playback start point), a play list, and the like can be given.

6 is an example for explaining the structure of a program defined through navigation data.

Referring to FIG. 6, PGCI (ProGram Chain Information) is a data structure for indicating PGC. ProGram Chain (PGC) refers to a chain of programs (parts of) corresponding to a playlist displayed to the user. The PGC can be divided into an original PGC that points to a program set consisting of a chain of programs and a user-defined PGC defined by a user and composed of a chain of parts of the programs.

A program consists of one or more cells. A cell is a data structure representing a part of a program. A cell existing in the original PGC is called an original cell, and a cell existing in the user defined PGC is called a user defined cell. A program included in a program set is composed of one or more original cells.                     

On the other hand, TOB (Transport OBject) refers to stream data obtained by recording MPEG TV programs in real time. The basic unit constituting the TOB is TOBU, which is composed of MPEG transport packets transmitted from a TV station. TOBU is a recording unit according to the present embodiment, and MPEG TV programs are recorded, reproduced and edited in TOBU units. TOBI is a data structure that tells information about the TOB. As shown in the figure, the TOBI defines a time map (TMAP). TMAP is a data table used to map the presentation time given in the TOB to the address of the TOBU. Thus, the cell indicates the start time and end time of the corresponding TOB of the TMAP, and the TMAP maps the address of the TOBU to be played during the presentation time defined by the start time and the end time.

The data structure of the TOB in this embodiment is consistent with "Information Technology-Generic coding of moving pictures and associated audio: Systems" (ISOIEC 13818-1). That is, one TOB includes a plurality of TOBUs. The TOBU includes a plurality of packs having a fixed size. Packs can be written into logical blocks defined in the DVD family if the size of the pack is the same as the logical block used in the DVD disc family. That is, it is compatible with the DVD family. The TOBU contains MPEG transport packets. MPEG transport packets consist of video data, audio data, or value-added user data.

7 is a pack structure diagram of a TOBU.

Referring to FIG. 7, the TOB is composed of at least one TOBU. The size of the TOBU can vary. Information about the size of the TOBU is included in the navigation data. The TOBU includes a header, a source packet, and padding. The source packet includes an MPEG transport packet. Padding refers to dummy data stuffed to adjust the size of the TOBU.

8 is an example in which a TOB is recorded.

Referring to FIG. 8, the TOB may be physically scattered and recorded to take advantage of recordable free space existing in the information storage medium. However, the TOB should be recorded within the scope of Contiguous Data Areas (CDAs) so that it can be read to ensure a smooth reproduction. CDA means physically contiguous sectors in an optical disc. The minimum length of the CDA and the data recording in the CDA depend on the ability of the playback apparatus to continuously play back.

9 is a data structure diagram of an information storage medium recorded according to the first embodiment of the present invention.

9, navigation data and MPEG TV programs # 1, # 2, ..., #n are recorded in the information storage medium. The navigation data includes a PAT table and a PMT table recorded according to this embodiment. Alternatively, the navigation data may include a PAT packet and a PMT packet. The programs # 1, # 2, ..., #n are recorded in units of TOBU as described above. On the other hand, PAT packets and PMT packets are included in the TOBU and recorded according to the order transmitted from the TV broadcasting stations. However, in the present embodiment, since the PAT table and the PMT table are recorded separately in the navigation data, the PAT packet and the PMT packet may not be included in the TOBU.

10 is a data structure diagram of navigation data including a PAT table and a PMT table according to the first embodiment of the present invention.

Referring to FIG. 10, the navigation data includes a volume manager table. The management table contains management information for a plurality of programs recorded on the entire information storage medium. The management table includes the general information volume gerneral information (VOL_GI) about the information storage medium, a pointer table PG_SRPT (Program search pointer table) indicating the location of program information, and a program information table PG_IT # (Program Information Table #) for each program. It includes.

The VOL_GI includes the number of program numbers PG_Ns (Program Numbers) recorded in the information storage medium. PG_SRPT informs the offset value PG_IT_SRP # (PG_IT Search Pointer #) of the program information table for the corresponding program from the start position of the management table. Therefore, the offset value PG_IT_SRP # exists as many as the number of corresponding programs.

The program information table PG_IT contains information necessary for playing the program. When the fields constituting the program information table PG_IT are sequentially described, PAT_SA indicates the offset value of the corresponding PAT table from the start position of PG_IT as the start address of the PAT table, and PMT_SA corresponds to the start position of PG_IT as the start address of the PMT table. Informs the offset value of the PMT table. TMAP_SA informs the offset value of the corresponding PAT table from the start position of PG_IT as the start address of TMAP. The PAT table has the same structure as the Program Association Table structure defined in the MPEG-2 standard. However, the PAT table may be modified and recorded in a structure in which only the information on the PMT packet for the corresponding program may be referred to. The PMT table has the same structure as the Program Map Table structure defined in the MPEG-2 standard. As mentioned above, TMAP is a table that maps time to location (address). The structure may be the same as, for example, the structure of a DVD-VR or a DVD-Streamer.

A method of recording an MPEG broadcast program based on the configuration of the first embodiment of the present invention will be described below.

11 is a flowchart for explaining a method for recording an MPEG broadcast program.

Referring to FIG. 11, a recording apparatus receives an MPEG transport stream constituting an MPEG broadcast program, and extracts and combines a PAT packet and a PMT packet among the received MPEG transport streams to record a PAT table and a PMT table. In step 1101, the data is recorded in the navigation data area. Here, the recording apparatus may record the PAT packet and the PMT packet instead of the PAT table and the PMT table. While recording with the PAT table and PMT table has the advantage of reducing the recording space, there is a hassle to recombine the PAT packet and PMT packet to playback and to deliver to the MPEG decoder. The opposite is true when recording with a PAT packet and a PMT packet. On the other hand, the recording apparatus extracts the MPEG transport packet constituting the program requested to be recorded from the user and records it in the program area (step 1102). Whether to record PAT packets and PMT packets together is optional. Steps 1101 and 1102 may be performed first with a time difference. Or simultaneously by time division techniques.

12 is a data structure diagram of a program recorded according to the second embodiment of the present invention.

Referring to FIG. 12, the TOB constituting the program according to the present embodiment includes a plurality of TOBUs. Each TOBU has a corresponding PAT packet and PMT packet at the front. In other words, MPEG transport packets included in the TOBU according to the present embodiment are not recorded in the order transmitted from the broadcast station. That is, in the TOBU according to the present embodiment, the corresponding PAT packet and PMT packet are located at the front. According to the MPEG standard, since the PAT packet and PMT packet do not have reproduction synchronization information attached and do not contain data buffered for reproduction, the PAT packet and PMT packet are stored in the TOBU differently from the reception sequence according to the MPEG transport stream. Even if it's at the front, it doesn't cause any problems when decoding. In this way, by placing the PAT packet and the PMT packet at the front of the TOBU, the playback apparatus knows the control information necessary for the reproduction in advance, so that all data packets to be decoded thereafter can be decoded and reproduced. In other words, it is possible to minimize the data discarded during decoding. Meanwhile, the PAT packet and the PMT packet may be recorded in a position where all of the data contained in the TOBU can be decoded and reproduced without discarding the data.

Here, the PAT packet is recorded as it is transmitted from a broadcasting station, that is, recorded to include information about PMT packets for all programs, or modified and recorded so as to refer only to information about PMT packets for the corresponding programs. Furthermore, each TOBU may include all or at least some of the corresponding PAT packet and PMT packet repeatedly transmitted from the broadcasting station in addition to the PAT packet and PMT packet located at the front.

13 is a block diagram of a playback apparatus according to an embodiment of the present invention.

Referring to FIG. 13, the playback apparatus includes a reader 130, a controller 131, and a decoder 132. The reading unit 130 reads data from the information storage medium 1300 in which the MPEG broadcast program is recorded according to the present invention. The decoder 132 decodes the data read from the reader 130 (132). The control unit 131 outputs a control command to the reading unit 130 to read a program requested from the user and necessary navigation data, and interprets the navigation data provided from the reading unit 130 to read necessary information from the reading unit 130 or the like. Provided to the decoder 132. As described above, when the PAT table and the PMT table are recorded in the navigation data, the control unit 131 recombines information necessary for reproduction into the PAT packet and the PMT packet and delivers the information to the decoder 132.

In addition, the controller 131 checks how many programs are stored in the entire information storage medium by referring to the PG_Ns field of the management table described with reference to FIG. 10, and then refers to the PMT table to provide summary information about each program (title And the information of the recorded time, etc. are extracted to compose a menu screen. The type of information to be included in the menu screen may be variously selected and configured. The user selects any one of the plurality of programs displayed on the menu screen. The program selection information of the user is transmitted to the controller 131.

14 is a flowchart for explaining a playback method according to the first embodiment of the present invention.

Referring to FIG. 14, the control unit 131 refers to the PAT table and the PMT table of the program from the management table, reassembles the PAT packet and the PMT packet, and transfers the PAT packet and the PMT packet to the decoder 132 (step 1401). If it is recorded as a PAT packet and a PMT packet, it is sufficient to read it out and deliver it as it is. The decoder 132 decodes the received PAT packet and PMT packet and obtains information necessary for reproduction. Accordingly, the decoder 132 can receive and decode MPEG transport packets constituting the program. On the other hand, the control unit 131 extracts the location information recorded with the corresponding program from the management table and provides it to the reading unit 130, and the reading unit 130 reads the corresponding MPEG transport packets (step 1402), the decoder 132 (Step 1403). Accordingly, the decoder 132 may decode the inputted MPEG transport packets without time delay or discarded data.

15 is a flowchart for explaining a playback method according to the second embodiment of the present invention.

Referring to FIG. 15, the controller 131 provides the position information in which the corresponding program is recorded to the reader 130, and the reader 130 reads the TOBU in the order of recording (step 1501), and the decoder 132. In step 1502. Accordingly, the decoder 132 decodes the input MPEG transport packet based on the PAT packet and the PMT packet located in front of the TOBU.

The method of recording the broadcast program can be written as a computer program. Codes and code segments constituting the program can be easily inferred by a computer programmer in the art. The program is also stored in a computer readable media, which is read and executed by a computer to implement the MPEG broadcast program recording method. The information storage medium includes a magnetic recording medium, an optical recording medium, and a carrier wave medium.

As described above, according to the present invention, in receiving and recording a broadcast program, a packet including control information for recording / reproducing is recorded in a separately formed navigation data area or recorded so as to be located at the beginning of a predetermined logical recording unit. Thus, no matter how long playback starts at any point in the recorded program, there is no delay and playback is possible without discarded packets.

Claims (37)

In the method for recording a broadcast program on an information storage medium, (a) extracting from the digital broadcast stream a first information packet indicating an identifier of packets in which identifiers of data packets constituting at least one broadcast program are recorded; (b) extracting a second information packet informing of identifiers of data packets constituting the broadcast program based on the first information packet; (c) recording the first information packet and the second information packet in a navigation data area; And and (d) extracting data packets constituting the broadcast program based on the information packet and recording the extracted data packets in a program area formed separately from the navigation area. delete The method of claim 1, And when the digital broadcast stream is an MPEG transport stream, the first information packet is a PAT packet, and the second information packet is a PMT packet. The method of claim 3, Step (c) is (c1) generating a PAT table and a PMT table by combining the extracted PAT packets and PMT packets; And (c2) recording the generated PAT table and PMT table in a navigation data area. The method of claim 4, wherein Step (c1) is And generating information about the PMT packet of the corresponding program from the PAT packet and generating information about the remaining PMT packet. The method of claim 4, wherein Step (c2) is And recording the generated PAT table and the corresponding PMT table in a program information table in which information necessary for reproducing each program is recorded. The method of claim 6, And the program information table is included in a management table containing management information about a plurality of programs recorded on the entire information storage medium. The method of claim 7, wherein The management table further comprises a pointer table for indicating the general information about the information storage medium, the location of the program information table. The method of claim 8, The general information includes the total number of programs, and the pointer table includes an offset value of a program information table for a corresponding program from a start position of the management table. The method of claim 6, The program information table includes a start address of the PAT table and a start address of the PMT table. The method of claim 10, And the PAT table has the same structure as the Program Association Table structure defined in the MPEG-2 standard. The method of claim 11, And the PMT table has the same structure as the Program Map Table structure defined in the MPEG-2 standard. The method of claim 1, The step (b) is characterized in that the recording step with the information packet in the order in which the packets are received. delete An apparatus for receiving a broadcast program and recording in an information storage medium, An identifier of a data packet constituting the broadcast program based on the first information packet and the first information packet indicating an identifier of packets in which the identifiers of the data packets constituting at least one broadcast program are recorded from the digital broadcast stream. A filter unit for extracting a second information packet for indicating a and a data packet constituting the broadcast program: A control unit providing an identifier of a data packet constituting the broadcast program to the filter unit based on the first information packet and the second information packet; And Receives a data packet from the filter unit and records the data packet in an area of a program of the information storage medium, receives a first information packet and a second information packet from the control unit, and navigation data of the information storage medium formed separately from the program area. And a recording unit for recording in the area. The method of claim 15, And when the digital broadcast stream is an MPEG transport stream, the first information packet is a PAT packet and the second information packet is a PMT packet. The method of claim 16, The control unit combines the PAT packet and the PMT packet filtered by the filter unit to form a PAT table and a PMT table, finds identifiers of the data packets from the configured PAT table and PMT table, and delivers the identifiers to the filter unit. And the PAT table and the PMT table are recorded in the navigation data area of the recording unit. An apparatus for receiving an MPEG broadcast program and recording the information on an information storage medium, A filter unit for filtering a PAT packet and a PMT packet from an MPEG transport stream and filtering data packets constituting the MPEG broadcast program; A control unit which finds an identifier of the data packets from the filtered PAT packet and the PMT packet and delivers the identifiers to the filter unit; And And a recording unit which collects the data packets transferred from the filter unit and records them in a predetermined recording unit (TOBU) so that the corresponding PAT packet and PMT packet provided from the control unit are positioned in front of the recording unit (TOBU). Recording device. The method according to any one of claims 16 to 18, The filter unit A PAT filter for filtering PAT packets; A PMT filter array for filtering PMT packets; And And a target packet filter array for filtering data packets constituting a target program to be recorded. The method according to any one of claims 16 to 18, The control unit A PAT assembler for generating a PAT table by combining the PAT packets provided from the PAT filter; A PMT assembler for generating a PMT table by combining the PMT packets provided from the PMT filter array; And And a main controller for retrieving packet identifiers of data packets constituting the selected program from the PMT table and providing the packet packet array to the target packet filter array, and providing the corresponding PAT table and the PMT table to the recording unit. The method according to any one of claims 16 to 18, The control unit A PAT assembler for generating a PAT table by combining the PAT packets provided from the PAT filter; A PMT assembler for generating a PMT table by combining the PMT packets provided from the PMT filter array; And The main controller obtains the packet identifiers of the data packets constituting the selected program from the PMT table and provides them to the target packet filter array, recombines the PAT packets and PMT packets to the recording unit by referring to the corresponding PAT table and PMT table. Recording apparatus comprising a. The method according to any one of claims 16 to 18, The control unit A PAT assembler for generating a PAT table by combining the PAT packets provided from the PAT filter; A PMT assembler for generating a PMT table by combining the PMT packets provided from the PMT filter array; And Packet identifiers of data packets constituting the selected program are obtained from the PMT table and provided to the target packet filter array, and the PAT assembler and the PMT assembler are controlled to provide the corresponding PAT packet and PMT packet to the recording unit. Recording apparatus comprising a controller. The method of claim 18, And a first buffer for buffering the remaining packets passing through the PAT filter. The PAT filter provides the filtered PAT packet to the PAT assembler, The PAT assembler provides packet identifiers of PMT packets to be filtered with reference to the PAT table to the PMT filter array, And the PMT filter array receives the remaining packets from the first buffer and filters the PMT packets having the packet identifier received from the PAT assembler to provide them to the PMT assembler. The method of claim 23, wherein And a second buffer for buffering the remaining packets passing through the PMT filter array. The target packet filter array receives the remaining packets from the second buffer when the packet identifiers of the data packets constituting the selected program are received from the main controller, and filters the corresponding data packets to provide them to the recording unit. . An information storage medium in which a broadcast program is recorded, A program area in which data packets are extracted and recorded from the broadcast program; And Configuring the broadcast program based on the recorded first information packet and the first information packet in which the identifiers of the packets in which the identifiers of the data packets constituting the at least one broadcast program extracted from the digital broadcasting system are recorded. And a navigation data area in which an identifier of the data packet is extracted and recorded, in which the second information packet is recorded. delete The method of claim 25, When the digital broadcast stream is an MPEG transport stream, the first information packet is a PAT packet, the second information packet is a PMT packet, And a PAT table and a PMT table generated by combining the PAT packet and PMT packet in the navigation data area. The method of claim 25 or 27, The information storage medium, characterized in that the PAT table includes only information on the PMT packet for the program among the information contained in the PAT packet. The method of claim 25 or 27, And the PAT table is included in a recorded program information table for reproducing all recorded programs. The method of claim 25 or 27, The program information table is an information storage medium, characterized in that included in the management table containing the management information for all the plurality of recorded programs. The method of claim 30, The management table further comprises a pointer table for indicating the general information about the information storage medium, the location of the program information table. The method of claim 31, wherein The general information includes the total number of programs, and the pointer table includes an offset value of a program information table for a corresponding program from a start position of the management table. 33. The method of claim 32, The program information table includes a start address of the PAT table and a start address of the PMT table. The method of claim 33, wherein The PAT table has the same structure as the Program Association Table structure defined in the MPEG-2 standard. The method of claim 34, wherein The PMT table has the same structure as the Program Map Table structure defined in the MPEG-2 standard. A recording medium having recorded thereon computer readable program code for implementing a method of recording a broadcast program on an information storage medium, Extracting a first information packet indicating an identifier of packets in which identifiers of data packets constituting at least one broadcast program, respectively, are recorded from the digital broadcast stream; and based on the first information packet, Extracting a second information packet indicative of identifiers of data packets constituting the first information code, and writing the first information packet and the second information packet in a navigation data area; And And a second program for extracting data packets constituting the broadcast program based on the information packet and recording the data packets in a program area formed separately from the navigation area. delete

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