KR101218402B1 - Method and apparatus for transmitting/receiving broadcasting program id - Google Patents

Abstract

The present invention relates to a method and apparatus for transmitting and receiving broadcast program identification information. The broadcast program transmitting method of the present invention comprises the steps of: obtaining an audio / video bitstream for at least one broadcast program; Acquiring broadcast program identification information corresponding to the broadcast program; Encrypting the obtained audio / video bitstream; Generating a media file comprising metadata and the encrypted audio / video bitstream; And transmitting the generated media file, wherein the metadata includes the obtained broadcast program identification information and reference information about the audio / video bitstream. According to the present invention, the identification information of the broadcast program can be easily obtained and used without analyzing the broadcast program itself included in the file as an audio / video stream.

Broadcast programs, identification information, metadata, MPEG

Description

Method and apparatus for transmitting and receiving broadcast program identification information {METHOD AND APPARATUS FOR TRANSMITTING / RECEIVING BROADCASTING PROGRAM ID}

The present invention relates to a method and apparatus for transmitting and receiving broadcast program identification information, and more particularly, to a method and apparatus for transmitting and receiving broadcast program identification information for identifying a broadcast program with a broadcast program.

The present invention is derived from a study conducted as part of the IT growth engine technology development project of the Ministry of Knowledge Economy [Task management number: 2007-S-003-02, Title: Development of terrestrial DTV broadcasting program protection technology].

Recently, with the development of communication technology, a service for distributing broadcast programs has attracted attention. Such broadcast programs are currently distributed in various forms. For example, a type of providing a replay service for a broadcast, a type of operating a broadcast distribution server for a broadcast service provider to sell a broadcast program through the Internet, and such a broadcast program distribution service is currently commercialized. have. One of the things that will be discussed as a possible broadcast program distribution service.If a part of the program is shown to the viewer as a 'preview' service, and the viewer wants to continue watching the program, 'review' or ' There is a service that provides download. In addition, recently, as a plan for activating the distribution of broadcast programs, a method of sharing distribution revenues with copyright holders and viewers by discussing and circulating broadcast programs by viewers watching the broadcast programs has been discussed.

Currently, commercial terrestrial broadcasting service provides high quality broadcasting programs to viewers free of charge, and guarantees the recording and private use of broadcasting by viewers. Recently, however, there has been an increase in the number of illegally distributed broadcast programs through web hard or P2P without any protective measures. In particular, terrestrial broadcast programs broadcast digitally are distributed through web hard immediately after the program is broadcast. Appearing. Accordingly, various studies are being conducted on broadcast program protection technology to prevent illegal copying and distribution of broadcast programs and to protect the rights of copyright holders.

In order to prevent illegal distribution of broadcast programs, it is important to protect broadcast programs from illegal use, but it is also important to provide a method for acquiring and watching broadcast programs in a legal manner. To this end, broadcast program distribution through a communication network should be activated, and broadcast program identification information for uniquely identifying a broadcast program is required for broadcast program distribution.

An object of the present invention is to provide a method and apparatus for transmitting and receiving broadcast program identification information that facilitates identification and management of a broadcast program and activates distribution of broadcast programs by transmitting and receiving broadcast program identification information together with a broadcast program. have.

In addition, the present invention provides a method and apparatus for transmitting and receiving broadcast program identification information to easily obtain and use the identification information of the broadcast program without interpreting the broadcast program itself included in the file as an audio / video stream. There is another purpose.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a method of transmitting a broadcast program, comprising: obtaining an audio / video bitstream for at least one broadcast program; Acquiring broadcast program identification information corresponding to the broadcast program; Encrypting the obtained audio / video bitstream; Generating a media file comprising metadata and the encrypted audio / video bitstream; And transmitting the generated media file, wherein the metadata includes the obtained broadcast program identification information and reference information about the audio / video bitstream.

In addition, the present invention provides a method for receiving a broadcast program, comprising: receiving a media file including audio / video bitstream and metadata for one or more broadcast programs; Analyzing the media file to obtain the metadata; Acquiring broadcast program identification information of the broadcast program included in the metadata; And acquiring viewing authority for the broadcast program using the broadcast program identification information, wherein the metadata includes reference information for the audio / video bitstream.

In addition, the present invention provides a broadcast program transmitting apparatus, comprising: a bitstream management unit for obtaining an audio / video bitstream for at least one broadcast program and encrypting the obtained audio / video bitstream; An identification information management unit for obtaining broadcast program identification information corresponding to the broadcast program; A media file generator for generating a media file including metadata and the encrypted audio / video bitstream; And a transmitter for transmitting the generated media file, wherein the metadata includes the obtained broadcast program identification information and reference information about the audio / video bitstream.

In addition, the present invention provides a broadcast program receiving apparatus, comprising: a receiver for receiving a media file including audio / video bitstream and metadata for one or more broadcast programs; A media file analyzer configured to analyze the media file to obtain the metadata; And an identification information manager configured to obtain broadcast program identification information of the broadcast program, included in the metadata, and obtain viewing authority for the broadcast program using the obtained broadcast program identification information. Data includes reference information for the audio / video bitstream.

According to the present invention as described above, by transmitting and receiving the broadcast program identification information with the broadcast program, it is easy to identify and manage the broadcast program, there is an advantage that can activate the distribution of the broadcast program.

In addition, according to the present invention, there is an advantage that the identification information of the broadcast program can be easily obtained and used without interpreting the broadcast program itself included in the file as an audio / video stream.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, whereby those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

1 is a configuration diagram of an embodiment of a broadcast program distribution service network to which a broadcast program transmission and reception method according to the present invention can be applied.

As shown in FIG. 1, the program distribution service network includes a broadcast program sender 102 for distributing a broadcast program, a broadcast program receiver 104 and 106 for receiving and watching a broadcast program from the broadcast program sender 102, and distribution. It may be configured as a broadcast management server 108 for managing the viewing authority for the broadcast program.

The broadcast program transmitter 102 distributes a broadcast program broadcast through a terrestrial TV or cable TV. The broadcast program sender 102 may be a general broadcast service provider or a viewer watching a broadcast. First, a broadcast service provider may provide a replay service for an already broadcast program. Such a review service may be provided through a broadcast service such as cable broadcasting, satellite broadcasting, mobile mobile broadcasting, video on demand (VOD), IPTV, or a distribution network such as the Internet.

Recently, as a plan for activating the distribution of broadcast programs, a service is provided in which viewers who watch a broadcast program record a broadcast program and distribute the broadcast program to share copyrights with viewers. Therefore, when the broadcast program sender 102 is a viewer, the broadcast program sender 102 records or stores a desired program by using a broadcast receiving terminal having a recording / storing function, and then uses the program on the Internet or other storage media. Can be distributed.

The broadcast program transmitter 102 distributes a broadcast program using a broadcast network or an internet network. In order to prevent illegal distribution, the broadcast program is distributed in an encrypted form. Recipients 104 and 106 who have received the encrypted broadcast program should acquire the right to view the program, and broadcast program receivers 104 and 106 who have obtained the right to view the program can view the program through a decryption process. . As shown in FIG. 1, the broadcast program receivers 104 and 106 may receive and watch a broadcast program using a portable multimedia player (PMP) 104, a personal computer 106, and various other terminals.

The broadcast management server 108 receives a request for issuance of viewing authority from the broadcast receiver 104 and 106 and issues a viewing authority. Broadcast program receivers 104 and 106 who want to watch the received broadcast program access the broadcast management server 108 and request for issuing a viewing authority for the corresponding program. The broadcast program management server 108 performs an authentication procedure, a charging procedure, and the like for the broadcast program receivers 104 and 106 that have requested the issuance of the viewing authority, and then provides the broadcast program receivers 104 and 106 with the viewing authority for the corresponding program. Issue.

In order to provide the broadcast program distribution service described with reference to FIG. 1, the broadcast program to be distributed needs to be uniquely identified and managed. In order to identify a broadcast program, the following items should be clearly defined in broadcast program identification information.

-Broadcasting company broadcasting the program

-Program code assigned by the broadcasting company to the program

-Validity period of the program code assigned to the program

In order to provide such a program identification information and a broadcast program distribution service, standardization of broadcast program identification information is being progressed. ATSC A / 57, one of the specifications for program identification information, is a standard for uniquely identifying contents (including broadcast programs). In May 2008, revision B (revision B) was completed. The structure of ATSC_content_identifier defined in ATSC A / 57B standard is shown in Table 1.

The meaning of each field shown in Table 1 is as follows.

TSID: has a value of transport_stream_id defined in ATSC A / 65 (PSIP standard).

end_of_day: A field indicating the end of the day based on UTC (Universal Time Coordinated), which represents a time from 0 to 23. When the 'house number' defined in the unique_for field below is valid, the time specified in end_of_day is defined as the end of the date, not the time indicating the physical date.

unique_for: indicates a period during which content_id should be managed uniquely, that is, a period during which content_id should not be reused. The unit is 'day'. The use of '0' is prohibited, and '511' means 'infinitely'.

content_id: A field indicating an ID value, the length of which should not exceed 242 bytes.

Meanwhile, domestic standardization of a method of inserting broadcast program identification information into a terrestrial DTV broadcast signal and transmitting it is in progress. According to the domestic standard, broadcast program identification information is included in the content_id of ATSC_content_identifier shown in Table 1 and transmitted. Table 2 shows the content_id defined in the current national standard.

The meaning of each field shown in Table 2 is as follows.

major_channel_number, minor_channel_number: Virtual channel information through which a broadcast program is transmitted. The channel information in the program identification information must match the channel information in the PSIP.

-onair_time: Start time of broadcasting program

length_of_program_code: Length of program code (program_code)

-program_code: Program's own code managed by each broadcaster

As shown in Table 1 and Table 2, content_id includes a program itself code (program_code) used by each broadcaster, and content_id is again included in ATSC_content_identifier. The ATSC_content_identifier is inserted into the 'conctent_labeling_descriptor' defined in the MPEG-2 System (ISO / IEC 13818-1: 2007) standard and transmitted.

In the current national standard, content_id shown in Table 2 is referred to as 'broadcast program ID' (or broadcast program identification information). However, the term 'broadcast program identification information' used in the present invention means identification information for uniquely identifying a broadcast program, and is used as a concept including not only content_id defined by a national standard but also ATSC_content_identifier according to the ATSC standard. do.

The ATSC standard and the domestic standard proposed through Table 1 and Table 2 are standards for inserting and transmitting broadcast program identification information into broadcast signals. More specifically, insert broadcast program identification information into MPEG-2 TS streams. This is a standard for specification. These standards do not define standards for the storage of broadcast programs.

On the other hand, one of the standards for storing broadcast programs in the form of a file is the ISO Base Media File Format (ISO Base Media File Format). According to this standard, a broadcast program can be stored as an MPEG-2 TS, and system information such as a program association table (PAT) or a program map table (PMT) can be stored separately along with the MPEG-2 TS. However, this standard does not define how to effectively store program identification information.

After all, in order to support an application service that stores and reuses a broadcast program such as a distribution service of the broadcast program described with reference to FIG. 1, by storing broadcast program identification information separately from an audio / video stream such as an MPEG-2 TS stream, What is needed is a way to identify a broadcast program without directly interpreting the audio / video stream.

Accordingly, the present invention provides a method of effectively storing broadcast program identification information for uniquely identifying a broadcast program in a broadcast program distribution service in which a broadcast program is stored in a file form and then delivered to a viewer. . Through this method, broadcast program identification information can be easily extracted and used without directly interpreting a broadcast program itself included in a file as an MPEG-2 TS stream.

2 is a block diagram of a broadcast program transmitting apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the broadcast program transmitting device 202 includes a bitstream managing unit 204, an identification information managing unit 206, a media file generating unit 208, and a transmitting unit 210.

The bitstream manager 204 acquires an audio / video bitstream for at least one broadcast program. The audio / video bitstream may be configured in an MPEG stream format such as MPEG-2 TS. In addition, the broadcast program may be directly provided by a broadcaster that provides a broadcast service, or may be recorded or stored directly by a viewer through a terminal. Meanwhile, the bitstream manager 204 may also encrypt the obtained audio / video stream.

The identification information manager 206 serves to obtain broadcast program identification information corresponding to the broadcast program. The broadcast program identification information is for uniquely identifying the broadcast program, and may be stored in various forms such as binary or text. The broadcast program identification information may include information on the validity period of the broadcast program identification information, virtual channel information on which the broadcast program is transmitted, transmission time information of the broadcast program, broadcast program code information on the broadcast program, and the like.

The media file generator 208 generates a media file including the audio / video bitstream and the metadata obtained by the bitstream manager 204. Here, the media file may be generated according to the ISO base media file format. The metadata also includes broadcast program identification information and reference information for the audio / video bitstream. Since the program identification information is included in the metadata, the program identification information is eventually stored and managed separately from the audio / video bitstream.

The transmitter 210 serves to transmit the media file generated by the media file generator 208.

3 is a block diagram of a broadcast program receiving apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the broadcast program receiving apparatus 302 includes a receiver 304, a media file analyzer 306, and an identification information manager 308.

The receiver 304 serves to receive a media file including audio / video bitstreams and metadata for one or more broadcast programs. Here, the media file may be generated according to the ISO base media file format.

The media file analyzer 306 analyzes the media file received by the receiver 304 to obtain metadata. Here, the metadata includes broadcast program identification information and reference information about the audio / video bitstream.

The identification information manager 308 acquires broadcast program identification information included in the obtained metadata. The broadcast program identification information may include information on the validity period of the broadcast program identification information, virtual channel information on which the broadcast program is transmitted, transmission time information of the broadcast program, broadcast program code information on the broadcast program, and the like. In addition, the identification information management unit 308 obtains the viewing authority for the broadcast program using the obtained broadcast program identification information.

Based on the contents described so far, the following describes a method of storing broadcast program identification information according to a preferred embodiment of the present invention.

According to the prior art, since the MPEG-2 TS stream for a broadcast program includes broadcast program identification information, the file storing the MPEG-2 TS stream also includes broadcast program identification information. However, when the program identification information is included in the MPEG-2 TS, a problem arises in that the program identification information must be extracted by parsing the MPEG-2 TS stream whenever the program identification information is needed. In particular, when the MPEG-2 TS stream is encrypted and stored for copyright protection, a decoding process for extracting broadcast program identification information is required separately, which may be a problem in terms of broadcast program protection. In order to solve this problem, when storing a broadcast program, easy acquisition of broadcast program identification information should be considered.

Therefore, the program identification information is preferably stored and managed separately in the metadata related to the MPEG-2 TS stream rather than in the MPEG-2 TS stream. Also, since the program identification information includes program_code that is changed according to a broadcast program, when the MPEG-2 TS stream stored in one file includes several broadcast programs, the broadcast corresponding to each broadcast program is provided. Several program identification information must also be stored.

Based on the above description, the requirements related to the storage of program identification information can be largely summarized as follows.

1) Broadcasting program identification information and information included in it should be managed separately for easy extraction in a file.

2) The program identification information should be able to easily extract which part of the MPEG-2 TS stream stored in the file.

A storage method that satisfies the above two requirements is a method of defining and storing a box that can store program identification information in a sample entry of a Precoumputed Hint Track of MPEG-2 TS. have. Hereinafter, a method of storing broadcast program identification information using Precomputed Hint Track according to an embodiment of the present invention will be described.

The ISO Base Media File Format is a standard for the storage format of MPEG-2 TS. The first of the storage formats mentioned in the ISO Base Media File Format is to store the media streams (audio / video streams) that make up MPEG-2 TS in separate media tracks, and the MPEG-2 TS for Hint Track. A method of storing data (TS header, adaptation field, etc.) necessary for generation. For this method, the hint track must reference the media track.

The second method is to store the MPEG-2 TS in the hint track as it is. This method is called 'precomputed hint track'. This method enables the use of MPEG-2 TS saved as a separate file and provides a simple recording function. In particular, when the MPEG-2 TS stream is encrypted for broadcast program protection, the precomputed hint track is used because it is impossible to separate the media stream from the MPEG-2 TS stream. When distributing a broadcast program, it is common to store the broadcast program in an encrypted state so that only a user or a device that has acquired the viewing authority for the broadcast program can play the program. Therefore, it is common to store MPEG-2 TS as a precomputed hint track for distribution of broadcast programs.

Precomputed hint tracks are part of the ISO / IEC 14496-12 standard, an open standard that is already known to those in the field. Therefore, in the present invention, the precomputed hint track will be briefly described for the sake of clarity and will not be described in detail.

The sample format of the precomputed hint track includes MPEG-2 TS packets including 'precedingbytes' and 'trailingbytes', as shown in Table 3.

Meanwhile, the sample description format of the precomputed hint track is designed to store all the static metadata describing the stream or a part of the static metadata including the PSI / SI table. A sample entry (MPEG2TSSampleEntry) based on the contents defined in the sample description format is shown in Table 4.

As shown in Table 4, a Sample entry is made for the purpose of storing metadata describing the characteristics of the stored stream. In the current ISO base media file format, boxes such as 'tPAT' and 'tPMT' are used to make it easier to extract system information on MPEG-2 TS streams by storing and managing system information on stored MPEG-2 TS streams separately. It is defined. These boxes may be located in the 'additionaldata' field of the sample entry of Table 4. Therefore, if you define a new box that can be placed in the 'additionaldata' field and store the program identification information in this new box, the first of the requirements related to the storage of the program identification information mentioned above can be satisfied. have.

On the other hand, when several broadcast programs are stored in one MPEG-2 TS stream, it is necessary to store broadcast program identification information corresponding to each broadcast program. Since the ISO / IEC 14496-12 standard stipulates that a new sample entry be added whenever there is a change in the stored metadata, it is possible to add a new sample entry in accordance with the change of program identification information. A new chunk is stored at the location of the MPEG-2 TS stream corresponding to the new sample entry. The sample entry associated with the new chunk is specified via 'sample_description_index' of the sample to chunk box. Therefore, when storing several broadcasts in one MPEG-2 TS stream, it is easy to know which part of the MPEG-2 TS stream is associated with program identification information. Accordingly, the second requirement among the requirements related to the storage of broadcast program identification information may be satisfied.

Based on the above, ATSC_content_identifier and content_id mentioned above can be configured into a box included in the sample entry. Tables 5 and 6 show ATSC_content_identifier and content_id represented by boxes, respectively.

Each box structure shown in Tables 5 and 6 includes the fields shown in ATSC_content_identifier and content_id shown in Tables 1 and 2 as they are. Therefore, the meaning of each field is also as described through Table 1 and Table 2. Meanwhile, the content_id_box field shown in Table 5 contains 'prid', which is a box for content_id defined in Table 6.

In addition to the method of storing the sample entry box described above, the program identification information may be stored in various ways such as XML or binary storage in the 'meta' box, and binary storage in the sample entry. .

4 is a flowchart illustrating a transmission process of broadcast program identification information according to an embodiment of the present invention.

First, an audio / video bitstream for one or more broadcast programs is obtained (S402). The audio / video bitstream may be configured in an MPEG stream format such as MPEG-2 TS. In addition, the broadcast program may be directly provided by a broadcaster that provides a broadcast service, or may be recorded or stored directly by a viewer through a terminal.

Then, broadcast program identification information corresponding to the broadcast program is obtained (S404). The broadcast program identification information is for uniquely identifying the broadcast program, and may be stored in various forms such as binary or text. The broadcast program identification information may include information on the validity period of the broadcast program identification information, virtual channel information on which the broadcast program is transmitted, transmission time information of the broadcast program, broadcast program code information on the broadcast program, and the like.

Next, a media file including the obtained audio / video bitstream and metadata is generated (S406). Here, the media file may be generated according to the ISO base media file format. The metadata also includes broadcast program identification information and reference information for the audio / video bitstream. Since the program identification information is included in the metadata, the program identification information is eventually stored and managed separately from the audio / video bitstream. Finally, the generated media file is transmitted (S408).

Although not shown in FIG. 4, before or during the generation of the media file, an encryption process for the audio / video bitstream may be performed. This is to allow the viewing of the broadcast program only to the recipient with the viewing authority. Even if the encryption process is performed in this way, since the program identification information is included in metadata separate from the audio / video bitstream, the receiver can easily identify the program identification information regardless of whether the audio / video bitstream is encrypted. Can be obtained.

5 is a flowchart illustrating a process of receiving broadcast program identification information according to an embodiment of the present invention.

First, a media file including audio / video bitstreams and metadata for one or more broadcast programs is received (S502). Here, the media file may be generated according to the ISO base media file format.

Then, the received media file is analyzed to obtain metadata (S504). Here, the metadata includes reference information on the audio / video bitstream.

After acquiring the metadata, program identification information included in the acquired metadata is obtained (S506). The broadcast program identification information may include information on the validity period of the broadcast program identification information, virtual channel information on which the broadcast program is transmitted, transmission time information of the broadcast program, broadcast program code information on the broadcast program, and the like.

Finally, the viewing authority for the broadcast program is obtained using the obtained broadcast program identification information (S508). When the viewing authority is acquired, the authentication or charging process may be performed together. If the audio / video bitstream is transmitted in an encrypted state, the process of decrypting the encrypted audio / video bitstream using the acquired broadcasting program identification information or viewing authority may be further performed.

According to the present invention described so far, by transmitting and receiving broadcast program identification information together with the broadcast program, there is an advantage of facilitating identification and management of the broadcast program and activating distribution of the broadcast program.

In addition, according to the present invention, there is an advantage that the identification information of the broadcast program can be easily obtained and used without interpreting the broadcast program itself included in the file as an audio / video stream.

The method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily deduced by a computer programmer in the field. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. And the recording medium includes all types of recording media (intangible medium such as a carrier wave as well as tangible media such as CD and DVD) readable by a computer.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

1 is a configuration diagram of an embodiment of a broadcast program distribution service network to which a broadcast program transmission and reception method according to the present invention can be applied.

2 is a block diagram of a broadcast program transmitting apparatus according to an embodiment of the present invention.

3 is a block diagram of a broadcast program receiving apparatus according to an embodiment of the present invention.

4 is a flowchart illustrating a process of transmitting broadcast program identification information according to an embodiment of the present invention.

5 is a flowchart illustrating a process of receiving broadcast program identification information according to an embodiment of the present invention.

Claims (18)

Obtaining an audio / video bitstream for at least one broadcast program; Acquiring broadcast program identification information corresponding to the broadcast program; Encrypting the obtained audio / video bitstream; Generating a media file comprising metadata and the encrypted audio / video bitstream; And Transmitting the generated media file; The metadata includes the obtained broadcast program identification information and reference information for the audio / video bitstream. The method of claim 1, The broadcast program identification information, And at least one of valid period information of the broadcast program identification information, virtual channel information through which the broadcast program is transmitted, transmission time information of the broadcast program, and broadcast program code information for the broadcast program. The method of claim 1, The media file, And an audio / video bitstream and metadata included in an ISO Base Media File Format, and generated according to an MPEG stream format. The method of claim 1, The metadata, In the sample entry format of MPEG-2 TS (Transport Stream), The broadcast program identification information, And a program form included in a box form of the sample entry. The method of claim 1, The broadcast program identification information, A broadcast program transmission method, which is stored in either binary or text format. delete Receiving a media file including audio / video bitstream and metadata for at least one broadcast program; Analyzing the media file to obtain the metadata; Acquiring broadcast program identification information of the broadcast program included in the metadata; And Obtaining viewing authority for the broadcast program using the broadcast program identification information; Wherein the metadata includes reference information for the audio / video bitstream. 8. The method of claim 7, The broadcast program identification information, And at least one of valid period information of the broadcast program identification information, virtual channel information through which the broadcast program is transmitted, transmission time information of the broadcast program, and broadcast program code information for the broadcast program. delete A bitstream manager to obtain an audio / video bitstream for at least one broadcast program and to encrypt the obtained audio / video bitstream; An identification information management unit for obtaining broadcast program identification information corresponding to the broadcast program; A media file generator for generating a media file including metadata and the encrypted audio / video bitstream; And A transmission unit for transmitting the generated media file, And the metadata includes the obtained broadcast program identification information and reference information for the audio / video bitstream. The method of claim 10, The broadcast program identification information, And at least one of valid period information of the broadcast program identification information, virtual channel information through which the broadcast program is transmitted, transmission time information of the broadcast program, and broadcast program code information for the broadcast program. The method of claim 10, The media file, And an audio / video bitstream and metadata included in an ISO Base Media File Format, and generated according to an MPEG stream format. The method of claim 10, The metadata, In the sample entry format of MPEG-2 TS (Transport Stream), The broadcast program identification information, And a broadcast program transmitting device included in a box form of the sample entry. The method of claim 10, The broadcast program identification information, Broadcast program transmitting apparatus is stored in any one form of binary or text. delete A receiver for receiving a media file including audio / video bitstreams and metadata for at least one broadcast program; A media file analyzer configured to analyze the media file to obtain the metadata; And An identification information management unit for acquiring broadcast program identification information of the broadcast program included in the metadata, and obtaining viewing authority for the broadcast program using the obtained broadcast program identification information; And the metadata includes reference information for the audio / video bitstream. 17. The method of claim 16, The broadcast program identification information, And at least one of valid period information of the broadcast program identification information, virtual channel information through which the broadcast program is transmitted, transmission time information of the broadcast program, and broadcast program code information for the broadcast program. delete

Images