KR20030061599A - Apparatus and method for controlling data broadcasting server - Google Patents

Abstract

PURPOSE: A system and method for controlling a data broadcasting server are provided to satisfy various types of data items defined by a data broadcasting standard and offer interactive data broadcasting services. CONSTITUTION: A system(108) for controlling a data broadcasting server includes a user input/output unit(21), a schedule manager(24), a controller(23), and a meta data transmitter(22). The user input/output unit receives broadcasting program schedule information and additional data information through an interface and monitors the operation state of the data broadcasting server. The schedule manager stores and manages the broadcasting program schedule information. The controller controls capsulation of additional data, insertion of the additional data, and generation of program specific information/program and system information protocol/service description frame work table according to schedule information of the schedule manager. The meta data transmitter generates and stores meta data according to the additional data information of the user input/output unit and transmits the meta data according to a control signal of the controller.

Description

Apparatus and method for controlling data broadcasting server

The present invention relates to an apparatus for controlling a data broadcast server, a method thereof, and a computer-readable recording medium recording a program for realizing the method, and particularly, in an ATSC (Advanced Television Systems Committee) based digital terrestrial data broadcasting transmission system. A data broadcasting server control apparatus for controlling a module having data encapsulation and multiplexing functions, and a method thereof and a computer-readable recording medium having recorded thereon a program for realizing the method.

The conventional ATSC-based transmission system for digital terrestrial data broadcasting service has a problem in that each broadcaster has its own system structure and functions, so there is no mutual compatibility between data broadcasting transmission system modules.

In order to solve this problem, the standardization of the data broadcasting transmission system model is a working group of the subcommittee under the ATSC of the United States. The Data Implementation Working Group (DIWG) settled the data broadcasting service in the early stage and interoperability between data transmission equipment. The purpose of the present invention is to provide a recommendation regarding the implementation of a data broadcasting transmission system in order to facilitate the use of the system. However, since the structure and the module functions of the system are conceptually defined, there is a problem in that the actual system is not easily implemented.

In particular, in the data broadcasting transmission system, the multiplexing manager for the control between modules exists only, and the control for the insertion of actual data, the control for the encapsulation of various additional data, the control for the input / output of audio / video / additional data, the broadcast program Recommendations for managing schedule information and defining control signals between modules have not been considered.

Therefore, in the current technical field, control signals and metadata are generated based on broadcast schedule information and additional data information input through a user interface for a data broadcast service, and various types of additional data are encapsulated in a data broadcast transmission protocol. In order to be asynchronous, synchronized, and synchronized with the audio / video transport stream, a method for controlling a data broadcast server is required.

The present invention has been proposed to meet the above requirements, and by defining a multiplexing management and program scheduler device of a digital terrestrial data broadcasting transmission system, it is possible to encapsulate various types of additional data and multiplex and transmit the multimedia data. The present invention provides a data broadcasting server control apparatus for controlling input and output between modules to be controlled and broadcasted according to program schedule information, and a method thereof, and a computer-readable recording medium storing a program for realizing the method. have.

1 is a configuration example of a transmission system for ATSC-based terrestrial data broadcasting service to which the present invention is applied.

2 is a block diagram of an embodiment of a data broadcasting server control apparatus according to the present invention;

3 is a flowchart illustrating a metadata processing in a metadata managing unit of a data broadcasting server control apparatus according to the present invention.

4 is a flowchart illustrating a control signal processing in a multiplexing management unit of a data broadcasting server control apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

21: user input and output unit 22: metadata management unit

23: multiplexing management unit 24: program scheduler unit

According to an aspect of the present invention, there is provided a data broadcasting server control apparatus, comprising: user input / output means for receiving broadcast program schedule information and additional data information through an interface, and monitoring an operating state of a data broadcasting server; Schedule management means for storing and managing broadcast program schedule information according to the broadcast schedule information of the user input / output means; According to the schedule information of the schedule management means, for controlling the additional data encapsulation, insertion of additional data and generation of PSI / PSIP / SDF (Program Specific Information / Program and System Information Protocol / Service Description Framework) table through the transmitted and received control signal Control means; And metadata transmission means for generating and storing metadata according to the additional data information of the user input / output means, and for transmitting the metadata according to the control signal of the control means.

In addition, the present invention, in the data broadcast server control method applied to the data broadcast server control apparatus of the broadcast transmission system, at the time of system initialization, and stores and manages the broadcast schedule information according to the broadcast schedule information and the additional data information of the user input unit; A first step of generating metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating a Program Specific Information / Program and System Information Protocol / Service Description Framework (PSI / PSIP / SDF) table; Determine a direction of a control signal according to the stored broadcast schedule information and additional data information, and transmit metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating a PSI / PSIP / SDF table; Two steps; And generating and storing metadata according to the additional data information and transmitting metadata according to the control signal.

The present invention also provides a data broadcasting server control apparatus including a processor, when system initialization, stores and manages broadcast schedule information according to broadcast schedule information and additional data information of a user input unit, and includes metadata for encapsulating additional data; A first function of generating metadata for inserting additional data and metadata for generating a program specific information / program and system information protocol / service description framework (PSI / PSIP / SDF) table; Determine a direction of a control signal according to the stored broadcast schedule information and additional data information, and transmit metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating a PSI / PSIP / SDF table; 2 functions; And a computer-readable recording medium having recorded thereon a program for generating and storing metadata in accordance with the additional data information and for realizing a third function of transmitting metadata in accordance with the control signal.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration of a transmission system for an ATSC-based terrestrial data broadcasting service to which the present invention is applied.

As shown in FIG. 1, a transmission system for an ATSC-based terrestrial data broadcasting service includes an audio / video storage unit 101, an audio / video encoder 102, a program multiplexer 103, and a content authoring unit 105. And a content storage unit 106, a remultiplexer 111, and a data broadcast server 112.

Here, the data broadcast server 112 includes a data insertion unit 104, a data encapsulation unit 107, a multiplexing management and program scheduler device (data broadcast server control device) 108, a table storage unit 109, and a table generation unit. 110.

Looking at the specific configuration and operation of each component as described above in more detail as follows.

The audio / video storage unit 101 stores the audio / video and delivers the audio / video to the audio / video encoder 102 for compression.

The audio / video encoder 102 is a video encoder that produces a compression-coded video stream according to the MPEG-2 standard and audio that is compression-coded according to the MPEG-2 Advanced Audio Coding (AAC) standard or the Audio Coding (AC) -3 standard. It is composed of an audio encoder for generating a stream, and receives the audio / video from the audio / video storage 101, compresses and encodes it and then delivers it to the program multiplexer (103).

The program multiplexer 103 packetizes the compressed / encoded audio / video stream into a packetized elementary stream (PES) through the audio / video encoder 102 and transmits the packetized element to the data broadcasting server 112.

The content authoring unit 105 receives additional data stored in the content storage unit 106, generates metadata having additional data information, and transmits the metadata to the content storage unit 106.

The content storage unit 106 stores the metadata having additional data information and transmits the metadata to the data broadcasting server 112.

The data encapsulation unit 107 performs the function of encapsulating the additional data into the MPEG-2 transport stream according to the control signal of the multiplexing management and program scheduler 108 and the metadata for the additional data encapsulation. -stream / stream and synchronization Non-stream data is encapsulated in the Digital Storage Media-Command and Control (DSM-CC) section of the International Data Broadcasting Standard, and Internet Protocol (IP) datagrams are DSM-CC Encapsulate it into an addressable section. Here, the synchronization / synchronization stream data is encapsulated in MPEG-2 PES. The MPEG-4 additional data is encapsulated in 14496. At this time, the MPEG-2 synchronization / synchronization transport stream is delivered to the data insertion unit 104, and the MPEG-2 asynchronous transport stream is delivered to the remultiplexer 111.

The data insertion unit 104 is an MPEG-2 audio / video transport stream and a data encapsulation unit 107 of the program multiplexing unit 103 according to the control signal of the multiplexing management and program scheduler device 108 and metadata for inserting additional data. Multiplexes the MPEG-2 synchronization / synchronization additional data transport stream and transmits the multiplexed data to the remultiplexer 111.

The table storage unit 109 receives and stores metadata for generating a PSI / PSIP / SDF (Program Specific Information / Program and System Information Protocol / Service Description Framework) table of the multiplexing management and program scheduler device 108.

The table generator 110 generates and re-creates the PSI / PSIP / SDF table according to the control signal of the multiplexing management and program scheduler device 108 and metadata for generating the PSI / PSIP / SDF table of the table storage unit 109. Transfer to the multiplexer 111.

The multiplexing management and program scheduler device 108 receives broadcast program schedule information and additional data information through an interface, outputs monitoring information of data broadcast transmission system modules, stores and manages broadcast program schedule information, and transmits and receives a control signal. Control encapsulation of additional data, insertion of additional data, and input / output of PSI / PSIP / SDF tables.

The remultiplexing unit 111 multiplexes the multiplexed MPEG-2 audio, video, synchronization / synchronization additional data transport stream packet of the data broadcasting server, and the PSI / PSIP / SDF transport stream packet of the PSIP generating unit 110 by remultiplexing one packet. Output to the transport stream. In addition, the remultiplexer 111 remultiplexes the MPEG-2 audio / video transport stream packet, the MPEG-2 asynchronous additional data transport stream packet of the data broadcasting server, and the PSI / PSIP / SDF transport stream packet of the PSIP generation unit 110. Output in one transport stream.

2 is a configuration diagram of an apparatus for controlling a data broadcast server according to the present invention.

As shown in FIG. 2, the data broadcasting server control apparatus 108 according to the present invention receives a broadcast program schedule information and additional data information through an interface, and monitors an operation of the data broadcasting server 112. According to the user input / output unit 21 and the program schedule information of the user input / output unit 21, the program scheduler unit 24 for storing and managing broadcast program schedule information, and the schedule information of the program scheduler unit 24 And generating metadata according to the additional data information of the multiplexing manager 23 and the user input / output unit 21 for controlling encapsulation of additional data, insertion of additional data, and generation of a PSI / PSIP / SDF table through transmitted and received control signals. And a metadata management unit 22 for storing and transferring metadata in accordance with the control signal of the multiplexing management unit 23.

An operation process of the data broadcasting server control apparatus of the present invention having the structure as described above will be described in detail as follows.

The user input / output unit 21 receives broadcast program organization information, information for inserting additional data, information for encapsulating additional data, and information for generating a PSI / PSIP / SDF table through an input device and a storage device. Monitor the operation of 112.

The program scheduler 24 stores and manages broadcast program schedule information, and determines a multimedia data service start time and end time, additional data service start time and end time, and accordingly determine a control start time.

The multiplexing manager 23 generates a control signal according to the stored program schedule information, determines a control direction through the transmitted and received control signals, encapsulates various types of additional data into an MPEG-2 additional data transport stream, and adds additional data to multimedia data. It controls insertion and generation and modification of PSI / PSIP / SDF, and controls input / output of metadata, MPEG-2 additional data transport stream packet and PSI / PSIP / SDF transport stream packet.

The metadata manager 22 uses metadata for additional data encapsulation, metadata for inserting additional data, and metadata for generating PSI / PSIP / SDF tables using the additional data information input through the user input / output unit 21. Create and save the file and pass the stored metadata to the module.

3 is a flowchart illustrating a metadata processing process in a metadata managing unit of a data broadcasting server control apparatus according to the present invention.

As shown in FIG. 3, the metadata processing in the metadata management unit according to the present invention may include broadcast schedule information and additional data through a user interface in the multiplexing management and program scheduler device (data broadcast server control device) 108. The metadata is generated according to the information (301). Also, a program clock reference (PCR) for synchronous control is periodically received from the data inserting unit 104 to calculate a PTS (Presentation Time Stamp) of a broadcast schedule start time and include it in metadata for inserting additional data.

Then, the metadata generated by the multiplexing management and program scheduler 108 transmits metadata for additional data encapsulation to the data encapsulation unit 107 (302).

The data encapsulation unit 107 encapsulates additional data into MPEG-2 additional data transport stream packets through metadata received from the multiplexing management and program scheduler device 108, and the result of the encapsulation into metadata for inserting additional data. And send back to the multiplexing management and program scheduler device 108 (303).

Accordingly, the multiplexing management and program scheduler device 108 transmits the metadata for generating the PSI / PSIP / SDF table to the table storage unit 109 according to the broadcast schedule information received through the user interface (304).

Then, the table storage unit 109 transmits the metadata for generating the broadcast service table to the table generator 110 (305), and the table generator 110 generates the PSI / PSIP / SDF table using the metadata. To create it.

Subsequently, the multiplexing management and program scheduler device 108 analyzes the synchronization type (306) and transfers metadata for inserting the additional data to the data inserting unit 104 (307) if it is a synchronous or synchronized additional data (307), otherwise the operation To exit.

4 is a flowchart illustrating a control signal processing process in a multiplexing management unit of a data broadcasting server control apparatus according to the present invention.

As shown in FIG. 4, the control signal processing in the multiplexing management unit according to the present invention analyzes broadcast program schedule information (401) and determines a control start time (402).

Subsequently, the multiplexing management and program scheduler 108 transmits a control signal for metadata input / output to the data encapsulation unit 107 and the data generation unit, and transmits metadata when a metadata input request is received (403).

When the data encapsulation unit 107 transmits a metadata reception completion signal to the multiplexing management and program scheduler device 108, the multiplexing management and program scheduler device 108 transmits a control signal to start the additional data encapsulation operation (404). ).

When the table generator 110 transmits a metadata reception completion signal to the multiplexing management and program scheduler device, the multiplexing management and program scheduler device transmits a control signal to start generating the PSI / PSIP / SDF table (405).

The multiplexing management and program scheduler analyzes the synchronization type of the additional data (406) and, in the case of the synchronization / synchronization data, transmits and receives a control signal for metadata input / output to the data insertion unit 104 (409) and then the data encapsulation unit 107. In step 410, the data insertion unit 104 transmits / receives an OMP-2 additional data transport stream input / output control signal, or transmits / receives a PSI / PSIP / SDF transport stream packet input / output control signal to the table generator 408.

On the other hand, if the analysis result is not the synchronization / synchronization data, the data encapsulation unit 107 and the MPEG-2 additional data transport stream input and output control signal transmission and reception (407), the table generator and the PSI / PSIP / SDF transport stream packet input and output control Transmit and receive a signal (408).

Here, look at the structure of the metadata for generating the PSI / PSIP / SDF table as shown in Table 1 below.

In Table 1, in the apparatus and method for controlling a data broadcasting server according to the present invention, the data broadcasting server module is controlled, the additional data is encapsulated into an MPEG-2 transport stream packet, and the MPEG-2 additional data transport stream packet is encapsulated. A metadata structure for inserting into an audio / video transport stream packet and generating a PSI / PSIP / SDF table is shown.

The metadata for scheduling data broadcast of Table 1 includes a metadata identifier for one-to-one matching with additional data, a metadata version for generating and editing metadata, a start time and a service period of the additional data.

Metadata for encapsulating the additional data of [Table 1] includes an identifier matched with the additional data, an encapsulation type for encapsulating the additional data, a data type, an additional data PID (packet identifier), and a data rate for controlling the additional data. Additional data rate is included. It also includes addressable encapsulation information, download encapsulation information, PES encapsulation information, and MPEG-4 encapsulation information conforming to the ATSC data broadcast transmission standard.

The metadata for inserting the supplementary data of [Table 1] includes a metadata identifier matched with the supplementary data, the number of transport stream packets having the transport stream packet number and the starting PTS, data type, and synchronization to determine when the supplementary data is inserted. Type, Program Map Table (PMT) PID, Program Clock Reference (PCR) PID, Start PTS (Presentation Time Stamp).

Broadcasting service information and information for generating a PSI, PSIP, SDF table according to the ATSC data broadcasting transmission standard having an identifier matching the additional data in the metadata for generating the PSI / PSIP / SDF table of [Table 1] Contains information for creating descriptors.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention provides additional data such as educational broadcasts, quiz entertainment, games, advertisements, weather forecasts, stock price information, news provision, home shopping, and home banking, which deviate from existing broadcasting services that unilaterally transmit information to viewers. As a data broadcasting transmission system control module that provides a control system, it controls to satisfy the transmission type for various types of data defined in the data broadcasting standard, and controls to insert asynchronous / synchronous / synchronized additional data into the multimedia data. There is an effect that can provide a broadcast service.

Claims (12)

In the data broadcasting server control apparatus, User input / output means for receiving broadcast program schedule information and additional data information through an interface, and monitoring an operating state of a data broadcast server; Schedule management means for storing and managing broadcast program schedule information according to the broadcast schedule information of the user input / output means; According to the schedule information of the schedule management means, for controlling the additional data encapsulation, insertion of additional data and generation of PSI / PSIP / SDF (Program Specific Information / Program and System Information Protocol / Service Description Framework) table through the transmitted and received control signal Control means; And Metadata transmission means for generating and storing metadata in accordance with the additional data information of the user input and output means, and for transmitting the metadata in accordance with the control signal of the control means Data broadcasting server control apparatus comprising a. The method of claim 1, The user input and output means, Receiving input of program information, information for inserting additional data, information for encapsulating additional data, information for generating a PSI / PSIP / SDF table, and outputting an operation state of a data broadcasting server through an input device and a storage device. An apparatus for controlling a data broadcast server. The method of claim 1, The schedule management means, And storing and managing broadcast program schedule information, determining a start time and an end time of a multimedia data service, a start time and an end time of an additional data service, and thereby determining a start time of control. The method of claim 1, The control means, Generates a control signal according to the schedule information of the schedule management means, and determines the control direction through the transmitted and received control signal to encapsulate various types of additional data into MPEG-2 additional data transport stream, insert additional data into multimedia data, and PSI And control PSPS / SDF generation and modification, and control input / output of metadata, MPEG-2 additional data transport stream packet, and PSI / PSIP / SDF transport stream packet. The method of claim 1, The control means, Generate and store metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating PSI / PSIP / SDF tables using the additional data information input through the user input / output means, and stored metadata Apparatus for controlling a data broadcast server, comprising: transmitting the data to a corresponding module. The method according to any one of claims 1 to 5, The metadata delivery means, Generate and store metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating PSI / PSIP / SDF tables using the additional data information input through the user input / output means, and stored metadata Apparatus for controlling a data broadcast server, comprising: transmitting the data to a corresponding module. The method of claim 6, The control signal, In accordance with the operation state of the control means, the input, output, transmission completion, transmission and error of the additional data and define the input, output, transmission completion, transmission, error of the metadata, connection, disconnection, error And starting, in operation, and completion of operation. The method of claim 6, Metadata for the additional data encapsulation, A metadata identifier, an encapsulation type, a data type, an additional data PID (Packet Identifier), and an additional data rate; And 4 generating encapsulation information. The method of claim 6, Metadata for inserting the additional data, Metadata identifier, number of transport stream packets, data type, synchronization type, PMT (Program Map Table), PID, Program Clock Reference (PCR) PID, start PTS (Presentation Time Stamp). And a start PTS according to the system PCR information received from the data insertion unit. The method of claim 6, The metadata for generating the PSI / PSIP / SDF table is And a metadata identifier, PSI (PAT, PMT) table information, SDF (DST, NRT) table information, and PSIP table information. A data broadcast server control method applied to a data broadcast server control apparatus of a broadcast transmission system, During system initialization, the broadcast schedule information is stored and managed according to the broadcast schedule information and additional data information of the user input unit, metadata for encapsulating additional data, metadata for inserting additional data, and PSI / PSIP / SDF (Program Specific Information). A first step of generating metadata for generating a table; Determine a direction of a control signal according to the stored broadcast schedule information and additional data information, and transmit metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating a PSI / PSIP / SDF table; Two steps; And A third step of generating and storing metadata according to the additional data information and transmitting metadata according to the control signal; Data broadcasting server control method comprising a. In a data broadcasting server control device having a processor, During system initialization, the broadcast schedule information is stored and managed according to the broadcast schedule information and additional data information of the user input unit, metadata for encapsulating additional data, metadata for inserting additional data, and PSI / PSIP / SDF (Program Specific Information). A first function of generating metadata for creating a table; Determine a direction of a control signal according to the stored broadcast schedule information and additional data information, and transmit metadata for encapsulating additional data, metadata for inserting additional data, and metadata for generating a PSI / PSIP / SDF table; 2 functions; And A third function of generating and storing metadata according to the additional data information and transmitting metadata according to the control signal A computer-readable recording medium having recorded thereon a program for realizing this.