KR20030070407A - An information transmitting/receiving system of a data broadcast and the transmitting/receiving method using the transmitting/receiving system of a data broadcast - Google Patents

Abstract

PURPOSE: A data broadcasting transmitting/receiving system and data broadcasting transmitting/receiving method using the system are provided to separate information for data from information for images and sounds. CONSTITUTION: Data storage units(310,311) respectively receive broadcasting programming information and data contents information from a programming system(100) and a data contents producing system(200) and stores the information. A program information generator(320,321) calls the broadcasting programming information and data contents information stored in the data storage unit and inserts a tag mapped with a packet identifier of components constructing data contents into PSIP information to generate at least one table related with PSIP. A transport stream processor(370) receives broadcasting audio and video sources to generate at least one table related with PSI information to create MPEG-2 transport streams. A reconstruction unit(380) accepts the PSIP-related information and PSI-related information from the program information generator and transport stream processor to transmit a reconstructed data broadcasting signal through a broadcasting network.

Description

Data broadcasting transmission / reception system and data broadcasting transmission / reception method using same {AN INFORMATION TRANSMITTING / RECEIVING SYSTEM OF A DATA BROADCAST AND THE TRANSMITTING / RECEIVING METHOD USING THE TRANSMITTING / RECEIVING SYSTEM OF A DATA BROADCAST}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to data broadcasting. In particular, a data broadcasting transmitting / receiving system for separating and transmitting information for data and information for video and audio, and receiving the separated broadcasting information, and a data broadcasting transmitting / It relates to a receiving method.

In general, data broadcasting refers to information related to a program, weather, securities, and news, as well as information and e-commerce through the Internet through a broadcasting network. ) Also broadcasts to make it possible. Such data broadcasting has the function of creating new high value-added new industries such as services, devices, and contents as well as functioning as a new information infrastructure for general users.

Conventional data broadcasting transmission system is configured to transmit the information that can refer to the location of the data in the broadcast receiving device together in a PSI table having information on the stream for transmitting video and audio information. In addition, the conventional broadcast receiving apparatus is configured to display the video, audio and data on the TV screen by analyzing the information transmitted and configured as described above. On the other hand, the system for constructing and transmitting the program information for data broadcasting as described above is operated by software mounted on a computer and made to operate in the above manner. In general, however, software has the potential for malfunction due to unexpected exceptions or undetected bugs. If such a situation occurs and the composition or transmission of program information for data broadcasting is not normally performed, the broadcast receiving device cannot process not only data but also video and audio, so that nothing is displayed on the TV screen. there is a problem.

For example, if a system for transmitting data broadcasting program information transmits wrong information or fails to send program information, the broadcast receiving apparatus cannot find program information for processing video and audio, and thus the TV may not receive a broadcast. Nothing is displayed on the screen, and this phenomenon becomes a broadcasting accident from the broadcaster's point of view.

In order to solve such a problem, the technical problem to be achieved by the present invention is to provide a system and method that can be configured to separate the information for data and information for video and audio.

Another object of the present invention is to separate a path for transmitting video and audio information.

In addition, another object of the present invention is to provide a receiving apparatus and method for interpreting the information separately configured as described above.

1 is a block diagram illustrating a conventional general data broadcasting transmission system.

2 is a block diagram illustrating a data broadcast transmission system according to an embodiment of the present invention.

3 is a flowchart illustrating a data broadcast transmission method according to an embodiment of the present invention.

FIG. 4 is a diagram showing a table relationship referring to data content elements for explaining the data broadcast transmission method of FIG.

FIG. 5 is a diagram illustrating a service location descriptor structure in the DST of FIG. 4.

6 is a diagram illustrating a data broadcast reception method according to an embodiment of the present invention.

Data broadcasting transmission system according to one feature of the present invention for achieving the above object,

A data broadcasting transmission system that adds and transmits data to video and audio signals through one or more channels based on organization information and data content information transmitted from an external organization system and a data content authoring system.

A data storage unit receiving and storing broadcast program programming information or authored data content information from the programming system or data content authoring system, respectively;

Calling the program information and the data content stored in the data storage unit to insert a tag mapped to the packet identifier (PID) of the component constituting the data content in the PSIP (PSIP) information to insert the A program information generation processor for generating one or more tables related to the PSIP);

A transport stream processor configured to receive broadcast audio and video sources from the outside and generate one or more tables related to PSI information to generate an MPEG-2 transport stream;

A reconstruction unit for receiving the generated PSIP related information and the PSI related information from the program information generation processing unit and the transport stream processing unit, and transmitting the reconstructed data broadcast signal through a broadcasting network;

It includes.

Data broadcast transmission method according to another feature of the present invention

In a data broadcasting transmission method using a data broadcasting transmission system that adds and transmits data to video and audio signals through one or more channels based on organization information and data content information transmitted from an external organization system and a data content authoring system,

Receiving broadcast program programming information and data content organized by the programming system and storing the information on data contents;

First and second program information generators configured to receive audio and video information, data program organization information, and data content configuration information to form a transport stream, based on the information on the broadcast program organization information and data content. Inserting a tag mapped to a packet identifier (PID) of a component constituting content into PSIP information and generating one or more tables related to the PSIP; And

It is checked whether data content to be transmitted through the first and second program information generators is transmitted on the same channel or another channel, and the tag information is inserted into the PSIP-related table generated according to the result and transmitted. Steps to

It includes.

Data broadcast receiving system according to another aspect of the present invention,

A data broadcasting reception system for receiving information from a data broadcasting transmission system for adding data to an image and an audio signal through one or more channels, and displaying the information transmitted through the display device.

A tuner configured to receive a mixture of audio and video stream data and data broadcasting content through a broadcast antenna and extract one MPEG-2 transport stream from the received broadcast signal;

An MPEG-2 decoder that separates the audio and video streams and the data streams from the stream received from the tuner,

When the MPEG-2 decoder finds a tag that is mapped with packet identifier (PID) information of a component constituting the received data content, which is specified in the DST table, the MPEG-2 decoder searches for a tag using PSIP information. It is characterized by.

According to another aspect of the present invention, a data broadcast receiving method includes

A data broadcast reception method for receiving information from a data broadcast transmission system that adds data to video and audio signals through one or more channels and transmits the data, and displays the information transmitted through the display device.

Extracting one MPEG-2 transport stream from the broadcast signal received through the tuner, separating and decoding the audio and video streams and the data stream;

A VCT table or NRT table for acquiring the tag value inserted in the tap loop in the DST table received from the decoded data stream to obtain the packet identifier (PID) of the transport stream. Configuring a;

Acquiring the corresponding data application component based on information obtained from the configured VCT table or the NRT table and displaying the corresponding data application component on the display device;

It includes.

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

2 is a block diagram illustrating a data broadcast transmission system according to an embodiment of the present invention.

As shown in FIG. 2, the data broadcasting transmission system 300 according to the embodiment of the present invention includes a database 310 (database, hereinafter referred to as DB) 310, a content DB 311, and a program information generator 1 320. , Program information generator 2 321, data controller 330, data encoder 340, MPEG-2 encoder 350, stream DB 360, stream generator 370, reconstructor 380, modulator 390 ).

The organization DB 310 stores detailed program information configuration result data for the data event transmitted from the program system 100, which is a system for inputting program information of the program installed in the broadcasting station.

The content DB 311 receives and stores the data content and its configuration information, which are authored from the data content authoring tool 200, which is a tool for authoring data content to be broadcast with an A / V (Audio / Video) program.

The program information generator 1 320 and the program information generator 2 321 call the organization information configuration result data stored in the organization DB 310 to collect A / V and data program organization information, and receive data content configuration information. One or more PSIP (PSIP: Program and System Information Protocol, protocol established by ATSC T3 (Technology Group on Distribution) for transmitting channel information and program information, hereinafter referred to as PSIP) table and DST (Data Service Table) table, A network resource table (NRT) table is generated, configured in a transport stream form, and transmitted to a reconstructor 380 to be described below. At this time, one of the program information generators 1, 2 (320, 321) operates as a primary, and delivers its output to the reconstructor 380, and the other one operates as a backup, and the output of the program information generators 1, 2 (320, 321) operates as a backup. 380).

The data controller 330 monitors the operating states of the program information generators 1, 2 (320, 321) and controls the operation switching between primary and backup based on the result.

The data encoder 340 calls and encodes the data content stored in the content DB 311 and configuration information thereof by the operation control signal from the data controller 330.

The MPEG-2 encoder 350 receives the produced broadcasting A / V source from a broadcasting station, generates an MPEG-2 transport stream, and contains program specific information containing configuration information about the transport stream. , Program characteristic information), PAT (Program Association Table), and PMT (Program Map Table).

The stream DB 360 receives and stores an A / V stream file in the form of a MPEG-2 transport stream prepared in advance from the outside.

The stream generator 370 receives an operation control signal from the data controller 330, reads a specific stream file stored in the stream DB 360, and transmits it to the reconstructor 380. If necessary, the stream generator 370 receives a packet identifier (PID, Packet). IDentifier) and the reconfiguration of the PSI.

The reconstructor 380 is the encoded data received from the data encoder 340 and the MPEG-2 encoder 350 and the stream file information read from the stream generator 370 and the program information generator 1 320 or the program information generator 2 ( PSIP information generated from 231 and table information related thereto are received and newly reconfigured.

The modulator 390 modulates the information in which the A / V stream data and the data broadcasting content are mixed from the reconstructor 380 and then transmits the modulated information on a carrier frequency and transmits it through the broadcast antenna 400.

The data broadcast receiving apparatus 500 receives a mixture of A / V stream data and data broadcasting contents through a broadcast antenna 400 and extracts one MPEG-2 transport stream from the received broadcast signals; Preferably, the apparatus further includes an MPEG-2 decoder that separates the A / V stream and the data stream, and the MPEG-2 decoder further includes an audio decoder and a video decoder for decoding the audio signal and the video signal.

Hereinafter, an operation of a data broadcasting transmission system according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a flowchart illustrating a data broadcast transmission method according to an embodiment of the present invention, FIG. 4 is a diagram illustrating a table relationship referring to data content elements for explaining the data broadcast transmission method of FIG. 4 is a diagram illustrating a structure of a service location descriptor in the DST of FIG.

The MPEG-2 encoder 350 receives the produced broadcasting A / V source from a broadcasting station and generates PSI information including PAT and PMT containing configuration information about the transport stream, thereby generating an MPEG-2 transport stream. ) And transmits the generated information to the reconstructor 380.

In the MPEG-2 system standard, there is a method of multiplexing video data, audio data, or other data into one stream so as to be suitable for the purpose of transmission or storage. One of them is a multiplexing method mainly for transmission of streams. The transport stream (TS) standard and the other is a program stream (PS) standard, which is a multiplexing method for storing streams. Here, the transport stream is composed of packets having a fixed length of 188 bytes, and consists of a fixed header, an extended header, and data to be actually transmitted. In order to demultiplex the data contained in the transport stream by type, a packet identifier (PID) corresponding to each data must be known, and a special data format for specifying a packet identifier list of data to be transmitted is separately defined. The PSI is called PSI and the table that defines the data format is called the PSI table. The PAT and PMT are tables included in the PSI and are used to list and transmit packet identifiers of data included in the transport stream.

When broadcast program programming information is transmitted from the programming system 100, the programming DB 310 stores detailed program information configuration result data about the transmitted data event. In addition, when the data content authored from the data content authoring tool 200 and configuration information thereof are transferred, the content DB 311 stores the transmitted data.

The program information generator 1 320 and the program information generator 2 321 call the organization information configuration result data stored in the organization DB 310 to collect A / V and data program organization information (S110).

The program information generators 1 and 2 320 and 321 receive the data content configuration information (S120), and generate the DST and NRT as shown in FIG. 4 attached to the PSIP tables (S130). Here, the program information generators 1 and 2 (320 and 321) generate an association_tag that is uniquely mapped with packet identifier (PID) information for the components constituting the data content (S140). The program information generators 1 and 2 (320 and 321) allocate the generated association_tag to the association_tag field in the TAP loop in the DST table (S150).

The program information generators 1 and 2 320 and 321 check whether the data content is transmitted on the same channel through which the current A / V stream is transmitted or on another channel or return channel (S160).

If the data content is transmitted on the same channel through which the current A / V stream is transmitted, the program information generators 1 and 2 (320 and 321) may associate association_tag_descriptor () with the same value as the association_tag generated in the TAP loop of the DST table. It is inserted into the descriptor () area in the service_location_descriptor () in the VCT table as shown in the figure and assigned to the association_tag field of the association_tag_descriptor () (S170). In this case, if the data content is transmitted in a channel or return channel different from the channel through which the current A / V stream is transmitted, the program information generators 1 and 2 (320 and 321) have the same value as the association_tag generated in the TAP loop of the DST table. It is allocated to the associationTag field in commonDescriptorHead () in dsmccResourceDescriptor () of the NRT table as shown in FIG. 4 (S180).

The data controller 330 monitors the operation state of the program information generators 1, 2 (320, 321) and controls the operation switching between the primary and the backup based on the result. The program information generator 1 receives the control signal. One of, 2 (320, 321) acts as a primary and delivers its output to the reconstructor 380, while the other acts as a backup and does not deliver its output to the reconstructor 380.

The data encoder 340 receives the operation control signal from the data controller 330, calls the data content stored in the content DB 311 and configuration information thereof, and encodes the same to transmit the data content to the reconstructor 380.

The reconstructor 380 is the encoded data received from the data encoder 340 and the MPEG-2 encoder 350 and the stream file information read from the stream generator 370 and the program information generator 1 320 or the program information generator 2 ( The received PSIP information and the table information related thereto are received and the received information is newly reconfigured (S190).

The modulator 390 receives and modulates the mixed information of the A / V stream data and the data broadcasting content from the reconstructor 380 and transmits the modulated information through the broadcast antenna 400 (S200).

6 is a diagram illustrating a data broadcast reception method according to an embodiment of the present invention.

Through a tuner (not shown), the data broadcast receiving apparatus 500 extracts one MPEG-2 transport stream from the received broadcast signal and separates the A / V stream and the data stream through an MPEG-2 decoder (not shown). do. When the A / V stream is decoded by the audio decoder and the video decoder, respectively, the data stream is processed by software (not shown) mounted on the data broadcast receiving apparatus 500. The data broadcast receiving apparatus 500 may obtain each A / V stream information (PID, stream_type, etc.) in the currently received transport stream from the PMT table as shown in FIG.

In order to process the data stream, the data broadcast reception device 500 obtains an association_tag value in a Tap loop in the received DST table (S300). Since signaling information for a data application serviced through a channel currently being received is transmitted through a DST table, the data broadcast reception apparatus 500 may determine a packet identifier ( In order to obtain PID), as shown in Fig. 4, in Service_location_descriptor () of VCT table, stream_type is obtained from elementary_PID value corresponding to '0x95', and packets with table_id value '0xCF' with the corresponding PID are collected. Configure the DST table.

From this, in order to acquire elements constituting each data application, first, as shown in FIG. 4, transport stream packets containing each data application component are present in a transport stream currently being received or in another transport stream or external web. The value of the resource_location field is checked to determine whether it is in another location such as a server (Web Server) (S310).

If the value of the resource_location field is 0, it means that transport stream packets containing the corresponding data application component exist in the transport stream currently being received. Therefore, the MPEG-2 decoder of the data broadcast receiving apparatus 500 finds an element having the same association_tag value in association_tag_descriptor () in service_location_descriptor () of the VCT table as shown in FIG. 4 and attaches elementary_PID and stream_type corresponding to this element. Information is acquired (S330). The MPEG-2 decoder sets acquired PID information (S340), and acquires a corresponding data application component based on the acquired information (S350).

In the resource_location check step (S310), if the value of the resource_location field is 1, the corresponding data application component may be acquired from a place such as a transport stream of another channel or an external web server. First, NRT table is composed by collecting packets with table_id value '0xD1' while having same PID as DST table. In commonDescriptorHeader () in dsmccResourceDescriptor () in this NRT table, find association_Tag with the same value as association_tag obtained from Tap () loop of DST table (S360), and from descriptor () in corresponding resourceDescriptorDataFields () area. Resource position information is acquired (S370). After setting the acquired resource position information (S380), the MPEG-2 decoder obtains detailed position information for acquiring the corresponding data application component (S350).

If an error occurs in the program information generators 1, 2 (320, 321) of the data broadcasting transmission system 300, and in the worst case, a PSIP / SDF (Service Description Framework: method of describing data broadcasting service information and a set-top box) In this case, a PSI table (PAT) containing information about A / V generated by the MPEG-2 encoder 350 is used when information is not transmitted. Since the PMTs are normally transmitted, the MPEG-2 transport stream is extracted through a tuner (not shown) of the data broadcast receiving apparatus 500 and the information of the PAT and PMT tables is transmitted through the MPEG-2 decoder. Based on this, the A / V stream is separated and processed through the audio decoder and the video decoder, respectively, to be displayed on the screen. Of course, since the PSIP / SDF information cannot be received, the data broadcast receiving apparatus 500 performs processing for the data application.

Although not performed, the TV 600 processes the channel like an A / V only without a data application.

The embodiments of the present invention described above are not limited to the one embodiment only, and are not limited by the above-described contents and the accompanying drawings, and various substitutions, modifications, and changes without departing from the spirit and scope of the present invention. Of course, change is possible.

As described above, the data broadcasting transmitting / receiving system of the present invention and the data broadcasting transmitting / receiving method using the same can be normally serviced without affecting the basic video and audio broadcasting service even if an error occurs in the data broadcasting program information transmitting system. Make sure

Claims (11)

In a data broadcasting transmission system that adds and transmits data to video and audio signals through one or more channels based on organization information and data content information transmitted from an external organization system and a data content authoring system, A data storage unit receiving and storing broadcast program programming information or authored data content information from the programming system or data content authoring system, respectively; Calling the program information and the data content stored in the data storage unit to insert a tag mapped to the packet identifier (PID) of the component constituting the data content in the PSIP (PSIP) information to insert the A program information generation processor for generating one or more tables related to the PSIP); A transport stream processor configured to receive broadcast audio and video sources from the outside and generate one or more tables related to PSI information to generate an MPEG-2 transport stream; A reconstruction unit for receiving the generated PSIP related information and the PSI related information from the program information generation processing unit and the transport stream processing unit, and transmitting the reconstructed data broadcast signal through a broadcasting network; Data broadcast transmission system comprising a. The method of claim 1, wherein the program generation processing unit Collect audio and video information and data program organization information by calling organization result data stored in the organization database, and receiving one or more PSIP tables, DST tables, and NLT First and second program information generators for generating an (NRT) table to form a transport stream; A data controller checking an operating state of the first and second program information generators and controlling an operation switching of the first and second program information generators based on the result; A data encoder which calls and encodes the data content stored in the content database and its configuration information according to an operation control signal from the data controller Data broadcast transmission system comprising a. The method of claim 2, wherein the first and second program information generators The first program information generator operates as a primary and delivers its output to the reconstruction section, the second program information generator operates as a backup and its output does not transfer to the reconstruction section and this control signal from the data controller. And alternately performing the primary and backup in accordance with the data broadcast transmission system. The method of claim 1, wherein the transport stream processing unit The MPEG-2 transport stream is generated by receiving the produced broadcasting audio and video source from the broadcasting station, and the PSI, PAT, and PMT containing configuration information about the generated transport stream An MPEG-2 encoder for generating PMT); A stream database for receiving and storing audio and video stream files in the form of an MPEG-2 transport stream; According to the operation control signal from the data controller, a stream which reads a specific stream file stored in the stream database and transmits it to the reconstructor, and performs the change of the packet identifier (PID) and the reconstruction of the PSI accordingly. Generator Data broadcast transmission system comprising a. In a data broadcasting transmission method using a data broadcasting transmission system that adds and transmits data to video and audio signals through one or more channels based on organization information and data content information transmitted from an external organization system and a data content authoring system, Receiving broadcast program programming information and data content organized by the programming system and storing the information on data contents; First and second program information generators configured to receive audio and video information, data program organization information, and data content configuration information to form a transport stream, based on the information on the broadcast program organization information and data content. Inserting a tag mapped to a packet identifier (PID) of a component constituting content into PSIP information and generating one or more tables related to the PSIP; And It is checked whether data content to be transmitted through the first and second program information generators is transmitted on the same channel or another channel, and the tag information is inserted into the PSIP-related table generated according to the result and transmitted. Steps to Data broadcast transmission method comprising a. The method of claim 5, wherein the table generation step Invoking broadcast program listing information configuration result data from a programming database storing broadcast program listing information through the first and second program information generators, and collecting audio and video data and data program listing information; Generating a PSIP table, a DST table related to the PSIP, and an NRT table based on the collected information; Generating a tag mapped with packet identifier (PID) information for components constituting the data content; Assigning the generated tag to a tag filter in a tap loop in the DST table Data broadcast transmission method comprising a. The method of claim 5, wherein the sending step If the data content is transmitted on the same channel through which the current audio and video stream is transmitted as a result of checking whether to transmit the same channel or another channel of the data content to be transmitted through the first and second program information generators, And inserting a tag descriptor which is the same value as a tag generated in a tap loop of a DST table into a descriptor area of a VCT table and assigning it to a tag field of the tag descriptor. The method according to any one of claims 5 to 7, wherein the first and second program information generators One related to the PSIP by inserting a tag mapped to a packet identifier (PID) of a component constituting the data content by calling the program information and the data content, into the PSIP information. Generating a table, wherein the first program information generator acts as a primary and delivers its output to a reconstructor for reconstructing the information to be sent, the second program information generator acts as a backup and the output to the reconstructor And alternately performing the primary and backup in accordance with a control signal from a data controller. In a data broadcast reception system for receiving information from a data broadcast transmission system that adds data to video and audio signals through one or more channels and transmits the data, and displays the information transmitted through a display device. A tuner configured to receive a mixture of audio and video stream data and data broadcasting content through a broadcast antenna and extract one MPEG-2 transport stream from the received broadcast signal; An MPEG-2 decoder that separates the audio and video streams and the data streams from the stream received from the tuner, When the MPEG-2 decoder finds a tag that is mapped with packet identifier (PID) information of a component constituting the received data content, which is specified in the DST table, the MPEG-2 decoder searches for a tag using PSIP information. A data broadcast receiving system, characterized in that. In a data broadcast receiving method of receiving information from a data broadcasting transmission system for adding data to an image and an audio signal through one or more channels and transmitting the information, and displaying the information transmitted through the display device, Extracting one MPEG-2 transport stream from the broadcast signal received through the tuner, separating and decoding the audio and video streams and the data stream; A VCT table or NRT table for acquiring the tag value inserted in the tap loop in the DST table received from the decoded data stream to obtain the packet identifier (PID) of the transport stream. Configuring a; Acquiring the corresponding data application component based on information obtained from the configured VCT table or the NRT table and displaying the corresponding data application component on the display device; Data broadcast receiving method comprising a. The method of claim 10, wherein the table construction step If the resource_location field value of the received transport stream packet containing each data application component is 0, the associated tag in the service location descriptor (service_location_descriptor ()) of the VCT table via the MPEG-2 decoder. Finding elements with the same tag value in the descriptor (association_tag_descriptor ()); Obtaining an element packet identifier (elementary_PID) and stream type information corresponding to the element; And Setting the obtained packet identifier information and acquiring the corresponding data application component based on the acquired packet identifier information Data broadcast receiving method comprising a.