KR20210085932A - Method for processing additional data in digital broadcasting system and apparatus for the same - Google Patents

Abstract

Disclosed is a broadcast reception device to provide additional data requested by a user without configuring a set-top box. According to one embodiment of the present invention, the broadcast reception device comprises: a broadcast data processing unit receiving a broadcast signal including broadcast data and signaling information through a radio frequency (RF) broadcast network and extracting user response descriptor (URD) information from the broadcast data; a communication data processing unit requesting and receiving additional data through a communication network on the basis of the URD information and managing the additional data; a storage unit storing the broadcast data and the additional data; and an output unit determining whether to output the additional data on the basis of a user's input and synchronizing and outputting the additional data corresponding to the user's input with the broadcast data.

Description

ADDITIONAL DATA PROCESSING METHOD AND APPARATUS OF DIGITAL BROADCASTING SYSTEM

The present disclosure relates to a digital broadcasting system, and more particularly, to a method and apparatus for processing additional data in a digital broadcasting environment.

In general, digital broadcasting transmits broadcasting data according to MPEG-TS (Motion Picture Expert Group - Transport Stream), which is a transmission standard of MPEG. Such MPEG-TS is delivered to the set-top through various broadcast transmission networks such as over-the-air, satellite, and cable networks. At this time, in MPEG-TS, a plurality of audio, video, and data streams are multiplexed into one stream and transmitted. Even multiple broadcast channels may exist in one MPEG-TS.

Therefore, in order to find ES (elementary stream), which means individual streams such as internal audio/video information and data, tables such as PAT (Program Association Table) and PMT (Program Map Table) are periodically inserted into MPEG?TS. will send These tables and individual ESs are each coded as packets and have different PIDs (Packet IDs). In addition, PSI (Program and System Information) information such as MGT (Master Guide Table), VCT (Virtual Channel Table), and RRT (Rating Region Table) that displays program guides, channel configuration information, and viewing available ratings are also inserted. .

In order to decode MPEG-TS, PAT and PMT information is required. In addition, MPEG-TS is a series of packets having different PIDs internally, and has different types of information according to these PIDs. In order to find the audio or video stream inside the MPEG-TS, first, it is necessary to find the PAT, which is a packet having PID 0, and find out the PID of the PMT recorded in the PAT. When the PMT packet is found with the PMT PID, the PID of the audio or video streams can be known, and each of them can be extracted, so that a screen or sound output is possible.

Since the above-described digital broadcasting system is designed and configured for the purpose of providing a one-way service, uplink signal processing for processing a signal according to a subscriber's request is not considered. Accordingly, there is a problem in that an interactive service cannot be provided together with the real-time broadcasting service. In order to provide an interactive service in such an environment, there is a problem in that a separate set-top box capable of confirming a subscriber's request or providing requested data must be used.

However, the 8VSB transmission method is used to provide digital broadcasting services in terrestrial and cable broadcasting systems, and in this broadcasting environment, subscribers want to receive real-time interactive additional services. In relation to these service requirements, there is a need for a method that can provide a two-way supplementary service to the existing broadcast service without replacing the system.

The technical problem of the present disclosure is to provide a method and apparatus capable of providing additional data requested by a user using broadcast data transmitted through MPEG-2 TS without configuring a separate set-top box for processing additional data is doing

Another technical object of the present disclosure is to provide a method and apparatus capable of providing additional data corresponding to a user's request by additionally defining and transmitting information related to a user's request in the PMT of the MPEG-2 TS.

The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present disclosure belongs from the description below. will be able

According to an aspect of the present disclosure, a broadcast receiving apparatus may be provided. The device receives a broadcast signal and signaling information including broadcast data through an RF broadcast network, and a broadcast data processing unit for extracting User Response Descriptor (URD) information from the broadcast data; based on a communication data processing unit for requesting and receiving additional data through a communication network and managing the additional data, a storage unit for storing the broadcast data and the additional data, and whether the additional data is output based on a user's input and an output unit for determining and outputting additional data corresponding to the user input in synchronization with the broadcast data.

The features briefly summarized above with respect to the present disclosure are merely exemplary aspects of the detailed description of the present disclosure that follows, and do not limit the scope of the present disclosure.

According to the present disclosure, a method and apparatus capable of providing additional data requested by a user using broadcast data transmitted through MPEG-2 TS without configuring a separate set-top box for processing additional data will be provided. can

According to the present disclosure, by additionally defining and transmitting information related to a user's request in the PMT of the MPEG-2 TS, a method and apparatus capable of providing additional data corresponding to the user's request may be provided.

Effects obtainable in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present disclosure belongs from the description below. will be.

1 is a block diagram showing the configuration of a digital broadcasting system according to an embodiment of the present invention.
2 is a diagram illustrating a structure of an MPEG-TS transmitted through a digital broadcasting system according to an embodiment of the present invention.
3 is a block diagram illustrating an example of a detailed configuration of the output unit provided in FIG. 1 .
4 is an exemplary diagram of PAT and PMT used in a digital broadcasting system according to an embodiment of the present invention.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present disclosure pertains can easily implement them. However, the present disclosure may be implemented in several different forms and is not limited to the embodiments described herein.

In describing an embodiment of the present disclosure, if it is determined that a detailed description of a well-known configuration or function may obscure the gist of the present disclosure, a detailed description thereof will be omitted. And, in the drawings, parts not related to the description of the present disclosure are omitted, and similar reference numerals are attached to similar parts.

In the present disclosure, when it is said that a component is "connected", "coupled" or "connected" with another component, it is not only a direct connection relationship, but also an indirect connection relationship in which another component exists in the middle. may also include. In addition, when a component is said to "include" or "have" another component, it means that another component may be further included without excluding other components unless otherwise stated. .

In the present disclosure, components that are distinguished from each other are for clearly explaining each characteristic, and do not necessarily mean that the components are separated. That is, a plurality of components may be integrated to form one hardware or software unit, or one component may be distributed to form a plurality of hardware or software units. Accordingly, even if not specifically mentioned, such integrated or distributed embodiments are also included in the scope of the present disclosure.

In the present disclosure, components described in various embodiments do not necessarily mean essential components, and some may be optional components. Accordingly, an embodiment composed of a subset of components described in an embodiment is also included in the scope of the present disclosure. In addition, embodiments including other components in addition to components described in various embodiments are also included in the scope of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a transmission/reception system according to an embodiment of the present invention. Referring to FIG. 1 , a transmission/reception system includes a broadcast device, communication devices 100 - 1 and 100 - 2 , and a reception device 200 .

The broadcasting apparatus and the communication apparatuses 100-1 and 100-2 transmit different signals through different paths. For example, the broadcast device 100-1 transmits a broadcast signal through a radio frequency broadcast network (RF), and the communication device 100-2 uses a communication network (eg, an IP communication network (Internet Protocol Communication Network)). Communication data can be transmitted and received through

It is difficult to provide an interactive service together with a real-time broadcast service because upstream signal processing for processing a signal according to a subscriber's request has not been considered. In order to provide an interactive service in such an environment, there is a disadvantage that is possible only when a separate set-top box is used. However, the 8VSB transmission method is used to provide digital broadcasting services in terrestrial and cable broadcasting systems, and in this terrestrial and cable broadcasting system environment, subscribers want to receive real-time interactive supplementary services. In relation to these service requirements, there is a need for a method that can provide a two-way supplementary service using an existing system without replacing the broadcasting system in operation. In consideration of this, the broadcast device may configure and transmit an MPEG2-TS based broadcast signal. In this case, URD (User Response Descriptor) information related to a user request may be included in the PMT of MPEG2-TS. For example, the URD information may include address information (eg, URL) for a source (document or page) from which additional data can be obtained.

Referring to FIG. 1 , a reception device 200 according to an embodiment of the present invention includes a broadcast data processing unit 210 , a communication data processing unit 220 , an output unit 230 , a control unit 240 , and a storage unit 250 . include The receiving device 200 may be various types of devices such as a TV, a mobile phone, a tablet PC, a laptop computer, a PC, a kiosk, a set-top box, and a billboard.

The broadcast data processing unit 210 receives a broadcast signal including broadcast data and signaling information through a radio frequency broadcast network (RF). In this case, the broadcast signal may be configured based on MPEG2-TS, and may include broadcast data 21 , 22 , 23 and PSI (Program Specific Information) 25 divided for each program or channel. In particular, PAT, PMT, etc. may be recorded in the PSI 25 , and User Response Descriptor (URD) information for processing a subscriber request may be recorded, and detailed information thereof will be described in detail with reference to FIG. 4 below. do.

The controller 240 controls the overall operation of the receiving device 200 . Basically, the control unit 240 controls the operation of the broadcast data processing unit 210 to control the operation of outputting the broadcast data through the output unit 230 . In particular, the control unit 240 controls the operation of the communication data processing unit 220 based on User Response Descriptor (URD) information for processing a subscriber request, and stores additional data received through the communication data processing unit 220 . You can control your actions.

The communication data processing unit 220 may include a communication interface that can access a communication network (eg, an IP communication network (Internet Protocol Communication Network)), and may request and receive predetermined data through the communication network. The communication data processing unit 220 may receive additional data from a source device corresponding to each of a plurality of additional data source information.

In particular, the communication data processing unit 220 may request and receive additional data from the communication device 100 - 2 based on User Response Descriptor (URD) information recorded in the PMT of MPEG2-TS. In addition, the additional data processing unit 233 may store the received additional data by providing it to the storage unit 250 .

The broadcasting apparatus and the communication apparatus 100-1 and 100-2 may provide synchronization information in various forms and methods according to the type of content, the transmission environment, the encoding method, the size of the content, and the like. The broadcasting device 100-1 may transmit various types of information necessary for a broadcasting service, including synchronization information, in signaling information.

The storage unit 250 stores broadcast data (eg, video and audio data, etc.) and additional data included in the broadcast signal, respectively. The storage unit 250 includes various storage means such as flash memory, HDD, RAM, ROM, and buffer.

The output unit 230 processes, synchronizes, and outputs broadcast data (eg, video and audio data, etc.) and additional data stored in the storage unit 250 , respectively. For synchronization output, the output unit 230 may include a plurality of data processing units. That is, the output unit 230 includes various components for processing and displaying video data such as a video decoder, a scaler, a frame rate conversion circuit, a display panel, and a backlight unit, as well as audio such as an audio decoder, an amplifier, a noise filter, and a speaker. It can even include components for processing and outputting data. A plurality of such components may be provided according to the number of received signals. For convenience of description, only the components for processing and displaying video data will be illustrated and described below, and the illustration and description will be omitted in relation to audio data.

3 is a block diagram illustrating an example of a detailed configuration of the output unit 230 provided in FIG. 1 . Referring to FIG. 3 , the output unit 230 includes a video processing unit 231 , a URD information checking unit 232 , an additional data processing unit 233 , and a rendering unit 235 .

The video processing unit 231 is a component for processing broadcast data. When the broadcast signal received from the broadcast data processing unit 210 is in the MPEG2-TS format, the video processing unit 231 demuxes the received transport stream to perform video ES. to output In this case, the video processing unit 231 may be implemented as an MPEG2 decoder. Accordingly, the video processing unit 231 decodes the received video ES, and the decoded raw data is provided to the rendering unit 235 .

The URD check unit 232 is configured to detect and check URD information among information recorded in broadcast data. When the broadcast signal is in the MPEG2-TS format, the URD check unit 232 may detect User Response Descriptor (URD) information recorded in the PMT and provide it to the additional data processing unit 233 .

The additional data processing unit 233 may check the URD information provided by the URD check unit 232 , and detect additional data stored in the storage unit 250 using the checked UDR information. As described above, the URD information may be a URL in which additional data is recorded, and the additional data may be configured in a predetermined file format. Accordingly, the additional data processing unit 233 may include a file parser capable of parsing data of a predetermined file format, and may configure the parsed data in a displayable data format and provide it to the rendering unit 235 . .

The additional data processing unit 233 may be configured to overlap the additional data in a partial area of the display area while displaying the video ES, or to output the additional data to a partial area separated from the area displaying the video ES.

The rendering unit 235 performs rendering by combining the decoded video frame and additional data provided from the video processing unit 231 and the additional data processing unit 233 . The controller 240 may perform a synchronized output by controlling video frames corresponding to each other to be combined and rendered.

Specifically, data provided from the video processing unit 231 and the additional data processing unit 233, that is, raw data, may include synchronization information such as a time code or a frame number in the form of a watermark. The rendering unit 233 detects the synchronization information in the form of watermark included in each raw data, and then directly synchronizes each frame based on the synchronization information, or corrects the time stamp of each frame, and then according to the time stamp. Rendering can be performed.

Synchronization may be performed in various ways according to a synchronization type. The controller 240 may determine a synchronization method according to signaling information.

4 is an exemplary diagram of PAT and PMT used in a digital broadcasting system according to an embodiment of the present invention.

Referring to FIG. 4 , a PAT (Program Association Table) 400 is a PID of a PMT (Program Map Table) (410, 420, ...) capable of identifying at least one content (eg, a program, a channel, etc.) may include. In addition, at least one content (eg, a program, a channel, etc.) may be configured to include elements such as audio, video, and additional data, and the PMTs 410 and 420 include each element (eg, audio, video, and additional data). data, etc.) includes information on which PID is transmitted. In particular, the PMTs 410 and 420 may include URD information 411 and 421 .

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be directly implemented in hardware executed by a processor, a software module, or a combination of the two. A software module may reside in a storage medium (ie, memory and/or storage) such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM. An exemplary storage medium is coupled to the processor, the processor can read information from, and write information to, the storage medium. Alternatively, the storage medium may be integral with the processor. The processor and storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and storage medium may reside as separate components within the user terminal.

Example methods of the present disclosure are expressed as a series of operations for clarity of description, but this is not intended to limit the order in which the steps are performed, and if necessary, each step may be performed simultaneously or in a different order. In order to implement the method according to the present disclosure, other steps may be included in addition to the illustrated steps, steps may be excluded from some steps, and/or other steps may be included except for some steps.

Various embodiments of the present disclosure do not list all possible combinations, but are intended to describe representative aspects of the present disclosure, and the details described in various embodiments may be applied independently or in combination of two or more.

In addition, various embodiments of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. For implementation by hardware, one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose It may be implemented by a processor (general processor), a controller, a microcontroller, a microprocessor, and the like.

The scope of the present disclosure includes software or machine-executable instructions (eg, operating system, application, firmware, program, etc.) that cause an operation according to the method of various embodiments to be executed on a device or computer, and such software or and non-transitory computer-readable media in which instructions and the like are stored and executed on a device or computer.

Claims (1)

A broadcast data processing unit for receiving a broadcast signal and signaling information including broadcast data through a radio frequency broadcast network (RF) and extracting User Response Descriptor (URD) information from the broadcast data;
a communication data processing unit for requesting and receiving additional data through a communication network based on the URD information and managing the additional data;
a storage unit for storing the broadcast data and additional data;
and an output unit for determining whether to output the additional data based on a user's input and outputting the additional data corresponding to the user's input in synchronization with the broadcast data.

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