KR20190068477A - ATSC 3.0 integrated signal generator - Google Patents

Abstract

According to the present invention, in an integrated signal generation device for generating an ATSC 3.0-based terrestrial ultra-high definition broadcast stream, videos and audios for terrestrial broadcasting are stored as a packet capture (PCAP) file. In addition, a processor encodes the PCAP file, signals a disaster message inputted from the outside, streams broadcast content for additional services, generates a broadcast stream by multiplexing a result of encoding or signaling, and transmits the generated broadcast stream to a receiver through a broadcast receiver.

Description

ATSC 3.0 integrated signal generator for terrestrial super high definition broadcasting

The present invention relates to an integrated signal generator for terrestrial super high definition broadcasting.

Generally, a digital TV broadcasting system transmits video, audio, and additional data in an MPEG-2 Transport Stream (TS) transmission format to provide digital broadcasting in real time. However, recently, the consumption of broadcast contents using a portable terminal capable of IP access around the world has been rapidly increasing, and interest in ultra-high quality UHD broadcasting service, which is a large capacity among broadcasters and consumer electronics companies, is increasing.

The Advanced Television System Committee (ATSC) 3.0 broadcasting standard, which was established in North America, improved the transmission capacity by changing the transmission method of the physical layer in order to transmit a large amount of UHD broadcasting contents through a terrestrial broadcasting network. In order to accommodate changes in the consumption patterns of broadcast contents, the ATSC 3.0 broadcast standard introduces an IP-based broadcast content transmission method in order to provide a more efficient and compatible broadcast service using both a broadcast network and a broadband network Respectively.

In North America, with the completion of ATSC 3.0 standardization, the timing of introduction of broadcasting signal generators has arrived. Worldwide TV manufacturers are building a development environment for broadcasting ATSC 3.0 broadcast content targeting the North American market. Here, the development environment is an environment for testing ATSC 3.0 receiving chips and modules. It refers to transmission / reception test integrated equipment in North American broadcasters and research institutes and transmission equipment for demonstration in the North American broadcasting or TV market.

In Korea, UHD TV receiver development and development of test equipment are expected to be activated in accordance with the introduction and expansion of ATSC 3.0 based UHD broadcasting service. Therefore, there is a need for a test verification environment. However, in order to provide ATSC 3.0 based UHD broadcast contents to users in Korea, it is necessary to develop an integrated signal generator in the form of a combination of ATSC 3.0 data monitoring equipment and ATSC 3.0 integrated transmission equipment.

Accordingly, the present invention provides an integrated signal generating apparatus to which a standard broadcast signal integration test / verification solution prescribed in ATSC 3.0-based domestic and North American system standards for providing UHD broadcast service based on ATSC 3.0 is applied.

According to an aspect of the present invention, there is provided an integrated signal generator for generating an ATSC 3.0 based terrestrial super high definition broadcast stream,

A memory in which video and audio for terrestrial broadcasting are stored in a PCAP (Packet Capture) file, the PCAP file is encoded, a disaster message input from the outside is signaled, a broadcast content for an additional service is streamed, A processor for multiplexing a result to generate a terrestrial broadcast stream, and a transmission module for transmitting the broadcast stream to a broadcast receiver.

The processor can encode and IP-process the closed caption, insert it into the video for disaster broadcasting, and process the closed caption based on the format defined in the MMT (MPEG Media Transport) / ROUTE protocol.

The processor may signal an application for the supplementary service including a disaster message transmission service, a non real-time content transmission service, an AST (Application Signaling Table) or a HELD (HTML Entry pages Location Description) signal information support service.

The processor may process an Advanced Emergency Alert Table (AEAT) to process the disaster message transmission service including at least one of text, moving picture, graphics, and photographs.

The processor can confirm at least one of information necessary for execution of the application and required information through execution of the AST through XML (Extensible Markup Language) format.

The processor may generate an electronic service guide (ESG) including program information, images, moving pictures, and link information for executing an application.

The processor may perform a dynamic adaptive streaming over HTTP (DASG) streaming function to encapsulate the media content to transmit the media content to the receiver.

According to the present invention, since an ATSC 3.0 broadcast signal can be generated through one integrated signal transmission device, it is possible to easily generate and transmit a broadcast signal without purchasing a plurality of devices in order to generate a broadcast signal.

1 is an exemplary diagram of a general ATSC 3.0 broadcast signal transmitting apparatus.
2 is a structural diagram of an integrated signal transmitting apparatus according to an embodiment of the present invention.
3 is a structural diagram of a processor according to an embodiment of the present invention.
4 is a flowchart illustrating an integrated signal transmission method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, an integrated signal generator for terrestrial super high definition broadcasting according to an embodiment of the present invention will be described with reference to the drawings. Before describing an embodiment of the present invention, a current ATSC 3.0 broadcast signal transmitting apparatus will be described first with reference to FIG.

1 is an exemplary diagram of a general ATSC 3.0 broadcast signal transmitting apparatus.

1, in order to provide a terrestrial super high definition broadcast to a viewer, a broadcast transmission apparatus 10 generates a broadcast stream and provides it to a receiver (for example, a TV, etc.) 20 via a network. At this time, the broadcast transmission apparatus 10 must have various equipment for generating a standard broadcast stream defined by the ATSC 3.0-based domestic and North American system standards.

For example, the broadcast transmission apparatus 10 includes a moving picture encoder for encoding a moving picture, a signal encoder for encoding an ATSC 3.0 signal, an ESG (Electronic Service Guide) signal, and a closed caption (CC) And a multiplexer for generating encoded information as a broadcast stream, are included in the broadcast transmission apparatus 10. Each of these devices performs signal transmission / information editing according to the standards defined in ATSC 3.0 for transmitting or editing signals, and each of the devices is made up of a plurality of equipment manufacturers It is a form that is used.

That is, it is impossible to generate terrestrial super-high-definition broadcasting signals using only one equipment, and since a plurality of expensive equipment must be purchased, a great deal of cost is required for initial terrestrial super-high-definition broadcasting. Therefore, in the embodiment of the present invention, an integrated signal transmitting apparatus capable of generating a terrestrial super high definition broadcast signal through a single apparatus is proposed. An integrated signal transmitting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG.

FIG. 2 is a structural diagram of an integrated signal transmitting apparatus according to an embodiment of the present invention, and FIG. 3 is a structural diagram of a processor according to an embodiment of the present invention.

As shown in FIG. 2, the integrated signal transmitting apparatus 100 includes an interface 110, a processor 120, an RF transmitting module 130, and a memory 140. The processor 120 includes a PCAP file processing module 121, a caption processing module 122, an additional service processing module 123, a broadband signal processing module 124, and a multiplexer module 125.

The interface 110 receives an input from an administrator managing the integrated signal transmitting apparatus 100. Herein, the input of the manager receives control information for new information or control when new information in a form not previously stored in the memory 140 is generated, or when additional control for broadcast transmission is required, The input is not limited to any one form.

The memory 140 stores and manages video and audio information for a broadcast service as a PCAP (Packet Capture) file. The PCAP file is a file composed of a PCAP file header, a packet header, and packet data. The API capturing traffic captures a video packet for a broadcast service and generates summary information on the video.

The integrated signal transmission apparatus 100 can transmit a moving picture for providing a broadcasting service based on IP using a PCAP file. Here, the form of the PCAP file is already known, and a detailed description thereof will be omitted in the embodiment of the present invention.

In addition, the memory 140 stores and manages additional images to be provided to a user using a terrestrial broadcasting network. The memory 140 stores and manages various programs for driving the integrated signal transmitting apparatus 100, and does not limit the types and forms of the programs to any one.

The processor 120 generates a broadcast stream for providing a terrestrial super high definition broadcast service while driving a program stored in the memory 140. [ That is, the processor 120 edits the PCAP file stored in the memory 140 according to a standard prescribed in ATSC 3.0.

In addition, the processor 120 generates multi-channel media, a signal, and an ESG based on information registered in a separate management module (not shown) for managing the integrated signal transmitting apparatus 100 for ultra-high quality broadcasting. The processor 120 then performs signaling to enable delivery of a disaster alert message and multimedia to provide the disaster message entered via the interface 110 along with the disaster broadcast.

In addition, when providing the broadcast stream to the user, the processor 120 adaptively streams and provides the video packet based on the network quality. In addition, the processor 120 downloads an additional image using the terrestrial broadcasting network in advance to the memory 140, and then synchronizes with the broadcast program transmitted in real time to provide a high-definition 3DTV to the viewer. Stream broadcast content.

The RF transmission module 130 transmits the broadcast stream generated by the processor 120 to the ATSC 3.0 broadcast receiver 20.

Here, the structure of the processor 120 will be described with reference to FIG.

3 is a structural diagram of a processor according to an embodiment of the present invention.

3, the processor 120 includes a PCAP file processing module 121, a caption processing module 122, an ESG (Electronic Service Guide) generation module 123, a broadband signal processing module 124, Module 125. < / RTI >

The PCAP file processing module 121 processes broadcast data (video, audio) in the form of a PCAP file stored in the memory 140 based on the ATSC 3.0 and enables it to be repeatedly transmitted.

The caption processing module 122 encodes the closed caption, performs IP multiplexing processing, and inserts the caption into the video for disaster broadcasting. The closed caption processing module 122 processes the closed caption based on the format defined in the ATSC 3.0 MMT (MPEG Media Transport) / ROUTE protocol, and the processing method can be executed by various methods. Therefore, the detailed description is omitted in the embodiment of the present invention do.

The additional service processing module 123 signals an application for providing additional services to provide various additional services to the user. Here, the supplementary service includes a domestic or North American disaster message transmission service, a non-real-time content transmission service, an application signaling table (AST), and a HELD (HTML Entry pages Location Description) signal information support service.

In order to provide the disaster message transmission service, the supplementary service processing module 123 processes CAP and AEAT (Advanced Emergency Alert Table). The AEAT is a signaling signal for delivering a disaster alarm message and multimedia to the ATSC 3.0 broadcast receiver 20. The AEAT 3.0 broadcast receiver 20 receives a variety of multimedia emergency alert services such as graphics, .

In order to process contents of various supplementary services, the supplementary service processing module 123 collects application execution time, essential information necessary for execution, etc. through an AST document in XML (Extensible Markup Language) format included in the supplementary service signaling information do. The above-mentioned AST, HELD, AEAT, etc. are already known, and detailed description will be omitted in the embodiment of the present invention.

The broadband signal processing module 124 generates an ESG including link information for executing an image, a moving image, and an application in an ESG that contains only text-based simple program information provided in an existing DTV. The ESG service is transmitted to the ATSC 3.0 broadcast receiver 20 through the NRT file using the ROUTE transport protocol.

The ESG data included in the ESG consists of a Service Guide Delivery Descripter (SGDD) and a Service Guide Delivery Unit (SGDU). The ESG data can be transmitted through the broadcasting network and broadband, and the ESG data signaling information as to whether the ESG data is transmitted through the medium is transmitted only through the broadcasting network.

That is, in the ATSC 3.0 broadcast receiver 20 receiving the ESG data, the location of the ESG data transmitted through the broadband can be known through the sltInetUrl element of the SLT (Service List Table), and the SGDD of the broadband ESG is transmitted The URL information can be confirmed. Accordingly, the broadband signal processing module 124 generates the ESG data signaling information and the ESG data so that the ATSC 3.0 broadcast receiver 20 can acquire the URL information of the ESG. The method of generating and signaling the ESG data by the broadband signal processing module 124 can be variously performed, so that the detailed description will be omitted in the embodiment of the present invention.

In addition, the broadband signal processing module 124 performs a DASG (Dynamic Adaptive Streaming over HTTP) streaming function. That is, the broadband signal processing module 124 encapsulates the content in order to transmit media contents such as video and audio. And the bit rate is variably streamed using the DASG segment.

The multiplexer module 125 may store the results generated by at least one of the signaling module 121, the caption processing module 122, the ESG generation module 123, and the broadband signal processing module 124, And generates a broadcast stream together with the PCAP file.

A method of transmitting the terrestrial super high definition broadcast stream based on ATSC 3.0 by the integrated signal transmission apparatus 100 will be described with reference to FIG.

4 is a flowchart illustrating an integrated signal transmission method according to an embodiment of the present invention.

4, the integrated signal transmission apparatus 100 processes a PCAP file stored in advance (S100), or transmits a disaster message or a supplementary service or a broadband signal to be provided as a disaster broadcast when a disaster occurs (S101 to S103).

Conventionally, a processing device for processing a PCAP file, a device for processing a disaster message, a device for processing an additional service, and a device for processing a broadband signal are provided with encoders manufactured by manufacturers, respectively, as shown in FIG. 1 . However, in the embodiment of the present invention, the integrated signal transmitting apparatus 100 can process these signals integrally so that one integrated signal transmitting apparatus 100 can process a signal even without the separate encoder .

The signal processing results processed in steps S100 to S103 are multiplexed (S104), and are generated as a terrestrial broadcast stream (S105). Here, the method of MUX of the signal processing results varies, and therefore, the present invention is not limited to any one method.

Then, the terrestrial broadcast stream generated in step S105 is transmitted to the ATSC 3.0 broadcast receivers through the RF transmission module 130 provided in the integrated signal transmission apparatus 100 (S106). In this manner, the IP multiplexed PCAP file based on ATSC 3.0 can be repeatedly transmitted through one integrated signal transmitting apparatus 100, or broadcast information of the PCAP file can be edited. Also, it is possible to generate / multiplex / edit multichannel media, signals and ESG such as UHD or HD using one integrated signal transmission apparatus 100 and to transmit / receive multimedia data such as MMT, ROUTE, ALP (ATSC Link- Studio-to-Transmitter Link) over IP and RF.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (8)

An integrated signal generator for generating an ATSC 3.0 based terrestrial super high definition broadcast stream,
A memory in which video and audio for terrestrial broadcasting are stored as a PCAP (Packet Capture) file,
A processor for encoding the PCAP file, signaling an externally input disaster message, streaming broadcast content for additional services, multiplexing the result of the encoding or signaling and generating a terrestrial broadcast stream, and
A transmitter module for transmitting the broadcast stream to a broadcast receiver
And an integrated signal generator. The method according to claim 1,
The processor comprising:
The closed caption is encoded and IP processed, inserted into the video for disaster broadcasting,
An integrated signal generator for processing closed captioning based on a format defined in the MMT (MPEG Media Transport) / ROUTE protocol. 3. The method of claim 2,
The processor comprising:
An integrated signal generator for signaling an application for the supplementary service including a disaster message transmission service, a non-real-time content transmission service, an AST (Application Signaling Table) or a HELD (HTML Entry pages Location Description) signal information support service. The method of claim 3,
The processor comprising:
And an AEAT (Advanced Emergency Alert Table) for processing the disaster message transmission service including at least one of text, moving pictures, graphics, and photographs. 5. The method of claim 4,
The processor comprising:
And at least one of information necessary for execution of the application and essential information to be executed through the AST in the XML (Extensible Markup Language) format. 6. The method of claim 5,
The processor comprising:
An electronic service guide (ESG) including program information, an image, a moving picture, and link information for executing an application. The method according to claim 6,
Wherein the ESG is transmitted to a receiver through any one of a broadcasting network and a broadband. 8. The method of claim 7,
The processor comprising:
And a DASG (Dynamic Adaptive Streaming over HTTP) streaming function for encapsulating the media content to transmit the media content to the receiver.

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