WO2018016694A1 - Broadcast transmitter and receiver capable of high-speed acquisition of decoded information and method therefor - Google Patents

Abstract

A broadcast transmitting device according to one aspect of the present invention comprises: a content providing unit for delivering a content to be delivered via a broadcast to a multiplexing unit described below; and the multiplexing unit which receives the content, generates a control information frame including setting information for reproducing the content, generates a content frame composed of the content, and converts the control information frame and the content frame into a T2-MI packet.

Description

Broadcast transmitter and receiver capable of high speed acquisition of decoding information and method thereof

The present invention relates to a digital broadcast transmission and receiver, and more particularly, to a broadcast transmitter, a receiver, and a method for transmitting and receiving broadcast decoding information at high speed in a broadcast communication convergence environment.

As digital broadcasting conversion of developed countries around the world is finished, ultra-high definition video (4K: 3,840x2,160 to 8K) is 4 to 16 times clearer than the quality of HDTV (Ultra High Definition Television, HDTV) in the Post-HD era. : Next-generation realistic broadcasting that enables ultra-realistic experience with 7,680x4,320) and multi-channel (more than 10 channels) audio reproduction) Actively done.

Recently, research and development on network-independent converged broadcasting equipment and monitoring system that enables users to use optimized high-quality contents through broadcasting network and communication network in fixed & mobile environment for broadcasting and communication-based converged broadcasting service have been performed. In this research and development, multiplexing and transmission techniques employed in DVB (Digital Video Broadcasting)-T2 (2nd Generation Terrestrial) broadcasting transmission system, scalable high efficiency video coding (SHVC) image compression technology, MPEG Media Transport (MMT) transmission protocol By adopting the technique, a transmission system for transmitting 4K UHD & HD mobile broadcasting through a single terrestrial channel is being developed.

In addition, the development of converged broadcasting service technology that transmits 8K Ultra High Definition (UHD) image data through a broadcasting network and a communication network by applying MMT protocol transmission technology, SHVC video compression technology, and DVB-T2 physical transmission technology is being actively developed. .

The MMT protocol transmission technology has been proposed in place of the MPEG-2 TS (Moving Picture Experts Group-2 Transport Stream) used in broadcasting networks, and is one of the multimedia transmission technologies for supporting multimedia services based on MPEG technology. 2 was proposed to overcome the limitations of TS.

However, the development of converged broadcasting service technology is being performed by each layer or technology of broadcasting or communication, and in particular, in applying and developing MMT protocol transmission technology, the connection with the physical layer is not considered.

Therefore, there is a problem that there is no technology capable of providing converged broadcasting at high speed by interworking with a physical layer and an MMT protocol transmission technology.

SUMMARY OF THE INVENTION The present invention has been made in view of the above technical background, and provides a technique for rapidly transmitting and receiving information required for MMT decoding using a MMT protocol transmission technique in a broadcasting and communication convergence environment to provide a user with a high speed. It is an object of the present invention to provide a broadcast transmitter, a receiver and a method for providing converged broadcasting.

The object of the present invention is not limited to the above-mentioned object, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a broadcast transmission apparatus, comprising: a content provider for delivering content to be broadcasted to a multiplexer; And generating a control information frame including setting information for receiving the content and playing the corresponding content, generating a content frame composed of the content, and converting the control information frame and the content frame into a T2-MI packet. Characterized in that it comprises a multiplexer.

In accordance with another aspect of the present invention, a broadcast receiving apparatus includes: a receiver configured to receive a broadcast signal; A demultiplexer for demultiplexing the received broadcast signal to generate a control information frame and a content frame for setting a reception apparatus, and to first transmit the control information frame to an MMT engine unit; An MMT engine unit configured to receive the control information frame and to set a decoder; And a decoder which decodes the content included in the broadcast signal using the control information frame and the content frame.

According to another aspect of the present invention, a broadcast transmission method includes: a content providing step of preparing content to be delivered through broadcast; And a control information frame generation step of generating a control information frame including setting information for playing the content. A content frame generation step of generating the content to be delivered in units of frames; A multiplexing step of multiplexing the control information frame and the content frame; And an interface conversion step of converting the control information frame and the content frame into T2-MI packets.

In accordance with another aspect of the present invention, a broadcast receiving method includes: a broadcast signal receiving step of receiving and inversely modulating a transmitted broadcast signal; A demultiplexing step of dividing the inversely modulated broadcast signal into data frames; A control information setting step of setting a receiver by a control information frame including control information of the demultiplexed data frame; And a decoding step of decoding content included in the broadcast signal in the control information.

According to the present invention, by providing and acquiring initial information related to MMT decoding at high speed, it is possible to start watching contents of converged broadcasting in a short time.

1 is a diagram illustrating a structure of a UHD video transmission system through a terrestrial channel.

2 is a structural diagram of a broadcast transmitter according to an embodiment of the present invention.

3 is a diagram illustrating a structure of a T2-MI packet.

4 is a structural diagram of a broadcast receiver according to another embodiment of the present invention.

5 is a flowchart of a broadcast transmission method according to another embodiment of the present invention.

6 is a flowchart of a broadcast receiving method according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Meanwhile, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “comprising” refers to a component, step, operation and / or device that is present in one or more other components, steps, operations and / or elements. Or does not exclude additions.

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

1 shows the structure of a transmission system for transmitting 8K, 4K UHD and HD video over a terrestrial single channel.

Basically, the transmission system has a structure that secures 8K, 4K UHD and HD related data by using SHVC method and transmits it through one terrestrial channel. At this time, the image compression technique may use coding techniques such as HEVC (High Efficiency Video Coding, H265, x265) or H.264 / MPEG-4 AVC.

When 8K, 4K UHD, and HD data is transmitted, each receiver can select and decode an image having a size suitable for its decoding capability, so the mobile device can select and play only the HD image portion of the received data. In addition, the fixed receiver capable of 4K UHD decoding can provide 4K UHD video to the user by decoding both 4K UHD and HD video.

The 8K additional data (8K additional) is not a terrestrial broadcasting channel but a structure that can be received through a wired / wireless communication network.

That is, the 8K UHD video provided as an optional option receives 4K UHD video including an HD video through a terrestrial broadcasting channel, and additional data necessary for 8K UHD is transmitted using wired / wireless communication. Combination can provide images of 8K UHD.

2 is a structural diagram of a broadcast transmitter 200 according to an embodiment of the present invention.

The broadcast transmitter 200 includes a content provider 210 and a multiplexer 220.

The content provider 210 delivers 4K UHD and HD content for the fixed and mobile terminals to the multiplexer 220 using the MMT protocol.

At this time, the initial setting information related to the MMT protocol is separately transmitted to the multiplexer 220. The initial setting information includes total track information, track information, content information, MMT reference information, and the like.

The total track information is information about how many videos / audios are transmitted, the track information is encoding information of content inserted in each track, and the content information is codec information and resolution information, average and maximum bitrate of the corresponding content. ), The maximum buffer size, and the MMT reference information includes information such as which asset name the content has and location information.

The MMT asset refers to multimedia data corresponding to video / audio provided for specific content.

The multiplexer 220 receives the above information from the content provider 210 to generate a content baseband frame, and separately generates a frame for control information that is initial setting information.

To this end, the multiplexer 220 includes a control information generator 222, a content frame generator 224, a system synchronizer 226, and a modulator interface 228.

All frames or content frames generated by the control information are delivered to the DVB-T2 modulator and broadcast transmission is performed. The interface with the modulator is based on a T2-MI (Modulator Interface).

3 shows a T2-MI packet structure used for interfacing with a modulator.

The T2-MI packet includes a T2-MI header and a payload. The header contains information about the packet such as packet type (packet_type) or packet count (packet_count). Data is included.

The packet type is used to classify the T2-MI packet. Table 1 shows the contents of the packet according to the packet type.

T2-MI Packet_Type	Explanation
00 16	Baseband Frame
01 16	Auxiliary stream I / Q data
10 16	L1 current (L1 current)
11 16	L1 future
20 16	DVB-T2 timestamp
21 16	Indivisual addressing
30 16	FEF part: Null (FEF part: Null)
31 16	FEF part: I / Q data (FEF part: I / Q data)
Other types	Reserved for future use

When 4K UHD and FHD contents inputted through the MMT protocol are converted into baseband frames and transmitted to the modulator through the T2-MI interface, the packet type '0x00' is used.

In the control information according to the present invention, the packet type in the T2-MI header is set to '0x21' and transmitted. That is, it is generated and transmitted in a separate packet from 4K UHD and FHD.

To this end, the multiplexer 220 includes a control information generator 222, a content frame generator 224, a system synchronizer 226, and a modulator interface 228.

The control information generator 222 separates the control information and signaling information such as total track information, track information, content information, and MMT reference information, which are initially transmitted separately from the content provider 210, from the content baseband frame. The frame is generated and transmitted to the modulator interface unit 228.

The content frame generator 224 generates 4K UHD and FHD contents input from the content provider 210 through the MMT protocol as a baseband frame and transmits the content to the modulator interface 228.

The system synchronizer 226 may receive information for time synchronization of contents from an NTP (Network Time Protocol) server 202, generate a timestamp, packetize it, and deliver the packet to a modulator interface 228.

Finally, the modulator interface unit 228 converts the content and setting information generated by the content frame generator 224 and the control information generator 222 into a T2-MI format for delivery to the modulator.

Thus, by making and transmitting control information for setting the broadcast receiving apparatus into a separate packet, the user can start playing multimedia content more quickly.

4 is a structural diagram of a broadcast receiver 400 according to another embodiment of the present invention.

The broadcast receiver 400 includes a receiver 410, a demultiplexer 420, an MMT engine unit 430, and a decoder 440.

The receiver 410 receives the broadcast signal of the DVB-T2 format and delivers it to the de-multiplexer 420.

The demultiplexer 420 classifies the data extracted from the received broadcast signal according to the packet type and delivers the data to the MMT engine unit 430. In the present invention, the packet type '0x21' is used for fast reception and setting of control information. The control information is first transmitted to the MMT engine unit 430.

The MMT engine unit 430 receives an MMT type packet from the demultiplexer 420 or the web server 402. The MMT engine unit 430 transmits data through a wired / wireless communication based on IP (Internet Protocol) from the web server 402. Receive.

The MMT engine unit 430 first receives control information from the demultiplexer 420, and sets a decoder 440 that decodes an 8K or 4K UHD fusion image by using the control information. The control information includes total track information, track information, content information, MMT reference information, and the like as described above.

After the setting of the decoder 440 is completed, the MMT engine unit 430 transmits the MMT content packet received from the demultiplexer 420 and the web server 402 to the decoder 440.

The decoder 440 may quickly provide 8K, 4K UHD or FHD video and audio to the user by decoding the MMT content packet received according to the setting by the control information.

For reference, the components illustrated in FIGS. 1 to 3 according to an embodiment of the present invention may be implemented in software or hardware form such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC). Can play roles.

However, 'components' are not meant to be limited to software or hardware, and each component may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors.

Thus, as an example, a component may include components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and subs. Routines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.

Components and the functionality provided within those components may be combined into a smaller number of components or further separated into additional components.

Hereinafter, a broadcast transmission and reception method according to an embodiment of the present invention will be described with reference to FIGS. 5 and 6.

5 is a flowchart of a broadcast transmission method according to another embodiment of the present invention.

In the content providing step 510, 4K UHD and HD content is prepared for transmission to fixed and mobile terminals.

In the control information frame generation step 520, the prepared content is analyzed to first generate setting information necessary for reproduction of the content in the receiving terminal such as total track information, track information, content information, and MMT reference information.

After generating the control information frame first, the content frame is generated next (S530).

The generated control information frame and the content frame are multiplexed by the multiplexer (S540). For the high speed transmission and application of the control information, the control information is generated as a separate frame from the content frame and then multiplexed.

In the interface conversion step (S550), the interface is converted based on T2-MI to modulate the generated frames.

As described above, each frame is distinguished by the packet type in the T2-MI header. The control information frame has a packet type of '0x21' and the content frame has a packet type of '0x00'.

After the interface is converted to T2-MI, modulation is performed, and broadcast transmission is performed, the fixed or mobile user terminal may receive the signal and play the content.

6 is a flowchart of a broadcast receiving method according to another embodiment of the present invention.

A signal transmitted in the DVB-T2 format may be received (S610), and broadcast data may be extracted through its demodulation.

In step S620 of demultiplexing the extracted data, each frame is classified according to a packet type included in a T2-MI header.

Among the demultiplexed frames, a frame having initial configuration information corresponding to the packet type '0x21' is first analyzed to first set control information of the receiver (S630).

After setting of the receiver, the content frame may be decoded according to the setting (S640) to provide 8K, 4K UHD, or HD content to the user.

On the other hand, in the above description, steps S510 to S640 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted as necessary, and the order between the steps may be changed. In addition, even if omitted, the contents already described with reference to FIGS. 1 to 4 may be applied to the broadcast transmission and reception methods of FIGS. 5 and 6.

By generating, transmitting, receiving, and setting the control information of the receiver in a separate packet and frame, the user has an advantage of being able to receive content quickly without waiting for a change in the control information according to the content change.

Meanwhile, an embodiment of the present invention may be implemented in the form of a computer program stored in a medium executed by a computer or a recording medium including instructions executable by the computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, computer readable media may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transmission mechanism, and includes any information delivery media.

Although the methods and systems of the present invention have been described in connection with specific embodiments, some or all of their components or operations may be implemented using a computer system having a general purpose hardware architecture.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

Claims (12)

1. A content provider for delivering content to be broadcasted to a multiplexer; And

   A multiplexer for generating a control information frame including setting information for receiving the content and playing the content, generating a content frame composed of the content, and converting the control information frame and the content frame into a T2-MI packet; part;

   Broadcast transmission device comprising a.
2. The method of claim 1, wherein the multiplexing unit

   Allocating different packet type information to the control information frame and the content frame

   Broadcast transmission device.
3. The method of claim 1, wherein the control information frame

   Including total track number information, track information, content information, and MMT reference information of the content;

   Broadcast transmission device.
4. Receiving unit for receiving a broadcast signal;

   A demultiplexer for demultiplexing the received broadcast signal to generate a control information frame and a content frame for setting a reception apparatus, and to first transmit the control information frame to an MMT engine unit;

   An MMT engine unit configured to receive the control information frame and to set a decoder; And

   A decoder which decodes content included in the broadcast signal using the control information frame and the content frame;

   Broadcast receiving device comprising a.
5. The method of claim 4, wherein the demultiplexer

   Dividing the control information frame and the content frame by the allocated packet type information from the received broadcast signal;

   Broadcast receiving device.
6. The method of claim 4, wherein the control information frame

   Including total track number information, track information, content information, and MMT reference information of the content;

   Broadcast receiving device.
7. A content providing step of preparing content to be delivered by broadcasting; And

   A control information frame generation step of generating a control information frame including setting information for playing the content;

   A content frame generation step of generating the content to be delivered in units of frames;

   A multiplexing step of multiplexing the control information frame and the content frame; And

   An interface conversion step of converting the control information frame and the content frame into T2-MI packets;

   Broadcast transmission method comprising a.
8. 8. The method of claim 7, wherein said multiplexing step

   Allocating different packet type information to the control information frame and the content frame

   Broadcast transmission method.
9. The method of claim 7, wherein the control information frame

   Including total track number information, track information, content information, and MMT reference information of the content;

   Broadcast transmission method.
10. A broadcast signal receiving step of receiving and inversely modulating the transmitted broadcast signal;

    A demultiplexing step of dividing the inversely modulated broadcast signal into data frames;

    A control information setting step of setting a receiver by a control information frame including control information of the demultiplexed data frame; And

    A decoding step of decoding content included in the broadcast signal in the control information;

    Broadcast receiving method comprising a.
11. The method of claim 10, wherein the setting of the control information

    First analyzing a frame including control information among the demultiplexed data frames

    Broadcast reception method.
12. The method of claim 10, wherein the control information frame

    Including total track number information, track information, content information, and MMT reference information of content included in the broadcast signal;

    Broadcast reception method.

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