KR20150093103A - Apparatus and method for providing ultra high definition broadcasting service - Google Patents

Abstract

The present invention relates to an apparatus and a method for providing an ultra high definition broadcasting service. According to the present invention, the apparatus for providing an ultra high definition: defines an ultra high definition broadcasting stream based on a value of an empty area in digital video broadcasting-service information (DVB-SI); encodes an ultra high definition broadcasting stream, and generates a basic stream; generates service information (SI) including a field value of a service type which indicates the ultra high definition broadcasting stream, stream content for a component configuring the ultra high definition broadcasting stream, and a value of a component type; and multiplexes the basic stream and the SI to transmit the same.

Description

[0001] APPARATUS AND METHOD FOR PROVIDING ULTRA HIGH DEFINITION BROADCASTING SERVICE [0002]

The present invention relates to an apparatus and a method for providing an ultra high definition broadcast service, and more particularly, to an apparatus and method for providing an ultra high definition broadcast service for providing an ultra high definition television (UHDTV) broadcast service based on DVB (Digital Video Broadcasting) .

Recently, UHDTV service, which is at least four times higher than HDTV picture quality, is emerging as interest in ultra-high definition broadcasting service has increased. TV manufacturers have launched UHDTV displays, and broadcasters are also preparing UHDTV services.

However, the UHDTV broadcasting service has a very large amount of data to be transmitted according to the super high picture quality, and thus it is difficult to provide the UHDTV broadcasting service by the conventional method such as DTV service. Therefore, it is necessary to use a HEVC (High Efficiency Video Coding) codec with a higher compression efficiency than the MPEG-2 codec used in the DTV service. In addition, a transmission system having a large data transmission capacity like the DVB- Should be used.

In the United States, Advanced Television Systems Committee (ATSC) is still working on next-generation broadcast standardization, so there is currently only DVB-T2 in the next generation broadcasting standard.

Therefore, there is a need for a method to provide UHDTV service based on the DVB-T2 system with the current specifications.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for providing an ultra high definition broadcast service providing a UHDTV service based on DVB.

According to an embodiment of the present invention, there is provided a method for providing an ultra high definition broadcast service on the basis of DVB (Digital Video Broadcasting) in an ultra high definition broadcast service providing apparatus. A method of providing an ultra high definition broadcast service includes defining an ultra high definition broadcast stream based on a value of a blank area in DVB-SI (Service Information), generating an elementary stream by encoding an ultra high definition broadcast stream, Generating an SI including a field value of a service type indicating a stream type and a value of a component type for a component constituting the super high definition broadcast stream, and multiplexing the elementary stream and the SI do.

According to the embodiment of the present invention, a UHDTV service can be effectively recognized in a new UHDTV receiver while providing backward compatibility in a conventional DTV receiver through a signaling method, thereby enabling a DVB-T2 UHDTV service can be effectively provided in DVB system including system.

FIG. 1 is a schematic view illustrating a concept of transmitting and receiving an ultra high definition broadcast service according to an embodiment of the present invention. Referring to FIG.
2 is a diagram illustrating field values of a service type provided in the DVB-SI standard.
FIG. 3 is a diagram showing a part of a detailed description of service components defined as stream content and component type in the DVB-SI standard.
4 is a block diagram of an apparatus for providing an ultra high definition broadcast service according to an embodiment of the present invention.
5 is a diagram illustrating an example of service type field values for broadcast content based on an HEVC codec according to an embodiment of the present invention.
6 is a diagram illustrating an example of a stream type and a component type of a component constituting broadcast content based on an HEVC codec according to an embodiment of the present invention.
7 is a diagram illustrating an example of a service descriptor of a HEVC codec-based broadcast service according to an embodiment of the present invention.
8 is a diagram illustrating an example of a HEVC codec-based broadcast service descriptor according to an embodiment of the present invention.
FIG. 9 is a diagram showing a tag value and a position of a descriptor currently provided in the DVB-SI standard; FIG.
10 is a diagram illustrating another example of a service type of a HEVC codec-based broadcast service according to an embodiment of the present invention.
11 is a flowchart illustrating a method of providing an ultra high definition broadcast service 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 and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

An apparatus and method for providing an ultra high definition broadcast service according to an embodiment of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a schematic view illustrating a concept of transmitting and receiving an ultra high definition broadcast service according to an embodiment of the present invention. Referring to FIG.

1, an apparatus 100 for providing an ultra high definition broadcast service multiplexes a video stream, an audio stream, and a data stream into one data stream to generate a transport stream (TS) corresponding to one broadcast channel , And transmits the generated TS to the super high definition broadcast service receiving apparatus 200 through the broadcasting network. In an embodiment of the invention, the video stream may be a UHDTV video stream.

The super high definition broadcast service receiving apparatus 200 receives the TS of the corresponding broadcast channel, demultiplexes the received TS into video, audio, and data streams, and then reproduces the video, audio, and data streams.

The apparatus 100 for providing an ultra high definition broadcast service according to an embodiment of the present invention signals the information of the UHDTV video stream so that the ultra high definition broadcast service receiving apparatus 200 can recognize the UHDTV video stream. At this time, the signaling conforms to the DVB-SI (Service Information) standard provided in the DVB system.

The ultra high definition broadcast service receiving apparatus 200 can recognize the UHDTV video stream based on the signaling information and reproduce the UHDTV video stream.

FIG. 2 is a diagram showing field values of a service type provided in the DVB-SI standard, FIG. 3 is a diagram showing a part of a detailed description of service components defined by stream content and component type in the DVB-SI standard to be.

As shown in FIG. 2, a DVB-SI standard defines a field value for a service type. For example, MPEG-2 SD DTV service is defined at 0x01 and MPEG-2 HD DTV service is defined at 0x11. The service type descriptor (service_descriptor) in the SDT (Service Description Table) and the service list descriptor (service_list_descriptor) in the NIT (Network Information Table) and BAT (Bouquet Association Table) among the tables constituting the DVB- ). The SDT serves to describe the services contained within a particular TS.

As shown in FIG. 3, a detailed definition of a component constituting a provided service is defined as a stream_content and a component type (component_type) in a component descriptor (component_descriptor). The component descriptor (Component_descriptor) is defined in SDT and EIT (Event Information Table) in DVB-SI.

As can be seen from FIGS. 2 and 3, the UHDTV video stream is not defined in the current DVB-SI standard. Therefore, a method of signaling the UHDTV service based on the HEVC codec based on the service descriptor (service descriptor) shown in FIG. 2 will be described.

4 is a block diagram of an apparatus for providing an ultra high definition broadcast service according to an embodiment of the present invention.

Referring to FIG. 4, an apparatus 100 for providing an ultra high definition broadcasting service includes an elementary stream generating unit 110, a signaling information generating unit 120, and a transmitting unit 130.

The elementary stream generating unit 110 encodes UHDTV broadcast contents including at least one of a UHDTV video stream, an audio stream and a data stream, and generates an elementary stream including encoded data of the UHDTV broadcast contents. The elementary stream generating unit 110 may use HEVC as a coding method.

The signaling information generation unit 120 generates additional information for UHDTV broadcast contents. In particular, since the ultra high definition broadcast service providing apparatus 100 conforms to the DVB scheme, the signaling information generating unit 120 can generate SI (Service Information) information for UHDTV broadcast contents.

The signaling information generation unit 120 generates at least one descriptor field among NIT (Network Information Table) information, SDT (Service Description Table) information and BAT (Bouquet Association Table) information among SIs, service descriptor information Can be added. In addition, the signaling information generator 120 may add stream content and component type information for a component constituting UHDTV broadcast contents to a component descriptor (component_descriptor) field.

For this, the signaling information generation unit 120 generates a signaling information field value of the service type for broadcasting contents based on the HEVC codec using the field value of the reserved area (reserved for future use) among the field values of the service type shown in FIG. And add a service type for broadcasting contents based on the HEVC codec to a reserved area (reserved for future use) among field values of the service type shown in FIG. In particular, broadcasting contents based on the HEVC codec can be applied not only to UHDTV broadcasting contents, but also to SD and HD broadcasting contents. Therefore, service type field values can be generated for each of UHDTV, SD and HD broadcast contents based on the HEVC codec.

5 is a diagram illustrating an example of service type field values for broadcast content based on an HEVC codec according to an embodiment of the present invention.

As shown in FIG. 5, a service type field value may be defined for HEVC codec-based broadcast content.

Alternatively, the signaling information generation unit 120 may determine a field value of a service type for broadcasting contents based on the HEVC codec by using a field value of a user defined field among the field values of the service type shown in FIG. And add a service type for broadcasting contents based on the HEVC codec to a field value user area (user dedefined) of the service type shown in FIG.

The signaling information generating unit 120 may add a field value of a service type indicating currently provided UHDTV broadcast content to at least one descriptor field among NIT information, SDT information, and BAT information among field values of the defined service type have.

The signaling information generation unit 120 may also generate a signaling information for various components constituting the broadcast content based on the HEVC codec using the field value of reserved for future use among the field values of the component descriptor (component_descriptor) It is possible to determine the values of stream_content and component_type and add various components constituting broadcast contents based on the HEVC codec to the reserved area for future use shown in FIG.

6 is a diagram illustrating an example of a stream type and a component type of a component constituting broadcast content based on an HEVC codec according to an embodiment of the present invention.

As shown in FIG. 6, values of stream contents and component types can be defined for the components constituting broadcasting contents based on the HEVC codec.

FIG. 2 shows a part of a video component constituting broadcast contents based on the HEVC codec, and more video components and audio components for a UHDTV service can be added and defined in this manner.

Likewise, the signaling information generator 120 generates a signaling content of the component constituting the broadcast content based on the HEVC codec, using the field value of the user defined field among the field values of the component descriptor (component_descriptor) (stream_content) and the component type (component_type), and may be defined in addition to a user defined area.

The signaling information generation unit 120 outputs a field value of a component descriptor (component_descriptor) to the components constituting the currently provided UHDTV broadcast content among the field values of the component descriptor (component_descriptor) defined in the component descriptor (component_descriptor) Can be added.

In this way, the signaling information generation unit 120 generates a signaling information based on the UHDTV broadcast contents, which are additionally defined in the service descriptor (service_descriptor) and the component descriptor (component_descriptor) defined in the current DVB- The signaling information of the content can be generated.

4, the transmitter 130 generates TS by multiplexing the elementary stream generated by the elementary stream generator 110 and the signaling information generated by the signaling information generator 120, and generates Lt; RTI ID = 0.0 > TS. ≪ / RTI >

Meanwhile, the signaling information generation unit 120 may define UHDTV broadcast contents by a method different from the method shown in FIG. 5 and FIG.

FIG. 7 is a diagram illustrating an example of a service descriptor of a HEVC codec-based broadcast service according to an embodiment of the present invention. FIG. 8 is a diagram illustrating an example of a HEVC codec-based broadcast service descriptor according to an embodiment of the present invention. to be. FIG. 9 is a diagram illustrating a tag value and a location of a descriptor currently provided in the DVB-SI standard, and FIG. 10 is a diagram illustrating another example of a service type of a HEVC codec-based broadcast service according to an embodiment of the present invention .

In the method shown in FIG. 5, the service of each video format should be added to the service type every time new content is added. 7, the signaling information generator 120 defines only the HEVC codec-based broadcast service in the service descriptor (service_descriptor) and newly defines the HEVC codec-based broadcast service descriptor (HEVC_service_descriptor) . As described above, the field value of the service type of the HEVC codec-based broadcast service is a field value of reserved for future use or a field value of user defined (user defined) among the field values of the service type shown in FIG. Can be used.

The HEVC codec-based broadcast service descriptor (HEVC_service_descriptor) can be newly defined as shown in FIG. At this time, the descriptor_tag must be assigned a newly defined value for the HEVC codec-based broadcast service descriptor (HEVC_service_descriptor).

As shown in FIG. 9, a DVB-SI standard defines a currently used descriptor and a tag value that can identify the descriptor. The DVB-SI standard defines a reserved field A user defined area is reserved for the possibility of being defined by the user for reserved for future use. For example, in the present DVB-SI standard, a value from 0x6F to 0x7F is allocated as reserved for future use, and a value from 0x80 to 0xFE is assigned as a user area. In the DVB-SI standard, one of the values of a user defined area or reserved for future use which is an empty value can be used as a tag value of a descriptor_tag. For example, a 0x80 in front of values of a user defined area may be assigned to a value of a descriptor tag (descriptor_tag) in a HEVC codec-based broadcast service descriptor (HEVC_service_descriptor).

The service type (HEVC_service_type) of the broadcast service based on the HEVC codec can be newly defined as shown in FIG.

This method provides backward compatibility with the existing MPEG-2 based digital television service and is more secure than the method shown in FIG. 5 in the backward compatibility providing method. 7, 8, and 10, a HEVC codec-based broadcast service is defined as an HEVC-based digital TV receiver 200, which parses an existing service descriptor (service_descriptor) The service can be reproduced by parsing only the HEVC codec-based broadcast service descriptor (HEVC_service_descriptor).

The signaling information generation unit 120 may be defined by adding a method as shown in FIG. 6 to various components constituting broadcasting contents based on the HEVC codec.

Meanwhile, the signaling information generator 120 may use the above-described methods in combination with the application of the UHDTV broadcast contents. The newly defined HEVC codec-based broadcast service descriptor (HEVC_service_descriptor) may be stored in the DVB-SI table In various tables.

11 is a flowchart illustrating a method for providing an ultra high definition broadcast service according to an embodiment of the present invention.

11, an elementary stream generating unit 110 of an apparatus 100 for providing an ultra high definition broadcast service encodes UHDTV broadcast contents including at least one of a UHDTV video stream, an audio stream and a data stream in an HEVC scheme (S510 ), And generates an elementary stream including the encoded data of the UHDTV broadcast contents (S520).

The signaling information generation unit 120 of the apparatus 100 for providing an ultra high definition broadcast service generates an SI for UHDTV broadcast contents (S530).

The signaling information generation unit 120 adds a field value indicating UHDTV broadcast contents to be provided at present among the field values defined in FIG. 5 to at least one descriptor field among NIT information, SDT information, and BAT information. The signaling information generation unit 120 adds a field value indicating UHDTV broadcast contents to be provided at present among field values defined in FIG. 7 to at least one descriptor field among NIT information, SDT information, and BAT information. For example, the signaling information generation unit 120 may add at least one descriptor field among the NIT information, the SDT information, and the BAT information, a field value of 0x12 indicating a UHDTV broadcast content to be currently provided among the field values defined in FIG. 7 Can be added. Then, the signaling information generator 120 adds a HEVC codec-based broadcast service descriptor (HEVC_service_descriptor) to FIG. 8 and sets a value of a service type (HEVC_service_type) based on FIG.

Also, the signaling information generation unit 120 adds stream content and component type information to the component that constitutes the UHDTV broadcast content to be provided at present in the component descriptor (component_descriptor) field. The signaling information generation unit 120 may add stream content and component type information to the component that constitutes the UHDTV broadcast content to be provided at present based on the field value defined in FIG. 6 in the component descriptor (component_descriptor) field .

The transmitter 130 of the apparatus 100 for providing an ultra high definition broadcast service multiplexes the elementary stream generated by the elementary stream generator 110 and the SI generated by the signaling information generator 120 to generate a TS S540), and transmits the generated TS through the broadcasting network (S550).

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, Such an embodiment can be readily implemented by those skilled in the art from the description of the embodiments described above.

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 (1)

A method for providing an ultra high definition broadcast service on the basis of DVB (Digital Video Broadcasting) in an ultra high definition broadcast service providing apparatus,
Defining a super high definition broadcast stream based on a value of a vacant area in DVB-SI (Service Information)
A step of generating an elementary stream by encoding an ultra high definition broadcast stream,
Generating an SI including a service type field value indicating the super high definition broadcast stream and a stream content and a component type value for the component that constitutes the super high definition broadcast stream;
Multiplexing the elementary stream and the SI and transmitting
And providing the super high definition broadcast service.

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