KR20230053339A - Apparatus and method for converting broadcast information - Google Patents

Abstract

Disclosed are a broadcast information conversion apparatus and method. The broadcast information conversion apparatus according to an embodiment of the present invention comprises: a first signal processor which demodulates UHDTV broadcast signals received through an antenna; an information analysis unit which analyzes Low Level Signaling (LLS) and Service Layer Signaling (SLS) information corresponding to UHDTV broadcast information from the demodulated UHDTV broadcast signal; an information conversion unit which generates converted data which maps the analyzed LLS and SLS information to DTV program specific information (PSI) or program specific information protocol (PSIP) information; an information generator which generates the PSI or PSIP information corresponding to DTV broadcast information using the converted data; and a second signal processor transmitting a DTV broadcast signal modulated using the generated DTV broadcast information. Accordingly, the present invention can convert UHDTV service and program information into DTV service and program information.

Description

Apparatus and method for converting broadcasting information {APPARATUS AND METHOD FOR CONVERTING BROADCAST INFORMATION}

The present invention relates to a broadcast signal conversion technology, and more particularly, to converting broadcast service and program information provided as a UHDTV (Ultra High Definition TV) broadcast signal into broadcast service and program information provided as a DTV (Digital TV) broadcast signal It relates to a protocol conversion technology that does.

Domestic UHDTV broadcasting is provided based on ATSC 3.0 technology, and DTV is provided based on ATSC 1.0 technology. If DTV broadcasting ends in the future, users who do not have a UHDTV receiver will not be able to watch terrestrial broadcasting. To this end, it is required to develop a master antenna TV that converts UHDTV into a DTV signal and converts the signal into a multi-unit dwelling such as an apartment and provides it to apartment houses. Information must be converted into DTV information and provided.

Meanwhile, Korean Registered Patent No. 10-2281856 "Apparatus and method for converting broadcast signal" discloses an apparatus and method for receiving a terrestrial broadcast signal, converting the terrestrial signaling signal into a cable signaling signal, and transmitting the cable broadcast signal through a cable broadcasting network. are doing

An object of the present invention is to convert UHDTV service and program information into DTV service and program information.

In addition, an object of the present invention is to provide a broadcasting service so that a device capable of receiving an existing DTV with converted information can check a channel and related information through a TV and select a desired channel through this.

In addition, an object of the present invention is to improve DTV viewer ratings by allowing households with existing DTV receivers to watch DTV without having a separate UHDTV.

To achieve the above object, an apparatus for converting broadcasting information according to an embodiment of the present invention includes a first signal processing unit demodulating a UHDTV broadcasting signal received through an antenna; an information analyzer for analyzing and analyzing Low Level Signaling (LLS) and Service Layer Signaling (SLS) information corresponding to UHDTV broadcasting information in the demodulated UHDTV broadcasting signal; an information converter generating converted data mapped to program specific information (PSI) or program specific information protocol (PSIP) information of a DTV corresponding to the analyzed LLS and SLS information; and an information generating unit generating the PSI or PSIP information corresponding to DTV broadcasting information using the converted data and a second signal processing unit transmitting a modulated DTV broadcasting signal using the generated DTV broadcasting information.

The present invention can convert UHDTV service and program information into DTV service and program information.

In addition, according to the present invention, a device capable of receiving an existing DTV with the converted information can check a channel and related information through a TV, and can provide a broadcasting service so that a desired channel can be selected through this.

In addition, the present invention can improve DTV viewer ratings because even a household having an existing DTV receiver can watch DTV without having a separate UHDTV.

1 is a block diagram showing a broadcasting information conversion apparatus according to an embodiment of the present invention.
2 is a block diagram illustrating a broadcast conversion device applied to broadcast information conversion between UHDTV and DTV according to an embodiment of the present invention.
FIG. 3 is a detailed block diagram of an example of an information analysis unit, an information conversion unit, and an information generation unit shown in FIG. 1 .
4 is an operational flowchart illustrating a method for converting broadcast information according to an embodiment of the present invention.
5 is a diagram illustrating a correspondence relationship between UHDTV and DTV broadcasting information according to an embodiment of the present invention.
6 is a diagram illustrating a mapping relationship between an SLT of a UHDTV LLS and a DTV PSI PAT according to an embodiment of the present invention.
7 is a diagram showing fields constituting PAT of DTV PSI corresponding to fields related to UHDTV LLS/SLS according to an embodiment of the present invention.
8 is a diagram showing fields constituting PMT of DTV PSI corresponding to fields associated with UHDTV LLS/SLS according to an embodiment of the present invention.
9 is a diagram illustrating stream type values indicating contentType of UHDTV according to an embodiment of the present invention.
10 is a diagram showing in detail the relationship between a PMT table and a field of the PMT table according to an embodiment of the present invention and an SLT field of UHDTV.
11 is a diagram showing fields constituting VCT of DTV PSIP corresponding to fields associated with UHDTV LLS/SLS according to an embodiment of the present invention.
12 is a diagram illustrating an association between an SLT field of UHDTV LLS/SLS and a VCT field of DTV PSIP according to an embodiment of the present invention.
13 is a diagram illustrating a relationship between serviceCategory of UHDTV ATSC 3.0 and service_type of DTV ATSC 1.0 according to an embodiment of the present invention.
14 is a diagram showing fields constituting STT of DTV PSIP corresponding to fields related to UHDTV LLS/SLS according to an embodiment of the present invention.
15 is a diagram showing the relationship between syntax and field values of a UHDTV System Time fragment and STT of DTV PSIP according to an embodiment of the present invention.
16 is a diagram showing fields constituting RRT of DTV PSIP corresponding to fields related to UHDTV LLS/SLS according to an embodiment of the present invention.
17 is a diagram illustrating an association between an RRT field of UHDTV LLS and an RRT field of DTV PSIP according to an embodiment of the present invention.
18 is a diagram showing a computer system according to an embodiment of the present invention.

The present invention will be described in detail with reference to the accompanying drawings. Here, repeated descriptions, well-known functions that may unnecessarily obscure the subject matter of the present invention, and detailed descriptions of configurations are omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clarity.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

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

1 is a block diagram showing a broadcasting information conversion apparatus according to an embodiment of the present invention.

The apparatus for converting broadcast information according to an embodiment of the present invention shown in FIG. 1 may correspond to public viewing equipment, and may typically correspond to MATV (Master Antenna TV).

UHDTV can provide not only high-definition TV (HDTV: High Definition TV) but also UHD (Ultra High Definition) video with 4K resolution through a broadcasting network by applying ATSC 3.0 technology. UHDTV is being transmitted simultaneously with DTV, but when DTV transmission ends, users who have existing TVs that can only receive DTV cannot watch terrestrial TV. In this case, public viewing equipment that receives UHDTV signals and converts them into DTV signals can be an alternative. The present invention relates to public viewing equipment capable of receiving and converting the above-mentioned UHDTV broadcasting signals into DTV signals and providing DTV signals to multi-unit dwellings such as apartments, specifically, services and programs corresponding to UHDTV broadcasting information. Information may be converted into service and program information corresponding to DTV broadcast information and provided.

Referring to FIG. 1, an apparatus for converting broadcast information according to an embodiment of the present invention includes a first signal processor 110, an information analyzer 120, an information converter 130, an information generator 140, and a second signal processor 110. It includes a signal processing unit 150.

The first signal processing unit 110 may demodulate the UHDTV signal received through the antenna.

At this time, the first signal processor 110 may receive and demodulate a UHDTV broadcast signal based on the ATSC 3.0 standard.

At this time, the first signal processing unit 110 demodulates a PLP (Physical Layer Pipe) that transmits the service, demultiplexes video or audio packets (or streams, or data), which are components constituting the service, and It can also demultiplex service and program information needed to identify that service.

At this time, the first signal processing unit 110 may demultiplex information constituting a service and related streams by processing a physical layer and a link layer from the RF signal.

At this time, the first signal processor 110 may extract UHDTV service and program information.

To this end, the first signal processing unit 110 may extract LLS data and SLS data transmitted through the UHDTV network and transmit them to the information analysis unit 120 .

At this time, the first signal processing unit 110 extracts the LLS first, and then accesses the SLS data using identification information (IP address and port) that transmits the SLS through the SLS identification information specified in the LLS to extract the corresponding data. there is.

The information analyzer 120 may analyze Low Level Signaling (LLS) and Service Layer Signaling (SLS) information corresponding to UHDTV broadcasting information in the demodulated UHDTV broadcasting signal.

At this time, the information analyzer 120 may analyze an LLS that provides multiplexing information of a service provided through the UHDTV broadcasting network and identification information necessary to access the corresponding service, and an SLS that carries additional information about the corresponding service.

The LLS and SLS information may include access information necessary for a receiver to identify transmitted services and extract components constituting each service.

At this time, the information analysis unit 120 analyzes the table and data structure (fragment) of the LLS transmitted from the first signal processing unit 110, and USBD (User Service Bundle Description) and S-TSID (S-TSID) corresponding to the SLS Service-based Transport Session Instance Description) fragments can be analyzed.

At this time, the information analysis unit 120 may transmit field values of each analyzed table or data structure (description) to the information conversion unit 130 .

The information conversion unit 130 may generate converted data by mapping the analyzed LLS and SLS information to program specific information (PSI) or program specific information protocol (PSIP) information of the DTV corresponding to the analyzed LLS and SLS information.

At this time, the information conversion unit 130 may generate converted data to generate service and program information required by the DTV using the data received from the information analysis unit 120 .

At this time, the information conversion unit 130 may designate field values analyzed in the UHDTV as they are for each field value required to generate the PAT corresponding to the PSI of the DTV, and, if necessary, fill in appropriate values or values corresponding thereto. can

At this time, the information conversion unit 130 may store the converted data in a specific data structure or database.

At this time, the information conversion unit 130 may be transferred separately from the converted data stored in the database, or may be used to generate a PSI or PSIP table by accessing the database from the information generation unit 140.

The information generating unit 140 may generate the PSI or PSIP information corresponding to DTV broadcasting information using the converted data.

At this time, the information generating unit 140 uses the converted data generated by the information converting unit 130 to use PSI or PSIP complying with the ATSC 1.0 standard, which is service and program information corresponding to DTV broadcasting information required by DTV. table can be created.

At this time, the information generating unit 140 may generate PSI or PSIP information by directly mapping the DTV PSI or PSIP table from the UHDTV LLS or SLS to the corresponding field value, or by configuring the corresponding field value by referring to it.

The second signal processor 150 may transmit a modulated DTV broadcasting signal using the generated DTV broadcasting information.

At this time, the second signal processing unit 150 may modulate the generated PSI or PSIP table into a DTV broadcasting signal conforming to the ATSC 1.0 standard and transmit the modulated signal.

At this time, the second signal processing unit 150 multiplexes the TS packets including the generated PSI or PSIP tables and the TS packets constituting video, audio, or other services, and then generates a DTV signal, that is, an RF signal that satisfies the ATSC 1.0 standard. can be generated and output.

At this time, the second signal processing unit 150 may distribute the generated RF signal through the output terminal of the device and provide it to each house.

2 is a block diagram illustrating a broadcast conversion device applied to broadcast information conversion between UHDTV and DTV according to an embodiment of the present invention.

Referring to FIG. 2 , it can be seen that the tables or fragments constituting the LLS of UHDTV are directly mapped or referenced to the PSI or PSIP table of DTV.

In addition, it can be seen that the SLS can be appropriately configured by directly mapping or referring to corresponding field values when generating the PSIP table.

FIG. 3 is a detailed block diagram of an example of an information analysis unit, an information conversion unit, and an information generation unit shown in FIG. 1 .

Referring to FIG. 3 , the information analyzer 120 may include a UHDTV LLS decoder block and a UHDTV SLS decoder block.

The UHDTV LLS decoder block can decode (interpret) SLT, RRT, System Time fragment, AEAT, OnScreenMessageNotification, and SignedMultiTable.

At this time, the UHDTV LLS decoder block can acquire the transmitted service type, service name, and information for accessing components constituting the corresponding service through the SLT.

At this time, the UHDTV LLS decoder block may obtain regional grade information through RRT.

At this time, the UHDTV LLS decoder block can obtain system time related information through the System Time fragment.

The disaster alert includes AEAT, and the UHDTV LLS decoder block can derive information necessary for presentation by interpreting a table or data fragment corresponding to AEAT.

The UHDTV SLS decoder block can analyze description data such as USBD, S-TSID, MPD (Manifest Presentation Description), and MPT (MMT Package Table).

The SLS provides additional information related to a specific service, and detailed information for each service and access information for a transport channel conveyed by components constituting each service may be provided. Such access information may be provided through S-TSID in case of ROUTE-based service, and related detailed information through MPT in case of MMTP (MPEG Media Transport Protocol)-based service.

At this time, the SLS decoder block may derive information necessary for service presentation by interpreting the description.

The information conversion unit 130 may generate values of fields required to generate the PSI or PSIP table of the DTV.

At this time, the information conversion unit 130 organizes each field value in the DTV PSI or PSIP table into a data structure, for example, and then directly assigns the corresponding field value from a field of LLS or SLS provided from UHDTV. Alternatively, you can refer to it and assign a value arbitrarily.

At this time, the information conversion unit 130 may create a separate data structure or create and manage a database.

At this time, the information conversion unit 130 may perform the conversion process by simultaneously processing the DTV PSI generation block or the DTV PSIP generation block.

The information generator 140 may include a DTV PSI generation block and a DTV PSIP generation block.

The DTV PSI generation block may generate a PSI table such as PAT, PMT or NIT.

PSI information is a table defined in MPEG. When a service (generally a video program) is to be transmitted by applying the MPEG-2 system, the broadcasting company providing the program, the program, and the media elementary stream constituting the program Information for providing related information may include PAT, PMT or NIT.

At this time, the DTV PSI generation block is a block for generating such a PAT, PMT or NIT and can generate a table satisfying the ATSC 1.0 standard.

At this time, the DTV PSI generation block may designate an appropriate value by directly mapping or referring to a field value of the UHDTV LLS or SLS to a specific field of the corresponding table.

PSIP information is information required for a series of viewing operations, such as a user checking service information and selecting a desired channel, and may include MGT, VCT, RRT, STT, EIT, and the like.

At this time, the DTV PSIP generation block may generate PSIP information using the converted data generated by the information conversion unit 130 to generate the PSIP table.

At this time, if a specific field cannot be referred to in the converted data, the DTV PSIP generation block can be generated by directly specifying an arbitrary value.

4 is an operational flowchart illustrating a method for converting broadcast information according to an embodiment of the present invention.

Referring to FIG. 4 , the method for converting broadcasting information according to an embodiment of the present invention may first process a UHDTV broadcasting signal (S210).

That is, in step S210, the UHDTV broadcast signal received through the antenna may be demodulated.

At this time, in step S210, a UHDTV broadcasting signal based on the ATSC 3.0 standard may be received and demodulated.

At this time, step S210 demodulates the PLP (Physical Layer Pipe) that transmits the service to demultiplex video or audio packets (or streams or data), which are components constituting the service, and also It is possible to demultiplex the service and program information necessary to identify.

At this time, in step S210, information constituting a service and related streams may be demultiplexed by processing a physical layer and a link layer from the RF signal.

At this time, in step S210, UHDTV service and program information may be extracted.

To this end, in step S210, LLS data and SLS data transmitted through the UHDTV network may be extracted and transmitted to the information analyzer 120.

At this time, in step S210, after extracting the LLS first, the corresponding data may be extracted by accessing the SLS data using identification information (IP address and port) that transmits the SLS through the SLS identification information specified in the LLS.

In addition, the method for converting broadcasting information according to an embodiment of the present invention may analyze UHDTV broadcasting information (S220).

That is, in step S220, Low Level Signaling (LLS) and Service Layer Signaling (SLS) information corresponding to UHDTV broadcasting information may be analyzed in the demodulated UHDTV broadcasting signal.

At this time, in step S220, an LLS providing multiplexing information of a service provided through the UHDTV broadcasting network and identification information required to access the corresponding service and an SLS carrying additional information about the corresponding service may be analyzed.

The LLS and SLS information may include access information necessary for a receiver to identify transmitted services and extract components constituting each service.

At this time, in step S220, the LLS table and data structure (fragment) transmitted from the first signal processor 110 are analyzed, and USBD (User Service Bundle Description) and S-TSID (Service- based Transport Session Instance Description) fragments can be analyzed.

At this time, in step S220, field values of each analyzed table or data structure (description) may be transmitted to the information conversion unit 130.

In addition, the method for converting broadcast information according to an embodiment of the present invention may convert UHDTV service and program information (S230).

That is, in step S230, converted data mapped to Program Specific Information (PSI) or Program Specific Information Protocol (PSIP) information of the DTV corresponding to the analyzed LLS and SLS information may be generated.

At this time, in step S230, data received from the information analyzer 120 may be used to generate converted data to generate service and program information required by the DTV.

At this time, in step S230, field values analyzed in the UHDTV may be designated as field values required for PAT generation corresponding to the PSI of the DTV, and may be filled with appropriate values or values corresponding thereto, if necessary. .

At this time, in step S230, the converted data may be stored in a specific data structure or database.

At this time, in step S230, the converted data stored in the database may be transmitted separately or may be used to create a PSI or PSIP table by accessing the database in the information generating unit 140.

In addition, the broadcasting information conversion method according to an embodiment of the present invention may generate DTV broadcasting information (S240).

That is, in step S240, the PSI or PSIP information corresponding to DTV broadcasting information may be generated using the converted data.

At this time, in step S240, a PSI or PSIP table complying with the ATSC 1.0 standard, which is service and program information corresponding to DTV broadcasting information requested by DTV, is generated using the converted data generated by the information conversion unit 130. can create

At this time, in step S240, PSI or PSIP information may be generated by directly mapping the DTV PSI or PSIP table from the UHDTV LLS or SLS to the corresponding field value, or configuring the corresponding field value by referring to it.

In addition, the method for converting broadcast information according to an embodiment of the present invention may process a DTV broadcast signal (S250).

That is, in step S250, a DTV broadcasting signal modulated by using the generated DTV broadcasting information may be transmitted.

At this time, in step S250, the generated PSI or PSIP table may be modulated into a DTV broadcasting signal conforming to the ATSC 1.0 standard and transmitted.

At this time, step S250 multiplexes the TS packets including the generated PSI or PSIP table with the TS packets constituting the video, audio, or other services, and then generates a DTV signal, that is, an RF signal that satisfies the ATSC 1.0 standard. can be printed out.

At this time, in step S250, the generated RF signal may be distributed through an output terminal of the device and provided to each house.

5 is a diagram illustrating a correspondence relationship between UHDTV and DTV broadcasting information according to an embodiment of the present invention.

Referring to FIG. 5 , it can be seen that the SLT constituting the LLS of UHDTV is used to generate a PAT, PMT or PSIP VCT corresponding to the PSI of DTV.

It can be seen that RRT (Rating Region Table) of UHDTV LLS is mapped to RRT of DTV PSIP.

It can be seen that the System Time fragment of the UHDTV LLS is mapped to the System Time Table (STT) of the DTV PSPI.

It can be seen that USBD and T-STID of UHDTV SLS are mapped to PMT or VCT of DTV PSI.

Since an Electronic Program Guide (EPG) provided by DTV is generated using an Event Information Table (EIT), the EIT can be generated directly or indirectly from service announcement data of UHDTV.

6 is a diagram illustrating a mapping relationship between an SLT of a UHDTV LLS and a DTV PSI PAT according to an embodiment of the present invention.

Referring to FIG. 6 , it can be seen that the concept of mapping a specific field value constituting the SLT (Service List Table) of the UHDTV LLS to the PAT field of the DTV PSI is shown.

The PAT of the DTV PSI may be generated by configuring a corresponding field such as program_association_section().

@bsid, which is an attribute constituting the SLT, is a broadcast stream identifier, and the attribute value may be linked to network_PID (NIT: Network Information Table) of the PAT.

Also, @serviceid of SLT may be mapped to program_number of PAT.

Other @majorChannelNo, @minorChannelNo or @hidden fields of SLT can be mapped to VCT of PSIP.

And, it can be seen that @slsDestinationIpAddress, @slsDestinationUdpPort, or @slsSourceIpAddress fields of SLT are related to PID of PMT (PMT PID) of PAT.

In this way, information of LLS or SLS of UHDTV may be directly mapped to PSI or PSIP information of DTV or may be generated by constructing a field with indirect reference.

7 is a diagram showing fields constituting PAT of DTV PSI corresponding to fields related to UHDTV LLS/SLS according to an embodiment of the present invention.

Referring to FIG. 7 , it can be seen that main fields among the fields constituting the PAT of the DTV PSI are enumerated, indicating fields constituting the PAT that can be generated by the information conversion unit 130 . Among the fields of the PAT, the values of transport_stream_id, program_number, network PID or PMT PID must be determined. Transport_stream_id is assigned a value of '0x0000' by default, and the program_number field is mapped to the serviced value of SLT. can know that

network_PID can be mapped using the bsid value of LST or designated by referring to the corresponding value.

Also, an arbitrary PID may be assigned to the PMT PID. At this time, after designating the PMT PID in advance, if there are more than one program, sequential numbers may be allocated. The PAT grammar is as shown in FIG. 6, and data constituting the PAT section can be designated in the same form.

8 is a diagram showing fields constituting PMT of DTV PSI corresponding to fields associated with UHDTV LLS/SLS according to an embodiment of the present invention.

Referring to FIG. 8, the list of the aforementioned PMT fields includes program_number, PCR_PID, stream_type, elementary_PID, AC-3 audio descriptor, component name descriptor, redistribution control descriptor, E-AC-3_audio_stream_descirptor, caption service descriptor, or caption service descriptor. Can include content advisory descriptor, etc.

Field values constituting the PMT may be directly mapped with reference to the S-TSID of UHDTV or arbitrarily designated with reference to it.

The program_number of the PMT corresponds to a value specified in the PAT.

PCR_PID can generally use the same PID as video and can be designated by referring to the <LS> element of the S-TSID.

The stream_type of the PMT may be designated as a value defined in DTV by referring to the @contentType attribute value of the <SrcFlow> element of the S-TSID.

9 is a diagram illustrating stream type values indicating contentType of UHDTV according to an embodiment of the present invention.

Referring to FIG. 9, it can be seen that '0x02', that is, MPEG-2 video, is designated when the contentType is video in UHDTV. If it is audio, it can be seen that '0x81' value indicating AC-3 audio is designated.

Elementary_PID of the PMT can be arbitrarily designated by referring to <SrcFlow> @contentType of S-TSID, and each PID value can be designated as 0x0110 (video), 0x0120 (audio), and 0x0110 (PCR), for example.

The PCR PID value may be designated as a PID value different from that of the video, that is, '0x0130' for example, but generally the same value as the elementary PID of the video may be designated.

In the case of descriptors, the descriptors specified in FIG. 8 may be located inside the PMT loop, and the corresponding descriptors may be generated by conforming to the DTV standard.

10 is a diagram showing in detail the relationship between a PMT table and a field of the PMT table according to an embodiment of the present invention and an SLT field of UHDTV.

Referring to FIG. 10 , it can be seen that the above-mentioned PMT table and the relationship between fields of the PMT table and SLT fields of UHDTV are shown.

The PMT of the DTV PSI may be generated by directly mapping or referencing a field value from the SLT of the UHDTV LLS and the S-TSID of the SLS and constructing a corresponding field.

11 is a diagram showing fields constituting VCT of DTV PSIP corresponding to fields associated with UHDTV LLS/SLS according to an embodiment of the present invention.

Referring to FIG. 11, regarding the VCT of the DTV PSIP, it can be seen that the VCT is assigned a value by directly mapping or referring to a field of the SLT of the UHDTV LLS.

12 is a diagram illustrating an association between an SLT field of UHDTV LLS/SLS and a VCT field of DTV PSIP according to an embodiment of the present invention.

Referring to FIG. 12, the VCT of the DTV PSIP may be generated by configuring a corresponding field by directly mapping or referencing a corresponding field value of virtual_channel_table_section() to a field value of SLT of UHDTV LLS as illustrated in FIG. 11. .

The transport_stream_id of the VCT should be assigned a value of '0x0000' by default. Since the value of the num_channels_in_section field indicates the number of channels, '0x01' can be designated in the case of a single channel.

In the case of DTV broadcasting, since it is generally a single channel, '0x01' can be designated. Next, since short_name is a channel name consisting of seven characters, the SLT's @shortServiceName attribute value can be mapped as it is.

In addition, major_channel_number corresponding to the channel number may be directly mapped to the @majorChannelNo value of SLT, and minor_channel_number to the @minorChannelNo value of SLT.

For modulation_mode and carrier_frequency, a corresponding modulation method and frequency value may be designated.

channel_TSID is a broadcaster identifier, and the @bsid value of SLT can be directly mapped.

program_number is a program number, and the @serviceId value of SLT can be designated as it is.

ETM_location is an extended message, and if necessary, a corresponding message field may be configured and provided.

Hidden is a field indicating a channel that does not need to be visible to the user, and the @hidden value of SLT can be mapped as it is.

hide_guide indicates whether the hidden channel's EPG is displayed. Since there is no corresponding field corresponding to SLT, it can be arbitrarily designated. If EPG is not displayed in public viewing equipment, it can be designated as a corresponding value.

13 is a diagram illustrating a relationship between serviceCategory of UHDTV ATSC 3.0 and service_type of DTV ATSC 1.0 according to an embodiment of the present invention.

service_type can map @serviceCategory of SLT. Specifically, ATSC_digital_television, that is, '0x02' value when UHDTV service is Linear A/V service, and ATSC_audio service defined as '0x03' when linear audio only service is used. can be mapped.

In the case of an app-base service, mapping to ATSC_data_only_service "0x04" is possible, but the data service specifications are different, so it may not be easy to convert the app-base service to ATSC_data_only_service and provide it in reality.

Since the source_id corresponds to an identifier for interworking with the EIT, an arbitrary value may be designated when generating the EIT.

The VCT may include an extended channel name descriptor, service location descriptor, or time-shifted service descriptor in the VCT descriptor loop, and related descriptors may also be necessarily included. For example, the extended channel name descriptor may be generated by referring to the <name> element of USBD.

In addition, the service location descriptor may be generated by referring to the <LS> element of the S-TSID.

The time-shifted service descriptor can be created with an arbitrary value because there is no related field.

14 is a diagram showing fields constituting STT of DTV PSIP corresponding to fields related to UHDTV LLS/SLS according to an embodiment of the present invention.

Referring to FIG. 14, it can be seen that field values such as system_time, GPS_UTC_offset, and daylight_savings are generated by referring to the System Time fragment of UHDTV as data fields of STT of DTV PSIP.

Specifically, the system_time field can be created by referring to @currentUtcOffset, @leap59, and @leap61 of the System Time fragment of LLS.

In addition, GPS_UTC_offset may be generated by referring to the @utcLocalOffset value of the System Time fragment of the LLS.

In addition, daylight_savings can be created by referring to @dsStatus, @dsDayOfMonth, and @dsHour of System Time fragment as daylight adjustment time.

15 is a diagram showing the relationship between syntax and field values of a UHDTV System Time fragment and STT of DTV PSIP according to an embodiment of the present invention.

Referring to FIG. 15, it can be seen that an association relationship capable of mapping UHDTV System Time fragments and syntax and field values of STT of DTV PSIP is shown.

The STT of the DTV PSIP may be generated by configuring a corresponding field by directly mapping or referring a corresponding field value of system_time_table_section() to a field value of the System Time fragment of UHDTV LLS as shown in FIG. 14.

16 is a diagram showing fields constituting RRT of DTV PSIP corresponding to fields related to UHDTV LLS/SLS according to an embodiment of the present invention.

Referring to FIG. 16, it can be seen that rating_region, rating_region_name_text(), dimensions_defined, dimension_name_text(), gradulated_scale, value_defined, abbrev_rating_value_text(), rating_value_text(), etc. are appropriately specified as data fields of RRT of DTV PSIP.

17 is a diagram illustrating an association between an RRT field of UHDTV LLS and an RRT field of DTV PSIP according to an embodiment of the present invention.

Referring to FIG. 17, it can be seen that the classification of RRT of DTV PSIP and RRT of UHDTV LLS and correlation between corresponding fields are shown. As shown in FIGS. 16 and 17, each field constituting the RRT of the DTV PSIP may be appropriately mapped and designated from the RRT of the UHDTV LLS.

The RRT of the DTV PSIP may be generated by configuring corresponding fields by directly mapping or referencing corresponding field values of rating_region_table_section() to RRT field values of UHDTV LLS as shown in FIG. 16 .

For example, rating_region may be directly mapped to a value using the @regionIdentifier value of UHDTV RRT as it is.

rating_region_name_text() can be directly mapped to a value using the RegionIdText value of UHDTV RRT as it is.

In dimension_defined, the number of dimensions can be directly mapped to the Dimension element of UHDTV RRT.

dimension_name_text() can be directly mapped to DimensionTitle of UHDTV RRT.

gradulated_scale can be directly mapped to the @diemensionGraduated value of UHDTV RRT.

Also, value_defined can be directly mapped to the @ratingValue value of UHDTV RRT.

abbrev_rating_value_text() may be directly mapped to the RatingValueAbbrev value of UHDTV RRT.

rating_value_text() can also be used directly as the RatingValueString value of UHDTV RRT, so that the value can be directly mapped.

18 is a diagram showing a computer system according to an embodiment of the present invention.

Referring to FIG. 18 , the apparatus for converting broadcasting information according to an embodiment of the present invention may be implemented in a computer system 1100 such as a computer-readable recording medium. As shown in FIG. 4, the computer system 1100 includes one or more processors 1110, memory 1130, user interface input device 1140, and user interface output device 1150 communicating with each other through a bus 1120. and storage 1160 . In addition, computer system 1100 may further include a network interface 1170 coupled to network 1180 . The processor 1110 may be a central processing unit or a semiconductor device that executes processing instructions stored in the memory 1130 or the storage 1160 . The memory 1130 and the storage 1160 may be various types of volatile or non-volatile storage media. For example, the memory may include ROM 1131 or RAM 1132 .

According to the broadcasting information conversion apparatus and method according to an embodiment of the present invention, when DTV broadcasting is discontinued in the future, a user with an existing DTV receiver can watch terrestrial TV through a device that converts UHDTV signals into DTV signals. One method for this is to supply UHDTV to DTV signals through a public viewing device. For this purpose, a public viewing device must convert (transcode) video or audio data and at the same time convert and provide related service or program information. The present invention is related to this. After receiving and analyzing service and program information provided through a UHDTV broadcasting network, necessary fields are derived and organized from DTV service and program information, and then a PSI or PSIP table required by DTV is generated using this. can do. In this case, a specific field value of the PSI or PSIP table can be directly mapped to a field value of the LLS or SLS of UHDTV, but otherwise, the corresponding table can be created by designating an arbitrary value with reference to it. The PSI or PSIP table generated through the above process may be multiplexed with a video or audio TS packet, modulated into a DTV RF signal, and provided. This is referred to as public viewing equipment, and if the equipment is used, even a home with an existing DTV receiver can watch DTV without having to have a separate UHDTV, thereby improving DTV ratings.

As described above, the broadcast information conversion apparatus and method according to an embodiment of the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments can be modified in various ways. All or part of each embodiment may be configured by selectively combining them.

110: first signal processing unit 120: information analysis unit
130: information conversion unit 140: information generation unit
150: second signal processing unit
1100: computer system 1110: processor
1120: bus 1130: memory
1131: Rom 1132: Ram
1140: user interface input device
1150: user interface output device
1160: storage 1170: network interface
1180: Network

Claims (1)

a first signal processing unit demodulating the UHDTV broadcast signal received through the antenna;
an information analyzer for analyzing and analyzing Low Level Signaling (LLS) and Service Layer Signaling (SLS) information corresponding to UHDTV broadcasting information in the demodulated UHDTV broadcasting signal;
an information converter generating converted data mapped to program specific information (PSI) or program specific information protocol (PSIP) information of a DTV corresponding to the analyzed LLS and SLS information;
an information generating unit generating the PSI or PSIP information corresponding to DTV broadcasting information using the converted data; and
a second signal processor for transmitting a modulated DTV broadcasting signal using the generated DTV broadcasting information;
Broadcasting information conversion device characterized in that it comprises a.

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