KR102383598B1 - Broadcast receiving apparatus and signal processing method thereof - Google Patents

Abstract

A broadcast receiving apparatus and a signal processing method thereof are disclosed. A broadcast reception apparatus according to the present invention includes a receiver for receiving a data stream composed of a plurality of PLPs (Physical Layer Pipe), and demodulates a plurality of PLPs included in a data stream received from the receiver, and at least corresponding to each of the plurality of PLPs. A demodulator that generates and outputs one generic packet and additional information on at least one generic packet, and a signal processor that performs signal processing on at least one generic packet based on the output additional information . Accordingly, the broadcast receiving device may provide a broadcast service suitable for a broadcast standard standard for providing various broadcast services.

Description

Broadcast receiving device and signal processing method thereof {BROADCAST RECEIVING APPARATUS AND SIGNAL PROCESSING METHOD THEREOF}

The present invention relates to a broadcast reception apparatus and a signal processing method thereof, and more particularly, to a broadcast reception apparatus and a signal processing method for receiving an image signal conforming to a digital broadcast standard.

In the information society of the 21st century, broadcasting and communication services are facing the era of full-scale digitalization, multi-channelization, broadband, and high quality. In particular, as the distribution of high-definition digital TVs, PMPs, and portable broadcasting devices has recently expanded, the demand for digital broadcasting services to support various reception methods is also increasing.

In response to these demands, the standards group is trying to provide various services that can satisfy the needs of users by enacting various standards. Accordingly, there is a need to seek development of a broadcast receiving apparatus suitable for a standard for providing such various services.

SUMMARY OF THE INVENTION The present invention has been devised in response to the above-mentioned necessity, and an object of the present invention is to provide a broadcast receiving apparatus and a signal processing method suitable for a broadcast standard standard for providing various broadcast services.

According to an exemplary embodiment for achieving the above object, a broadcast reception device includes a receiving unit for receiving a data stream composed of a plurality of physical layer pipes (PLPs), and the plurality of PLPs included in the data stream received from the receiving unit. A demodulator that demodulates , generates and outputs at least one generic packet corresponding to each of the plurality of PLPs and additional information on the at least one generic packet, and the at least one based on the outputted additional information and a signal processing unit that performs signal processing on one generic packet.

In addition, the additional information may be information used for reconstructing a payload in a higher layer or for signal processing among information not included in the header information of the generic packet.

In addition, the additional information includes sync code information indicating the start of the generic packet, valid information for determining whether an output time of multimedia data for the generic packet is valid, error information, and identification information for each of the plurality of PLPs and at least one of ranking information indicating an order of each of the plurality of PLPs.

In addition, each of the sync code information, the valid information, the error information, the identification information, and the priority information may be allocated with a specific bit size within one byte.

In addition, the additional information further includes time information for outputting multimedia data for the generic packet, and the time information may be allocated with a specific bit size within 6 bytes.

and first and second interface units for outputting the generic packet-related data to the signal processing unit, wherein the demodulator inserts additional information of the generic packet into the generic packet, and inserts the additional information into the generic packet. At least one of packet-related data, clock information, and valid information may be output to the first interface unit, and sync information indicating the start of a generic packet in which the additional information is inserted may be outputted to the second interface unit.

The apparatus further includes first and second interface units for outputting the generic packet-related data to the signal processing unit, wherein the demodulator outputs at least one of the generic packet-related data, clock information, and valid information to the first The interface unit may output at least one of sync information indicating the start of the generic packet and additional information on the generic packet to the second interface unit.

In addition, the signal processing unit, if the additional information output from at least one of the first and second interface unit includes error information, according to the error information, a generic packet of the additional information at a different decoding processing level according to the error information. decoding can be performed.

On the other hand, the signal processing method of the broadcast receiving apparatus according to another embodiment of the present invention comprises the steps of receiving a data stream composed of a plurality of PLPs, demodulating the plurality of PLPs included in the data stream received from the receiver, and the generating and outputting at least one generic packet corresponding to each of a plurality of PLPs and additional information on the at least one generic packet, and performing signal processing on the at least one generic packet based on the additional information includes

In addition, the additional information may be information used for reconstructing a payload in a higher layer or for signal processing among information not included in the header information of the generic packet.

In addition, the additional information includes sync code information indicating the start of the generic packet, valid information for determining whether an output time of multimedia data for the generic packet is valid, error information, identification information for each of the plurality of PLPs, and It may include at least one of ranking information indicating the order of each of the plurality of PLPs.

In addition, each of the sync code information, the valid information, the error information, the identification information, and the priority information may be allocated with a specific bit size within one byte.

In addition, the additional information further includes time information for outputting multimedia data for the generic packet, and the time information may be allocated with a specific bit size within 6 bytes.

In the outputting step, the additional information of the generic packet is inserted into the generic packet, and at least one of data related to the generic packet into which the additional information is inserted, clock information, and valid information is transmitted to the first interface unit. Sync information indicating the start of the generic packet in which the additional information is inserted may be output through the second interface unit.

In addition, the outputting includes outputting at least one of the generic packet related data, clock information, and valid information through the first interface unit, and sync information indicating the start of the generic packet and the generic packet. At least one of the additional information may be output through the second interface unit.

And, in the step of performing the signal processing, if error information is included in the additional information output from at least one of the first and second interface units, the error information includes a different decoding processing level for the additional information. Decoding of packets may be performed.

As described above, according to various embodiments of the present disclosure, a broadcast receiving device may provide a broadcast service conforming to a broadcast standard for providing various broadcast services.

1 is a block diagram showing the configuration of a broadcast transmission apparatus according to an embodiment of the present invention;
2 is a detailed block diagram of a frame generator of a broadcast transmission apparatus according to an embodiment of the present invention;
3 is a view showing a generic packet, a generic frame, and a scrambled baseband frame according to an embodiment of the present invention;
4A is a diagram for explaining a process in which an input stream is processed as a generic frame;
4B is a diagram for explaining the relationship between the generic packet 420 and the generic frame 430;
4c is a diagram for explaining a local frame structure for each PLP;
4D is a diagram for explaining the structure of an interleaving frame;
5 is a block diagram showing a schematic configuration of a broadcast receiving apparatus according to an embodiment of the present invention;
6 is a detailed block diagram showing a detailed configuration of a broadcast receiving apparatus according to an embodiment of the present invention;
7 is an exemplary diagram showing the structure of a generic packet according to an embodiment of the present invention;
8 is a first exemplary diagram illustrating a flag structure included in additional information according to an embodiment of the present invention;
9 is a second exemplary diagram illustrating a flag structure included in additional information according to another embodiment of the present invention;
10 is an exemplary diagram illustrating a PTP structure included in additional information according to an embodiment of the present invention;
11 is a first exemplary diagram for outputting generic packet related data in a broadcast reception device according to an embodiment of the present invention;
12 is a second exemplary diagram for outputting generic packet related data in a broadcast reception device according to another embodiment of the present invention;
13 is a flowchart of a signal processing method of a broadcast transmission apparatus according to an embodiment of the present invention;
14 is a flowchart of a signal processing method of a broadcast receiving apparatus according to an embodiment of the present invention.

Before describing the present invention in detail, a description will be given of the description of the present specification and drawings.

First, terms used in the present specification and claims have been selected in consideration of functions in various embodiments of the present invention. However, these terms may vary depending on the intention of a person skilled in the art, legal or technical interpretation, and emergence of new technology. Also, some terms are arbitrarily selected by the applicant. These terms may be interpreted in the meanings defined herein, and in the absence of specific definitions, they may be interpreted based on the general content of the present specification and common technical common sense in the art.

Also, the same reference numerals or reference numerals in each drawing attached to this specification indicate parts or components that perform substantially the same functions. For convenience of description and understanding, the same reference numbers or reference numerals are used in different embodiments. That is, even though all components having the same reference number are illustrated in a plurality of drawings, the plurality of drawings do not mean one embodiment.

In addition, in this specification and claims, terms including an ordinal number such as “first” and “second” may be used to distinguish between elements. This ordinal number is used to distinguish the same or similar elements from each other, and the meaning of the term should not be construed as limited due to the use of the ordinal number. As an example, components combined with such an ordinal number should not be limited in the order of use or arrangement by the number. If necessary, each ordinal number may be used interchangeably.

In this specification, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprises" or "consisting of" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and are intended to indicate that one or more other It should be understood that this does not preclude the possibility of addition or presence of features or numbers, steps, operations, components, parts, or combinations thereof.

In an embodiment of the present invention, terms such as “module”, “unit”, “part”, etc. are terms used to refer to a component that performs at least one function or operation, and these components are hardware or software. It may be implemented or implemented as a combination of hardware and software. In addition, a plurality of "modules", "units", "parts", etc. are integrated into at least one module or chip, except when each needs to be implemented in individual specific hardware, and thus at least one processor. (not shown) may be implemented.

Also, in an embodiment of the present invention, when it is said that a part is connected to another part, this includes not only direct connection but also indirect connection through another medium. In addition, the meaning that a certain part includes a certain component means that other components may be further included, rather than excluding other components, unless specifically stated to the contrary.

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

1 is a block diagram showing the configuration of a broadcast transmission apparatus according to an embodiment of the present invention.

As shown in FIG. 1 , the broadcast transmission apparatus 100 includes a generic packet generator 110 , a frame generator 120 , a signal processor 130 , and a transmitter 140 .

The generic packet generator 110 may generate a generic packet (GP) or baseband packet (BBP) or L2 packet including header and payload data based on the input stream.

Here, the input stream may be a Transport Stream (TS), Internet Packets (IP) (eg, IPv4, IPv6), MPEG Media Transport (MMT), Generic Stream (GS), Generic Stream Encapsulation (GSE), or the like. In addition, the header may include information about payload data included in the corresponding generic packet and information about the packet included in the corresponding generic packet. Meanwhile, a generic packet (GP), a baseband packet (BBP), or an L2 packet may have a different name depending on system implementation.

In general, payload data included in the generic packet may include one of an Internet Protocol (IP) packet, a TS packet, and a signaling packet, or a combination thereof. However, the data included in the payload data is not limited to the above-described example, and may include various types of data. Here, the generic packet can be regarded as a unit packet required to map input various types of data to a physical layer.

Specifically, the generic packet generator 110 may generate a packet including a header including a field indicating a payload data type and a field indicating whether the corresponding generic packet transmits a complete input packet.

When the current packet is a single packet mode in which one Service Data Unit (SUD) is transmitted, the generic packet header includes a field indicating whether any feature or option header is used, and a field of payload in the current generic packet. It may further include a field indicating a Least Significant Bit (LSB) length. Here, the field indicating whether an arbitrary feature or option header is used includes a field indicating whether the LABEL field is present in the option header, a field indicating whether an extension header exists after the option header, and a case in which the extension header is present. It may include at least one of a field indicating the length of the extended header length and a field indicating additional information for header compression in an option header of the current generic packet.

In addition, in the single packet mode, the generic packet header includes a field indicating the MSB (Most Significant Bit) length of the payload in the current generic packet, a field indicating the length of the length of the payload in the current generic packet, and any It may further include at least one of a field indicating whether a feature of an option header or header extension is used.

In addition, the option header includes at least one of a field providing a sub-stream address, a field providing a length of an extension header following the option header, and a field including additional information for restoring a compressed service data unit currently transmitted in a generic packet. may contain one.

On the other hand, when the current packet is in a segmentation mode in which a segment of a service data unit is transmitted, the generic packet header indicates that the payload of the current generic packet transmits a segment of a service data unit, or at least one It may further include a field indicating whether to transmit a complete service data unit.

In addition, in the segmentation mode, the generic packet header includes a field indicating the length of the payload in the current generic packet, a field providing the segment identifier of the input packet transmitted in the current generic packet, and the current generic packet indicating the last segment of the input packet. It may further include at least one of a field indicating whether to transmit and a field indicating whether a feature of an optional header or header extension is used.

In addition, in the segmentation mode, the generic packet header includes a field indicating the length of the payload in the current generic packet, a field providing the segment identifier of the input packet transmitted in the current generic packet, and the current generic packet indicating the last segment of the input packet. It may further include at least one of a field indicating whether to transmit and a field indicating whether an arbitrary feature or option header is used.

In addition, in the segmentation mode, the generic packet header includes a field providing an identifier of a segmented input packet, a field indicating the length of a payload in the current generic packet, and a field providing a segment identifier of an input packet transmitted in the current generic packet and at least one of a field indicating whether the current generic packet transmits the last segment of the input packet.

On the other hand, when the current packet is in a concatenation mode in which a plurality of service data units are transmitted, the generic packet header indicates that the payload of the current generic packet transmits a segment of a service data unit, or at least one complete service data It may further include a field indicating whether the unit is transmitted.

In addition, in the case of concatenation mode, a field indicating the length of the payload in the current generic packet, a field indicating the number of input packets included in the corresponding generic packet, a field indicating the presence or absence of an option header, and the payload of the current generic packet It may further include at least one of fields indicating the length of the input packet connected to .

The frame generator 120 may generate a frame including a generic packet. Here, the generated frame may be a generic frame including a generic packet, a baseband frame (BBF), or an L1 packet. In the present invention, it is set as a generic frame.

Specifically, the frame generator 120 may arrange a plurality of generic packets including an IP packet and a header to generate a baseband frame having a size corresponding to a forward error correcting code. A generic packet (or baseband packet) according to an embodiment of the present invention may be a TS packet, but the same process may be applied to various types of data as well as the TS packet.

2 is a detailed block diagram of a frame generator of a broadcast transmission apparatus according to an embodiment of the present invention.

As shown in FIG. 2 , the frame generator 120 may include a baseband header generator 120-1 and a baseband frame generator 120-2. In addition, the frame generator 120 may transmit the generated baseband frame to the baseband frame scrambler 125 .

The generic packet generator 110 may generate a generic packet for transmission to each PLP (Physical Layer Pipe) in relation to an input mode from input IP packets, TS packets, and various types of data. . Here, the generic packet corresponds to an L2 packet in the ISO 7 layer model. That is, the generic packet generator 110 may generate the generic packet by encapsulating the input packet (IP packet, TS packet, etc.) from the input layer 2 or higher.

The generic header generator 120 - 1 may generate a header inserted into the generic frame. Here, the header inserted into the generic frame includes information about the generic frame.

In particular, when the input stream is a TS, the generic header generator 120-1 may generate a header including information on the number of TS packets in the generic packet, the number of removed null packets, and the like. In addition, the header generated by the generic header generator 120-1 may include various information, which will be described later.

Also, the generic frame generator 120-2 encapsulates the header generated by the generic header generator 120-1 into the generic packet output from the generic packet generator 110 to generate a generic frame. can do.

In addition, the generic frame scrambler 125 may generate a scrambled generic frame by mixing data stored in the generic frame in a random order before the forward error correction code is added to each generic frame. The scrambled generic frame is transmitted to the broadcast reception device 200 through the PLP to perform signal processing. In this case, one PLP may be composed of generic frames having a fixed size. That is, the input stream may be encapsulated into a generic frame for one PLP.

On the other hand, PLP refers to a signal path that is independently processed. That is, each service (eg, video, extended video, audio, data stream, etc.) may be transmitted/received through a plurality of RF channels, and the PLP is a path through which these services are transmitted or a stream transmitted through the path. . In addition, the PLP may be located in slots distributed with a temporal interval on a plurality of RF channels, or may be distributed with a temporal interval on one RF channel. That is, one PLP may be distributed and transmitted over one RF channel or a plurality of RF channels with time intervals.

The PLP structure consists of Input mode A, which provides one PLP, and Input mode B, which provides multiple PLPs. In particular, when Input mode B is supported, it is possible to provide strong specific services as well as distributed transmission of one stream. By doing so, a time diversity gain can be obtained by increasing the time interleaving length. In addition, when only a specific stream is received, the receiver is turned off for the rest of the time so that it can be used with low power, which is suitable for providing portable and mobile broadcasting services.

Here, in order to reduce the deterioration of transmission quality in a mobile communication transmission line, time diversity is a method in which when the transmitting side transmits the same signal several times at a predetermined time interval, the receiving side resynthesizes these received signals to obtain good transmission quality. it is technology

In addition, transmission efficiency can be increased by including information that can be commonly transmitted to a plurality of PLPs in one PLP and transmitting it. PLP 0 plays such a role, and this PLP is called a common PLP, The remaining PLPs (PLP 1 to PLP 3) other than 0 may be used for data transmission, and these PLPs are referred to as data PLPs. When such a PLP is used, it is possible to provide SDTV programs not only for receiving HDTV programs at home, but also for carrying and moving SDTV programs. In addition, it is possible to provide not only various broadcasting services to viewers through a broadcasting station or a broadcasting content provider, but also a differentiated service capable of receiving broadcasting even in hard-to-view areas where viewing is difficult.

3 is a diagram illustrating a generic packet, a generic frame, and a scrambled baseband frame according to an embodiment of the present invention.

As shown in FIG. 3 , when the generic packet generator 110 stores the TS packet in the payload and inserts a header to generate a plurality of generic packets 111 and 112 , the generic frame generator 120 generates the generated A plurality of generic frames 121 and 122 may be generated by grouping the plurality of generic packets 111 and 112 and inserting a header. Here, each of the begeneric frames 121 and 122 may include a plurality of generic packets and may also include a part of the generic packets.

Meanwhile, the generic frame scrambler 125 may randomly scramble each of the generated generic frames 121 and 122 to generate a plurality of scrambled generic frames 125 - 1 . In addition, the generated scrambled generic frame is transmitted to the PLP as described above, and signal processing for adding a forward error coding code may be performed.

Referring back to FIG. 2 , the signal processing unit 130 may signal-process the generated frame. Here, the generated frame may mean a generic frame as described above. Specifically, the signal processing unit 130 may generate a transmission frame by signal processing the generic frame. Also, the signal processing unit 130 may insert signaling information into the signaling region of the frame. The signaling region of such a generic frame will be described in detail below.

The transmitter 140 transmits the transmission frame signal-processed by the signal processor 130 to the broadcast reception device 200 . Here, the signal-processed transmission frame may be a frame in the form of a data stream including a plurality of PLPs composed of generic frames.

Accordingly, the transmitter 140 performs modulation to modulate a frame of a data stream including a plurality of PLPs into an RF signal, and transmits the RF signal to the broadcast receiving device 200 .

Hereinafter, a unit structure of a transmission frame generated by the broadcast transmission apparatus 100 according to the present invention will be described.

4A is a diagram for explaining a process in which an input stream is processed as a generic frame.

As shown in FIG. 4A , an input processing module in which an input stream is processed as a generic frame may operate at the data pipe level. Specifically, the plurality of input streams 411 to 413 are processed as data pipes 421 to 423 for a plurality of generic packets through an input pre-processing process, and a data pipe 421 for a plurality of generic packets (GP). to 423) are encapsulated into data pipes 431 to 433 for a plurality of generic frames GF through an input processing process, and are scheduled as transmission frames.

FIG. 4B is a diagram for explaining the relationship between the generic packet 420 and the generic frame 430 .

As shown in FIG. 4B , the payload of the generic packet 420 is a packet constituting a TS, IP, or other type of stream. Also, the generic frame 430 may include a plurality of complete generic packets or a part thereof.

4C is a diagram for explaining a local frame structure for each PLP.

As shown in FIG. 4C , the generic frame 430 includes a header, a data field, and a padding field.

The generic frame 430 is processed as a GF FEC packet 340 by adding parity through the FEC encoding process.

The GF FEC packet 440 is processed into the FEC block 450 through a bit interleaving and constellation mapping process, a plurality of FEC blocks are processed as a time interleaving block 460 through a cell interleaving process, and the plurality of time interleaving blocks are An interleaving frame 470 is constituted.

4D is a diagram for explaining the structure of an interleaving frame.

As shown in FIG. 4D , the interleaving frame 470 may be transmitted through different transmission frames 461 and 462 , and a plurality of transmission frames and FEF parts may form one super frame 470 . .

Meanwhile, one transmission frame 461 may include a preamble symbol 10 and data symbols 20 for transmitting data.

The preamble symbol 10 includes an L1 pre-signaling region 11 and an L1 post-signaling region 12 . The L1 pre-signaling region 11 provides basic transmission parameters including parameters required for reception and decoding of L1 post-signaling, and may have a fixed length.

The L1 post signaling region 12 includes a configurable field 12-1 and a dynamic field 12-2.

A configurable field 12-1 includes information that can be changed in units of super frames, and a dynamic field 12-2 includes information that can be changed in units of every frame.

In addition, the L1 post-signaling region 12 may optionally include an extension field 12-3. In addition, although not shown in the drawing, the L1 post-signaling region 12 may further include a CRC field and, if necessary, an L1 padding field.

Up to now, each configuration of the broadcast transmission apparatus 100 according to the present invention has been described in detail. Hereinafter, each configuration of the broadcast receiving apparatus 200 according to the present invention will be described in detail.

5 is a block diagram illustrating a schematic configuration of a broadcast reception device according to an embodiment of the present invention, and FIG. 6 is a detailed block diagram illustrating a detailed configuration of a broadcast reception device according to an embodiment of the present invention.

As shown in FIG. 5 , the broadcast reception device 200 includes a receiver 210 , a demodulator 220 , a signal processor 230 , and a processor 240 .

The receiver 210 receives a data stream in the form of an RF signal including a plurality of PLPs from the broadcast transmission device 100 . This data stream may further include signaling information. Here, the signaling information may include at least one of information on an input type of an input stream input to the broadcast transmission device 100 and information on a data type mapped to at least one signal processing path. Here, the information on the input type of the input stream may be information indicating whether all signal processing paths in the received data stream are of the same input type.

The demodulator 220 demodulates a plurality of PLPs included in the data stream received from the receiver 210, and generates at least one generic packet corresponding to each of the plurality of PLPs and additional information on the at least one generic packet. print out

The signal processing unit 230 performs signal processing on each generic packet output from the demodulator 220 based on additional information corresponding to each generic packet.

The processor 240 may output multimedia data for each generic packet signal-processed by the signal processing unit 230 .

Among the components constituting the broadcast reception device 200, the receiver 210, the demodulator 220, and the signal processor 230 may be implemented as one chip, and the processor 240 may be implemented as another chip. there is.

However, the present invention is not limited thereto, and the receiver 210 , the demodulator 220 , the signal processor 230 , and the processor 240 may be implemented as a single chip.

Specifically, as shown in FIG. 6 , the demodulator 220 may include a generic packet generator 221 and an additional information generator 223 . The generic packet generator 221 selects a channel from the data stream in the form of an RF signal received through the receiver 210, restores a timing/frequency error of the signal of the selected channel, and reduces distortion due to multi-path At least one generic packet corresponding to each PLP may be generated from a plurality of PLPs included in the data stream by performing restoration and error correction through the method (not shown).

In addition, the additional information generator 223 may refer to the header of at least one generic packet generated from each of the plurality of PLPs and generate additional information for each generic packet based on information not included in the header. Here, the additional information may be information used to restore a payload or process a signal in a higher layer among information not included in the header information of the generic packet. Accordingly, the additional information generator 220 restores the payload in a higher layer among information not included in the header information of each generic packet or adds information used for signal processing for signal processing of each generic packet. information can be created.

According to the embodiment, the additional information includes sync code information indicating the start of each generic packet, valid information for determining whether the output time of multimedia data for each generic packet is valid, error information, It may include at least one of identification information for each of the plurality of PLPs and ranking information indicating an order of each of the plurality of PLPs.

Such additional information is located at the front end of the header of the generic packet, and may be allocated with a size of 1 byte. That is, sync code information indicating the start of each generic packet included in the additional information, valid information, error information, identification information, and priority information may be allocated with a specific bit size within one byte.

According to an embodiment, each of sync code information indicating the start of each generic packet, valid information, error information, identification information for each of a plurality of PLPs, and priority information indicating an order of each of the plurality of PLPs is 1 bit It can be assigned by size.

According to another embodiment, each of the sync code (Sync Code) information indicating the start of each generic packet, valid information, error information, identification information for each of a plurality of PLPs, and ranking information indicating the order of each of the plurality of PLPs is Different sizes may be allocated within the 1-byte size.

According to another embodiment, when the additional information is allocated in a size of 2 bytes, each piece of information included in the additional information may be allocated in different bit units according to the size allocated to the additional information.

Meanwhile, the additional information may further include time information for outputting multimedia data for each generic packet. In this case, the additional information may be allocated with a specific bit size within 6 bytes.

Here, the time information is information for outputting multimedia data, and the demodulator 220 includes time information of a frame received from the broadcast transmission device 100 and the signal processing unit 230 through the additional information generator 223 . can be generated based on time information required to perform decoding of each generic packet included in the corresponding frame.

Accordingly, the processor 240 determines whether the time information indicating the output time of multimedia data for the generic packet is valid based on the valid information included in the additional information, and when it is determined that the corresponding time information is valid information, the additional information Multimedia data for the generic packet may be output based on the time information included in the .

7 is an exemplary diagram illustrating the structure of a generic packet according to an embodiment of the present invention.

As shown in FIG. 7 , the block 700 of the generic packet may include an I/F Header and an ATSC3.0 Link Layer Protocol (ALP) packet.

The header of the block 700 of the generic packet may include additional information for signal processing for the ALP packet, and such additional information includes flag information having a size of 1 byte and PTP information having a size of 6 bytes. may include

Specifically, the first block 710 including flag information having a size of 1 byte may include information used for reconstructing a payload in a higher layer or for signal processing among information not included in the header of the generic packet. .

In addition, the second block 720 including PTP information having a size of 6 bytes may include time information indicating an output time of multimedia data for a generic packet.

Hereinafter, flag information and PTP information included in the additional information will be described in detail.

8 is a first exemplary diagram illustrating a structure of a flag included in additional information according to an embodiment of the present invention.

As shown in FIG. 8 , flag information included in the additional information for the generic packet may be allocated with a size of 1 byte. Meanwhile, the flag information included in the additional information for the generic packet may include error information and PLP identification information, and the error information and PLP identification information may be allocated with a size of 1 bit, respectively.

In this case, the 1-1 block 711 of the first block 710 including the flag information includes 1-bit error information GPEF, and the 1-2 and 1-3 blocks 713 and 715 . may include identification information (PLPTAG 1, PLPTAG 0) for a 1-bit PLP, respectively.

As described above, the signal processing unit 230 performs signal processing on each generic packet output from the demodulator 220 based on flag information included in additional information corresponding to each generic packet.

According to an embodiment, error information may be included in flag information included in additional information of the first generic packet corresponding to PLP 0. In this case, the signal processing unit 230 may decode the first generic packet at different decoding processing levels according to error information included in flag information of the additional information of the first generic packet. For example, the decoding processing level may be preset to a first level, and when error information is included in the flag information of the additional information of the first generic packet, the signal processing unit 230 generates the first level according to the error information. By performing decoding of the first generic packet at a decoding processing level higher than the decoding processing level preset as the level, an error rate occurring during decoding may be minimized.

As another example, when error information is included in flag information included in additional information of the first generic packet among the first to fourth generic packets corresponding to PLP 0 to PLP 3 respectively, the signal processing unit 230 may Signal processing may be performed based on error information only on the remaining second to fourth generic packets except for the first generic packet.

The signal processing unit 230 may include a decoder 231 and a stream generator 233 .

The decoder 231 decodes necessary data. In this case, the decoder 231 may perform decoding by obtaining parameters such as an FEC method and a modulation method for data stored in each data region of the generic packet by using the signaling information included in the data stream. Also, the decoder 231 may perform decoding based on additional information of the generic packet or calculate the location of necessary data based on data information included in the header of the generic packet.

The stream generator 233 may generate multimedia data to be serviced by processing the generic frame received from the decoder 231 .

For example, the stream generator 233 may generate a generic packet (or a baseband packet) from an error-corrected generic frame based on various pieces of information. Specifically, the stream generator 233 may include de-jitter buffers capable of regenerating the correct timing for reconstructing the output stream based on various information. Accordingly, a delay for synchronization between a plurality of PLPs may be compensated.

9 is a second exemplary diagram illustrating a flag structure included in additional information according to another embodiment of the present invention.

As shown in FIG. 9 , flag information included in the additional information for the generic packet may be allocated in a size of 1 byte. On the other hand, the flag information included in the additional information on the generic packet includes not only the error information and PLP identification information described in FIG. 8, but also sync code information indicating the start of the generic packet and the output time of the multimedia data for the generic packet. It may further include valid information for determining.

In addition, each piece of information included in the flag information may be allocated with a size of 1 bit.

In this case, the 1-1 block 717' of the first block 710' including the flag information includes sync code information (ALPS) indicating the start of the generic packet, and the 1-2 and 1-th blocks. Each of the three blocks 713 ′ may include identification information PLPTAG 1 and PLPTAG 0 for the PLP, respectively. In addition, valid information (PTP EN) for determining whether the output time of multimedia data for the generic packet is valid is included in blocks 1-4 (719') of the first block 710', and steps 1-5 The block 711 ′ may include error information GPEF.

Accordingly, as described above, the signal processing unit 230 converts each generic packet output from the demodulator 220 to different decoding processing levels according to error information included in flag information of additional information corresponding to each generic packet. Each generic packet may be decoded and outputted to the processor 240 .

Accordingly, the processor 240 may output multimedia data for the generic packet output through the signal processing unit 230 . In this case, the processor 240 determines whether the time information included in the PTP information of the additional information is valid based on the valid information included in the flag information of the additional information.

According to an embodiment, when the value of valid information included in flag information is '0', processor 240 determines that time information included in PTP information of additional information is invalid. On the other hand, if the value of the valid information included in the flag information is '1', the processor 240 determines that the time information included in the PTP information of the additional information is valid, and based on the time information included in the PTP information of the additional information Thus, multimedia data for the generic packet can be output.

Hereinafter, the PTP information included in the additional information will be described in detail.

10 is an exemplary diagram illustrating a PTP structure included in additional information according to an embodiment of the present invention.

As shown in FIG. 10 , the PTP information included in the additional information for the generic packet may be allocated with a size of 6 bytes. The PTP information included in the additional information for the generic packet may include time information for outputting multimedia data for the generic packet.

Specifically, as shown, each block 721 to 735 of the second block 720 for PTP information may include time information set for each time unit.

According to an embodiment, among a plurality of blocks included in the second block 720 for PTP information, the 2-1 block 721 may include time information in units of 'sec(s),' and the 2-2 The block 723 may include time information in units of 'msec (ms)', and the second-3 block 725 may include time information in units of 'Micro sec (µs)'.

Accordingly, when it is determined that the valid information included in the flag information is valid, the processor 240 may output multimedia data for the generic packet based on time information included in the PTP information of the additional information.

Meanwhile, as shown in FIG. 6 , the broadcast reception device 200 further includes first and second interface units 250 and 260 for outputting generic packet related data corresponding to each of the plurality of PLPs to the signal processing unit 230 . can do.

11 is a first exemplary diagram for outputting generic packet related data from a broadcast receiving device according to an embodiment of the present invention, and FIG. 12 is a first exemplary view showing generic packet related data from the broadcast receiving device according to another embodiment of the present invention It is a second exemplary diagram.

11, when additional information of a generic packet corresponding to each of the plurality of PLPs is generated by the additional information generating unit 223, the demodulator 220 inserts the additional information into each generic packet, At least one of generic packet-related data into which additional information is inserted, clock information, and valid information is output to the first interface unit 250 .

However, the present invention is not limited thereto, and when additional information of a generic packet corresponding to each of the plurality of PLPs is generated by the additional information generator 223, the demodulator 220 inserts the additional information into each generic packet. In addition, data related to the generic packet into which the additional information is inserted, clock information, and valid information may be output together to the first interface unit 250 .

Also, the demodulator 220 outputs sync information indicating the start of the generic packet in which the additional information is inserted to the second interface unit 260 .

Accordingly, the signal processing unit 230 may determine the start time of the generic packet-related data into which the additional information is inserted and the location of the additional information based on the sync information received through the second interface unit 250, and the determination Based on the result, additional information included in the generic packet-related data received through the first interface unit 250 may be acquired, and signal processing may be performed on the generic packet-related data based on the acquired additional information. .

Meanwhile, as shown in FIG. 12 , the demodulator 220 generates at least one of generic packet-related data, clock information, and valid information corresponding to each of the plurality of PLPs demodulated by the generic packet generator 221 first. output to the interface unit 250 .

However, the present invention is not limited thereto, and the demodulator 220 transmits generic packet related data corresponding to each of the plurality of PLPs demodulated by the generic packet generator 221, clock information, and valid information together with the first interface unit. (250) can be output.

Also, the demodulator 220 outputs at least one of additional information of each generic packet generated by the additional information generator 223 and sync information indicating the start of each generic packet to the second interface unit 260 . .

Accordingly, the signal processing unit 230 may determine the start time of the generic packet related data related to the corresponding additional information based on the sync information and the additional information received through the second interface unit 260, and based on the determination result Based on this, signal processing may be performed on the generic packet-related data received through the first interface unit 260 .

Up to now, each configuration of the broadcast transmitting apparatus 100 and the broadcast receiving apparatus 200 according to the present invention has been described in detail. Hereinafter, a signal processing method in the broadcast transmitting apparatus 100 and the broadcast receiving apparatus 200 according to the present invention will be described in detail.

13 is a flowchart of a signal processing method of a broadcast transmission apparatus according to an embodiment of the present invention.

As shown in FIG. 13 , the broadcast transmission apparatus 100 generates a generic packet including header and payload data corresponding to an input stream ( S4210 ).

Here, the input stream may be a Transport Stream (TS), Internet Packets (IP) (eg, IPv4, IPv6), MPEG Media Transport (MMT), Generic Stream (GS), Generic Stream Encapsulation (GSE), and the like. In addition, the header may include information about payload data included in the corresponding generic packet and information about the packet included in the corresponding generic packet. Meanwhile, a generic packet (GP), a baseband packet (BBP), or an L2 packet may have a different name depending on system implementation.

When such a generic packet is generated, the broadcast transmission apparatus 100 generates a generic frame including the generated generic packet (S1020). Thereafter, the broadcast transmission device 100 performs signal processing on the generic frame (S1030). Thereafter, the broadcast transmission device 100 transmits the signal-processed frame to the broadcast reception device 200 (S1040). Here, the signal-processed frame may be a transmission frame in the form of a data stream including a plurality of PLPs composed of generic frames. Accordingly, the broadcast transmission device 100 may modulate a data stream including a plurality of PLPs into an RF signal, and transmit the data stream modulated with the RF signal to the broadcast reception device 200 .

14 is a flowchart of a signal processing method of a broadcast receiving apparatus according to an embodiment of the present invention.

As shown in FIG. 14 , when a data stream in the form of an RF signal including a plurality of PLPs is received from the broadcast transmission device 100 , the broadcast receiving device 200 generates a plurality of PLPs included in the received data stream as a generic form. It demodulates into packets (S1110, S1120).

When the demodulated generic packet corresponding to each of the plurality of PLPs is demodulated, the broadcast reception device 200 generates and outputs at least one generic packet corresponding to each of the plurality of PLPs and additional information on the at least one generic packet ( S1130).

Here, the additional information may be information used for reconstructing a payload in a higher layer or for signal processing among information not included in the header information of the generic packet. According to an embodiment, the additional information includes sync code information indicating the start of each generic packet, valid information for determining whether an output time of multimedia data for each generic packet is valid, error information, and a plurality of It may include at least one of identification information for each PLP and rank information indicating an order of each of the plurality of PLPs.

Such additional information is located at the front end of the header of the generic packet, and may be allocated with a size of 1 byte. In addition, sync code information indicating the start of each generic packet, valid information, error information, identification information for each of a plurality of PLPs, and priority information indicating an order of each of the plurality of PLPs are allocated with a specific bit size. can be

According to an embodiment, each of sync code (Sync Code) information indicating the start of each generic packet, valid information, error information, identification information for each of a plurality of PLPs, and priority information indicating an order of each of the plurality of PLPs is 1 It can be allocated in bit size.

According to another embodiment, each of the sync code (Sync Code) information indicating the start of each generic packet, valid information, error information, identification information for each of a plurality of PLPs, and ranking information indicating the order of each of the plurality of PLPs is Bits of different sizes may be allocated within one byte size.

According to another embodiment, when the additional information is allocated in a size of 2 bytes, each piece of information included in the additional information may be allocated in different bit units according to the size allocated to the additional information.

When each generic packet and additional information generated in relation to each generic packet are output, the broadcast reception device 200 performs signal processing on the generic packet based on the outputted additional information (S1140).

According to an embodiment, error information may be included in additional information of the first generic packet corresponding to PLP 0. In this case, the broadcast reception device 200 may decode the first generic packet at different decoding processing levels according to error information included in the additional information of the first generic packet. For example, the decoding processing level may be preset to the first level, and when error information is included in the additional information of the first generic packet, the signal processing unit 230 may include error information in the additional information of the first generic packet. Accordingly, by performing decoding of the first generic packet at a decoding processing level higher than the decoding processing level preset as the first level, an error rate occurring during decoding may be minimized.

Meanwhile, the broadcast reception device 200 may generate and output a generic packet corresponding to each of a plurality of PLPs and additional information for each generic packet based on the following embodiment.

According to an embodiment, when the additional information of the generic packet corresponding to each of the plurality of PLPs is generated, the broadcast reception device 200 inserts the additional information into each generic packet, and data related to the generic packet into which the additional information is inserted; At least one of clock information and valid information is output through the first interface unit. However, the present invention is not limited thereto, and when additional information of a generic packet corresponding to each of the plurality of PLPs is generated, the broadcast reception device 200 inserts the additional information into each generic packet and inserts the additional information into the generic packet. Packet related data, clock information, and valid information may be output together through the first interface unit.

Then, the broadcast reception device 200 outputs sync information indicating the start of the generic packet in which the additional information is inserted through the second interface unit.

Accordingly, the broadcast reception device 200 may determine the start time of the generic packet-related data in which the additional information is inserted and the location of the additional information based on the sync information output through the second interface unit, and based on the determination result Accordingly, additional information included in the generic packet-related data output through the first interface unit may be acquired, and signal processing may be performed on the generic packet-related data based on the acquired additional information.

According to another embodiment, the broadcast reception device 200 outputs at least one of generic packet related data, clock information, and valid information corresponding to each of the plurality of PLPs through the first interface unit. However, the present invention is not limited thereto, and the broadcast reception device 200 may output generic packet related data corresponding to each of the plurality of PLPs, clock information, and valid information together through the first interface unit.

Also, the broadcast reception device 200 outputs at least one of additional information of each generic packet and sync information indicating the start of each generic packet through the second interface unit.

Accordingly, the broadcast reception device 200 may determine the start time of the generic packet-related data related to the corresponding additional information based on the sync information and the additional information output through the second interface unit, and based on the determination result, the second 1 Signal processing may be performed on the data related to the generic packet output through the interface unit.

Meanwhile, according to an additional aspect of the present invention, the additional information may further include time information for output of multimedia data for the generic packet, and such time information may be allocated with a specific bit size within 6 bytes. .

Here, the time information is information for outputting multimedia data, and the broadcast receiving device 200 takes time information of a frame received from the broadcast transmitting device 100 and decoding each generic packet included in the frame. It may be generated based on time information.

Accordingly, the broadcast reception device 200 determines whether the time information indicating the output time of multimedia data for the generic packet is valid based on the valid information included in the additional information, and when it is determined that the time information is valid information, Multimedia data for the generic packet may be output based on the time information included in the additional information.

Meanwhile, a non-transitory computer readable medium in which a program for sequentially performing the signal processing method according to the present invention is stored may be provided.

The non-transitory readable medium refers to a medium that stores data semi-permanently, rather than a medium that stores data for a short moment, such as a register, cache, memory, and the like, and can be read by a device. Specifically, the various applications or programs described above may be provided by being stored in a non-transitory readable medium such as a CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, and the like.

In addition, although a bus is not shown in the above-described block diagram of the transmitting apparatus and the receiving apparatus, communication between the respective components in the transmitting apparatus and the receiving apparatus may be achieved through a bus. In addition, each device may further include a processor such as a CPU or a microprocessor that performs the various steps described above.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

100: broadcast transmission device 110: generic packet generator
120: frame generation unit 120-1: generic header generation unit
120-2: Generic frame generator 125: Generic frame scrambler
200: broadcast receiving device 210: receiving unit
220: demodulator 221: generic packet generator
223: additional information generating unit 230: signal processing unit
231: decoder 233: stream generator
240: processor 250: first interface unit
260: second interface unit

Claims (16)

In the broadcast receiving device,
a receiving unit for receiving a data stream composed of a plurality of PLPs (Physical Layer Pipes);
Demodulates the plurality of PLPs included in the data stream received from the receiver, generates and outputs at least one generic packet corresponding to each of the plurality of PLPs and additional information on the at least one generic packet a demodulator that does; and
a signal processing unit configured to perform signal processing on the at least one generic packet based on the outputted additional information;
When the additional information includes error information, the signal processing unit decodes at least one generic packet including the error information to a first decoding processing level, and second decodes the remaining generic packets that do not include the error information. Decode to processing level,
The first decoding processing level is characterized in that different from the second decoding processing level, the broadcast reception device. The method of claim 1,
The additional information is
The broadcast reception device according to claim 1, wherein the information is information used for reconstructing a payload or processing a signal in an upper layer among information not included in the header information of the generic packet. The method of claim 1,
The additional information is
Sync code information indicating the start of the generic packet, valid information for determining whether the output time of multimedia data for the generic packet is valid, error information, identification information for each of the plurality of PLPs, and each of the plurality of PLPs A broadcast reception device comprising at least one of ranking information indicating an order. 4. The method of claim 3,
Each of the sync code information, the valid information, the error information, the identification information, and the ranking information,
A broadcast reception device, characterized in that it is allocated to a specific bit size within one byte. 4. The method of claim 3,
The additional information is
Further comprising time information for the output of multimedia data for the generic packet,
The time information is
A broadcast reception device, characterized in that it is allocated to a specific bit size within 6 bytes. The method of claim 1,
It further includes; first and second interface units;
The demodulator is
inserting additional information of the generic packet into the generic packet, and outputting at least one of a generic packet into which the additional information is inserted, clock information, and valid information to the signal processing unit through the first interface unit;
and outputting sync information indicating the start of the generic packet in which the additional information is inserted to the signal processing unit through the second interface unit. The method of claim 1,
It further includes; first and second interface units;
The demodulator is
outputting at least one of the generic packet, clock information, and valid information to the signal processing unit through the first interface unit;
and outputting at least one of sync information indicating the start of the generic packet and additional information on the generic packet to the signal processing unit through the second interface unit. delete A method for processing a signal in a broadcast receiving device, the method comprising:
receiving a data stream composed of a plurality of PLPs;
demodulating the plurality of PLPs included in the received data stream, generating and outputting at least one generic packet corresponding to each of the plurality of PLPs and additional information on the at least one generic packet; and
performing signal processing on the at least one generic packet based on the additional information;
including,
The step of performing the signal processing comprises:
When the additional information includes error information, at least one generic packet including the error information is decoded to a first decoding processing level, and the remaining generic packets not including the error information are decoded to a second decoding processing level, ,
and the first decoding processing level is different from the second decoding processing level. 10. The method of claim 9,
The additional information is
The signal processing method according to claim 1, wherein the information is information used to restore a payload in an upper layer or to process a signal among information not included in the header information of the generic packet. 10. The method of claim 9,
The additional information is
Sync code information indicating the start of the generic packet, valid information for determining whether the output time of multimedia data for the generic packet is valid, error information, identification information for each of the plurality of PLPs, and each of the plurality of PLPs A signal processing method comprising at least one of ranking information indicating an order. 12. The method of claim 11,
Each of the sync code information, the valid information, the error information, the identification information, and the ranking information,
A signal processing method, characterized in that it is allocated to a specific bit size within one byte. 12. The method of claim 11,
The additional information is
Further comprising time information for the output of multimedia data for the generic packet,
The time information is
A signal processing method, characterized in that it is allocated to a specific bit size within 6 bytes. 10. The method of claim 9,
The output step is
inserting additional information of the generic packet into the generic packet, and outputting at least one of a generic packet into which the additional information is inserted, clock information, and valid information through a first interface unit;
and outputting sync information indicating the start of the generic packet in which the additional information is inserted through the second interface unit. 10. The method of claim 9,
The output step is
outputting at least one of the generic packet, clock information, and valid information through the first interface unit;
and outputting at least one of sync information indicating the start of the generic packet and additional information on the generic packet through a second interface unit.
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