KR20170017688A - Broadcast receiving apparatus and signal processing method thereof - Google Patents

Abstract

Disclosed are a broadcast receiving apparatus and a signal processing method for the same. The broadcast receiving apparatus according to the present invention includes a receiving unit receiving a data stream made up of a plurality of physical layer pipes (PLPs), a demodulation unit demodulating the plurality of PLPs included in the data stream received by the receiving unit and generating and outputting at least one generic packet corresponding to each of the PLPs and additional information with respect to the one or more generic packets, and a signal processing unit performing signal processing with respect to the one or more generic packets based on the output additional information. The broadcast receiving apparatus according to the present invention is capable of providing broadcasting services in compliance with broadcasting standards for providing various broadcasting services.

Description

[0001] Broadcast receiving apparatus and signal processing method [0002]

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

In the information society of the 21st century, broadcasting and communication services are in the era of full-scale digitalization, multi-channelization, broadband and high-quality. In particular, with the spread of high-definition digital TVs, PMPs, and mobile broadcasting devices, demand for supporting various receiving methods of digital broadcasting services is increasing.

In response to these demands, the standard group has established various standards and endeavors to provide various services that satisfy the needs of users. Therefore, there is a need to search for the development of a broadcast receiving apparatus conforming to the standard for providing various services.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and it is an object of the present invention to provide a broadcast receiving apparatus and a signal processing method thereof that conform to a broadcasting standard for providing various broadcast services.

According to an embodiment of the present invention, a broadcast receiving apparatus includes a receiver for receiving a data stream composed of a plurality of PLPs, a plurality of PLPs included in a data stream received from the receiver, A demodulator for generating and outputting at least one generic packet corresponding to each of the plurality of PLPs and the additional information for the at least one generic packet, And a signal processing unit for performing signal processing on one generic packet.

The additional information may be information used for restoring a payload from an upper layer among information not included in the header information of the generic packet, or for use in signal processing.

The additional information may include at least one of sync code information indicating a start of the generic packet, valid information for determining whether the output time of the multimedia data for the generic packet is valid, error information, identification information for each of the plurality of PLPs And ranking information indicating the order of each of the plurality of PLPs.

Each of the sync code information, the valid information, the error information, the identification information, and the rank information may be assigned a specific bit size within one byte.

The additional information may further include time information for outputting the multimedia data to the generic packet, and the time information may be allocated to a specific bit size within 6 bytes.

The demodulating unit may further include first and second interface units for outputting the generic packet related data to the signal processing unit, wherein the demodulating unit inserts the additional information of the generic packet into the generic packet, Outputting at least one of packet related data, clock information, and valid information to the first interface unit, and outputting sync information indicating the start of the generic packet in which the additional information is inserted to the second interface unit.

The demodulator may further include first and second interface units for outputting the generic packet related data to the signal processor, wherein the demodulator is configured to transmit at least one of the generic packet related data, the clock information, And outputs at least one of the sync information indicating the start of the generic packet and the additional information for the generic packet to the second interface unit.

If the error information is included in the additional information output from at least one of the first interface unit and the second interface unit, the signal processing unit may generate the generic packet for the additional information at a different decoding processing level Decoding can be performed.

According to another aspect of the present invention, there is provided a signal processing method for a broadcast receiving apparatus, comprising: receiving a data stream composed of a plurality of PLPs; demodulating the plurality of PLPs included in a data stream received from the receiving unit; Generating and outputting at least one generic packet corresponding to each of a plurality of PLPs and additional information for the at least one generic packet, and performing signal processing for the at least one generic packet based on the additional information .

The additional information may be information used for restoring a payload from an upper layer among information not included in the header information of the generic packet, or for use in signal processing.

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

Each of the sync code information, the valid information, the error information, the identification information, and the rank information may be assigned a specific bit size within one byte.

The additional information may further include time information for outputting the multimedia data to the generic packet, and the time information may be allocated to a specific bit size within 6 bytes.

The output step may include inserting the additional information of the generic packet into the generic packet, and transmitting at least one of generic packet related data, clock information, and valid information into which the additional information is inserted to the first interface unit And outputs the sync information indicating the start of the generic packet in which the additional information is inserted through the second interface unit.

The outputting step may include outputting at least one of the generic packet related data, the clock information, and the valid information through the first interface unit, wherein the sink information indicating the start of the generic packet, And output at least one of the additional information through the second interface unit.

In addition, the step of performing the signal processing may further include, when error information is included in the additional information output from at least one of the first and second interface units, generating a generic It is possible to perform decoding of the packet.

As described above, according to various embodiments of the present invention, a broadcast receiving apparatus can provide a broadcast service conforming to a broadcast standard for providing various broadcast services.

1 is a block diagram showing a configuration of a broadcast transmission apparatus according to an embodiment of the present invention;
2 is a detailed block diagram of a frame generation unit of a broadcast transmission apparatus according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating 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 a 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 illustrating a detailed configuration of a broadcast receiving apparatus according to an embodiment of the present invention.
7 is a diagram illustrating a 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 side information according to an embodiment of the present invention.
11 is a first example of outputting generic packet related data in a broadcast receiving apparatus according to an embodiment of the present invention,
12 is a second example of outputting generic packet related data in a broadcast receiving apparatus according to another embodiment of the present invention,
13 is a flowchart illustrating a signal processing method of a broadcast transmission apparatus according to an embodiment of the present invention;
14 is a flowchart illustrating 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 method of describing the present specification and drawings will be described.

First, the terms used in the specification and claims have chosen generic terms in light of their function in various embodiments of the present invention. However, these terms may vary depending on the intentions of the skilled artisan, the legal or technical interpretation, and the emergence of new technologies. In addition, some terms are arbitrarily selected by the applicant. These terms may be construed in the meaning defined herein and may be interpreted based on the general contents of this specification and the ordinary technical knowledge in the art without specific terms definition.

In addition, the same reference numerals or signs in the drawings attached to the present specification indicate components or components that perform substantially the same function. For ease of explanation and understanding, different embodiments will be described using the same reference numerals or symbols. That is, even though all of the elements having the same reference numerals are shown in the plural drawings, the plural drawings do not mean one embodiment.

Further, in the present specification and claims, terms including ordinal numbers such as "first "," second ", etc. may be used for distinguishing between elements. These ordinals are used to distinguish between identical or similar elements, and the use of such ordinal numbers should not be construed as limiting the meaning of the term. For example, components associated with such an ordinal number should not be limited in the order of use, placement order, or the like. If necessary, each ordinal number may be used interchangeably.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In this application, the terms "comprise", "comprising" and the like are used to specify that there is a stated feature, number, step, operation, element, component, or combination thereof, But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

In the embodiments of the present invention, terms such as "module", "unit", "part", and the like are terms used to refer to components that perform at least one function or operation, Or may be implemented as a combination of hardware and software. It should also be understood that a plurality of "modules "," units ", "parts ", etc. may be integrated into at least one module or chip, (Not shown).

Further, in an embodiment of the present invention, when a part is connected to another part, this includes not only a direct connection but also an indirect connection through another medium. Also, the inclusion of a component in a component means that the component may include other components, not the exclusion of any other component, unless specifically stated otherwise.

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

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

1, the broadcast transmission apparatus 100 includes a generic packet generation unit 110, a frame generation unit 120, a signal processing unit 130, and a transmission unit 140.

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

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

In general, the payload data included in the generic packet may include one of an IP (Internet Protocol) 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 kinds of data. Here, a generic packet can be regarded as a unit packet for mapping various types of input data to a physical layer.

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

If the current packet is a single packet mode that transmits one Service Data Unit (SUD), the Generic Packet header includes a field indicating whether any feature or option header is used and a field indicating whether the current Generic Packet And may further include a field indicating a LSB (Least Significant Bit) length. Here, the field indicating whether an arbitrary feature or option header is used includes a field indicating whether the LABEL field exists in the option header, a field indicating whether an extension header exists after the option header, A field indicating a length of the extended header length, and a field indicating additional information for header compression in the optional header of the current generic packet.

In the case of 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 payload in the current generic packet, And a field indicating whether the header of the option header or the header extension is used.

The option header includes at least one of a field for providing a sub-stream address, a field for providing a length of an extension header following the option header, and a field for containing additional information for restoring the compressed service data unit transmitted in the current generic packet One can be included.

On the other hand, if the current packet is 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, And may further include a field indicating whether to transmit a complete service data unit.

In the segmentation mode, the generic packet header includes a field indicating a length of a payload in a current generic packet, a field providing a segment identifier of an input packet transmitted in a current generic packet, a field indicating a current generic packet as a last segment A field indicating whether the header extension is used, and a field indicating whether a feature of the optional header or a header extension is used.

In the segmentation mode, the generic packet header includes a field indicating a length of a payload in a current generic packet, a field providing a segment identifier of an input packet transmitted in a current generic packet, a field indicating a current generic packet as a last segment A field indicating whether to transmit or not, and a field indicating whether any feature or option header is used.

In addition, in the segmentation mode, the generic packet header includes a field for providing an identifier of a segmented input packet, a field for indicating the length of a payload in the current generic packet, a field for providing a segment identifier of an input packet transmitted in the current generic packet And a field indicating whether or not the current generic packet transmits the last segment of the input packet.

On the other hand, if the current packet is 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 the service data unit, Unit may be further included in the field.

Also, in the 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 generic packet, a field indicating the option portion of the option header, And a field indicating a length of an input packet connected to the input packet.

The frame generation unit 120 may generate a frame including a generic packet. Here, the frame to be generated may be a generic frame including a generic packet or a baseband frame (BBF) or an L1 packet. In the present invention, a generic frame is designated and set.

Specifically, the frame generator 120 arranges 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 a 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 a 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. The frame generation unit 120 may transmit the generated baseband frame to the baseband frame scrambler 125. [

The generic packet generation unit 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 the L2 packet in the ISO 7 hierarchical model. That is, the generic packet generation unit 110 may generate a generic packet by encapsulating a packet (IP packet, TS packet, etc.) input from an input layer higher than Layer 2.

The generic header generation unit 120-1 may generate a header to be inserted into the generic frame. Here, the header inserted in the generic frame includes information on the generic frame.

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

The generic frame generation unit 120-2 encapsulates the header generated from the generic header generation unit 120-1 into the generic packet output from the generic packet generation unit 110 to generate a generic frame can do.

The generic frame scrambler 125 may generate the scrambled generic frame by mixing the data stored in the generic frame in a random order before the forward error correction code is added to each generic frame. The scrambled genre frame is transmitted to the broadcast receiving apparatus 200 through the PLP and signal processing is performed. 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 processed independently. That is, each service (e.g., video, extended video, audio, data stream, etc.) can be transmitted and received through a plurality of RF channels, wherein PLP is a stream transmitted through such a path . In addition, the PLP may be located in slots that are distributed with a time interval on multiple RF channels, or may be distributed with a time interval on one RF channel. That is, one PLP can be distributed over one RF channel or multiple RF channels with a time interval.

The PLP structure is composed of an input mode A providing one PLP and an input mode B providing a plurality of PLPs. In particular, when the input mode B is supported, not only a specific service can be provided robustly, The time interleaving length can be increased to obtain a time diversity gain. In addition, when only a specific stream is received, the power of the receiver can be turned off during the remaining time, so that it can be used with low power, which is suitable for providing portable and mobile broadcast service.

In order to reduce the deterioration of transmission quality in the mobile communication transmission path, time diversity is performed so that when the same signal is transmitted several times at a predetermined time interval at the transmitting side, the receiving side synthesizes the received signals again to obtain a good transmission quality Technology.

In addition, PLP 0 plays a role in increasing transmission efficiency by including information that can be commonly transmitted to a plurality of PLPs in one PLP. Such PLPs are referred to as common PLPs, and PLPs The PLPs (PLP 1 to PLP 3) other than 0 can be used for data transmission, and such PLPs are referred to as data PLPs. By using such a PLP, SDTV programs can be provided not only for receiving a home HDTV program, but also for carrying and traveling. In addition, it is possible not only to provide a variety of broadcasting services to viewers through a broadcasting station or a broadcasting contents provider, but also to provide a differentiated service capable of receiving broadcasts even in a poor reception area where viewing is difficult.

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

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

Meanwhile, the generic frame scrambler 125 can generate a plurality of scrambled generic frames 125-1 by randomly scrambling the generated generic frames 121 and 122, respectively. Then, the generated scrambled generic frame is transmitted to the PLP as described above, and signal processing for adding the forward error coding code can be performed.

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

The transmission unit 140 transmits the transmission frame signal-processed by the signal processing unit 130 to the broadcast receiving apparatus 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 type including a plurality of PLPs into an RF signal, and transmits the RF signal to the broadcast receiving apparatus 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, the input processing module in which the input stream is processed as a generic frame may operate at the data pipe level. Specifically, a plurality of input streams 411 to 413 are processed by data pipes 421 to 423 for a plurality of generic packets through an input pre-processing process, and data pipes 421 to 423 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.

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

4B, the payload of the generic packet 420 is a packet that constitutes a TS, an IP, or another type of stream. In addition, the generic frame 430 may include a plurality of complete generic packets or portions 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 with the GF FEC packet 340 by adding parity through the FEC encoding process.

The GF FEC packet 440 is processed by a FEC block 450 through a bit interleaving and a constellation mapping process, a plurality of FEC blocks are processed through a cell interleaving process into a time interleaving block 460, Thereby constructing an interleaving frame 470.

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

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 be composed of 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 receiving and decoding 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 on a superframe basis, and a dynamic field 12-2 includes information that can be changed every frame.

In addition, the L1 post signaling region 12 may optionally include an extension field 12-3. Also, although not shown in the figure, 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.

FIG. 5 is a block diagram showing a schematic configuration of a broadcast receiving apparatus according to an embodiment of the present invention, and FIG. 6 is a detailed block diagram showing a detailed configuration of a broadcast receiving apparatus according to an embodiment of the present invention.

5, the broadcast receiving apparatus 200 includes a receiving unit 210, a demodulating unit 220, a signal processing unit 230, and a processor 240.

The receiving unit 210 receives a data stream in the form of an RF signal including a plurality of PLPs from the broadcast transmitting apparatus 100. Such a 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 apparatus 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 for indicating whether all the signal processing paths in the received data stream are the same input type.

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

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

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

The receiving unit 210, the demodulating unit 220, and the signal processing unit 230 of the broadcasting receiving apparatus 200 may be implemented as a single chip and the processor 240 may be implemented as another chip have.

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

6, the demodulation unit 220 may include a generic packet generation unit 221 and an additional information generation unit 223. [ The generic packet generator 221 selects a channel from a data stream of the RF signal type received through the receiver 210, restores a timing / frequency error of a signal of the selected channel, and outputs a distortion due to multipath to an equalizer (Not shown) to generate at least one generic packet corresponding to each PLP from a plurality of PLPs included in the data stream.

The additional information generation unit 223 can generate additional information for each of the generic packets based on information not included in the header by referring to the header of at least one generic packet generated from each of the plurality of PLPs. Here, the additional information may be information used for restoring the payload or signal processing in the upper layer among information not included in the header information of the generic packet. Therefore, the additional information generation unit 220 may restore the payload from the upper layer among the information not included in the header information of each generational packet, or may transmit the information used for the signal processing to the additional Information can be generated.

Such additional information may include sync code information indicating the start of each generic packet, valid information for determining whether the output time of the multimedia data for each generic packet is valid, error information, Identification information on each of the plurality of PLPs, and ranking information indicating the order of each of the plurality of PLPs.

Such additional information is placed in front of the header of the generic packet and can be allocated in a size of 1 byte. That is, Sync Code information, valid information, error information, identification information, and rank information indicating the start of each generic packet included in the additional information can be allocated to a specific bit size within one byte.

According to the embodiment, Sync Code information, valid information, error information, identification information for each of a plurality of PLPs, and ranking information indicating the order of each of a plurality of PLPs indicating the start of each generic packet are each 1 bit Size < / RTI >

According to another embodiment, each of Sync Code information, valid information, error information, identification information for each of a plurality of PLPs, and ranking information indicating the order of each of a plurality of PLPs indicating the start of each generic packet And can be assigned different sizes within one byte size.

According to another embodiment, when the additional information is allocated in the 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.

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

Here, the time information is information for outputting the multimedia data. The demodulation unit 220 demultiplexes the time information of the frame received from the broadcast transmission apparatus 100 described above and the time information of the signal processing unit 230 through the additional information generation unit 223, Based on the 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 the multimedia data for the generic packet is valid based on the valid information included in the additional information. If it is determined that the time information is valid information, The multimedia data for the generic packet may be output based on the time information included in the multimedia data.

7 is an exemplary diagram illustrating a 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 be composed of a header (I / F Header) and an ALP (ATSC 3.0 Link Layer Protocol) packet.

The header of the block 700 of the generic packet may include additional information for signal processing of the ALP packet. Such additional information may include flag information having a size of 1 byte and PTP information having a size of 6 bytes . ≪ / RTI >

Specifically, the first block 710 including the flag information having the size of one byte may include information used for restoring the payload from the upper layer or information used for signal processing among information not included in the header of the generic packet .

The second block 720 including the PTP information having the size of 6 bytes may include time information indicating the output time of the multimedia data for the generic packet.

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

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

As shown in FIG. 8, the flag information included in the additional information for the generic packet can be allocated to a size of 1 byte. On the other hand, 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-th 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, (PLPTAG 1, PLPTAG 0) for the 1-bit PLP, respectively.

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

According to the embodiment, the flag information included in the additional information of the first generic packet corresponding to PLP 0 may include error information. In this case, the signal processing unit 230 may perform decoding of the first generic packet at a different decoding processing level according to the error information included in the flag information of the additional information of the first generic packet. For example, when the error information is included in the flag information of the additional information of the first generic packet, the signal processing unit 230 may set the decoding processing level to the first level, The decoding of the first generic packet can be performed at a decoding processing level higher than the predetermined decoding processing level to minimize the error rate that occurs in decoding.

For example, if the flag information included in the first generic packet of the first to fourth generic packets corresponding to PLP 0 to PLP 3 includes error information, the signal processing unit 230 The signal processing can be performed based on the error information only for the second to fourth generic packets excluding the first generic packet.

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

The decoder 231 decodes the necessary data. In this case, the decoder 231 can obtain parameters such as the FEC scheme and the modulation scheme for data stored in each data area of the generic packet using the signaling information included in the data stream, and perform decoding. The decoder 231 can perform decoding based on the additional information of the generic packet or calculate the position of necessary data based on the data information included in the header of the generic packet.

The stream generator 233 may process the generic frame received from the decoder 231 to generate multimedia data to be served.

In one example, stream generator 233 may generate a generic packet (or baseband packet) from an error corrected generic frame based on various information. Specifically, stream generator 233 may include de-jitter buffers, which may regenerate the correct timing for recovering the output stream based on various information. Thus, a delay for synchronization between a plurality of PLPs can 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, the flag information included in the additional information for the generic packet can be allocated in a size of 1 byte. On the other hand, the flag information included in the additional information for the generic packet includes not only the error information and PLP identification information described in Fig. 8, but also the sync code information indicating the start of the generic packet and whether or not the output time of the multimedia data for the generic packet is valid And may further include valid information for judgment.

Each piece of information included in the flag information can be allocated to a size of 1 bit each.

In this case, the first block 710 'of the first block 710' including flag information includes sync code information ALPS indicating the start of the generic packet, and the 1-2 and 1- 3 blocks 713 'may include identification information (PLPTAG 1, PLPTAG 0) for the PLP, respectively. In the first block 710 ', the first information block 719' includes valid information PTP EN for determining whether the output time of the multimedia data for the generic packet is valid, Error information (GPEF) may be included in block 711 '.

Accordingly, the signal processing unit 230 may convert each generic packet output from the demodulation unit 220 into a different decoding processing level according to the error information included in the flag information of the additional information corresponding to each generic packet, as described above And may perform decoding for each generic packet and output it to the processor 240. [

Accordingly, the processor 240 may output the multimedia data for the generic packet output through the signal processing unit 230. [ At this time, 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 the embodiment, if the value of the valid information included in the flag information is '0', the processor 240 determines that the time information included in the PTP information of the 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 side information is valid, and based on the time information included in the PTP information of the side information Thereby outputting the multimedia data for the generic packet.

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 side 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 in a size of 6 bytes. The PTP information included in the additional information for the generic packet may include time information for outputting the multimedia data to the generic packet.

Specifically, as shown in the figure, each block 721 to 735 of the second block 720 with respect to the PTP information may include time information set by time unit.

According to the embodiment, time information in units of 'sec (s)' may be included in the 2-1 block 721 of the plurality of blocks included in the second block 720 with respect to the PTP information, The block 723 may include time information in units of msec (ms), and the 2-3 block 725 may include time information in units of Micro sec (占 퐏).

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

6, the broadcast receiving apparatus 200 further includes first and second interface units 250 and 260 for outputting the generic packet related data corresponding to the plurality of PLPs to the signal processing unit 230 can do.

FIG. 11 is a first example of outputting generic packet related data in a broadcast receiving apparatus according to an exemplary embodiment of the present invention. FIG. 12 is a flowchart illustrating a method of outputting generic packet related data in a broadcast receiving apparatus according to another exemplary embodiment of the present invention. Fig.

11, the demodulation unit 220 inserts the additional information into each generic packet when the additional information of the generic packet corresponding to each PLP is generated by the additional information generation unit 223, And outputs at least one of the generic packet related data, clock information, and valid information into which the additional information is inserted, to the first interface unit 250.

However, the present invention is not limited to this. When the additional information of the generic packet corresponding to each of a plurality of PLPs is generated by the additional information generation unit 223, the demodulation unit 220 inserts additional information into each generic packet And output generic packet related data, clock information, and valid information into which the additional information is inserted, to the first interface unit 250.

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

Accordingly, the signal processing unit 230 can determine the start point of the generic packet-related data and the position of the additional information inserted with the additional information based on the sync information received through the second interface unit 250, The additional information included in the generic packet related data received through the first interface unit 250 may be acquired based on the result, and the signal processing for the generic packet related data may be performed based on the acquired additional information .

12, the demodulation unit 220 may demodulate at least one of the generic packet related data, the clock information, and the valid information corresponding to each of the plurality of PLPs demodulated by the generic packet generation unit 221, And outputs it to the interface unit 250.

However, the present invention is not limited to this, and the demodulator 220 may combine the generic packet related data, the clock information, and the valid information corresponding to each of a plurality of PLPs demodulated by the generic packet generator 221, (250).

The demodulation unit 220 outputs at least one of the additional information of each generic packet generated by the additional information generation unit 223 and the sync information indicating the start of each generic packet to the second interface unit 260 .

Accordingly, the signal processing unit 230 can determine the starting point of the generic packet related data related to the additional information based on the sync information and the additional information received through the second interface unit 260, It is possible to perform signal processing on the generic packet related data received through the first interface unit 260. [

The configurations of the broadcast transmission apparatus 100 and the broadcast reception apparatus 200 according to the present invention have been described in detail above. 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 illustrating a signal processing method of a broadcast transmission apparatus according to an embodiment of the present invention.

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

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

When such a generic packet is generated, the broadcasting transmitter 100 generates a generic frame including the generated generic packet (S1020). Thereafter, the broadcast transmission apparatus 100 performs signal processing for the generic frame (S1030). Thereafter, the broadcast transmitting apparatus 100 transmits the signal-processed frame to the broadcast receiving apparatus 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 transmitting apparatus 100 may modulate a data stream including a plurality of PLPs into an RF signal, and may transmit the data stream modulated with the RF signal to the broadcast receiving apparatus 200.

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

14, when a data stream of an RF signal type including a plurality of PLPs is received from the broadcast transmission apparatus 100, the broadcast receiving apparatus 200 transmits a plurality of PLPs included in the received data stream to the generic And demodulates the packet (S1110, S1120).

When the demodulated generic packet is demodulated corresponding to each of the plurality of PLPs, the broadcast receiving apparatus 200 generates and outputs at least one generic packet corresponding to each PLP and additional information for at least one generic packet S1130).

Here, the additional information may be information used for restoring the payload from the upper layer or information for signal processing among information not included in the header information of the generic packet. According to the embodiment, the additional information includes sync code information indicating the start of each generic packet, validity information for determining whether the output time of the multimedia data for each generic packet is valid, error information, Identification information for each of the PLPs, and ranking information indicating the order of each of the plurality of PLPs.

Such additional information is placed in front of the header of the generic packet and can be allocated in a size of 1 byte. Each piece of sync code (Sync Code) information indicating the start of each generic packet, validity information, error information, identification information for each of a plurality of PLPs, and rank information indicating the order of each of a plurality of PLPs .

According to one embodiment, Sync Code information, valid information, error information, identification information for each of a plurality of PLPs, and ranking information indicating the order of a plurality of PLPs indicating the start of each generic packet are 1 Bit size.

According to another embodiment, each of Sync Code information, valid information, error information, identification information for each of a plurality of PLPs, and ranking information indicating the order of each of a plurality of PLPs indicating the start of each generic packet Can be allocated to bits of different sizes within one byte size.

According to another embodiment, when the additional information is allocated in the 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 the generic packets and the additional information generated in association with the respective generic packets are output, the broadcast receiving apparatus 200 performs signal processing for the generic packet based on the output additional information (S1140).

According to an embodiment, error information may be included in the additional information of the first generic packet corresponding to PLP 0. In this case, the broadcast receiving apparatus 200 may perform decoding of the first generic packet at a different decoding processing level according to the error information included in the additional information of the first generic packet. For example, if the error information is included in the additional information of the first generic packet, the signal processing unit 230 adds the error information to the additional information of the first generic packet, The decoding of the first generic packet at a decoding processing level higher than the decoding processing level set to the first level may be performed to minimize the error rate that occurs in decoding.

On the other hand, the broadcast receiving apparatus 200 can generate and output the generic packet corresponding to each of the plurality of PLPs and the additional information for each generic packet based on the following embodiments.

According to one embodiment, when the additional information of a generic packet corresponding to each of a plurality of PLPs is generated, the broadcast receiving apparatus 200 inserts the additional information into each generic packet, adds the generic packet related data, Clock information, and valid information through the first interface unit. However, the present invention is not limited to this. When the broadcast receiving apparatus 200 generates additional information of a generic packet corresponding to each of a plurality of PLPs, it inserts additional information in each generic packet, Packet-related data, clock information, and valid information through the first interface unit.

Then, the broadcast receiving apparatus 200 outputs the sink information indicating the start of the generic packet into which the additional information is inserted through the second interface unit.

Accordingly, the broadcast receiving apparatus 200 can determine the start point 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, The additional information included in the generic packet related data output through the first interface unit may be acquired and the signal processing for the generic packet related data may be performed based on the acquired additional information.

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

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

Accordingly, the broadcast receiving apparatus 200 can determine the start point of the generic packet related data related to the additional information based on the sync information and the additional information output through the second interface unit. Based on the determination result, 1 interface unit of the mobile communication terminal.

On the other hand, according to a further aspect of the present invention, the additional information may further include time information for outputting far-media data to the generic packet, and such time information may be allocated to a specific bit size within 6 bytes .

Here, the time information is information for outputting multimedia data. The broadcast receiving apparatus 200 decodes the time information of the frame received from the broadcast transmitting apparatus 100 and the respective generic packets included in the corresponding frame Lt; / RTI >

Accordingly, the broadcast receiving apparatus 200 determines whether or not the time information indicating the output time of the multimedia data with respect to the generic packet is valid based on the valid information included in the additional information. If it is determined that the time information is valid information, The multimedia data for the generic packet can be output based on the time information included in the additional information.

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

A non-transitory readable medium is a medium that stores data for a short period of time, such as a register, cache, memory, etc., but semi-permanently stores data and is readable by the apparatus. In particular, the various applications or programs described above may be stored on non-volatile readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM,

Although the buses are not shown in the above-described block diagrams for the transmitting apparatus and the receiving apparatus, the communication between the respective elements in the transmitting apparatus and the receiving apparatus may be performed via the bus. Further, each apparatus may further include a processor such as a CPU, a microprocessor, or the like that performs the various steps described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

100: Broadcast transmitting apparatus 110: Generic packet generating unit
120: frame generation unit 120-1: generic header generation unit
120-2: Generic frame generation unit 125: Generic pre-scrambler
200: broadcast receiving apparatus 210:
220: demodulation unit 221: generic packet generation unit
223: additional information generating unit 230:
231: Decoder 233: Stream generator
240: Processor 250: First interface unit
260: second interface unit

Claims (16)

A broadcast receiving apparatus comprising:
A receiving unit for receiving a data stream composed of a plurality of PLPs (Physical Layer Pipes);
Demodulating the plurality of PLPs included in the data stream received from the receiver, generating at least one generic packet corresponding to each of the plurality of PLPs, and additional information for the at least one generic packet, Lt; / RTI > And
A signal processing unit for performing signal processing on the at least one generic packet based on the output additional information;
And the broadcast receiving apparatus. The method according to claim 1,
The additional information,
Wherein the payload is information used for restoring a payload from an upper layer of information not included in the header information of the generic packet or for signal processing. The method according to claim 1,
The additional information,
A plurality of PLPs, each of the plurality of PLPs, sync code information indicating a start of the generic packet, valid information for determining whether the output time of the multimedia data for the generic packet is valid, error information, And order information indicating the order of the broadcast information. The method of claim 3,
The sync code information, the validity information, the error information, the identification information, and the rank information,
And a specific bit size is allocated within one byte. The method of claim 3,
The additional information,
Further comprising time information for outputting the multimedia data to the generic packet,
The time information includes:
And a specific bit size is allocated within 6 bytes. The method according to claim 1,
And first and second interface units for outputting the generic packet related data to the signal processing unit,
The demodulation unit,
Inserts the additional information of the generic packet into the generic packet and outputs at least one of generic packet related data, clock information, and valid information into which the additional information is inserted to the first interface unit,
And outputs the sink information indicating the start of the generic packet into which the additional information is inserted, to the second interface unit. The method according to claim 1,
And first and second interface units for outputting the generic packet related data to the signal processing unit,
The demodulation unit,
Outputting at least one of the generic packet related data, clock information, and valid information to the first interface unit,
Wherein the second interface unit outputs at least one of sync information indicating the start of the generic packet and additional information about the generic packet to the second interface unit. 8. The method according to claim 6 or 7,
The signal processing unit,
And decoding the generic packet for the additional information at a different decoding processing level according to the error information if the additional information output from at least one of the first and second interface units includes error information. . A signal processing method for a broadcast receiving apparatus,
Receiving a data stream composed of a plurality of PLPs;
Demodulating the plurality of PLPs included in the data stream received from the receiver, generating and outputting at least one generic packet corresponding to each of the plurality of PLPs and additional information for the at least one generic packet; And
Performing signal processing on the at least one generic packet based on the additional information;
/ RTI > 10. The method of claim 9,
The additional information,
Wherein the payload is information used for restoring a payload from an upper layer of information not included in the header information of the generic packet or for signal processing. 10. The method of claim 9,
The additional information,
A plurality of PLPs, each of the plurality of PLPs, sync code information indicating a start of the generic packet, valid information for determining whether the output time of the multimedia data for the generic packet is valid, error information, Order information indicating the order of the received signal. 12. The method of claim 11,
The sync code information, the validity information, the error information, the identification information, and the rank information,
And a specific bit size is allocated within one byte. 12. The method of claim 11,
The additional information,
Further comprising time information for outputting the multimedia data to the generic packet,
The time information includes:
And a specific bit size is allocated within 6 bytes. 10. The method of claim 9,
Wherein the outputting step comprises:
Inserts the additional information of the generic packet into the generic packet, outputs at least one of generic packet related data, clock information, and valid information into which the additional information is inserted through the first interface unit,
And outputs the sink 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,
Wherein the outputting step comprises:
Outputting at least one of the generic packet related data, clock information, and valid information through the first interface unit,
Wherein at least one of the sync information indicating the start of the generic packet and the additional information for the generic packet is output through the second interface unit. 16. The method according to claim 14 or 15,
The step of performing the signal processing includes:
And decodes the generic packet for the additional information at a different decoding processing level than the error information if the additional information output from at least one of the first and second interface units includes error information. Processing method.

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