WO2015005715A1 - 방송신호 송신방법, 방송신호 수신방법, 방송신호 송신장치, 방송신호 수신장치 - Google Patents
방송신호 송신방법, 방송신호 수신방법, 방송신호 송신장치, 방송신호 수신장치 Download PDFInfo
- Publication number
- WO2015005715A1 WO2015005715A1 PCT/KR2014/006242 KR2014006242W WO2015005715A1 WO 2015005715 A1 WO2015005715 A1 WO 2015005715A1 KR 2014006242 W KR2014006242 W KR 2014006242W WO 2015005715 A1 WO2015005715 A1 WO 2015005715A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- packet
- data
- block
- merged
- header
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0065—Serial concatenated codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
Definitions
- the present invention relates to a broadcast signal transmission method, a broadcast signal reception method, a broadcast signal transmission device, and a broadcast signal reception device.
- the digital broadcast signal may include a larger amount of video / audio data than the analog broadcast signal, and may include various additional data in addition to the video / audio data.
- the digital broadcasting system for digital broadcasting may provide HD (High Definition) level images, multi-channel sound, and various additional services.
- HD High Definition
- data transmission efficiency for high-capacity data transmission, robustness of the transmission / reception network, and flexibility of the network considering mobile reception equipment still need to be improved.
- an object of the present invention is to provide a broadcast signal transmission apparatus capable of transmitting and receiving broadcast signals for a next generation broadcast service, a broadcast signal receiving apparatus, and a method of transmitting and receiving broadcast signals for next generation broadcast services.
- a method of transmitting a broadcast signal according to the present invention is an input formatting step of processing at least one input stream and outputting the processed signal to at least one data pipe, wherein the data pipe is at least one.
- the input streams comprise at least one IP packet, the at least one IP packet carrying an IP packet header and an IP packet payload And if the at least one IP packet is a fragmented IP packet based on information included in the IP packet header, performing IP packet header compression; Encoding service data of the data pipes; Encoding signaling data, the signaling data including information signaling the one or more service data transmitted through the data pipe; Mapping the encoded service data and the encoded signaling data to generate at least one signal frame; Modulating the generated at least one signal frame in an orthogonal frequency division multiplexing (OFDM) scheme; And transmitting a broadcast signal including the modulated one or more signal frames.
- OFDM orthogonal frequency division multiplexing
- the present invention provides a method for transmitting the broadcast signal, wherein performing the IP packet header compression comprises: extracting at least two or more fragmented IP packets; Merging IP packet payloads included in the extracted fragmented IP packets to generate a merged IP packet payload, and generating a merged IP packet including the generated merged IP packet payload; And the merged IP packet further includes a merged IP packet header generated based on respective IP packet headers included in the extracted fragmented IP packets.
- each of the IP packet headers includes at least one of an Internet Protocol (IP) header, a User Datagram Protocol (UDP) header, and a Real Time Protocol (RTP) header.
- IP Internet Protocol
- UDP User Datagram Protocol
- RTP Real Time Protocol
- the present invention provides a method for transmitting the broadcast signal, wherein the size of the merged IP packet payload is larger than the size of the payload of each of the extracted fragmented IP packets, the respective fragments extracted
- the size of the IP packets may provide a broadcast signal transmission method that is smaller than or equal to the maximum transmission unit (MTU) of the IP packet.
- MTU maximum transmission unit
- the present invention may provide a broadcast signal transmission method in which the signaling data includes information on the at least one IP packet included in the service data.
- the present invention may provide a broadcast signal transmission method in which the signaling data includes information indicating whether or not to include the step of performing the IP packet header compression.
- a method for receiving a broadcast signal includes: receiving at least one broadcast signal; Demodulating the received at least one broadcast signal in an orthogonal frequency division multiplexing (OFDM) scheme; Decoding signaling data included in the signal frame, wherein the signaling data includes information signaling service data included in the signal frame transmitted through a data pipe; Obtaining at least one or more signal frames from the demodulated at least one broadcast signal, wherein the data pipe transmits at least one service or service component; Decoding service data of the data pipes; And outputting the decoded service data, wherein when the service data includes a merged IP packet, splitting the merged IP packet;
- the merged IP packet may include a merged IP packet header and a merged IP packet payload, and the merged IP packet payload may be a broadcast signal receiving method including IP packet payloads of at least two or more IP packets.
- the present invention provides a method for receiving the broadcast signal, wherein the step of splitting the IP packet comprises at least two IPs of a merge IP packet based on information included in the merged IP packet header and information included in the signaling data. Dividing the packet into packets, each of the at least two IP packets including an IP packet header and an IP packet payload, wherein the IP packet header includes information included in the merged IP packet header and each of the divided IP packet pays A broadcast signal receiving method generated based on load information may be provided.
- the present invention provides a method for receiving the broadcast signal, wherein the merged IP packet header includes at least one of an Internet Protocol (IP) header, a User Datagram Protocol (UDP) header, and a Real Time Protocol (RTP) header
- IP Internet Protocol
- UDP User Datagram Protocol
- RTP Real Time Protocol
- the present invention may provide a method for receiving a broadcast signal, in which the size of two or more divided IP packets is smaller than or equal to the size of a maximum transmission unit (MTU) of the IP packet.
- MTU maximum transmission unit
- the present invention may provide a method for receiving a broadcast signal, wherein the signaling data includes information on the at least one IP packet included in the service data.
- the present invention may provide a method for receiving a broadcast signal, wherein the signaling data includes information indicating whether the service data includes the merged IP packet.
- the broadcast signal transmitting apparatus is an input formatter for processing at least one input stream and outputting the same to at least one data pipe, wherein the data pipe transmits at least one service or service component, and the input stream ) Includes at least one IP packet, the at least one IP packet includes an IP packet header and an IP packet payload, and is based on information included in the IP packet header.
- the at least one IP packet is a fragmented IP packet, perform IP packet header compression;
- a transmitter for transmitting a broadcast signal including the modulated one or more signal frames.
- OFDM orthogonal frequency division multiplexing
- the present invention provides a device for transmitting the broadcast signal, IP packet header compression is performed by extracting at least two or more fragmented IP packets, IP contained in the extracted fragmented IP packets Merge packet payloads to generate a merged IP packet payload, and generate a merged IP packet including the generated merged IP packet payload, wherein the merged IP packet is included in the extracted fragmented IP packets
- the broadcast signal transmitting apparatus may further include a merged IP packet header generated based on the configured IP packet headers.
- the present invention provides an apparatus for transmitting the broadcast signal, wherein the IP packet headers each include at least one of an Internet Protocol (IP) header, a User Datagram Protocol (UDP) header, and a Real Time Protocol (RTP) header.
- IP Internet Protocol
- UDP User Datagram Protocol
- RTP Real Time Protocol
- the present invention provides an apparatus for transmitting the broadcast signal, wherein the size of the merged IP packet payload is larger than the size of the payload of the extracted fragmented IP packets, the respective fragments extracted IP packets may provide a broadcast signal transmission apparatus that is smaller than or equal to a maximum transmission unit (MTU) of the IP packet.
- MTU maximum transmission unit
- the present invention provides an apparatus for transmitting the broadcast signal, wherein the signaling data may provide a broadcast signal transmitting apparatus including information on at least one IP packet included in the service data.
- the present invention can provide a broadcast signal transmitting apparatus in the apparatus for transmitting the broadcast signal, the signaling data includes information indicating whether to include the step of performing the IP packet header compression.
- a broadcast signal receiver includes: a receiver configured to receive at least one broadcast signal; A demodulator for demodulating the received at least one broadcast signal using an orthogonal frequency division multiplexing (OFDM) scheme; A decoder for decoding signaling data included in the signal frame, the signaling data including information signaling service data included in the signal frame transmitted through a data pipe; A frame parser for obtaining at least one signal frame from the demodulated at least one broadcast signal, the data pipe transmitting at least one service or service component; A decoder for decoding service data of the data pipe; And outputting the decoded service data, wherein when the service data includes a merged IP packet, splitting the merged IP packet into an IP packet;
- the merged IP packet may include a merged IP packet header and a merged IP packet payload, and the merged IP packet payload may be a broadcast signal receiving apparatus including IP packet payloads of at least two
- the IP packet segmentation may include at least two IP packets including a merged IP packet based on information included in the merged IP packet header and information included in the signaling data. And the at least two IP packets each include an IP packet header and an IP packet payload, wherein the IP packet header includes information included in the merged IP packet header and information of each divided IP packet payload.
- a broadcast signal receiving apparatus generated based on the present invention may be provided.
- the present invention provides a broadcast signal receiving apparatus, wherein the merged IP packet header includes at least one or more of an Internet Protocol (IP) header, a User Datagram Protocol (UDP) header, and a Real Time Protocol (RTP) header.
- IP Internet Protocol
- UDP User Datagram Protocol
- RTP Real Time Protocol
- a signal receiving device can be provided.
- the present invention can provide a broadcast signal receiving apparatus in the broadcast signal receiving apparatus, the size of the divided two or more IP packets is less than or equal to the size of the maximum transmission unit (MTU) of the IP packet.
- MTU maximum transmission unit
- the present invention may provide a broadcast signal receiving apparatus in which the signaling data includes information on the at least one IP packet included in the service data.
- the present invention may provide a broadcast signal receiving apparatus in the broadcast signal receiving apparatus, wherein signaling data includes information indicating whether the service data includes the merged IP packet.
- the present invention can provide an efficient broadcast signal transmission method, a broadcast signal reception method, a broadcast signal transmission device, and a broadcast signal reception device.
- the present invention can increase data transmission efficiency and increase robustness of transmission and reception of broadcast signals.
- FIG. 1 is a diagram illustrating a structure of a transmission apparatus for a next generation broadcast service according to an embodiment of the present invention.
- FIG 2 illustrates an input formatting module according to an embodiment of the present invention.
- FIG 3 illustrates an input formatting module according to another embodiment of the present invention.
- FIG 4 illustrates an input formatting module according to another embodiment of the present invention.
- FIG. 5 illustrates a coding and modulation module according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating a frame structure module according to an embodiment of the present invention.
- FIG. 7 illustrates a waveform generation module according to an embodiment of the present invention.
- FIG. 8 is a diagram illustrating a structure of a reception device for a next generation broadcast service according to an embodiment of the present invention.
- FIG. 9 illustrates a synchronization & demodulation module according to an embodiment of the present invention.
- FIG. 10 illustrates a frame parsing module according to an embodiment of the present invention.
- FIG. 11 illustrates a demapping & decoding module according to an embodiment of the present invention.
- FIG 12 illustrates an output processor according to an embodiment of the present invention.
- FIG 13 illustrates an output processor according to another embodiment of the present invention.
- FIG. 14 illustrates a coding and modulation module according to another embodiment of the present invention.
- FIG. 15 illustrates a demapping & decoding module according to another embodiment of the present invention.
- 16 is a diagram illustrating a mode adaptation module of a broadcast signal transmission apparatus according to another embodiment of the present invention.
- FIG 17 illustrates an example of splitting an IP packet when an IP packet is transmitted through an Ethernet network.
- FIG. 18 illustrates IP packets (a) and (b) input to an input formatting module and an IP packet c output by an input formatting module performing an IP repacking method according to another embodiment of the present invention. Drawing.
- FIG. 19 is a flowchart illustrating an IP repacking method according to another embodiment of the present invention.
- FIG. 20 is a table illustrating overhead sizes of packet headers according to data length when MTUs of IPv4 and IPv6 packets to which header compression is not applied are 1500, 8000, and 16000, respectively.
- FIG. 21 is a graph illustrating the table shown in FIG. 20.
- FIG. 22 is a table illustrating overhead sizes of packet headers according to data length when MTUs of IPv4 and IPv6 packets to which header compression is applied are 1500, 8000, and 16000, respectively.
- FIG. 23 is a graph illustrating the table shown in FIG. 22.
- 24 is a diagram illustrating an output processor module 8300 of the apparatus for receiving broadcast signals according to another embodiment of the present invention.
- 25 is a flowchart of a broadcast signal transmission method according to an embodiment of the present invention.
- 26 is a flowchart of a broadcast signal receiving method according to an embodiment of the present invention.
- the present invention is to provide an apparatus and method for transmitting and receiving broadcast signals for the next generation broadcast service.
- the next generation broadcast service according to an embodiment of the present invention is a concept including a terrestrial broadcast service, a mobile broadcast service, and an ultra high definition television (UHDTV) service.
- the apparatus and method for transmitting a broadcast signal according to an embodiment of the present invention may be categorized into a base profile for a terrestrial broadcast service, a handheld profile for a mobile broadcast service, and an advanced profile for a UHDTV service according to characteristics of a service to be transmitted.
- the base profile may be used as a concept meaning a profile for both terrestrial broadcasting service and mobile broadcasting service. This can be changed according to the designer's intention.
- the broadcast signal for the next generation broadcast service may be processed using a non-MIMO (Multi Input Multi Output) method or a MIMO method.
- the non-MIMO scheme may include a MISO (Multi Input Single Output), a SISO (Single Input Single Output) scheme, and the like.
- multiple antennas of MISO or MIMO may be described with two antennas as an example for convenience of description, but the description of the present invention may be applied to a system using two or more antennas.
- FIG. 1 is a diagram illustrating a structure of a transmission apparatus for a next generation broadcast service according to an embodiment of the present invention.
- a transmission apparatus for a next generation broadcast service includes an input formatting module 1000, a coding and modulation module 1100, a frame structure module 1200, a waveform generation module 1300, and a signaling generation module ( 1400).
- an input formatting module 1000 includes an input formatting module 1000, a coding and modulation module 1100, a frame structure module 1200, a waveform generation module 1300, and a signaling generation module ( 1400).
- a transmission apparatus for a next generation broadcast service includes an MPEG-TS stream, an IP stream (v4 / v6), and a generic stream (GS) as input signals. ) Can be input.
- the terminal may receive additional management information regarding the configuration of each stream constituting the input signal and generate a final physical layer signal by referring to the received additional information.
- the input formatting module 1000 divides the input streams according to a criterion for performing coding and modulation or a service and service component criterion.
- data pipes DP
- the data pipe is a logical channel of the physical layer and can carry service data or related metadata.
- the data pipe may carry one or a plurality of services or one or a plurality of service components.
- data transmitted through a data pipe may be referred to as DP data.
- the input formatting module 1000 divides each generated data pipe into block units necessary for performing coding and modulation, and performs a series of processes necessary for improving transmission efficiency or scheduling. Can be done. Details will be described later.
- the coding and modulation module 1100 performs forward error correction (FEC) encoding on each data pipe received from the input formatting module 1000 to receive an error that may occur in a transport channel. Make corrections in
- the coding and modulation module 1100 according to an embodiment of the present invention can correct the burst error due to the channel by converting the FEC output bit data into symbol data and performing interleaving.
- the coding and modulation module 1100 according to an embodiment of the present invention may process the processed data for each antenna output. You can output it by dividing it by (data path).
- the frame structure module 1200 may map data output from the coding and modulation module 1100 to a signal frame.
- the frame structure module 1200 according to an embodiment of the present invention may perform mapping by using the scheduling information output from the input formatting module 1000, and may obtain data in a signal frame to obtain additional diversity gain. Interleaving may be performed with respect to.
- the waveform generation module 1300 may convert the signal frames output from the frame structure module 1200 into a signal that can be finally transmitted.
- the waveform generation module 1300 according to an embodiment of the present invention inserts a preamble signal (or preamble) for detection of a transmission system, and estimates a transmission channel to compensate for distortion. You can insert a reference signal.
- the waveform generation module 1300 according to an embodiment of the present invention has a guard interval in order to cancel an influence caused by a channel delay spread due to multipath reception, and a specific sequence in a corresponding section. (sequence) can be inserted.
- the waveform generation module 1300 according to an embodiment of the present invention additionally processes necessary for efficient transmission in consideration of signal characteristics such as peak-to-average power ratio of the output signal. Can be performed.
- the signaling generation module 1400 may input input management information and information generated from the input formatting module 1000, the coding and modulation module 1100, and the frame structure module 1200. Final signaling information is generated using the physical layer signaling. Therefore, the reception apparatus according to an embodiment of the present invention can decode the received signal by decoding the signaling information.
- the transmitter for the next generation broadcast service may provide a terrestrial broadcast service, a mobile broadcast service, and a UHDTV service. Therefore, the apparatus for transmitting a next-generation broadcast service according to an embodiment of the present invention may multiplex signals for different services in a time domain and transmit the same.
- FIG. 2 to 4 illustrate an embodiment of the input formatting module 1000 according to an embodiment of the present invention described with reference to FIG. 1. Each figure is demonstrated below.
- FIG. 2 illustrates an input formatting module according to an embodiment of the present invention. 2 illustrates an input formatting module when the input signal is a single input stream.
- an input formatting module may include a mode adaptation module 2000 and a stream adaptation module 2100.
- the mode adaptation module 2000 may include an input interface block 2010, a CRC-8 encoder block 2020, and a BB header insertion block 2030. Each block is briefly described below.
- the input interface block 2010 may output the input single input stream by dividing the input single input stream by a baseband (BB) frame length unit for performing FEC (BCH / LDPC).
- BB baseband
- the CRC-8 encoder block 2020 may add redundancy data by performing CRC encoding on each BB frame data.
- the BB header insertion block 2030 may include a mode adaptation type (TS / GS / IP), a user packet length, a data field length, User Packet Sync Byte, Start Address of User Packet Sync Byte in Data Field, High Efficiency Mode Indicator, Input Stream Synchronization Field ( A header including information such as an input stream synchronization field) may be inserted into a BB frame.
- a mode adaptation type TS / GS / IP
- a user packet length a data field length
- User Packet Sync Byte Start Address of User Packet Sync Byte in Data Field
- High Efficiency Mode Indicator High Efficiency Mode Indicator
- Input Stream Synchronization Field A header including information such as an input stream synchronization field may be inserted into a BB frame.
- the stream adaptation module 2100 may include a padding insertion block 2110 and a BB scrambler block 2120. Each block is briefly described below.
- the padding insertion block 2110 outputs a padding bit to have a required input data length when the data input from the mode adaptation module 2000 is smaller than the input data length required for FEC encoding. can do.
- the BB scrambler block 2120 may randomize the input bit stream by performing an XOR operation on a PRBS-Pseudo Random Binary Sequence.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- the input formatting module may finally output the data pipe to the coding and modulation module.
- FIG. 3 illustrates an input formatting module according to another embodiment of the present invention.
- FIG. 3 is a diagram illustrating a mode adaptation module of an input formatting module when the input signal is multiple input streams.
- the mode adaptation module of the input formatting module for processing multiple input streams may process each input stream independently.
- the mode adaptation module 3000 for processing multiple input streams respectively includes an input interface block, an input stream synchronizer block, a delay compensation block, and null packet cancellation. packet deletion) block, CRC-8 encoder block, and BB header insertion block. Each block is briefly described below.
- the input stream synchronization block 3100 may transmit input stream clock reference (ISCR) information, and may insert timing information necessary to recover a TS or GS stream at a receiving end.
- ISCR input stream clock reference
- the delay compensation block 3200 may output the delayed input data so that the receiving device can synchronize the data when a delay occurs between data pipes according to data processing of the transmitting device together with timing information generated by the input stream synchronization block. have.
- the null packet removal block 3300 may remove an input null packet to be transmitted unnecessarily, and insert and transmit the number of removed null packets according to the removed position.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- FIG 4 illustrates an input formatting module according to another embodiment of the present invention.
- FIG. 4 is a diagram illustrating a stream adaptation module of the input formatting module when the input signals are multiple input streams.
- the stream adaptation module of the input formatting module may include a scheduler 4000, a 1-frame delay block 4100, in-band signaling or padding insertion (In ⁇ ). band signaling or padding insertion block 4200, physical layer signaling generation block 4300, and BB scrambler block 4400. The operation of each block will be described below.
- the scheduler 4000 may perform scheduling for a MIMO system using multiple antennas including dual polarity.
- the scheduler 4000 may be configured in signal processing blocks for each antenna path such as a bit to cell demux block, a cell interleaver block, and a time interleaver block in the coding & modulation module described with reference to FIG. 1. It can generate parameters to be used.
- the 1-frame delay block 4100 divides input data by one transmission frame so that scheduling information for the next frame can be transmitted in the current frame, for example, in-band signaling to be inserted into the data pipe. Can be delayed.
- In-band signaling or padding insertion block 4200 is used for physical layer signaling (PLS) -dynamic signaling that is not delayed to data delayed by one transmission frame. dynamic signaling) information may be inserted.
- PLS physical layer signaling
- the in-band signaling or padding insertion block 4200 may insert padding bits when there is space for padding or insert in-band signaling information into the padding space.
- the scheduler 4000 may output the physical layer signaling-dynamic signaling information for the current frame separately from the in-band signaling. Therefore, a cell mapper, which will be described later, may map input cells according to scheduling information output from the scheduler 4000.
- the physical layer signaling generation block 4300 may generate physical layer signaling data to be transmitted to a data symbol or the like by preamble symbols or transmissions of a transmission frame except for in-band signaling. .
- the physical layer signaling data according to an embodiment of the present invention may be referred to as signaling information.
- the physical layer signaling data according to an embodiment of the present invention may be separated into PLS-pre information and PLS-post information.
- the PLS-free information may include parameters required for encoding PLS-post information and static PLS signaling data
- the PLS-post information may include parameters required for encoding a data pipe. .
- the parameters required to encode the above-described data pipe may be separated into static PLS signaling data and dynamic PLS signaling data.
- the static PLS signaling data is a parameter that can be commonly applied to all frames included in the super frame and can be changed in units of super frames.
- the dynamic PLS signaling data is a parameter that can be applied differently for each frame included in the super frame and can be changed in units of frames. Therefore, the receiving device can decode the PLS-free information to obtain PLS-post information, and decode the PLS-post information to decode the desired data pipe.
- the BB scrambler block 4400 may generate a random binary sequence (PRBS) so that the PAPR value of the output signal of the waveform generation block may be lowered to perform an XOR with the input bit string. As shown in FIG. 4, scrambling of the BB scrambler block 4400 may be applied to both data pipes and physical layer signaling.
- PRBS random binary sequence
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- the stream adaptation module may finally output each data pipe to a coding and modulation module.
- FIG. 5 illustrates a coding and modulation module according to an embodiment of the present invention.
- the coding and modulation module of FIG. 5 corresponds to an embodiment of the coding and modulation module 1100 described with reference to FIG. 1.
- the transmitter for the next generation broadcast service may provide a terrestrial broadcast service, a mobile broadcast service, and a UHDTV service.
- the coding and modulation module may independently process SISO, MISO, and MIMO schemes for each path for input data pipes.
- the transmission apparatus for the next generation broadcast service may adjust QoS for each service or service component transmitted through each data pipe.
- the coding and modulation module includes a first block 5000 for the SISO scheme, a second block 5100 for the MISO scheme, a third block 5200 for the MIMO scheme, and a PLS pre / A fourth block 5300 for processing the post information may be included.
- the coding and modulation module illustrated in FIG. 5 is only an example, and according to a designer's intention, the coding and modulation module may include only the first block 5000 and the fourth block 5300, and the second block 5100. ) And only the fourth block 5300, or may include only the third block 5200 and the fourth block 5300. That is, according to the designer's intention, the coding and modulation module may include blocks for processing each data pipe identically or differently.
- the first block 5000 is a block for SISO processing the input data pipe, the FEC encoder block 5010, the bit interleaver block 5020, the bit to cell demux block 5030, the constellation It may include a mapper block 5040, a cell interleaver block 5050, and a time interleaver block 5060.
- the FEC encoder block 5010 may add redundancy by performing BCH encoding and LDPC encoding on the input data pipe, and correct an error on a transmission channel at a receiving end.
- the bit interleaver block 5020 may interleave the bit string of the data on which the FEC encoding is performed by an interleaving rule so as to be robust to burst errors that may occur in the transport channel. Therefore, when deep fading or erasure is applied to a QAM symbol, since interleaved bits are mapped to each QAM symbol, errors occur in successive bits among all codeword bits. Can be prevented.
- the bit-to-cell demux block 5030 takes into account both the order of the input bit stream and the constellation mapping rule, so that each bit in the FEC block can be transmitted with appropriate robustness. Can be determined and output.
- the constellation mapper block 5040 may map the input bit word to one constellation.
- the constellation mapper block may additionally perform rotation & Q-delay. That is, the constellation mapper block may rotate the input constellations according to a rotation angle and then divide only the quadrature-phase component into an arbitrary value after dividing the constellations into an in-phase component and a quadrature-phase component. The paired I and Q components can then be used to map back to the new constellation.
- the cell interleaver block 5050 randomly mixes and outputs cells corresponding to one FEC block, and outputs cells corresponding to each FEC block in a different order for each FEC block.
- the time interleaver block 5060 may mix and output cells belonging to several FEC blocks. Accordingly, since cells of each FEC block are distributed and transmitted within an interval corresponding to a time interleaving depth, diversity gain can be obtained.
- the second block 5100 is a block for MISO processing the input data pipe.
- the second block 5100 is a FEC encoder block, a bit interleaver block, and a bit to cell demux as in the first block 5000.
- the second block 5100 may include a cell demux block, a constellation mapper block, a cell interleaver block, and a time interleaver block, there is a difference in that it further includes a MISO processing block 5110.
- the second block 5100 performs the same role process from the input to the time interleaver, and thus description of the same blocks will be omitted.
- the MISO processing block 5110 may encode an input series of cells according to an MISO encoding matrix giving transmit diversity and output MISO processed data through two paths.
- MISO processing according to an embodiment of the present invention may include orthogonal space time block coding (OSTBC) / orthogonal space frequency block coding (AKA Alamouti coding).
- OSTBC orthogonal space time block coding
- AKA Alamouti coding orthogonal space frequency block coding
- the third block 5200 is a block for MIMO processing the input data pipe.
- the third block 5200 is an FEC encoder block, a bit interleaver block, a bit-to-cell demux block, and a constellation as in the second block 5100.
- it may include a mapper block, a cell interleaver block, and a time interleaver block, there is a difference in data processing in that it includes a MIMO processing block 5220.
- the FEC encoder block and the bit interleaver block have different specific functions from those of the first and second blocks 5000 and 5100, but have the same basic role.
- the bit-to-cell demux block 5210 may generate an output bit string equal to the number of inputs of the MIMO processing and output the same through the MIMO path for the MIMO processing.
- the bit-to-cell demux block 5210 may be designed to optimize decoding performance of the receiver in consideration of characteristics of LDPC and MIMO processing.
- the constellation mapper block, the cell interleaver block, and the time interleaver block may have different specific functions, the basic role is the same as described in the first and second blocks 5000 and 5100.
- the constellation mapper block, the cell interleaver block, and the time interleaver blocks have a number of MIMO paths for MIMO processing to process an output bit string output from the bit-to-cell demux block. As many as may exist.
- the constellation mapper block, the cell interleaver block, and the time interleaver block may operate identically or independently with respect to data input through each path.
- the MIMO processing block 5220 may perform MIMO processing on the input two input cells using the MIMO encoding matrix and output the MIMO processed data through two paths.
- the MIMO encoding matrix according to an embodiment of the present invention is spatial multiplexing, golden code, full-rate full diversity code, linear dispersion code. code) and the like.
- the fourth block 5300 is a block for processing PLS pre / post information, and may perform SISO or MISO processing.
- bit interleaver block, the bit to cell demux block, the constellation mapper block, the cell interleaver block, the time interleaver block, and the MISO processing block included in the fourth block 5300 are included in the second block 5100.
- the specific functions may be different, but the basic role is the same.
- the Shortened / punctured FEC encoder block 5310 included in the fourth block 5300 is used for the PLS path in case the length of the input data is shorter than the length required to perform FEC encoding.
- the FEC encoding method can be used to process PLS data. Specifically, the Shortened / punctured FEC encoder block performs BCH encoding on the input bit stream, then zero padding the length of the input bit string necessary for normal LDPC encoding, and performs LDPC encoding. The pared bit can then be removed to puncture the parity bits so that the effective code rate is equal to or lower than the data pipe.
- the blocks included in the first block 5000 to the fourth block 5300 described above may be omitted or replaced by other blocks having similar or identical functions according to a designer's intention.
- the coding and modulation module may finally output data pipes, PLS-free information, and PLS-post information processed for each path to the frame structure module.
- FIG. 6 is a diagram illustrating a frame structure module according to an embodiment of the present invention.
- the frame structure module illustrated in FIG. 6 corresponds to an embodiment of the frame structure module 1200 described with reference to FIG. 1.
- the frame structure block includes at least one cell-mapper 6000, at least one delay compensation module 6100 and at least one block interleaver ( 6200).
- the number of cell mapper 6000, delay compensation module 6100, and block interleaver 6200 may be changed according to a designer's intention. Hereinafter, the operation of each module will be described.
- the cell mapper 6000 includes cells corresponding to SISO or MISO or MIMO processed data pipes output from a coding and modulation module, cells corresponding to common data that can be commonly applied between data pipes, and PLS-free / Cells corresponding to the post information may be allocated to the signal frame according to the scheduling information.
- the common data refers to signaling information that may be commonly applied between all or some of the data pipes, and may be transmitted through a specific data pipe.
- the data pipes that carry common data can be called common data pipes, which can be changed according to the designer's intention.
- the mapper 6000 may perform pair-wise cell mapping. That is, the cell mapper 6000 may process two consecutive cells with respect to the input cells as one unit and map them to the frame. Therefore, paired cells in an input path corresponding to an output path of each antenna may be allocated to positions adjacent to each other in a transmission frame.
- the delay compensation block 6100 may delay the input PLS data cell for the next transmission frame by one frame to obtain PLS data corresponding to the current transmission frame.
- the PLS data of the current frame may be transmitted through a preamble part in the current signal frame, and the PLS data for the next signal frame may be pre-amble part in the current signal frame or in-band signaling in each data pipe of the current signal frame. Can be sent through. This can be changed according to the designer's intention.
- the block interleaver 6200 can obtain additional diversity gain by interleaving cells in a transmission block that is a unit of a signal frame.
- the block interleaver 6200 may perform interleaving by processing two consecutive cells with respect to input cells as one unit. Accordingly, the cells output from the block interleaver 6200 may be the same two consecutive cells.
- At least one cell mapper and at least one block interleaver may be input to data input through respective paths.
- the same operation may be performed for the same or independently.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- FIG. 7 illustrates a waveform generation module according to an embodiment of the present invention.
- the waveform generation module illustrated in FIG. 7 corresponds to an embodiment of the waveform generation module 1300 described with reference to FIG. 1.
- the waveform generation module may modulate and transmit signal frames as many as the number of antennas for receiving and outputting signal frames output from the frame structure module described with reference to FIG. 6.
- the waveform generation module illustrated in FIG. 7 is an embodiment of the waveform generation module of a transmission apparatus using m Tx antennas, and includes m processes for modulating and outputting frames input by m paths. It may include blocks. The m processing blocks may all perform the same processing. Hereinafter, the operation of the first processing block 7000 of the m processing blocks will be described.
- the first processing block 7000 includes a reference signal insertion & PAPR reduction block 7100, an inverse waveform transform block 7200, and a PAPR reduction in time.
- DAC digital-to-analog converter
- the reference signal insertion & PAPR reduction block 7100 inserts reference signals at a predetermined position for each signal block and applies a PAPR reduction scheme to lower the PAPR value in the time domain.
- the broadcast transmission / reception system according to the embodiment of the present invention is an OFDM system
- the reference signal insertion & PAPR reduction block 7100 may use a method of preserving without using a portion of an active subcarrier.
- the reference signal insertion & PAPR reduction block 7100 may not use the PAPR reduction scheme as an optional feature according to a broadcast transmission / reception system.
- the inverse-waveform conversion block 7200 may convert and output an input signal in a manner of improving transmission efficiency and flexibility in consideration of characteristics of a transmission channel and a system structure.
- the broadcast transmission / reception system according to an embodiment of the present invention is an OFDM system
- the inverse-waveform transform block 7200 converts a signal in a frequency domain into a time domain using an inverse FFT operation. Can be used.
- the broadcast transmission / reception system according to an embodiment of the present invention is a single carrier system, the inverse-waveform transform block may not be used in the waveform generation module.
- the PAPR reduction in time block 7300 may apply a method for lowering PAPR in the time domain with respect to the input signal.
- the PAPR reduction in time block 7300 may simply use a method of clipping peak amplitude.
- the PAPR reduction in time block 7300 is an optional feature and may not be used according to the broadcast transmission / reception system according to an embodiment of the present invention.
- the guard sequence insertion block 7400 may put a guard interval between adjacent signal blocks and insert a specific sequence if necessary in order to minimize the influence of the delay spread of the transport channel. Therefore, the receiving device can easily perform synchronization or channel estimation.
- the guard sequence insertion block 7400 may insert a cyclic prefix into the guard interval section of the OFDM symbol.
- the preamble insertion block 7500 transmits a known type of signal (preamble or preamble symbol) between the transmitting and receiving devices so that the receiving device can quickly and efficiently detect a target system signal. Can be inserted into the signal.
- the preamble insertion block 7500 may define a signal frame composed of several OFDM symbols and insert a preamble at the beginning of every signal frame. That is, the preamble may carry basic PLS data, and the preamble may be located at the beginning of the frame.
- the waveform processing block 7600 may perform waveform processing on the input baseband signal to match the transmission characteristics of the channel.
- the waveform processing block 7600 may use a method of performing square-root-raised cosine (SRRC) filtering to obtain a reference for out-of-band emission of a transmission signal as an embodiment.
- SRRC square-root-raised cosine
- the waveform processing block 7600 may not be used.
- the other system insertion block 7700 may multiplex signals of a plurality of broadcast transmission / reception systems in a time domain so that data of a broadcast transmission / reception system providing two or more different broadcast services within the same RF signal bandwidth may be transmitted together.
- two or more different systems refer to a system for transmitting different broadcast services.
- Different broadcast services may refer to terrestrial broadcast services or mobile broadcast services.
- data related to each broadcast service may be transmitted through different frames.
- the digital-analog converter block 7800 may convert an input digital signal into an analog signal and output the analog signal.
- the signal output from the digital-to-analog converter block 7800 may be transmitted through m output antennas.
- a transmission antenna according to an embodiment of the present invention may have vertical or horizontal polarity.
- FIG. 8 is a diagram illustrating a structure of a reception device for a next generation broadcast service according to an embodiment of the present invention.
- the reception device for the next generation broadcast service may correspond to the transmission device for the next generation broadcast service described with reference to FIG. 1.
- a reception apparatus for a next generation broadcast service according to an embodiment of the present invention includes a synchronization & demodulation module 8000, a frame parsing module 8100, a demapping & decoding module 8200, and an output. It may include a processor 8300 and a signaling decoding module 8400. Hereinafter, the operation of each module will be described.
- the synchronization & demodulation module 8000 receives an input signal through m reception antennas, performs signal detection and synchronization on a system corresponding to the reception device, and performs the transmission at the transmitting end. Demodulation corresponding to the inverse process can be performed.
- the frame parsing module 8100 may parse the input signal frame and extract data for transmitting a service selected by the user. If the frame parsing module 8100 performs interleaving in the transmitting apparatus, the frame parsing module 8100 may perform deinterleaving as a reverse process. In this case, the position of the signal and data to be extracted may be obtained by decoding the data output from the signaling decoding module 8400 and restoring scheduling information performed by the transmitting apparatus.
- the demapping & decoding module 8200 can perform the deinterleaving process if necessary after converting the input signal into bit domain data.
- the demapping & decoding module 8200 can perform de-mapping on the mapping applied for transmission efficiency, and perform error correction through decoding on an error generated during the transmission channel.
- the demapping & decoding module 8200 can decode the data output from the signaling decoding module 8400 to obtain transmission parameters necessary for demapping and decoding.
- the output processor 8300 may perform a reverse process of various compression / signal processing processes applied by the transmitter to increase transmission efficiency.
- the output processor 8300 may obtain necessary control information from data output from the signaling decoding module 8400.
- the final output of the output processor 8300 corresponds to a signal input to the transmitting device, and may be MPEG-TS, IP stream (v4 or v6), and generic stream.
- the signaling decoding module 8400 can obtain PLS information from the demodulated signal. As described above, the frame parsing module 8100, the demapping & decoding module 8200, and the output processor 8300 may perform functions of the corresponding module by using data output from the signaling decoding module 8400. .
- FIG. 9 is a diagram illustrating a synchronization & demodulation module according to an embodiment of the present invention.
- the synchronization & demodulation module illustrated in FIG. 9 corresponds to an embodiment of the synchronization & demodulation module described with reference to FIG. 8.
- the synchronization & demodulation module illustrated in FIG. 9 may perform a reverse operation of the waveform generation module described with reference to FIG. 7.
- the synchronization & demodulation module is an embodiment of the synchronization & demodulation module of a receiving apparatus using m Rx antennas, and receives signals input by m paths. It may include m processing blocks for demodulation and output. The m processing blocks may all perform the same processing. Hereinafter, the operation of the first processing block 9000 among the m processing blocks will be described.
- the first processing block 9000 includes a tuner 9100, an analog-to-digital converter (ADC) block 9200, a preamble detector 9300, a guard sequence detector 9400, a waveform transform ( waveform transmform block 9500, time / freq sync block 9600, reference signal detector 9700, channel equalizer 9800, and inverse-waveform conversion (Inverse waveform transform) block 9900 may be included.
- ADC analog-to-digital converter
- the tuner 9100 may select a desired frequency band and compensate the magnitude of the received signal to output the analog-to-digital converter (ADC) block 9200.
- ADC analog-to-digital converter
- the analog-to-digital converter (ADC) block 9200 may convert a signal output from the tuner 9100 into a digital signal.
- the preamble detector 9300 may detect a preamble (or a preamble signal or a preamble symbol) to determine whether the digital signal is a signal of a system corresponding to the receiving device. In this case, the preamble detector 9300 may decode basic transmission parameters received through the preamble.
- the guard sequence detector 9400 can detect the guard sequence in the digital signal.
- the time / frequency synchronization block 9600 can perform time / frequency synchronization using the detected guard sequence, and the channel equalizer 9800 uses the detected guard sequence to channel through the received / restored sequences. It can be estimated.
- the waveform transform block 9500 may perform an inverse transform process on the inverse-waveform transform when the transmitting side performs the transform.
- the waveform side block 9500 may perform an FFT conversion process.
- the broadcast transmission / reception system according to an embodiment of the present invention is a single carrier system, when a received time-domain signal is used for processing in the frequency domain or is processed in all in the time domain, Foam side block 9500 may not be used.
- the time / frequency synchronization block 9600 receives output data of the preamble detector 9300, the guard sequence detector 9400, and the reference signal detector 9700, and provides guard sequence detection and block for the detected signal. Carrier frequency synchronization and time synchronization may be performed including block window positioning. In this case, the time / frequency synchronization block 9600 may feed back the output signal of the waveform side block 9500 for frequency synchronization.
- the reference signal detector 9700 may detect the received reference signal. Accordingly, the reception device according to an embodiment of the present invention may perform synchronization or channel estimation.
- the channel equalizer 9800 may estimate a transmission channel from each transmission antenna to each reception antenna from a guard sequence or reference signal, and perform channel compensation on each received data using the estimated channel.
- the inverse-waveform transform block 9900 restores the original waveform to the original received data region when the waveform transform block 9500 performs a waveform transform in order to efficiently perform synchronization and channel estimation / compensation. can do.
- the waveform conversion block 9500 may perform an FFT to perform synchronization / channel estimation / compensation in the frequency domain, and inverse-waveform
- the conversion block 9900 can restore the transmitted data symbols by performing IFFT on the signal for which channel compensation is completed.
- the broadcast transmission / reception system according to an embodiment of the present invention is a multicarrier system, the inverse-waveform conversion block 9900 may not be used.
- FIG. 10 illustrates a frame parsing module according to an embodiment of the present invention.
- the frame parsing module illustrated in FIG. 10 corresponds to an embodiment of the frame parsing module described with reference to FIG. 8.
- the frame parsing module illustrated in FIG. 10 may perform a reverse operation of the frame structure module described with reference to FIG. 6.
- the frame parsing module may include at least one block interleaver 10000 and at least one cell demapper 10100.
- the block interleaver 10000 may perform deinterleaving on data in each signal block unit for data input to each data path of m reception antennas and processed by the synchronization & demodulation module. In this case, as described with reference to FIG. 8, when pair-wise interleaving is performed at the transmitter, the block interleaver 10000 stores two consecutive data for each input path. Can be treated as a pair. Accordingly, the block interleaver 10000 may output two consecutive output data even when deinterleaving is performed. In addition, the block interleaver 10000 may perform an inverse process of the interleaving process performed by the transmitter to output the original data in order.
- the cell demapper 10100 may extract cells corresponding to common data, cells corresponding to a data pipe, and cells corresponding to PLS data from the received signal frame. If necessary, the cell demapper 10100 may output data in one stream by merging the data transmitted by being distributed into several parts. In addition, as described in FIG. 6, when two consecutive cell input data are processed and mapped as a pair at the transmitting end, the cell demapper 10100 processes two consecutive input cells as one unit in a reverse process corresponding thereto. Pair-wise cell demapping may be performed.
- the cell demapper 10100 may extract and output both PLS signaling data received through the current frame as PLS-free & PLS-post data, respectively.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- FIG. 11 illustrates a demapping & decoding module according to an embodiment of the present invention.
- the demapping & decoding module illustrated in FIG. 11 corresponds to an embodiment of the demapping & decoding module described with reference to FIG. 8.
- the demapping & decoding module illustrated in FIG. 11 may perform a reverse operation of the coding and modulation module described with reference to FIG. 5.
- the coding and modulation module of the transmitting apparatus may independently apply and process SISO, MISO and MIMO schemes for each path to input data pipes. Accordingly, the demapping & decoding module illustrated in FIG. 11 may also include blocks for SISO, MISO, and MIMO processing of data output from the frame parser in response to the transmitting apparatus.
- the demapping & decoding module includes a first block 11000 for the SISO scheme, a second block 11100 for the MISO scheme, and a third for the MIMO scheme.
- a block 11200 and a fourth block 11300 for processing PLS pre / post information may be included.
- the demapping & decoding module shown in FIG. 11 is only an embodiment, and according to the designer's intention, the demapping & decoding module may include only the first block 11000 and the fourth block 11300, and the second block. Only the first block 11100 and the fourth block 11300 may be included, or only the third block 11200 and the fourth block 11300 may be included. That is, according to the designer's intention, the demapping & decoding module can include blocks for processing each data pipe identically or differently.
- the first block 11000 is a block for SISO processing the input data pipe, and includes a time de-ineterleaver block 11010, a cell de-interleaver block 11020, and a constellation diagram. Includes a destellar demapper block 11030, a cell to bit mux block 11040, a bit de-interleaver block 11050, and an FEC decoder block 11060. can do.
- the time deinterleaver block 11010 may perform a reverse process of the time interleaver block 5060 described with reference to FIG. 5. That is, the time deinterleaver block 11010 may deinterleave the interleaved input symbols to their original positions in the time domain.
- the cell deinterleaver block 11020 may perform a reverse process of the cell interleaver block 5050 described with reference to FIG. 5. That is, the cell deinterleaver block 11020 may deinterleave the positions of cells spread within one FEC block to the original positions.
- the constellation de-mapper block 11030 may perform a reverse process of the constellation mapper block 5040 described with reference to FIG. 5. That is, the constellation de-mapper block 11030 may demap an input signal of a symbol domain into data of a bit domain. In addition, the constellation de-mapper block 11030 may perform hard decision to output the deciphered bit data, and may correspond to a soft decision value or a probabilistic value. A log-likelihood ratio (LLR) of bits can be output. If the constellation rotation is applied to obtain additional diversity gain at the transmitter, the constellation de-mapper block 11030 may perform corresponding 2-dimension LLR demapping. In this case, when the LLR is calculated, the constellation de-mapper block 11030 may perform calculation to compensate for the delay value performed on the I or Q component in the transmitting apparatus.
- LLR log-likelihood ratio
- the cell to bit mux block 11040 may perform a reverse process of the bit to cell demux block 5030 described with reference to FIG. 5. That is, the cell to bit mux block 11040 may restore the bit data mapped in the bit to cell demux block 5030 to the original bit stream form.
- the bit deinterleaver block 11050 may perform a reverse process of the bit interleaver block 5020 described with reference to FIG. 5. That is, the bit deinterleaver block 11050 may deinterleave the bit stream output from the cell to bit mux block 11040 in the original order.
- the FEC decoder block 11060 may perform an inverse process of the FEC encoder block 5010 described with reference to FIG. 5. That is, the FEC decoder block 11060 may correct an error generated on a transport channel by performing LDPC decoding and BCH decoding.
- the second block 11100 is a block for MISO processing the input data pipe. As shown in FIG. 11, the second block 11100 is a time deinterleaver block, a cell deinterleaver block, and a constellation D as in the first block 11000. It may include a mapper block, a cell-to-bit mux block, a bit de-interleaver block, and an FEC decoder block, but differs in that it further includes a MISO decoding block 1110. Like the first block 11000, the second block 11100 performs the same role from the time deinterleaver to the output, and thus description of the same blocks will be omitted.
- the MISO decoding block 11110 may perform an inverse process of the MISO processing block 5110 described with reference to FIG. 5.
- the MISO decoding block 11110 may perform Alamouti decoding.
- the third block 11200 is a block for MIMO processing the input data pipe, and as shown in FIG. 11, the time de-interleaver block, the cell de-interleaver block, and the constellation D as in the second block 11100. It may include a mapper block, a cell-to-bit mux block, a bit de-interleaver block, and an FEC decoder block, but there is a difference in data processing in that it includes a MIMO decoding block 1112. Operation of the time de-interleaver, cell de-interleaver, constellation de-mapper, cell-to-bit mux, and bit de-interleaver blocks included in the third block 11200 may be performed in the first to second blocks 11000-11100. The operation and specific functions of the corresponding blocks included may be different, but the basic roles are the same.
- the MIMO decoding block 1112 may receive output data of the cell deinterleaver for m reception antenna input signals, and perform MIMO decoding as a reverse process of the MIMO processing block 5220 described with reference to FIG. 5.
- the MIMO decoding block 1210 may perform maximum likelihood decoding, or perform sphere decoding with reduced complexity, in order to obtain the best decoding performance.
- the MIMO decoding block 1112 may perform MMSE detection or combine iterative decoding together to secure improved decoding performance.
- the fourth block 11300 is a block for processing PLS pre / post information and may perform SISO or MISO decoding.
- the fourth block 11300 may perform a reverse process of the fourth block 5300 described with reference to FIG. 5.
- the operations of the time deinterleaver, cell de-interleaver, constellation de-mapper, cell-to-bit mux, and bit de-interleaver blocks included in the fourth block 11300 are included in the first to third blocks 11000-11200.
- the operation and specific functions of the corresponding blocks may be different, but the basic roles are the same.
- the Shortened / Punctured FEC decoder 11310 included in the fourth block 11300 may perform the reverse process of the Shortened / punctured FEC encoder block 5310 described with reference to FIG. 5. have. That is, the Shortened / Punctured FEC decoder 11310 is shortened / punctured according to the length of the PLS data to de-shortening and de-puncturing the received data. FEC decoding may be performed after In this case, since the FEC decoder used for the data pipe can be used for the PLS in the same way, since there is no need for a separate FEC decoder hardware for the PLS, there is an advantage in that system design is easy and efficient coding is possible.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- the demapping & decoding module can output data pipes and PLS information processed for each path to an output processor.
- FIG 12 illustrates an output processor according to an embodiment of the present invention.
- the output processor illustrated in FIG. 12 corresponds to an embodiment of the output processor described with reference to FIG. 8.
- the output processor illustrated in FIG. 12 receives a single data pipe output from the demapping & decoding module to output a single output stream, and can perform a reverse operation of the input formatting module described with reference to FIG. 2.
- the output processor illustrated in FIG. 12 may include a BB scrambler block 12000, a padding removal block 12100, a CRC-8 decoder block 12200, and a BB frame processor block 12300.
- the BB scrambler block 12000 may generate the same PRBS as used in the transmitter for the input bit stream, and perform descrambling by XORing the bit string.
- the padding removal block 12100 may remove the padding bit inserted in the transmitter.
- the CRC-8 decoder block 12200 may check a block error by performing CRC decoding on the bit stream received from the padding removal block 12100.
- the BB frame processor block 12300 may decode the information transmitted in the BB frame header and restore the MPEG-TS, the IP stream (v4 or v6) or the generic stream using the decoded information.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- FIG 13 illustrates an output processor according to another embodiment of the present invention.
- the output processor illustrated in FIG. 13 corresponds to an embodiment of the output processor described with reference to FIG. 8.
- the output processor illustrated in FIG. 13 corresponds to a case of receiving multiple data pipes output from the demapping & decoding module. Decoding for multiple data pipes is performed when the common data that can be commonly applied to multiple data pipes and their associated data pipes are decoded, or when the receiving device has multiple services or service components (scalable video services). service)) may be simultaneously decoded.
- the output processor illustrated in FIG. 13 may include a BB descrambler block, a padding removal block, a CRC-8 decoder block, and a BB frame processor block as in the output processor described with reference to FIG. 12.
- the operation of the blocks and the specific operation may be different, but the basic role is the same.
- the de-jitter buffer block 13000 included in the output processor illustrated in FIG. 13 recovers delays arbitrarily inserted at a transmitter for synchronization between multiple data pipes. You can compensate according to the parameters.
- null packet insertion block 13100 may restore the null packet removed in the stream by referring to the recovered null packet (DNP) information and output common data.
- DNP recovered null packet
- the TS clock regeneration block 13200 may restore the detailed time synchronization of the output packet based on the input stream time reference (ISCR) information.
- ISCR input stream time reference
- the TS recombining block 13300 recombines the common data and the associated data pipes output from the null packet insertion block 13100 to reconstruct the original MPEG-TS, IP stream (v4 or v6) or generic stream. It can be restored to (Generic stream) and printed. TTO, DNP, and ISCR information may all be obtained through a BB frame header.
- the in-band signaling decoder block 13400 may restore and output in-band physical layer signaling information transmitted through a padding bit field in each FEC frame of the data pipe.
- the output processor shown in FIG. 13 descrambles the PLS-free information and the PLS-post information input according to the PLS-free path and PLS-post path, respectively, and decodes the descrambled data. You can restore the original PLS data by doing
- the recovered PLS data is delivered to a system controller in the receiving device, and the system controller can supply the necessary parameters to the synchronization & demodulation module, the frame parsing module, the demapping & decoding module, and the output processor module of the receiving device.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- FIG. 14 illustrates a coding and modulation module according to another embodiment of the present invention.
- the coding and modulation module illustrated in FIG. 14 corresponds to another embodiment of the coding and modulation module described with reference to FIGS. 1 and 5.
- the module in order to adjust QoS for each service or service component transmitted through each data pipe, the module includes a first block 14000 for an SISO scheme and an MISO scheme. It may include a second block 14100 for, a third block 14200 for MIMO scheme, and a fourth block 14300 for processing PLS pre / post information.
- the coding and modulation module according to an embodiment of the present invention may include blocks for processing the same or different data pipes according to the designer's intention as described above.
- the first to fourth blocks 14000-14300 illustrated in FIG. 14 include blocks that are substantially the same as the first to fourth blocks 5000-5300 described with reference to FIG. 5.
- the function of the constellation mapper block 14010 included in the first to third blocks 14000-14200 is the constellation mapper block included in the first to third blocks 5000-5200 of FIG. 5.
- a rotation & I / Q interleaver block 1420 is included between the cell interleaver and the time interleaver of the first to fourth blocks 14000-14300.
- the configuration of the third block 14200 for the point and the MIMO scheme is different in that the configuration of the third block 5200 for the MIMO scheme shown in FIG. 5 is different.
- a description of the same blocks as in FIG. 5 will be omitted and the description will be given based on the above-described differences.
- the constellation mapper block 14010 illustrated in FIG. 14 may map an input bit word into a complex symbol. However, unlike the constellation mapper block 5040 illustrated in FIG. 5, constellation rotation may not be performed.
- the constellation mapper block 14010 illustrated in FIG. 14 may be commonly applied to the first to third blocks 14000-14200 as described above.
- the rotation & I / Q interleaver block 1420 may independently interleave the in-phase and quadrature-phase components of each complex symbol of the cell interleaved data output from the cell interleaver and output them in symbol units.
- the number of input data and output symbols of the rotation & I / Q interleaver block 14020 is two or more, which can be changed according to the designer's intention.
- the rotation & I / Q interleaver block 1420 may not interleave the in-phase component.
- the rotation & I / Q interleaver block 1420 may be commonly applied to the first to fourth blocks 14000-14300 as described above. In this case, whether the rotation & I / Q interleaver block 1420 is applied to the fourth block 14300 for processing PLS pre / post information may be signaled through the above-described preamble.
- the third block 14200 for the MIMO scheme may include a Q-block interleaver block 14210 and a complex symbol generator block 1422, as shown in FIG. 14.
- the Q-block interleaver block 14210 may perform permutation on the parity part of the FEC block on which the FEC encoding received from the FEC encoder is performed. Through this, the parity part of the LDPC H matrix can be made into a cyclic structure in the same manner as the information part.
- the Q-block interleaver block 14210 permutates the order of output bit blocks having a Q size of the LDPC H matrix, and then performs a row-column block interleaving to generate a final bit string. Can be generated and printed.
- the complex symbol generator block 1422 may receive the bit streams output from the Q-block interleaver block 14210, and map the bit strings to complex symbols. In this case, the complex symbol generator block 1422 may output symbols through at least two paths. This can be changed according to the designer's intention.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- the coding and modulation module may output data pipes, PLS-free information, and PLS-post information processed for each path to the frame structure module. have.
- FIG. 15 illustrates a demapping & decoding module according to another embodiment of the present invention.
- the demapping & decoding module illustrated in FIG. 15 corresponds to another embodiment of the demapping & decoding module described with reference to FIGS. 8 and 11.
- the demapping & decoding module illustrated in FIG. 15 may perform a reverse operation of the coding and modulation module described with reference to FIG. 14.
- the demapping & decoding module includes a first block 15000 for the SISO method, a second block 15100 for the MISO method, and a third for the MIMO method.
- a block 15200 and a fourth block 15300 for processing PLS pre / post information may be included.
- the demapping & decoding module according to an embodiment of the present invention may include blocks for processing the same or different data pipes according to the designer's intention as described above.
- the first to fourth blocks 15000-15300 illustrated in FIG. 15 include blocks that are substantially the same as the first to fourth blocks 11000-11300 described with reference to FIG. 11.
- an I / Q de-interleaver & de-rotation block between the time de-interleaver and the cell de-interleaver of the first to fourth blocks 15000-15300 15010 is included, the function of the constellation de-mapper block 15020 included in the first to third blocks (15000-15200) is the first to third blocks (11000-11200) of FIG. It is different from the function of the constellation mapper block 11030 included in the configuration of the third block 15200 for the MIMO scheme and the configuration of the third block 11200 for the MIMO scheme shown in FIG. There is a difference.
- the description of the same blocks as in FIG. 11 will be omitted and the description will be given based on the above-described differences.
- the I / Q deinterleaver & derotation block 15010 may perform a reverse process of the rotation & I / Q interleaver block 14020 described with reference to FIG. 14. That is, the I / Q deinterleaver & derotation block 15010 can deinterleave the I and Q components transmitted by I / Q interleaving at the transmitting end, respectively, and has a complex having the reconstructed I / Q component. You can de-rotate the symbol and output it again.
- the I / Q deinterleaver & derotation block 15010 may be commonly applied to the first to fourth blocks 15000-15300 as described above. In this case, whether the I / Q de-interleaver & de-rotation block 15010 is applied to the fourth block 15300 for processing PLS pre / post information may be signaled through the above-described preamble.
- the constellation de-mapper block 15020 may perform a reverse process of the constellation mapper block 14010 described with reference to FIG. 14. That is, the constellation de-mapper block 15020 may perform demapping on cell deinterleaved data without performing de-rotation.
- the third block 15200 for the MIMO scheme may include a complex symbol parsing block 15210 and a Q-block deinterleaver block 15220, as shown in FIG. 15. Can be.
- the complex symbol parsing block 15210 may perform a reverse process of the complex symbol generator block 1422 described with reference to FIG. 14. In other words, the complex data symbol may be parsed, demapping into bit data, and output. In this case, the complex symbol parsing block 15210 may receive complex data symbols through at least two paths.
- the Q-block deinterleaver block 15220 may perform a reverse process of the Q-block interleaver block 14210 described with reference to FIG. 14. That is, the Q-block deinterleaver block 15220 restores the Q size blocks by row-column deinterleaving, restores the order of each permutated block in the original order, and then executes the parity decode. Through interleaving, the positions of parity bits may be restored and output.
- the aforementioned blocks may be omitted or replaced by other blocks having similar or identical functions according to the designer's intention.
- the demapping & decoding module may output data pipes and PLS information processed for each path to an output processor.
- an input formatting module may include a mode adaptation module 2000 and a stream adaptation module 2100.
- the mode adaptation module 2000 includes an input interface block 2010, a CRC-8 encoder block 2020, and a BB header insertion block (20). 2030). The specific operation of each block is the same as described above.
- the mode adaptation module 2000 may divide and output the input streams according to a criterion for performing coding and modulation or a service and service component criterion.
- the mode adaptation module 2000 may transmit each data stream divided for each service or service component to the stream adaptation module 2100 through a plurality of data pipes (DP).
- DP data pipes
- the stream that can be input to the mode adaptation module according to an embodiment of the present invention may include an IP stream.
- the IP stream may include IP datagram packets of various sizes.
- the IP datagram packet may include an IP packet header.
- a maximum transmission unit (MTU) of an IP packet transmitted through an Ethernet network may be set to 1500 bytes.
- MTU maximum transmission unit
- a broadcasting station or a server may divide and transmit the broadcast signal based on the MTU size (1500 bytes) of the IP packet.
- the size of the divided IP packet may be equal to or smaller than the MTU size.
- the broadcast signal transmission apparatus may compress an IP packet header for efficient transmission when a plurality of IP packets transmitted through an Ethernet network are input.
- the broadcast signal transmission apparatus may generate one IP packet by merging the plurality of IP packets by expanding the MTU when a plurality of IP packets are input. Therefore, the plurality of IP packet headers may be reconfigured into one merged IP packet header, thereby reducing the overhead of the IP header.
- the broadcast signal transmission apparatus may transmit MTU values of a plurality of input IP packets so that the broadcast reception device may restore the form of a plurality of IP packets input to the broadcast signal transmission apparatus.
- 16 is a diagram illustrating a mode adaptation module of a broadcast signal transmission apparatus according to another embodiment of the present invention.
- (a) is a diagram illustrating a mode adaptation module that can be applied when the input stream is an IP stream.
- (b) illustrates an IP repacking module 16000 of a mode adaptation module that may be applied when the input stream is an IP stream.
- the mode adaptation module may demultiplex a single or a plurality of input IP streams into a service or a service component unit transmitted through DPs.
- the input formatting module 1000 of the apparatus for transmitting broadcast signals may receive one or more IP streams v4 / v6 as described above.
- the mode adaptation module 2000 of the input formatting module described above with reference to FIG. 3 includes a pre-processing module, an IP repacking module 16000, an input interface module, and a header compression. Compression) module and BB-frame header insertion module may be included.
- a pre-processing module an IP repacking module 16000
- an input interface module an input interface module
- BB-frame header insertion module may be included.
- Operations of the BB frame header insertion module and the input interface module are the same as described above with reference to FIGS. 2 and 3, and thus will be omitted.
- the pre-processing module may split and output a plurality of IP streams input to the broadcast signal transmission apparatus into service data or service component (video, audio, etc.) data.
- service data or service component data divided by the pre-processing module may be input to the IP repacking module 16000 for each DP.
- the IP repacking module 16000 may include a sequence packet check module 16010 and a packet merge module 1620.
- the sequence packet check module 16010 may receive service data or service component data and MTU extension value from the pre-processing module for each DP.
- the MTU extension value received by the sequence packet check module 16010 may be 8000 bytes or 16000 bytes.
- the above-described MTU extension value is only an embodiment and may be changed to an appropriate value according to a designer's intention.
- the sequence packet check module may determine whether service data or service component data input to the sequence packet check module is a sequence packet.
- a sequence packet means two or more IP packets carrying the same service or the same service component.
- a sequence packet is generated when a broadcasting station transmits a large amount of data (for example, HDTV and UDTV video component data) through an Ethernet network in the form of an IP packet.
- a specific example of generating a sequence packet and a concrete method of determining whether the input service data or service component data is a sequence packet will be described later.
- the packet including the IP header among the sequence packets may be referred to as a sequence IP packet.
- a sequence IP packet input to an input formatting module according to an embodiment of the present invention may be referred to as a fragmented IP packet.
- the packet merging module 1620 may merge IP packet payloads of IP packets determined by the sequence packet check module 16010 as a sequence packet.
- the size of the merged IP packet payload may be determined based on the input MTU extension value of the sequence packet check module.
- the header compression module 1630 may perform packet header compression included in an input stream to increase transmission efficiency.
- the header compression module 1630 may compress the header by removing the same IP packet header that is duplicated at the transmitting end so that the receiver does not receive a duplicate signal of a known type (IP packet header in this embodiment). have.
- the header compression module 1630 may perform header compression by reconfiguring headers of the sequence IP packets into one IP packet header. A method of reconfiguring IP packet headers will be described later.
- the MTU extension value output from the preprocessing module and input to the consequence packet check module, and the MTU (original MTU mode) information used when transmitted through the Ethernet network output from the preprocessing module, are BB header insertion module or signaling generation module. Can be entered.
- MTU (Original MTU mode) information used when transmitted through the Ethernet network output from the preprocessing module may be included in the BB frame header or transmitted in signaling information.
- the original MTU mode information may be used by the receiving device to recover or retransmit the IP packet.
- the signaling information may include information indicating whether the header compression module 1630 has performed packet header compression.
- the operation of the IP repacking module 16000 may be performed by the header compression module 1630.
- FIG 17 illustrates an example of splitting an IP packet when an IP packet is transmitted through an Ethernet network.
- (a) is a diagram illustrating an IP packet including a UD I-frame 17000 generated by a broadcasting station.
- the size of the data of the UD I-frame is 2000 bytes.
- the IP packet may include an IP packet header 1730 and a UD I-frame 17000.
- the IP packet header 1730 may include an Internet Protocol (IP) header (shown as IP in the figure), a User Datagram Protocol (UDP) header (shown as UDP in the figure), and a Real Time Protocol (RTP) header as shown in the figure. (Indicated by RTP in the figure).
- IP Internet Protocol
- UDP User Datagram Protocol
- RTP Real Time Protocol
- the IP header may include IP address information. IP address information is information for identifying between devices in a computer network.
- the UDP header may include port number information.
- the port number information means a number for identifying a virtual logical communication connection end used in the UDP protocol.
- the RTP header may include time stamp information.
- the time stamp information means information indicating a time relationship between packets.
- (b) shows that when an IP packet is transmitted through an Ethernet network and the maximum transmission unit (MTU) is limited to 1500 bytes, an IP packet including a UD I-frame (2000 bytes) is divided into two IP packets. It is a figure which shows the example of division
- two IP packets shown in (b) are generated by being divided from an IP packet including a UD I-frame and may be referred to as a sequence packet.
- IP address information, port number information, and time stamp information included in the IP packet headers 17040 and 17050 of the two sequence packets are the same.
- the size of the IP packet payload of the two sequence packets is 1448 bytes (17010) and 512 bytes (17050), respectively.
- the size of the IP packet payload of the two sequence packets may be 1448 bytes 17010 and 552 bytes 1750, respectively.
- the sum of the IP IP packet payloads of the consequence packets may be equal to the size (2000 bytes) of data included in the UD I-frame.
- the size of the IP packet header may vary. Therefore, as the size of the IP packet header of each IP packet is changed in the process of splitting into a sequence packet, a check sum value may also vary.
- FIG. 18 illustrates IP packets (a) and (b) input to an input formatting module and an IP packet c output by an input formatting module performing an IP repacking method according to another embodiment of the present invention. Drawing.
- FIG. 1 is a diagram showing an IP packet including an IP packet header 18001 and an IP packet payload (1448 bytes) 18011.
- FIG. 1 is a diagram showing an IP packet including an IP packet header 18001 and an IP packet payload (1448 bytes) 18011.
- FIG. 1 is a diagram showing an IP packet including an IP packet header 18001 and an IP packet payload (1448 bytes) 18011.
- FIG. 1 is a diagram showing an IP packet including an IP packet header 18001 and an IP packet payload (1448 bytes) 18011.
- (b) shows an IP packet including an IP packet header 18002 and an IP packet payload (512 bytes) 18012.
- (c) shows an IP packet including an IP packet header 1801 and an IP packet payload (2000 bytes) 1820.
- (c) is a view showing an IP packet that can be output by the IP repacking module according to another embodiment of the present invention by performing the IP repacking method shown in (a) and (b).
- the IP repacking module may output the merged IP packet payload 1820 by merging the IP packet payloads 18010.
- the header compression module may reconstruct the IP packet headers 18000 and output the reconstructed IP packet header 18003. Detailed operations of the IP repacking module and the header compression module will be described later.
- FIG. 19 is a flowchart illustrating an IP repacking method according to another embodiment of the present invention.
- IP repacking method performed by the IP repacking module of the input formatting module will be described.
- the IP repacking module separates the IP packet header of the input IP packets.
- the IP repacking module may compare IP address information, port number information, and time stamp information included in two separated IP packet headers. If the IP repacking module compares the information included in the two IP packet headers and determines that the two IP packets are divided from the same UD I-frame, the IP repacking module may merge the two IP packets.
- the pre-processing module may divide the IP stream among the received input streams into service data or service component data for each DP.
- the IP repacking module may separate an IP packet header from service data or service component data divided by DPs (S19000).
- the IP repacking module separates the first IP packet header and the second IP packet header. By comparison, it can be determined whether it is a sequence packet.
- the IP repacking module may determine whether the IP repacking module is a sequence packet based on information included in a header of the received IP packet.
- the IP repacking module may calculate the sum and the sum of the size (or length) of the payload of the sequence IP packets.
- the header compression module may generate an IP packet header of the merged sequence IP packet based on the size (or length) and checksum of the calculated sequence IP packet payload.
- the IP packet header of the merged sequence IP packet may be generated by the IP repacking module.
- the IP repacking module may merge the two IP packet payloads determined as the sequence IP packets into one IP packet payload (S19030).
- the IP repacking module may merge based on the data structure of the UD I-frame, which is before being split into two sequence IP packets.
- the IP packet header may include information of the data structure of the UD I-frame.
- the input formatting module applies the IP repacking method to two sequence IP packets is an embodiment, and may be applied to two or more sequence IP packets.
- the IP header, the UDP header, and the RTP header included in the IP packet header are embodiments, and are not limited thereto.
- the value of the maximum transmission unit input to the IP repacking module may also be changed according to the designer's intention. have.
- FIG. 20 is a table illustrating overhead sizes of packet headers according to data length when MTUs of IPv4 and IPv6 packets to which header compression is not applied are 1500, 8000, and 16000, respectively.
- the unit of each number shown in the table is a byte, and the unit is omitted in the following description.
- IPv6 has a larger value overhead than IPv4.
- the IPv4 and IPv6 are the same as the MTU of 1500 and the overhead values are 48 and 68, respectively.
- the overheads of IPv4 and IPv6 are constant at 48 and 68, respectively, when the data length is 1000 to 8000.
- IPv4 and IPv6 are constant at 96 and 136, respectively.
- the overheads of IPv4 and IPv6 are constant at 144 and 204 when the data length is 17000 to 20000.
- the increase rate of the overhead size decreases as the size of the MTU increases.
- FIG. 21 is a graph illustrating the table shown in FIG. 20.
- the horizontal axis represents the length of an IP packet payload, that is, a data length, which can be included in one IP packet.
- the vertical axis represents data overhead.
- the overhead size is the same.
- the increase rate of the overhead decreases as the MTU increases.
- FIG. 22 is a table illustrating overhead sizes of packet headers according to data length when MTUs of IPv4 and IPv6 packets to which header compression is applied are 1500, 8000, and 16000, respectively.
- the unit of each number shown in the table is a byte, and the unit is omitted in the following description.
- IPv6 has a larger value overhead than IPv4.
- the IPv4 and IPv6 are the same as the MTU of 1500 and the overhead values are 48 and 68, respectively. This is the same as the overhead value when header compression is not applied. However, the longer the data length is, the more the overhead value increases compared to the case where the MTU is 1500.
- the overheads of IPv4 and IPv6 are constant at 48 and 68, respectively, when the data length is 1000 to 8000.
- the overheads of IPv4 and IPv6 are constant at 56 and 74, respectively, when the data length is 9000 to 16000.
- the overheads of IPv4 and IPv6 are constant at 68 and 80, respectively, when the data length is 17000 to 20000.
- the overhead when header compression is applied has a smaller size than the overhead when header compression is not applied.
- FIG. 23 is a graph illustrating the table shown in FIG. 22.
- the horizontal axis represents the length of an IP packet payload, that is, a data length, which can be included in one IP packet.
- the vertical axis represents data overhead.
- the overhead size is the same.
- the increase rate of the overhead decreases as the MTU increases.
- the MTU extension value is the same, it can be seen that the size of the overhead when the header compression is applied is smaller than that when the header compression is not applied.
- 24 is a diagram illustrating an output processor module 8300 of the apparatus for receiving broadcast signals according to another embodiment of the present invention.
- the output processor module 8300 may perform a reverse process of various compression / signal processing processes applied by the transmitter to increase transmission efficiency.
- the output processor module 8300 may include a BB frame header parser module, a header decompression module, an MTU reduction module, and an IP multiplexer module.
- the output processor module of the broadcast signal receiving apparatus according to an embodiment of the present invention may perform a reverse process of the input formatting module of the broadcast transmitting apparatus according to an embodiment of the present invention.
- the MTU reduction module may include a packet length check module and a packet splitting module.
- the BB frame header parser module may separate a header from service data de-mapped and decoded in the form of a BB frame.
- the BB frame header parser module may perform a process of separating the header inserted into the BB frame by the BB frame header insertion module 2030 of the transmitting apparatus.
- the header de-compression module may restore the compressed header in such a manner that the header compression module of the transmitting apparatus deletes or reconstructs a duplicate header.
- the MTU reduction module 24000 may include a packet length check module 24010 and a packet splitting module 2520.
- the MTU reduction module may be used when the broadcast reception device according to an embodiment of the present invention retransmits an IP packet received through an Ethernet network or converts an IP packet received through an Ethernet network by a broadcast transmission device.
- the packet length check module 24010 may determine whether to merge the IP packet input to the packet length check module based on the signaling information or the original MTU mode information included in the BB frame header.
- the packet length check module may output the merged IP packet and the original MTU mode information to the packet splitting module 2520.
- the packet splitting module 24020 may split the input IP packet based on the input original MTU mode information.
- the packet length check module may calculate a cyclic redundancy check (CRC) and insert it into the divided IP packet.
- CRC cyclic redundancy check
- Modules included in the output processor module described above may be independently applied to IP packets for each DP.
- IP packets processed and output independently for each DP may be input to an IP multiplexer (IP Mux) module.
- IP Mux IP multiplexer
- the IP multiplexer module may output the input IP packets in the form of an IP stream.
- 25 is a flowchart of a broadcast signal transmission method according to an embodiment of the present invention.
- the broadcast signal transmission apparatus may output at least one input stream to at least one data pipe.
- the data pipe transmits at least one service or service component.
- the service or service component transmitted through the data pipe may be referred to as service data.
- the input stream input to the apparatus for transmitting broadcast signals according to an embodiment of the present invention may include at least one packet among IP, TS, and GS packets.
- the IP packet may include an IP packet header and an IP packet payload.
- the broadcast signal transmission apparatus may perform IP packet header compression when two or more fragmented IP packets are input to the broadcast signal transmission apparatus.
- the broadcast signal transmission apparatus extracts two or more fragmented IP packets and merges the IP packet payloads included in the extracted fragmented IP packets to generate a merged IP packet. Can be.
- the merged IP packet may include a merged IP packet header.
- the broadcast signal transmission apparatus may generate a merged IP packet header based on the IP packet headers of the fragmented fragmented IP packet.
- the size of the fragmented IP packet may be less than or equal to the MTU of the IP packet transmitted in the Ethernet network, that is, 1500 bytes.
- the size of the merged IP packet may be larger than the size of each of the two or more fragmented IP packets to be merged.
- the size of the merged IP packet may be larger than the MTU (1500 bytes) of the IP packet transmitted in the Ethernet network.
- the apparatus for transmitting broadcast signals may encode service data (S25010).
- the apparatus for transmitting broadcast signals may encode signaling data (S25020).
- the signaling data may include a type of an IP packet, a length of an IP packet, an MTU size of an IP packet, and header compression of an IP packet.
- Information indicating whether or not to perform may be included.
- the apparatus for transmitting broadcast signals may generate at least one signal frame by mapping service data and signaling data (S25030).
- the apparatus for transmitting broadcast signals may modulate the generated at least one signal frame by the OFDM scheme (S25040).
- the apparatus for transmitting broadcast signals may transmit at least one broadcast signal modulated by the OFDM scheme. (S25050)
- 26 is a flowchart of a broadcast signal receiving method according to an embodiment of the present invention.
- FIG. 26 corresponds to a reverse process of the broadcast signal transmission method described with reference to FIG. 25.
- the broadcast signal receiving apparatus may receive at least one broadcast signal (S26000).
- the broadcast signal receiving apparatus may demodulate at least one or more broadcast signals received by the OFDM scheme (S26010).
- the apparatus for receiving broadcast signals may separate at least one signal frame from the demodulated broadcast signal by the OFDM scheme.
- the broadcast signal receiving apparatus may decode signaling data included in the separated signal frame.
- the signaling data may include information indicating the type of the IP packet, the length of the IP packet, the MTU size of the IP packet, whether to perform header compression of the IP packet, and the like.
- the apparatus for receiving broadcast signals may decode service data included in a separated signal frame. (S26040)
- the broadcast signal receiving apparatus may output decoded service data.
- the broadcast signal receiving apparatus may perform a reverse process of various compression / signal processing processes applied to increase transmission efficiency.
- the broadcast signal receiving apparatus when the decoded service data includes the merged IP packet to which the IP packet header compression according to the above-described embodiment is applied, the broadcast signal receiving apparatus performs a header decompression to perform a plurality of merged IP packet headers. Can generate fragmented IP packet headers.
- the merged IP packet payload may be divided into a plurality of fragmented IP packet payloads based on the information and signaling information included in the generated fragmented IP packet header.
- the broadcast signal receiving apparatus may output a plurality of fragmented IP packets.
- the plurality of fragmented IP packets may each include a fragmented IP packet header and a fragmented IP packet payload corresponding to the information included in the fragmented IP packet header.
- the generated size of the fragmented IP packet may be smaller than 1500 bytes, which is an MTU size of an IP packet that can be transmitted in an Ethernet network.
- Apparatus and method according to the present invention is not limited to the configuration and method of the embodiments described as described above, the above-described embodiments may be selectively all or part of each embodiment so that various modifications can be made It may be configured in combination.
- the broadcast signal transmission / reception method of the present invention may be embodied as a processor-readable code on a processor-readable recording medium provided in a network device.
- the processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet. .
- the processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.
- the present invention has industrial applicability in a series of industries related to a broadcast signal transmission method, a broadcast signal reception method, a broadcast signal transmission device, and a broadcast signal reception device.
Abstract
Description
Claims (24)
- 적어도 하나 이상의 입력 스트림(stream)들을 처리하여 적어도 하나 이상의 데이터 파이프(Data pipe)로 출력하는 인풋 포맷팅(input formatting) 단계로서,상기 데이터 파이프는 적어도 하나 이상의 서비스 또는 서비스 컴포넌트(component)를 전송하며,상기 입력 스트림들은 적어도 하나 이상의 IP 패킷(packet)을 포함하고, 상기 적어도 하나 이상의 IP 패킷은 IP 패킷 헤더(header)와 IP 패킷 페이로드(payload)를 포함하며,상기 IP 패킷 헤더에 포함된 정보를 기반으로 상기 적어도 하나 이상의 IP 패킷이 프래그멘티드(fragmented) IP 패킷인 경우, IP 패킷 헤더 압축을 수행하는 단계를 포함하고;상기 데이터 파이프의 서비스 데이터를 인코딩하는 단계;시그널링 데이터를 인코딩하는 단계로서,상기 시그널링 데이터는 상기 데이터 파이프를 통해 전송되는 상기 하나 이상의 서비스 데이터를 시그널링하는 정보를 포함하며;상기 인코딩된 서비스 데이터 및 상기 인코딩된 시그널링 데이터를 매핑하여 적어도 하나 이상의 신호 프레임을 생성하는 단계;상기 생성된 적어도 하나 이상의 신호 프레임을 OFDM (Orthogonal Frequency Division Multiplexing) 방식으로 변조하는 단계; 및상기 변조된 적어도 하나 이상의 신호 프레임을 포함하는 방송 신호를 전송하는 단계를 포함하는 방송 신호 송신 방법.
- 제 1 항에 있어서,상기 IP 패킷 헤더 압축을 수행하는 단계는,적어도 둘 이상의 프래그멘티드 IP 패킷들을 추출하는 단계;상기 추출된 프래그멘티드 IP 패킷들에 포함된 IP 패킷 페이로드들을 병합하여 병합 IP 패킷 페이로드를 생성하고, 상기 생성된 병합 IP 패킷 페이로드를 포함하는 병합 IP 패킷을 생성하는 단계; 및상기 병합 IP 패킷은 상기 추출된 프래그멘티드 IP 패킷들에 포함된 각 IP 패킷 헤더들을 기반으로 생성된 병합 IP 패킷 헤더를 더 포함하는 방송 신호 송신 방법.
- 제 1 항에 있어서,상기 IP 패킷 헤더들은 각각 IP(Internet Protocol) 헤더, UDP(User Datagram Protocol) 헤더, RTP(Real Time Protocol) 헤더 중 적어도 하나 이상을 포함하는 방송 신호 송신 방법.
- 제 2 항에 있어서,상기 병합 IP 패킷 페이로드의 크기는 상기 추출된 각 프래그멘티드 IP 패킷들의 페이로드의 크기보다 크고, 상기 추출된 각 프래그멘티드 IP 패킷들의 크기는 IP 패킷의 최대 전송 단위(MTU : Maximum Transmission Unit) 보다 작거나 같은 방송 신호 송신 방법.
- 제 1 항에 있어서,상기 시그널링 데이터는 상기 서비스 데이터가 포함하는 상기 적어도 하나 이상의 IP 패킷에 대한 정보를 포함하는 방송 신호 송신 방법.
- 제 1 항에 있어서,상기 시그널링 데이터는 상기 IP 패킷 헤더 압축을 수행하는 단계의 포함 여부를 지시하는 정보를 포함하는 방송 신호 송신 방법.
- 적어도 하나 이상의 방송 신호를 수신하는 단계;상기 수신한 적어도 하나 이상의 방송 신호를 OFDM (Orthogonal Frequency Division Multiplexing) 방식으로 복조하는 단계;상기 신호 프레임에 포함된 시그널링 데이터를 디코딩하는 단계로서,상기 시그널링 데이터는 데이터 파이프를 통해 전송되는 상기 신호 프레임에 포함된 서비스 데이터를 시그널링하는 정보를 포함하며;상기 복조된 적어도 하나 이상의 방송 신호로부터 적어도 하나 이상의 신호 프레임을 획득하는 단계로서, 상기 데이터 파이프는 적어도 하나 이상의 서비스 또는 서비스 컴포넌트를 전송하며;상기 데이터 파이프의 서비스 데이터를 디코딩하는 단계; 및상기 디코딩된 서비스 데이터를 출력하는 단계로서,상기 서비스 데이터가 병합 IP 패킷을 포함하는 경우,상기 병합 IP 패킷을 분할하는 IP 패킷 분할 단계를 포함하고;상기 병합 IP 패킷은 병합 IP 패킷 헤더와 병합 IP 패킷 페이로드를 포함하며, 상기 병합 IP 패킷 페이로드는 적어도 둘 이상의 IP 패킷의 IP 패킷 페이로드들을 포함하는 방송 신호 수신 방법.
- 제 7 항에 있어서,상기 IP 패킷 분할 단계는,상기 병합 IP 패킷 헤더가 포함하는 정보와 상기 시그널링 데이터가 포함하는 정보를 기반으로 병합 IP 패킷을 적어도 둘 이상의 IP 패킷들로 분할하는 단계로서,상기 적어도 둘 이상의 IP 패킷들은 각각 IP 패킷 헤더와 IP 패킷 페이로드를 포함하며,상기 IP 패킷 헤더는 상기 병합 IP 패킷 헤더가 포함하는 정보와 상기 분할된 각 IP 패킷 페이로드의 정보를 기반으로 생성되는 방송 신호 수신 방법.
- 제 7 항에 있어서,상기 병합 IP 패킷 헤더는 IP(Internet Protocol) 헤더, UDP(User Datagram Protocol) 헤더, RTP(Real Time Protocol) 헤더 중 적어도 하나 이상을 포함하는 방송 신호 수신 방법.
- 제 8 항에 있어서,상기 분할된 둘 이상의 IP 패킷들의 크기는 IP 패킷의 최대 전송 단위(MTU)의 크기보다 작거나 같은 방송 신호 수신 방법.
- 제 7 항에 있어서,상기 시그널링 데이터는 상기 서비스 데이터가 포함하는 상기 적어도 하나 이상의 IP 패킷에 대한 정보를 포함하는 방송 신호 수신 방법.
- 제 7 항에 있어서,상기 시그널링 데이터는 상기 서비스 데이터가 상기 병합 IP 패킷 포함하는지 여부를 지시하는 정보를 포함하는 방송 신호 수신 방법.
- 적어도 하나 이상의 입력 스트림들을 처리하여 적어도 하나 이상의 데이터 파이프로 출력하는 인풋 포매터로서,상기 데이터 파이프는 적어도 하나 이상의 서비스 또는 서비스 컴포넌트를 전송하며,상기 입력 스트림(stream)들은 적어도 하나 이상의 IP 패킷(packet)을 포함하고, 상기 적어도 하나 이상의 IP 패킷 은 IP 패킷 헤더(header)와 IP 패킷 페이로드(payload)를 포함하며,상기 IP 패킷 헤더에 포함된 정보를 기반으로 상기 적어도 하나 이상의 IP 패킷이 프래그멘티드(fragmented) IP 패킷인 경우, IP 패킷 헤더 압축을 수행하고;상기 데이터 파이프의 서비스 데이터를 인코딩하는 인코더;시그널링 데이터를 인코딩하는 인코더로서,상기 시그널링 데이터는 상기 데이터 파이프를 통해 전송되는 상기 하나 이상의 서비스 데이터를 시그널링하는 정보를 포함하며;상기 인코딩된 서비스 데이터 및 상기 인코딩된 시그널링 데이터를 매핑하여 적어도 하나 이상의 신호 프레임을 생성하는 프레임 빌더;상기 생성된 적어도 하나 이상의 신호 프레임을 OFDM (Orthogonal Frequency Division Multiplexing) 방식으로 변조하는 변조부; 및상기 변조된 적어도 하나 이상의 신호 프레임을 포함하는 방송 신호를 전송하는 전송부를 포함하는 방송 신호 송신 장치.
- 제 13 항에 있어서,상기 IP 패킷 헤더 압축 수행은,적어도 둘 이상의 프래그멘티드 IP 패킷들을 추출하고,상기 추출된 프래그멘티드 IP 패킷들에 포함된 IP 패킷 페이로드들을 병합하여 병합 IP 패킷 페이로드를 생성하고, 상기 생성된 병합 IP 패킷 페이로드를 포함하는 병합 IP 패킷을 생성하며,상기 병합 IP 패킷은 상기 추출된 프래그멘티드 IP 패킷들에 포함된 각 IP 패킷 헤더들을 기반으로 생성된 병합 IP 패킷 헤더를 더 포함하는 방송 신호 송신 장치.
- 제 13 항에 있어서,상기 IP 패킷 헤더들은 각각 IP(Internet Protocol) 헤더, UDP(User Datagram Protocol) 헤더, RTP(Real Time Protocol) 헤더 중 적어도 하나 이상을 포함하는 방송 신호 송신 장치.
- 제 14 항에 있어서,상기 병합된 IP 패킷 페이로드의 크기는 상기 추출된 프래그멘티드 IP 패킷들의 페이로드의 크기보다 크고, 상기 추출된 각 프래그멘티드 IP 패킷들은 IP 패킷의 최대 전송 단위(MTU)보다 작거나 같은 방송 신호 송신 장치.
- 제 13 항에 있어서,상기 시그널링 데이터는 상기 서비스 데이터가 포함하는 적어도 하나 이상의 IP 패킷에 대한 정보를 포함하는 방송 신호 송신 장치.
- 제 13 항에 있어서,상기 시그널링 데이터는 상기 IP 패킷 헤더 압축을 수행하는 단계의 포함 여부를 지시하는 정보를 포함하는 방송 신호 송신 장치.
- 적어도 하나 이상의 방송 신호를 수신하는 수신부;상기 수신한 적어도 하나 이상의 방송 신호를 OFDM (Orthogonal Frequency Division Multiplexing) 방식으로 복조하는 복조부;상기 신호 프레임에 포함된 시그널링 데이터를 디코딩하는 디코더로서,상기 시그널링 데이터는 데이터 파이프를 통해 전송되는 상기 신호 프레임에 포함된 서비스 데이터를 시그널링하는 정보를 포함하며;상기 복조된 적어도 하나 이상의 방송 신호로부터 적어도 하나 이상의 신호 프레임을 획득하는 프레임 파서로서, 상기 데이터 파이프는 적어도 하나 이상의 서비스 또는 서비스 컴포넌트를 전송하며;상기 데이터 파이프의 서비스 데이터를 디코딩하는 디코더; 및상기 디코딩된 서비스 데이터를 출력하는 단계로서,상기 서비스 데이터가 병합 IP 패킷을 포함하는 경우,상기 병합 IP 패킷을 분할하는 IP 패킷 분할하고;상기 병합 IP 패킷은 병합 IP 패킷 헤더와 병합 IP 패킷 페이로드를 포함하며, 상기 병합 IP 패킷 페이로드는 적어도 둘 이상의 IP 패킷의 IP 패킷 페이로드들을 포함하는 방송 신호 수신 장치.
- 제 19 항에 있어서,상기 IP 패킷 분할은,상기 병합 IP 패킷 헤더가 포함하는 정보와 상기 시그널링 데이터가 포함하는 정보를 기반으로 병합 IP 패킷을 적어도 둘 이상의 IP 패킷들로 분할하고,상기 적어도 둘 이상의 IP 패킷들은 각각 IP 패킷 헤더와 IP 패킷 페이로드를 포함하며,상기 IP 패킷 헤더는 상기 병합 IP 패킷 헤더가 포함하는 정보와 상기 분할된 각 IP 패킷 페이로드의 정보를 기반으로 생성되는 방송 신호 수신 장치.
- 제 19 항에 있어서,상기 병합 IP 패킷 헤더는 IP(Internet Protocol) 헤더, UDP(User Datagram Protocol) 헤더, RTP(Real Time Protocol) 헤더 중 적어도 하나 이상을 포함하는 방송 신호 수신 장치.
- 제 19 항에 있어서,상기 분할된 둘 이상의 IP 패킷들의 크기는IP 패킷의 최대 전송 단위(MTU)의 크기보다 작거나 같은 방송 신호 수신 장치.
- 제 19 항에 있어서,상기 시그널링 데이터는 상기 서비스 데이터가 포함하는 상기 적어도 하나 이상의 IP 패킷에 대한 정보를 포함하는 방송 신호 수신 장치.
- 제 19 항에 있어서,상기 시그널링 데이터는 상기 서비스 데이터가 상기 병합 IP 패킷을 포함하는지 여부를 지시하는 정보를 포함하는 방송 신호 수신 장치.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020157036830A KR101698859B1 (ko) | 2013-07-11 | 2014-07-11 | 방송신호 송신방법, 방송신호 수신방법, 방송신호 송신장치, 방송신호 수신장치 |
US14/903,039 US20160218902A1 (en) | 2013-07-11 | 2014-07-11 | Method for transmitting broadcasting signal, method for receiving broadcasting signal, apparatus for transmitting broadcasting signal, and apparatus for receiving broadcasting signal |
CN201480039483.4A CN105379259A (zh) | 2013-07-11 | 2014-07-11 | 发送广播信号的方法、接收广播信号的方法、发送广播信号的设备以及接收广播信号的设备 |
KR1020177001098A KR20170010071A (ko) | 2013-07-11 | 2014-07-11 | 방송신호 송신방법, 방송신호 수신방법, 방송신호 송신장치, 방송신호 수신장치 |
EP14822129.4A EP3021574A4 (en) | 2013-07-11 | 2014-07-11 | Method for transmitting broadcasting signal, method for receiving broadcasting signal, apparatus for transmitting broadcasting signal, and apparatus for receiving broadcasting signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361844883P | 2013-07-11 | 2013-07-11 | |
US61/844,883 | 2013-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015005715A1 true WO2015005715A1 (ko) | 2015-01-15 |
Family
ID=52280304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2014/006242 WO2015005715A1 (ko) | 2013-07-11 | 2014-07-11 | 방송신호 송신방법, 방송신호 수신방법, 방송신호 송신장치, 방송신호 수신장치 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20160218902A1 (ko) |
EP (1) | EP3021574A4 (ko) |
KR (2) | KR20170010071A (ko) |
CN (1) | CN105379259A (ko) |
WO (1) | WO2015005715A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016144031A1 (ko) * | 2015-03-11 | 2016-09-15 | 엘지전자 주식회사 | 방송 신호 송신 장치, 방송 신호 수신 장치, 방송 신호 송신 방법, 및 방송 신호 수신 방법 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3035673A4 (en) | 2013-08-13 | 2017-03-29 | LG Electronics Inc. | Method for transmitting broadcast signal, method for receiving broadcast signal, apparatus for transmitting broadcast signal, and apparatus for receiving broadcast signal |
US9917882B2 (en) | 2014-11-30 | 2018-03-13 | Sonicwall Inc. | Transparent deferred spooling store and forward based on standard network system and client interface |
US10313486B2 (en) * | 2015-01-07 | 2019-06-04 | Sonicwall Inc. | Optimizing transfer of fragmented packetized data |
KR102553322B1 (ko) * | 2015-04-20 | 2023-07-10 | 한국전자통신연구원 | 레이어드 디비전 멀티플렉싱을 이용한 방송 신호 프레임 생성 장치 및 방송 신호 프레임 생성 방법 |
US9813526B2 (en) | 2015-05-26 | 2017-11-07 | Sonicwall Inc. | Reducing transmission pathway lengths within a distributed network |
US10158735B2 (en) | 2015-08-07 | 2018-12-18 | Sonicwall Inc. | Read-ahead on signed connections with unsigning, inline, transparent proxies |
US10334086B2 (en) * | 2015-10-29 | 2019-06-25 | Oracle International Corporation | Header redundancy removal for tunneled media traffic |
KR102519917B1 (ko) * | 2017-11-09 | 2023-04-10 | 엘지전자 주식회사 | 방송 송신 장치, 방송 송신 방법, 방송 수신 장치 및 방송 수신 방법 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20090013992A (ko) * | 2007-08-03 | 2009-02-06 | 삼성전자주식회사 | 방송망을 통하여 전송되는 ip 패킷의 압축 및 복원 방법 |
US20100050057A1 (en) * | 2004-09-16 | 2010-02-25 | Qualcomm Incorporated | Fec architecture for streaming services including symbol based operations and packet tagging |
KR20120123104A (ko) * | 2010-02-26 | 2012-11-07 | 파나소닉 주식회사 | 트랜스포트 스트림 패킷 헤더 압축 |
US20120327879A1 (en) * | 2010-02-25 | 2012-12-27 | Sony Corporation | Transmission apparatus and method for transmission of data in a multi-carrier broadcast system |
KR20130068789A (ko) * | 2011-12-16 | 2013-06-26 | 한국전자통신연구원 | 방송 채널 결합 장치 및 방법 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001230795A (ja) * | 2000-02-16 | 2001-08-24 | Sony Corp | 無線伝送方法および無線伝送装置 |
AU2002311569A1 (en) * | 2002-05-03 | 2003-11-17 | Nokia Corporation | Method and circuitry for processing data |
KR100926707B1 (ko) * | 2002-11-05 | 2009-11-17 | 엘지전자 주식회사 | 이동통신 시스템의 데이터 통신방법 |
KR101733506B1 (ko) * | 2009-01-23 | 2017-05-10 | 엘지전자 주식회사 | 신호 송수신 장치 및 방법 |
CN102100067B (zh) * | 2009-02-13 | 2013-04-24 | Lg电子株式会社 | 用于发送和接收信号的装置以及用于发送和接收信号的方法 |
WO2010101328A1 (en) * | 2009-03-03 | 2010-09-10 | Lg Electronics Inc. | Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal |
-
2014
- 2014-07-11 CN CN201480039483.4A patent/CN105379259A/zh active Pending
- 2014-07-11 KR KR1020177001098A patent/KR20170010071A/ko not_active Application Discontinuation
- 2014-07-11 EP EP14822129.4A patent/EP3021574A4/en not_active Withdrawn
- 2014-07-11 WO PCT/KR2014/006242 patent/WO2015005715A1/ko active Application Filing
- 2014-07-11 KR KR1020157036830A patent/KR101698859B1/ko active IP Right Grant
- 2014-07-11 US US14/903,039 patent/US20160218902A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100050057A1 (en) * | 2004-09-16 | 2010-02-25 | Qualcomm Incorporated | Fec architecture for streaming services including symbol based operations and packet tagging |
KR20090013992A (ko) * | 2007-08-03 | 2009-02-06 | 삼성전자주식회사 | 방송망을 통하여 전송되는 ip 패킷의 압축 및 복원 방법 |
US20120327879A1 (en) * | 2010-02-25 | 2012-12-27 | Sony Corporation | Transmission apparatus and method for transmission of data in a multi-carrier broadcast system |
KR20120123104A (ko) * | 2010-02-26 | 2012-11-07 | 파나소닉 주식회사 | 트랜스포트 스트림 패킷 헤더 압축 |
KR20130068789A (ko) * | 2011-12-16 | 2013-06-26 | 한국전자통신연구원 | 방송 채널 결합 장치 및 방법 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3021574A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016144031A1 (ko) * | 2015-03-11 | 2016-09-15 | 엘지전자 주식회사 | 방송 신호 송신 장치, 방송 신호 수신 장치, 방송 신호 송신 방법, 및 방송 신호 수신 방법 |
US10728590B2 (en) | 2015-03-11 | 2020-07-28 | Lg Electronics Inc. | Apparatus and method for transmitting and receiving broadcast signal |
US10856021B2 (en) | 2015-03-11 | 2020-12-01 | Lg Electronics Inc. | Broadcast signal transmission apparatus, broadcast signal reception apparatus, broadcast signal transmission method, and broadcast signal reception method |
US11297360B2 (en) | 2015-03-11 | 2022-04-05 | Lg Electronics Inc. | Apparatus and method for transmitting and receiving broadcast signal |
Also Published As
Publication number | Publication date |
---|---|
US20160218902A1 (en) | 2016-07-28 |
KR101698859B1 (ko) | 2017-01-23 |
CN105379259A (zh) | 2016-03-02 |
KR20160026910A (ko) | 2016-03-09 |
EP3021574A4 (en) | 2017-03-15 |
EP3021574A1 (en) | 2016-05-18 |
KR20170010071A (ko) | 2017-01-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014185729A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014112797A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015005715A1 (ko) | 방송신호 송신방법, 방송신호 수신방법, 방송신호 송신장치, 방송신호 수신장치 | |
WO2015005604A1 (ko) | 방송신호 전송방법, 방송신호 수신방법, 방송신호 전송장치, 방송신호 수신장치 | |
WO2014112796A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014112806A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015026177A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015008995A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014204181A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014182038A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015023098A1 (ko) | 방송 신호 송신 장치, 방송 신호 수신 방법, 방송 신호 송신 방법 및 방송 신호 수신 방법 | |
WO2015023150A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015016528A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015020442A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014148785A1 (ko) | 방송신호 전송방법, 방송신호 수신방법, 방송신호 전송장치, 방송신호 수신장치 | |
WO2015002449A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015034298A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015002415A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014193160A1 (ko) | 방송 신호 송신 장치, 방송 신호 수신 방법, 방송 신호 송신 방법 및 방송 신호 수신 방법 | |
WO2014171673A9 (ko) | 방송 신호 송신 장치, 방송 신호 수신 장치, 방송 신호 송신 방법 및 방송 신호 수신 방법 | |
WO2015023149A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2014185724A1 (ko) | 방송 신호 송신 장치, 방송 신호 수신 장치, 방송 신호 송신 방법 및 방송 신호 수신 방법 | |
WO2011096759A2 (ko) | 방송 신호 송신 장치, 방송 신호 수신 장치, 및 방송 신호 송/수신 장치에서 방송 신호 송수신 방법 | |
WO2015020476A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
WO2015023148A1 (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14822129 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20157036830 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14903039 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014822129 Country of ref document: EP |