WO2021054179A1 - Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception - Google Patents

Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception Download PDF

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Publication number
WO2021054179A1
WO2021054179A1 PCT/JP2020/033791 JP2020033791W WO2021054179A1 WO 2021054179 A1 WO2021054179 A1 WO 2021054179A1 JP 2020033791 W JP2020033791 W JP 2020033791W WO 2021054179 A1 WO2021054179 A1 WO 2021054179A1
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fec block
ofdm frame
ofdm
transmission
information
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PCT/JP2020/033791
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English (en)
Japanese (ja)
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高橋　和幸
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ソニー株式会社
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Publication of WO2021054179A1 publication Critical patent/WO2021054179A1/fr

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    • 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
    • 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

Definitions

  • the present technology relates to a transmitting device, a transmitting method, a receiving device, and a receiving method, and particularly, for example, a FEC (Forward Error Correction) block obtained by error correction coding included in an OFDM frame (Orthogonal Frequency Division Multiplex).
  • FEC Forward Error Correction
  • a transmitting device, a transmitting method, a receiving device, and a receiving method so that they can be easily obtained.
  • Japan it is being considered to switch the broadcasting system of terrestrial broadcasting from the existing broadcasting system ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) to the next-generation broadcasting system (new system). ..
  • ISDB-T Integrated Services Digital Broadcasting-Terrestrial
  • new system new system
  • a 204-byte FEC block in which 16-byte parity is added to a 188-byte TS (Transport Stream) packet is composed of 204 OFDM symbols. It is transmitted in frames. Therefore, there is no OFDM frame straddle in which the FEC block is arranged so as to straddle the two OFDM frames.
  • the FEC block of the new method obtained by error correction coding may be transmitted in the OFDM frame of the ISDB-T method.
  • the size of the new FEC block will match the size of the existing ISDB-T FEC block, so the new FEC block will be transmitted in ISDB-T OFDM frames.
  • OFDM frame straddling may occur.
  • the FEC block may not be started from the beginning of the OFDM frame, and it may be difficult for the receiving device that receives the OFDM frame to acquire (extract) the FEC block from the OFDM frame.
  • This technology was made in view of such a situation, and makes it possible to easily acquire the FEC block included in the OFDM frame.
  • the transmitter of the present technology is a component that constitutes the OFDM frame including the FEC block pointer that represents the position of the FEC (Forward Error Correction) block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame. It is a transmission device provided with.
  • the transmission method of the present technology is a transmission method including configuring the OFDM frame including the FEC block pointer representing the position of the FEC block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame. ..
  • the OFDM frame including the FEC block pointer representing the position of the FEC block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame is configured.
  • the receiving device of the present technology is the FEC block from the OFDM frame including the FEC block pointer indicating the position of the FEC (Forward Error Correction) block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame.
  • a receiving device including a decoding unit that acquires a pointer and acquires the FEC block according to the FEC block pointer.
  • the receiving method of the present technology is the FEC block from the OFDM frame including the FEC block pointer indicating the position of the FEC (Forward Error Correction) block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame.
  • This is a receiving method including acquiring a pointer and acquiring the FEC block according to the FEC block pointer.
  • the receiving device and receiving method of the present technology from the OFDM frame including the FEC block pointer indicating the position of the FEC (Forward Error Correction) block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame. , The FEC block pointer is acquired, and the FEC block is acquired according to the FEC block pointer.
  • FEC Forward Error Correction
  • the transmitting device and the receiving device may be independent devices or may be internal blocks constituting one device.
  • the transmitting device and the receiving device can be realized by causing a computer to execute a program.
  • a program can be provided by transmitting via a transmission medium or by recording on a recording medium.
  • FIG. 1 is a diagram showing a configuration of an embodiment of a transmission system to which the present technology is applied.
  • the transmission system 1 is a system corresponding to a broadcasting system such as terrestrial digital television broadcasting.
  • the transmission system 1 is composed of data processing devices 11-1 to 11-N (N is an integer of 1 or more) installed in facilities related to each broadcasting station, a transmission device 10 installed in a transmission station, and each user. It is composed of owned receiving devices 20-1 to 20-M (M is an integer of 1 or more).
  • the data processing devices 11-1 to 11-N and the transmission device 10 are connected via communication lines 12-1 to 12-N.
  • the communication lines 12-1 to 12-N can be dedicated lines, for example.
  • the data processing device 11-1 performs necessary processing such as encoding on the data of the broadcast content (for example, a broadcast program) produced by the broadcasting station A, and the transmission data obtained as a result is transmitted via the communication line 12-1. Is transmitted to the transmission device 10.
  • the data processing devices 11-2 to 11-N similarly to the data processing device 11-1, the data of the broadcast content produced by each broadcasting station such as broadcasting station B and broadcasting station Z is processed, and the result is obtained.
  • the transmitted data to be transmitted is transmitted to the transmission device 10 via the communication lines 12-2 to 12-N.
  • the transmission device 10 receives the transmission data transmitted from the data processing devices 11-1 to 11-N on the broadcasting station side via the communication lines 12-1 to 12-N.
  • the transmission device 10 performs necessary processing such as coding and modulation on the transmission data from the data processing devices 11-1 to 11-N, and transmits the resulting broadcast signal to a transmission antenna installed at the transmission station. Send from.
  • the broadcast signal from the transmitting device 10 on the transmitting station side is transmitted to the receiving devices 20-1 to 20-M by radio waves in a predetermined frequency band, respectively.
  • the receiving devices 20-1 to 20-M are configured as fixed receivers such as a television receiver and a set-top box (STB), and are installed at each user's home or the like.
  • fixed receivers such as a television receiver and a set-top box (STB)
  • the receiving device 20-1 receives a broadcast signal transmitted from the transmitting device 10 by radio waves in a predetermined frequency band and performs necessary processing such as demodulation, decoding, and decoding, so that the user can select a channel. Play the corresponding broadcast content (for example, a broadcast program).
  • the broadcast signal from the transmitting device 10 is processed in the same manner as in the receiving device 20-1, and the broadcast content corresponding to the channel selection operation by the user is reproduced.
  • the image of the broadcast content is displayed on the display, and the sound synchronized with the image is output from the speaker, so that the user can view the broadcast content such as a broadcast program. ..
  • the M receivers 20 are a mixture of those compatible with the existing broadcasting system (existing system) and those compatible with the new broadcasting system (new system). Therefore, in the following description, the receiving device 20 corresponding to the existing method is referred to as the existing method receiving device 20L, and the receiving device 20 corresponding to the new method is referred to as the new method receiving device 20N.
  • the receiving device 20 is referred to as a dual receiving device 20D in the following description. However, when it is not necessary to distinguish between the existing type receiving device 20L, the new type receiving device 20N, and the both type receiving device 20D, it is simply referred to as the receiving device 20.
  • the ISDB-T method and the new method that is an advanced version of ISDB-T both transmit OFDM frames by layered transmission, which is simultaneous transmission of OFDM segment groups with different transmission line coding.
  • the ISDB-T method and the new method that is an advanced version of ISDB-T are broadcast systems. It can be said that some are common.
  • ISDB-T system broadcasting can be performed on a certain layer of the same channel (frequency band), and new system broadcasting can be performed on another layer. Therefore, ISDB-T system broadcasting can be performed. It is possible to carry out a new type of broadcasting while maintaining the broadcasting.
  • the new method is compatible with the ISDB-T method, as described above, that the new method can broadcast using some layers of the ISDB-T method capable of performing hierarchical transmission. Means. Therefore, broadcasting of a new system compatible with the ISDB-T system can be performed while maintaining the broadcasting of the ISDB-T system.
  • the new method receiving device 20N and the both type receiving device 20D When introducing the new method, if the new method is properly introduced, the new method receiving device 20N and the both type receiving device 20D will be newly introduced without affecting the operation of the existing method receiving device 20L. It is required to be able to appropriately receive and process the broadcast signal of the system.
  • the transmission control signal has control information corresponding to the introduction of a new method (second method) compatible with the existing method (first method), that is, introduction of the new method.
  • the receiving device 20 processes the transmission control signal including the segment control information including the control information related to the segment which is the division unit in the frequency domain (hereinafter, also referred to as the segment control information). By doing so, it is possible to more appropriately introduce the new method.
  • segment control information is assigned to control information that assists the operation of a receiving device that receives an OFDM frame, specifically, undefined bits in TMCC information transmitted by a TMCC signal. This makes it possible for the new type receiving device 20N and the both type receiving device 20D to appropriately receive and process the new type broadcasting signal.
  • OFDM orthogonal frequency division multiplexing
  • one channel (frequency band) is divided into 13 segments, but here, one channel can be configured by a maximum of three layers.
  • the three layers can be, for example, an A layer composed of one segment, a B layer composed of six segments, and a C layer composed of six segments.
  • the number of segments in each layer can be arbitrarily set within a range in which the total of the segments of the three layers (A layer, B layer, and C layer) does not exceed 13 segments.
  • TMCC Transmission Multiplexing Configuration Control
  • This TMCC signal includes information such as transmission parameters such as the modulation method of each layer and the error correction coding rate.
  • FIG. 2 shows an example of bit allocation of a TMCC carrier (TMCC signal).
  • bit B 0 is a demodulation reference signal for the TMCC symbol
  • bits B 1 to B 16 are synchronization signals
  • bits B 17 to B 19 are used.
  • parity bits are assigned to bits B 122 to B 203.
  • FIG. 3 shows the details of bits B 20 to B 121 of the TMCC information of FIG.
  • bits B 20 to B 121 are system identification, bits B 22 to B 25 are transmission parameter switching indexes, bits B 26 are start control signals, and bits B 27 to B.
  • the current information is assigned to 66, the next information is assigned to bits B 67 to B 106 , the connected transmission phase correction amount is assigned to bits B 107 to B 109 , and bits B 110 to B 121 are undefined.
  • FIG. 4 shows an example of the configuration of the transmission parameter information of each layer of the current information and the next information in the TMCC information of FIG. That is, FIG. 4 shows the transmission parameter information of the A layer, the B layer, and the C layer of the current information, and the A layer, the B layer, and the C layer of the next information.
  • This transmission parameter information includes a 3-bit carrier modulation mapping method, a 3-bit convolutional code rate, a 3-bit time interleave length, and a 4-bit number of segments.
  • FIGS. 5 to 8 show specific examples of these transmission parameter information.
  • FIG. 5 shows an example of the carrier modulation mapping method.
  • this carrier modulation mapping method for example, DQPSK (Differential Quadrature Phase Shift Keying) and QPSK (Quadrature Phase Shift Keying) are used according to the 3-bit values of '000', '001', '010', and '011'. ), 16QAM (Quadrature Amplitude Modulation), 64QAM and other modulation methods are specified.
  • DQPSK Downifferential Quadrature Phase Shift Keying
  • QPSK Quadrature Phase Shift Keying
  • 16QAM Quadrature Amplitude Modulation
  • 64QAM Quadrature Amplitude Modulation
  • FIG. 6 shows an example of the convolution code rate.
  • the convolution code rate is 1/2, 2/3, 3 /, for example, depending on the 3-bit values of '000', '001', '010', '011', and '100'. Code rates such as 4, 5/6, 7/8, etc. are specified.
  • FIG. 7 shows an example of the length of the time interleave.
  • the values of I in modes 1 to 3 are set according to the 3-bit values of '000', '001', '010', and '011'.
  • FIG. 8 shows an example of the number of segments.
  • the number of segments for example, the number of segments 1 to 13 is set according to the 4-bit value of '0001' to '1101'.
  • the undefined bits B 110 to B 121 of the TMCC information (Fig. 3) are used for new method introduction control information indicating whether or not a new method is introduced, and segment control indicating the number of segments used in the new method. Information is assigned.
  • the new method receiving device 20N and the both type receiving device 20D it is possible to determine whether or not the new method has been introduced based on the new method introduction control information. Further, in the new type receiving device 20N and the double type receiving device 20D, when it is determined that the new method has been introduced, processing can be performed according to the segment control information.
  • the undefined bits B 110 to B 121 of the TMCC information (FIG. 3) to which the new system introduction control information and the segment control information are assigned are ignored, so that the existing system broadcast signal is used. Can be processed appropriately.
  • FIG. 9 is a diagram illustrating a first introduction method of introducing a new system while maintaining the broadcasting of the ISDB-T system as an existing system.
  • the first introduction method is "Research and Development on Advanced Broadcasting", March 16, 2018, Ministry of Internal Affairs and Communications Information and Distribution Administration Bureau, NHK, Kansai Telecasting Corporation, TBS Television (http://www.soumu.go) This is one of the introduction methods of the new method introduced in .jp / main_content / 000539299.pdf) (hereinafter referred to as Reference 1).
  • a new method using MIMO (Multiple Input Multiple Output) method in which H polarization (horizontal polarization) and V polarization (vertical polarization) are received by a plurality of corresponding antennas, respectively, is used.
  • the method is introduced.
  • one channel having 13 segments is divided into two layers, an A layer composed of one segment and a B layer composed of 12 segments. Then, one-segment broadcasting is performed on the A layer, and so-called 2K broadcasting is performed on the B layer. In 1seg broadcasting and 2K broadcasting, only H polarization is used in the SISO (Single-Input Single-Output) method.
  • SISO Single-Input Single-Output
  • one channel is divided into three layers, for example, an A layer composed of one segment, a B layer composed of five segments, and a C layer composed of seven segments.
  • one-segment broadcasting is performed by H polarization
  • 2K broadcasting is performed by H polarization
  • the B layer as a new type of broadcasting, for example, 4K broadcasting is performed by the MIMO method using H polarization and V polarization.
  • 2K broadcasting is broadcasting of video corresponding to a screen resolution of about 1920 ⁇ 1080 pixels
  • 4K broadcasting is broadcasting of video corresponding to a screen resolution of about 3840 ⁇ 2160 pixels.
  • 8K broadcasting is video broadcasting that supports a screen resolution of approximately 7680 x 4320 pixels.
  • FIG. 10 is a diagram illustrating a second introduction method of introducing a new method while maintaining the broadcasting of the ISDB-T method as an existing method.
  • the second introduction method is one of the introduction methods of the new method introduced in Reference 1 as well as the first introduction method.
  • a in FIG. 10 shows a broadcast signal of a segment when a new method is introduced by using LDM.
  • a new type of 4K broadcasting is performed in the low power layer (LL (Lower_Layer)) where the broadcast signal level is low, and in the high power layer (UL (Upper_Layer)) where the broadcast signal level is high.
  • LL Low Power Layer
  • UL User_Layer
  • IL Injection_Level
  • IL represents the input level of the low power layer based on the maximum level of the high power layer.
  • FIG. 10 shows the relationship between IL and an area (4K service area) where a new system of 4K broadcasting can be received.
  • the signal level of the low power layer will increase and the 4K service area will expand.
  • the new method may require transmission parameters specific to the new method.
  • FIG. 11 is a diagram showing a configuration example of an ISDB-T method OFDM segment.
  • the OFDM segment in Fig. 11 is described in ARIB standard ARIB STD-B31 2.2 version.
  • the horizontal direction represents the carrier number, that is, the frequency
  • the vertical direction represents the OFDM symbol number, that is, the time.
  • Si, j represents a carrier symbol in the data segment after interleaving
  • SP represents a Scattered Pilot
  • TMCC Transmission and Multiplexing Configuration Control
  • AC Advanced Channel
  • the OFDM segment is composed of 204 carriers (subcarriers) of a predetermined number of OFDM symbols (108 in FIG. 11) arranged in the time direction.
  • the OFDM frame consists of 13 OFDM segments arranged in the frequency direction. Therefore, an OFDM frame is composed of 204 OFDM symbols.
  • a 204-byte fixed-length FEC block with 16-byte parity added to an 188-byte TS packet is transmitted by an OFDM frame consisting of 204 OFDM symbols. Therefore, for a 204-byte FEC block, an OFDM frame straddle in which the FEC block is arranged across two OFDM frames does not occur.
  • the size of the FEC block of the new system is the size of the existing ISDB-T system. There is no guarantee that it will match the size of the FEC block in, so when a new FEC block is transmitted in ISDB-T OFDM frames, there may be OFDM frame crossing.
  • FIG. 12 is a diagram showing an example of the relationship between the FEC block and the OFDM frame when the FEC block of the new method is transmitted by the OFDM frame of the ISDB-T method.
  • the new FEC block is assigned to the segments that make up the ISDB-T hierarchy (A layer, B layer, C layer). Be transmitted.
  • the OFDM frame is composed of n + 1 OFDM symbols Symbol # 0, Symbol # 1, ..., Symbol # n, and one OFDM symbol Symbol # i is m + 1. It has carriers (subcarriers) for Seg0, Seg # 1, ..., Seg # m in each segment.
  • n + 1 is 204 and m + 1 is 13.
  • the FEC block of the new method is obtained by applying BCH coding and LDPC coding to the payload information (information arranged on the payload).
  • the new FEC block consists of payload information, BCH code parity (bits), and LDPC code parity.
  • the size of the new FEC block is a divisor of the OFDM frame size (frame length).
  • frame straddling may occur in which the FEC block is arranged straddling two OFDM frames.
  • the FEC block #k straddles two OFDM frames.
  • the FEC block may not be started from the beginning of the OFDM frame, and it becomes difficult to acquire (extract) the FEC block from the OFDM frame in the new type receiving device 20N and the dual type receiving device 20D. Sometimes.
  • the FEC block included in the OFDM frame can be easily acquired by introducing the FEC block pointer indicating the position of the FEC block.
  • TLV Type Length Value
  • ARIB ARIB standard ARIB STD-B32
  • the FEC block When TLV packets and TS packets are used together in the new method, in order for the packets placed in the payload of the FEC block to be processed correctly by the new method receiving device 20N and the both type receiving device 20D, the FEC block
  • the type of packet placed in the payload for example, the type information indicating whether the packet placed in the payload of the FEC block is a TS packet or a TLV packet is required.
  • the FEC block pointer and type information are included in the OFDM frame as transmission parameters peculiar to the new method.
  • FIG. 13 is a diagram showing a configuration example of an ISDB-T system OFDM frame that transmits a new system FEC block.
  • the ISDB-T system OFDM frame that transmits the new system FEC block is called the new system OFDM frame for convenience of explanation.
  • the new method of OFDM frame includes, if necessary, a FEC block pointer indicating the position of the FEC block, for example, the position of the beginning of the FEC block at the beginning of the OFDM frame with reference to the beginning of the OFDM frame. Is done.
  • the OFDM frame of interest can be prevented from including the FEC block pointer.
  • the size of the FEC block pointer (variable as) can be set according to the amount of data that can be included in the OFDM frame.
  • the mode in which the most data can be included in the ISDB-T system OFDM frame is mode 3 with 384 data carriers.
  • the carrier modulation method having the largest number of signal points on the constellation is 4096QAM.
  • the maximum amount of data DMAX that can be included in the new OFDM frame is expressed by the following formula.
  • FIG. 14 is a diagram showing a first example of pointer information.
  • the pointer information is information related to the FEC block pointer.
  • the frequency band composed of 13 segments is divided into an A layer composed of segment 0, a B layer composed of segments 1 to 4, and a C layer composed of segments 5 to 12. There is.
  • One-segment broadcasting is assigned to the A layer
  • the new 4K broadcasting is assigned to the B layer
  • the current ISDB-T 2K broadcasting is assigned to the C layer. The same applies to FIGS. 15 and 16 described later.
  • the pointer information can be placed at the beginning of each data segment of one or more layers in which the new method of broadcasting is performed.
  • the pointer information is arranged at the head of the data segment (segment 1) of the B layer in which the new method of 4K broadcasting is performed. The same applies to FIGS. 15 and 16 described later.
  • the pointer information is composed of 24 bits in order to store a 21-bit FEC block pointer and to make a byte alignment.
  • the first 3 bits are unused areas for future expansion, and the FEC block pointer is placed in the remaining 21 bits.
  • the unused (undefined) area is set to 1, for example, according to the ISDB-T method.
  • the FEC block can be easily obtained from the OFDM frame even if the frame is straddled. ..
  • FIG. 15 is a diagram showing a second example of pointer information.
  • presence / absence information is arranged as essential information in the first bit of the pointer information.
  • the presence / absence information indicates the presence / absence of the FEC block pointer. For example, if the presence / absence information is 1, it means that there is no FEC block pointer, and if the presence / absence information is 0, it means that there is a FEC block pointer.
  • the pointer information is composed of 8 bits in which 1-bit presence / absence information and 7-bit unused area for byte alignment are arranged from the beginning.
  • the pointer information consists of 1-bit presence / absence information, 2 bits of unused area for byte alignment, and 24 bits of 21-bit FEC block pointers arranged from the beginning. To.
  • the pointer information in FIG. 15 is 24 bits when the head of the FEC block exists in the OFDM frame, but is 8 bits when the head of the FEC block does not exist in the OFDM frame.
  • the head of the FEC block does not exist in the OFDM frame, the amount of data in the data segment consumed for transmitting pointer information decreases. Therefore, as compared with FIG. 14, data is transmitted by the decrease.
  • the capacity can be increased.
  • FIG. 16 is a diagram showing a third example of pointer information.
  • the presence / absence information is included in the TMCC information as the control information that assists the operation of the receiving device 20 included in the OFDM frame.
  • bits B110 to B121 are undefined.
  • some of the undefined bits B110 to B121 are assigned presence / absence information for each of the one or more layers.
  • the presence / absence information about the A layer, the B layer, and the C layer is assigned to the bits B110 to B112, respectively.
  • the presence / absence information assigned to the bits B110, B111, and B112 indicates the presence / absence of the FEC block pointers in the A layer, the B layer, and the C layer, respectively. For example, if the presence / absence information is 1, it means that there is no FEC block pointer, and if the presence / absence information is 0, it means that there is a FEC block pointer.
  • the pointer information including the FEC block pointer cannot be included at the beginning of the data segment of the corresponding hierarchy.
  • the pointer information including the FEC block pointer is included at the beginning of the data segment of the corresponding hierarchy.
  • the pointer information is composed of, for example, 24 bits similar to those in FIG.
  • the head of the FEC block does not exist in the OFDM frame, the amount of data in the data segment consumed for transmitting pointer information decreases. Therefore, as compared with FIG. 14, data is transmitted by the decrease.
  • the capacity can be increased.
  • FIG. 17 is a diagram showing a fourth example of pointer information.
  • the pointer information is composed of only the 21-bit FEC block pointer, and is assigned to the additional information transmitted by the AC signal and the control information transmitted by the TMCC signal.
  • ISDB-T system broadcasting is maintained, that is, the existing system receiver 20L performs ISDB-T system 2K broadcasting. It may not be possible to receive normally.
  • pointer information specific to the new system must be assigned to undefined bits of control information transmitted by TMCC signals, that is, bits B110 to B121 of TMCC information. is there.
  • the undefined bits of TMCC information are 12 bits of bits B110 to B121, and the number of bits is insufficient to allocate all the bits of the FEC block pointer as 21-bit pointer information.
  • the first (or end) 12 bits of the FEC block pointer as 21-bit pointer information are assigned to the undefined bits B110 to B121 of the TMCC information, and the FEC block.
  • the remaining 9 bits of the pointer are assigned to the additional information transmitted by the AC signal.
  • the undefined bits of the TMCC information can be assigned less than 12 bits of the FEC block pointer, and the additional information transmitted by the AC signal can be assigned more bits than 9 bits of the FEC block pointer. ..
  • the data segment is used for the transmission of the FEC block pointer. Does not consume. Therefore, the data transmission capacity can be increased as compared with FIGS. 14 to 16.
  • FIG. 18 is a diagram showing an example of type information.
  • the type information indicates the type of the packet placed in the payload of the FEC block, for example, whether the packet placed in the payload of the FEC block is a TS packet or a TLV packet.
  • the type information is included in the TMCC information.
  • bits B110 to B121 are undefined.
  • type information for each of one or more layers is assigned to a part of the undefined bits B110 to B121.
  • the types information about the A layer, the B layer, and the C layer are assigned to the bits B113 to B115, respectively.
  • the type information assigned to the bits B113, B114, and B115 represents the types of packets arranged in the FEC blocks of the A layer, the B layer, and the C layer, respectively. For example, if the type information is 1, it means that the packet placed in the FEC block is a TS packet, and if the type information is 0, it means that the packet placed in the FEC block is a TLV packet. Represent.
  • the transmission parameters of the new method are assigned to the undefined bits B110 to B121 of the TMCC information (FIG. 3), for example, the new method introduction control information and segment control information described in FIG. 8 and the presence / absence described in FIG.
  • the FEC block pointer as the pointer information described in FIG. 17, and the type information described in FIG. 18, the transmission parameters of the new method are assigned to the undefined bits B110 to B121 so as not to overlap each other. There is a need.
  • the new method When assigning the transmission parameters of the new method to the undefined bits B110 to B121 of the TMCC information, when the undefined bits B110 to B121 are not sufficient, for example, the new method is used for the additional information transmitted by the AC signal. Transmission parameters can be assigned. Also, for example, the pointer information is not assigned to the undefined bits B110 to B121 of the TMCC information, but is placed in the data segment, so that the undefined bits B110 to B121 to which the transmission parameter of the new method is assigned is insufficient. And the new transmission parameters can be assigned to undefined bits B110 to B121 so that they do not overlap with each other.
  • FIG. 19 is a block diagram showing a configuration example of the transmission device 10 of FIG.
  • the transmission device 10 is a transmission device capable of performing both ISDB-T type broadcasting and new type broadcasting, and has an upper layer processing unit 111 and a physical layer processing unit 112. .. In the following, the processing performed by the transmission device 10 for broadcasting the current ISDB-T system will be omitted as appropriate, and the processing for broadcasting the new system will be described. The same applies to the receiving device 20.
  • the video and audio of the program content are supplied to the upper layer processing unit 111.
  • the upper layer processing unit 111 is a data link layer, a network layer, a transport layer, a session layer, and a presentation layer of an upper layer (OSI (Open Systems Interconnection) reference model) higher than the physical layer from the video and audio of the program content. , Application layer), performs processing of the upper layer that generates upper layer data in the format specified by, and supplies the data to the physical layer processing unit 112.
  • OSI Open Systems Interconnection
  • the upper layer processing unit 111 encodes the video and audio of the program content as the processing of the upper layer, generates the upper layer data including the encoded video and audio, and performs the physical layer. It is supplied to the processing unit 112.
  • TS packets and TLV packets can be adopted as the upper layer data.
  • the physical layer processing unit 112 performs physical layer processing on the upper layer data from the upper layer processing unit 111, and transmits, for example, an OFDM signal as the transmission data obtained as a result.
  • the physical layer processing unit 112 includes a transmission line coding unit 121, a generation unit 122, a frame configuration unit 123, an IFFT (Inverse Fast Fourier Transform) unit 124, a GI (Guard Interval) addition unit 125, and a transmission unit 126.
  • IFFT Inverse Fast Fourier Transform
  • GI Guard Interval
  • Upper layer data is supplied to the transmission line coding unit 121 from the upper layer processing unit 111.
  • the transmission line coding unit 121 applies predetermined transmission line coding to the upper layer data from the upper layer processing unit 111, and forms (the data carrier) of the FEC block obtained by the transmission line coding into the frame constituent unit 123. Supply to.
  • the transmission path coding for example, the data carrier according to the FEC block obtained by layering the upper layer data, error correction coding such as BCH coding or LDPC coding of the upper layer data, and error correction coding. Mapping as modulation (mapping on (IQ) constellation), time interleaving, frequency interleaving, etc. are performed.
  • the generation unit 122 generates the pilot signal (SP), TMCC signal, AC signal, and pointer information (carrier), which are physical layer data (physical layer data), and supplies them to the frame configuration unit 123.
  • SP pilot signal
  • TMCC signal TMCC signal
  • AC signal AC signal
  • pointer information carrier
  • the TMCC signal generated by the generation unit 122 can include new method introduction control information, segment control information, and type information. Further, the TMCC signal can include presence / absence information or pointer information as described with reference to FIG. 16 or FIG. However, here, as described with reference to FIG. 14 or 15, the pointer information is included at the beginning of the data segment of the required hierarchy.
  • the frame configuration unit 123 constitutes an OFDM frame including a FEC block from the transmission line coding unit 121, a pilot signal (SP), a TMCC signal, an AC signal, and pointer information from the generation unit 122, and is an IFFT unit. Supply to 124.
  • the IFFT unit 124 performs IFMT as a signal in the frequency domain of the OFDM frame supplied from the frame configuration unit 123, converts it into an OFDM frame in the time domain, and supplies it to the GI addition unit 125.
  • the GI addition unit 125 adds an GI having a length that is an integral fraction of the symbol length of the OFDM symbol to each OFDM symbol constituting the OFDM frame in the time domain from the IFFT unit 124, and adds an OFDM signal as transmission data. Is configured and supplied to the transmission unit 126.
  • the transmission unit 126 performs frequency conversion of the transmission data from the GI addition unit 125, and transmits an OFDM signal as the transmission data after the frequency conversion.
  • FIG. 20 is a flowchart illustrating an example of transmission processing performed by the transmission device 10 of FIG.
  • an OFDM signal as transmission data is generated and transmitted.
  • step S11 the upper layer processing unit 111 generates upper layer data and supplies it to the physical layer processing unit 112, and the processing proceeds to step S12.
  • step S12 the generation unit 122 generates the TMCC signal including the pilot signal, the type information, the AC signal, and the pointer information, supplies the pointer information to the frame configuration unit 123, and the process proceeds to step S13.
  • step S13 the physical layer processing unit 112 transmits the upper layer data from the upper layer processing unit 111, the TMCC signal including the pilot signal, the type information, and the like generated by the generation unit 122, the AC signal, and the pointer information.
  • the including OFDM frame is configured, and the process proceeds to step S14.
  • the transmission line coding unit 121 applies transmission line coding to the upper layer data from the upper layer processing unit 111, and frames the FEC block obtained by the transmission line coding. Supply to 123.
  • the frame configuration unit 123 constitutes an FEC block from the transmission line coding unit 121, a TMCC signal including a pilot signal from the generation unit 122, type information, an AC signal, and an OFDM frame including pointer information. It is supplied to the IFFT unit 124.
  • step S14 the physical layer processing unit 112 generates and transmits an OFDM signal as transmission data from the OFDM frame, and the transmission process of the OFDM signal corresponding to the one-frame OFDM frame is completed.
  • the IFFT unit 124 performs IFMT on the OFDM frame from the transmission line coding unit 121, and supplies the OFDM frame in the time domain obtained as a result to the GI addition unit 125.
  • the GI addition unit 125 adds GI to each OFDM symbol constituting the OFDM frame in the time domain from the IFFT unit 124, constitutes an OFDM signal as transmission data, and supplies it to the transmission unit 126.
  • the transmission unit 126 performs frequency conversion of the transmission data from the GI addition unit 125, and transmits an OFDM signal as the transmission data after the frequency conversion.
  • FIG. 21 is a block diagram showing a configuration example of the receiving device 20 of FIG.
  • the receiving device 20 is, for example, a dual-type receiving device 20D capable of receiving both ISDB-T type broadcasting and new type broadcasting, and is a physical layer processing unit 131 and an upper layer. It has a processing unit 132.
  • the new system receiving device 20N receives the new system broadcasting among the processing of receiving the current ISDB-T system broadcasting performed by the dual type receiving device 20D and the processing of receiving the new system broadcasting. Since only the processing is performed, the description thereof will be omitted.
  • the physical layer processing unit 131 receives the OFDM signal as transmission data transmitted from the transmission device 10, and processes the transmission data in the physical layer.
  • the physical layer processing unit 131 includes a receiving unit 141, an ADC (Analog to Digital Converter) 142, an orthogonal demodulation unit 143, an FFT unit 144, an acquisition unit 145, and a transmission line decoding unit 146.
  • ADC Analog to Digital Converter
  • the receiving unit 141 receives the OFDM signal as transmission data of a predetermined channel (frequency band) transmitted from the transmitting device 10 and supplies it to the ADC 142.
  • the ADC 142 performs AD conversion of the OFDM signal as transmission data from the receiving unit 141 and supplies it to the orthogonal demodulation unit 143.
  • the orthogonal demodulation unit 143 performs orthogonal demodulation of the OFDM signal as transmission data from the ADC 142, and supplies the OFDM signal in the time region obtained as a result to the FFT unit 144.
  • the FFT unit 144 performs FFT on the OFDM signal in the time domain from the orthogonal demodulation unit 143, and supplies the OFDM frame in the frequency domain obtained as a result to the acquisition unit 145 and the transmission line decoding unit 146.
  • the acquisition unit 145 acquires the pilot signal (SP), TMCC signal, and AC signal, which are physical layer data, from the OFDM frame from the FFT unit 144, and supplies them to the transmission line decoding unit 146.
  • SP pilot signal
  • TMCC signal TMCC signal
  • AC signal which are physical layer data
  • the acquisition unit 145 acquires the type information included in the TMCC signal and supplies it to the upper layer processing unit 132.
  • the transmission line decoding unit 146 uses the pilot signal, TMCC signal, AC signal, and pointer information supplied from the acquisition unit 145 as necessary to perform predetermined transmission line decoding on the OFDM frame from the FFT unit 144. Then, the TS packet or TLV packet as the upper layer data arranged in the payload of the FEC block included in the OFDM frame is restored and supplied to the upper layer processing unit 52.
  • the TMCC signal includes, for example, information such as a modulation method of a data carrier, and the transmission line decoding can be performed by using the TMCC signal supplied from the acquisition unit 145 to the transmission line decoding unit 146 as necessary. ..
  • the FEC block that is the target of error correction decoding is acquired (extracted) from the OFDM frame.
  • the acquisition of the FEC block from the OFDM frame is performed according to the pointer information arranged at the head of the data segment of the hierarchy and the FEC block pointer included in the pointer information.
  • the FEC block can be easily acquired from the OFDM frame.
  • the upper layer processing unit 132 processes the upper layer data from the transmission line decoding unit 146 of the physical layer processing unit 131.
  • Upper layer data is supplied to the upper layer processing unit 132 from the transmission line decoding unit 146 of the physical layer processing unit 131, and type information is supplied from the acquisition unit 145 of the physical layer processing unit 131.
  • the upper layer processing unit 132 identifies whether the upper layer data is a TS packet or a TLV packet from the transmission path decoding unit 146 according to the type information from the acquisition unit 145, and processes the TS packet or the TLV packet. By doing so, the encoded video and audio are acquired from the TS packet or TLV packet. Then, the upper layer processing unit 132 decodes and outputs the encoded video and audio.
  • the upper layer processing unit 132 can specify whether the upper layer data is a TS packet or a TLV packet from the type information, the upper layer data is processed appropriately for the type of the upper layer data. It can be performed.
  • FIG. 22 is a flowchart illustrating a reception process performed by the reception device 20 of FIG. 21.
  • the OFDM signal as transmission data is received, and the processing of the upper layer for acquiring the video and audio included in the upper layer data included in the OFDM signal is performed.
  • step S31 the receiving unit 141 sets the frequency according to, for example, a user operation, and the process proceeds to step S32.
  • step S32 the physical layer processing unit 131 sets the FFT size of the FFT performed by the FFT unit 144, and information on the GI and the pilot signal (SP), and the process proceeds to step S33.
  • step S33 the physical layer processing unit 131 receives the OFDM signal and demodulates it, and the process proceeds to step S34.
  • step S33 the receiving unit 141 receives the OFDM signal as the transmission data of the channel of the frequency set in step S31, which is transmitted from the transmitting device 10, and supplies it to the ADC 142.
  • the ADC 142 performs AD conversion of the OFDM signal from the receiving unit 141 and supplies it to the orthogonal demodulation unit 143.
  • the orthogonal demodulation unit 143 performs orthogonal demodulation of the OFDM signal from the ADC 142 and supplies it to the FFT unit 144.
  • the FFT unit 144 performs FFT on the OFDM signal from the orthogonal demodulation unit 143 using the FFT size set in step S33 and the information of the GI and the pilot signal (SP), and TMCC included in the OFDM frame. Attempt to acquire (restore) the signal.
  • step S34 the FFT unit 144 determines whether or not the TMCC signal could be acquired.
  • step S34 If it is determined in step S34 that the TMCC signal could not be acquired, the process returns to step S32. Then, in step S32, the FFT size and the GI and pilot signal (SP) information are reset, and the same process is repeated thereafter.
  • SP pilot signal
  • step S34 when it is determined in step S34 that the TMCC signal can be acquired, that is, when the FFT size and the GI and pilot signal information are appropriately set in step S32, the FFT unit 144 , The OFDM frame obtained by the FFT of the OFDM signal is supplied to the acquisition unit 145 and the transmission line decoding unit 146, and the process proceeds to step S35.
  • step S35 the transmission line decoding unit 146 determines whether or not the OFDM frame from the FFT unit 144 is a new type OFDM frame.
  • step S35 the acquisition unit 145 acquires the pilot signal, TMCC signal, and AC signal, which are physical layer data, from the OFDM frame from the FFT unit 144, and supplies them to the transmission line decoding unit 146.
  • step S35 the transmission line decoding unit 146 determines whether the OFDM frame from the FFT unit 144 is the new method OFDM frame according to the new method introduction control information included in the TMCC signal from the acquisition unit 145. To judge.
  • step S35 when it is determined that the OFDM frame from the FFT unit 144 is not the new method OFDM frame, that is, when the OFDM frame from the FFT unit 144 is the current ISDB-T method OFDM frame, the processing is performed. , Step S36.
  • step S36 the transmission line decoding unit 146 sets the transmission parameters of the current ISDB-T method included in the TMCC signal from the acquisition unit 145, and the process proceeds to step S37.
  • step S37 the transmission line decoding unit 146 decodes the transmission path of the OFDM frame from the FFT unit 144 according to the transmission parameters of the current ISDB-T method set in step S36, and outputs the TS packet as the upper layer data. Restore.
  • the transmission line decoding unit 146 supplies the TS packet as the upper layer data to the upper layer processing unit 132, and the processing proceeds from step S37 to step S38.
  • step S38 the upper layer processing unit 132 processes the TS packet as the upper layer data from the transmission line decoding unit 146, and acquires the encoded video and audio from the TS packet. Then, the upper layer processing unit 132 decodes and outputs the encoded video and audio, and completes the reception processing of the OFDM signal corresponding to the one-frame OFDM frame.
  • step S35 if it is determined in step S35 that the OFDM frame from the FFT unit 144 is a new type OFDM frame, the process proceeds to step S41.
  • step S41 the transmission line decoding unit 146 sets the transmission parameter of the new method included in the TMCC signal from the acquisition unit 145, and the process proceeds to step S42.
  • step S42 the transmission line decoding unit 146 decodes the transmission path of the OFDM frame from the FFT unit 144 according to the transmission parameter of the new method set in step S41, and restores the upper layer data.
  • transmission line decoding frequency deinterleaving, time deinterleaving, demapping, error correction decoding, etc. are performed.
  • the transmission line decoding unit 146 acquires the pointer information arranged at the head of the data segment of the layer in which the new method of broadcasting is performed. Then, the transmission line decoding unit 146 acquires an FEC block from the OFDM frame according to the FEC block pointer included in the pointer information, and performs error correction decoding for the FEC block.
  • the OFDM frame is processed as not including the beginning of the FEC block. Will be done.
  • the transmission line decoding unit 146 supplies the upper layer data restored by the transmission line decoding to the upper layer processing unit 52, and the processing proceeds from step S42 to step S43.
  • step S43 the acquisition unit 145 acquires the type information included in the TMCC signal and supplies it to the upper layer processing unit 132, and the process proceeds to step S44.
  • the upper layer processing unit 132 specifies which type of TS packet or TLV packet the upper layer data from the transmission line decoding unit 146 is, according to the type information from the acquisition unit 145. To do. Then, the upper layer processing unit 132 acquires the encoded video and audio from the TS packet or TLV packet as the upper layer data by processing the upper layer data according to the type of the upper layer data. .. Then, the upper layer processing unit 132 decodes and outputs the encoded video and audio, and completes the reception processing of the OFDM signal corresponding to the one-frame OFDM frame.
  • At least a part of the above-mentioned series of processes can be performed by hardware or software.
  • the programs constituting the software are installed on a general-purpose computer or the like.
  • FIG. 23 is a block diagram showing a configuration example of an embodiment of a computer in which a program for executing the above-mentioned series of processes is installed.
  • the program can be recorded in advance on the hard disk 905 or ROM 903 as a recording medium built in the computer.
  • the program can be stored (recorded) in the removable recording medium 911 driven by the drive 909.
  • a removable recording medium 911 can be provided as so-called package software.
  • examples of the removable recording medium 911 include a flexible disc, a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto Optical) disc, a DVD (Digital Versatile Disc), a magnetic disc, and a semiconductor memory.
  • the program can be installed on the computer from the removable recording medium 911 as described above, or can be downloaded to the computer via a communication network or a broadcasting network and installed on the built-in hard disk 905. That is, for example, the program transfers wirelessly from a download site to a computer via an artificial satellite for digital satellite broadcasting, or transfers to a computer by wire via a network such as LAN (Local Area Network) or the Internet. be able to.
  • LAN Local Area Network
  • the computer has a built-in CPU (Central Processing Unit) 902, and the input / output interface 910 is connected to the CPU 902 via the bus 901.
  • CPU Central Processing Unit
  • the CPU 902 executes the program stored in the ROM (Read Only Memory) 903 accordingly. .. Alternatively, the CPU 902 loads the program stored in the hard disk 905 into the RAM (Random Access Memory) 904 and executes it.
  • ROM Read Only Memory
  • the CPU 902 performs processing according to the above-mentioned flowchart or processing performed according to the above-mentioned block diagram configuration. Then, the CPU 902 outputs the processing result from the output unit 906 or transmits it from the communication unit 908, and further records it on the hard disk 905, if necessary, via the input / output interface 910.
  • the input unit 907 is composed of a keyboard, a mouse, a microphone, and the like. Further, the output unit 906 is composed of an LCD (Liquid Crystal Display), a speaker, or the like.
  • LCD Liquid Crystal Display
  • the processing performed by the computer according to the program does not necessarily have to be performed in chronological order in the order described as the flowchart. That is, the processing performed by the computer according to the program also includes processing executed in parallel or individually (for example, parallel processing or processing by an object).
  • the program may be processed by one computer (processor) or may be distributed processed by a plurality of computers. Further, the program may be transferred to a distant computer and executed.
  • the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Therefore, a plurality of devices housed in separate housings and connected via a network, and a device in which a plurality of modules are housed in one housing are both systems. ..
  • each step described in the above flowchart can be executed by one device or can be shared and executed by a plurality of devices.
  • one step includes a plurality of processes
  • the plurality of processes included in the one step can be executed by one device or shared by a plurality of devices.
  • a transmitter including a component constituting the OFDM frame including a FEC block pointer indicating the position of a FEC (Forward Error Correction) block obtained by error correction coding included in an OFDM (Orthogonal Frequency Division Multiplex) frame.
  • the component constitutes the OFDM frame including presence / absence information indicating the presence / absence of the FEC block pointer.
  • the transmission device according to ⁇ 1>, wherein the presence / absence information indicates that the FEC block pointer is present, and the FEC block pointer is included in the OFDM frame.
  • the presence / absence information is included at the beginning of data included in the OFDM frame.
  • the OFDM frame is transmitted by hierarchical transmission and is transmitted.
  • the OFDM frame is transmitted by hierarchical transmission and is transmitted.
  • the control information includes the presence / absence information for each of one or more layers.
  • the transmitting device according to ⁇ 1>, wherein the FEC block pointer is included in additional information included in the OFDM frame and control information that assists the operation of a receiving device that receives the OFDM frame.
  • the transmitting device according to any one of ⁇ 1> to ⁇ 7>, wherein the type information representing the type of the packet arranged in the payload of the FEC block is included in the OFDM frame.
  • the OFDM frame is a transmission frame having a size capable of including an integer number of FEC blocks of the first method so that the head of the FEC block of the first method and the head of the OFDM frame coincide with each other.
  • the component is described in any one of ⁇ 1> to ⁇ 8> constituting the OFDM frame including the FEC block of the second method having a size different from an integral multiple of the size of the FEC block of the first method.
  • Transmitter ⁇ 10>
  • a transmission method comprising constructing the OFDM frame including an FEC block pointer indicating the position of a FEC block obtained by error correction coding, which is included in an OFDM (Orthogonal Frequency Division Multiplex) frame.
  • the FEC block pointer is obtained from the OFDM frame including the FEC block pointer indicating the position of the FEC (Forward Error Correction) block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame, and the FEC is obtained.
  • the OFDM frame contains presence / absence information indicating the presence / absence of the FEC block pointer.
  • the receiving device according to ⁇ 12>, wherein the presence / absence information is included at the beginning of the data included in the OFDM frame.
  • the OFDM frame is transmitted by hierarchical transmission and is transmitted.
  • the receiving device according to ⁇ 13>, wherein the presence / absence information and the FEC block pointer are included at the beginning of each data segment of one or more layers.
  • the receiving device ⁇ 12>, wherein the presence / absence information is included in the control information included in the OFDM frame and assisting the operation of the receiving device.
  • the OFDM frame is transmitted by hierarchical transmission and is transmitted.
  • the control information includes the presence / absence information for each of one or more layers.
  • the FEC block pointer is included at the beginning of each data segment of the one or more layers.
  • the receiving device is included in additional information included in the OFDM frame and control information that assists the operation of the receiving device.
  • the type information indicating the type of the packet arranged in the payload of the FEC block is included in the OFDM frame.
  • the OFDM frame is a transmission frame having a size capable of including an integer number of FEC blocks of the first method so that the head of the FEC block of the first method and the head of the OFDM frame coincide with each other.
  • the receiving device according to any one of ⁇ 11> to ⁇ 18>, wherein the OFDM frame includes a FEC block of the second method having a size different from an integral multiple of the size of the FEC block of the first method.
  • the FEC block pointer is obtained from the OFDM frame including the FEC block pointer indicating the position of the FEC (Forward Error Correction) block obtained by error correction coding included in the OFDM (Orthogonal Frequency Division Multiplex) frame, and the FEC is obtained.
  • a receiving method including acquiring the FEC block according to a block pointer.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

La présente technologie concerne un dispositif d'émission, un procédé d'émission, un dispositif de réception et un procédé de réception qui permettent d'acquérir aisément un bloc FEC qui est inclus dans une trame OFDM et obtenu par codage de correction d'erreur. Le dispositif d'émission constitue une trame de multiplexage par répartition orthogonale de la fréquence (OFDM) comprenant un pointeur de bloc de correction d'erreur sans voie de retour (FEC) qui représente la position d'un bloc FEC qui est inclus dans la trame OFDM et obtenu par codage de correction d'erreur. Le dispositif de réception acquiert le pointeur de bloc FEC à partir de la trame OFDM et acquiert le bloc FEC conformément au pointeur de bloc FEC. La présente technologie peut être appliquée, par exemple, à une diffusion dans laquelle la trame OFDM est utilisée.
PCT/JP2020/033791 2019-09-18 2020-09-07 Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception WO2021054179A1 (fr)

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WO2023218981A1 (fr) * 2022-05-13 2023-11-16 ソニーグループ株式会社 Dispositif de transmission, procédé de transmission, dispositif de réception et procédé de réception
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JP2015080029A (ja) * 2013-10-15 2015-04-23 日本放送協会 送信装置、受信装置、デジタル放送システム及びチップ
JP2018078547A (ja) * 2016-10-31 2018-05-17 日本放送協会 再多重化装置、送信装置、チップ、およびプログラム
WO2018110315A1 (fr) * 2016-12-16 2018-06-21 ソニー株式会社 Dispositif et procédé de transmission, et dispositif et procédé de réception

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JP6546467B2 (ja) 2015-06-30 2019-07-17 日本放送協会 送信装置、受信装置およびチップ
JP6993175B2 (ja) 2016-10-31 2022-01-13 日本放送協会 送信装置、受信装置及びチップ

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015080029A (ja) * 2013-10-15 2015-04-23 日本放送協会 送信装置、受信装置、デジタル放送システム及びチップ
JP2018078547A (ja) * 2016-10-31 2018-05-17 日本放送協会 再多重化装置、送信装置、チップ、およびプログラム
WO2018110315A1 (fr) * 2016-12-16 2018-06-21 ソニー株式会社 Dispositif et procédé de transmission, et dispositif et procédé de réception

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