Transmitting device and program

Abstract

To provide a transmitter and a program, enabling system separation including an adjustment band.SOLUTION: A modulator 20 includes: a system separation unit 220 which assigns a data signal of a specific hierarchy among a plurality of hierarchies to a system corresponding to one physical channel among a plurality of physical channels, and assigns a data signal of other hierarchy to a system corresponding to each of the plurality of physical channels; and OFDM frame configuration units 216, 217 which each assign and send an assigned data signal to a segment constituting a physical channel corresponding to each system and an adjustment band. The system separation unit 220 includes: a segment configuration data separator 223 which assigns output segment configuration data to a system corresponding to each of the plurality of physical channels depending on the number of segments to which segment configuration data of the other hierarchy can be assigned in each of the plurality of physical channels; and adjustment band data 224 that assigns output adjustment band data to a system corresponding to each of the plurality of physical channels.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a transmitting device and a program. [Background technology]

[0002] Development of channel bonding transmission (hereinafter referred to as "CB transmission"), an optional function of the Advanced Terrestrial Broadcasting Standard (hereinafter referred to as the "Advanced Standard"), is underway. CB transmission is a function that expands transmission capacity by combining N (N is an integer satisfying 2) physical channels (physical ch). CB transmission has two modes: a plain mode in which a data stream is divided at the transport layer before error correction coding, and a MIMO (Multiple-Input and Multiple-Output)-like mode in which a data stream is divided at the physical layer after error correction coding. Hereinafter, one of the multiple physical ch constituting CB transmission is referred to as the primary ch, and the remaining physical ch are referred to as secondary ch. As a prior example, ATSC (Advanced Television Systems Committee) 3.0, the next-generation terrestrial broadcasting standard in the United States, specifies CB transmission combining two channels as an optional function (see, for example, Patent Document 1).

[0003] The advanced system has two modes: a compatibility mode in which the transmission bandwidth of one physical channel is 5.57 MHz, the same as current terrestrial digital broadcasting, and a normal mode in which the transmission bandwidth of one physical channel is expanded to 5.83 MHz. Normal mode transmits using 35 1 / 6 MHz-wide segments, which are obtained by dividing a 6 MHz bandwidth into 36 segments. Meanwhile, compatibility mode transmits using 33 segments plus adjustment bands adjacent to both sides of the 33-segment band to adjust the bandwidth to 5.57 MHz.

[0004] In addition, the advanced method, like current terrestrial digital broadcasting, enables "hierarchical transmission," in which the transmission band of one physical channel is divided into multiple segments and broadcasting services are transmitted at multiple hierarchical levels with different transmission tolerances and capacities. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-022118 Summary of the Invention [Problem to be solved by the invention]

[0006] In the modulation section of the advanced system, data carriers for the entire band are generated, and then the data carriers are divided into data carriers to be transmitted in segments (hereinafter referred to as "segment configuration data") and data to be transmitted in the adjustment band (hereinafter referred to as "adjustment band data") by band division.The segment configuration data and adjustment band data are then frequency interleaved and time interleaved, respectively, and bundled into one by band synthesis.

[0007] For example, when CB transmission is performed using two physical channels, the modulator generates data carriers for the two physical channels, and then performs system separation to divide the data carriers between the two physical channels. If the number of data carriers transmitted on the two physical channels is the same, the generated data carriers can be collectively allocated alternately to the two physical channels. On the other hand, when hierarchical transmission and CB transmission are used together, system separation must be performed taking into account the number of data carriers that can be transmitted on the two physical channels and the adjustment band. However, at present, in the compatibility mode of the advanced system, system separation that takes into account the adjustment band when hierarchical transmission and the CB transmission layer are used together has not been sufficiently studied.

[0008] The object of the present invention is to solve the above-mentioned problems and to provide a transmitting device and a program capable of system separation including adjustment bands when hierarchical transmission and CB transmission are used together in an advanced system compatibility mode. [Means for solving the problem]

[0009] In order to solve the above problems, a transmitting device according to the present invention is a transmitting device that transmits data signals of a plurality of hierarchical layers having different transmission tolerances by channel bonding transmission combining a plurality of physical channels, wherein each of the plurality of physical channels is composed of a plurality of segments and adjustment bands adjacent to both sides of a band consisting of the plurality of segments, and is equipped with a system separation unit that allocates a data signal of a specific hierarchical layer among the plurality of hierarchical layers to a system corresponding to one of the plurality of physical channels and allocates data signals of other hierarchical layers other than the specific hierarchical layer to systems corresponding to each of the plurality of physical channels, and a transmitting unit that assigns and transmits the data signals allocated for each system by the system separation unit to the segments and the adjustment band that constitute the physical channel corresponding to each system, and wherein the data signals of the other hierarchical layers include segment configuration data transmitted in the plurality of segments and adjustment band data transmitted in the adjustment band, and the system separation unit Allocating the data signal of the specific layer to a system corresponding to the one physical channel;the transmission unit is provided with a first separation unit that allocates the segment configuration data of the other layer to a system corresponding to each of the plurality of physical channels in accordance with the number of segments to which the segment configuration data of the other layer can be allocated in each of the plurality of physical channels, and a second separation unit that allocates the adjustment band data of the other layer to a system corresponding to each of the plurality of physical channels, wherein the transmission unit allocates the data signal of the specific layer allocated to the system corresponding to the one physical channel by the first separation unit to one or more inner segments of the multiple segments that make up the one physical channel, allocates the segment configuration data of the other layer allocated to the system corresponding to each of the multiple physical channels by the first separation unit to the remaining segments of the one physical channel and to segments that make up physical channels other than the one physical channel, and allocates the adjustment band data of the other layer allocated to the system corresponding to each of the multiple physical channels by the second separation unit to the adjustment bands that make up each of the multiple physical channels.

[0010] In addition, in the transmitting device of the present invention, the first separation unit assigns the segment configuration data to systems corresponding to each of the multiple physical channels in segment units to which the segment configuration data of the other layer can be assigned in each of the multiple physical channels, and the second separation unit divides the adjustment band data into the number of physical channels and assigns it to systems corresponding to each of the multiple physical channels.

[0011] In addition, in the transmitting device of the present invention, the first separation unit allocates the segment configuration data to systems corresponding to each of the multiple physical channels in data carrier units corresponding to the number of segments to which the segment configuration data of the other layers can be allocated in each of the multiple physical channels, and the second separation unit sequentially allocates the adjustment band data of the B layer one data carrier at a time to systems corresponding to each of the multiple physical channels.

[0012] In order to solve the above problems, a transmitting device according to the present invention is a transmitting device that transmits data signals of a plurality of hierarchical layers with different transmission tolerances by channel bonding transmission combining a plurality of physical channels, wherein each of the plurality of physical channels is composed of a plurality of segments and adjustment bands adjacent to both sides of a band consisting of the plurality of segments, and is equipped with a system separation unit that allocates a data signal of a specific hierarchical layer among the plurality of hierarchical layers to a system corresponding to one of the plurality of physical channels and allocates data signals of other hierarchical layers other than the specific hierarchical layer to systems corresponding to each of the plurality of physical channels, and a transmitting unit that assigns the data signals allocated for each system by the system separation unit to the segments and the adjustment band that constitute the physical channel corresponding to each system, and transmits the data signals, wherein the data signals include segment configuration data to be transmitted in the plurality of segments and adjustment band data to be transmitted in the adjustment band, and the system separation unit Allocating the data signal of the specific layer to a system corresponding to the one physical channel; a first demultiplexing unit that allocates the segment configuration data of the other layer to a system corresponding to each of the plurality of physical channels in accordance with the number of segments to which the segment configuration data of the other layer can be allocated in each of the plurality of physical channels; and a second demultiplexing unit that allocates the adjustment band data of the specific layer to a system corresponding to the one physical channel and allocates the adjustment band data of the other layer to a system corresponding to a physical channel other than the one physical channel, wherein the sending unit allocates the data signal of the specific layer allocated to the system corresponding to the one physical channel by the first demultiplexing unit to one or more outer segments out of the plurality of segments constituting the one physical channel, and physicsThe segment configuration data of the other hierarchical layers allocated to the systems corresponding to each channel is assigned to the remaining segments of the one physical channel and to the segments constituting physical channels other than the one physical channel, the adjustment band data of the specific hierarchical layer allocated by the second separation unit to the system corresponding to the one physical channel is assigned to the adjustment band constituting the one physical channel, and the adjustment band data of the other hierarchical layers allocated by the second separation unit to the system corresponding to physical channels other than the one physical channel is assigned to the adjustment band constituting physical channels other than the one physical channel.

[0013] In order to solve the above problem, a transmitting device according to the present invention is a transmitting device that transmits data signals of a plurality of hierarchical layers with different transmission tolerances by channel bonding transmission combining a plurality of physical channels, wherein each of the plurality of physical channels is composed of a plurality of segments and adjustment bands adjacent to both sides of a band consisting of the plurality of segments, and the transmitting device comprises: a system separation unit that allocates a data signal of a specific hierarchical layer among the plurality of hierarchical layers to a system corresponding to one of the plurality of physical channels, and allocates data signals of other hierarchical layers other than the specific hierarchical layer to systems corresponding to each of the plurality of physical channels; and a transmitting unit that assigns the data signals allocated for each system by the system separation unit to the segments and the adjustment bands that constitute the physical channels corresponding to each system, and transmits the data signals, and adjustment band data transmitted in the adjustment band, and the system separation unit comprises a first separation unit that allocates the segment configuration data of each of the plurality of hierarchies to a system corresponding to each of the plurality of physical channels according to the number of segments to which the segment configuration data of each of the plurality of hierarchies can be allocated in each of the plurality of physical channels, and a second separation unit that allocates the adjustment band data of a hierarchical layer in which the segment configuration data is allocated to one or more outer segments of the plurality of segments constituting the physical channel to a system corresponding to the physical channel, and the transmission unit allocates the adjustment band data of a hierarchical layer in which the segment configuration data is allocated to one or more outer segments of the plurality of segments constituting the physical channel to the adjustment band constituting the physical channel in each of the plurality of physical channels.

[0014] In order to achieve the above object, a program according to the present invention causes a computer to operate as any one of the above-described transmission devices. [Effects of the Invention]

[0015] According to the transmitting device and the program of the present invention, when hierarchical transmission and CB transmission are used together in a compatible mode of the advanced standard, system separation including the adjustment band can be performed. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram illustrating an example of the configuration of a transmission / reception system in which CB transmission in MIMO Like mode is performed when N=2, according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a diagram illustrating an example of the configuration of the modulation device illustrated in FIG. [Figure 3] 3 is a diagram schematically illustrating an example of the operation up to the configuration of an OFDM frame by the modulation device shown in FIG. 2. FIG. [Figure 4] FIG. 2 is a diagram illustrating another example of the configuration of the modulation device shown in FIG. [Figure 5] FIG. 5 is a diagram schematically illustrating the operation up to the configuration of an OFDM frame by the modulation device shown in FIG. [Figure 6] 5 is a diagram illustrating an example of the configuration of a system separation unit illustrated in FIG. 4. FIG. [Figure 7] 7 is a diagram for explaining an example of system separation performed by a segment configuration data separation unit and an adjustment band data separation unit shown in FIG. 6. FIG. [Figure 8] 7 is a diagram for explaining another example of system separation by the segment configuration data separation unit and the adjustment band data separation unit shown in FIG. 6. FIG. [Figure 9] FIG. 9 is a diagram for explaining in more detail the system separation shown in FIG. 8. [Figure 10] FIG. 2 is a diagram illustrating an example of the configuration of the demodulation device shown in FIG. [Figure 11] FIG. 2 is a diagram illustrating another example of the configuration of the demodulation device shown in FIG. [Figure 12] 10 is a diagram schematically illustrating another example of the operation up to the configuration of an OFDM frame by the modulation device shown in FIG. 2. FIG. [Figure 13] FIG. 10 is a diagram schematically illustrating yet another example of the operation up to the configuration of an OFDM frame by the modulation device shown in FIG. [Figure 14]FIG. 14 is a diagram for explaining another example of the system separation shown in FIG. [Figure 15] FIG. 15 is a diagram for explaining in more detail the system separation shown in FIG. 14. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] Fig. 1 is a diagram showing an example of the configuration of a transmission / reception system 1 according to an embodiment of the present invention, in which channel bonding transmission (CB transmission) in MIMO Like mode with N=2 is performed.

[0019] It is assumed that the transmission / reception system 1 employs a compatibility mode. Therefore, the bandwidth of one physical channel consists of 33 segments and adjustment bands adjacent to both sides of the 33-segment band. Furthermore, the transmission / reception system 1 employs hierarchical transmission, transmitting broadcasting services at multiple hierarchical levels with different transmission tolerances and capacities, similar to the current ISDB-T system. In the advanced system, it is being considered to transmit emergency earthquake alerts and other information with lower latency than the data signals of each hierarchical level using the same physical channel as the data signals of each hierarchical level. The transmission path over which such low-latency data signals are transmitted is referred to as LLch. The following description assumes that the transmission / reception system 1 also employs hierarchical transmission (e.g., three hierarchical levels (A, B, and C)) and LLch transmission.

[0020] The transmission / reception system 1 shown in Fig. 1 includes a remultiplexing device 10, a modulation device 20 as a transmission device according to the present invention, two transmitters 30 (transmitters 30p and 30s), two receivers 40 (receivers 40p and 40s), and a demodulation device 50. The transmitter 30p and the receiver 40p are provided corresponding to a primary channel, and the transmitter 30s and the receiver 40s are provided corresponding to a secondary channel. Note that, in this embodiment, an example is described in which CB transmission with N = 2 is performed, but the present invention is not limited to this and can also be applied to a case in which CB transmission combining three or more physical channels is performed.

[0021] The remultiplexing device 10 remultiplexes the data signals of each layer of hierarchical transmission with the data signal of the LL channel. The remultiplexing device 10 also generates a TMCC (Transmission and Multiplexing Configuration Control) signal based on TMCC information and multiplexes it onto the data signal of each layer. The remultiplexing device 10 also multiplexes SI (Signaling Information) (TLV-SI) in TLV (Type Length Value) format onto the data signal of each layer or the data signal of the LL channel. The SI defines, for example, a terrestrial distribution system descriptor that indicates the physical conditions of the terrestrial transmission path. The TLV-SI is control information for CB transmission and includes, for example, a list of physical channels that make up the CB transmission within the area where the transmission / reception system 1 broadcasts. The remultiplexing device 10 outputs the remultiplexed data signal (multiplexed frame) to the modulation device 20.

[0022] The modulation device 20 divides the multiplexed frame output from the remultiplexing device 10 into a system corresponding to the primary channel and a system corresponding to the secondary channel, and constructs an OFDM frame in which the data signals of each layer, the LL channel data signals, the TMCC signals, etc. are placed on predetermined carriers, and outputs the frame to the transmitters 30p and 30s.

[0023] The transmitter 30p transmits the OFDM frame output from the modulation device 20 via the primary channel. The transmitter 30s transmits the OFDM frame output from the modulation device 20 via the secondary channel. The transmitters 30p and 30s are synchronized and emit broadcast waves at the same timing.

[0024] The receiver 40p receives the broadcast wave transmitted from the transmitter 30p via the primary channel and outputs the received signal to the demodulation device 50. The receiver 40s receives the broadcast wave transmitted from the transmitter 30s via the secondary channel and outputs the received signal to the demodulation device 50.

[0025] When CB transmission is being performed, the demodulation device 50 demodulates the received signal of the receiver 40p and the received signal of the receiver 40s, and acquires and outputs the data signals of each layer and the data signal of the LLch transmitted via the primary ch and secondary ch.

[0026] Next, a description will be given of the configurations of the modulation device 20 and demodulation device 50 according to this embodiment. The configurations of the remultiplexing device 10, transmitters 30p and 30s, and receivers 40p and 40s are not directly related to the present invention, so a description thereof will be omitted.

[0027] Fig. 2 is a diagram showing an example of the configuration of a modulation device 20 according to this embodiment. Fig. 2 shows an example of the configuration of a modulation device 20 when hierarchical transmission of three layers is performed.

[0028] As shown in FIG. 2 , modulating device 20 according to this embodiment includes input I / F section 201, error correction coding section 202, bit interleaving section 203, mapping section 204, system demultiplexing sections 205a, 205b, 205c, pilot signal generation section 207, primary ch TMCC information bit generation section 208, secondary ch TMCC information bit generation section 209, primary ch TMCC signal generation section 210, secondary ch TMCC signal generation section 211, hierarchical synthesis sections 212, 213, time-frequency interleaving sections 214, 215, OFDM frame construction sections 216, 217, and IFFT / GI adding sections 218, 219. An error correction coding unit 202, a bit interleaving unit 203, and a mapping unit 204 are provided corresponding to layers A, B, and C, respectively, but for simplicity of the drawing, only the configuration corresponding to layer A is shown in Figure 2. A layer combining unit 212, a time-frequency interleaving unit 214, an OFDM frame configuring unit 216, and an IFFT-GI adding unit 218 are provided corresponding to the primary channel. A layer combining unit 213, a time-frequency interleaving unit 215, an OFDM frame configuring unit 217, and an IFFT-GI adding unit 219 are provided corresponding to the secondary channel.

[0029] Input I / F unit 201 receives a multiplexed frame from remultiplexer 10, in which data signals for each layer, LL channel XMI packets, packets in which synchronization control information is stored in the data field, and packets in which predetermined stuff bits are stored in the data field are multiplexed into one system. The synchronization control information includes transmission parameters for configuring the OFDM frame, the timing of transmitting the OFDM frame, and TMCC information related to the transmission of the data signal for each layer. Input I / F unit 201 extracts the data signal for each layer from the input multiplexed frame and outputs it to error correction coding unit 202 for the corresponding layer. Input I / F unit 201 extracts the LL channel data signal from the input multiplexed frame and outputs it to OFDM frame constructor 216 and OFDM frame constructor 217. Input I / F unit 701 extracts TMCC information from the input multiplexed frame and outputs it to pilot signal generator 207, primary channel TMCC information bit generator 208, and secondary channel TMCC information bit generator 209.

[0030] The error correction coding unit 202 performs error correction coding on the corresponding hierarchical data signal input from the input I / F unit 201 in units of FEC (Forward Error Correction) blocks, and outputs the result to the bit interleaving unit 203 .

[0031] The bit interleaving unit 203 performs bit-by-bit interleaving on the data string output from the error correction coding unit 202. An example of bit-by-bit interleaving is bit rotation, which blocks the bit string in predetermined units and changes the bit order within each block. The bit interleaving unit 203 outputs the interleaved data string to the mapping unit 204.

[0032] The mapping unit 204 maps the data sequence output from the bit interleaving unit 203 onto the IQ plane for each predetermined number of bits, based on the modulation scheme of the corresponding layer, and performs carrier modulation. In this way, the mapping unit 204 converts the data sequence into carrier symbols. The mapping unit 204 provided corresponding to layer A outputs the generated carrier symbols to the demultiplexing unit 205a corresponding to layer A. The mapping unit 204 provided corresponding to layer B outputs the generated carrier symbols to the demultiplexing unit 205b corresponding to layer B. The mapping unit 204 provided corresponding to layer C outputs the generated carrier symbols to the demultiplexing unit 205c corresponding to layer C.

[0033] The demultiplexer 205a receives carrier symbols obtained by carrier-modulating the data signal of layer A from the mapping unit 204 provided corresponding to layer A. When the data signal of layer A is transmitted via CB, the demultiplexer 205a separates the input carrier symbols into two systems (a system corresponding to the primary channel and a system corresponding to the secondary channel) (system separation). The demultiplexer 205a outputs the carrier symbols of the system corresponding to the primary channel to the layer combiner 212 and outputs the carrier symbols of the system corresponding to the secondary channel to the layer combiner 213. When the data signal of layer A is not transmitted via CB, the demultiplexer 205a outputs the input carrier symbols to the layer combiner 212 or the layer combiner 213. Similar to the demultiplexer 205a, the demultiplexer 205b distributes the data signal (carrier symbols) of layer B to the layer combiner 212 and the layer combiner 213 and outputs them. Similar to the system separation unit 205a, the system separation unit 205c distributes and outputs data signals (carrier symbols) of layer C to the layer combining unit 212 and the layer combining unit 213. For example, if data signals of layer A are not transmitted via CB and data signals of layers B and C are transmitted via CB, the system separation unit 205a outputs data signals of layer A to the layer combining unit 212, the system separation unit 205b distributes and outputs data signals of layer B to the layer combining unit 212 and the layer combining unit 213, and the system separation unit 205c distributes and outputs data signals of layer C to the layer combining unit 212 and the layer combining unit 213. As described above, in this embodiment, data signals of a specific layer (layer A) among multiple layers are allocated to a system corresponding to one physical channel (primary channel) of two physical channels (primary channel and secondary channel). Furthermore, data signals of layers other than the specific layer (layers B and C) are distributed to systems corresponding to the two physical channels, respectively. The details of the separation by the separation unit 205 will be described later.

[0034] Pilot signal generating section 207 generates a pilot signal to be incorporated into an OFDM frame based on the TMCC information input from input I / F section 201 , and outputs the generated pilot signal to OFDM frame configuring section 216 and OFDM frame configuring section 217 .

[0035] Based on the TMCC information input from input I / F unit 201, primary ch TMCC information bit generation unit 208 generates TMCC information bits for generating a TMCC signal to be transmitted on the primary ch. Primary ch TMCC information bit generation unit 208 generates TMCC information bits by superimposing a CB flag, which indicates whether CB transmission is to be performed, on the TMCC information. Furthermore, in the above-mentioned example in which CB transmission is not performed on the data signal of layer A and it is transmitted only on the primary ch, primary ch TMCC information bit generation unit 208 turns on the partial reception flag to generate TMCC information bits. Primary ch TMCC information bit generation unit 208 outputs the generated TMCC information bits to primary ch TMCC signal generation unit 210.

[0036] Secondary ch TMCC information bit generation section 209 generates TMCC information bits for generating a TMCC signal to be transmitted on the secondary channel, based on the TMCC information input from input I / F section 201. Secondary ch TMCC information bit generation section 209 generates TMCC information bits by superimposing a CB flag, which indicates whether CB transmission is to be performed, on the TMCC information. Furthermore, in the above-mentioned example in which CB transmission is not performed on the data signal of layer A and it is transmitted only on the primary channel, secondary ch TMCC information bit generation section 209 turns off the partial reception flag and generates TMCC information bits. Secondary ch TMCC information bit generation section 209 outputs the generated TMCC information bits to secondary ch TMCC signal generation section 211.

[0037] Based on the TMCC information bits output from primary ch TMCC information bit generation section 208 , primary ch TMCC signal generation section 210 generates a TMCC signal to be transmitted on the primary channel, and outputs it to OFDM frame configuration section 216 .

[0038] Secondary ch TMCC signal generation section 211 generates a TMCC signal to be transmitted on the secondary channel based on the TMCC information bits output from secondary ch TMCC information bit generation section 209 , and outputs this to OFDM frame configuration section 217 .

[0039] The hierarchical combining unit 212 hierarchically combines the carrier symbols output from the system demultiplexing unit 205a, the carrier symbols output from the system demultiplexing unit 205b, and the carrier symbols output from the system demultiplexing unit 205c, and outputs the combined signal to the time-frequency interleaving unit 214.

[0040] The hierarchical combining unit 213 hierarchically combines the carrier symbols output from the system separation unit 205a, the carrier symbols output from the system separation unit 205b, and the carrier symbols output from the system separation unit 205c, and outputs the combined signal to the time-frequency interleaving unit 215.

[0041] The time-frequency interleaving unit 214 performs interleaving in the time direction and frequency direction on the carrier symbols output from the layer combining unit 212, and outputs the result to the OFDM frame configuring unit 216. The time-frequency interleaving unit 215 performs interleaving in the time direction and frequency direction on the carrier symbols output from the layer combining unit 213, and outputs the result to the OFDM frame configuring unit 217.

[0042] The OFDM frame constructing unit 216 adds the LL channel data signal, pilot signal, and TMCC signal to the carrier symbols inputted from the time-frequency interleaving unit 214 to construct an OFDM frame, and outputs this to the IFFT-GI adding unit 218. The OFDM frame constructing unit 217 adds the LL channel data signal, pilot signal, and TMCC signal to the carrier symbols inputted from the time-frequency interleaving unit 215 to construct an OFDM frame, and outputs this to the IFFT-GI adding unit 219.

[0043] The IFFT / GI adding unit 218 performs an IFFT (Inverse Fast Fourier Transform) and adds a GI (Guard Interval) to the OFDM frame output from the OFDM frame configuring unit 216, and outputs the result to the transmitter 30p. The IFFT / GI adding unit 219 performs an IFFT and adds a GI to the OFDM frame output from the OFDM frame configuring unit 217, and outputs the result to the transmitter 30s.

[0044] 3 is a diagram schematically illustrating the operation of the modulation device 20 shown in FIG. 2 up to the construction of an OFDM frame. In FIG. 3, hierarchical transmission of two layers, layer A and layer B, is explained as an example. Also, in FIG. 3, a case where a data signal of layer A is transmitted in a partial reception band, which is the central band of the primary channel, is explained as an example. As described above, this embodiment assumes a compatible mode. Therefore, the band of one physical channel is composed of 33 segments and adjustment bands adjacent to both sides of the band consisting of 33 segments.

[0045] The data signal of layer A (layer A stream) is allocated to four segments of the primary channel and not to the secondary channel. Therefore, the data signal of layer B (layer B stream) is distributed to 29 segments of the primary channel, 33 segments of the secondary channel, and the adjustment band.

[0046] As shown in Figure 3, the mapping unit 204 corresponding to layer A generates carrier symbols from the data signal of layer A allocated to the primary channel. Specifically, the mapping unit 204 corresponding to layer A generates carrier symbols for four segments of the primary channel allocated to the transmission of the data signal of layer A. Furthermore, the mapping unit 204 corresponding to layer B generates carrier symbols for 62 segments (29 segments for the primary channel and 33 segments for the secondary channel) and the adjustment band allocated to the transmission of the data signal of layer B. Hereinafter, data signals transmitted in the 62 segments allocated to the transmission of the data signal of layer B will be referred to as segment configuration data. Furthermore, data signals transmitted in the adjustment band will be referred to as adjustment band data. Therefore, data signals of layers other than a specific layer (layer A) (layer B) include segment configuration data transmitted in multiple segments and adjustment band data transmitted in the adjustment band.

[0047] Since the data signal of layer A is not transmitted via CB, demultiplexing unit 205a outputs the carrier symbols (segment configuration data) generated by mapping unit 204 corresponding to layer A as is to layer combiner 212. Furthermore, demultiplexing unit 205b divides the carrier symbols for 62 segments generated by mapping unit 204 corresponding to layer B into carrier symbols for 29 segments and carrier symbols for 33 segments, as shown in FIG. 3. Demultiplexing unit 205b outputs the carrier symbols for 29 segments (segment configuration data) to layer combiner 212 corresponding to the primary channel, and outputs the carrier symbols for 33 segments to layer combiner 213 corresponding to the secondary channel. Furthermore, demultiplexing unit 205b divides the carrier symbols for the adjustment band (adjustment band data) and outputs them to layer combiner 212 and layer combiner 213.

[0048] As shown in Fig. 3, the hierarchical combining unit 212 combines (hierarchically combines) the carrier symbols (segment configuration data of layer A) output from the system separation unit 205a and the carrier symbols (segment configuration data and adjustment band data of layer B) output from the system separation unit 205b. The hierarchical combining unit 213 combines (hierarchically combines) the carrier symbols (segment configuration data and adjustment band data of layer B) output from the system separation unit 205b and the carrier symbols (segment configuration data and adjustment band data of layer C) output from the system separation unit 205c. However, in the example of Fig. 3, layer C is not assumed, so hierarchical combining by the hierarchical combining unit 213 is not necessary.

[0049] The time-frequency interleaving unit 214 divides (band division) the carrier symbols after hierarchical combining by the hierarchical combining unit 212 into a band (partial reception band) of 9 segments including the carrier symbols of hierarchical layer A and the carrier symbols (segment configuration data) of hierarchical layer B, a band of the remaining 24 segments, and a band of the adjustment band. The time-frequency interleaving unit 214 performs interleaving in the time direction and frequency direction (time-frequency IL) for each divided band, and combines (band combination) the interleaved carrier symbols.

[0050] The time-frequency interleaving unit 215 divides (band division) the carrier symbols (only the carrier symbols of layer B in the example of FIG. 3) after hierarchical combining by the layer combining unit 213 into a band for 33 segments and a band for the adjustment band. The time-frequency interleaving unit 215 performs interleaving in the time direction and frequency direction (time-frequency IL) for each divided band, and combines (band combination) the interleaved carrier symbols.

[0051] The OFDM frame construction unit 216 constructs (OFDM frames) an OFDM frame from the interleaved carrier symbols, as shown in Figure 3, in which the carrier symbols of layer A and the carrier symbols of layer B interleaved with the carrier symbols of layer A (segment construction data) are placed in the nine segments (partial reception band) at the center of the primary ch band, the remaining carrier symbols of layer B (segment construction data) allocated to the primary ch are placed in the other segments, and carrier symbols of the adjustment band data are placed adjacent to both sides of them.

[0052] The OFDM frame construction unit 217 constructs (OFDM frames) from the interleaved carrier symbols in such a way that the carrier symbols (segment construction data) of layer B allocated to 33 segments are arranged, and the carrier symbols of the adjustment band data are arranged adjacent to both sides of the B layer carrier symbols (segment construction data) as shown in FIG. 3 .

[0053] In the modulation device 20 shown in Fig. 2, an example has been described in which carrier symbols generated by the mapping unit 204 are distributed into two systems by the system demultiplexing units 205 corresponding to each layer. That is, in the modulation device 20 shown in Fig. 2, the carrier symbols after mapping are demultiplexed into two systems, and time-frequency interleaving is performed individually on the separated carrier symbols, but the present invention is not limited to this. For example, the carrier symbols after time-frequency interleaving may be demultiplexed into two systems. Below, a configuration of the modulation device 20 when the carrier symbols after time-frequency interleaving are demultiplexed into two systems will be described.

[0054] Fig. 4 is a diagram showing another example of the configuration of the modulation device 20 according to this embodiment. In Fig. 4, the same components as those in Fig. 2 are given the same reference numerals, and the description thereof will be omitted.

[0055] Modulation device 20 shown in Figure 4 includes input I / F section 201, error correction coding section 202, bit interleaving section 203, mapping section 204, pilot signal generation section 207, primary ch TMCC information bit generation section 208, secondary ch TMCC information bit generation section 209, primary ch TMCC signal generation section 210, secondary ch TMCC signal generation section 211, OFDM frame construction sections 216, 217, IFFT / GI addition sections 218, 219, system separation section 220, hierarchical synthesis section 230, and time / frequency interleaving section 240. The modulation device 20 shown in FIG. 4 differs from the modulation device 20 shown in FIG. 2 in that system separation units 205a, 205b, and 205c, hierarchical synthesis unit 213, and time-frequency interleaving unit 215 are deleted, hierarchical synthesis unit 212 is replaced with hierarchical synthesis unit 230, time-frequency interleaving unit 214 is replaced with time-frequency interleaving unit 240, and system separation unit 220 is added.

[0056] The layer combining unit 230 combines the carrier symbols output from the mapping unit 204 corresponding to each layer, and outputs the combined symbols to the time-frequency interleaving unit 240 .

[0057] The time-frequency interleaving unit 240 performs interleaving in the time direction and the frequency direction on the carrier symbols output from the layer combining unit 230 and outputs the interleaved signals to the system demultiplexing unit 220 .

[0058] The system separation unit 220 is provided between the time-frequency interleaving unit 240 and the OFDM frame composing units 216, 712. The system separation unit 220 separates the carrier symbols output from the time-frequency interleaving unit 240 into a system corresponding to the primary channel and a system corresponding to the secondary channel. The system separation unit 220 outputs the carrier symbols of the system corresponding to the primary channel to the OFDM frame composing unit 216, and outputs the carrier symbols of the system corresponding to the secondary channel to the OFDM frame composing unit 217. Here, for example, if the data signal of layer A is not transmitted via CB and the data signals of layers B and C are transmitted via CB, the system separation unit 220 allocates the carrier symbols of layer A only to the system corresponding to the primary channel and distributes the carrier symbols of layers B and C to the system corresponding to the primary channel and the system corresponding to the secondary channel.

[0059] Figure 5 is a diagram schematically illustrating the operation of the modulation device 20 shown in Figure 4 up to the construction of an OFDM frame. Figure 5 illustrates an example of hierarchical transmission of two layers, layer A and layer B. Figure 5 also illustrates an example of transmitting a data signal of layer A in a partial reception band, which is the central band of the primary channel. As mentioned above, this embodiment assumes a compatible mode. Therefore, the band of one physical channel consists of 33 segments and adjustment bands adjacent to both sides of the band consisting of 33 segments.

[0060] The hierarchical synthesis unit 230 synthesizes (hierarchically synthesizes) the carrier symbols of layer A (segment configuration data of layer A) allocated to the four segments of the primary ch, the carrier symbols of layer B (segment configuration data of layer B) allocated to the 29 segments of the primary ch and the 33 segments of the secondary ch, and the carrier symbols of layer B (adjustment band data) allocated to the adjustment band.

[0061] The time-frequency interleaving unit 240 divides (band division) the carrier symbols after hierarchical combining by the hierarchical combining unit 230 into a band (partial reception band) of 9 segments including the carrier symbols of hierarchical layer A and the carrier symbols of hierarchical layer B (segment configuration data of hierarchical layer B), a band of the remaining 57 segments, and a band of the adjustment band. The time-frequency interleaving unit 240 performs interleaving in the time direction and frequency direction (time-frequency IL) for each divided band, and outputs the interleaved carrier symbols to the system demultiplexing unit 220.

[0062] The system separation unit 220 divides the segment configuration data after interleaving by the time-frequency interleaving unit 240 into carrier symbols for 24 (=33-4 (layer A)-5 (layer B)) segments that can be allocated to the primary channel and carrier symbols for 33 segments that can be allocated to the secondary channel. In addition, the system separation unit 220 divides the carrier symbols for the adjustment band (adjustment band data) into a system corresponding to the primary channel and a system corresponding to the secondary channel.

[0063] The demultiplexing unit 220 combines (band combines) carrier symbols for 9 segments, which is the partial reception band, carrier symbols for 24 segments (segment configuration data of layer B), and carrier symbols for the adjustment band of the primary ch (adjustment band data), and outputs the combined result to the OFDM frame composing unit 216. The demultiplexing unit 220 also combines (band combines) carrier symbols for 33 segments (segment configuration data of layer B) and carrier symbols for the adjustment band of the secondary ch (adjustment band data), and outputs the combined result to the OFDM frame composing unit 217.

[0064] The OFDM frame constructing unit 216 constructs (OFDM framing) an OFDM frame from the carrier symbols after band synthesis by the system demultiplexing unit 220, in which the carrier symbols of layer A and the carrier symbols of layer B interleaved with the carrier symbols of layer A (segment configuration data) are arranged in 9 segments (partial reception band) at the center of the band of the primary ch, the remaining carrier symbols of layer B (segment configuration data) allocated to the primary ch are arranged in the other segments, and the carrier symbols of the adjustment band data are arranged adjacently on both sides thereof, as shown in Fig. 5. Furthermore, the OFDM frame constructing unit 717 constructs (OFDM framing) an OFDM frame from the carrier symbols after band synthesis by the system demultiplexing unit 720, in which the remaining carrier symbols of layer B (segment configuration data) allocated to the secondary ch are arranged in 33 segments, and the carrier symbols of the adjustment band data are arranged adjacently on both sides thereof. In this way, the OFDM frame constructing unit 216 allocates the data signal of layer A (a specific layer) allocated to the system corresponding to the primary ch (one physical channel) to one or more inner segments (four segments in the example of FIG. 5) among the multiple segments constituting the primary ch. Furthermore, the OFDM frame constructing units 216, 217 allocate the segment configuration data of layer B (another layer) allocated to the systems corresponding to the primary ch and secondary ch (multiple physical channels) respectively to the remaining segments of the primary ch and to the segments constituting the secondary ch (physical channel other than one physical channel). Furthermore, the OFDM frame constructing units 216, 217 allocate the adjustment band data of layer B allocated to the systems corresponding to the primary ch and secondary ch respectively to the adjustment bands constituting the primary ch and secondary ch respectively.

[0065] FIG. 6 is a diagram showing an example of the configuration of the system demultiplexing unit 220 shown in FIG.

[0066] As shown in FIG. 6, the system demultiplexer 220 includes a switching unit 221, a switching control unit 222, a segment configuration data demultiplexer 223 as a first demultiplexer, and an adjustment band data demultiplexer 224 as a second demultiplexer.

[0067] The switching unit 221 receives, as input data, carrier symbols after time-frequency interleaving from the time-frequency interleaving unit 240. The switching unit 221 switches the output destination between the segment configuration data and the adjustment band data included in the input data under the control of the switching control unit 222, which will be described later. Specifically, the switching unit 221 outputs the segment configuration data to the segment configuration data separation unit 223, and outputs the adjustment band data to the adjustment band data separation unit 224.

[0068] The switching control unit 222 controls the output destination of data by the switching unit 221 based on control information. The control information is, for example, information such as the bandwidth (whether the mode is compatibility mode or normal mode), the number of layers in hierarchical transmission, the number of segments, and the SP (Scattered Pilot) pattern. When the bandwidth is compatibility mode, the switching control unit 222 determines whether the input data is segment configuration data or adjusted band data based on the number of data carriers determined from the number of layers, the number of segments, the SP pattern, and the like. If the switching control unit 222 determines that the input data is segment configuration data, it instructs the switching unit 221 to output the input data to the segment configuration data separation unit 223, and if it determines that the input data is adjusted band data, it instructs the switching unit 221 to output the input data to the adjusted band data separation unit 224.

[0069] Segment configuration data separation section 223 separates (system-separates) the segment configuration data output from switching section 221 and outputs it to OFDM frame configuration section 216 and OFDM frame configuration section 217 .

[0070] The adjustment band data separation unit 224 separates (system separation) the adjustment band data output from the switching unit 221 and outputs it to the OFDM frame composition unit 216 and the OFDM frame composition unit 217 .

[0071] Although the configuration of the demultiplexer 220 has been described with reference to FIG. 6, the demultiplexer 205 (the demultiplexers 205a, 205b, and 205c) shown in FIG. 2 may also have the same configuration.

[0072] 6, carrier symbols obtained by carrier-modulating a data signal of layer A are input as input data to switching unit 221 from mapping unit 204 corresponding to layer A. Switching unit 221 outputs the segment configuration data included in the input data to segment configuration data separation unit 223, and outputs the adjustment band data to adjustment band data separation unit 224. Segment configuration data separation unit 223 separates the segment configuration data output from switching unit 221, and outputs it to layer combining unit 212 and layer combining unit 213. Adjustment band data separation unit 224 separates the adjustment band data output from switching unit 221, and outputs it to layer combining unit 212 and layer combining unit 213. Separation units 205b and 205c also have a configuration similar to that of separation unit 205a, and separate the data signals of the corresponding layers (segment configuration data and adjustment band data), and output them to layer combining unit 212 and layer combining unit 213.

[0073] Next, the separation of the streams by the stream separation unit 220 (the segment configuration data separation unit 223 and the adjustment band data separation unit 224) will be described using a specific example.

[0074] Fig. 7 is a diagram showing an example of system separation performed by the system separation unit 220. In Fig. 7, hierarchical transmission on two layers (layer A and layer B) will be described as an example.

[0075] As explained with reference to Figures 3 and 5, the layer A stream is assigned to four segments of the primary channel, and the layer B stream is assigned to 29 segments of the primary channel excluding these four segments, 33 segments of the secondary channel, and the adjustment band.

[0076] 7, the segment configuration data separation unit 223 outputs 4 segments of layer A segment configuration data and the first 29 segments of layer B stream segment configuration data to the OFDM frame configuration unit 216 corresponding to the primary channel, and outputs the remaining 33 segments of segment configuration data to the OFDM frame configuration unit 217 corresponding to the secondary channel. In this way, the segment configuration data separation unit 223 allocates the layer B (other layer) segment configuration data output from the switching unit 221 to systems corresponding to each of the multiple physical channels in segment units to which layer B segment configuration data can be allocated, in each of the primary channel and secondary channel.

[0077] 7, the adjustment band data separation unit 224 outputs the first half of the adjustment band data to the OFDM frame configuration unit 216 corresponding to the primary channel, and outputs the remaining adjustment band data to the OFDM frame configuration unit 217 corresponding to the secondary channel. In this way, the adjustment band data separation unit 224 divides the adjustment band data of layer B output from the switching unit 221 into two and allocates them to the systems corresponding to the primary channel and the secondary channel, respectively. In other words, the adjustment band data separation unit 224 divides the adjustment band data by the number of physical channels constituting the CB transmission, and allocates them to the systems corresponding to each of the multiple physical channels.

[0078] Fig. 8 is a diagram showing another example of system separation by the system separation unit 220. In Fig. 8, hierarchical transmission on two layers (layer A and layer B) will also be described as an example.

[0079] 8, the segment configuration data separation unit 223 may divide the segment configuration data of the B hierarchical layer in predetermined units and allocate the data to the systems corresponding to the primary ch and the secondary ch, respectively. Also, the adjustment band data separation unit 224 may divide the adjustment band data of the B hierarchical layer in predetermined units and allocate the data to the systems corresponding to the primary ch and the secondary ch, respectively.

[0080] The system separation by the segment configuration data separation unit 223 and the adjustment band data separation unit 224 shown in Figure 8 will be described in more detail with reference to Figure 9. In Figure 9, the number of data carriers per segment is N, and the number of data carriers in the adjustment band is n. Also in Figure 9, the number of segments to which segment configuration data of layer B can be assigned in the primary channel is X, and the number of segments to which segment configuration data of layer B can be assigned in the secondary channel is Y. In this case, the number of data carriers for the segment configuration data of layer B is (X+Y)×N. Also, the number of data carriers for the adjustment band data is 2n.

[0081] The segment configuration data separation unit 223 allocates the segment configuration data of layer B, from the beginning, to the systems corresponding to the primary ch and the secondary ch in data carrier units according to the number of segments to which the segment configuration data of layer B can be allocated in each of the primary ch and the secondary ch. That is, as shown in Fig. 9, the segment configuration data of layer B is allocated alternately from the beginning to the systems corresponding to the primary ch and the secondary ch in units of X data carriers (data carriers from 0 to x-1), which is the same number of segments to which the segment configuration data of layer B can be allocated in the primary ch, and Y data carriers, which is the same number of segments to which the segment configuration data of layer B can be allocated in the secondary ch.

[0082] As shown in FIG. 9, the adjustment band data separation unit 224 sequentially allocates the adjustment band data, starting from the beginning, one data carrier at a time to the systems corresponding to the primary channel and the secondary channel.

[0083] Next, the configuration of the demodulation device 50 will be described.

[0084] Fig. 10 is a diagram showing an example of the configuration of a demodulation device 50. The demodulation device 50 shown in Fig. 10 demodulates a signal received by a receiver 40 from a broadcast wave modulated by the modulation device 20 shown in Fig. 2 and transmitted via a transmitter 30.

[0085] As shown in FIG. 10 , the demodulation device 50 includes tuners 501 and 502, GI removal and FFT units 503 and 504, OFDM frame synchronization units 505 and 506, TMCC demodulation units 507 and 508, pilot extraction units 509 and 510, channel estimation units 511 and 512, waveform equalization units 513 and 514, time-frequency deinterleaving units 515 and 516, LLch demodulation and error correction decoding units 517 and 518, LLR calculation and error correction decoding units 519 and 524, a CB transmission discrimination unit 520, a secondary channel discrimination unit 521, a P / S synchronization unit 522, a synthesis unit 523, and an output unit 525.

[0086] A signal received by a receiver 40p that receives broadcast waves is input to the tuner 501. The tuner 501 selects and acquires a signal of a specified physical channel from the input received signal. The tuner 501 performs A / D conversion on the acquired signal and outputs the A / D converted signal to the GI removal / FFT unit 503.

[0087] The GI removal / FFT unit 503 performs GI removal and FFT on the output signal of the tuner 501 , and outputs the obtained OFDM frame to the OFDM frame synchronization unit 505 .

[0088] The OFDM frame synchronization unit 505 outputs the OFDM frame output from the GI removal and FFT unit 503 to the TMCC demodulation unit 507 , pilot extraction unit 509 and LLch demodulation and error correction decoding unit 517 .

[0089] The TMCC demodulation unit 507 demodulates the TMCC signal allocated to the TMCC carrier from the OFDM frame output from the OFDM frame synchronization unit 505, and acquires the TMCC information included in the TMCC signal. The TMCC demodulation unit 507 outputs the acquired TMCC information to the CB transmission discrimination unit 520. Furthermore, the TMCC demodulation unit 507 instructs the pilot extraction unit 509 of the position of the pilot carrier to which the pilot signal is allocated, based on the extracted TMCC information.

[0090] The pilot extraction unit 509 extracts pilot signals arranged on pilot carriers specified by the TMCC demodulation unit 507 from the OFDM frame output from the OFDM frame synchronization unit 505. The pilot extraction unit 509 outputs the extracted pilot signals to a channel estimation unit 511. The pilot extraction unit 509 also outputs the OFDM frame input from the OFDM frame synchronization unit 505 to a waveform equalization unit 513.

[0091] The channel estimation unit 511 performs channel estimation using the pilot signal output from the pilot extraction unit 509 , and outputs the estimated value to the waveform equalization unit 513 .

[0092] Based on the estimated value output from the channel estimation unit 511, the waveform equalization unit 513 corrects (equalizes) the signal distortion generated in the transmission path for the OFDM frame output from the pilot extraction unit 509, and outputs the equalized signal to the time-frequency deinterleaving unit 515.

[0093] The time-frequency deinterleaving unit 515 performs deinterleaving on the output signal of the waveform equalization unit 513 in a manner opposite to the interleaving performed by the time-frequency interleaving unit 214 of the modulation device 20. As described above, in this embodiment, the data signal of layer A is assigned only to the primary channel. Therefore, the data signal of layer A can be demodulated using only the output signal of the waveform equalization unit 513. Therefore, the time-frequency deinterleaving unit 515 outputs the data signal of layer A to the LLR calculation and error correction decoding unit 519. On the other hand, since the data signals of other layers are distributed between the primary channel and the secondary channel, the data signals of other layers cannot be demodulated using only the output signal of the waveform equalization unit 513. Therefore, the time-frequency deinterleaving unit 515 outputs the data signals of layers other than layer A to the combining unit 523.

[0094] The LLch demodulation and error correction decoding unit 517 extracts the carrier on which the LLch data is allocated from the OFDM frame output from the OFDM frame synchronization unit 505, and demodulates the LLch data. The LLch demodulation and error correction decoding unit 517 performs error correction decoding on the demodulated signal to obtain the LLch data signal. As described with reference to FIG. 1, when CB transmission is performed, a CB TLV-SI packet is multiplexed onto the LLch data. The LLch demodulation and error correction decoding unit 517 obtains the LLch data signal and the CB control information multiplexed onto the LLch data signal. The LLch demodulation and error correction decoding unit 517 outputs the obtained LLch data signal to the output unit 525, and outputs the obtained CB control information to the secondary channel discrimination unit 521.

[0095] The LLR calculation and error correction decoding unit 519 calculates an LLR (Log Likelihood Ratio) for each bit of the output signal of the time-frequency deinterleaving unit 515, and performs error correction decoding on the output signal of the time-frequency deinterleaving unit 515 using the calculated LLR to obtain a data signal of layer A. The LLR calculation and error correction decoding unit 519 outputs the obtained data signal of layer A to the outside.

[0096] In the demodulation device 50 shown in Fig. 10, the data signal for layer A can be acquired only from the signal received via the primary channel. Therefore, the data signal for layer A may be multiplexed with CB TLV-SI. In this case, the LLR calculation and error correction decoding unit 519 may acquire the CB TLV-SI (CB control information) multiplexed on the data signal for layer A, and output it to the secondary channel discrimination unit 521. Therefore, the demodulation device 50 shown in Fig. 10 can acquire the CB control information by only receiving a signal on one physical channel.

[0097] The operations of the tuner 502, GI removal and FFT unit 504, OFDM frame synchronization unit 506, TMCC demodulation unit 508, pilot extraction unit 510, channel estimation unit 512, waveform equalization unit 514, time-frequency deinterleaving unit 516, and LLch demodulation and error correction decoding unit 518 are similar to the operations of the tuner 501, GI removal and FFT unit 503, OFDM frame synchronization unit 505, TMCC demodulation unit 507, pilot extraction unit 509, channel estimation unit 511, waveform equalization unit 513, time-frequency deinterleaving unit 515, and LLch demodulation and error correction decoding unit 517, except that the processing target is the received signal of the receiver 40s, and therefore description thereof will be omitted. However, the TMCC demodulation unit 508 does not output the extracted TMCC information to the CB transmission discrimination unit 520. Furthermore, the time-frequency deinterleaving unit 516 and the LLch demodulation and error correction decoding unit 518 do not output CB control information to the secondary channel discrimination unit 521 .

[0098] The CB transmission discrimination unit 520 refers to the CB flag included in the TMCC information output from the TMCC demodulation unit 507, determines whether or not CB transmission is being performed on the physical channel received via the tuner 501, and outputs the determination result to the secondary channel discrimination unit 521. The CB transmission discrimination unit 520, for example, scans the frequency bands of all physical channels and determines whether or not CB transmission is being performed on each physical channel during an initial scan to detect receivable channels by referring to the CB flag superimposed on the TMCC information. In this way, in the present embodiment, by superimposing the CB flag indicating whether or not CB transmission is being performed on the TMCC information, the CB transmission discrimination unit 520 can determine whether or not CB transmission is being performed without demodulating the data signal of each layer or the data signal of the LL channel.

[0099] When the CB transmission discrimination unit 520 determines that CB transmission is being performed, after the initial scan is completed, the secondary channel discrimination unit 521 acquires frequency information of the physical channel received by the tuner 501 and the physical channels constituting the CB transmission. Specifically, the secondary channel discrimination unit 521 references the CB control information output from at least one of the LLR calculation and error correction decoding unit 519 and the LL channel demodulation and error correction decoding unit 517, and acquires frequency information of the two physical channels that form a pair constituting the CB transmission.

[0100] When CB transmission is performed on a physical channel on which broadcast waves are received by tuner 501, secondary channel discrimination unit 521 activates tuner 502 and tunes the reception frequency of tuner 502 to the frequency of the physical channel paired with the physical channel received by tuner 501. In this way, it is possible to receive broadcast waves transmitted on both the primary channel and the secondary channel.

[0101] However, in this embodiment, data signals in layer A are transmitted only through the primary channel and not through the secondary channel. Therefore, when receiving only data signals in layer A, even if CB transmission is being performed, there is no need to activate tuner 502 to receive broadcast waves transmitted through the secondary channel. Therefore, when receiving data signals in a specific layer (layer A), secondary channel discrimination unit 521 activates tuner 501 to receive only signals transmitted through the primary channel. Furthermore, when receiving data signals in layers other than the specific layer (layers B and C), secondary channel discrimination unit 521 activates tuner 501 to receive signals transmitted through the primary channel and activates tuner 502 to receive signals transmitted through the secondary channel. In this way, when receiving data signals in layer A, even if CB transmission is being performed, it is only necessary to activate tuner 501, thereby achieving power saving.

[0102] Furthermore, when CB transmission is performed on a physical channel on which broadcast waves are received by tuner 501, secondary channel discrimination unit 521 causes P / S synchronization unit 522 to synchronize OFDM frame synchronization unit 505 with OFDM frame synchronization unit 506. As described above, broadcast waves are emitted at the same timing for the primary channel and secondary channel. By synchronizing OFDM frame synchronization unit 505 with OFDM frame synchronization unit 506, it is possible to match the demodulation timing for the primary channel and secondary channel.

[0103] The combiner 523 combines the output signals of the time-frequency deinterleaving units 515 and 516 by performing processing opposite to that of the system separators 205 and 206 of the modulation device 20 , and outputs the combined signal to the LLR calculator and error correction decoder 524 .

[0104] The LLR calculation and error correction decoding unit 524 calculates an LLR for each bit of the output signal of the combining unit 523, and uses the calculated LLR to perform error correction decoding on the output signal of the combining unit 523, thereby obtaining data signals (segment configuration data and adjustment band data) for each layer (layer B and layer C). The LLR calculation and error correction decoding unit 524 outputs the obtained data signals for each layer to the output unit 525.

[0105] The output unit 525 outputs the data signals of the B and C layers output from the LLR calculation and error correction decoding unit 524 and the LL channel data signals output from the LL channel demodulation and error correction decoding units 517 and 518 .

[0106] Fig. 11 is a diagram showing another example of the configuration of a demodulation device 50. The demodulation device 50 shown in Fig. 11 demodulates a signal received by a receiver 40 from a broadcast wave modulated by the modulation device 20 shown in Fig. 4 and transmitted via a transmitter 30. In Fig. 11, the same components as those in Fig. 10 are given the same reference numerals, and description thereof will be omitted.

[0107] The demodulation device 50 shown in FIG. 11 differs from the demodulation device 50 shown in FIG. 10 in the arrangement of the combiner 523.

[0108] In FIG. 11, the waveform equalizer 513 outputs the data signal of layer A obtained from the equalized signal to the time-frequency deinterleaving unit 515, and outputs the data signals of layers B and C to the combiner 523.

[0109] The combiner 523 combines the data signals of layers B and C output from the waveform equalizers 513 and 514 for each layer, and outputs the combined signal to the time-frequency deinterleaving unit 516. The time-frequency deinterleaving unit 516 performs deinterleaving on the output signal of the combiner 523 in a manner opposite to the interleaving performed by the time-frequency interleaving unit 240 of the modulation device 20, and outputs the result to the LLR calculation and error correction decoding unit 524. The LLR calculation and error correction decoding unit 524 calculates an LLR for each bit of the output signal of the time-frequency deinterleaving unit 516, and performs error correction decoding on the output signal of the time-frequency deinterleaving unit 516 using the calculated LLR to obtain the data signals of layers B and C (segment configuration data and bandwidth adjustment data). The LLR calculation and error correction decoding unit 524 outputs the obtained data signals of layers B and C to the output unit 525.

[0110] As described above, in this embodiment, the modulation device 20 serving as a transmitting device includes a system separation unit 220 (system separation units 205a, 205b, 205c) and OFDM frame configuration units 216 and 217 serving as sending units. The system separation unit 220 allocates data signals of a specific layer among multiple layers to a system corresponding to one of multiple physical channels, and allocates data signals of layers other than the specific layer to systems corresponding to the multiple physical channels. The OFDM frame configuration units 216 and 217 assign the data signals allocated for each system by the system separation unit 220 to segments and adjustment bands constituting the physical channels corresponding to each system, and send them out. The system separation unit 220 includes a segment configuration data separation unit 223 serving as a first separation unit, and an adjustment band data separation unit 224 serving as a second separation unit. The segment configuration data separation unit 223 allocates segment configuration data of other layers to systems corresponding to the multiple physical channels, depending on the number of segments to which segment configuration data of other layers can be allocated in each of the multiple physical channels. The adjustment band data separation unit 224 allocates the adjustment band data of other layers to the systems corresponding to each of the multiple physical channels. The OFDM frame configuration units 216 and 217 allocate the data signal of a specific layer allocated to the system corresponding to one physical channel to one or more inner segments of the multiple segments constituting the one physical channel, and allocate the segment configuration data of other layers allocated to the systems corresponding to each of the multiple physical channels to the remaining segments of the one physical channel and to segments constituting physical channels other than the one physical channel. Furthermore, the OFDM frame configuration units 216 and 217 allocate the adjustment band data of other layers allocated to the systems corresponding to each of the multiple physical channels to the adjustment bands constituting each of the multiple physical channels.

[0111] This allows the segment configuration data and the adjustment band data to be separated into a system corresponding to the primary channel and a system corresponding to the secondary channel according to the band in which the segment configuration data and the adjustment band data can be transmitted on each physical channel. Therefore, when hierarchical transmission and CB transmission are used together in the compatibility mode of the advanced system, system separation including the adjustment band becomes possible.

[0112] In Figure 3, an example has been described in which the mapping unit 204 corresponding to layer B generates carrier symbols (segment configuration data) to be transmitted in a total of 62 segments (29 segments for the primary channel and 33 segments for the secondary channel) on the primary channel and secondary channel assigned to the transmission of data signals on layer B, and then generates carrier symbols (adjustment band data) to be transmitted in the adjustment bands of the primary channel and secondary channel, but this is not limited to this.

[0113] As shown in Figure 12, the mapping unit 204 corresponding to layer B may generate carrier symbols in the following order: 29 segments of carrier symbols (segment configuration data) capable of transmitting layer B data signals on the primary ch, carrier symbols (adjustment band data) to be transmitted in the adjustment band of the primary ch, 33 segments of carrier symbols (segment configuration data) capable of transmitting layer B data signals on the secondary ch, and carrier symbols (adjustment band data) to be transmitted in the adjustment band of the secondary ch.

[0114] In this case, the system demultiplexer 205b outputs 29 segments of carrier symbols and the subsequent carrier symbols to be transmitted in the adjustment band of the primary ch to the hierarchical combiner 212. In addition, the system demultiplexer 205b outputs 33 segments of carrier symbols and the subsequent carrier symbols to be transmitted in the adjustment band of the secondary ch to the hierarchical combiner 213.

[0115] In the above-described embodiment, an example has been described in which the data signal of layer A is not transmitted via CB but is transmitted using only four segments of the primary channel, and the data signals of layers B and C are transmitted via CB, but this is not limiting. For example, there is a case in which the data signal of layer A is transmitted using more than 33 segments, and the data signal of layer B is transmitted using the remaining segments. Below, with reference to Figure 13, the operation of modulation device 20 as a transmitting device in such a case will be described using an example in which the data signal of layer A is transmitted using 42 segments and the data signal of layer B is transmitted using 24 segments.

[0116] 13, the mapping unit 204 corresponding to layer A generates carrier symbols for 42 segments of segment configuration data of layer A and carrier symbols for adjustment band data of layer A. Furthermore, the mapping unit 204 corresponding to layer B generates carrier symbols for 24 segments of segment configuration data of layer B and carrier symbols for adjustment band data of layer B.

[0117] The demultiplexing unit 205a divides the 42 segments of carrier symbols generated by the mapping unit 204 corresponding to layer A into 33 segments of carrier symbols and 9 segments of carrier symbols, as shown in Fig. 13. The demultiplexing unit 205a outputs the 33 segments of carrier symbols (segment configuration data) and the carrier symbols of the adjustment band data of layer A to the layer combining unit 212 corresponding to the primary channel, and outputs the 9 segments of carrier symbols to the layer combining unit 213 corresponding to the secondary channel.

[0118] Since the data signal of layer B is not transmitted via CB, the system separation unit 205b outputs the carrier symbols (segment configuration data and adjustment band data) generated by the mapping unit 204 corresponding to layer B to the layer combination unit 213 corresponding to the secondary channel.

[0119] The hierarchical combining unit 212 combines (hierarchically combines) the carrier symbols output from the demultiplexing units 205 corresponding to each layer. However, in the example shown in Fig. 13, only the carrier symbols of layer A are input to the hierarchical combining unit 121, so hierarchical combining by the hierarchical combining unit 212 is not necessary. As shown in Fig. 13, the hierarchical combining unit 213 combines (hierarchically combines) the carrier symbols for nine segments output from the demultiplexing unit 205a (segment configuration data of layer A) and the carrier symbols output from the demultiplexing unit 205b (segment configuration data and adjustment band data of layer B).

[0120] The time-frequency interleaving unit 214 divides (band division) the carrier symbols after hierarchical combining by the hierarchical combining unit 212 into a band for 33 segments including the carrier symbols of the segment configuration data of hierarchical layer A and a band for the adjustment band. The time-frequency interleaving unit 214 performs interleaving in the time direction and frequency direction (time-frequency IL) for each divided band, and combines (band combination) the interleaved carrier symbols.

[0121] The time-frequency interleaving unit 215 divides (band division) the carrier symbols after hierarchical combining by the hierarchical combining unit 213 into a band of 9 segments including carrier symbols of segment configuration data of hierarchical layer A, a band of 24 segments including carrier symbols of segment configuration data of hierarchical layer B, and a band of the adjustment band. The time-frequency interleaving unit 215 performs interleaving in the time direction and frequency direction (time-frequency IL) for each divided band, and combines (band combination) the interleaved carrier symbols.

[0122] The OFDM frame construction unit 216 constructs (OFDM framing) an OFDM frame from the carrier symbols interleaved by the time-frequency interleaving unit 214, in which carrier symbols of the segment construction data of layer A are assigned to the 33 segments that make up the primary channel, and carrier symbols of the adjustment band data of layer A are assigned to the adjustment bands adjacent to both sides of the 33 segments, as shown in Figure 13.

[0123] The OFDM frame construction unit 217 constructs (OFDM frames) an OFDM frame from the carrier symbols interleaved by the time-frequency interleaving unit 215, as shown in Figure 13, in which of the 33 segments that make up the secondary channel, carrier symbols of layer A segment construction data are assigned to the central 9 segments, carrier symbols of layer B segment construction data are assigned to the remaining 24 segments, and carrier symbols of layer B adjustment band data are assigned to the adjustment bands adjacent to both sides of the 33 segments.

[0124] 13, the system separation unit 205 (system separation unit 220) may allocate a data signal of a specific layer (layer B) among multiple layers to a system corresponding to one physical channel (secondary channel) among multiple physical channels, and may allocate data signals of other layers (layer A) than the specific layer to systems corresponding to each of the multiple physical channels. The OFDM frame configuration units 216 and 217 as transmitters may assign the data signals allocated for each system to segments and adjustment bands constituting the physical channels corresponding to each system, and transmit them.

[0125] The system separation unit 205 (system separation unit 220) includes a segment configuration data separation unit 223 as a first separation unit, and an adjustment band data separation unit 224. The segment configuration data separation unit 223 may allocate segment configuration data of other layers to systems corresponding to each of multiple physical channels according to the number of segments to which the segment configuration data of other layers can be assigned in each of the multiple physical channels. The adjustment band data separation unit 224 may allocate adjustment band data of a specific layer to a system corresponding to one physical channel, and allocate adjustment band data of other layers to systems corresponding to physical channels other than the one physical channel.

[0126] The OFDM frame construction units 216, 217 may assign a data signal of a specific layer allocated by the segment configuration data separation unit 223 to a system corresponding to one physical channel to one or more outer segments among the multiple segments that make up the one physical channel, and may assign segment configuration data of other layers allocated by the segment configuration data separation unit 223 to systems corresponding to each of the multiple channels to the remaining segments of the one physical channel and to segments that make up physical channels other than the one physical channel.

[0127] Furthermore, the OFDM frame construction units 216 and 217 may assign adjustment band data of a specific layer assigned by the adjustment band data separation unit 224 to a system corresponding to one physical channel to the adjustment band constituting one physical channel, and may assign adjustment band data of another layer assigned by the adjustment band data separation unit 224 to a system corresponding to a physical channel other than the one physical channel to the adjustment band constituting a physical channel other than the one physical channel.

[0128] Note that the separation of the carrier symbols of the segment configuration data of layer A by the separation unit 205a is not limited to the method of separating into carrier symbols for the first 33 segments and carrier symbols for the remaining 9 segments, as described with reference to Fig. 13. Fig. 14 is a diagram showing another example of separation by the separation unit 205a.

[0129] As shown in FIG. 14, the system separation unit 205a may divide the segment configuration data of the A hierarchical layer into predetermined units and allocate them to systems corresponding to the primary ch and secondary ch, respectively, and allocate the adjustment bandwidth data of the A hierarchical layer to the system corresponding to the primary ch.

[0130] The system separation by the system separation unit 205a shown in Fig. 14 will be described in more detail with reference to Fig. 15. In Fig. 15, the number of data carriers per segment is N, and the number of data carriers in the adjustment band is n. Also in Fig. 15, the number of segments to which segment configuration data of layer A can be assigned in the primary channel is X, and the number of segments to which segment configuration data of layer A can be assigned in the secondary channel is Y. In this case, the number of data carriers of the segment configuration data of layer A is (X+Y)×N.

[0131] The system separation unit 205a allocates the segment configuration data of layer A, from the beginning, to the systems corresponding to the primary ch and the secondary ch in data carrier units according to the number of segments to which the segment configuration data of layer A can be allocated in each of the primary ch and the secondary ch. That is, as shown in Fig. 15, the segment configuration data of layer A is allocated alternately from the beginning to the systems corresponding to the primary ch and the secondary ch in units of Y data carriers (data carriers from 0 to Y-1) which is the same number of segments to which the segment configuration data of layer A can be allocated in the secondary ch and X data carriers (data carriers from 0 to X-1) which is the same number of segments to which the segment configuration data of layer A can be allocated in the primary ch.

[0132] Furthermore, the system separation unit 205a allocates the data carriers of the adjusted band data to the system corresponding to the primary channel, as shown in FIG.

[0133] In this way, the system separation unit 205a can allocate the segment configuration data of layer A according to the number of segments that can transmit the data signal of layer A in each of the primary channel and the secondary channel. Also, the system separation unit 205 can allocate the adjustment band data of layer A to the system corresponding to the primary channel.

[0134] As described above, the hierarchical layers to be transmitted via CB are different in the examples shown in Figures 3, 5, and 12 and the example shown in Figure 14. The operations of the system separation units 205, 220 (the segment configuration data separation unit 223 and the adjustment band data separation unit 224) and the OFDM frame construction units 216, 217 as transmitters in these two examples can be summarized as follows: The segment configuration data separation unit 223 allocates the segment configuration data of each of the multiple hierarchical layers to the systems corresponding to each of the multiple physical channels according to the number of segments to which the segment configuration data of each of the multiple hierarchical layers can be allocated in each of the multiple physical channels. Furthermore, the adjustment band data separation unit 224 allocates the adjustment band data of a layer in which segment configuration data is allocated to one or more outermost segments among the multiple segments constituting a physical channel to the system corresponding to that physical channel.

[0135] In addition, the OFDM frame construction units 216 and 217 assign, for each of the multiple physical channels, adjustment band data of a layer in which segment construction data is assigned to one or more segments from the outside among the multiple segments that make up that physical channel, to the adjustment band that makes up that physical channel.

[0136] This allows the segment configuration data and the adjustment band data to be separated into a system corresponding to the primary channel and a system corresponding to the secondary channel according to the band in which the segment configuration data and the adjustment band data can be transmitted on each physical channel. Therefore, when hierarchical transmission and CB transmission are used together in the compatibility mode of the advanced system, system separation including the adjustment band becomes possible.

[0137] Although not specifically mentioned in the embodiments, a program that causes a computer to function as the modulation device 20 may be provided. The program may also be recorded on a computer-readable medium. The computer-readable medium can be used to install the program on a computer. Here, the computer-readable medium on which the program is recorded may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, and may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

[0138] Alternatively, a chip may be provided that is mounted on the modulation device 20 and is configured with a memory that stores programs for executing each process performed by the modulation device 20 and a processor that executes the programs stored in the memory.

[0139] Although the above-described embodiments have been described as typical examples, it will be apparent to those skilled in the art that many modifications and substitutions are possible within the spirit and scope of the present invention. Therefore, the present invention should not be interpreted as being limited by the above-described embodiments, and various modifications and changes are possible without departing from the scope of the claims. For example, multiple building blocks shown in the block diagrams of the embodiments can be combined into one, or one building block can be divided. [Explanation of symbols]

[0140] 1. Transmission and reception system 10 Remultiplexer 20 Modulator 30p, 30s transmitter 40p, 40s receiver 50 Demodulator 201 Input I / F section 202 Error correction coding unit 203 Bit Interleave 204 Mapping Department 205a,205b,205c,220 System separation section 207 Pilot signal generator 208 Primary channel TMCC information bit generator 209 Secondary channel TMCC information bit generator 210 Primary channel TMCC signal generation unit 211 Secondary channel TMCC signal generation unit 212, 213, 230 Layer synthesis section 214, 215, 240 Time-frequency interleaving section 216,217 OFDM frame configuration section 218,219 IFFT·GI Addition Section 221 Switching control unit 222 Switching section 223 Segment configuration data separation unit (first separation unit) 224 Adjustment band data separation unit (second separation unit) 501,502 tuner 503,504 GI removal / FFT section 505,506 OFDM frame synchronization section 507,508 TMCC demodulation unit 509,510 Pilot Extraction Unit 511,512 Channel Estimation Unit 513,514 Waveform equalization section 515,516 Time-frequency deinterleaving unit 517,518 LLch demodulation and error correction decoding section 519,524 LLR calculation and error correction decoding unit 520 CB transmission discrimination unit 521 Secondary channel discrimination unit 522 P / S synchronization section 523 Synthesis Section 525 Output Section

Claims

1. A transmitting device that transmits data signals of multiple layers with different transmission tolerances by channel bonding transmission that combines multiple physical channels, comprising: Each of the plurality of physical channels is composed of a plurality of segments and adjustment bands adjacent to both sides of a band composed of the plurality of segments; a system separation unit that allocates a data signal of a specific layer among the plurality of layers to a system corresponding to one of the plurality of physical channels, and allocates data signals of other layers other than the specific layer to systems corresponding to each of the plurality of physical channels; a transmission unit that allocates the data signals allocated to each system by the system separation unit to the segments and the adjustment band that constitute the physical channels corresponding to each system, and transmits the data signals; the data signal of the other layer includes segment configuration data transmitted in the plurality of segments and adjustment band data transmitted in the adjustment band; The system separation unit a first demultiplexer that allocates the data signal of the specific layer to a system corresponding to the one physical channel, and allocates the segment configuration data of the other layers to systems corresponding to each of the plurality of physical channels in accordance with the number of segments to which the segment configuration data of the other layers can be assigned in each of the plurality of physical channels; a second demultiplexer that allocates the adjusted bandwidth data of the other layers to a system corresponding to each of the plurality of physical channels; The sending unit assigning the data signal of the specific layer allocated by the first demultiplexing unit to a system corresponding to the one physical channel to one or more inner segments among a plurality of segments constituting the one physical channel, and assigning the segment configuration data of the other layers allocated by the first demultiplexing unit to the systems corresponding to each of the plurality of physical channels to the remaining segments of the one physical channel and segments constituting physical channels other than the one physical channel; a transmitting device that allocates the adjustment band data of the other layers allocated by the second separating unit to the systems corresponding to each of the plurality of physical channels to an adjustment band that constitutes each of the plurality of physical channels.

2. 2. The transmitting device according to claim 1, the first demultiplexer allocates the segment configuration data to a system corresponding to each of the plurality of physical channels in segment units to which the segment configuration data of the other layer can be allocated in each of the plurality of physical channels; The second demultiplexer divides the adjustment band data into the number of physical channels and allocates the data to branches corresponding to the plurality of physical channels, respectively.

3. 2. The transmitting device according to claim 1, the first demultiplexer allocates the segment configuration data to a system corresponding to each of the plurality of physical channels in units of data carriers according to the number of segments to which the segment configuration data of the other layer can be allocated in each of the plurality of physical channels; The second demultiplexer sequentially allocates the adjusted band data of the other layers to systems corresponding to the plurality of physical channels, one data carrier at a time.

4. A transmitting device that transmits data signals of multiple layers with different transmission tolerances by channel bonding transmission that combines multiple physical channels, comprising: Each of the plurality of physical channels is composed of a plurality of segments and adjustment bands adjacent to both sides of a band composed of the plurality of segments; a system separation unit that allocates a data signal of a specific layer among the plurality of layers to a system corresponding to one of the plurality of physical channels, and allocates data signals of other layers other than the specific layer to systems corresponding to each of the plurality of physical channels; a transmission unit that allocates the data signals allocated to each system by the system separation unit to the segments and the adjustment band that constitute the physical channels corresponding to each system, and transmits the data signals; the data signal includes segment configuration data transmitted in the plurality of segments and adjustment band data transmitted in the adjustment band; The system separation unit a first demultiplexer that allocates the data signal of the specific layer to a system corresponding to the one physical channel, and allocates the segment configuration data of the other layers to systems corresponding to each of the plurality of physical channels in accordance with the number of segments to which the segment configuration data of the other layers can be assigned in each of the plurality of physical channels; a second demultiplexer that allocates the adjusted band data of the specific layer to a system corresponding to the one physical channel and allocates the adjusted band data of the other layers to systems corresponding to physical channels other than the one physical channel; The sending unit assigning the data signal of the specific layer allocated by the first demultiplexing unit to one or more segments from the outside of a plurality of segments constituting the one physical channel, and assigning the segment configuration data of the other layers allocated by the first demultiplexing unit to the groups corresponding to each of the plurality of physical channels to the remaining segments of the one physical channel and segments constituting physical channels other than the one physical channel; A transmitting device that assigns the adjustment band data of the specific layer allocated by the second separation unit to a system corresponding to the one physical channel to an adjustment band that constitutes the one physical channel, and assigns the adjustment band data of the other layer allocated by the second separation unit to a system corresponding to a physical channel other than the one physical channel to an adjustment band that constitutes a physical channel other than the one physical channel.

5. A transmitting device that transmits data signals of multiple layers with different transmission tolerances by channel bonding transmission that combines multiple physical channels, comprising: Each of the plurality of physical channels is composed of a plurality of segments and adjustment bands adjacent to both sides of a band composed of the plurality of segments; a system separation unit that allocates a data signal of a specific layer among the plurality of layers to a system corresponding to one of the plurality of physical channels, and allocates data signals of other layers other than the specific layer to systems corresponding to each of the plurality of physical channels; a transmission unit that allocates the data signals allocated to each system by the system separation unit to the segments and the adjustment band that constitute the physical channels corresponding to each system, and transmits the data signals; the data signal includes segment configuration data transmitted in the plurality of segments and adjustment band data transmitted in the adjustment band; The system separation unit a first demultiplexer that allocates the segment configuration data of each of the plurality of layers to a system corresponding to each of the plurality of physical channels in accordance with the number of segments to which the segment configuration data of each of the plurality of layers can be allocated in each of the plurality of physical channels; a second demultiplexer that allocates the adjusted bandwidth data of a layer in which the segment configuration data is allocated to one or more outer segments of the plurality of segments that configure the physical channel, to a system corresponding to the physical channel; The sending unit A transmitting device that assigns, to each of the plurality of physical channels, adjustment band data of a layer in which the segment configuration data is assigned to one or more segments from the outside among the plurality of segments that constitute the physical channel, to the adjustment band that constitutes the physical channel.

6. A program that causes a computer to operate as the transmitting device according to any one of claims 1 to 5.

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