JP6938337B2 - Transmitter, receiver and chip - Google Patents

Description

The present invention relates to a transmitter, a receiver and a chip.

As the current terrestrial digital broadcasting transmission system in Japan, "ISDB-T (Integrated Services Digital Broadcasting-Terrestrial)" is used (see, for example, Non-Patent Document 1).

In ISDB-T, the frequency bands of a plurality of subchannels obtained by OFDM (Orthogonal Frequency Division Multiplexing) assigned to one broadcast wave (channel) are divided into 13 segments.

In ISDB-T, 12 of the 13 segments are used for transmission of non-partial reception band data (that is, high-definition broadcasting for fixed reception and multiple standard definition broadcasting), and the remaining 1 segment is used. It is used for transmission of partial reception band data (that is, broadcasting for mobile reception). Here, ISDB-T defines that non-partial reception band data and partial reception band data are simultaneously transmitted in the frequency bands of 13 segments.

Currently, a new next-generation terrestrial digital broadcasting transmission method that replaces the current terrestrial digital broadcasting transmission method is being studied.

In such a next-generation terrestrial digital broadcasting transmission system, 3D high-definition broadcasting replaces conventional high-definition broadcasting for a receiving device (that is, for fixed reception) that receives non-partial reception band data provided in a home or the like. Alternatively, it is required to provide services such as super high-definition broadcasting having 16 times the resolution of high-definition broadcasting. Similarly, in the next-generation terrestrial digital broadcasting transmission system, it is required to provide a high-definition broadcasting class service to a receiving device that receives partial reception band data (that is, for mobile reception). In the next-generation terrestrial digital broadcasting transmission system, it is necessary to simultaneously provide two services for fixed reception and mobile reception using one channel, which is the same as the current ISDB-T.

FIG. 10 (a) shows the segment structure of ISDB-T, FIG. 10 (b) shows the segment structure of the normal mode of the next-generation terrestrial digital broadcasting transmission system, and FIG. 10 (c) shows the next-generation segment structure. The segment structure of the compatible mode of the terrestrial digital broadcasting transmission system is shown, and FIG. 10D shows the segment structure of the extended mode of the next-generation terrestrial digital broadcasting transmission system.

As described above, in ISDB-T shown in FIG. 10A, one channel is composed of 13 segments and has a bandwidth of 5.57 MHz. In the normal mode shown in FIG. 10B, one channel is composed of 33 segments and has a bandwidth of 5.50 MHz. In the compatibility mode shown in FIG. 10 (c), one channel is composed of 33 segments and an adjustment band (0.07 MHz), and has the same bandwidth of 5.57 MHz as one channel of ISDB-T. .. In the extended mode shown in FIG. 10D, one channel is composed of 35 segments and has a bandwidth of 5.83 MHz.

Further, in the example shown in FIG. 10A, in one channel of ISDB-T, the central one segment is the partial reception band α, and the 12 segments arranged on both sides of the partial reception band are non-partial. The reception band β.

For the data set in the non-partial reception band β shown in FIG. 10A (that is, the non-partial reception band data), the frequency interleaving occurs in the 12 segments constituting the non-partial reception band β in the transmitting device. Be given.

On the other hand, for the data set in the partial reception band α (that is, the partial reception band data) shown in FIG. 10A, frequency interleaving is performed in one segment constituting the partial reception band α in the transmission device. Will be done.

ARIB STD-B31 "Transmission method for terrestrial digital television broadcasting"

However, at present, there is a problem that it is not specified what kind of frequency interleaving is appropriate for the next-generation terrestrial digital broadcasting transmission system in which the available bandwidth for ISDB-T is significantly increased. There was a point.

Therefore, the present invention has been made to solve the above-mentioned problems, and provides a transmitting device, a receiving device, and a chip capable of performing appropriate frequency interleaving in a next-generation terrestrial digital broadcasting transmission system. The purpose.

The first feature of the present invention is a transmission device configured to transmit first layer data and second layer data by an OFDM signal, and each of the first layer data and the second layer data can be transmitted. The inter-layer inter-segment interleaving unit configured to perform frequency interleaving on a data carrier basis in all the constituent segments, the first layer data to which frequency interleaving is performed by the inter-layer inter-segment interleaving unit, and the said Frequency interleaving is performed on the partial reception band data and the non-partial reception band data and the separation / synthesis unit configured to generate the partial reception band data and the non-partial reception band data from the second layer data. The frequency interleaving unit configured in the above, and the transmitting unit configured to transmit the OFDM signal including the partial reception band data and the non-partial reception band data subjected to frequency interleaving by the frequency interleaving unit. The frequency interleaving unit is provided with frequency interleaving in units of segments constituting the partial reception band data based on the SP pattern of the first layer data and the SP pattern of the second layer data. Alternatively, it is configured to perform frequency interleaving on a data carrier basis in all the segments constituting the partial reception band data, and the frequency interleaving unit is configured in all the segments constituting the non-partial reception band data. The gist is that it is configured to perform frequency interleaving on a data carrier basis.

The second feature of the present invention is a receiving device configured to receive the first layer data and the second layer data transmitted by the OFDM signal, and the partial reception band data and the non-reception band data are received from the OFDM signal. A band separation unit configured to acquire partial reception band data, a frequency deinterleaving unit configured to apply frequency deinterleave to the partial reception band data and the non-partial reception band data, and the like. A composite separation unit configured to acquire the first layer data and the second layer data from the partial reception band data and the non-partial reception band data that have been frequency deinterleaved by the frequency deinterleaved unit. And an inter-layer deinterleaving unit configured to perform frequency deinterleaving for each data carrier in all the segments constituting each of the first layer data and the second layer data. The frequency deinterleaving unit either performs frequency deinterleaving in units of segments constituting the partial reception band data based on the SP pattern of the first layer data and the SP pattern of the second layer data. It is configured to perform frequency deinterleaving for each data carrier in all the segments constituting the partial reception band data, and the frequency deinterleaving portion is configured in all the segments constituting the non-partial reception band data. The gist is that it is configured to perform frequency deinterleaving on a data carrier basis.

A third feature of the present invention is a chip composed of a processor that executes a program for operating a computer as a transmitter according to the first feature described above.

A fourth feature of the present invention is a chip composed of a processor that executes a program for operating a computer as a receiving device according to the second feature described above.

According to the present invention, it is possible to provide a transmitting device, a receiving device and a chip capable of performing appropriate frequency interleaving in a next-generation terrestrial digital broadcasting transmission system.

FIG. 1 is an example of a configuration diagram of the transmission device 1 according to the first embodiment. FIG. 2 is a diagram showing an example of the segment structure of the next-generation terrestrial digital broadcasting transmission system. FIG. 3 is a diagram for explaining an example of the functions of the inter-layer intersegment interleaving units 15a and 15b of the transmission device 1 according to the first embodiment. FIG. 4 is an example of a configuration diagram of the frequency interleaving unit 17 of the transmission device 1 according to the first embodiment. FIG. 5 is a diagram for explaining an example of the function of the inter-layer segment unit interleaving unit 171 of the frequency interleaving unit 17 of the transmitting device 1 according to the first embodiment. FIG. 6 is an example of a configuration diagram of the intra-segment interleaving units 174 and 175 of the frequency interleaving unit 17 of the transmission device 1 according to the first embodiment. FIG. 7 is a diagram for explaining an example of the function of the intra-segment intersegment carrier rotation unit 1701 of the intra-segment inter-segment unit 174 and 175 of the frequency interleaving unit 17 of the transmission device 1 according to the first embodiment. FIG. 8 is an example of a configuration diagram of the receiving device 3 according to the first embodiment. FIG. 9 is an example of a configuration diagram of the frequency deinterleaved portion 35 of the receiving device 3 according to the first embodiment. FIG. 10 is a diagram showing an example of the segment structure of ISDB-T and the segment structure of the next-generation terrestrial digital broadcasting transmission system.

(First Embodiment)
Hereinafter, the broadcasting system according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 9. The broadcasting system according to the present embodiment is configured to correspond to the above-mentioned next-generation terrestrial digital broadcasting transmission system, and includes, for example, a transmitting device 1 shown in FIG. 1 and a receiving device 3 shown in FIG.

In this embodiment, the segment structure of the normal mode of the next-generation terrestrial digital broadcasting transmission system shown in FIG. 2A or the compatibility mode of the next-generation terrestrial digital broadcasting transmission system shown in FIG. 2B is used. do.

The transmission device 1 according to the present embodiment is configured to perform hierarchical transmission up to two layers. Specifically, the transmission device 1 according to the present embodiment is configured to be capable of transmitting A-layer data and B-layer data. For example, it is assumed that the A-layer data is broadcasting data for mobile reception, and the B-layer data is broadcasting data for fixed reception.

The transmission device 1 according to the present embodiment is configured to transmit the A-layer data and the B-layer data by an OFDM signal including the above-mentioned partial reception band data and non-partial reception band data.

As shown in FIG. 1, the transmission device 1 according to the present embodiment includes mapping units 11a and 11b, level adjustment units 12a and 12b, a hierarchical synthesis unit 13, a time interleaving unit 14, and an inter-layer intersegment interleaving unit. It includes 15a and 15b, a separation / synthesis unit 16, a frequency interleaving unit 17, a band synthesis unit 18, an OFDM frame configuration unit 19, an IFFT unit 20, and a transmission unit 21.

The mapping unit 11a is configured to map the A layer data (first layer data) to the data carrier, and the mapping unit 11b is configured to map the B layer data (second layer data) to the data carrier. Has been done.

The level adjustment unit 12a is configured to adjust the level of the data carrier (hereinafter referred to as A layer data) to which the A layer data is mapped, and the level adjustment unit 12b is configured to adjust the level of the B layer data to which the B layer data is mapped. It is configured to adjust the level of the existing data carrier (hereinafter referred to as B layer data).

The hierarchical composition unit 13 is configured to synthesize the A layer data and the B layer data. Here, when the segment structure of the compatibility mode shown in FIG. 2B is used, the hierarchical synthesis unit 13 separates the data carriers (hereinafter referred to as adjustment band data) arranged in the adjustment band γ and separates them. It is configured to transmit to the band synthesis unit 18. It is assumed that the B layer data is mapped to the adjustment band γ.

In the normal mode segment structure shown in FIG. 2A, the central nine segments are the partial reception band α in one channel, and the 24 segments arranged on both sides of the partial reception band α. Is the non-partial reception band β.

Further, in the segment structure of the compatibility mode shown in FIG. 2B, the central nine segments are the partial reception band α in one channel, and the 24 segments arranged on both outer sides of the partial reception band α. The segment is the non-partial reception band β, and the adjustment band γ is arranged on both outer sides of the non-partial reception band β.

On the other hand, in the segment structure of the extended mode shown in FIG. 10D, the central nine segments are the partial reception band α in one channel, and the 26 segments arranged on both outer sides of the partial reception band α. The segment is the non-partial reception band β.

Here, the hierarchical synthesis unit 13 may be configured to extract B-layer data (that is, a data carrier to which the B-layer data is mapped) at equal intervals in the frequency direction and use it as adjustment band data.

The time interleaving unit 14 is configured to perform time interleaving for each of the A layer data and the B layer data (in the case of the compatibility mode, the adjustment band data is also included).

The inter-segment inter-layer interleaving unit 15a in the hierarchy is configured to perform frequency interleaving on a data carrier basis in all the segments constituting the A-layer data.

Similarly, the inter-segment inter-layer interleaving unit 15b in the hierarchy is configured to perform frequency interleaving on a data carrier basis in all the segments constituting the B-layer data.

Here, with reference to FIGS. 3A and 3B, the frequency interleaving performed by the inter-segment inter-segment interleaving portions 15a and 15b in the hierarchy will be briefly described.

FIG. 3A shows an array of data carriers Si (i = 0 to nz-1) before such frequency interleaving, and FIG. 3B shows data carrier Si (i = 0 to nz-1) after such frequency interleaving. The sequence of -1) is shown.

Here, n indicates the number of segments of each hierarchical data (A layer data and B layer data), and z indicates the number of data carriers per segment. In addition, z is determined based on the SP (Scattered Pilot) interval. For example, if the FFT size is 8 kpoints, z is 174, 192, 201, and if the FFT size is 16 kpoints, z is 1276, 348, 384, 402, 411. If the FFT size is 32 kpoint, z is one of 552, 696, 768, 804, 822, 836, 838, 839.

For example, when the number of segments n of the A layer data is 7, the inter-segment interleaving unit 15a in the layer performs frequency interleaving on a data carrier basis in all the segments 0 to n-1 constituting the A layer data. _{The data carriers S 0 to} S ₁₂₁₇ to which the A hierarchical data is mapped are changed from the array shown in FIG. 3 (a) to the array shown in FIG. 3 (b). ..

The separation / synthesis unit 16 is configured to generate partial reception band data and non-partial reception band data from the A layer data and the B layer data.

Specifically, the separation / synthesizing unit 16 generates the partial reception band data by allocating the B layer data when there is a vacancy after allocating the A layer data to the partial reception band α composed of nine segments, and 24 It is configured to generate the non-partial reception band data by allocating the rest of the B layer data to the non-partial reception band β composed of the segments.

For example, when the A-layer data consists of less than 9 segments, the separation / synthesis unit 16 allocates the partial reception band α in order from the lowest segment number of the B-layer data, and the A-layer data and the B-layer data. May be configured to generate partial reception band data consisting of nine segments in total.

On the other hand, when the A-layer data is composed of nine segments, the separation / synthesis unit 16 may be configured so that the A-layer data is the partial reception band data and the B-layer data is the non-partial reception band data.

The frequency interleaving unit 17 is configured to apply a predetermined frequency interleaving to each of the partial reception band data and the non-partial reception band data.

Specifically, the frequency interleaving unit 17 performs frequency interleaving in units of segments constituting the partial reception band data based on the SP pattern of the A layer data and the SP pattern of the B layer data, or the partial reception band data. It may be configured to determine whether to apply frequency interleaving on a data carrier basis within all the segments constituting the data carrier. Here, the partial reception band data may include only the A layer data, or may include both the A layer data and the B layer.

According to such a configuration, it is considered that different SP patterns can be used because the receiving devices 3 that receive the A layer data (for example, for mobile reception) and the B layer data (for example, for fixed reception) are different. It is possible to support frequency interleaving in the terrestrial digital broadcasting transmission system of the generation.

For example, as shown in FIG. 4, the frequency interleaving unit 17 includes inter-layer segment unit interleaving units 171, inter-layer inter-segment interleaving units 172 and 173, and intra-segment inter-segment interleaving units 174 and 175.

The inter-layer segment unit interleaving unit 171 is configured to perform frequency interleaving in segment units constituting the partial reception band data. For example, the inter-layer segment unit interleaving unit 171 has a segment No. 1 that constitutes partial reception band data (partial reception band α). 0 to 8 are configured to be changed from the sequence shown in FIG. 5 (a) to the sequence shown in FIG. 5 (b).

Specifically, when the SP pattern of the A-layer data and the SP pattern of the B-layer data are different, the inter-layer segment unit interleaving unit 171 is configured to perform frequency interleaving in the segment units constituting the partial reception band data. You may be.

The inter-layer inter-segment interleaving unit 172 is configured to perform frequency interleaving on a data carrier basis in all the segments constituting the partial reception band data.

Specifically, when the SP pattern of the A-layer data and the SP pattern of the B-layer data are the same, the inter-layer inter-segment interleaving unit 172 frequency interleaves in data carrier units within all the segments constituting the partial reception band data. May be configured to apply.

The inter-layer inter-segment interleaving unit 173 is configured to perform frequency interleaving on a data carrier basis in all the segments constituting the non-partial reception band data. When the non-partial reception band data is composed of only the B layer data, the SP pattern of the A layer data and the SP pattern of the B layer data are the same.

The intra-segment interleave unit 174 is within the segment constituting the partial reception band data after the frequency interleaving is performed by the inter-layer segment unit interleaving unit 171 or after the frequency interleaving is performed by the inter-layer inter-segment interleaving unit 172. It is configured to perform carrier rotation and carrier randomization.

The intra-segment interleaving unit 175 is configured to perform carrier rotation and carrier randomization within the segment constituting the non-partial reception band data after frequency interleaving is performed by the inter-layer inter-segment interleaving unit 173.

For example, each of the intra-segment interleave units 174 and 175 includes an intra-segment carrier rotation unit 1701 and an intra-segment carrier randomization unit 1702, as shown in FIG.

The intra-segment carrier rotation unit 1701 is configured to perform carrier rotation within the segment constituting the above-mentioned frequency interleaved partial reception band data (or non-partial reception band data).

Specifically, segment carrier rotation section 1701, partial reception band data frequency interleaving is performed above (or non-partial reception band data) in a segment constituting the data carrier S _'0 ~S' _z It is configured to change _{the order of -1 in} the order of S' _{(k mod z) to} S' _{(k + z-1 mod z).} For example, when the number of data carriers z is 174, the intra-segment carrier rotation unit 1701 is the data in the segment k constituting the partial reception band data (or non-partial reception band data) subjected to the frequency interleaving described above. Carriers S _{0 to} S ₁₇₃ are configured to change from the sequence shown in FIG. 7 (a) to the sequence shown in FIG. 7 (b).

The intra-segment carrier randomization unit 1702 is configured to change the arrangement of the data carriers subjected to carrier rotation by the intra-segment carrier rotation unit 1701 within the above-mentioned segment (for example, segment k). For example, the intra-segment carrier randomization unit 1702 may be configured to randomly change the array of such data carriers in the above-mentioned segment (for example, segment k) based on a predetermined table.

According to this configuration, in the next-generation terrestrial digital broadcasting transmission system, while following the frequency interleaving in the one-segment reception of ISDB-T, which only implements carrier rotation and carrier randomization, the frequency interleaving of the previous stage should be additionally implemented. Therefore, it is possible to aim at improving the characteristics.

The band synthesis unit 18 is configured to synthesize partial reception band data and non-partial reception band data (in the case of compatibility mode, the adjustment band data is also included). For example, the band synthesizing unit 18 may be configured to arrange the partial reception band data in the central 9 segments in one channel and synthesize the partial reception band data and the non-partial reception band data.

The OFDM frame configuration unit 19 is configured to configure an OFDM frame according to the partial reception band data and the non-partial reception band data input from the band synthesis unit 18, and the OFDM unit 20 is configured as an OFDM frame configuration unit, respectively. It is configured to apply IFFT to the OFDM frame output from 19.

The transmission unit 21 is configured to transmit the OFDM signal output from the IFFT unit 20, respectively. That is, the transmission unit 21 is configured to transmit an OFDM signal including partial reception band data and non-partial reception band data (and adjustment band data in the case of compatibility mode).

The receiving device 3 according to the present embodiment is configured to be able to receive the A-layer data and the B-layer data transmitted by the layer transmission up to the second layer.

The receiving device 3 according to the present embodiment is configured to receive the A-layer data and the B-layer data by the OFDM signal including the above-mentioned partial reception band data and non-partial reception band data.

As shown in FIG. 8, the receiving device 3 according to the present embodiment includes a receiving unit 31, an FFT unit 32, a deframed unit 33, a band separation unit 34, a frequency deinterleaving unit 35, and a composite separation unit. 36, inter-segment deinterleaving units 37a and 37b in the hierarchy, time deinterleaving unit 38, layer separation unit 39, level adjusting units 40a and 40b, and demapping units 41a and 41b are provided.

The receiving unit 31 is configured to receive the OFDM signal transmitted by the transmitting device 1.

The FFT unit 32 is configured to perform an FFT on the OFDM signal received by the receiving unit 31.

The deframe unit 33 is configured to acquire composite data of partial reception band data and non-partial reception band data (and adjustment band data in the case of compatibility mode) based on the output from the FFT unit 32. There is.

The band separation unit 34 is configured to separate and acquire partial reception band data and non-partial reception band data (and adjustment band data in the case of compatibility mode) from the composite data output from the deframe unit 33. Has been done.

The frequency deinterleave unit 35 is configured to apply frequency deinterleave corresponding to the predetermined frequency interleave applied in the frequency interleave unit 17 described above to each of the partial reception band data and the non-partial reception band data. There is.

For example, as shown in FIG. 9, the frequency deinterleaved unit 35 includes intra-segment deinterleaved units 351 and 352, inter-layer segment unit de-interleaved units 353, and inter-layer inter-segment deinterleaved units 354 and 355. doing.

The intra-segment deinterleaving unit 351 is configured to perform the reverse processing of carrier rotation and carrier randomization performed by the intra-segment interleaving unit 174 within the segment constituting the partial reception band data.

The intra-segment deinterleaving unit 352 is configured to perform the reverse processing of carrier rotation and carrier randomization performed by the intra-segment interleaving unit 175 within the segment constituting the non-partial reception band data.

The inter-layer segment unit deinterleave unit 353 is configured to perform frequency deinterleave in units of segments constituting partial reception band data. Such frequency deinterleaving corresponds to the frequency interleaving performed by the inter-layer segment unit interleaving unit 171, that is, the reverse processing of such frequency interleaving.

Specifically, when the SP pattern of the A layer data and the SP pattern of the B layer data are different, the inter-layer segment unit deinterleave unit 353 performs frequency deinterleave in each segment constituting the partial reception band data. It may be configured.

The inter-layer inter-segment deinterleaving unit 354 is configured to perform frequency deinterleaving on a data carrier basis in all the segments constituting the partial reception band data. Such frequency deinterleaving corresponds to the frequency interleaving performed by the inter-layer inter-segment interleaving unit 172, that is, the reverse processing of such frequency interleaving.

Specifically, when the SP pattern of the A-layer data and the SP pattern of the B-layer data are the same, the inter-layer inter-segment deinterleave unit 354 has a frequency of each data carrier in all the segments constituting the partial reception band data. It may be configured to provide deinterleaving.

The inter-layer inter-segment deinterleaving unit 355 is configured to perform frequency deinterleaving on a data carrier basis in all the segments constituting the non-partial reception band data. Such frequency deinterleaving corresponds to the frequency interleaving performed by the inter-layer inter-segment interleaving unit 172, that is, the reverse processing of such frequency interleaving. When the non-partial reception band data is composed of only the B layer data, the SP pattern of the A layer data and the SP pattern of the B layer data are the same.

The composite separation unit 36 is configured to acquire A-layer data and B-layer data from the partial reception band data and the non-partial reception band data.

The inter-segment deinterleaving section 37a in the hierarchy is configured to perform frequency deinterleaving on a data carrier basis in all the segments constituting the A-layer data.

Similarly, the inter-segment deinterleaving section 37b in the hierarchy is configured to perform frequency deinterleaving on a data carrier basis in all the segments constituting the B-layer data.

The time deinterleave unit 38 is configured to perform time deinterleave on each of the A layer data and the B layer data (in the case of the compatibility mode, the adjustment band data is also included).

The layer separation unit 39 is configured to separate the A layer data and the B layer data. Here, when the segment structure of the compatibility mode shown in FIG. 2B is used, the layer separation unit 39 may be configured to extract the B layer data included in the adjustment band data. That is, the layer separation unit 39 is configured to insert the adjustment band data at equal intervals with respect to the B layer data output from the time deinterleave unit 38.

The level adjusting unit 40a is configured to adjust the level of the A layer data, and the level adjusting unit 40b is configured to adjust the level of the B layer data.

The demapping unit 41a is configured to demap the A-layer data from the data carrier, and the mapping unit 41b is configured to demap the B-layer data from the data carrier.

According to the broadcasting system according to the present embodiment, since the partial receiver of ISDB-T performs frequency interleaving only within one segment, the effect of frequency interleaving is low in a mobile reception environment for receiving by a mobile terminal or the like. Even if the number of segments in which A-layer data is transmitted is 3, it is possible to combine with 6 segments in which B-layer data is transmitted and perform wideband frequency interleaving of 9 segments, so mobile reception is possible. The effect of sufficient frequency interleaving can be exhibited even in the environment.

(Other embodiments)
As described above, the invention has been described by the embodiments described above, but the statements and drawings that form part of the disclosure in such embodiments should not be understood as limiting the invention. Such disclosure will reveal to those skilled in the art various alternative embodiments, examples and operational techniques.

In the above-described embodiment, a case where SISO (Single-Input Single-Output) by one transmitting / receiving antenna is applied is described, but the present invention is not limited to such a case. It can also be applied to cases where MIMO (Multi-Input Multi-Output) with a plurality of transmission / reception antennas is applied.

Further, in the above-described embodiment, the case where the layer transmission is performed up to two layers is described as an example, but the present invention is not limited to such a case, and the case where the layer transmission is performed up to three layers is also possible. Applicable.

Further, although not particularly mentioned in the above-described embodiment, a program for causing a computer to execute each process performed by the above-mentioned transmitting device 1 and receiving device 3 may be provided. The program may also be recorded on a computer readable medium. Computer-readable media can be used to install such programs on computers. Here, the computer-readable medium on which such a program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, but may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

Alternatively, a chip composed of a memory for storing a program for realizing at least a part of the functions in the transmission device 1 and the reception device 3 described above and a processor for executing the program stored in the memory may be provided. ..

1 ... Transmission device 11a, 11b ... Mapping unit 12a, 12b ... Level adjustment unit 13 ... Hierarchical synthesis unit 14 ... Time interleaving unit 15a, 15b ... Inter-segment interleaving unit 16 ... Separation synthesis unit 17 ... Frequency interleaving unit 171 ... Hierarchy Inter-segment unit interleave unit 172, 173 ... Inter-layer inter-segment interleave unit 174, 175 ... In-segment interleave unit 1701 ... In-segment carrier rotation unit 1702 ... In-segment carrier randomization unit 18 ... Band synthesis unit 19 ... OFDM frame configuration unit 20 ... IFFT section 21 ... Transmitting section 3 ... Receiver 31 ... Receiver section 32 ... FFT section 33 ... Deframed section 34 ... Band separation section 35 ... Frequency deinterleaving section 351 and 352 ... In-segment deinterleaving section 353 ... Inter-layer segment Deinterleaved sections 354, 355 ... Inter-layer inter-segment deinterleaved sections 36 ... Composite separation sections 37a, 37b ... Inter-layer inter-segment deinterleaved sections 38 ... Time deinterleaved sections 39 ... Hierarchical separation sections 40a, 40b ... Level adjustment sections 41a, 41b ... Demapping section

Claims (8)

A transmission device configured to transmit at least first layer data and second layer data by an OFDM signal.
An inter-layer inter-segment interleaving unit configured to perform frequency interleaving for each data carrier in all the segments constituting each of the first layer data and the second layer data.
A separation / synthesizing unit configured to generate partial reception band data and non-partial reception band data from the first layer data and the second layer data to which frequency interleaving is performed by the inter-segment interleaving unit in the layer. ,
A frequency interleaving unit configured to perform frequency interleaving on the partial reception band data and the non-partial reception band data, and a frequency interleaving unit.
It includes a transmission unit configured to transmit the OFDM signal including the partial reception band data and the non-partial reception band data that have been frequency interleaved by the frequency interleaving unit.
The frequency interleaving unit performs frequency interleaving in units of segments constituting the partial reception band data based on the SP pattern of the first layer data and the SP pattern of the second layer data, or the partial reception band. It is configured to perform frequency interleaving on a data carrier basis within all the segments that make up the data.
The frequency interleaving unit is a transmission device characterized in that frequency interleaving is performed on a data carrier basis in all segments constituting the non-partial reception band data. The frequency interleaving unit is characterized in that when the SP pattern of the first layer data and the SP pattern of the second layer data are different, frequency interleaving is performed in units of segments constituting the partial reception band data. The transmitting device according to claim 1. The frequency interleaving unit is subjected to frequency interleaving in units of segments constituting the partial reception band data, or after frequency interleaving is performed in units of data carriers in all segments constituting the partial reception band data. The transmission device according to claim 1 or 2, wherein carrier rotation and carrier randomization are performed within the segment constituting the partial reception band data. A receiving device configured to receive at least first layer data and second layer data transmitted by an OFDM signal.
A band separator configured to acquire partial reception band data and non-partial reception band data from the OFDM signal, and
A frequency deinterleaving unit configured to perform frequency deinterleaving on the partial reception band data and the non-partial reception band data, and
A composite separation unit configured to acquire the first layer data and the second layer data from the partial reception band data and the non-partial reception band data that have been frequency deinterleaved by the frequency deinterleaved unit. When,
It is provided with an inter-layer inter-segment deinterleaving unit configured to perform frequency deinterleaving on a data carrier basis in all the segments constituting each of the first layer data and the second layer data.
The frequency deinterleaving unit performs frequency deinterleaving in units of segments constituting the partial reception band data based on the SP pattern of the first layer data and the SP pattern of the second layer data, or the portion. It is configured to perform frequency deinterleaving for each data carrier in all the segments that make up the reception band data.
The frequency deinterleaving unit is a receiving device characterized in that the frequency deinterleaving unit is configured to perform frequency deinterleaving on a data carrier unit in all segments constituting the non-partial reception band data. The frequency deinterleaving unit is configured to perform frequency deinterleaving in units of segments constituting the partial reception band data when the SP pattern of the first layer data and the SP pattern of the second layer data are different. The receiving device according to claim 4. The frequency deinterleaving unit is subjected to frequency deinterleaving in units of segments constituting the partial reception band data, or frequency deinterleaving in data carrier units in all segments constituting the partial reception band data. The receiving device according to claim 4 or 5, wherein the receiving device is configured to perform carrier rotation and carrier randomization within the segment constituting the partial reception band data. A chip composed of a processor that executes a program for operating a computer as a transmitter according to any one of claims 1 to 3. A chip composed of a processor that executes a program for operating a computer as a receiving device according to any one of claims 4 to 6.

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