JP7381283B2 - Transmitting device and receiving device - Google Patents

Description

The present invention relates to a transmitting device and a receiving device for a digital broadcasting system.

ISDB-T (Integrated Services Digital Broadcasting-Terrestrial), which is the current digital terrestrial broadcasting, is capable of layered transmission in which multiple layers with different transmission parameters are simultaneously transmitted. Transmission control information such as transmission parameters for each layer is transmitted by a TMCC (Transmission and Multiplexing Configuration Control) signal (see, for example, Non-Patent Document 1). The same TMCC signal is transmitted on multiple TMCC carriers in multiple segments, and by performing signal synthesis on the receiving side, a diversity effect can be obtained and reception performance can be improved.

In recent years, research on next-generation terrestrial digital broadcasting (hereinafter referred to as "next-generation terrestrial broadcasting") has been progressing toward the advancement of broadcasting services. Next-generation terrestrial broadcasting inherits the segment structure of OFDM (Orthogonal Frequency Division Multiplexing) signals, which is a feature of ISDB-T, and is a method that can multiplex mobile reception services together with fixed reception services into a single modulated wave. . Furthermore, by using an error correction code different from ISDB-T and a new signal structure, frequency usage efficiency is high and transmission parameters can be set flexibly depending on the service.

Since this transmission parameter information is transmitted as a TMCC signal, the receiving device needs to demodulate the TMCC signal before the data signal in order to obtain the transmission parameter information. Therefore, the transmission characteristics of the TMCC signal are required to be higher than those of the data signal.

Patent Document 1 describes a transmitting device that performs time interleaving on a TMCC signal including synchronization bits and TMCC information. This transmitter has error correction capability for TMCC signals by applying time interleaving to all parts (TMCC information and parity) within one OFDM frame except for the part where synchronization bits are subjected to carrier modulation processing. is improving.

Unexamined Japanese Patent Publication No. 2017-151042

“Terrestrial digital television broadcasting transmission system” standard, ARIB STD-B31, Radio Industries Association

By the way, next-generation terrestrial broadcasting can use parameters with a larger FFT (Fast Fourier Transform) size and longer symbol length than ISDB-T, and when using such parameters, transmission in a mobile reception environment This increases the influence of reception characteristic deterioration due to time fluctuations in the channel.

However, in a TMCC transmission system such as ISDB-T, the same information included in the TMCC signal is transmitted in the same symbol (ie, at the same timing) in each TMCC carrier. Therefore, in a transmission path environment with large time fluctuations, when the reception condition of a particular symbol deteriorates, a part of the TMCC signal is lost, causing a large deterioration of the overall TMCC transmission characteristics.

The method described in Patent Document 1 does not take such issues into account, and simply time-interleaves the TMCC signal, so the same information included in the TMCC signal is not in the same symbol in each TMCC carrier. can be transmitted. Therefore, it is difficult to improve the TMCC transmission characteristics in a transmission path environment with large time fluctuations.

Therefore, an object of the present invention is to provide a transmitting device and a receiving device that can improve TMCC transmission characteristics in a transmission path environment with large time fluctuations.

The transmitting device according to the first feature is a transmitting device for a digital broadcasting system that performs transmission using a signal structure in which a predetermined band consists of a plurality of segments in the frequency direction and a frame consists of a plurality of symbols in the time direction. The transmitting device includes a time interleaving unit that performs time interleaving on a TMCC signal arranged in each of the TMCC carriers of the plurality of segments on a symbol-by-symbol basis within the frame. The time interleaving unit varies the interleaving pattern in the time interleaving for each segment or for each TMCC carrier.

The receiving device according to the second feature is a receiving device for a digital broadcasting system that performs transmission using a signal structure in which a predetermined band consists of a plurality of segments in the frequency direction and a frame consists of a plurality of symbols in the time direction. The receiving device includes a time deinterleaving unit that performs time deinterleaving on a TMCC signal placed in each of the TMCC carriers of the plurality of segments on a symbol-by-symbol basis within the frame. The time deinterleaving unit varies the deinterleaving pattern in the time deinterleaving for each segment or for each TMCC carrier.

According to the present invention, it is possible to provide a transmitting device and a receiving device that can improve TMCC transmission characteristics in a transmission path environment with large time fluctuations.

FIG. 1 is a diagram for explaining a digital broadcasting system according to an embodiment. FIG. 3 is a diagram showing information allocation to general TMCC carriers. FIG. 1 is a diagram showing a transmitting device according to an embodiment. FIG. 6 is a diagram illustrating an example of a case where time interleaving patterns (shift amounts) are made different for each TMCC carrier according to the embodiment. FIG. 7 is a diagram illustrating an example of a case where the time interleave pattern (shift amount) is different for each segment according to the embodiment. FIG. 1 is a diagram showing a receiving device according to an embodiment. It is a figure showing an example of an effect of an embodiment. FIG. 7 is a diagram illustrating an example of a modification of the time interleaving unit of the transmitting device. FIG. 6 is a diagram illustrating an example of a modification of the time deinterleaving unit of the receiving device. FIG. 6 is a diagram illustrating an example of information allocation to TMCC carriers when applied to a non-partial reception band. FIG. 6 is a diagram illustrating an example of information allocation to TMCC carriers when the FFT size is 16k.

Embodiments will be described with reference to the drawings. In the description of the drawings, the same or similar parts are designated by the same or similar symbols.

<Digital broadcasting system>
First, a digital broadcasting system according to this embodiment will be explained. The digital broadcasting system according to this embodiment is a broadcasting system compatible with next-generation terrestrial broadcasting. FIG. 1 is a diagram for explaining a digital broadcasting system according to this embodiment.

(1) Signal Structure The occupied bandwidth of the digital broadcasting system according to this embodiment is, for example, 5.83 MHz or 5.57 MHz. 5.83 MHz is a bandwidth that is approximately 4.7% wider than ISDB-T, and can increase transmission capacity. On the other hand, 5.57 MHz is the same bandwidth as ISDB-T.

The number of segments has been expanded from ISDB-T's 13 segments to a maximum of 35 segments by narrowing the bandwidth per segment, making it possible to flexibly allocate bandwidth to each layer. Furthermore, transmission parameters such as the number of modulation levels and coding rate are more complete than ISDB-T, so that transmission capacity and transmission durability can be set more precisely according to the service.

As the error correction code, an LDPC code and a BCH code, which have better error correction ability than ISDB-T, are used. The FFT size can be selected from three types: 8k, 16k, and 32k. If the FFT size is increased, the symbol length can be increased, so when the physical guard interval lengths are the same, the ratio of the guard interval length to the symbol length becomes smaller, and the transmission efficiency improves.

Furthermore, in the digital broadcasting system according to the present embodiment, the middle 9 segments of the total 35 segments are used as a band for partial reception (hereinafter referred to as a "partial reception band"). The partial reception band is used to transmit layer A data signals for mobile reception. Bands other than the partial reception band are called non-partial reception bands. The bandwidth of the partial reception band has been expanded 3.5 times (bandwidth: 1.50MHz) compared to ISDB-T's One Seg (bandwidth: 0.43MHz), and by widening the bandwidth, Efforts are being made to reduce the effects of frequency selective fading.

(2) TMCC Signal Transmission Information transmitted in the TMCC signal is transmission parameters such as occupied bandwidth, modulation method in each layer, and coding rate of error correction code. When a receiving device demodulates a broadcast wave, it is essential to obtain this information from a predetermined TMCC signal.

In order to transmit the TMCC signal, a carrier for the TMCC signal (hereinafter referred to as a "TMCC carrier") is allocated within the OFDM segment. In addition to the TMCC signal, the OFDM frame includes an SP (Scattered Pilot) signal and an LLch (Low Latency Channel) signal. The LLch signal corresponds to an ISDB-T AC (Auxiliary Channel) signal.

The TMCC signal and the LLch signal are transmitted at a power level that is boosted compared to the average power of the data signal, so that transmission robustness against errors can be obtained. Also, by boosting it, it plays a role as a pilot signal for frequency synchronization.

The number of TMCC carriers differs depending on the FFT size, but since the TMCC signal is transmitted in units of OFDM frames, the product of the number of symbols in an OFDM frame and the number of TMCC carriers in the digital broadcasting system according to this embodiment is all The FFT size is 448 carrier symbols.

Since DBPSK is used as the carrier modulation method, 448 carrier symbols correspond to 448 bits. Among these, the first 40 bits of the OFDM frame are used as signals for differential reference and frame synchronization, so the remaining 408 bits are allocated as transmission parameter information and parity bits.

In ISDB-T, the same TMCC signal is transmitted in each segment, but in the digital broadcasting system according to this embodiment, different TMCC signals are transmitted in the partial reception band and the non-partial reception band.

(3) TMCC signal transmission in non-partial reception band The TMCC signal includes system identification, partial reception flag, and transmission parameter information for each layer, and the amount of information is 244 bits. All of this information is transmitted in the non-partial reception band. The 244 bits are divided into two and encoded with a shortened code (204, 122) of the difference set cyclic code (273, 191). A 408-bit TMCC signal is composed of two encoded 204-bit encoded blocks.

Since the same TMCC signal is transmitted in each segment of the 26-segment non-partial reception band, the receiving device can receive the 26 carrier symbols in a combined manner, thereby enhancing the reception durability of the TMCC signal.

(4) TMCC signal transmission in partial reception band Since the partial reception band has 9 segments, only 9 carrier symbols can be combined using the same transmission method as non-partial reception. Therefore, in order to improve transmission characteristics within the limited number of segments, the amount of information in the TMCC signal to be transmitted is reduced.

Since the partial reception band is a band for transmitting the A layer, the TMCC information bits are limited to only the information necessary for receiving the A layer, and are set to 122 bits, which is half of the total information amount. The same difference set cyclic code (204, 122) as in the non-partial reception band is used as the error correction code.

A 408-bit TMCC signal is constructed by duplicating and concatenating two encoded 204-bit encoded blocks. That is, within the partial reception band, the same TMCC signal can be transmitted twice within one segment.

Within the partial reception band, all nine segments are used to transmit the TMCC signal for partial reception, regardless of the number of segments in the A layer. Therefore, the receiving device can receive 18 carrier symbols in combination, and can strengthen the reception durability of the TMCC signal.

Generally, in each segment, TMCC signals of the same information are transmitted using symbols with the same symbol number. FIG. 2 shows information allocation to general TMCC carriers. FIG. 2 shows an example in which the FFT size is 8k. In addition, the segment is abbreviated as "SEG".

As shown in FIG. 2, in the frequency direction, the partial reception band consists of a total of 9 segments of SEG #0 to #8, and each segment consists of 216 carriers. Two TMCC carriers are assigned to each segment. Therefore, there are 18 TMCC carriers in the entire partial reception band. Furthermore, in the time direction, a frame consists of 224 symbols. However, in this embodiment, the number of TMCC carriers, etc. are not limited to the example of FIG. 2.

In general information allocation to TMCC carriers, the same information is allocated to symbols with the same symbol number in 18 TMCC carriers. That is, the same information is placed in the n-th symbol (0≦n≦223) of the 18 TMCC carriers. Therefore, if the reception condition for a particular symbol is poor, part of the TMCC signal is lost, leading to deterioration of the overall reception characteristics.

<Transmission device>
Next, a transmitting device according to this embodiment will be explained. In the following, TMCC signal transmission in the partial reception band will be mainly explained. FIG. 3 is a diagram showing the transmitting device 1 according to this embodiment.

As shown in FIG. 3, the transmitting device 1 includes a TMCC signal generating section 11, an error correction encoding section 12, a time interleaving section 13, a TMCC signal modulating section 14, an OFDM frame configuring section 15, and a transmitting section 16. Equipped with.

The TMCC signal generation section 11 generates a TMCC signal and outputs the generated TMCC signal to the error correction encoding section 12. The information included in the TMCC signal is transmission parameters such as the occupied bandwidth, the modulation method in each layer, and the coding rate of the error correction code.

Error correction encoding section 12 performs error correction encoding on the TMCC signal input from TMCC signal generation section 11 and outputs the TMCC signal after error correction encoding to time interleaving section 13 . A difference set cyclic code (204, 122) is used as the error correction code.

The time interleaving unit 13 performs time interleaving on the TMCC signal input from the error correction encoding unit 12 and outputs the time interleaved TMCC signal to the TMCC signal modulation unit 14.

The time interleaving unit 13 performs time interleaving (cyclic shift interleaving) on the TMCC signals allocated to the TMCC carriers of each of the plurality of segments constituting the partial reception band (predetermined band) on a symbol-by-frame basis. The time interleaving unit 13 changes the interleaving pattern in time interleaving for each segment or for each TMCC carrier. Note that the time interleaving unit 13 interleaves not only the TMCC information included in the TMCC signal but also synchronization information (synchronization bit).

In this embodiment, the time interleaving unit 13 includes a cyclic shift interleaving unit 131. For each TMCC carrier, the cyclic shift interleaving unit 131 cyclically shifts information included in the TMCC signal allocated to the TMCC carrier in units of symbols. For example, the cyclic shift interleaving unit 131 determines the shift amount in the cyclic shift for each TMCC carrier based on the segment number of the segment to which the TMCC carrier belongs or the carrier number of the TMCC carrier.

Such cyclic shift interleaving allows information to be dispersed in the time direction, and can be expected to improve reception characteristics.

FIG. 4 shows an example in which the time interleaving pattern (shift amount) is different for each TMCC carrier, and FIG. 5 is an example in which the time interleaving pattern (shift amount) is different in each segment. 4 and 5 show an example in which the FFT size is 8k.

In the example shown in FIG. 4, the cyclic shift interleaving unit 131 makes the time interleaving pattern different for each TMCC carrier by determining the amount of cyclic shift for each TMCC carrier. The shift amount is set to shift at approximately equal intervals within one frame. Although FIG. 4 shows an example in which 12 symbols are cyclically shifted and arranged for each TMCC carrier, the amount of shift may be any value.

In the example shown in FIG. 5, the cyclic shift interleaving unit 131 makes the time interleave pattern different for each segment by determining the shift amount of the cyclic shift for each segment. The shift amount is set to shift at approximately equal intervals within one frame. In the method of FIG. 5, within a segment, the same information is allocated to the same symbol number on TMCC carriers within one segment.

When using 16k FFT of 112 symbols per frame, for example, in a partial reception band with a 9 segment width, the shift amount can be set to 12 for each segment, and in a non-partial reception band with a 26 segment width, the shift amount can be set to 12 for each segment. can be set to 4.

The TMCC signal modulation section 14 performs differential modulation on the TMCC signal input from the time interleaving section 13 and outputs the differentially modulated TMCC signal to the OFDM frame configuration section 15.

The OFDM frame configuration unit 15 allocates the TMCC signal input from the TMCC signal modulation unit 14 to an OFDM frame together with a data signal, and outputs the OFDM frame to the transmission unit 16.

The transmitting unit 16 transmits the OFDM frame input from the OFDM frame configuring unit 15.

<Receiving device>
Next, a receiving device according to this embodiment will be explained. FIG. 6 is a diagram showing the receiving device 2 according to this embodiment.

As shown in FIG. 6, the receiving device 2 includes a receiving section 21, a TMCC signal extracting section 22, a TMCC signal decoding section 23, a time deinterleaving section 24, a TMCC signal adding section 25, and a TMCC signal error correction decoding section. section 26 and a data signal decoding section 27.

The receiving unit 21 receives the signal (OFDM frame) transmitted from the transmitting device 1 and outputs the received signal to the TMCC signal extracting unit 22 and the data signal decoding unit 27.

The TMCC signal extractor 22 extracts a TMCC signal from the signal input from the receiver 21 and outputs the extracted TMCC signal to the TMCC signal decoder 23.

TMCC signal decoding section 23 performs TMCC decoding on the TMCC signal input from TMCC signal extraction section 22 and outputs the decoded TMCC signal to time deinterleaving section 24 .

The time deinterleaving unit 24 performs the reverse processing of the processing performed by the time interleaving unit 13 of the transmitting device 1. That is, the time deinterleaving unit 24 performs time deinterleaving on the TMCC signal input from the TMCC signal decoding unit 23 and outputs the time deinterleaved TMCC signal to the TMCC signal addition unit 25.

The time deinterleaving unit 24 performs time deinterleaving on the TMCC signals arranged in the TMCC carriers of each of the plurality of segments constituting the partial reception band (predetermined band) on a symbol-by-frame basis. The time deinterleaving unit 24 changes the deinterleaving pattern in time deinterleaving for each segment or for each TMCC carrier.

The time deinterleaving unit 24 includes a cyclic shift deinterleaving unit 241. For each TMCC carrier, the cyclic shift deinterleaving unit 241 cyclically shifts information included in the TMCC signal allocated to the TMCC carrier in units of symbols. For example, the cyclic shift deinterleaving unit 241 determines the shift amount in the cyclic shift for each TMCC carrier based on the segment number of the segment to which the TMCC carrier belongs or the carrier number of the TMCC carrier.

The TMCC signal addition section 25 performs signal addition on the TMCC signal input from the time deinterleaving section 24 and outputs the TMCC signal after the signal addition to the TMCC signal error correction decoding section 26 .

The TMCC signal error correction decoding section 26 acquires TMCC information (transmission parameters) by performing signal error correction decoding on the TMCC signal input from the TMCC signal addition section 25, and transmits the TMCC information to the data signal decoding section 27. Output.

The data signal decoding section 27 decodes the data signal based on the TMCC information input from the TMCC signal error correction decoding section 26, and outputs the decoded data signal.

<Action/Effect>
According to the transmitting device 1 and the receiving device 2 according to the present embodiment, by changing the time interleaving (time deinterleaving) pattern applied to the TMCC signal for each segment or for each TMCC carrier, the TMCC signal of each TMCC carrier is The same information included can be dispersed in the time direction.

As a result, even if information transmitted in a certain symbol is affected by significant deterioration, the same information is transmitted in another symbol, so the influence of deterioration can be alleviated. Therefore, TMCC transmission characteristics can be improved in a transmission path environment with large time fluctuations.

FIG. 7 is a diagram illustrating an example of the effects of the present embodiment, and shows a comparison of the required C/N with respect to the moving speed with and without the cyclic shift interleaving (IL) according to the present embodiment. . As shown in FIG. 7, speed tolerance is improved by applying the cyclic shift interleaving according to this embodiment.

<Example of change>
FIG. 8 is a diagram showing a modification example of the time interleaving unit 13 of the transmitting device 1. FIG. 9 is a diagram showing a modification example of the time deinterleaving unit 24 of the receiving device 2. In FIG.

As shown in FIG. 8, the time interleaving unit 13 according to the present modification performs time interleaving using a randomization table instead of time interleaving using cyclic shift. Specifically, the time interleaving unit 13 includes a randomization table holding unit 132 and an interleaving unit 133.

The randomization table holding unit 132 holds a randomization table that defines the correspondence between symbol numbers before and after interleaving for each segment number or carrier number. For each TMCC carrier, the interleaving unit 133 interleaves the information included in the TMCC signal allocated to the TMCC carrier according to the randomization table.

Similarly, as shown in FIG. 9, the time deinterleaving unit 24 according to the present modification performs time deinterleaving using a randomization table instead of time deinterleaving using a cyclic shift. Specifically, the time deinterleaving unit 24 includes a randomization table holding unit 242 and a deinterleaving unit 243.

The randomization table holding unit 242 holds a randomization table that defines the correspondence between symbol numbers before and after deinterleaving for each segment number or carrier number. For each TMCC carrier, the deinterleaving unit 243 deinterleaves information included in the TMCC signal allocated to the TMCC carrier according to a randomization table.

Also according to this modification example, the same information included in the TMCC signal of each TMCC carrier can be dispersed in the time direction, so that the TMCC transmission characteristics can be improved in a transmission path environment with large time fluctuations.

<Other embodiments>
In the embodiments described above, TMCC signal transmission in partial reception bands has been mainly described, but the method according to the embodiments described above may be applied to non-partial reception bands. As described above, different TMCC information is transmitted between the partial reception band and the non-partial reception band. In the partial reception band, only transmission control information for decoding layer A is transmitted, and in the non-partial reception band, transmission control information for all layers is transmitted.

FIG. 10 shows information allocation to TMCC carriers when applied to a non-partial reception band. Since there is a lot of information to be transmitted in the non-partial reception band, one piece of TMCC information is transmitted using multiple TMCC carriers. Note that the shift amount shown in FIG. 10 is just an example, and other shift amounts may be applied. Furthermore, even within the partial reception band, when one piece of TMCC information is transmitted using a plurality of TMCC carriers in one segment, the configuration shown in FIG. 10 can be used.

In the embodiment described above, an example in which the FFT size is 8k has been mainly described. However, the FFT size is not limited to 8k. FIG. 11 shows an example in which the FFT size is 16k. When the FFT size is 16k, the number of TMCC carriers in one segment is twice that when the FFT size is 8k, that is, 4. The same TMCC information is placed on two of these four TMCC carriers, and the same TMCC information is placed on the remaining two TMCC carriers. In such a case, the amount of shift is made different between two TMCC carriers on which the same TMCC information is arranged so that the same information does not become the same symbol number.

A program that causes a computer to execute each process performed by the transmitting device 1 and a program that causes a computer to execute each process that the receiving device 2 performs may be provided. The program may be recorded on a computer readable medium. Computer-readable media allow programs to be installed 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.

Furthermore, the transmitting device 1 may be configured as a semiconductor integrated circuit (chip set, SoC) by integrating functional units (circuits) that execute each process performed by the transmitting device 1. Similarly, the receiving device 2 may be configured as a semiconductor integrated circuit (chip set, SoC) by integrating functional units (circuits) that execute each process performed by the receiving device 2.

Although one embodiment has been described above in detail with reference to the drawings, the specific configuration is not limited to that described above, and various design changes can be made within the scope of the gist. .

1: Transmitting device 2: Receiving device 11: TMCC signal generation unit 12: Error correction encoding unit 13: Time interleaving unit 14: TMCC signal modulation unit 15: OFDM frame configuration unit 16: Transmitting unit 21: Receiving unit 22: TMCC signal Extracting section 23: TMCC signal decoding section 24: Time deinterleaving section 25: TMCC signal addition section 26: TMCC signal error correction decoding section 27: Data signal decoding section 131: Cyclic shift interleaving section 132: Randomization table holding section 133: Interleaving section 241: Cyclic shift deinterleave unit 242: Randomize table holding unit 243: Deinterleave unit

Claims (6)

A transmitting device for a digital broadcasting system that performs transmission using a signal structure in which a predetermined band consists of a plurality of segments in the frequency direction and a frame consists of a plurality of symbols in the time direction,
a time interleaving unit that performs time interleaving on a TMCC signal arranged in each of the TMCC carriers of the plurality of segments on a symbol-by-symbol basis within the frame;
The time interleaving unit varies the interleaving pattern in the time interleaving for each segment or for each TMCC carrier ,
The time interleaving unit includes a cyclic shift interleaving unit that cyclically shifts information included in the TMCC signal arranged on the TMCC carrier on a symbol-by-symbol basis for each TMCC carrier,
The transmitting device, wherein the cyclic shift interleaving unit determines the shift amount in the cyclic shift for each TMCC carrier based on a segment number of a segment to which the TMCC carrier belongs or a carrier number of the TMCC carrier. A transmitting device for a digital broadcasting system that performs transmission using a signal structure in which a predetermined band consists of a plurality of segments in the frequency direction and a frame consists of a plurality of symbols in the time direction,
a time interleaving unit that performs time interleaving on a TMCC signal arranged in each of the TMCC carriers of the plurality of segments on a symbol-by-symbol basis within the frame;
The time interleaving unit varies the interleaving pattern in the time interleaving for each segment or for each TMCC carrier,
The time interleaving part is
a randomization table holding unit that holds a randomization table that defines the correspondence between symbol numbers before and after interleaving for each segment number or carrier number;
A transmitting device comprising: an interleaving unit that interleaves, for each of the TMCC carriers, information included in the TMCC signals arranged on the TMCC carriers according to the randomization table. The predetermined band is a partial reception band for mobile reception,
3. The transmitting device according to claim 1 , wherein the time interleaving unit makes the interleaving pattern different for each segment within the partial reception band or for each TMCC carrier within the partial reception band. A receiving device for a digital broadcasting system that performs transmission using a signal structure in which a predetermined band consists of a plurality of segments in the frequency direction and a frame consists of a plurality of symbols in the time direction,
a time deinterleaving unit that performs time deinterleaving on a TMCC signal arranged in each of the TMCC carriers of the plurality of segments on a symbol-by-symbol basis within the frame;
The time deinterleaving unit varies the deinterleaving pattern in the time deinterleaving for each segment or for each TMCC carrier ,
The time deinterleaving unit includes a cyclic shift deinterleaving unit that cyclically shifts information included in the TMCC signal arranged on the TMCC carrier in symbol units for each of the TMCC carriers,
The receiving device, wherein the cyclic shift deinterleaving unit determines the shift amount in the cyclic shift for each TMCC carrier based on a segment number of a segment to which the TMCC carrier belongs or a carrier number of the TMCC carrier. . A receiving device for a digital broadcasting system that performs transmission using a signal structure in which a predetermined band consists of a plurality of segments in the frequency direction and a frame consists of a plurality of symbols in the time direction,
a time deinterleaving unit that performs time deinterleaving on a TMCC signal arranged in each of the TMCC carriers of the plurality of segments on a symbol-by-symbol basis within the frame;
The time deinterleaving unit varies the deinterleaving pattern in the time deinterleaving for each segment or for each TMCC carrier,
The time deinterleaving section includes:
a randomization table holding unit that holds a randomization table that defines the correspondence between symbol numbers before and after deinterleaving for each segment number or carrier number;
A receiving device comprising: a deinterleaving unit that deinterleaves, for each of the TMCC carriers, information included in the TMCC signals arranged on the TMCC carriers according to the randomization table. The predetermined band is a partial reception band for mobile reception,
6. The receiving apparatus according to claim 4, wherein the time deinterleaving unit makes the deinterleaving pattern different for each segment within the partial reception band or for each TMCC carrier within the partial reception band.

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