JP2006295497A - Digital broadcast signal transmission system and transmission processor thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress system costs and to transmit broadcast signals of stable quality by integrating transmission systems into one system, when retransmitting a plurality of sorts of digital broadcast signals. <P>SOLUTION: For mixing of a digital broadcast signal of a 12 GHz band with another digital broadcast signal of a band of 2.6 GHz and lower, a transmission processor 5 directly converts the band of 12 GHz into a band of 2.6 GHz and higher, which is an unused frequency band, without dropping the band to an intermediate frequency and mixes the converted band with the other digital broadcast signal and converts a signal whose transmission is difficult in a coaxial cable from an electrical signal into an optical signal and transmits the optical signal through an optical transmission line 16 by using optical fibers. A receiving processor 17 receives an optical signal, converts the optical signal into electrical signal and returns the broadcast signal, whose frequency is converted on the transmission side into the original band to solve the problem of attenuation quantity differences due to the transmission frequency band. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a digital broadcast signal transmission system that individually receives various digital broadcasts such as terrestrial digital broadcasts and a plurality of digital satellite broadcasts with respective antennas and retransmits the received signals together.

  Recently, in addition to BS (Broadcast Satellite) broadcasting, 110-degree CS (Communication Satellite) broadcasting, and digital satellite broadcasting in CS broadcasting, terrestrial digital broadcasting has been started. In a transmission system that receives a plurality of broadcast signals and retransmits them to a plurality of terminals, the satellite broadcast signal is converted to an intermediate frequency suitable for transmission on a coaxial cable or the like by a converter provided in an antenna output unit. However, since the intermediate frequencies overlap each other, they cannot be transmitted through the same transmission line, but are transmitted through a coaxial cable separately laid.

  For example, in order to receive terrestrial digital broadcast, BS broadcast / 110 degree CS broadcast, and CS broadcast JCSAT-4A service and JCSAT-3 service and transmit them to a plurality of terminals, BS broadcast / 110 degree CS The intermediate frequency of the broadcast broadcast signal, the intermediate frequency of the CS broadcast JCSAT-4A service signal, and the intermediate frequency of the CS broadcast JCSAT-3 service signal overlap. For this reason, transmission is performed in a configuration of three coaxial systems: a terrestrial digital broadcast + BS broadcast + 110 degree CS broadcast transmission system 1, a CS broadcast JCSAT-4A service transmission system 2, a CS broadcast JCSAT-3 service transmission system 3. The

  In addition, the frequency conversion is performed so that the horizontal (H) / vertical (V) polarization of the JCSAT-4A service in CS broadcasting does not overlap with the intermediate frequency of the horizontal (H) / vertical (V) polarization of the JCSAT-3 service, There is also a method of transmitting a CS broadcast with one system by transmitting the CS broadcast with one system.

  A coaxial cable is generally used as the transmission line, and it is known that the characteristic of the coaxial cable increases as the transmission frequency increases. The JIS standard specifies the attenuation of the coaxial cable at 1800 MHz, but does not specify the existing right-handed circularly polarized wave of 110-degree CS broadcasting or 2072 MHz, which is the frequency band of CS skyperfec TV broadcasting. Therefore, in order to transmit the high-frequency broadcast signal as described above, it is necessary to install amplifiers in multiple stages in the transmission section in order to compensate for transmission loss.

Furthermore, it is expected that an intermediate frequency of the left-handed circularly polarized wave of 110 degree CS broadcast planned in the future will be used in a higher frequency band of 2126 MHz to 2602 MHz.
On the other hand, there is a method in which an intermediate frequency of satellite broadcasting having a high frequency is transmitted by an optical fiber, and a frequency of terrestrial broadcasting having a low frequency is transmitted by a coaxial cable, and then synthesized and output (see Patent Document 1). However, this method has two transmission configurations different from the transmission system using the optical fiber and the transmission system using the coaxial cable, which increases economic disadvantage and may complicate the design and operation management.

JP-A-7-107328

  As described above, in the conventional digital broadcast transmission system, the transmission configuration becomes complicated in the three-system or two-system transmission configuration using the coaxial cable or the two-system transmission configuration combining the optical fiber and the coaxial cable. It leads to many problems such as transmission quality degradation problems, cost problems, space problems, amplifier power supply acquisition problems, maintenance operations such as failure response and equipment adjustment in multistage connection.

  Further, when transmitting a band signal exceeding 2.6 GHz, which is not assumed in the conventional broadcast IF, the coaxial cable has a very large transmission loss, leading to a problem that long-distance and multi-distribution transmission is difficult. For example, when a signal is transmitted using an S-7C-FB coaxial cable, the transmission signal attenuation per meter differs by about three times between a 1 GHz band signal and a 5 GHz band signal.

  Broadcast signals can be classified into two types: analog modulation signals and digital modulation signals. Analog modulation signals are required to have about 10 dB better quality than digital modulation signals. As a result, the degree of modulation to be allocated increases, and high linearity is required for the electrical / optical conversion unit and the amplification unit. When transmitting an analog modulation signal in this way, high linearity must be required for the components, leading to the problem of difficulty in selecting components.

  The present invention has been made in view of the above circumstances. For retransmission of multiple types of digital broadcasts such as terrestrial digital broadcasts and multiple satellite broadcasts, the transmission system is integrated into one system, system cost is reduced, and multiple stages such as amplifiers are provided. It is an object of the present invention to provide a digital broadcast signal transmission system that can eliminate the connection and transmit a broadcast signal with stable quality, and a transmission processing device and a reception processing device thereof.

The digital broadcast signal transmission system according to the present invention is configured as follows.
(1) Band conversion means for directly converting one or a plurality of digital broadcast signals in the 12 GHz band to an unused band of 2.6 GHz or more, and the band-converted digital broadcast signal is transmitted in a frequency band of 2.6 GHz or less. Mixing means for mixing with other digital broadcast signals; electrical / optical conversion means for converting the mixed digital broadcast signals into optical signals; optical transmission means for transmitting the optical signals; and transmission by the optical transmission means Optical / electrical conversion means for receiving an optical signal to be converted into an electric signal, separation means for separating the digital broadcast signal mixed by the mixing means from the received optical signal, and the separated digital signal Frequency conversion means for converting the broadcast signal into the input frequency band of the corresponding broadcast receiving device.

  (2) In the configuration of (1), in particular, the one or a plurality of digital broadcast signals in the 12 GHz band are a vertically polarized signal in the 12.25 GHz to 12.73 GHz band of the JCSAT-3 communication satellite broadcast and a 12.27 GHz to At least one of a 12.75 GHz band horizontal polarization signal, a JCSAT-4A communication satellite broadcast signal 12.25 GHz to 12.73 GHz band vertical polarization signal, and a 12.27 GHz to 12.75 GHz band horizontal polarization signal The other digital broadcast signals transmitted in the frequency band of 2.6 GHz or less are a broadcast signal of 470 MHz to 770 MHz band of terrestrial digital broadcast, a broadcast signal of 1032 MHz to 1489 MHz band of BS (Broadcast Satellite) broadcast, 110 degrees CS (Communication Satellite) broadcast right converted to 1595MHz-2602MHz band · Wherein the left 旋放 at least one of transmission signal.

(3) In the configuration of (1), the optical transmission means includes optical distribution means for distributing the optical signal to a plurality of systems.
The transmission processing apparatus of the digital broadcast signal transmission system according to the present invention is configured as follows.
(4) Band conversion means for directly converting one or a plurality of digital broadcast signals in the 12 GHz band to an unused band of 2.6 GHz or more, and the band-converted digital broadcast signal is transmitted in a frequency band of 2.6 GHz or less. Mixing means for mixing with other digital broadcast signals, and electrical / optical conversion means for converting the mixed digital broadcast signals into optical signals and sending them to an optical transmission line.

  (5) In the configuration of (4), the one or more digital broadcast signals in the 12 GHz band are a vertically polarized signal in the 12.25 GHz to 12.73 GHz band of the JCSAT-3 communication satellite broadcast and 12.27 GHz to 12.12 GHz. 75 GHz band horizontal polarization signal, JCSAT-4A communication satellite broadcast signal 12.25 GHz to 12.73 GHz band vertical polarization signal and 12.27 GHz to 12.75 GHz band horizontal polarization signal, The other digital broadcast signals transmitted in the frequency band of 2.6 GHz or less are terrestrial digital broadcast 470 MHz to 770 MHz band broadcast signals, BS (Broadcast Satellite) broadcast 1032 MHz to 1489 MHz band broadcast signals, 110 degree CS ( Communication Satellite) right-handed / left converted to 1595MHz-2602MHz band of broadcasting Characterized in that at least one of a broadcast signal.

  That is, conventionally, when a 12 GHz digital broadcast signal is received, the band is converted around 1 GHz to 2 GHz according to the characteristics of the coaxial cable used for the transmission line, but other digital broadcast signals are also combined. When trying to transmit, the signal is also converted to the same frequency band, and cannot be mixed as it is. Therefore, the present invention presupposes that an optical transmission line using an optical fiber is used as a transmission line, and converts a digital broadcast signal of 12 GHz band to an unused band of 2.6 GHz or higher, and other than 2.6 GHz. It can be mixed with digital broadcast signals.

  For example, the vertical polarization signal of 12.25 GHz to 12.73 GHz band and the horizontal polarization signal of 12.27 GHz to 12.75 GHz band of the conventional JCSAT-3 communication satellite broadcast, 12.25 GHz of the JCSAT-4A communication satellite broadcast signal LNB (Low Noise Block Converter) is attached to the receiving antenna for receiving the vertical polarization signal of -12.73 GHz band and the horizontal polarization signal of 12.27 GHz-12.75 GHz band. The satellite downlink signal is frequency-converted around 1 GHz to 2 GHz in accordance with the characteristics of the coaxial cable used as the transmission line. However, if an optical transmission line using an optical fiber cable is used for the transmission line, this is not limited to this, and it is possible to convert to a higher frequency and widen the transmission frequency.

  Therefore, in the present invention, the vertical polarization signal and horizontal polarization signal of the JCSAT-3 communication satellite broadcast, and the vertical polarization signal and horizontal polarization signal of the JCSAT-4A communication satellite broadcast signal are directly in the band of 2.6 GHz or more by the LNB. So that it does not overlap the band of other digital broadcast signals, and is converted into an optical signal for transmission. In this way, the problem that there is a difference in the amount of attenuation due to the transmission frequency band is solved by having the characteristic of performing electrical / optical conversion immediately after mixing in the transmission processing and transmitting it by the optical transmission means. In addition, it has the feature that the signal to be transmitted is limited to digital, so that modulation degree per channel and total modulation degree at the time of electrical / optical conversion can be suppressed, and broadband digital broadcast signal light transmission can be made easier. Yes.

  As described above, according to the present invention, with respect to retransmission of a plurality of types of digital broadcasts such as terrestrial digital broadcasts and multiple satellite broadcasts, the transmission system is made one system, system cost is reduced, and multistage connection such as amplifiers is eliminated and stable. It is possible to provide a digital broadcast signal transmission system capable of transmitting a broadcast signal with high quality, its transmission processing device, and reception processing device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a configuration of a digital broadcast transmission system according to the present invention. As an antenna system, a BS / 110 degree CS digital satellite broadcast receiving parabola antenna (hereinafter referred to as a first satellite digital antenna) 1, a terrestrial digital TV broadcast is shown. A receiving antenna (hereinafter referred to as terrestrial digital antenna) 3 and a CS digital satellite broadcast receiving parabolic antenna (hereinafter referred to as second satellite digital antenna) 6a and 6b are prepared. Hereinafter, the system configuration will be described with reference to the relationship between the frequency band of each digital broadcast signal and the transmission frequency band for retransmission shown in FIG.

  A frequency converter (LNB: Low Noise Block Converter) 2 is attached to the output portion of the first satellite digital antenna 1. This frequency converter 2 converts the BS broadcast 11.71 GHz to 12.17 GHz band signal B received by the antenna 1 into a specified intermediate frequency band 1032 MHz to 1489 MHz, and 110 degree CS broadcast 12.27 GHz to 12.75 GHz. For converting the right-handed circularly polarized wave signal in the band and the left-handed circularly polarized signal C in the 12.25-12.73 GHz band to the specified intermediate frequency bands 1595 MHz-2071 MHz, 2126 MHz-2602 MHz, respectively, It is sent to the booster 4 together with the terrestrial digital broadcast signal A received by the digital antenna 3 to be mixed and amplified. Hereinafter, this signal is referred to as a broadcast signal G. This broadcast signal is sent to the transmission processing device 5.

  The transmission processing device 5 inputs the signals of JCSAT-3 and JCSAT-4A received by the second satellite digital antennas 6a and 6b to the demultiplexing units 7a and 7b, respectively, and performs vertical operation in the 12.25 GHz to 12.73 GHz band. Separated into a polarization signal (V) and a horizontal polarization signal (H) of 12.27 GHz to 12.75 GHz band. The JCSAT-3 (V) and JCSAT-3 (H) output from the demultiplexing unit 7a are frequency converted into non-overlapping bands of 2.6 GHz or more by the frequency conversion units 8a and 8b, respectively. Hereinafter, the frequency-converted JCSAT-3 (V) and JCSAT-3 (H) are referred to as broadcast signals D1 and D2, respectively. Similarly, JCSAT-4A (V) and JCSAT-4A (H) output from the demultiplexing unit 7b do not overlap each other with frequency conversion units 8c and 8d having 2.6 GHz or more and broadcast signals D1 and D2 or more. Frequency converted to band. Hereinafter, the frequency-converted JCSAT-4A (V) and JCSAT-4A (H) are referred to as broadcast signals E1 and E2, respectively.

The broadcast signals D1 and D2 are mixed by the mixing unit 9a to become the broadcast signal D3, the broadcast signals E1 and E2 are mixed by the mixing unit 9b to be the broadcast signal E3, both are further mixed by the mixing unit 10, and the amplification unit 11 is amplified into a broadcast signal F.
The transmission processing device 5 takes in the broadcast signal G from the input terminal 12 and mixes it with the broadcast signal F by the mixing unit 13 to generate the broadcast signal H. This broadcast signal H is converted into an optical signal by an electrical-optical converter (E / O) 14 and sent from an optical output terminal 15 to an optical transmission line 16 using an optical fiber.

  On the other hand, the reception processing device 17 takes in an optical signal optically transmitted through the optical transmission line 16 from the optical input terminal 18 and converts it into an electrical signal suitable for in-home output by an optical-electrical converter (O / E) 19. To restore the broadcast signal H. The broadcast signal H is divided by the dividing unit 20 into two systems of a broadcast signal G having a band of 2.6 GHz or less and a broadcast signal F having a band of 2.6 GHz or more.

  The broadcast signal G is amplified by the amplifier 23a and output from the output terminal 24a to the duplexer 25. The demultiplexer 25 demultiplexes the terrestrial digital broadcast signal and the BS · 110 ° CS digital broadcast signal, and both are input to the terrestrial digital · BS · 110 ° CS tuner 26, whereby the terrestrial digital broadcast, Digital broadcasting signals of BS digital broadcasting and 110-degree CS broadcasting can be arbitrarily selected and viewed on a television receiver (TV) 27.

  On the other hand, the broadcast signal F in the band of 2.6 GHz or more divided by the dividing unit 20 is further divided by the dividing unit 21 into a broadcast signal D3 and a broadcast signal E3. These broadcast signals D3 and E3 are converted to specified frequencies by the frequency converters 22a and 22b, respectively, to become broadcast signals D4 and E4, amplified by the amplifiers 23b and 23c, and output from the output terminals 24b and 24c to the satellite switching device 28. Is output. The satellite switching device 28 selectively selects a broadcast signal determined by a contract among the JCSAT-3 (V), JCSAT-3 (H), JCSAT-4A (V), and JCSAT-4A (H). The selected broadcast signal is input to the CS tuner 29, whereby an arbitrary channel is selected and can be viewed on the television receiver 27.

The processing operation of the above configuration will be described below with reference to FIG.
First, as shown in FIG. 2, the transmission processor 5 of this system includes a terrestrial digital broadcast signal (broadcast signal A) in the 470 MHz to 770 MHz band, and a BS (Broadcast Satellite) in the 1032 MHz to 1489 MHz band that is frequency-converted by the LNB2. Broadcast signal (however, 1336 MHz to 1489 MHz is an extended area) (Broadcast signal B), 110 degree CS (Communication Satellite) right-handed (1595 MHz to 2071 MHz) / left-handed (2126 MHz to 2602 MHz) broadcast signal (Broadcast signal C) in the 1595 MHz to 2602 MHz band ) Is entered. Here, when a JCSAT-3 communication satellite broadcast signal (broadcast signal D) and a JCSAT-4A communication satellite broadcast signal (broadcast signal E) are input, it is converted to a frequency band of 2.6 GHz or less suitable for coaxial cable transmission. If this is the case, it will overlap with the signals of terrestrial digital broadcasting and BS / 110 degree CS digital broadcasting, so that it becomes impossible to mix and transmit in one system (same transmission line).

  Therefore, in the present invention, without converting the broadcast signals D and E to the intermediate frequency band, the frequency is directly converted to the high frequency band of 2.6 GHz or more which is an unused frequency band so as not to overlap each other, Mix with other broadcast signals. As a result, the signal becomes difficult to transmit with the coaxial cable, but here, since the electrical signal is converted into the optical signal and optical transmission is performed by the optical fiber 16, there is a problem that there is a difference in attenuation amount depending on the transmission frequency band. It has been resolved. Further, by limiting the signal to be transmitted to digital, the modulation degree per channel and the total modulation degree at the time of electrical / optical conversion are suppressed, and broadband digital broadcast signal light transmission can be performed more easily.

  As described above, since the digital broadcast signal transmission system of this embodiment can transmit all digital broadcasts with a single transmission configuration, the cost can be reduced by reducing the number of transmission media and the number of device configurations. Further, since a signal over a wide frequency band is transmitted by the optical transmission means, it is possible to perform transmission with low loss and high reliability without receiving external electric noise.

(Example)
FIG. 3 is a diagram showing a configuration when the digital broadcast signal transmission system shown in FIG. 1 is applied to an apartment house. In FIG. 3, the same parts as those in FIG.
3 is characterized in that an optical amplifier 31 and an optical splitter 32 are interposed in the middle of the optical fiber 16 to amplify an optical signal transmitted from the transmission processing device 5 and branch to a plurality of systems, for example, transmitted to each house It is in the point which was made to do. Also, here, in each house, each broadcast signal output from the reception processing device 17 passes through coaxial cables 33a, 33b, 33c, through distributors 34a, 34b, 34c, etc., which are in-house wiring facilities, and the television terminal 35a. , 35b, and 35c, and are input to the tuner 25 and the satellite switching device 28 in each system.

  In the broadcast signal transmission system having the above configuration, by providing the optical amplifier 31 and the optical splitter 32 in the middle, signal transmission to a plurality of reception processing devices can be easily performed. In addition, a dedicated device such as a set-top box is not required inside the house, and it can be handled in the same manner as a normal television receiver.

In addition, if the apartment is an apartment and an ultra-high-speed broadband line (FTTH) is already laid, sharing the same transmission medium will reduce the total cost of information and communication infrastructure in the apartment building, for example. Can do.
FIG. 4 shows frequency band divisions during optical transmission in the case of the above embodiment. In this way, as a result of being arranged in a frequency band that does not overlap with each other, it has already been impossible with a coaxial cable, but in this example, optical transmission using optical fiber is adopted, so broadband transmission is realized with low loss It becomes possible.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

1 is a block diagram showing the configuration of an embodiment of a digital broadcast signal transmission system according to the present invention. The figure for demonstrating the kind of digital broadcasting signal which can be received with the system of FIG. 1, and each band. The block diagram which shows the structure of the Example at the time of applying the digital broadcast signal transmission system of FIG. 1 to an apartment house. The figure which shows the frequency division of each broadcast signal on the optical signal produced | generated with the system shown in FIG.

Explanation of symbols

1 ... BS / 110 degree CS digital satellite broadcast receiving parabolic antenna (first satellite digital antenna),
2 ... frequency converter,
3. Antenna for receiving terrestrial digital TV broadcast (terrestrial digital antenna),
4 ... Booster,
5 ... transmission processing device,
6a, 6b ... CS digital satellite broadcast receiving parabolic antenna (second satellite digital antenna),
7a, 7b ... branching unit,
8a, 8b, 8c, 8d ... frequency converter,
9a, 9b, 10, 13 ... mixing unit,
11 ... amplifying unit,
12: Input terminal,
14 ... Electric-to-optical converter (E / O),
15: Optical output terminal,
16: Optical transmission line,
17. Reception processing device,
18: Optical input terminal,
19: Opto-electric conversion part (O / E),
20, 21 ... division part,
22a, 22b ... frequency converter,
23a, 23b, 23c ... amplifying unit,
24a, 24b, 24c ... output terminals,
25. Splitter,
26 ... Terrestrial digital / BS / 110 degree CS tuner,
27 ... Television receiver (TV),
28 ... satellite switching device,
29 ... CS tuner,
31: Optical amplifier,
32 ... optical splitter,
33a, 33b, 33c ... coaxial cable,
34a, 34b, 34c ... distributor
35a, 35b, 35c ... TV terminals.

Claims (5)

Band converting means for directly converting one or a plurality of 12 GHz band digital broadcast signals to an unused band of 2.6 GHz or more;
A mixing means for mixing the band-converted digital broadcast signal with another digital broadcast signal transmitted in a frequency band of 2.6 GHz or less;
Electrical / optical conversion means for converting the mixed digital broadcast signal into an optical signal;
An optical transmission means for transmitting the optical signal;
An optical / electrical conversion means for receiving an optical signal transmitted by the optical transmission means and converting it into an electrical signal;
Separating means for separating each of the digital broadcast signals mixed by the mixing means from the received optical signal;
A digital broadcast signal transmission system comprising frequency conversion means for converting the separated digital broadcast signals into input frequency bands of corresponding broadcast receiving devices.   The one or more digital broadcast signals in the 12 GHz band are a JCSAT-3 communication satellite broadcast 12.25 GHz to 12.73 GHz band vertical polarization signal, a 12.27 GHz to 12.75 GHz band horizontal polarization signal, JCSAT- 4A communication satellite broadcast signal 12.25 GHz to 12.73 GHz band vertical polarization signal and 12.27 GHz to 12.75 GHz band horizontal polarization signal, and transmitted in the frequency band of 2.6 GHz or less Other digital broadcast signals to be transmitted are 470 MHz to 770 MHz band broadcast signals for terrestrial digital broadcasts, 1032 MHz to 1489 MHz band broadcast signals for BS (Broadcast Satellite) broadcasts, and 1595 MHz to 2602 MHz bands for 110 degree CS (Communication Satellite) broadcasts. At least one of the converted right-handed and left-handed broadcast signals Digital broadcast signal transmission system according to claim 1, wherein a is.   2. The digital broadcast signal transmission system according to claim 1, wherein the optical transmission unit includes an optical distribution unit that distributes the optical signal to a plurality of systems. Band converting means for directly converting one or a plurality of 12 GHz band digital broadcast signals to an unused band of 2.6 GHz or more;
A mixing means for mixing the band-converted digital broadcast signal with another digital broadcast signal transmitted in a frequency band of 2.6 GHz or less;
A transmission processing apparatus for a digital broadcast signal transmission system, comprising: an electrical / optical conversion means for converting the mixed digital broadcast signal into an optical signal and sending it to an optical transmission line.   The one or more digital broadcast signals in the 12 GHz band are a JCSAT-3 communication satellite broadcast 12.25 GHz to 12.73 GHz band vertical polarization signal, a 12.27 GHz to 12.75 GHz band horizontal polarization signal, JCSAT- 4A communication satellite broadcast signal 12.25 GHz to 12.73 GHz band vertical polarization signal and 12.27 GHz to 12.75 GHz band horizontal polarization signal, and transmitted in the frequency band of 2.6 GHz or less Other digital broadcast signals to be transmitted are 470 MHz to 770 MHz band broadcast signals for terrestrial digital broadcasts, 1032 MHz to 1489 MHz band broadcast signals for BS (Broadcast Satellite) broadcasts, and 1595 MHz to 2602 MHz bands for 110 degree CS (Communication Satellite) broadcasts. At least one of the converted right-handed and left-handed broadcast signals Transmission processing apparatus of a digital broadcasting signal transmission system according to claim 4, characterized in that.

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