JP2019176298A - Transformer module unit, cable television broadcast apparatus using the same, control method, and cable television broadcasting method - Google Patents

Abstract

To provide a transformer module unit capable of receiving a satellite broadcasting of a different resolution in 2K, 4K, and 8K by one kind unit, and receiving a plurality of programs provided through one transponder by one unit, a cable television broadcasting apparatus using the same, a control method, and a cable television broadcasting method.SOLUTION: A transformer module unit is a unit corresponding to one transponder for a satellite broadcasting, and comprises: a reception part in which a signal transmitted from one transponder is input as an input signal, and which fetch data of a plurality of programs contained in the input signal to output them; a conversion part that converts output data of the reception part to data for a cable television distribution; and an output part that generates an RF signal having a frequency corresponding to each program from the data converted by the conversion part and outputs them.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a transformer module unit, a cable television broadcasting device using the transformer module unit, a control method, and a cable television broadcasting method.

  Digital television broadcasting (BS broadcasting and CS broadcasting) is performed by a transponder mounted on an artificial satellite. Currently, with regard to BS broadcasts, standard television broadcasts (hereinafter also referred to as 2K broadcasts) are being carried out as practical broadcasts, and high-definition television broadcasts (hereinafter also referred to as 4K broadcasts) and ultra-high definition as test broadcasts. Television broadcasting (hereinafter also referred to as 8K broadcasting) is also being carried out. Since December 2018, 4K and 8K broadcasts are planned for practical use. Along with this, the current BS broadcast program will be reorganized.

  FIG. 1 and FIG. 2 show the channel arrangement of a planned BS broadcast television program (see Non-Patent Document 1 below). 1 and 2 reproduce the channel arrangement diagram disclosed in Non-Patent Document 1 as faithfully as possible in order to accurately indicate the background art, and include registered trademarks. FIG. 1 shows a broadcast by a transponder that outputs a radio wave whose polarization plane rotates to the right (hereinafter referred to as right-hand rotation) among 23 transponders mounted on the satellite. FIG. 2 is broadcast by a transponder that outputs a radio wave whose polarization plane rotates to the left (hereinafter referred to as “left-handed”). Channels 1ch to 23ch correspond to transponders and output radio waves of a predetermined frequency. Odd numbered channels (hereinafter referred to as odd channels) shown in FIG. 1 are assigned to transponders that use right-handed radio waves. An even-numbered channel (hereinafter referred to as an even channel) shown in FIG. 2 is assigned to a transponder that uses a left-handed radio wave.

  For example, three programs provided by different broadcasting stations are assigned to one channel (1ch) in FIG. That is, three programs are provided by one transponder. Two programs provided by one broadcasting station are assigned to the five channels (5ch) in FIG. That is, two programs are provided by one transponder. In this specification, “channel” is used to specify a transponder (frequency), and “program” corresponds to a so-called television broadcast channel. It does not mean a so-called program that provides sound.

  In the channel arrangement diagrams of FIGS. 1 and 2, those with a shaded background are those for which 4K or 8K broadcasting is planned. What is not shaded in the background is a broadcast with the same resolution as the current digital broadcast. For example, for 7 channels (7ch) and 17 channels (17ch) in FIG. 1, three programs of 4K broadcast are provided by one transponder. The same applies to the eight channels (8ch) in FIG. 14 channels (14ch) in FIG. 2 are provided with one 8K broadcast program by one transponder.

  Accordingly, in cable television stations (hereinafter also referred to as CATV stations) that provide cable television broadcast (hereinafter also referred to as CATV broadcast) services, these channel reorganizations and different resolutions of 2K, 4K, and 8K (ie, It is necessary to cope with mixed broadcasting of different data formats.

  The following Non-Patent Document 2 proposes two types of units (1 slot type and 2 slot type) capable of receiving 4K and 8K broadcasts corresponding to each program and capable of CATV distribution. These units are used by being mounted in a slot of a rack mount housing (hereinafter also referred to as subrack). One slot type unit can receive one 4K broadcast program by one unit, rewrite the TLV stream of BS-IF, and output by 256QAM modulation. Although it is possible to receive 8K broadcasting using a 1-slot type unit, it is necessary that the output frequency of 256QAM is continuous for 3QAM (or the output frequency of 64QAM is 4QAM). If it is a 2-slot type unit, 8K broadcast can be received by one unit even if the frequency is not continuous.

"Current Status of Satellite Broadcasting [Fourth Quarter of 2017]", [online] January 1, 2018, Ministry of Internal Affairs and Communications, Information Sharing Administration, Satellite / Regional Broadcasting Division, [Search on March 19, 2018], Internet <URL: http://www.soumu.go.jp/main_sosiki/joho_tsusin/eisei/eisei.pdf> “4K / 8K practical broadcasting” new product lineup “Proposal of equipment to prevent wave breaks with RF / IP redundancy”, Monthly New Media, New Media Co., Ltd. December 1, 2017, January 2018 issue , Pp.34-37 "Digital Cable Television Broadcasting" Proposal for Advanced Transmission Methods for Introduction of Ultra-High-Definition Television Broadcasting in Cable Television "Interim Report (draft)", [online] Japan CATV Technology Association Standards / Standardization Committee [Search on March 19, 2018] Internet <URL: http://www.soumu.go.jp/main_content/000317625.pdf>

  In the unit proposed in Non-Patent Document 2, one unit is required for each program, and a very large number of units are required in order to be able to handle all programs broadcast on BS. . In addition, a 1-slot type unit has a limitation in receiving 8K broadcast, and a different type of 2-slot type unit is required to receive 8K broadcast without limitation. Therefore, it is necessary to use a large rack or a plurality of racks in order to accommodate these units in a plurality of sub-rack and to mount the sub-rack on the rack. There is a problem to occupy.

  Therefore, the present invention can receive satellite broadcasts with different resolutions of 2K, 4K, and 8K by one type of unit, and a transformer that can receive a plurality of programs provided by one transponder by one unit. It is an object of the present invention to provide a module unit, a cable television broadcasting device using the module unit, a control method, and a cable television broadcasting method.

  A trans module unit according to an aspect of the present invention is a unit corresponding to one transponder for satellite broadcasting, and a signal transmitted from the transponder for satellite broadcasting is input as an input signal and is included in the input signal. A receiver that extracts and outputs data of a plurality of programs, a converter that converts the output data of the receiver into data for cable television distribution, and a frequency corresponding to each program from the data converted by the converter And an output unit that generates and outputs an RF signal having

  According to another aspect of the present invention, there is provided a control method, wherein a satellite broadcast signal including a plurality of program data in one carrier wave is used as an input signal, and a plurality of program data are extracted from the input signal. An output reception step, a conversion step for converting output data from the reception step into data for cable television distribution, and an RF signal having a frequency corresponding to each program is generated and output from the data converted by the conversion step Output step.

  According to the present invention, a plurality of programs provided by one transponder can be received by one trans module unit.

FIG. 1 is a channel arrangement diagram of a television program of a planned BS broadcast (right-handed, odd channel). FIG. 2 is a channel arrangement diagram of a planned television program of BS broadcasting (left-handed, even channel). FIG. 3 is a block diagram showing a configuration of the transformer module unit according to the embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of the first selector of FIG. FIG. 5 is a block diagram showing the configuration of the second selector of FIG. FIG. 6 is a block diagram showing an operation example of CATV distribution using the transformer module unit of FIG. FIG. 7 is a block diagram showing an operation example different from FIG. FIG. 8 is a block diagram showing an operation example different from FIGS. FIG. 9 is a block diagram illustrating an operation example different from those in FIGS. FIG. 10 is a block diagram showing an operation example different from those shown in FIGS. FIG. 11 is a perspective view showing a subrack containing a plurality of transformer module units.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described. You may combine arbitrarily at least one part of embodiment described below.

  (1) A transformer module unit according to the first aspect of the present invention is a unit corresponding to one transponder for satellite broadcasting, and a signal transmitted from the transponder for satellite broadcasting is input as an input signal. A receiving unit that extracts and outputs data of a plurality of programs included in an input signal, a conversion unit that converts output data of the receiving unit into data for cable television distribution, and a program based on data converted by the conversion unit And an output unit that generates and outputs an RF signal having a frequency corresponding to each. Accordingly, a plurality of programs provided by one transponder can be received by one trans module unit and distributed by CATV.

  (2) A transformer module unit according to a second aspect of the present invention includes a tuner unit that receives a satellite broadcast signal including a plurality of program data in one carrier wave, and an output from the tuner unit. A separation unit that separates and outputs the data of each of a plurality of programs from the signal, a rewriting unit that rewrites the NIT included in the output data of the separation unit, and TSMF data or extended TSMF from the data in which the NIT is rewritten by the rewriting unit TSMF generator for generating and outputting data, modulator for QAM modulation of output data of TSMF generator, and RF output unit for outputting QAM-modulated data by a carrier having a frequency corresponding to each program Including. Thereby, it is possible to cope with 2K, 4K and 8K satellite broadcasts with different resolutions with one type of transformer module unit.

  (3) A transformer module unit according to a third aspect of the present invention includes a tuner unit that receives a satellite broadcast signal including a plurality of program data in one carrier wave, and an output signal of the tuner unit. Outputs the data of each of a plurality of programs separated from each other, three TSMF generators, four modulators, and the output data of the modulators using carrier waves of frequencies corresponding to the respective programs. Each of the three TSMF generators generates and outputs TSMF data or extended TSMF data from the data separated by the separator, and each of the four modulators includes a TSMF generator. Output data after QAM modulation. Thereby, a transformer module unit can be comprised compactly.

  (4) The cable television broadcasting apparatus according to the fourth aspect of the present invention can include the same number of transmodule units as the number of transponders that transmit right-handed radio waves for satellite broadcasting. Thereby, a cable television broadcasting apparatus can be comprised compactly.

  (5) Preferably, the number of the plurality of programs is three or more, and the modulation unit included in the output unit selects and executes either 64QAM modulation or 256QAM modulation. Thereby, it is possible to flexibly cope with 2K, 4K and 8K satellite broadcasts having different resolutions.

  (6) A control method according to the fifth aspect of the present invention uses a satellite broadcast signal including a plurality of program data in one carrier wave as an input signal, and a plurality of program data from the input signal. A reception step for extracting and outputting the data, a conversion step for converting output data from the reception step into data for cable television distribution, and an RF signal having a frequency corresponding to each program from the data converted by the conversion step. Generating and outputting. Thereby, a plurality of programs provided by one transponder can be received.

  (7) Preferably, the receiving step includes a tuning step for generating and outputting digital data from an input signal, and a separation step for separating and outputting data of each of a plurality of programs from the digital data output by the tuning step. The conversion step includes a rewriting step for rewriting the NIT included in the data separated by the separation step, and a TSMF for generating and outputting TSMF data or extended TSMF data from the data separated by the separation step The output step includes a modulation step for QAM modulating the output data from the TSMF generation step, and an RF output step for outputting the data QAM modulated by the modulation step by a carrier wave having a frequency corresponding to each program. Including. Thereby, it is possible to cope with 2K, 4K, and 8K satellite broadcasts having different resolutions.

  (8) More preferably, for one separation step, three or less TSMF generation steps are executed in parallel, and four or less modulation steps are executed in parallel. Thereby, a compact control method can be realized.

  (9) A cable television broadcasting method according to the sixth aspect of the present invention is a method of inputting transmission signals from a plurality of satellite broadcast transponders and generating and outputting an RF signal having a frequency corresponding to a program. Then, the above control method is executed for the transponder transmission signal in units of transponders. Thereby, a compact cable television broadcasting method can be realized.

  (10) Preferably, the number of the plurality of programs is three or more, and in the modulation step included in the output step, either 64QAM modulation or 256QAM modulation is selected and executed. Thereby, it is possible to flexibly cope with 2K, 4K and 8K satellite broadcasts having different resolutions.

[Details of the embodiment of the present invention]
In the following embodiments, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

(Embodiment)
[overall structure]
Referring to FIG. 3, a transformer module unit 100 according to an embodiment of the present invention includes a tuner unit 102 to which a BS-IF signal is input, an analysis / separation unit 104, an NIT rewriting unit 110, and a first selector 120. A TSMF generation unit 130, a second selector 140, a QAM modulation unit 150, and an RF output unit 160. The NIT rewriting unit 110 includes a first NIT rewriting unit 112, a second NIT rewriting unit 114, and a third NIT rewriting unit 116 that rewrite the NIT included in input data (packet data). The TSMF generation unit 130 includes a first TSMF generation unit 132, a second TSMF generation unit 134, and a third TSMF generation unit 136 that generate TSMF data from input data. The QAM modulation unit 150 includes a first QAM modulation unit 152, a second QAM modulation unit 154, a third QAM modulation unit 156, and a fourth QAM modulation unit 158 that perform QAM modulation on input data and output the data. The RF output unit 160 includes a first RF output unit 162, a second RF output unit 164, a third RF output unit 166, and a fourth RF output unit 168 that generate and output an RF signal by placing input data on a predetermined carrier wave. .

The tuner unit 102 receives a BS-IF signal having an intermediate frequency obtained by down-converting a signal (about 12 GHz) received by the BS antenna. The tuner unit 102 receives TMCC (Transmission and Multiplexing) from the input signal.
Configuration control) and data including TLV (Type-length Value) format data (or TS format data) are generated and output. In BS broadcasting, video, audio, and other data are converted into TS packets, information such as TMCC is added, encoded, modulated, and time-division multiplexed, and transmitted as radio waves.

  The analysis / separation unit 104 refers to TMCC to generate TLV data (or TS data) of each program from the input data, and the first NIT rewriting unit 112, the second NIT rewriting unit 114, and the third NIT of the NIT rewriting unit 110. Input to the rewriting unit 116. Data of one program is input to each of the first NIT rewriting unit 112, the second NIT rewriting unit 114, and the third NIT rewriting unit 116.

  Since the data input to the first NIT rewriting unit 112 includes an NIT (Network Information Table) for BS broadcasting, the first NIT rewriting unit 112 rewrites the NIT included in the input data for CATV distribution. . The NIT includes information for specifying a transponder, a program (corresponding to a so-called channel), and the like. The data output from the first NIT rewriting unit 112 is the same as the input data except that the NIT is rewritten. Similarly, the second NIT rewriting unit 114 and the third NIT rewriting unit 116 rewrite the NIT included in the input data for CATV distribution and output it. The outputs of the first NIT rewriting unit 112, the second NIT rewriting unit 114, and the third NIT rewriting unit 116 are input to the first selector 120.

  The first selector 120 distributes a plurality of input data and inputs them to the first TSMF generator 132, the second TSMF generator 134, and the third TSMF generator 136 included in the TSMF generator 130. As will be described later, the first selector 120 converts each input signal into a first TSMF generator 132, a first TSMF generator 132, and a first TSMF generator 132 according to the number of programs included in the signal received by the tuner unit 102 and the image resolution (2K, 4K, or 8K). Which of the 2TSMF generator 134 and the third TSMF generator 136 is to be input is determined.

  The first TSMF generator 132, the second TSMF generator 134, and the third TSMF generator 136 multiplex input data to generate and output known TSMF (Transport Streams Multiplexing Frame) data. In addition to the TSMF generation function, the first TSMF generation unit 132 can multiplex input data to generate extended TSMF (Extended TSMF) data. The extended TSMF data format is proposed in Non-Patent Document 3, for example. The extended TSMF is for performing 8K broadcasting using a plurality of carriers at intervals of 6 MHz of CATV broadcasting, and has a frame structure in which extended information is added to the TSMF.

  The second selector 140 distributes a plurality of input data and inputs them to the first QAM modulation unit 152, the second QAM modulation unit 154, the third QAM modulation unit 156, and the fourth QAM modulation unit 158 included in the QAM modulation unit 150. As will be described later, the second selector 140 converts each input signal into the first QAM modulation unit 152, the first QAM modulation unit 152, and the number of programs included in the signal received by the tuner unit 102 and the image resolution (2K, 4K, or 8K). Which of the 2QAM modulation unit 154, the third QAM modulation unit 156, and the fourth QAM modulation unit 158 is input is determined.

  The first QAM modulation unit 152 performs 256QAM modulation or 64QAM modulation on input data and outputs the result. The first QAM modulation unit 152 has functions of 256QAM modulation and 64QAM modulation, but executes only one of them under external control (or set in hardware). Similarly, the second QAM modulation unit 154 and the third QAM modulation unit 156 perform 256 QAM modulation or 64 QAM modulation. The fourth QAM modulator 158 performs 64QAM modulation. The data QAM modulated by the first QAM modulation unit 152, the second QAM modulation unit 154, the third QAM modulation unit 156, and the fourth QAM modulation unit 158 respectively correspond to the corresponding first RF output unit 162, second RF output unit 164, and third RF output unit. 166 and the fourth RF output unit 168.

  The first RF output unit 162, the second RF output unit 164, the third RF output unit 166, and the fourth RF output unit 168 each generate and output an RF signal for transmitting input data using a carrier wave having a predetermined frequency. The frequencies of the RF signals output from the first RF output unit 162, the second RF output unit 164, the third RF output unit 166, and the fourth RF output unit 168 are different from each other. The RF signals output from the first RF output unit 162, the second RF output unit 164, the third RF output unit 166, and the fourth RF output unit 168 are all combined (RFout), amplified, and distributed via the cable for CATV. .

[Configuration of selector]
The function of the first selector 120 will be described with reference to FIG. The first selector 120 includes a first switch unit 122, a second switch unit 124, and a third switch unit 126. Output data of the first NIT rewriting unit 112, the second NIT rewriting unit 114, and the third NIT rewriting unit 116 are input to the first switch unit 122, the second switch unit 124, and the third switch unit 126, respectively. The first switch unit 122 has a function of turning on / off each of the three input signals under external control (or hardware setting). When ON, the input signal is output as it is, and when OFF, the input signal is not output. Therefore, the first TSMF generation unit 132 may receive all the outputs of the first NIT rewriting unit 112, the second NIT rewriting unit 114, and the third NIT rewriting unit 116. Each of the second switch unit 124 and the third switch unit 126 receives a control from the outside (or is set in hardware) and selects one of the three input signals, and the selected signal Has a function to turn ON / OFF the. The selected signal is output when ON, but not output when OFF.

  The function of the second selector 140 will be described with reference to FIG. The second selector 140 includes a fourth switch unit 142, a sixth switch unit 146, and a seventh switch unit 148. The fourth switch unit 142 has a function of receiving a maximum of four outputs from the first TSMF generation unit 132 and receiving any one from the outside under control (or set in hardware). . Each of the fifth switch unit 144 and the sixth switch unit 146 has a function of outputting one of two inputs under external control (or set in hardware). The seventh switch unit 148 has a function of turning on / off the input under external control (or hardware setting).

  3 to 5 can be realized by using a semiconductor IC including an ASIC, FPGA, and the like. Each element can be composed of a single semiconductor IC, or a plurality of elements can be composed of a single semiconductor IC. For example, the transformer module unit 100 can be formed in a form that can be mounted in one slot of a rack mount subrack.

  The functions of the elements in FIGS. 3 to 5 may be realized by a software program using a CPU and a semiconductor memory. Further, it may be realized by a combination of a semiconductor IC and a software program. Realization by FPGA can also be said to be realization by software program. Corresponding to a configuration in which a plurality of transmodule units are mounted on the subrack, a plurality of software programs (for example, the same number as the number of transponders) are executed in parallel in order to generate data for CATV distribution from a transmission signal of one transponder Is possible.

  Since the transformer module unit 100 is configured in this way, it can correspond to various program configurations shown in FIGS. 1 and 2. Hereinafter, an operation example of the transformer module unit 100 will be specifically described.

[Operation Example 1]
With reference to FIG. 6, a case will be described in which three programs (standard television broadcast) provided by 1ch of FIG. 1 are received and RF output as CATV data. In FIG. 6, a solid line arrow means that data exists (a significant signal flows on the wiring), and a broken line arrow indicates that no data exists (the wiring exists but no significant signal flows). Means that. Thus, signal selection and ON / OFF control in each switch unit are shown. Also, among the four modulation units of the QAM modulation unit 150, the type of QAM modulation that is selected is shown in parentheses.

  The three programs provided in 1ch are separated into data of each program by the analysis / separation unit 104, the data of one program is input to the first NIT rewriting unit 112, and the data of another one program is the second NIT rewriting unit. The data of the remaining one program is input to the third NIT rewriting unit 116. In this case, output data from the first NIT rewriting unit 112 is input to the first TSMF generation unit 132 by the first switch unit 122, and output data from the second NIT rewriting unit 114 is input to the second TSMF generation unit by the second switch unit 124. The output data from the third NIT rewriting unit 116 is input to the third TSMF generation unit 136 by the third switch unit 126. The first TSMF generator 132, the second TSMF generator 134, and the third TSMF generator 136 each generate TSMF data from the input data and output it.

  The output data of the first TSMF generator 132, the second TSMF generator 134, and the third TSMF generator 136 are respectively output from the first QAM modulator 152 and the second QAM by the fourth switch 142, the fifth switch 144, and the sixth switch 146. The signals are input to the modulation unit 154 and the third QAM modulation unit 156. The first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 each modulate and output the input data by 64QAM. In this case, the fourth QAM modulator 158 is not used. The outputs of the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 are input to the corresponding first RF output unit 162, second RF output unit 164, and third RF output unit 166, respectively, and RF signals of three carriers Is generated.

[Operation Example 2]
With reference to FIG. 7, a case where one program (8K broadcast) provided by 14ch in FIG. 2 is received and RF output as CATV data will be described. The meanings of the solid arrow and the broken arrow are the same as those in FIG. Thus, signal selection and ON / OFF control in each switch unit are shown. Also, among the four modulation units of the QAM modulation unit 150, the type of QAM modulation that is selected is shown in parentheses. For the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156, 256QAM modulation may be selected or 64QAM modulation may be selected.

  Since one program is provided in 14ch, the data separated by the analysis separation unit 104 is input to the first NIT rewriting unit 112. Data is not input to the second NIT rewriting unit 114 and the third NIT rewriting unit 116. In this case, output data from the first NIT rewriting unit 112 is input to the first TSMF generation unit 132 by the first switch unit 122. The first TSMF generator 132 generates extended TSMF data from input data, and distributes and outputs the expanded TSMF data to four output lines or three output lines in packet units.

  For transmission of 8K data, 256QAM modulation and 64QAM modulation can be used. In the case of 256QAM modulation, 8-bit data can be sent in one modulation, and in the case of 64QAM modulation, 6-bit data can be sent in one modulation. Since the ratio of the data transmission rate is 4: 3, when 256QAM modulation is used, transmission is performed using three-wave RF signals, and when 64QAM modulation is used, transmission is performed using four-wave RF signals.

  When 256QAM modulation is used, the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 are set to perform 256QAM modulation, and the first TSMF generation unit 132 outputs the extended TSMF data on three output lines. And is input to the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 through the fourth switch unit 142, the fifth switch unit 144, and the sixth switch unit 146, respectively. In this case, the fourth QAM modulator 158 is not used. The outputs of the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 are input to the corresponding first RF output unit 162, second RF output unit 164, and third RF output unit 166, respectively, and RF signals of three carriers Is generated. Thus, in the case of 256QAM modulation, 8K CATV broadcasting can be provided using three waves.

  On the other hand, when 64QAM modulation is used, the first QAM modulator 152, the second QAM modulator 154, the third QAM modulator 156, and the fourth QAM modulator 158 are set to execute 64QAM modulation, and the first TSMF generator 132 is expanded. The TSMF data is output through four output lines, and the first QAM modulation unit 152 and the second QAM modulation unit 154 are respectively passed through the fourth switch unit 142, the fifth switch unit 144, the sixth switch unit 146, and the seventh switch unit 148. The third QAM modulation unit 156 and the fourth QAM modulation unit 158 are input. The outputs of the first QAM modulation unit 152, the second QAM modulation unit 154, the third QAM modulation unit 156, and the fourth QAM modulation unit 158 are the corresponding first RF output unit 162, second RF output unit 164, third RF output unit 166, and fourth RF output. The signal is input to the unit 168, and RF signals of four carriers are generated. Thus, in the case of 64QAM modulation, 8K CATV broadcasting can be provided using four waves.

[Operation Example 3]
Referring to FIG. 8, a case will be described in which one program out of the three programs (4K broadcast) provided by 17ch in FIG. 1 is received and provided as CATV data with two-wave RF output. The meanings of the solid line arrows and the broken line arrows are the same as those in FIGS. Thus, signal selection and ON / OFF control in each switch unit are shown. Of the four modulation units of the QAM modulation unit 150, the type of QAM modulation selected is shown in parentheses.

  The three programs provided by 17ch are separated into data of each program by the analysis / separation unit 104, the data of one program is input to the first NIT rewriting unit 112, and the data of another one program is the second NIT rewriting unit. The data of the remaining one program is input to the third NIT rewriting unit 116. Here, the output data from the first NIT rewriting unit 112 is input to the first TSMF generating unit 132 by the first switch unit 122, but the output data from the second NIT rewriting unit 114 and the third NIT rewriting unit 116 is the second data It is turned off by the switch unit 124 and the third switch unit 126 and is not output. The first TSMF generator 132 generates extended TSMF data from the input data, and distributes and outputs the extended TSMF data to two output lines in units of packets. The output of the first TSMF generator 132 is input to the first QAM modulator 152 and the second QAM modulator 154 via the fourth switch unit 142 and the fifth switch unit 144, respectively.

  Each of the first QAM modulator 152 and the second QAM modulator 154 performs 64QAM modulation on the input data. Output data of the first QAM modulation unit 152 and the second QAM modulation unit 154 are respectively input to the corresponding first RF output unit 162 and second RF output unit 164, and RF signals of two carrier waves are generated.

  In this operation mode, three transformer module units 100 are required to receive all 17ch 3 programs (4K broadcasts) and provide them as CATV data with two-wave RF output.

[Operation Example 4]
With reference to FIG. 9, a case will be described in which three programs (4K broadcast) provided by 17ch in FIG. 1 are received and RF-output as CATV data. In this operation example, unlike the operation example 3, all three programs can be provided by one transformer module unit 100. The meanings of solid arrows and broken arrows are the same as those in FIGS. Thus, signal selection and ON / OFF control in each switch unit are shown. Of the four modulation units of the QAM modulation unit 150, the type of QAM modulation selected is shown in parentheses.

  The three programs provided by 17ch are separated into data of each program by the analysis / separation unit 104, the data of one program is input to the first NIT rewriting unit 112, and the data of another one program is the second NIT rewriting unit. The data of the remaining one program is input to the third NIT rewriting unit 116. Output data from the first NIT rewriting unit 112, the second NIT rewriting unit 114, and the third NIT rewriting unit 116 are all input to the first TSMF generation unit 132 by the first switch unit 122. The first TSMF generator 132 generates extended TSMF data from data input from all three input lines, and distributes and outputs the expanded TSMF data to four output lines in packet units.

  Subsequent signal processing is the same as when 64QAM modulation is used in Operation Example 2 for 8K broadcasting. That is, the first QAM modulation unit 152, the second QAM modulation unit 154, the third QAM modulation unit 156, and the fourth QAM modulation unit 158 are set to perform 64QAM modulation, and the first TSMF generation unit 132 converts the extended TSMF data into four output lines. To output. The four lines of output data are sent through the fourth switch unit 142, the fifth switch unit 144, the sixth switch unit 146, and the seventh switch unit 148, respectively, to the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation. And the fourth QAM modulation unit 158. The outputs of the first QAM modulation unit 152, the second QAM modulation unit 154, the third QAM modulation unit 156, and the fourth QAM modulation unit 158 are the corresponding first RF output unit 162, second RF output unit 164, third RF output unit 166, and fourth RF output. The signal is input to the unit 168, and RF signals of four carriers are generated. Thus, in the case of 64QAM modulation, 3 programs of 4K can be provided as CATV broadcasts using 4 waves.

[Operation Example 5]
With reference to FIG. 10, a case where three programs (4K broadcast) provided in 17ch of FIG. 1 are received and RF output as CATV data will be described. In this operation example, unlike operation example 3, one transformer module unit 100 can provide all three programs, and unlike operation example 4, each program can be provided in one wave. The meanings of the solid line arrows and the broken line arrows are the same as those in FIGS. Thus, signal selection and ON / OFF control in each switch unit are shown. Of the four modulation units of the QAM modulation unit 150, the type of QAM modulation selected is shown in parentheses.

  The three programs provided by 17ch are separated into data of each program by the analysis / separation unit 104, the data of one program is input to the first NIT rewriting unit 112, and the data of another one program is the second NIT rewriting unit. The data of the remaining one program is input to the third NIT rewriting unit 116. Output data from the first NIT rewriting unit 112 is input to the first TSMF generation unit 132 by the first switch unit 122, and output data from the second NIT rewriting unit 114 is output to the second TSMF generation unit 134 by the second switch unit 124. Then, the output data from the third NIT rewriting unit 116 is input to the third TSMF generation unit 136 by the third switch unit 126. The first TSMF generator 132, the second TSMF generator 134, and the third TSMF generator 136 each generate TSMF data from the input data and output it.

  The output data of the first TSMF generator 132, the second TSMF generator 134, and the third TSMF generator 136 are respectively output from the first QAM modulator 152 and the second QAM by the fourth switch 142, the fifth switch 144, and the sixth switch 146. The signals are input to the modulation unit 154 and the third QAM modulation unit 156. The first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 each modulate the input data by 256QAM and output the result. The fourth QAM modulation unit 158 is not used. The outputs of the first QAM modulation unit 152, the second QAM modulation unit 154, and the third QAM modulation unit 156 are input to the corresponding first RF output unit 162, second RF output unit 164, and third RF output unit 166, respectively, and RF signals of three carriers Is generated. As described above, in the case of 256QAM modulation, each of 3 programs of 4K can be provided as CATV broadcasting using one wave (total of three waves).

  Each channel shown in FIG. 1 and FIG. 2 can be handled by any one of the above operation examples 1, 2, 4, and 5. For example, with respect to 7ch and 8ch, since 3 programs of 4K broadcast are provided in the same way as 17ch, operation example 4 or operation example 5 can be used. In addition, for channels on which 3 programs of standard television broadcasting such as 3ch, 13ch, and 15ch are provided, the operation example 1 can deal with the channel as in the case of 1ch. Operation example 1 can also deal with 5ch providing two programs. As described above, 14ch providing 8K broadcasting can be handled by the operation example 2.

  Regarding 12ch, in the situation where one program is provided, any of the operation examples 2 to 4 can be handled, and if 3 programs of 4K broadcast are provided as in the case of 17ch, the operation example 4 or the operation example 5 can cope. Regarding unused 2ch, 4ch, etc., if provision with any of the above resolutions and the number of programs is started, it should be handled in any one of operation examples 1, 2, 4 and 5 in the same manner. Can do.

  When a plurality of transformer module units 100 are provided, the combined RF signal output from each transformer module unit 100 is further combined with the combined RF signal output from another transformer module unit 100, Get supplied on CATV cable.

[effect]
A plurality of programs provided by one transponder can be received by one trans module unit and distributed by CATV. In particular, for each channel (transponder) of BS broadcasting that is scheduled after December 2018 and has a mixture of 2K, 4K, and 8K broadcasts with different resolutions, one type of trans module unit can be used.

  By configuring so as to include three TSMF generation units and four modulation units with respect to one separation unit, the transformer module unit can be configured compactly.

  If the same number of trans-module units as the BS broadcast transponders are prepared as shown in FIG. 11, for example, all BS broadcasts can be handled. Compared with the case where one unit is provided for each BS broadcast program. Thus, the CATV broadcast facility can be made much more compact. Referring to FIG. 11, subrack 202 can accommodate a plurality of transformer module units 200. In the units 204 and 206, for example, a power source or the like is disposed. The subrack 202 is, for example, 3U high and can be mounted on a 19-inch rack. Each transformer module unit 200 is formed in a practical form that can be mounted in the slot of the subrack 202. Thus, in the case of the subrack 202 that can be mounted on a 19-inch rack, which is an industry standard, the number that can accommodate the transformer module units 200 of practical design is “12”. Strangely, this coincides with the number of transponders (transponders that transmit BS radio right-handed radio waves) to which odd-numbered channels of BS broadcasting shown in FIG. 1 are assigned. That is, with the configuration shown in FIG. 11, all programs transmitted by twelve transponders assigned with odd-numbered BS broadcast channels scheduled to be broadcast after December 2018 are received and used for CATV distribution. Data can be generated.

  Even if the number of programs included in the transmission signal from each transponder is 3 or more, the resolution is different by configuring the modulation unit to select and execute either 64QAM modulation or 256QAM modulation. It can flexibly support 2K, 4K, and 8K satellite broadcasting.

  In the above description, the case where the TSMF data or the extended TSMF data is generated from the data after the NIT is rewritten with the configuration shown in FIG. 3 is not limited to this. The rewriting of NIT and the generation of TSMF data or extended TSMF data may be performed before QAM modulation, and the order thereof is arbitrary.

  In the above description, a case has been described in which one trans module unit receives BS broadcast and performs CATV distribution with respect to one transponder for BS broadcast. However, the present invention is not limited to this. Similarly, for CS broadcasting, one transformer module unit for one transponder can be realized.

  As mentioned above, although this invention was demonstrated by describing embodiment, above-described embodiment is an illustration, Comprising: This invention is not necessarily restricted only to above-described embodiment. The scope of the present invention is indicated by each claim of the claims after taking into account the description of the detailed description of the invention, and all modifications within the meaning and scope equivalent to the wording described therein are included. Including.

100, 200 Trans module unit 102 Tuner unit 104 Analysis separation unit 110 NIT rewriting unit 112 First NIT rewriting unit 114 Second NIT rewriting unit 116 Third NIT rewriting unit 120 First selector 122 First switch unit 124 Second switch unit 126 Third switch Unit 130 TSMF generation unit 132 first TSMF generation unit 134 second TSMF generation unit 136 third TSMF generation unit 140 second selector 142 fourth switch unit 144 fifth switch unit 146 sixth switch unit 148 seventh switch unit 150 QAM modulation unit 152 first 1QAM modulation unit 154 2nd QAM modulation unit 156 3rd QAM modulation unit 158 4th QAM modulation unit 160 RF output unit 162 1st RF output unit 164 2nd RF output unit 166 3rd RF output unit 168 4th RF output unit 202 Subrack 20 4,206 units

Claims (10)

A unit corresponding to one transponder for satellite broadcasting,
A receiver that receives a signal transmitted from the transponder for satellite broadcasting as an input signal, and extracts and outputs data of a plurality of programs included in the input signal;
A converter that converts the output data of the receiver into data for cable television distribution;
A transformer module unit, comprising: an output unit that generates and outputs an RF signal having a frequency corresponding to each of the programs from the data converted by the conversion unit. A tuner unit that receives a satellite broadcast signal that includes a plurality of program data in one carrier wave;
A separation unit that separates and outputs data of each of the plurality of programs from an output signal of the tuner unit;
A rewriting unit for rewriting the NIT included in the output data of the separation unit;
A TSMF generation unit that generates and outputs TSMF data or extended TSMF data from the data in which the NIT is rewritten by the rewriting unit;
A modulator for QAM modulating the output data of the TSMF generator;
A transformer module unit, comprising: an RF output unit that outputs data QAM-modulated by the modulation unit using a carrier wave having a frequency corresponding to each of the programs. A tuner unit that receives a satellite broadcast signal that includes a plurality of program data in one carrier wave;
One separation unit for separating and outputting data of each of the plurality of programs from the output signal of the tuner unit;
Three TSMF generators;
Four modulators,
An RF output unit for outputting the output data of the modulation unit by a carrier wave having a frequency corresponding to each of the programs;
Each of the three TSMF generators generates and outputs TSMF data or extended TSMF data from the data separated by the separator,
Each of the four modulation units is a transformer module unit that QAM modulates the output data of the TSMF generation unit and outputs the result.   A cable television broadcasting apparatus capable of mounting the same number of transponder units as claimed in any one of claims 1 to 3 as the number of transponders transmitting a right-handed radio wave for satellite broadcasting. The number of the plurality of programs is 3 or more;
The cable television broadcasting apparatus according to claim 4, wherein the modulation unit included in the output unit selects and executes either 64QAM modulation or 256QAM modulation. Receiving a satellite broadcast signal including a plurality of program data included in one carrier wave as an input signal, extracting a plurality of program data from the input signal, and outputting each of the data;
A conversion step of converting the output data from the reception step into data for cable television distribution;
An output step of generating and outputting an RF signal having a frequency corresponding to each of the programs from the data converted by the conversion step. The receiving step includes
A tuning step of generating and outputting digital data from the input signal;
A separation step of separating and outputting data of each of the plurality of programs from the digital data output by the tuning step,
The converting step includes
A rewriting step of rewriting the NIT included in the data separated by the separation step;
A TSMF generation step of generating and outputting TSMF data or extended TSMF data from the data separated by the separation step,
The output step includes
A modulation step of QAM modulating the output data by the TSMF generation step;
7. The control method according to claim 6, further comprising: an RF output step of outputting the QAM-modulated data by the modulation step using a carrier wave having a frequency corresponding to each of the programs.   The control method according to claim 7, wherein three or less TSMF generation steps are executed in parallel with respect to one of the separation steps, and four or less modulation steps are executed in parallel. A method of inputting transmission signals from a plurality of transponders for satellite broadcasting and generating and outputting an RF signal having a frequency corresponding to a program,
A cable television broadcasting method for executing the control method according to any one of claims 6 to 8 on a transmission signal of the transponder in units of the transponder. The number of the plurality of programs is 3 or more;
The cable television broadcasting method according to claim 9, wherein in the modulation step included in the output step, either 64QAM modulation or 256QAM modulation is selected and executed.

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