JP6042116B2 - Relay broadcast system - Google Patents

Description

The present invention relates to a technique suitable for use in a relay broadcast system that covers a relatively large area (for example, an island in Indonesia) that relays a broadcast wave in which broadcast data is placed on a specified segment (frequency).

One-seg broadcasting is a type of terrestrial digital broadcasting ISDB-T (Integrated Services Digital Broadcasting-Terrestrial), which is a type of partial segment broadcasting that transmits broadcast waves carrying broadcast data on specific frequencies (segments) within a transmission channel. One-segment broadcasting used in broadcasting for mobile terminals, so-called digital radio broadcasting (terrestrial digital audio broadcasting) of 3 segments (3 segments), and educational television broadcasting of 4 segments of SDTV (Standard Definition TeleVision) A method of broadcasting in partial segments of the total number of segments in a broadcast transmission channel is hereinafter referred to as partial segment broadcasting.
In addition, partial segment broadcasting such as one-segment broadcasting is suitable for implementation by the SFN (Single Frequency Network) method and broadcasting system (area broadcasting) that covers a relatively small area with a minute transmission power. This is expected to expand.
For example, when constructing a cover area for digital terrestrial broadcasting, if an attempt is made to construct a wide area in an SFN environment, it is necessary to construct an SFN environment by performing multistage relay of broadcast waves.
As shown in FIG. 11, in terrestrial digital broadcasting, broadcast waves emitted from a transmitting station (parent station) are relayed and transmitted at several relay transmitting stations, and multistage relaying by stable radio waves between transmitting stations is performed. Is easy to do.

  However, in terrestrial digital broadcasting, when the transmitting station (parent station, higher station) and relay transmitting station (relay station) are located in urban areas or mountainous areas, as shown in FIG. There are many radio wave reflections due to buildings and mountains, and it is difficult to construct an SFN environment by multistage relay of broadcast waves. For example, a sneak canceller used at a digital terrestrial broadcasting transmission station also has a strong fluctuation in the received signal level of broadcast waves due to the effects of radio wave reflection, and the number of multipath waves and fluctuations in the D / U ratio. It is difficult to cancel and transmit the broadcast wave signal (retransmission wave) to the subsequent stage.

Here, the concept of digital terrestrial broadcasting segments will be described.
As shown in FIG. 13, within a digital terrestrial broadcast channel (in the example shown, 13 segments of each 6 MHz divided into 14 segments), a one-segment broadcast wave carries broadcast data on one segment (segment number 0). The method wave is launched and broadcasting service is provided. A one-seg broadcast receiver receives a broadcast wave of segment number 0 and receives video, audio, and data.
Even when such a one-segment broadcasting service for digital terrestrial broadcasting is provided, it is difficult to perform multistage relay stably in an SFN environment in an urban area or a mountainous area, as described above.

  In Patent Document 1, in order to solve the problem that a blind area is likely to occur in a service area in a broadcasting system (area broadcasting) that covers a specific area with a minute transmission power using a one-segment broadcasting system, Proposed a broadcasting system that can eliminate or reduce dead zones in area broadcasting by so-called frequency diversity by simultaneously transmitting signals of the same content in other possible transmission frequency band portions of the usable transmission frequency band Has been.

  In Patent Document 2, when a plurality of transmitters wirelessly transmit signals by OFDM modulation using different segments of the same channel, in order to improve reception characteristics at the receiver, In one or more of the transmitters, the transmission unit receives a predetermined signal from the outside, and the transmission timing control unit controls the transmission timing of the OFDM modulation signal at a timing based on the signal received by the reception unit. Has been proposed.

  In Patent Document 3, for example, in area broadcasting of a terrestrial digital broadcasting system, a channel detection unit includes an input broadcast for providing a transmitter capable of determining a segment (frequency) to be output based on an input signal. The channel is detected based on the information specifying the channel included in the signal for the segment, and the segment detecting means detects the segment based on the information specifying the segment included in the input broadcast signal. The detected and modulated signal generating means includes a broadcast signal included in the broadcast signal input at the segment position detected by the segment detecting means among the plurality of segments provided in the channel detected by the channel detecting means. Generated a modulation signal carrying data for and generated by the modulation signal generation means Transmitter has been proposed to output a tone signal.

  In Patent Document 4, for example, in area broadcasting of a terrestrial digital broadcasting system, segment detection means is provided to provide a transmitter capable of determining a segment (frequency) to be output based on radio wave usage status by frequency in the air. However, based on the relationship between the frequency region of the radio wave received by radio and the signal level, the segment corresponding to the free frequency region to be used for transmission is detected, and the transmission signal generating unit is detected by the segment detecting unit. Proposed is a transmitter that generates a transmission signal carrying broadcast data included in a broadcast signal input at a segment position, and outputs the transmission signal generated by the transmission signal generation means Yes.

  In Patent Document 5, in order to be able to receive an area broadcast in a wide range, a first transmitter that transmits a terrestrial digital broadcasting radio wave of a central segment common to a predetermined area, and a terrestrial segment terrestrial area in a predetermined area. Equipped with other transmitters that transmit radio waves that transmit digital broadcasting radio waves, transmission point arrangement of the central segment and peripheral segments adjacent to the central segment, transmission electric field, retransmission electric field, frequency channel spacing, transmission antenna height, transmission Controls at least one of antenna directivity, transmission phase synchronization, frequency segment spacing, and transmission electric field propagation. The transmission electric field of the peripheral segment is changed from the reception electric field of the central segment near the ground in the predetermined area of the digital terrestrial broadcasting radio wave. Broadcast systems having means for separating have been proposed.

  In Patent Document 6, for receiving tracking of broadcast material transmission, the rotating base of the receiving base station is tracked by GPS and then electric field tracking is performed, and the error of the received electric field tracking is 1 degree or more, the pulling range or more, or the received electric field is A reception tracking system that returns to GPS tracking when it is low has been proposed.

As described above, in relay transmission in partial segment broadcasting such as the one-segment broadcasting system, it is difficult to stably and continuously cancel the sneak wave due to the influence of radio wave reflection, etc. Transmission may be hindered.
Specifically, in the one-segment broadcasting system, for example, a relay transmitting station (relay unit) receives a broadcast wave in which broadcast data is placed on the segment of segment number 0 and relays the broadcast wave again. If the received broadcast wave is received by the same relay transmission station due to wraparound, broadcast data having a time difference interferes, and it becomes difficult to normally transmit the broadcast wave.
Detection of vacant segments, particularly detection of a plurality of vacant segments and determination of a plurality of segments to be transmitted, may be unstable due to fading, E-spot, etc. if the circuit design and installation accuracy are insufficient.

JP 2010-118903 A JP 2010-154416 A JP 2010-62811 A JP 2010-62809 A JP 2009-212577 A JP 2005-94625 A

  An object of the present invention is to provide a relay broadcast system capable of normally relaying broadcast waves by preventing the influence of wraparound.

The present invention relates to a repeater that relays broadcast waves carrying broadcast data on a specified (center) segment of a plurality of segments (in order to relay to an island by two-dimensional relay with automatic segment setting). The broadcast wave received by the machine is loaded with the same broadcast data in the specified (center) partial segment and the first partial segment, respectively, and the primary relay receives the first partial segment, The partial segment is transmitted from the second partial segment, the third partial segment, or the fourth partial segment for relay broadcasting, and is transmitted from the ID of the preceding relay broadcast station and the GPS position information of the preceding and own stations. The secondary relay receives the second partial segment, and the repeater receives the second partial segment and the third partial segment or the predetermined segment. The relay station that receives the third partial segment is replaced with the fourth partial segment and the fourth partial segment, and the relay station that has received the third partial segment is the predetermined (central) partial segment and the second partial segment. The relay station that receives the fourth partial segment is replaced with the relay broadcast or the partial segment of the provision (center) and the fourth partial segment, and receives the fourth partial segment. ) And the second partial segment or the specified partial segment and the third partial segment, and relay broadcast.
In addition, the above (in order to receive 1080 / 50i with a slate PC (and future power-saving receiver) using an 8 MHz band terrestrial broadcast channel such as Indonesia, which is different from a 6 MHz band terrestrial broadcast channel such as Japan) In the repeater, the channel band of the broadcast wave is 8 MHz, and the 8 MHz band is divided into 14 segments, 13 segments are utilized at 571 kHz, and broadcasts for transmitting content in 2 (two or two) segments are performed in 5 sets of 2 Two-dimensional relaying is performed by switching to (two or two) segments.

Further, the present invention provides a repeater for relaying broadcast waves in which broadcast data is placed on a partial segment of 1/5 or less of the total number of segments in a plurality of segments of 5 or more in a broadcast transmission channel. The broadcast wave received by the repeater is the first all of the segments other than the partial segment of 1/5 or less of the total number of segments specified by the same broadcast data and the partial segment of 1/5 or less of the total number of segments specified. The relay unit removes broadcast data of partial segments of 1/5 or less of the specified total number of segments from the broadcast wave received, respectively. Broadcast data of a partial segment equal to or less than 1/5 of the first total number of segments of a broadcast wave to be received is converted into a partial segment equal to or less than 1/5 of the specified total number of segments, To a partial segment less than 1/5 of the total number of segments and a second partial segment less than 1/5 of the total number of segments other than the partial segment less than 1/5 of the first total number of segments. Send broadcast waves.
Specifically, in a repeater that relays broadcast waves with broadcast data on 2 segments of 1/5 or less of 13 segments in a broadcast transmission channel (as in FIG. 13, FIG. 14 or FIG. 15) The broadcast wave received by the repeater is loaded with the same broadcast data in the prescribed (center) two segments and the first two segments, respectively, and the primary relay is the first two segments (f1 in FIG. 2). 2 and (2) (f0 in FIG. 2) and (2) in the above (center) and (2) in FIG. 2 (2 in FIG. 2) 3 (2 in f3) or 4 (2) 2 broadcast transmissions are determined from the preceding relay broadcast station ID, the previous stage, and the GPS position information of the own station, and the second relay is the second two segments (f2 in FIG. 2). The repeater that has received the above two segments (center) F0) in FIG. 2 and the third two segments (f3 in FIG. 2) or the two segments (f0 in FIG. 2) of the specified (center) and the fourth two segments are relayed and broadcasted, The repeater that has received the third two segments (f3 in FIG. 2) relays or broadcasts the two segments (f0 in FIG. 2) and the second two segments (f2 in FIG. 2). The relay station that broadcasts the second segment (f0 in FIG. 2) and the fourth two segment by relay broadcasting, and receives the fourth two segments. 2 segments (f0 in FIG. 2) and the second 2 segments (f2 in FIG. 2) or the 2 segments (f0 in FIG. 2) and the third 2 segments (f3 in FIG. 2) It will be relayed and broadcast.

  In addition, broadcast data is loaded on 3, 4, 5 or 6 segments of 1/5 or less of 15 or more segments (such as 32 segments or 42 segments in a 207.5 to 222 MHz or 90 to 108 MHz transmission channel of multimedia broadcasting). In the repeater that relays the broadcast wave, the broadcast wave received by the repeater (as shown in FIG. 16) is the same 3, 4, 5, or 6 segments (f0 in FIG. 2) and the corresponding 3 , 4, 5 or 6 segments, and the first 3, 4, 5 or 6 segments (f1 in FIG. 1), respectively. The broadcast data of (f0 in FIG. 2) is removed, and the broadcast data of the first 3, 4, 5 or 6 segments (f1 in FIG. 2) of the received broadcast wave is changed to the specified 3, 4, 5 or 6 Segment (f0 in FIG. 2) and the above A second 3, 4, 5 or 6 segment (f2 in FIG. 2) other than one 3, 4, 5 or 6 segment (f1 in FIG. 2) and a defined 3, 4, 5 or 6 segment (in FIG. 2) f0) and the first 3, 4, 5 or 6 segments (f1 in FIG. 2) and the third 3, 4, 5 other than the second 3, 4, 5 or 6 segments (f2 in FIG. 2). Alternatively, the broadcast waves that have been replaced are transmitted to 6 segments (f3 in FIG. 2).

  In the broadcast wave relay broadcasting system using any one of the above repeaters (for two-dimensional relay with automatic segment setting that does not require detailed circuit design), the broadcast wave channel has 5N ( N is a natural number) or more segments, and N segment broadcasts are relayed using 5 sets of partial segments. The transmission segment is determined from the ID of the preceding relay broadcast station and the GPS position information of the preceding and own stations. Or, it receives the unpowered submarine optical cable transmission, and broadcasts the specified (center) partial segment and the first partial segment. As shown in FIG. The repeater that has received the first partial segment is switched to the specified (center) partial segment and the second partial segment if the local station is northward from the previous stage. When the relay station that has received the first partial segment is eastward from the previous stage, the relay station broadcasts the first partial segment on the first partial segment by switching to the specified (center) partial segment and the third partial segment. If the relay station that received the partial segment is westward from the previous stage, it relays and broadcasts to the specified (center) partial segment and the fourth partial segment, and in the secondary relay, about 30 degrees around the circumference. The repeater is offset and arranged at an interval of about 60 degrees, and the repeater that has received the second partial segment has the specified (center) partial segment and the third partial segment if the local station is westward from the previous stage. If the relay station that received the second partial segment is eastward from the previous stage, the relay station that has received the second partial segment is switched to the specified (center) partial segment and the fourth partial segment. When the repeater broadcasts and receives the third partial segment, if the local station is in the north direction from the previous stage, it relays and broadcasts to the specified partial segment (center) and the second partial segment. If the relay station that received the segment is southward from the previous stage, it relays and broadcasts the specified partial segment (center) and the fourth partial segment, and the relay station that received the fourth partial segment starts from the previous stage. If the local station is in the south direction, it relays and broadcasts to the specified (center) partial segment and the second partial segment, and the relay station that has received the fourth partial segment is in the north direction from the previous stage. Any broadcast wave relay broadcast system that relays and broadcasts the specified (center) partial segment and the third partial segment, or any of the broadcast wave relay broadcast systems An inverting relay broadcasting system of a broadcast wave and performing relay broadcasting of a broadcast wave expressed by rotation at any angle from 0 to 360 degrees to the direction to the axis.

  Further, the present invention provides the above-described broadcast wave relay broadcasting system, in which tertiary relay (as shown in FIG. 17) is offset by about 15 degrees in the circumference, and the above repeaters are arranged at intervals of about 30 degrees. The repeater which has received the third partial segment relays and broadcasts the partial segment in the above (center) and the first partial segment if the previous stage is northeast and the local station is westward from the previous stage. The repeater receiving the third segment relays and broadcasts the partial segment specified above (in the center) and the second segment if the previous stage is northeast and the local station is eastward from the previous stage, and the fourth partial segment. The received repeater relays and broadcasts the above-mentioned specified (center) partial segment and the above-mentioned third segment when the preceding stage is eastward and the local station is northward from the preceding stage. The first stage is east If the local station is in the south direction from the previous stage, relay broadcasting is performed by switching to the specified partial segment (in the center) and the first partial segment, and the relay station that has received the second partial segment is in the southeast direction. If the station is in the east direction from the previous stage, relay broadcasting is performed by switching to the partial segment in the above (center) and the fourth partial segment, and the repeater receiving the second partial segment is in the southeast direction. If the station is in the west direction from the previous stage, it relays and broadcasts the partial segment in the above (in the middle) and the third partial segment, and the relay station that receives the third partial segment is in the southwest direction. If the local station is in the east direction, the repeater broadcasts the partial segment specified in the above (in the center) and the first partial segment, and the third partial segment is received. If the local station is in the west direction, relay broadcasting is performed between the specified (center) partial segment and the second partial segment, and the relay station that receives the third partial segment is in the northeast direction, and if the local station is westward from the previous stage, the above If the relay station that received the third partial segment was relayed and broadcast on the specified partial segment (in the middle) and the first partial segment, the above provision is applied if the preceding stage is northeast and the local station is eastward from the preceding stage. (The center) and the second partial segment are relayed on the relay broadcast, and the relay station that has received the fourth partial segment is stipulated if the preceding stage is in the east direction and the local station is in the north direction from the preceding stage ( The relay station that received the fourth partial segment was relayed to the eastward direction and the local station was southward from the previous stage. (Center) broadcast wave relay broadcast system that relays and broadcasts the partial segment and the first partial segment, or the reversal around the arbitrary direction of the broadcast wave relay broadcast system and from 0 degrees A broadcast wave relay broadcast system that performs broadcast broadcast of broadcast waves that can be expressed by rotation at an arbitrary angle up to 360 degrees.

Further, in a repeater that relays a broadcast wave in which broadcast data is placed on a prescribed N segment in a segment of 4N (N is a natural number) or more, the broadcast wave received by the repeater is identical to the prescribed N segment. The first relay receives the first N segment and relays it to the specified N segment and the second N segment or the third N segment. Broadcast, and determine the transmission segment from the ID of the preceding relay broadcast station and the GPS position information of the preceding stage and its own station. The secondary relay receives the second N segment, the repeater receives the second N segment and the specified N segment 3 N segments or the specified N segment and the fourth N segment are relayed and broadcast, and the repeater receiving the third N segment receives the specified N segment. Said a cement second N segments instead placed on the N segments of the relay broadcasting or the provision and the fourth N segments relay broadcast, continue to rebroadcast the polygonal line.
Specifically, in a repeater that relays a broadcast wave in which broadcast data is placed on three segments of 1/4 or less of 13 segments in a broadcast transmission channel, the repeater (as in FIG. 18 or FIG. 19) The broadcast waves to be received are loaded on the specified three segments (f0 in FIG. 2) and the first three segments (f1 in FIG. 2) other than the three segments, respectively. The broadcast data of the specified three segments (f0 in FIG. 2) is removed from the received broadcast wave, and the broadcast data of the first three segments (f1 in FIG. 2) of the received broadcast wave is changed to the specified three segments (FIG. 2 f0) and the second three segments (f2 in FIG. 2) other than the first three segments (f1 in FIG. 2) are transmitted.

Also, a repeater that relays broadcast waves carrying broadcast data on 3,4,5, or 6 segments of 1/4 or less of 32 segments or 42 segments in a 207.5 to 222 MHz or 90 to 108 MHz transmission channel of multimedia broadcasting (As shown in FIG. 16), the broadcast waves received by the repeater are the same 3, 4, 5, or 6 segments (f0 in FIG. 2) as the specified broadcast data and other than the 3, 4, 5 or 6 segments. 1, 3, 4, 5, and 6 segments (f 1 in FIG. 2), and the repeater broadcasts the specified 3 or 4 segments (f 0 in FIG. 2) from the received broadcast wave. The data is removed, and the broadcast data of the first 3, 4, 5 or 6 segments (f1 in FIG. 2) of the received broadcast wave is replaced with the specified 3, 4, 5 or 6 segments (f0 in FIG. 2). The first 3, 4, 5 or 6 series A second 3, 4, 5 or 6 segment (f2 in FIG. 2) other than an element (f1 in FIG. 2), a specified 3, 4, 5 or 6 segment (f0 in FIG. 2) and the first 3, A third 3, 4, 5 or 6 segment (f3 in FIG. 2) other than the 4, 5, or 6 segment (f1 in FIG. 2) and the second 3, 4, 5 or 6 segment (f2 in FIG. 2). And transmit each of the retransmitted broadcast waves.
Further, 13 segments of digital terrestrial broadcasting (as shown in FIG. 21 of the schematic diagram of the partial segment numbers transmitted by the non-bent bent-line relay broadcast of the 4-segment broadcast in the terrestrial broadcast channel of one embodiment of the present invention) In a repeater that relays broadcast waves in which broadcast data is loaded on the four specified segments, the broadcast waves received by the repeater are the same as the four segments other than the four specified segments and the specified four segments. 1, and the repeater removes the broadcast data of the specified four segments (f0 in FIG. 21) from the received broadcast wave, and the first of the received broadcast wave. The broadcast data of four segments (f1 in FIG. 21) is divided into four specified segments (f0 in FIG. 21), the four specified segments, and the first four segments. To the second of the four segments (f2 in FIG. 21) transmits each loaded recombinant was broadcast waves.

According to the present invention, it is possible to realize relay transmission of a broadcast wave that effectively uses a frequency (segment) and prevents the influence of wraparound.

Schematic diagram of relay transmission of one embodiment of the present invention 1 is an overall configuration diagram of a relay system according to an embodiment of the present invention. The block diagram of the repeater of one Example of this invention Schematic diagram of broadcast data reassignment processing of one embodiment of the present invention Schematic diagram of broadcast data reassignment processing of one embodiment of the present invention The block diagram of the repeater of one Example of this invention Schematic diagram of broadcast data reassignment processing of one embodiment of the present invention Schematic diagram of broadcast data reassignment processing of one embodiment of the present invention Schematic diagram of broadcast data reassignment processing of one embodiment of the present invention Broadcast data re-transmission processing block diagram of an embodiment of the present invention Schematic diagram of multistage relay for terrestrial digital broadcasting The schematic diagram of the signal degradation of terrestrial digital broadcasting. Schematic diagram of five sets of two-segment two-dimensional relay broadcasting on a terrestrial broadcasting channel according to an embodiment of the present invention. Schematic diagram of five sets of two-segment two-dimensional relay broadcasting on a terrestrial broadcasting channel according to an embodiment of the present invention. Schematic diagram of five sets of two-segment two-dimensional relay broadcasting on a terrestrial broadcasting channel according to an embodiment of the present invention. Schematic diagram of 6-segment two-dimensional relay broadcasting of Japanese multimedia broadcasting of one embodiment of the present invention Schematic diagram of partial segment numbers transmitted for two-dimensional planar relay broadcast on a terrestrial broadcast channel according to an embodiment of the present invention FIG. 3 is a schematic diagram of a segment of a three-segment broadcast broken line relay broadcast on a terrestrial broadcast channel according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a segment of a three-segment broadcast broken line relay broadcast on a terrestrial broadcast channel according to an embodiment of the present invention. Schematic diagram of partial segment numbers transmitted in a three-segment broadcast broken-line relay broadcast on a terrestrial broadcast channel according to an embodiment of the present invention Schematic diagram of partial segment numbers transmitted by a non-bent bent linear relay broadcast of a 4-segment broadcast on a terrestrial broadcast channel according to an embodiment of the present invention

The feature of the present invention is that the primary relay stations transmit at different frequency segments as shown in FIG. 2 of the whole block diagram of the relay broadcast system of the two-dimensional planar relay broadcast of one embodiment of the present invention. Further, as shown in FIG. 1 of the block diagram of the relay broadcaster of the two-dimensional planar relay broadcast of one embodiment of the present invention, the transmission segment is determined from the relay ID and GPS position information.
In FIG. 1, 1 is a transmitter and 2 and 3 are repeaters.
In the transmitter 1, R1 is a satellite broadcast receiving antenna, G1 is a GPS receiving antenna, and T1 is a relay broadcast transmitting antenna. Further, 14 is a satellite broadcast receiving unit, 15 is a GPS receiving unit, 16 is an optical receiving unit such as a non-powered submarine optical cable, 17 and 18 are demodulation units (DEM), 19 is a multiplexing unit (MUX), and 20 is a modulation unit ( MOD), 21 is a transmitter.
In the repeater 2, R2 is a relay broadcast receiving antenna, G2 is a GPS receiving antenna, and T2 is a relay broadcast transmitting antenna. Also, 6 is a relay broadcast receiving unit, 7 is a demodulating unit (DEM), 8 is a modulating unit (MOD) (transposing segments), 9 is a transmitting unit, 11 is a GPS receiving unit, and 12 is a CPU that is a determining unit, Reference numeral 13 denotes a multiplexing unit (MUX).
In the repeater 3, R3 is a relay broadcast receiving antenna, G3 is a GPS receiving antenna, and T3 is a relay broadcast transmitting antenna.
In FIG. 2, 1 is a transmitter, and 2-1, 2-2, 2-3 are primary repeaters (A-1, A-2, A-3). Reference numerals 3-1, 3-2, and 3-3 are tertiary repeaters (B-1, B-2, B-3). 4-1 and 4-2 are tertiary relays (C-1 and C-2). Reference numeral 5 denotes a receiver.

In addition, the present invention is characterized in that, for two-dimensional relay with automatic segment setting that does not require detailed circuit design, in a broadcast wave relay broadcasting system, there are 5N or more segments in the broadcast wave channel, and N segment broadcasting is performed. Relay broadcasting is performed by switching to five sets of partial segments, and a transmission partial segment is determined from the ID of the preceding relay broadcast station and the GPS position information of the preceding and own stations. Then, a satellite broadcast or a non-powered submarine optical cable transmission is received, and the specified (center) partial segment and the first partial segment are relay broadcast, and the schematic diagram of the two-dimensional planar relay broadcast of one embodiment of the present invention As shown in FIG. 17, in the primary relay, the above repeaters are arranged at intervals of about 120 degrees on the circumference.
That is, in FIG. 2 of the entire block diagram of the relay broadcasting system of the two-dimensional planar relay broadcasting of one embodiment of the present invention, the primary relays 2-1, 2-2, 2-3 are located around the main island. It is preferable to arrange them at intervals of about 120 degrees.
In addition, if the relay station that has received the first partial segment is northward from the previous stage, the repeater broadcasts the first partial segment by switching to the specified (center) partial segment and the second partial segment. If the relay station that receives the segment is eastward from the previous stage, the relay station broadcasts it by switching to the specified (center) partial segment and the third partial segment, and the relay station that has received the first partial segment If the local station is in the west direction, the broadcast is performed by switching to the specified (center) partial segment and the fourth partial segment.
Further, in the secondary relay, the relay is arranged at an interval of about 60 degrees with an offset of about 30 degrees in the circumference, and the relay station that has received the second partial segment has the above-mentioned provision ( (The center of the above) and the third partial segment are relayed and broadcast, and the relay station that has received the second partial segment receives the second segment in the east direction from the previous stage. And the fourth partial segment are broadcasted, and the relay station that has received the third partial segment replaces the specified partial segment (center) and the second partial segment if the local station is northward from the previous stage. When the relay station that has received the third partial segment has received the third partial segment from the previous stage, if the local station is in the south direction, the relay station broadcasts it by switching to the specified partial segment (center) and the fourth partial segment. If the relay station that receives the segment is relayed southward from the previous stage, the relay station broadcasts the specified partial segment (in the center) and the second partial segment. If the local station is in the north direction from the previous stage, it relays and broadcasts to the specified (center) partial segment and the third partial segment.
Further, the reversal about the arbitrary direction as described above and the rotation at an arbitrary angle from 0 degrees to 360 degrees may be used.

In the present invention, as shown in FIG. 17, in the third-order relay, the repeater is offset by about 15 degrees in the circumference and arranged at intervals of about 30 degrees, and the repeater receiving the third partial segment is the preceding stage. If the station is in the northeast direction and the station is in the west direction from the previous stage, it relays and broadcasts the partial segment specified above (in the middle) and the first partial segment, and the relay station that receives the third partial segment In the northeast direction, if your station is eastward from the previous stage, it will be relayed to the above specified (center) segment and the second partial segment for relay broadcast. If the local station is in the north direction from the previous stage, it relays and broadcasts the specified partial segment (in the middle) and the third partial segment, and the relay station that has received the fourth partial segment is in the east direction. The station is more south If the direction is the direction, the relay segment broadcasts the partial segment specified above (in the middle) and the first partial segment, and the second partial segment is received in the southeast direction of the repeater, and the local station is eastward from the previous stage. Then the relay segment broadcasts the partial segment specified in the above (in the middle) and the fourth partial segment, and the relay station that received the second partial segment is in the southeast direction and the station is in the west direction from the previous stage. If the relay station that received the third partial segment was relayed and broadcast on the partial segment (in the center) and the third partial segment, the previous stage was southwest and the local station was eastward from the previous stage. The relay station that received the third partial segment was relayed and broadcast on the specified (center) partial segment and the first partial segment. If the relay segment that received the third partial segment was relayed and broadcast on the partial segment (in the middle) and the second partial segment, the above provision (if the previous stage was northeast and the local station was westward from the previous stage) The relay station that received the third partial segment was relayed and broadcast on the partial segment at the center) and the first partial segment. The relay station that received the fourth partial segment was relayed by broadcasting to the second partial segment in the middle, and the above (if the center ) And the third partial segment are relayed and broadcasted, and the relay station that has received the fourth partial segment receives the above provision (if the preceding stage is in the east direction and the local station is in the south direction from the preceding stage). Continue to rebroadcast instead placed on the partial segment and the first sub-segment of the central).
Here, inversion with the above-mentioned arbitrary direction as an axis and rotation at an arbitrary angle from 0 degrees to 360 degrees may be used.

As a result, a schematic diagram of five sets of two-segment two-dimensional relay broadcasting on the terrestrial broadcast channel of the embodiment of the present invention shown in FIGS. 13 to 15 and the Japanese multimedia of the embodiment of the present invention shown in FIG. As shown in the schematic diagram of two-dimensional relay broadcasting of six segments of broadcast, broadcast data is placed in a partial segment of 1/5 or less of the total number of segments in all of the five or more segments in the broadcast transmission channel. In a repeater that relays a broadcast wave, the broadcast wave received by the repeater is a partial segment equal to or less than 1/5 of the total number of segments defined by the same broadcast data and 1/5 or less of the total number of segments defined. And 1/5 or less of the first total number of segments other than the partial segment, and the repeater is 1/5 or less of the total number of segments defined from the broadcast wave received. The broadcast data of the partial segment is removed, and the broadcast data of the partial segment of 1/5 or less of the first total number of segments of the received broadcast wave is changed to a partial segment of 1/5 or less of the specified total number of segments. A partial segment less than or equal to 1/5 of the total number of segments and a second partial segment less than or equal to 1/5 of the total number of segments other than the partial segment less than or equal to 1/5 of the first total number of segments. Each broadcast wave is transmitted.
Specifically, in a repeater that relays broadcast waves with broadcast data on 2 segments of 1/5 or less of 13 segments in a broadcast transmission channel (as in FIG. 13, FIG. 14 or FIG. 15) The broadcast wave received by the repeater is loaded with the same broadcast data in the prescribed (center) two segments and the first two segments, respectively, and the primary relay is the first two segments (f1 in FIG. 2). 2 and (2) (f0 in FIG. 2) and (2) in the above (center) and (2) in FIG. 2 (2 in FIG. 2) 3 (2 in f3) or 4 (2) 2 broadcast transmissions are determined from the preceding relay broadcast station ID, the previous stage, and the GPS position information of the own station, and the second relay is the second two segments (f2 in FIG. 2). The repeater that has received the above two segments (center) F0) in FIG. 2 and the third two segments (f3 in FIG. 2) or the two segments (f0 in FIG. 2) of the specified (center) and the fourth two segments are relayed and broadcasted, The repeater that has received the third two segments (f3 in FIG. 2) replaces the two segments (f0 in FIG. 2) and the second two segments (f2 in FIG. 2) of the above (center). Relay broadcast or relay broadcast by replacing the two segments (f0 in FIG. 2) and the fourth two segments of the rule (in the center) and receiving the fourth two segments. 2) (f0 in FIG. 2) and the second 2 segments (f2 in FIG. 2) or the 2 segments (f0 in FIG. 2) and the third 2 segments (figure 2). 2) f3) and relay broadcast.

  In addition, broadcast data is loaded on 3, 4, 5 or 6 segments of 1/5 or less of 3N or more segments (such as 32 segments or 42 segments in a 207.5 to 222 MHz or 90 to 108 MHz transmission channel of multimedia broadcasting). In the repeater that relays the broadcast wave, the broadcast wave received by the repeater (as shown in FIG. 16) is the same 3, 3, 5, or 6 segments (f0 in FIG. 2) and the corresponding 3 , 4, 5 or 6 segments, and the first 3, 4, 5 or 6 segments (f1 in FIG. 2), respectively, and the repeater transmits the specified 3 or 4 segments from the received broadcast wave. The broadcast data of (f0 in FIG. 2) is removed, and the broadcast data of the first 3, 4, 5 or 6 segments (f1 in FIG. 2) of the received broadcast wave is changed to the specified 3, 4, 5 or 6 Segment (f0 in Figure 2) and previous The second 3, 4, 5 or 6 segment (f2 in FIG. 2) other than the first 3, 4, 5 or 6 segment (f2 in FIG. 2), the specified 3, 4, 5 or 6 segment (f0 in FIG. 2) and the first 1, 3, 4, 5 or 6 segments and 3, 3, 4, 5 or 6 segments other than the second 3, 4, 5 or 6 segments (f 3 in FIG. 2) Send a wave.

13 to 15 are schematic diagrams of two sets of two-dimensional two-dimensional relay broadcasting on the terrestrial broadcasting channel of the embodiment of the present invention. In Japan and the former NTSC (National Television System Committee) area, 6 MHz is divided into 14 parts. It is 13 segments at 428kHz, and most of the EU and the former PAL (Phase Alternation by Line) region and most of the former SECAM (Sequential Couleur a Memoire) region, etc., 7MHz is divided into 14 and divided into 13 segments at 500kHz. In some parts of the PAL area and part of the former SECAM area, 8MHz is divided into 14 segments, and 571kHz has 13 segments. That is, the segment band is proportional to the channel band, and the number of segments is 13.
In multimedia broadcasting such as 207.5 to 222 MHz and 90 to 108 MHz, for example, as shown in the schematic diagram of 6-segment two-dimensional relay broadcasting of Japanese multimedia broadcasting in one embodiment of the present invention in FIG. 14.5MHz is divided into about 428kHz by about 33, and 3 out of 32 segments (the center) are used.

Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.
1 and 2 show a broadcast wave relay transmission system according to an embodiment of the present invention.
FIG. 1 shows a basic configuration of a relay transmission system that performs multistage relay. In the relay transmission system, a broadcast wave transmitted from a transmitter 1 is transmitted to a relay (A) 2 and a relay (B). 3 and so on are sequentially relayed and transmitted.

  In the transmitter 1 of FIG. 1, the satellite broadcast receiving antenna R 1 receives the satellite broadcast, amplifies it by the satellite broadcast receiver 14, converts the frequency, demodulates the satellite broadcast content by the demodulator (DEM) 17, and sends it to the multiplexer (MUX) 19. send. The optical receiver 6 receives a broadcast signal from a non-powered submarine optical cable, converts the frequency, and a demodulator (DEM) 18 demodulates the broadcast content of the optical cable. The GPS is received by the GPS receiving antenna G 1, the position information of the transmitter 1 is calculated by the GPS receiving unit 15, and sent to the multiplexing unit (MUX) 19. A multiplexing unit (MUX) 19 selects either satellite broadcast content or optical cable broadcast content, multiplexes the transmitter ID as the location information of the transmitter 1 and the relay ID, and selects the selected broadcast content and transmitter 1. The relay broadcast content in which the transmitter ID is multiplexed as the relay ID and the relay ID is sent to the modulation unit (MOD) 20. The modulation unit (MOD) 20 conforms to the partial segment broadcasting system in each region, and relays broadcast content in which the transmitter ID is multiplexed as the location information of the transmitter 1 and the relay ID as well as the specified segment f0 in the transmission channel and the like. To the first segment f1. The transmission unit 21 amplifies the transmission channel including the modulated segment (f0, f1) and transmits it as a broadcast wave (f0, f1) from the relay broadcast transmission antenna T1.

  In the repeater 2 of FIG. 1, broadcast waves (f0, f1) are received by the relay broadcast receiving antenna R2, amplified by the relay broadcast receiver 6, frequency-converted, and demodulator (DEM) 7 The relay broadcast content in which the transmitter ID is multiplexed as the relay ID is demodulated, and the transmitter 1 position information and the relay ID that have been superimposed on the relay broadcast content are separated from the transmitter ID and transmitted to the CPU 12 as the determination unit. The transmitter ID is sent as the position information and relay ID of the machine 1, and the relay broadcast content obtained by separating the transmitter ID as the position information and relay ID of the transmitter 1 is sent to the multiplexer (MUX) 13. The GPS receiving antenna G2 receives the GPS, the GPS receiving unit 11 calculates the position information of the repeater 2, and sends the position information of the repeater 2 to the multiplexing unit (MUX) 13 and the determination unit CPU12. The multiplexing unit (MUX) 13 multiplexes the relay broadcast content obtained by separating the transmitter ID as the relay ID and the relay ID as the relay ID, and relays the relay (A) ID as the relay ID. The relay broadcast content obtained by multiplexing the position information of the machine 2 and the ID of the relay machine (A) as the relay ID is sent to the modulation unit (MOD) 8 (transposing the segment). The CPU 12, which is a determination unit, determines a segment to be transmitted from the position information of the transmitter 1 and the position information of the repeater 2 as a second segment f2 different from the specified segment f0 and the first segment f1, and replaces the segment. (MOD) 8 sends segment information to be transmitted. Modulation unit (MOD) 8 for transposing a segment In accordance with the partial segment broadcasting system of each region, relay broadcast content in which the relay unit (A) ID is multiplexed as the location information of the relay unit 2 and the relay ID is transmitted in the transmission channel. Modulate into a regular segment f0 and a second segment f2. The transmission unit 9 amplifies the transmission channel including the modulated segment (f0, f2) and transmits it from the relay broadcast transmission antenna T2.

In addition, this relay transmission system transmits a one-segment digital terrestrial broadcast wave that transmits a broadcast wave carrying broadcast data in a specific segment (specified segment: f0) in the transmission channel. The other segments f1, f2, f3, and f4 are also used for transmission.
For this purpose, the transmitter 1 has a function of copying and loading broadcast data placed on the prescribed segment f0 in the plurality of segments onto the first segment f1 other than the prescribed segment f0, and the prescribed segment f0 and the first segment f1. Have the function of transmitting broadcast waves (f0, f1) carrying the same broadcast data to the repeater (A) 2.
The repeater (A) 2 that relays broadcast waves (f0, f1) from the transmitter 1 is defined by the reception function 6 that receives broadcast waves (f0, f1) and the received broadcast waves (f0, f1). The function 7 for removing the broadcast data of the segment f0, the broadcast data of the first segment f1 of the received broadcast wave (f0, f1) are respectively sent to the specified segment f0 and the second segment f2 other than the specified segment and the first segment. A re-sending function 8 for re-sending, and a transmission function 9 for transmitting broadcast waves (f 0, f 2) carrying the same broadcast data to the specified segment f 0 and the second segment f 2 to the repeater (B) 3. Yes.
Therefore, the repeater (A) 2 removes the broadcast data of the specified segment f0 from the received broadcast wave (f0, f1), and replaces the broadcast data of the first segment f1 with the specified segment f0 and the second segment f2, respectively. Transmit broadcast waves (f 0, f 2) are transmitted to the repeater (B) 3.
As a result, even if the transmission broadcast waves (f0, f2) wrap around, the broadcast data of the first segment f1 is relayed and transmitted instead of the specified segment f0 of the received broadcast waves (f0, f1). A) 2 can normally relay and transmit broadcast data.

The subsequent relay (B) 3 also has the same function as the relay (A) 2, and removes the broadcast data of the specified segment f0 from the received broadcast wave (f0, f2) and receives the received broadcast. Broadcast waves (f0, f3) in which the broadcast data of the second segment f2 of the wave (f0, f2) are replaced with the specified segment f0 and the third segment f3 or the third segment f4 other than the specified segment and the second segment, respectively. ) Or (f0, f4) is transmitted to the subsequent stage.
For example, when the broadcast wave is an OFDM signal with a guard interval, it is possible to selectively receive a strong signal, so that the arbitraryness of this segment (frequency) becomes high.

With the relay transmission system as described above, for example, area broadcasting by multistage relay as shown in FIG. 2 can be realized.
That is, the repeaters 2-1 and 2-2 that have received the broadcast waves (f0, f1) transmitted from the transmitter (transmitting station) 1 relay the broadcast waves (f0, f2), and further broadcast waves (f0, f2). The relay devices 3-1 and 3-2 that have received f0, f2) relay the broadcast wave (f0, f3), and the relay device in the subsequent stage relays the broadcast wave while shifting the segment on which the broadcast data is placed, In addition, a broadcast wave transmitted by a receiver 5 such as a television receiver is received and an image based on broadcast data is output.

Next, multistage relay of broadcast data (contents) will be described in more detail with reference to FIGS.
For example, when a one-segment service is desired, the content is transmitted with the specified segment f0 of the segment number of the arbitrary channel. At that time, the same signal (contents) as the segment number f0 is copied and fired to the segment f11 of the segment number 11 other than the segment f0 for multistage relay.
In this description, the area that covers the one-seg service from the first radio wave emission point is called a parent cell, and the areas that receive the radio waves of the parent cell and perform multistage relay are called child cells. There are as many cells as there are multistage relays.

FIG. 3 shows the configuration of the transmitter 10 forming the parent cell and the transmitter 20 forming the child cell.
The parent cell transmitter 10 corresponds to the transmitter 1 shown in FIG. 1, and the child cell transmitter 20 corresponds to the repeater 2 shown in FIG.
In addition, if necessary, child cells that perform multi-stage relay are distinguished from each other with numbers such as child cell 1, child cell 2,... The child cell N is described.
The parent cell transmitter 10 includes a terrestrial digital broadcast modulation unit 11, a terrestrial digital broadcast modulation unit 12, and an output synthesis unit 13.
Content to be serviced is input to the parent cell transmitter 10, and this content is input to the terrestrial digital broadcast modulation unit 11 and the terrestrial digital broadcast modulation unit 12.
The terrestrial digital broadcast modulation unit 11 sends this output signal to the output signal synthesis unit 13 as a segment number 0 signal, and the terrestrial digital broadcast modulation unit 12 outputs a segment number X output signal as a signal other than the segment number 0. The data is sent to the synthesis unit 13.
The output signal synthesis unit 13 outputs a broadcast wave including the segment number 0 output signal and the segment number X output signal as a parent cell transmission signal.
The above process is the parent cell process of FIG.

The child cell N transmitter 20 includes a reception filter unit 21 and a segment copy unit 22.
The child cell N transmitter 20 receives the received signal as a child cell N reception signal whose reception characteristics are changed by a propagation path from a higher-order transmitter. For example, the child cell 1 transmitter receives a parent cell transmission signal emitted by a parent cell transmitter 10 which is a higher-order transmitter than itself as a child cell 1 reception signal. This number N represents the number of child cell transmitters in the number of stages, and may be any number.
The processing of the child cell N received signal is shown in FIGS. 4 and 5, respectively.

The child cell N receiver 20 inputs the child cell N reception signal to the reception filter unit 21, and outputs the reception signal from the reception filter unit 21 to the segment copy unit 22. The process of the reception filter unit 21 is the child cell 1 process 2 of FIG.
The segment copy unit 22 copies the content of the received signal and outputs it as a child cell N transmission signal. The processing of the segment copy unit 22 is child cell 1 processing 3 in FIG.

The child cell 1 transmission signal emitted by the child cell 1 is input as a child cell reception signal that is a reception signal of the child cell 1 itself by wraparound. The state of interference between the received wave and the transmitted wave at this time is the child cell 1 process 4 in FIG.
However, the reception filter unit 21 in the subsequent stage can clearly extract a one-segment signal by the processing of the child cell 1 processing 5 in FIG. 4, and oscillation due to wraparound does not occur.

In this way, the child cell 1 transmission signal emitted by the child cell 1 transmitter is received by the child cell 2 transmitter as the child cell 2 reception signal and output as the child cell 2 output signal.
The number N may be increased as much as possible, and 1, 2, 3,... N and child cells are increased in this way, and one-segment radio waves are transmitted to the subsequent stage.

The above processing will be described in more detail with reference to FIGS.
For example, the child cell 1 receives radio waves emitted from the parent cell. This is shown in child cell 1 process 1 of FIG.
Subsequently, signals received other than the segment number 11 are removed. This is shown in child cell 1 process 2 of FIG.

Subsequently, in order to shift the signal received at the segment number 11 other than the segment number 0 to the segment number 0 and to enable multistage relay in the cell subsequent to the child cell 1, for example, the segment number other than the segment number 0 12 is also copied and transmitted. This is shown in child cell 1 process 3 in FIG.
The radio waves emitted by child cell 1 are segment numbers 0 and 12, and the radio waves received from the parent cell are segment numbers 0 and 11, so the radio wave of segment number 0 emitted by child cell 1 is It is mixed in the receiving part of cell 1. This is shown in child cell 1 process 4 of FIG.
However, since the child cell 1 removes the signal of the segment number 0, there is no influence due to the wraparound. This is shown in child cell 1 process 5 of FIG.

Since the signal of segment number 0 launched in the parent cell and the signal of segment number 0 launched in child cell 1 are the same signal, an SFN environment can be constructed between the parent cell and child cell 1, and the area of parent cell and child cell 1 Even if they overlap, reception is not affected.
That is, the receiver of the one-segment service can continuously receive the segment number 0 from the parent cell to the child cell 1. This is shown in FIG.

Subsequently, the child cell 2 receives the signals of the segment numbers 0 and 12 from the child cell 1. This is shown in child cell 2 process 1 of FIG.
Subsequently, signals other than segment number 12 are removed. This is shown in child cell 2 process 2 of FIG.
Then, the signal of segment number 12 is shifted to segment number 0 and also shifted to segment number 7, and broadcast waves (radio waves) carrying contents on segment numbers 0 and 7 are emitted. This is shown in child cell 2 process 3 of FIG.

Similarly to the child cell 1, in the child cell 2, in the segment number 0, the radio wave received from the child cell 1 and the radio wave emitted from the child cell 2 are mixed into the receiving unit of the child cell 2 due to the wraparound. This is shown in child cell 2 process 4 of FIG.
However, since the child cell 2 removes signals other than the segment number 12, there is no influence due to the wraparound. This is shown in child cell 2 process 5 of FIG.

Since the signal of segment number 0 fired in child cell 1 and the signal of segment number 0 fired in child cell 2 are the same signal, an SFN environment can be constructed between child cell 1 and child cell 2, and child cell 1 and child cell Even if the two areas overlap, reception is not affected. FIG. 5 shows the flow of the processing.
Therefore, segment number 0 can be continuously received from child cell 1 to child cell 2. If going back, segment number 0 can be continuously received from the parent cell to child cell 1 and child cell 2. In this way, if transmission is performed while changing the segment to be transmitted with the adjacent cell in the child cell, the number N of cells can be arbitrarily increased. If the number N of cells can be arbitrarily increased, the receiver of the one-segment service can continuously receive the one-segment from the parent cell to the child cell N.

Next, an embodiment will be described in which the control signal of each cell transmitter is transmitted in addition to the content to be serviced.
FIG. 6 shows a configuration of the transmitter 10 forming the parent cell and the transmitter 20 forming the child cell.
The parent cell transmitter 10 includes a control signal transmission unit 14 in addition to the terrestrial digital broadcast modulation unit 11, the terrestrial digital broadcast modulation unit 12, and the output synthesis unit 13.
Content to be serviced is input to the parent cell transmitter 10, and this content is input to the terrestrial digital broadcast modulation unit 11 and the terrestrial digital broadcast modulation unit 12.

The terrestrial digital broadcast modulation unit 11 sends a segment number 0 output signal to the output signal synthesis unit 13 as a segment number 0 signal, and the terrestrial digital broadcast modulation unit 12 sends a segment number X output signal as a signal other than the segment number 0. The signal is sent to the output signal synthesis unit 13.
The control signal transmission unit 14 outputs a control signal output signal to the output signal synthesis unit 13 as a control signal for each cell transmitter.
The output signal synthesizer 13 receives the segment number 0 output signal, the segment number X output signal, and the control signal output signal, and outputs a parent cell transmission signal. The parent cell transmission signal is the parent cell processing of FIG.

The child cell N transmitter 20 includes a control signal changing unit 23 and an output signal combining unit 24 in addition to the reception filter unit 21 and the segment copy unit 22.
The child cell N transmitter 20 receives the received signal as a child cell N reception signal whose reception characteristics are changed by a propagation path from a higher-order transmitter. For example, the child cell 1 transmitter receives a parent cell transmission signal emitted by a parent cell transmitter 10 which is a higher-order transmitter than itself as a child cell 1 reception signal. The child cell N reception signal is the child cell 1 process 1 of FIG.

The child cell N receiver 20 inputs the child cell N reception signal to the reception filter unit 21 and outputs the reception signal to the segment copy unit 22. The process of the reception filter unit 21 is the child cell 1 process 2 of FIG.
The segment copy unit 22 copies the segment and outputs it as a child cell N transmission signal to the output combining unit 24.

The control signal changing unit 23 may or may not rewrite the contents of the control signal. The control signal changing unit 23 shifts the frequency to a segment different from the received segment and outputs it to the output combining unit 24 as a control signal output signal.
The output combining unit 24 combines the copy signal and the control signal output signal and outputs the combined signal as a child cell N transmission signal. The processing of the output combining unit 24 is child cell 1 processing 3 in FIG.

The child cell 1 transmission signal emitted by the child cell 1 is input to the child cell 1 as a child cell reception signal that is a reception signal of the child cell 1 by wraparound. The state of interference between the received wave and the transmitted wave at this time is the child cell 1 process 4 in FIG.
However, the reception filter unit 21 in the subsequent stage can take out a one-segment signal neatly by the same process as the child cell 1 process 5 in FIG. 4, and oscillation due to wraparound does not occur.
In this way, the child cell 1 transmission signal emitted by the child cell 1 transmitter is received by the child cell 2 transmitter as the child cell 2 reception signal and output as the child cell 2 output signal.

The above processing will be described in more detail with reference to FIG.
For example, when a one-segment service is desired, content is transmitted with segment number 0 of an arbitrary channel. At that time, the same signal (content) as that of segment number 0 is copied and fired for example in segment number 12 other than segment number 0 for multistage relay. In addition to this, in order to efficiently construct a cell, a control signal, which is a signal for transmitting the firmware of the transmitter, is controlled by another segment number (segment number). 11). This is shown in the parent cell process of FIG.

The child cell 1 receives radio waves emitted from the parent cell. This is shown in child cell 1 process 1 of FIG.
Subsequently, the received signals other than the segment number 12 of the content to be transmitted to the subsequent stage and the segment 11 of the control signal are removed. This is shown in child cell 1 process 2 of FIG.
Subsequently, in order to shift the signal received at the segment number 12 other than the segment number 0 to the segment number 0 and to enable multi-stage relay to the cell subsequent to the child cell 1, for example, to the segment number 7 other than the segment number 0 Also copy and transmit. Further, a signal to be transmitted for control is transmitted by shifting one segment. This is shown in child cell 1 process 3 of FIG.

The radio waves emitted by the child cell 1 are segment numbers 0, 1, and 7, and the radio waves received from the parent cell are segment numbers 0, 11, and 12. Therefore, the radio wave of the segment number 0 emitted by the child cell 1 is It mixes in the receiving part of the child cell 1 by wraparound. This is shown in child cell 1 process 4 of FIG.
However, since the child cell 1 removes the signal of the segment number 0, the influence due to the wraparound does not occur. This is shown in child cell 1 process 5 of FIG.
Since the signal of segment number 0 launched in the parent cell and the signal of segment number 0 launched in child cell 1 are the same signal, an SFN environment can be constructed between the parent cell and child cell 1, and the area of parent cell and child cell 1 Even if they overlap, reception is not affected. That is, the receiver of the one-segment service can continuously receive the segment number 0 from the parent cell to the child cell 1.

Here, another configuration example for performing one-seg removal and duplication processing will be described with reference to FIGS.
If one-segment removal and duplication processing is performed after conversion to the frequency domain, FFT processing is required, and it is considered that a delay exceeding the guard interval occurs, making SFN difficult to implement. A configuration example in which the removal and duplication processing is performed with a signal on the time axis is shown, and FIG. 9 shows the contents of the processing.

In this example, the received signal (a in FIG. 9) in which content is placed on the prescribed segment and the first segment is digitally converted by the analog / digital converter 30 and the content placed in the prescribed segment of the received signal is filtered. It removes by 31 (b of FIG. 9).
Subsequently, the signal output from the filter 31 is branched, and one signal is given a frequency shift rot1 for moving the first segment to the specified segment by the multiplier 32 (c in FIG. 9), and the other signal is The multiplier 33 gives a frequency shift rot2 for moving the first segment to the second segment (d in FIG. 9).

These frequency-shifted (modulated) signals are combined by an adder 34 (e in FIG. 9), and the combined signal is converted into an analog signal by a digital / analog converter 35 to obtain a transmission signal.
When only analog signal processing is used, the configuration shown in FIG.

  Here, the present invention is not limited to a multistage relay system in which a plurality of repeaters are arranged linearly or planarly, but also has a system configuration based on a three-dimensional arrangement including the placement of repeaters in the height direction. You can also. For example, in an area broadcast with a broadcast range of about 300 m in radius, radio wave propagation is hindered if there are buildings or obstacles of 300 m or longer, so it is preferable that the relay system has a three-dimensional arrangement.

The present invention can also be applied to the relay of partial segment broadcasts having a segment number equal to or less than 1/3 of the total number of segments in the broadcast transmission channel. Therefore, in 13 segments out of 14 divisions of each 6 MHz of terrestrial digital broadcasting, not only one-segment broadcasting but also so-called digital radio broadcasting (terrestrial digital audio broadcasting) of 3 segments (3 segments), educational television broadcasting of 4 segments, etc. It can also be applied to relay of partial segment broadcasting.
13 to 15, in the schematic diagram of two sets of two-segment two-dimensional relay broadcasting on the terrestrial broadcasting channel of one embodiment of the present invention, in Japan and the former NTSC region, 6 MHz is divided into 14 and 428 kHz with 13 segments. Yes, most of the EU and the former PAL region and the majority of the former SECAM region are divided into 14 segments by dividing 7 MHz into 14 segments at 500 kHz, and 14 MHz is used in some parts of Indonesia and the former PAL region and some of the former SECAM region. Divide and be 13 segments at 571kHz. That is, the segment band is proportional to the channel band, and the number of segments is 13.
Furthermore, in broader and multi-segment broadcasting such as multimedia broadcasting, there are more segments such as 32 segments in 33 divisions of 14.5 MHz from 207.5 to 222 MHz and 41 segments in 42 divisions of 18 MHz from 90 to 108 MHz. It can also be applied to a number of partial segment broadcasts. For example, as shown in the schematic diagram of the six-segment two-dimensional relay broadcast of the Japanese multimedia broadcast in one embodiment of the present invention in FIG. Or 5 groups of 6 segments. 5 sets of 5 segments (not shown), 5 sets of 4 segments, or 5 sets of 3 segments may be used.
Multimedia broadcasting is not limited to ISDB-T, but may be T-DMB (Terrestrial-Digital Multimedia Broadcasting), DVB-H (Digital Video Broadcasting-Handheld), or MediaFLO.

Specifically, in a repeater that relays broadcast waves in which broadcast data is carried on 3 segments of 1/4 or less of 13 segments in a broadcast transmission channel, the repeater receives as shown in FIG. 18 or FIG. The broadcast wave contains the same broadcast data in the specified three segments and the first three segments other than the three segments, and the relay removes the specified three-segment broadcast data from the received broadcast waves. Then, the broadcast data of the first three segments of the received broadcast wave are transmitted to the specified three segments and the second three segments other than the first three segments, respectively. FIG. 20 is a schematic diagram of partial segment numbers transmitted in a three-segment broadcast broken-line relay broadcast on a terrestrial broadcast channel according to an embodiment of the present invention.
In addition, as shown in FIG. 16, a broadcast in which broadcast data is placed on 3, 4, 5, or 6 segments of 1/4 or less of 32 segments or 42 segments in a 207.5 to 222 MHz or 90 to 108 MHz transmission channel of multimedia broadcasting. In a repeater that relays waves, the broadcast waves received by the repeater are the same 3, 4, 5, or 6 segments (f0 in FIG. 2) as the same broadcast data, and the other than the 3, 4, 5, or 6 segments. 1, 3, 4, 5, or 6 segments (f 1 in FIG. 2), and the repeater transmits broadcast data of specified 3 or 4 segments (f 0 in FIG. 2) from the received broadcast wave. The broadcast data of the first 3, 4, 5 or 6 segments (f1 in FIG. 2) of the received broadcast wave is removed, and the specified 3, 4, 5 or 6 segments (f0 in FIG. 2) and the first 1, 3, 4, 5 or 6 segments A second 3, 4, 5 or 6 segment (f2 in FIG. 2), a specified 3, 4, 5 or 6 segment (f0 in FIG. 2) and the first 3, 4, 5 or 6 segment (B1 in FIG. 2) and the third 3, 4, 5 or 6 segments (f3 in FIG. 2) other than the second 3, 4, 5 or 6 segments are transmitted respectively. .

Furthermore, in a repeater that relays broadcast waves in which broadcast data is placed on a specified segment in a segment of 4N (N is a natural number) or more, the broadcast wave received by the repeater is the same as the N broadcast data of the same broadcast data. ) And N first segments, and the primary relay receives the N first segments, the N specified (center) segments, and the N second segments or The relay segment is broadcast on the third segment, and the transmission segment is determined from the ID of the preceding relay broadcast station and the GPS position information of the preceding and own stations. The secondary relay uses the N second segments. The received repeater relays and broadcasts to the N specified (center) segments and the N third segments or the N specified (center) segments and the N fourth segments. The relay station that has received the N third segments replaces the N prescribed (center) segments and the N second segments to perform relay broadcasting or the N prescribed (center) segments. The broadcast is carried out on the N fourth segments and relayed in a polygonal line.
Specifically, as shown in FIG. 20 of the schematic diagram of the partial segment numbers to be transmitted in the three-segment broadcast broken-line relay broadcast in the terrestrial broadcast channel of one embodiment of the present invention, among the 13 segments in the broadcast transmission channel. As shown in FIG. 18 or FIG. 19, in a repeater that relays broadcast waves in which broadcast data is placed in three segments of 1/4 or less, the broadcast waves received by the repeater are defined in three segments (see FIG. 20 f0) and the first three segments (f1 in FIG. 20) other than the three segments, respectively, and the repeater transmits the specified three segments (f0 in FIG. 20) from the received broadcast wave. The broadcast data is removed, and the broadcast data of the first three segments (f1 in FIG. 20) of the received broadcast wave is replaced with the specified three segments (f0 in FIG. 20) and the second other than the first three segments. 3 segments DOO transmits the broadcast waves instead each placed in the the (f2 in FIG. 20).

  Also, a repeater that relays broadcast waves carrying broadcast data on 3,4,5, or 6 segments of 1/4 or less of 32 segments or 42 segments in a 207.5 to 222 MHz or 90 to 108 MHz transmission channel of multimedia broadcasting As shown in FIG. 16, the broadcast wave received by the repeater is the same 3, 4, 5, or 6 segments (f0 in FIG. 2) as the same broadcast data and the third, 4, 5, or 6 segments other than the 3, 4, 5 or 6 segments. 1, 3, 4, 5, or 6 segments (f 1 in FIG. 2), and the repeater transmits broadcast data of specified 3 or 4 segments (f 0 in FIG. 2) from the received broadcast wave. The broadcast data of the first 3, 4, 5 or 6 segments (f1 in FIG. 2) of the received broadcast wave is removed, and the specified 3, 4, 5 or 6 segments (f0 in FIG. 2) and the first 1, 3, 4, 5 or 6 segments The second 3, 4, 5 or 6 segment (f2 in FIG. 2) other than the first segment, the specified 3, 4, 5 or 6 segment (f0 in FIG. 2) and the first 3, 4, 5 or 6 segment. (B1 in FIG. 2) and the third 3, 4, 5 or 6 segments (f3 in FIG. 2) other than the second 3, 4, 5 or 6 segments are transmitted respectively. .

In addition, as shown in FIG. 21 of a schematic diagram of a partial segment number transmitted by a broken line relay broadcast of a 4-segment broadcast on a terrestrial broadcast channel according to an embodiment of the present invention, in a 4-segment educational television broadcast, In a repeater that relays broadcast waves with broadcast data on four specified segments in the 13 segments of terrestrial digital broadcasting, the broadcast waves received by the repeater are the same as the four segments specified by the same broadcast data. The relay unit removes the broadcast data of the specified four segments (f0 in FIG. 21) from the broadcast wave to be received and receives the first four segments other than the four segments. Broadcast data of the first four segments (f1 in FIG. 21) of the broadcast wave are converted into four specified segments (f0 in FIG. 21) and the four specified segments. And transmitting each of the loaded recombinant was broadcast wave with the first four non-segment second four segments (f2 in FIG. 21).
Here, in both the three-segment broadcast and the four-segment broadcast, the specified segment is preferably in the center of the broadcast transmission channel, and the first segment and the second segment are preferably on both sides of the broadcast transmission channel.

  First, it is possible to extend the distance of 64QAM by improving 4-diver reception at the four corners of the large screen. Therefore, the present invention can be applied not only to QPSK for one-segment broadcasting used for broadcasting for mobile terminals but also to 64QAM. Furthermore, if an organic EL receiver is commercialized, it will be easy to receive a large screen with solar power generation and a rechargeable battery. Therefore, the present invention can be applied not only to one-segment broadcast broadcasting but also to HDTV relay broadcasting such as SDTV, 1080 / 60i, 1080 / 50i, 720 / 60p, and 720 / 50p.

Here, in the schematic diagrams of the two sets of two-segment two-dimensional relay broadcasting on the terrestrial broadcasting channel of one embodiment of the present invention of FIGS. 13 to 15, the 6 MHz channel is divided into 14 in Japan and the former NTSC region, etc. to 428 kHz. There are 13 segments in the EU, most of the old PAL region and most of the old SECAM region, etc., and the 7 MHz channel is divided into 14 segments at 500 kHz, and there are 13 segments in Indonesia, the old PAL region, the old SECAM region, etc. Then, the 8 MHz channel is divided into 14 and is 13 segments at 571 kHz. That is, the segment band is proportional to the channel band, and the number of segments is 13.
The required transmission bandwidth for 64QAM terrestrial digital broadcasting at 3: 1: 0 sampling is higher than that of MPEG-2 due to advances in video coding technology. H.264 is half and HEVC (High Efficiency Video Codec) is ¼.
Therefore, the necessary transmission band of 1080 / 60i is 5.14 MHz (12 segments) in MPEG-2 and 1.29 MHz in HEVC. In the 428 kHz segment of the 6 MHz channel in Japan, the former NTSC region, etc., it is possible to transmit at 3 segments 1.29 MHz.
The required transmission bandwidth of 1080 / 50i is 4.285MHz for MPEG-2 and 1.071MHz for HEVC, and 2 segments for 571kHz segment of 8MHz channel in some parts of Indonesia and the old PAL region and the old SECAM region. Can be transmitted. In the 500 kHz segment of the 7 MHz channel such as most of the EU and the old PAL region and most of the old SECAM region, transmission can be performed at 3 segments 1.5 MHz.
By the way, the required transmission band of SDTV in 64QAM of terrestrial digital broadcasting is 1.71 MHz (4 segments) in MPEG-2 and 428 kHz in HEVC. It can be transmitted in one segment on 6MHz channel in Japan, 7MHz channel in EU or 8MHz channel in Indonesia.

Further, it is possible to transmit data in 1080 / 50i by LPDC (Low Density Parity Check) code in 2 segments of 1 MHz or less of 500 kHz segment of 7 MHz channel.
Furthermore, even with 1080 / 60i, if polarization MIMO (Multi In Multi Out) is used, transmission is possible at 2 segments 856 kHz or less of the 428 kHz segment of the 6 MHz channel.

  Moreover, if the loss of the high-speed communication optical cable is reduced, it becomes easy to install the non-feed submarine optical cable on the islands. Therefore, the present invention can be applied not only to relay broadcast of satellite broadcast reception but also to relay broadcast of optical cable reception.

  ADVANTAGE OF THE INVENTION According to this invention, the relay transmission which prevented the influence by a wraparound can be implement | achieved by utilizing effectively the some frequency (segment) in the transmission channel of broadcasting. Further, it is possible to realize a relay transmission system for partial segment broadcasting that is not affected by wraparound and can perform multistage relaying and can construct an SFN. Moreover, area broadcasting by multistage relay can be realized with high quality, and radio waves can be used effectively.

1: transmitter, 2, 3: repeater, 6: relay broadcast receiver, 7: demodulator (DEM),
8: Modulator (MOD) (transposing segments), 9: Transmitter,
11: GPS receiving unit, 12: determination unit (CPU), 13: multiplexing unit (MUX),
14: Satellite broadcast receiver, 15: GPS receiver, 16: Light receiver,
17, 18: Demodulator (DEM), 19: Multiplexer (MUX),
20: Modulator (MOD), 21: Transmitter,
R1: Satellite broadcast receiving antenna, R2, R3: Relay broadcast receiving antenna,
G1, G2, G3: GPS receiving antenna,
T1, T2, T3: Relay broadcast transmission antenna,
f0: prescribed partial segment, f1: first partial segment, f2: second partial segment,
f3: third partial segment, f4: fourth partial segment,

Claims (4)

A broadcast wave relay method in a relay broadcast system for relaying a broadcast wave in which broadcast data is placed on a specified partial segment of a plurality of segments,
The same broadcast data is transmitted on the specified partial segment and the broadcast wave loaded on the first partial segment other than the specified partial segment,
The first partial segment of the broadcast wave is received, the specified partial segment, the ID of the broadcast station to which the broadcast wave is transmitted, the GPS position information of the broadcast station to which the broadcast wave is transmitted, and the own station Based on the GPS position information, the received broadcast wave is replaced with either the second partial segment, the third partial segment, or the fourth partial segment, and a primary relay broadcast wave is transmitted.
When either the second partial segment, the third partial segment or the fourth partial segment of the primary relay broadcast wave is received and the second partial segment of the primary relay broadcast wave is received The secondary relay broadcast wave is transmitted by transposing the received primary relay broadcast wave to either the specified partial segment and the third partial segment or the fourth partial segment, and the primary relay When the third partial segment of the broadcast wave is received, the received primary relay broadcast wave is placed on the specified partial segment and either the second partial segment or the fourth partial segment. Instead, when the secondary relay broadcast wave is transmitted and the fourth partial segment of the primary relay broadcast wave is received, the prescribed partial segment and the second partial segment are transmitted. Or relay method of the broadcast wave and transmits the third secondary relay broadcast waves instead placing the primary relay broadcast waves thus received into any part segments.   2. The broadcast wave relay method according to claim 1, wherein a channel band of the broadcast wave is set to 8 MHz, the 8 MHz band is divided into 14 segments to form 13 segments at 571 kHz, and broadcast waves for transmitting content by 2 segments are different from each other. 2. A broadcast wave relay method, wherein two sets of segments are transmitted as one set of segments, respectively. A broadcast wave relay method in a relay broadcast system that relays broadcast waves carrying broadcast data on a partial segment of 1/5 or less of the total number of segments in a plurality of segments of 5 or more in a broadcast transmission channel There,
A portion less than 1/5 of the first total number of segments other than a partial segment of which the same broadcast data is less than 1/5 of the total number of segments specified and a partial segment of less than 1/5 of the total number of segments specified Send broadcast waves placed on each segment,
Receiving said broadcast wave, the broadcast data is removed of the received 1/5 subsegments of該全number of segments specified from the broadcast wave, the first該全number of segments of the broadcast waves thus received 1 / Broadcast data of 5 or less partial segments is divided into a partial segment of 1/5 or less of the specified total number of segments, a partial segment of 1/5 or less of the specified total number of segments, and 1 of the first total number of segments. A broadcast wave relaying method, comprising: transmitting a broadcast wave that is replaced with each of the second partial segments other than partial segments of / 5 or less to the second partial segment of the total number of segments. A broadcast wave relay method in a relay broadcast system that relays a broadcast wave in which broadcast data is placed on a prescribed N segment in a segment of 4N (N is a natural number) or more,
The same broadcast data is transmitted as a broadcast wave loaded on the specified N segment and the first N segment other than the specified N segment,
The first N segment of the broadcast wave is received, the specified N segment, the ID of the broadcast station to which the broadcast wave is transmitted, the GPS position information of the broadcast station to which the broadcast wave is transmitted, and the own station Based on the GPS position information, the received broadcast wave is replaced with either the second N segment, the third N segment, or the fourth N segment, and a primary relay broadcast wave is transmitted.
When either the second N segment, the third N segment or the fourth N segment of the primary relay broadcast wave is received and the second N segment of the primary relay broadcast wave is received The secondary relay broadcast wave is transmitted by transposing the received primary relay broadcast wave to either the prescribed N segment and the third N segment or the fourth N segment, and the primary relay upon receiving the third N segment broadcast wave, and N segments of the prescribed, the primary relay broadcast waves thus received into one of said second N segment or the fourth N segments placed If a secondary relay broadcast wave is transmitted instead and the fourth N segment of the primary relay broadcast wave is received, the specified N segment and the second N segment or the third N segment Segment Relay method of the broadcast wave and transmits one to the received primary relay broadcast wave secondary relay broadcast waves instead put the.

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