JP4534533B2 - Information transmission / reception processing system, receiving apparatus, and information transmission / reception processing method - Google Patents

Description

  The present invention relates to an information transmission / reception processing system, a receiving apparatus, and an information transmission / reception processing method suitable for application to a studio wireless imaging system, a stage wireless imaging system, and the like. Specifically, when transmitting / receiving transmission information within a wireless reception area, a reception device is arranged in advance in the wireless reception area and cascaded between the reception devices so that a wireless reception processing system can be constructed. In addition, a signal can be processed based on a received signal transmitted from a receiving apparatus that has received transmission information with the best signal quality among a plurality of receiving apparatuses.

  Conventionally, radio waves are often used as a medium for transmitting information. For example, in the audio processing field, an information transmission / reception processing system including a wireless microphone is often used in a station premises, a karaoke shop, or the like.

  16A and 16B are block diagrams illustrating a configuration example of the first information transmission / reception processing system 10 according to the related art. According to the information transmission / reception system 10 shown in FIG. 16A, a microphone body with a wireless transmission function or the like (hereinafter simply referred to as a transmission device 4), its reception device 1, a voice processing device 7, and the like are provided. The transmission device 4 is movable, the main body thereof is provided with an antenna 8, and the reception device is provided with an antenna 13. In this system 10, a voice signal collected by a microphone (not shown) is modulated by a transmission device 4 into a carrier wave signal. The modulated transmission radio wave is radiated toward the receiving device 1. In the receiving device 1, the transmission radio wave is received and demodulated. An audio processing device 7 is connected to the receiving device 1 so that the demodulated audio signal is amplified and output in a loud sound.

  FIG. 16B is a block diagram illustrating an example of transmission when the shielding object is affected. When the shielding object 5 is interposed between the transmission device 40 and the reception device 1 illustrated in FIG. 16B, a situation in which good transmission processing cannot be performed often occurs. In particular, when a millimeter wave having high straightness is used as the transmission radio wave, the influence of the shielding 5 appears remarkably, and the voice (communication) output from the voice processing device 7 may be interrupted.

FIG. 17 is a block diagram showing a configuration example of the second information transmission / reception processing system 80 according to the conventional example.
An information transmission / reception processing system 80 shown in FIG. 17 is an improvement of the information transmission / reception system 10. The improvement is a method of simultaneously receiving a single transmission radio wave by a plurality of receiving apparatuses 1 to 3. If this method is used, for example, even if the path between the transmission device 4 and the reception device 1 is blocked by the shield 5, the same transmission radio wave (hereinafter also referred to as transmission information) is transmitted between the reception device 2 and the reception device 3. Since the signal is received, the signal can be reliably received.

An audio processing device 71 is connected to the output stages of the three receiving devices 1 to 3. The receiving device 1 and the sound processing device 71 are connected by a communication cable having a length L1, and the receiving device 2 and the sound processing device 71 are connected by a communication cable having a length L2, and The audio processing device 71 is connected by a communication cable having a length L3.
The length of the communication cable depends on the mounting position of the receiving devices 1 to 3, but L1 is about 30 m, L2 is about 25 m, and L3 is about 20 m. For convenience, three communication cables are required. The sound processing device 71 detects the highest quality sound signal output from the three receiving devices 1 to 3 and performs sound processing or the like.

  In relation to this type of information transmission / reception processing system, Patent Document 1 discloses an indoor wireless communication system. According to this system, when performing information transmission / reception processing between a master unit and a slave unit in a room where a person exists or a shield such as a fixture is placed, the antenna with a sharp directivity is connected to the master unit. A reflecting mirror and a sub-reflecting mirror are disposed so as to be attached to the slave unit and bypass a shield such as a fixture. Transmitted radio waves radiated from the antenna of the main unit are received via the propagation path from the antenna to the reflector, the propagation path from the reflector to the sub-reflector, and the propagation path from the sub-reflector to the sub-unit antenna. Is done.

  When the system is configured in this way, even if a person's movement or a shield such as a fixture is closed on a communication path through which the slave unit can be seen directly, multipaths can be generated without being affected by the shield. It can be greatly reduced and a communication channel can be secured.

Japanese Patent Laid-Open No. 9-51293 (page 3, FIG. 1)

  Incidentally, the second information transmission / reception processing system according to the conventional example has the following problems.

  i. The audio processing device 71 requires three signals regardless of the presence or absence of the shielding object 5 even though only the signal having the highest quality among the signals transmitted from the three receiving devices 1 to 3 is required. All audio signals (hereinafter also referred to as reception signals) from the receiving devices 1 to 3 must be transmitted to the audio processing device 71.

  ii. Further, as the number of receiving devices increases, the number of communication cables also increases, and the wiring situation becomes more complicated.

  iii. If the number of receiving devices is increased, the number of input terminals of a sound processing device (hereinafter also simply referred to as a signal processing device) 71 must be increased at the same time, which lacks expandability.

  iv. According to Patent Document 1, a plurality of reflecting mirrors and sub-reflecting mirrors must be provided in the room, and the facilities become large, or the building itself must be modified.

  Therefore, the present invention solves such a conventional problem, and devise the connection between the receiving devices to transmit from the receiving device that has received the transmission information with the best signal quality among the plurality of receiving devices. An object of the present invention is to provide an information transmission / reception processing system, a receiving apparatus, and an information transmission / reception processing method capable of performing signal processing based on a received signal.

Problems described above, a transmitting apparatus for wirelessly transmitting the transmission information-free line received area is movement operation, a plurality of receiving devices for receiving the transmission information transmitted at the same time from the transmitting device, transmitted from the receiving device A signal processing device that performs signal processing based on the received signal, a receiving device that receives the transmission information and outputs the received signal, and a memory that holds the received signal output from the receiving device A signal comparison / selection means for comparing the received signal held in the memory with the received signal sent from the preceding receiving device, selecting the receiving signal having the better signal quality and transferring it to the succeeding receiving device; It has, disposed in advance in the radio reception area, and, between the receiving apparatus can be solved by the information transmission and reception processing system that will be cascaded.

  According to the information transmission / reception processing system according to the present invention, when transmitting / receiving transmission information in a wireless reception area, the transmission apparatus wirelessly transmits the transmission information by moving in the wireless reception area. In addition, a plurality of reception devices that are arranged in advance in the wireless reception area and cascade-connected receive transmission information transmitted from the transmission device.

  Therefore, a wireless reception processing system in which the receiving devices are connected in a daisy chain with a communication cable can be constructed, so that there is no need to route the communication cable for the receiving device as in the conventional method. In addition, when the number of receiving devices is increased, the system can be easily expanded by simply cascading additional receiving devices to the receiving device connected to the final end in the system.

In each receiving device, for example, a received signal related to transmission information received by the receiving device is held in a memory, and a received signal held in the memory and a received signal sent from another receiving device Are compared, and the received signal having the better signal quality is selected and transferred to the receiving device at the subsequent stage (signal comparison / selection function). Accordingly, it is possible to extract the reception signal of the receiving apparatus that has received the transmission information with the best signal quality among the plurality of receiving apparatuses.

  Based on this assumption, the signal processing device performs signal processing based on the received signal transmitted from the receiving device. The signal processing apparatus can perform signal processing based on the received signal having the best signal quality transmitted from the receiving apparatus extracted earlier. Moreover, even if the transmission device moves within the wireless reception area and the reception status of transmission information in each reception device changes, each reception device adapts to the change and always determines a signal with good quality in real time. The received signal can be transmitted to the signal processing device.

  Therefore, the reception signal that reaches the signal processing device is always only the highest quality transmission information among the transmission information received by the information transmission / reception processing system, and the signal processing device again determines the quality of the reception signal transmitted from the reception device. There is no need to do.

Receiving apparatus according to the present invention includes a receiving means for outputting the received signal to transmit information and receive wirelessly transmitted from the transmitting apparatus to be moved operating a wireless reception area, a reception signal output from the receiving means A signal that compares the stored memory, the received signal held in the memory, and the received signal sent from the preceding receiving device, selects the receiving signal with the better signal quality, and transfers it to the succeeding receiving device And a comparative selection means.

According to the receiving device of the present invention, when wirelessly transmitting transmission information wirelessly transmitted from a transmitting device that is operated to move within the wireless reception area, the receiving means receives the transmission information and outputs a received signal. To do. Assuming this, the memory holds the received signal output from the receiving means, and the signal comparison / selection means compares the received signal held in the memory with the received signal sent from the preceding receiving device. Then, the received signal having the better signal quality is selected and transferred to the subsequent receiving apparatus. Accordingly, it is possible to extract the reception signal of the receiving apparatus that has received the transmission information with the best signal quality among the plurality of receiving apparatuses.

Information transmission and reception processing method according to the present invention arranges a plurality of receiving devices to pre Me radio reception area, and a step of cascading the receiving device, transmits information by moving the transmission device in the radio reception area And transmitting the transmission information from the transmitting device to the receiving device, receiving the transmission information transmitted from the transmitting device by the receiving device, and outputting the received signal, and outputting from the receiving device The process of holding the received signal, the held received signal, and the received signal sent from one or more previous receiving apparatuses are compared, and the received signal having the better signal quality is selected and the subsequent stage And transferring to the receiving device .

  According to the information transmission / reception processing method of the present invention, when transmission information is transmitted / received in a wireless reception area, the receiving apparatuses can be connected like a daisy chain with a communication cable. There is no need to route the communication cable. In addition, signal processing can be performed based on the received signal transmitted from the receiving device that has received the transmission information with the best signal quality among the plurality of receiving devices.

According to the information transmission / reception processing system and the information transmission / reception processing method according to the present invention, when transmission / reception processing is performed in a wireless reception area, a plurality of reception devices are arranged in the wireless reception area in advance, and the reception device They are cascaded. In addition, the reception signal output from the reception device is held, and the received reception signal is compared with the reception signal transmitted from one or more previous reception devices, and the reception signal having the better signal quality is compared. Is selected and transferred to the receiving device at the subsequent stage.

  With this configuration, it is possible to construct a wireless reception processing system in which the receiving devices are connected in a daisy chain with a communication cable, so that there is no need to route the communication cable for the receiving device as in the conventional method. In addition, when the number of receiving devices is increased, the system can be easily expanded by simply cascading additional receiving devices to the receiving device connected to the final end in the system. In addition, signal processing can be performed based on a received signal transmitted from a receiving apparatus that has received transmission information with the best signal quality among a plurality of receiving apparatuses.

According to the receiving apparatus according to the present invention, when receiving transmission information transmitted wirelessly from a transmitting apparatus that is operated to move within the wireless receiving area, a reception signal output from a receiving means that has received the transmission information. The received signal output from the receiving means , the received signal held in the memory, and the received signal sent from the receiving device in the previous stage, and the received signal with the better signal quality is Signal comparison / selection means for selecting and transferring to a subsequent receiving apparatus is provided.

With this configuration, transmission information received simultaneously by a plurality of receiving apparatuses can be compared, and a reception signal of a receiving apparatus that has received transmission information with the best signal quality among the plurality of receiving apparatuses can be extracted. Therefore, the receiving apparatus can be sufficiently applied to a studio radio imaging system of a broadcasting station, a stage radio imaging system of a theater, and the like.

  Next, an embodiment of an information transmission / reception processing system, a receiving apparatus and an information transmission / reception processing method according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of an information transmission / reception processing system 100 as a first embodiment according to the present invention.
In this embodiment, when transmitting / receiving transmission information within a wireless reception area, a plurality of reception devices are arranged in advance in the wireless reception area, and the reception devices are cascade-connected to form a wireless reception processing system. In addition to being able to be constructed, a signal can be processed based on a received signal transmitted from a receiving apparatus that has received transmission information with the best signal quality among a plurality of receiving apparatuses.

  An information transmission / reception processing system 100 shown in FIG. 1 is a system that performs transmission / reception processing of transmission information within a wireless reception area. This system 100 is suitable for application to a studio wireless photography system and a stage wireless photography system. The information transmission / reception processing system 100 includes a transmission device 4 to which an antenna 8 is attached, a plurality of reception devices 101 to which an antenna 13 is attached, and a signal processing device 61. The transmission device 4 is operated to move within the wireless reception area, acquires transmission information, and transmits the transmission information from the antenna 8 as a radio wave. As the transmission device 4, a photographing machine with a wireless transmission function, a wireless microphone, or the like is used.

  For example, three receiving apparatuses 101, 102, and 103 are arranged in the wireless reception area that can be seen from the transmitting apparatus 4, and wireless radio waves (transmission information) transmitted from the transmitting apparatus 4 are respectively transmitted via the antenna 13. It is made to receive. The three receiving apparatuses 101, 102, and 103 operate so as to simultaneously receive transmission information from the single transmitting apparatus 4.

  In this example, the three receiving apparatuses 101, 102, and 103 are connected in cascade (vertical). Each of the receiving apparatuses 101, 102, and 103 is provided with a data input terminal 11 and a data output terminal 19 as shown in FIG. The data output terminal 19 of the first-stage receiving apparatus 101 is cascade-connected to the data input terminal 11 of the next-stage receiving apparatus 102 through a coaxial cable 21 having a length L1 '. A terminal resistor or the like (not shown) is connected to the data input terminal 11 of the receiving apparatus 101. The data output terminal 19 of the receiving apparatus 102 is cascade-connected to the data input terminal 11 of the receiving apparatus 103 at the final stage through a coaxial cable 22 having a length L2 '.

  The data output terminal 19 of the receiving device 103 is wired to the data input terminal 11 of the signal processing device 61 through the coaxial cable 23 having a length L3 ′, and performs signal processing based on the received signal transmitted from the receiving device 103. To be made. The length L0 of the communication cable from the receiving device 10 to the signal processing device 61 is L1 '+ L2' + L3 ', which can be the length (30 m) of the communication cable L1 shown in FIG.

  In this example, the receiving apparatus 101 does not directly transmit the received signal received from the transmitting apparatus 4 to the signal processing apparatus 61 but first transmits it to the adjacent receiving apparatus 102. That is, the signal received by the receiving apparatus 101 is transmitted to the receiving apparatus 102. The receiving apparatus 102 compares the quality of the received signal received by the apparatus itself from the transmitting apparatus 4 with the quality of the received signal transmitted from the receiving apparatus 101, and only receives a signal of good quality to the next receiving apparatus 103 or The data is transmitted to the signal processing device 61 (relay control of received data).

  By adopting such a transmission method, theoretically, only one wiring (coaxial cables 21 to 23) is input to the signal processing device 61, and the signal reaching the signal processing device 61 is There will always be only the highest quality signal in the system.

FIG. 2 is a block diagram illustrating an internal configuration example of the receiving apparatus 102 and the like. Since the receiving apparatuses 101 and 103 have the same configuration, the description thereof is omitted.
2 includes a data input terminal 11, a signal receiving unit 12, an antenna 13, a radio wave receiving unit 14, a synchronization detecting unit 15, memories M1 and M2, a data output terminal 19, and a signal comparison and transmission unit 20. ing. The antenna 13 is connected to a radio wave receiver 14 as an example of a receiving unit. The radio wave receiver 14 receives a radio wave signal (transmission information) from the transmission device 4 through the antenna 13.

  When receiving the radio signal (transmitted radio wave), the radio wave receiver 14 demodulates the radio signal. The demodulated received data DIN0 ′, that is, the transmission information transmitted from the transmission device 4, includes a synchronization signal Sync for synchronizing the data signal (DATA) transmitted from the transmission device 4, and a data signal ( DATA). The radio wave receiver 14 measures a bit error rate (BER) indicating how much the data obtained when demodulating the radio wave signal is incorrect, and generates a quality signal Sq indicating the quality of the data.

  The radio wave receiver 14 generates data DIN0 in which the quality signal Sq measured at the time of demodulation is inserted into all the received data DIN0 'received from the transmitter 4, and transfers the data DIN0 to the memory M1. A memory M1 is connected to the radio wave receiver 14, and the reception data DIN0 output from the radio wave receiver 14 is held. For the memory M1, a RAM or SDRAM is used. The radio wave receiver 14 outputs the quality signal Sq measured when demodulating the data to the quality determiner 16. Further, the radio wave receiver 14 extracts the synchronization signal Sync and outputs it to the synchronization detector 15.

  On the other hand, the signal receiving unit 12 is connected to the data input terminal 11 described above, and the received data DIN1 transmitted from the receiving apparatus 101 at the previous stage is received through the data input terminal 11. The signal receiver 12 receives the received data DIN1. The received data DIN1 includes a synchronization signal Sync ′ for synchronizing the data signal (DATA) sent from the preceding receiving apparatus 101, a quality signal Sq ′ representing the quality of the data, and a data signal (DATA ′). )It is included.

  The signal receiving unit 12 transfers all the received data DIN1 received from the preceding receiving device 101 to the memory M2. A memory M2 is connected to the signal receiving unit 12, and the received data DIN1 output from the signal receiving unit 12 is held. For the memory M2, RAM or SDRAM is used. Further, the signal receiving unit 12 extracts the quality signal Sq ′ from the reception data DIN <b> 1 and outputs it to the quality determination unit 16. Further, the signal receiving unit 12 extracts the synchronization signal Sync ′ and outputs it to the synchronization detection unit 15.

  A synchronization detector 15 is connected to the memories M1 and M2 described above to detect a time lag between the synchronization signal Sync output from the radio wave receiver 14 and the synchronization signal Sync ′ output from the signal receiver 12. A new synchronization signal Sync is generated to control the output timings of the reception data DIN0 read from the memory M1 and the reception data DIN1 read from the memory M2. In addition, the synchronization detection unit 15 outputs the newly generated synchronization signal Sync to the quality determination unit 16 and controls the determination timing.

In addition to the synchronization detector 15, the signal comparison / selection means 20 is connected to the memories M 1 and M 2, and is sent from the quality signal Sq output from the memory M 1 and the preceding receiving apparatus 101 output from the memory M 2. comparing the quality signal Sq ', it made the received data DIN0 or DIN1 of the better signal quality to forward to the subsequent stage of the receiving apparatus 10 3.

  The signal comparison / selection means 20 includes a quality determination unit 16, a data selection unit 17, and a data output unit 18. In the quality determination unit 16, the quality signal Sq read from the memory M1 and the quality signal Sq ′ sent from the preceding receiving device 101 read from the memory M2 are based on the timing of the newly generated synchronization signal Sync. A comparison is made to determine the quality. Based on the comparison determination result, the quality determination unit 16 generates the data selection signal Sc.

  The quality determination unit 16 uses a determination device including a CPU and an MPU. The quality determination unit 16 outputs the data selection signal Sc to the data selection unit 17, selects the reception data DIN 0 or DIN 1 having the better quality, and sends the data selection unit 17 to the signal transmission unit 18. Control.

The data selection unit 17 and the signal transmission unit 18 described above constitute a repeater. The data selection unit 17 selects the reception data DIN0 or DIN1 having the better signal quality based on the data selection signal Sc output from the quality determination unit 16. A signal transmission unit 18 is connected to the data selection unit 17, and the selected reception data DIN0 or DIN1 is transferred as transmission data DOUT to the subsequent receiving apparatus 103 or the like through the data output terminal 19.

  3A to 3C are diagrams showing examples of formats (structures) of the reception data DIN0 and DIN1 and the transmission data DOUT. The reception data DIN0 shown in FIG. 3A is a demodulated signal output from the radio wave receiver 14. The reception data DIN0 includes a synchronization signal Sync for synchronizing the data signal (DATA) sent from the transmission device 4, a quality signal Sq indicating the quality of the data, and a data signal (DATA). . These three signals are regularly arranged at regular intervals. For example, the reception data DIN0 is composed of Sync2 + Sq2 + DATA2,..., Sync256 + Sq256 + DATA256 following Sync1 + Sq1 + DATA1.

  The reception data DIN1 shown in FIG. 3B is a signal input from the reception device 101 in the previous stage to the signal reception unit 12. When viewed from the receiving device 101 at the preceding stage, the transmission data DOUT is output from the signal transmission unit 18 to the receiving device 102. The received data DIN1 includes a synchronization signal Sync ′ for synchronizing the data signal (DATA ′) sent from the preceding receiving apparatus 101, a quality signal Sq ′ representing the quality of the data, and a data signal (DATA ′). )It is included. These three signals are regularly arranged at regular intervals. For example, the reception data DIN1 is made up of Sync1 '+ Sq1' + DATA1 ', followed by Sync2' + Sq2 '+ DATA2', ..., Sync256 '+ Sq256' + DATA256 '.

  The transmission data DOUT shown in FIG. 3C is a signal output from the signal transmission 18 to the receiving device 103 in the next stage. When viewed from the receiving device 103 at the subsequent stage, the received data DIN1 is input to the signal receiving unit 12. The transmission data DOUT includes a synchronization signal Sync for synchronizing the data signal (DATA) to be transferred to the next receiving apparatus 103, a quality signal Sq indicating the quality of the data, and a data signal (DATA). . These three signals are regularly arranged at regular intervals. For example, when the received signal with good quality is the received data DIN0 received by the receiving device 102, the transmission data DOUT composed of Sync2 + Sq2 + DATA2,... It is sent to the receiving device 103 or the like.

  As described above, when the receiving apparatus 102 and the like are configured, it is possible to extract the reception data DIN1 of the receiving apparatus 102 and the like that have received the transmission radio wave having the best signal quality among the three receiving apparatuses 101 to 103. As a result, only a high-quality received signal (transmission data DOUT) can be sent to the subsequent receiving apparatus 103 or the like.

  Moreover, even when the gap between the transmission apparatus 4 and, for example, the reception apparatus 101 is shielded, the transmission information optimally received from the transmission apparatus 4 is transferred to the signal processing apparatus 61 in the other reception apparatuses 102 and 103. Thus, the signal processing device 61 can perform signal processing so that the received signal is not interrupted. Therefore, the receiving apparatuses 101 to 103 and the like can be sufficiently applied to a studio radio imaging system of a broadcasting station.

  Next, an information transmission / reception processing method according to the present invention will be described. 4A to 4D are time charts showing examples of data comparison / selection processing in the information transmission / reception processing system 100. FIG. 5A to 5C are conceptual diagrams illustrating examples of data storage in the memories M1 and M2 of the three receiving apparatuses 101 to 103, respectively.

  In this embodiment, in the case where transmission information wirelessly transmitted from the transmission device 4 operated to move within the wireless reception area is subjected to wireless reception processing, transmission radio waves (transmission information) radiated from the transmission device 4 are shielded. When it is assumed that there is no object, it is assumed that all the receiving apparatuses 101 to 103 reach simultaneously. Further, an example will be given in which it takes T [seconds] from reception of a transmission radio wave by the reception device 101 or the like in the preceding stage until the reception data DIN0 or DIN1 is selected and transmitted to the reception device 102 or the like in the subsequent stage.

  Further, the quality determination process in the system 100 is sequentially shifted from the first stage to the last stage. In this example, the quality determination units 16 of the receiving apparatuses 102 and 103 compare the quality signals Sq and Sq ′, and the reception data DIN0, DIN1 and the like that have been transmitted by the signal transmission unit 18 are sequentially deleted (abandoned). . Further, the memory contents at the same time are shown in the storage state as shown in FIGS.

  With these as signal comparison and transmission conditions, the transmission device 4 is moved in the wireless reception area to acquire transmission information, and wirelessly transmits the transmission information. The three receiving devices 101 to 103 that are arranged in advance in the wireless reception area and cascade-connected receive the transmission radio wave transmitted from the transmitting device 4.

  The radio wave receiver 14 of each of the receiving devices 101 to 103 receives a transmission radio wave (transmission information) and outputs reception data DIN0 to the memory M1. In the memory M1 of the receiving apparatus 101 shown in FIG. 4A, the reception data DIN0 indicated by the satin, which is the storage content surrounded by the wavy line, is input from the radio wave receiving unit 14 at the current time t0. In addition, at time t-1 T seconds before the current time t0, the reception data DIN0 as indicated by hatching is stored, and is deleted at the current time t0. Furthermore, the reception data DIN0 as shown by the horizontal line is stored at time t-2 2 × T seconds before the current time t0, and is deleted at the current time t0.

  That is, only the reception data DIN0 indicated by the satin received from the transmission device 4 at the current time t = t0 is stored in the memory M1 of the reception device 101 illustrated in FIG. 5A. The received data DIN0 indicated by the oblique lines and the horizontal lines shown in FIG. 4A has already been sent to the receiving device 102 in the next stage at the present time t0, and therefore does not exist in the memory M1 in FIG. 5A.

  Note that the memory M2 of the receiving apparatus 101 is not used because the receiving apparatus 101 is located in the first stage, and is left empty. This is because the reception device 101 does not require quality determination processing, and therefore, the received data DIN0 is sent as it is to the next receiving device 102 as the transmission data DOUT. At this time point t-1 and t-2, the other receiving apparatuses 102 and 103 hold the quality determination process because there is no received data DIN1 from the receiving apparatus 101, and as shown in FIGS. Received data DIN0 is stored in the memory M1.

  Further, at time t1 T seconds after the current time t0 shown in FIG. 4A, the reception data DIN0 as indicated by the “*” symbol is received, and similarly at time t2, the reception data DIN0 as indicated by the small circle mark is received. A case where the received data DIN0 is received and stored in the memory M1 is shown.

  Further, in the memory M1 of the receiving device 102 shown in FIG. 4B, the received data DIN0 that is received from the transmitting device 4 at the present time t0 and that is the storage content surrounded by the wavy line, and is indicated by the oblique lines at the time t−1 Received data DIN0 is stored. That is, the memory M1 of the receiving apparatus 102 shown in FIG. 5B stores the reception data DIN0 shown in the satin received at the current time t0 and the hatched reception data DIN0 at the time t-1. The hatched reception data DIN0 is held for comparison with the hatched reception data DIN1 sent from the receiving apparatus 101 at the preceding stage.

  In addition, in the memory M2 of the receiving apparatus 102 shown in FIG. 5B, the hatched reception data DIN1 just received from the receiving apparatus 101 is stored with a shift of T seconds. At the present time t0, the signal comparison and detection means 20 compares the quality of the hatched reception data DIN1 just received from the preceding receiving apparatus 101 with the hatched reception data DIN0 already stored in the memory M1 at the time t-1. To execute the judgment process. At this time point t-1, since there is no reception data DIN1 from the reception device 102, the reception device 103 accumulates the reception data DIN0 in the memory M1 while suspending the quality determination process.

  In the receiving apparatus 102, the quality signal Sq is output from the memory M1 to the quality determination unit 16. The signal receiving unit 12 extracts the quality signal Sq ′ from the reception data DIN1 sent from the preceding receiving apparatus 101 and outputs the quality signal Sq ′ to the quality determining unit 16. The synchronization detection unit 15 detects a shift of T seconds, and outputs a new synchronization signal sync to the quality determination unit 16 and the memories M1 and M2. The quality judgment unit 16 compares the same received data DIN0 and DIN1 with each other based on the synchronization signal Sync.

  Based on the determination result, the reception data DIN0 or the reception data DIN1 is transmitted as the transmission data DOUT to the reception device 103 at the next stage. In FIG. 4B, the reception data DIN0 indicated by the horizontal line at time t-2 of the receiving apparatus 102 has already been sent to the receiving apparatus 103 at the next stage, and therefore, in the memory M1 as shown in FIG. 5B. Does not exist.

  Also, in the memory M1 of the receiving apparatus 103 shown in FIG. 4C, the reception data DIN0 shown in the satin as the stored contents surrounded by the wavy line received from the transmitting apparatus 4 at the current time t0, and the reception shown by the oblique lines at the time t−1. Data DIN0 and reception data DIN0 indicated by hatching at time t-2 are stored (see FIG. 5C). The horizontal line received data DIN0 is held for comparison with the horizontal line received data DIN1 sent from the receiving device 102 at the preceding stage.

  That is, in the memory M2 of the receiving apparatus 103 shown in FIG. 4C, received data DIN1 indicated by a horizontal line that is finally received from the receiving apparatus 102 at the preceding stage with a shift of 2 × T seconds for convenience for T seconds is stored. The horizontal line received data DIN1 received from the preceding receiving apparatus 102 is compared with the horizontal line received data DIN0 at time t-2 already stored in the memory M1 by the signal comparison / transmission means 20. For example, a shift of 2 × T seconds is detected by the synchronization detection unit 15, and the same received data DIN0 and DIN1 are compared with each other based on the synchronization signal sync newly generated by the quality determination unit 16.

  The receiving device 103 sends the received data DIN0 or the received data DIN1 as the transmitted data DOUT to the signal processing device 61 based on the comparison determination result. That is, the transmission data DOUT shown in FIG. 4D is input to the signal processing device 61. The transmission data DOUT indicated by the optimum horizontal line shown in FIG. 4D is obtained by signal comparison and selection as follows. The reception data DIN0 received by the reception apparatus 101 is transferred to the memory M2 of the reception apparatus 102 at time t-1 in step P1 at time t-2 2 × T seconds before the current time t0.

  Thereafter, in step P2, the receiving device 102 compares the received data DIN0 indicated by the horizontal line read from the memory M1 of the receiving device 102 with the received data DIN0 indicated by the horizontal line read from the memory M2. As a result of the comparison, the reception data DIN0 or DIN1 indicated by the horizontal line determined to be optimal at the current time t0 of step P3 is transferred to the memory M2 of the reception device 103.

  In step P4, the receiving apparatus 103 receives the received data DIN0 indicated by the horizontal line read from the memory M1 of the receiving apparatus 103, and the received data DIN0 indicated by the horizontal line read from the memory M2 and determined to be optimum. Are compared. As a result of this comparison, reception data DIN0 or DIN1 indicated by the horizontal line determined to be optimal is output to the signal processing device 61. As a result, the signal processing device 61 performs signal processing based on the reception data DIN0 or the reception data DIN1 with the best signal quality transmitted from the reception device 103. The reception data DIN0 indicated by the oblique lines, satin, “*” symbol, and small circles are processed in the same manner.

  Thus, according to the information transmission / reception processing system and the information transmission / reception processing method as the first embodiment, when receiving / transmitting transmission information within the wireless reception area, the three receiving devices 101 to 103 are arranged, Wireless reception processing is performed by connecting the receiving devices 101 and 102 in a daisy chain manner using the coaxial cable 21, connecting the receiving devices 102 and 103 using the coaxial cable 22, and connecting the receiving device 103 and the signal processing device 61 using the coaxial cable 23. Since the system can be constructed, it is not necessary to route a communication cable or the like for each of the receiving apparatuses 101 to 103 as in the conventional method.

  In addition, when the number of receiving devices is increased, the system 100 can be easily expanded by simply cascading additional receiving devices to the receiving device 101 connected at the forefront of the system 100. Further, even when the transmission device 4 moves in the wireless reception area and the reception status of the transmission radio wave in each of the reception devices 101 to 103 changes, each of the reception devices 101 to 103 adapts to the change of the transmission radio wave. Thus, the reception data DIN0 and DIN1 with good quality can always be determined in real time, and the optimum transmission data DOUT can be transmitted to the signal processing device 61.

  Accordingly, the transmission data DOUT reaching the signal processing device 61 is always only the highest quality transmission radio wave among the transmission radio waves received by the information transmission / reception processing system 100. The processing device 61 does not need to make a quality determination again.

  The receiving apparatus 103 can accurately compare the quality of the received data DIN0 and DIN1 as long as it has a memory capacity of 3 × T seconds. This is such that the quality determination process is suspended for 2 × T seconds at the receiving apparatus 103. Therefore, the memory M1 of the receiving apparatus 103 is prepared with a memory capacity capable of storing the reception data DIN0 for 2 × T seconds and the reception data DIN0 for T seconds received from the transmission apparatus 4 at the present time. To be made.

  In addition, the receiving apparatus 102 is suspended from the quality determination process for 1 × T seconds. Accordingly, the memory M1 of the receiving apparatus 102 is prepared with a memory capacity capable of storing the reception data DIN0 for 1 × T seconds and the reception data DIN0 for T seconds received from the transmission apparatus 4 at the present time. The

FIG. 6 is a conceptual diagram showing a configuration example of a studio wireless photographing system 200 as a second embodiment according to the present invention. FIG. 7 is a block diagram showing an example of the configuration.
In this embodiment, the studio wireless photographing system 200 is configured by applying the information transmission / reception processing system described in the first embodiment, so that the number of communication cables and the like can be reduced even when the number of receiving devices is increased. At the same time, an optimum received signal can be transferred to the master room.

  A studio wireless photographing system 200 shown in FIG. 6 shoots a subject with a television camera 40 with a wireless transmission function in a studio 50 of a broadcasting station, receives transmission information (wireless radio waves) with a plurality of receiving devices, and receives the receiving devices. Then, the photographing signal is transferred to the master room 60 or the like.

  For example, the studio 50 includes nine receiving devices 201 to 209 and one television camera 40 with a wireless transmission function, which is an example of a transmitting device. The TV camera 40 is a signal cableless type and a battery-driven type, and includes a camera body on a pedestal with a caster so that it can be freely moved in the studio. The camera body is provided with an antenna 8 and a wireless transmission function, and radiates transmission radio waves (transmission information) from the antenna 8. A master room 60 is prepared outside the studio, and the signal processing device 6 is arranged in the master room 60.

  In this example, attachment members are provided in a lattice shape on the ceiling of the studio 50. A receiving device 201 or the like is attached to each lattice point of the attachment member. The receiving device 201 and the like are not limited to the ceiling surface, and may be attached to the wall surface. Each of the receiving apparatuses 201 to 209 uses the receiving apparatus 102 shown in FIG. Each of these receiving apparatuses 201 to 209 constitutes an SDI converter that receives a transmission radio wave (transmission information).

  In this studio wireless photographing system 200, when a wireless reception processing system in which three receivers 201 to 203 and the like are cascade-connected is one system, n = 3 wireless reception processing systems I to III are configured. In this example, the receiving apparatuses 201 to 203 configure a first-system wireless reception processing system I as shown in FIG. The first-stage receiver 201 and the next-stage receiver 202 are cascade-connected through the coaxial cable 21. The receiving device 202 and the receiving device 203 at the final stage of this system are cascade-connected through the coaxial cable 22. The receiving device 203 and the signal processing device 6 in the master room 60 are connected by wiring through the coaxial cable 23.

  The receiving devices 204 to 206 constitute a second-system wireless reception processing system II. The first-stage receiver 204 and the next-stage receiver 205 are cascade-connected through the coaxial cable 24. The receiving device 205 and the receiving device 206 at the final stage of this system are cascade-connected through the coaxial cable 25. The receiving device 206 and the signal processing device 6 in the master room 60 are connected by wiring through the coaxial cable 26.

  Furthermore, the receiving devices 207 to 209 constitute a third-system wireless reception processing system III. The first-stage receiving device 207 and the next-stage receiving device 208 are cascade-connected through the coaxial cable 27. The receiving device 208 and the receiving device 209 in the final stage of this system are cascade-connected through the coaxial cable 25. The receiving device 209 and the signal processing device 6 in the master room 60 are connected by wiring through the coaxial cable 29.

  The signal processing device 6 provided in the master room 60 has the best quality among the three transmission data DOUT determined to be optimum output from the first to third wireless reception processing systems I to III. It has a function of selecting received data DIN0 or DIN1. As the signal processing device 6, a personal computer or a video server that can edit a video signal is used.

  FIG. 8 is a conceptual diagram showing an example of simultaneous reception (part 1) in the studio wireless photographing system 200. In this example, only the first-system wireless reception processing system I when there is no shielding object is extracted and shown. The same can be said for the other second and third wireless reception processing systems II and III, and the description thereof will be omitted.

  In the radio reception processing system I shown in FIG. 8, transmission radio waves radiated from the television camera 40 through the antenna 8 are simultaneously received by the three receiving apparatuses 201 to 203 when there is no shielding object within the line-of-sight range. Among the receiving apparatuses 201 to 203, the highest quality received signal is transferred to the master room 60.

  FIG. 9 is a conceptual diagram illustrating an example of simultaneous reception (part 2) in the studio wireless photographing system 200. In this example, only the first-system wireless reception processing system I when the shielding object 5 is present is extracted and shown. The same can be said for the other second and third wireless reception processing systems II and III, and the description thereof will be omitted.

  According to the wireless reception processing system I shown in FIG. 9, it is a case where the television camera 40 is moved to a position directly below the receiving device 202 attached, and the receiving devices 201 to 203 are seen from the antenna 8. For example, there is a case where the shielding object 5 exists between the antenna 8 and the receiving device 201. In this case, the transmitted radio wave (transmission information) with the least error and the best signal quality radiated through the antenna 8 of the TV camera 40 is optimally received by the receiving device 202 existing within the line-of-sight range.

  In the receiving apparatus 201, since the shielding object 5 exists between the antenna 8 and the receiving apparatus 201, there are many errors, and transmission radio waves with poor signal quality are received. In the receiving device 203, the shielding object 5 does not exist between the antenna 8 and the receiving device 201. However, since the line-of-sight distance is long, a transmission radio wave having a signal quality inferior to that of the receiving device 202 is received.

  In the receiving device 202, the received data DIN0 based on the transmitted radio wave with few errors received by the device itself is compared with the received data DIN1 based on the transmitted radio wave received from the receiving device 201 with many errors. Since the receiving device 202 selects the former, the receiving device DIN0 with the fewest errors received by the device itself and having the best signal quality is output to the receiving device 203 at the next stage.

  Under such wireless reception processing conditions, the receiving device 203 having the signal comparison and transmission function as described in the first embodiment has the least error and the best signal quality transmitted from the TV camera 40. The reception data DIN0 received by the receiving device 202 is extracted, and this reception data DIN0 is transferred to the master room 60 as the highest quality transmission data DOUT.

FIG. 10 is a conceptual diagram showing a simultaneous reception example (part 3) in the studio wireless photographing system 200. FIG. 11 is a conceptual diagram illustrating an example of simultaneous reception when the television camera is retracted.
In this example, only the first-system radio reception processing system I when the shield 5 is present and the TV camera is retracted is shown. The same can be said for the other second and third wireless reception processing systems II and III, and the description thereof will be omitted.

  According to the studio wireless photographing system 200 shown in FIG. 10, it is a case where the television camera 40 is retracted from the position directly below the receiving device 202 to the right back direction of the studio, and is received from the antenna 8. When the devices 201 to 203 are viewed, for example, the positional relationship in which the shielding object 5 exists between the antenna 8 and the receiving device 202, and the receiving device 201 has a better view.

  In this case, the transmission radio wave (transmission information) radiated through the antenna 8 of the television camera 40 shown in FIG. 11 with few errors is optimally received by the receiving device 201 existing within the line-of-sight range.

  In the receiving device 202, since the shielding object 5 exists between the antenna 8 and the receiving device 201, a transmission radio wave with many errors is received. In the receiving device 203, not only the shielding object 5 exists between the antenna 8 and the receiving device 201 but also the line-of-sight distance is long, so that a transmission radio wave having a lower signal quality than the receiving device 202 is received. .

  In the receiving apparatus 201, the reception data DIN 0 based on the transmitted radio wave having the best signal quality with few errors received by the apparatus itself is transmitted to the receiving apparatus 202. The receiving apparatus 202 compares the received data DIN0 received from the receiving apparatus 201 with the received data DIN0 based on the transmitted radio wave having many signal errors and having poor signal quality. Since the latter is selected in the receiving apparatus 202, relaying (continuing transmission) is performed so that the reception data DIN1 with the fewest errors received by the receiving apparatus 201 and having the best signal quality is output to the receiving apparatus 203 in the next stage.

  Under such wireless reception processing conditions, the receiving device 203 having the signal comparison and transmission function as described in the first embodiment has received data DIN0 based on transmission radio waves with many errors received by the device itself, and the receiving device. The received data DIN1 received from 202 is compared. The receiving device 203 selects the latter. As a result, the reception data DIN1 received by the receiving device 201 based on the transmission radio wave radiated from the TV camera 40 and with few errors is extracted, and this reception data DIN1 is transferred to the master room 60 as the highest quality transmission data DOUT. To be made.

  As described above, according to the studio wireless photographing system 200 according to the second embodiment, the information transmission / reception processing system described in the first embodiment is applied. Even when the number of devices is increased, the number of wires such as communication cables can be reduced. Further, as shown in FIGS. 9 to 11, the optimum transmission data DOUT can be transferred to the master room 60 even when the shielding object 5 exists in the line-of-sight range.

  In this example, the studio wireless photographing system 200 has been described with respect to the information transmission / reception processing system, but the present invention is not limited to this and may be applied to a stage wireless photographing system. In the stage wireless photographing system, a subject is photographed by a wireless photographing device at a theater stage, transmission information (wireless radio waves) is received by a plurality of receiving devices, and a photographing signal is transferred from the receiving device to a master room or the like. The

FIG. 12 is a block diagram illustrating a configuration example of an information transmission / reception processing system 300 according to the third embodiment.
In this embodiment, the nine receiving devices 301 to 309 as described in the second embodiment are all connected in cascade. When the system 300 is configured in this way, it is possible to wire a single communication cable.

  An information transmission / reception processing system 300 illustrated in FIG. 12 includes a transmission device 4, nine reception devices 301 to 309, and one signal processing device 61. In this example, the receiving device 301 and the receiving device 302 at the next stage are connected by the coaxial cable 31. The receiving device 302 and the next receiving device 303 are connected by the coaxial cable 32. The receiving device 303 and the next receiving device 304 are connected by the coaxial cable 33. The receiving device 304 and the next receiving device 305 are connected by the coaxial cable 34. The receiving device 305 and the receiving device 306 at the next stage are connected by the coaxial cable 35.

  In addition, the receiving device 306 and the receiving device 307 at the next stage are connected by a coaxial cable 36. The reception device 307 and the next-stage reception device 308 are connected by a coaxial cable 37. The receiving device 308 and the next receiving device 309 are connected by a coaxial cable 38. The final-stage receiving device 309 and the signal processing device 61 are connected by a coaxial cable 39.

  Compared with the signal processing device 6 described in the second embodiment, the signal processing device 61 in this example is based on a single transmission data DOUT determined to be optimum output from a single wireless reception processing system. As in the second embodiment, the function of selecting the highest quality received data DIN0 or DIN1 from the three systems can be omitted. The nine receiving devices 301 to 309 use the receiving device 102 as shown in FIG.

  In addition, regarding the capacity of the memory M1 in each of the receiving apparatuses 301 to 309, a memory having the following relationship is prepared. Based on the case where the memory M1 of the receiving device 301 stores data for T1 seconds, the receiving device 302 has a memory capacity of 2 × T seconds, and the receiving device 303 has 3 × T seconds in the same manner. The receiving device 304 is 4 × T seconds, the receiving device 305 is 5 × T seconds, the receiving device 306 is 6 × T seconds, the receiving device 307 is 7 × T seconds, and the receiving device 308 is 8 × T seconds. In the receiving device 309, a memory capacity of 9 × T seconds is prepared.

  As described above, according to the studio wireless photographing system 300 according to the third embodiment, the information transmission / reception processing system described in the first embodiment is applied, and therefore, when nine receivers 301 to 309 are used. However, it is possible to construct a single radio reception processing system by cascading the receiving apparatuses, and to reduce the number of communication cables to one. Although not shown, even when there is a shielding object in the line-of-sight range, optimum transmission data DOUT can be transferred to the signal processing device 61 in the same manner as in the first and second embodiments. .

FIG. 13 is a block diagram illustrating a configuration example of an information transmission / reception processing system 400 as the fourth embodiment.
In this embodiment, nine receiving devices 301 to 309 as described in the second embodiment are branched into three systems, and the internal structure of the receiving devices 406 and 409 close to the signal processing device 61 is devised to be coaxial. An information transmission / reception processing system 400 in which cables are wired in a resin shape is configured.

  In this example, the reception data DIN0 related to the transmission information received by the reception device 406, one or more, that is, the reception data DIN1 sent from the reception device 403 in the previous stage and the reception data sent from the reception device 405 DIN2 is compared, and a signal comparison / selection process is performed such that the received data having the better signal quality is selected based on the comparison result and transferred to the receiving device 409 at the subsequent stage.

  A studio wireless photographing system 400 shown in FIG. 13 includes a transmission device 4, nine reception devices 401 to 409, and one signal processing device 61. In this system 400, when the wireless reception processing system in which the three reception devices 401 to 403 are cascade-connected is one system, n = 3 wireless reception processing systems I to III are configured.

  In this example, the receiving apparatuses 401 to 403 constitute a first system radio reception processing system I as shown in FIG. The first-stage receiver 401 and the next-stage receiver 402 are cascade-connected through the coaxial cable 41. The receiving device 402 and the receiving device 403 at the final stage of this system are cascade-connected through the coaxial cable 42.

  In addition, the receiving devices 404 to 406 constitute a second-system wireless reception processing system II. The first-stage receiver 404 and the next-stage receiver 405 are cascade-connected through the coaxial cable 44. The receiving device 405 and the receiving device 406 at the final stage of this system are cascade-connected through the coaxial cable 45. The receiving device 406 and the above-described receiving device 403 are connected by wiring through the coaxial cable 43.

  Furthermore, the receiving devices 407 to 409 constitute a third-system wireless reception processing system III. The first-stage receiving device 407 and the next-stage receiving device 408 are cascade-connected through the coaxial cable 47. The receiving device 408 and the receiving device 409 at the final stage of this system are cascade-connected through the coaxial cable 45. The receiving device 409 and the above-described receiving device 406 are connected by wiring through the coaxial cable 46, and the receiving device 409 and the signal processing device 61 in the master room 60 are connected by wiring through the coaxial cable 49.

  The signal processing device 61 provided in the master room 60 performs signal processing based on transmission data DOUT determined to be optimum output from the receiving device 409. As the signal processing device 61, a personal computer or a video server capable of editing a video signal is used. As in the second embodiment, the signal processing device 61 can omit the function of selecting the reception data DIN0 or DIN1 with the highest quality from the three systems. For the seven receiving apparatuses 401 to 405, 407, and 408, the receiving apparatus 102 as shown in FIG. 2 is used as it is. As the receiving devices 406 and 409, those having the configuration shown in FIG. 14 are used.

FIG. 14 is a block diagram illustrating an internal configuration example of the reception device 406. Since the receiving apparatus 409 has the same configuration, the description thereof is omitted.
14 includes data input terminals 11 and 51, signal reception units 12 and 52, antenna 13, radio wave reception unit 14, synchronization detection unit 55, memories M1, M2, and M3, data output terminal 19, and signal comparison. Delivery means 70 is provided. A radio wave receiver 14 is connected to the antenna 13. The radio wave receiver 14 receives a radio wave signal (transmission information) from the transmission device 4 through the antenna 13.

  When receiving the radio signal, the radio wave receiver 14 demodulates the radio signal. The demodulated received data DIN0 ′, that is, the transmission information transmitted from the transmission device 4, includes a synchronization signal Sync for synchronizing the data signal (DATA) transmitted from the transmission device 4, and a data signal ( DATA). The radio wave receiver 14 measures a bit error rate (BER) indicating how much the data obtained when demodulating the radio wave signal is incorrect, and generates a quality signal Sq indicating the quality of the data.

  The radio wave receiver 14 generates data DIN0 in which the quality signal Sq measured at the time of demodulation is inserted into all the received data DIN0 'received from the transmitter 4, and transfers the data DIN0 to the memory M1. A memory M1 is connected to the radio wave receiver 14, and the reception data DIN0 output from the radio wave receiver 14 is held. For the memory M1, a RAM or SDRAM is used. The radio wave receiver 14 outputs the quality signal Sq measured when demodulating the data to the quality determiner 16. Further, the radio wave receiver 14 extracts the synchronization signal Sync and outputs it to the synchronization detector 55.

  On the other hand, the signal receiving unit 12 is connected to the data input terminal 11 described above, and, for example, the reception data DIN1 transmitted from the first-system receiving device 403 is received through the data input terminal 11. The signal receiver 12 receives the received data DIN1. The received data DIN1 includes a synchronization signal Sync ′ for synchronizing the data signal (DATA) sent from the preceding receiving device 403, a quality signal Sq ′ representing the quality of the data, and a data signal (DATA ′). )It is included.

  The signal receiving unit 12 transfers all of the received data DIN1 received from the preceding receiving device 403 to the memory M2. A memory M2 is connected to the signal receiving unit 12, and the received data DIN1 output from the signal receiving unit 12 is held. For the memory M2, RAM or SDRAM is used. Further, the signal receiving unit 12 extracts the quality signal Sq ′ from the reception data DIN <b> 1 and outputs it to the quality determination unit 56. Further, the signal receiving unit 12 extracts the synchronization signal Sync ′ and outputs it to the synchronization detection unit 55.

  Further, the signal receiving unit 52 is connected to the data input terminal 51, and for example, the reception data DIN 2 transmitted from the second-system receiving device 405 is received through the data input terminal 51. The signal receiver 52 receives the received data DIN2. The received data DIN2 includes a synchronization signal Sync ″ for synchronizing the data signal (DATA) sent from the receiving device 405, a quality signal Sq ″ indicating the quality of the data, and a data signal (DATA ′). ')It is included.

  The signal receiving unit 52 transfers all the received data DIN2 received from the receiving device 405 to the memory M3. A memory M3 is connected to the signal receiving unit 52, and the reception data DIN2 output from the signal receiving unit 52 is held. For the memory M3, RAM or SDRAM is used. Further, the signal reception unit 52 extracts the quality signal Sq ″ from the reception data DIN2 and outputs the quality signal Sq ″ to the quality determination unit 56. Further, the signal reception unit 52 extracts the synchronization signal Sync ″ and outputs it to the synchronization detection unit 55.

  The above-mentioned memories M1, M2 and M3 are connected to the synchronization detection unit 55, from which the synchronization signal Sync output from the radio wave reception unit 14, the synchronization signal Sync 'output from the signal reception unit 12, and the signal reception unit 52 A time lag with respect to the output sync signal Sync ″ is detected, and a new sync signal Sync is generated. The received data DIN0 read from the memory M1, the received data DIN1 read from the memory M2, and the received read from the memory M3. The output timing of each data DIN2 is controlled. The synchronization detection unit 55 outputs the newly generated synchronization signal Sync to the quality determination unit 56 and controls the determination timing.

  In addition to the synchronization detector 55, signal comparison / selection means 70 is connected to the memories M1, M2 and M3, and the quality signal Sq output from the memory M1 and the reception device 403 output from the memory M2 are sent. The quality signal Sq ′ is compared with the quality signal Sq ″ sent from the receiving device 405 output from the memory M3, and the received data DIN0, DIN1 or DIN2 having the better signal quality is selected. The

  The signal comparison / selection means 70 includes a quality determination unit 56, a data selection unit 57, and a signal transmission unit 18. In the quality determination unit 56, the quality signal Sq read from the memory M1, the quality signal Sq ′ sent from the receiving device 403 read from the memory M2, and the quality signal sent from the receiving device 405 read from the memory M3. The quality is determined by comparing Sq ″ with the timing of the newly generated synchronization signal Sync. Based on the comparison determination result, the quality determination unit 56 generates a data selection signal Sc ′.

  For the quality determination unit 56, a determination unit including a CPU and an MPU is used. The quality determination unit 56 outputs the data selection signal Sc ′ to the data selection unit 57, selects this data selection so as to select the reception data DIN0, DIN1 or DIN2 with the better quality and send it to the signal transmission unit 18. The unit 57 is controlled.

  The data selection unit 57 and the signal transmission unit 18 described above constitute a repeater. The data selection unit 57 selects one of the reception data DIN0, DIN1, and DIN2 having the better signal quality based on the data selection signal Sc ′ output from the quality determination unit 56. The data transmission unit 18 is connected to the data selection unit 57, and the selected reception data DIN0, DIN1, or DIN2 is transferred as transmission data DOUT to the subsequent receiving device 409 or the like through the data output terminal 19.

  15A to 15D are diagrams showing examples of formats (structures) of received data DIN0, DIN1, DIN2 and transmission data DOUT. Received data DIN0 shown in FIG. 15A is demodulated reception information output from radio wave receiver 14. The reception data DIN0 includes a synchronization signal Sync for synchronizing the data signal (DATA) sent from the transmission device 4, a quality signal Sq indicating the quality of the data, and a data signal (DATA). . These three signals are regularly arranged at regular intervals. For example, the reception data DIN0 is composed of Sync2 + Sq2 + DATA2,..., Sync256 + Sq256 + DATA256 following Sync1 + Sq1 + DATA1.

  Received data DIN1 shown in FIG. 15B is a signal input to the signal receiving unit 12 from the first-system receiving device 403. From the viewpoint of the reception device 403, the transmission data DOUT is output from the signal transmission unit 18 to the reception device 406. The received data DIN1 includes a synchronization signal Sync ′ for synchronizing the data signal (DATA ′) sent from the receiving device 403, a quality signal Sq ′ representing the quality of the data, and a data signal (DATA ′). include. These three signals are regularly arranged at regular intervals. For example, the received data DIN1 is made up of Sync1 '+ Sq1' + DATA1 ', followed by Sync2' + Sq2 '+ DATA2', ..., Sync256 '+ Sq256' + DATA256 '.

  The reception data DIN2 illustrated in FIG. 15C is a signal input from the second system reception device 405 to the signal reception unit 52. From the viewpoint of the reception device 405, the transmission data DOUT is output from the signal transmission unit 18 to the reception device 406. The received data DIN2 includes a synchronization signal Sync ″ for synchronizing the data signal (DATA ″) sent from the receiving device 405, a quality signal Sq ″ indicating the quality of the data, and a data signal (DATA '')It is included. These three signals are regularly arranged at regular intervals. For example, the reception data DIN2 is composed of Sync1 "+ Sq1" + DATA1 ", followed by Sync2" + Sq2 "+ DATA2", ..., Sync256 "+ Sq256" + DATA256 ".

  The transmission data DOUT shown in FIG. 15D is a signal output from the signal transmission 18 to the next receiving device 409 and the like. When viewed from the receiving device 406 at the subsequent stage, the received data DIN1 is input to the signal receiving unit 12. The transmission data DOUT includes a synchronization signal Sync for synchronizing the data signal (DATA) to be transferred to the next receiving device 409, a quality signal Sq indicating the quality of the data, and a data signal (DATA). . These three signals are regularly arranged at regular intervals. For example, when the received signal with good quality is the received data DIN0 received by the receiving device 406, the transmission data DOUT composed of Sync2 + Sq2 + DATA2,... It is sent to the receiving device 409. Since the receiving device 409 has the same configuration as that of the receiving device 406, the above-described functions are exhibited.

  As described above, when the receiving device 406 and the like are configured, the received data DIN1 and DIN2 received from the two systems of receiving devices 403 and 405 and the received data with the best signal quality among the received data DIN0 received by the device itself are obtained. Can be extracted. As a result, only high-quality received data can be selected and sent to the receiving device 409 at the subsequent stage. The receiving device 409 outputs only high-quality received data to the subsequent signal processing device 61.

  Moreover, even when the space between the transmission device 4 and, for example, the reception device 401 is shielded, the other reception devices 402 to 409 transfer transmission information optimally received from the transmission device 4 to the signal processing device 61. Therefore, the signal processing device 61 can perform signal processing so that the received data is not interrupted. Therefore, the receiving devices 401 to 409 and the like can be sufficiently applied to a studio radio imaging system of a broadcasting station.

  This invention shoots a subject with a wireless camera at a theater stage, a broadcasting station studio, etc., receives transmission information (wireless radio waves) with a plurality of receiving devices, and sends a shooting signal to the master room from the receiving devices. The present invention is extremely suitable when applied to a studio wireless photographing system that transfers data.

1 is a block diagram showing a configuration example of an information transmission / reception processing system 100 as a first embodiment according to the present invention. It is a block diagram which shows the example of internal structures of the receiver 102 grade | etc.,. (A)-(C) is a figure which shows the example of a format of reception data DIN0, DIN1, and transmission data DOUT. (A)-(D) are time charts which show the data comparison selection process example in the information transmission / reception processing system 100. FIG. (A)-(C) is a conceptual diagram which shows the example of a data storage in each memory M1, M2 of the three receivers 101-103. It is a conceptual diagram which shows the structural example of the studio radio | wireless imaging system 200 as a 2nd Example which concerns on this invention. 2 is a block diagram illustrating a configuration example of a studio wireless photographing system 200. FIG. It is a conceptual diagram which shows the example (the 1) of simultaneous reception in the studio radio | wireless imaging system 200. It is a conceptual diagram which shows the example (the 2) of simultaneous reception in the studio radio | wireless imaging system 200. It is a conceptual diagram which shows the example (the 3) of simultaneous reception in the studio radio | wireless imaging system. It is a conceptual diagram which shows the example of simultaneous reception at the time of television camera retreat. It is a block diagram which shows the structural example of the information transmission / reception processing system 300 which concerns on a 3rd Example. It is a block diagram which shows the structural example of the information transmission / reception processing system 400 as a 4th Example. 3 is a block diagram illustrating an internal configuration example of a reception device 406. FIG. A to D are diagrams showing format examples of received data DIN0, DIN1, DIN2 and transmission data DOUT. It is a block diagram which shows the structural example of the 1st radio | wireless transmission / reception system 10 which concerns on a prior art example. It is a block diagram which shows the structural example of the 2nd radio | wireless transmission / reception system 80 which concerns on a prior art example.

Explanation of symbols

4 ... Transmission device 6,61 ... Signal processing device 20,70 ... Signal comparison and transmission means 12 ... Signal reception unit 14 ... Radio wave reception unit (reception means) 15, 55... Synchronization detection unit, 16, 56... Quality judgment unit (determination unit), 17, 57... Data selection unit (relay unit), 18. 29, 31-39, 40, 40a, 40b... TV camera (transmitting device) with wireless transmission function, 41-49... Coaxial cable, 100, 300, 400. 103, 201-209, 301-309, 401-409 ... receiving device, 200, 500 ... studio wireless photographing system

Claims (4)

A transmission device that wirelessly transmits transmission information that is moved in the wireless reception area;
A plurality of receiving devices that simultaneously receive transmission information transmitted from the transmitting device;
A signal processing device that performs signal processing based on a received signal transmitted from the receiving device,
The receiving device is:
Receiving means for receiving the transmission information and outputting a reception signal;
A memory for holding a received signal output from the receiving means;
The reception signal held in the memory and the reception signal sent from the reception device in the previous stage, the synchronization signal attached to the reception signal held in the memory and the reception signal sent from the reception device in the previous stage Comparing based on the time lag with the synchronization signal attached to the signal , having a signal comparison and selection means for selecting the received signal with the better signal quality and transferring it to the subsequent receiving device,
An information transmission / reception processing system that is arranged in advance in a wireless reception area and in which the receiving apparatuses are cascade-connected. When a single radio reception processing system in which a plurality of the receiving devices are cascade-connected,
The information transmission / reception processing system according to claim 1, wherein n systems of the wireless reception processing system are provided. Receiving means for receiving transmission information wirelessly transmitted from a transmission apparatus that is operated to move in a wireless reception area and outputting a reception signal;
A memory for holding a received signal output from the receiving means;
The reception signal held in the memory and the reception signal sent from the reception device in the previous stage, the synchronization signal attached to the reception signal held in the memory and the reception signal sent from the reception device in the previous stage A receiving apparatus comprising: a signal comparing and selecting unit that compares based on a time lag with a synchronization signal attached to a signal, selects a received signal having a better signal quality, and transfers the selected signal to a subsequent receiving apparatus. Arranging a plurality of receiving devices in the wireless reception area in advance and cascading the receiving devices;
A process of acquiring transmission information by moving a transmission device within the wireless reception area, and transmitting transmission information from the transmission device to the reception device;
A step of receiving transmission information transmitted from the transmission device by the reception device and outputting a reception signal;
A step of holding a received signal output from the receiving device;
The held received signal and the received signal sent from one or more preceding receiving devices are sent from the synchronization signal attached to the held receiving signal and the one or more preceding receiving devices. An information transmission / reception processing method comprising: comparing a received signal with a synchronization signal attached to a received signal based on a time lag, selecting a received signal having a better signal quality, and transferring the selected signal to a subsequent receiving device .

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