JP2010011298A - Transmitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmitter that multiplexes a plurality of broadcast sources including broadcast sources inputted through a network for transmission. <P>SOLUTION: TC102 includes a file receiving portion 23 having a receiving network I/F portion 231, a TS packet conversion portion 22, a video image coding portion 21, a TS multiplexing portion 24, a modulating portion 25 and transmission control portion 26. The video image coding portion 21 codes a video image signal inputted from a camera a401 to output TS signals. The file receiving portion 23 receives file data via a network a422 through the receiving network I/F portion 231. TS packet conversion portion 22 converts the file data into a TS packet to output TS signals. TS multiplexing portion 24 multiplexes TS signals inputted from the video image coding portion 21 and TS packet conversion portion 22. The modulating portion 25 modulates the inputted TS signals which are output to TH404 corresponding to a radio frequency transmitter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transmission apparatus including a transmission-side apparatus that digitally modulates a TS signal and transmits the TS signal.

  Conventionally, broadcasting materials such as videos taken at a news gathering site and the like, and news gathering originals created in connection with the videos have been transmitted to broadcasting stations. These broadcast materials passed through various transmission paths for each broadcast material. FIG. 8 is a block diagram showing a system configuration of a conventional transmission system Z. As shown in FIG. With reference to FIG. 8, the transmission path | route of the broadcast material in the conventional transmission system Z is demonstrated.

  First, a video signal photographed by the camera a 401 is input to a TC 403 that is a transmission control device via a video switch 402. The video signal input to the TC 403 is converted into an MPEG-TS (Moving Picture Experts Group-Transport Stream) signal and then digitally modulated into a QAM (Quadrature Amplitude Modulation) signal, an OFDM (Orthogonal Frequency Division Multiplexing) signal, or the like. As an IF (Intermediate Frequency) signal, the signal is input to TH 404 which is a high-frequency transmission device. The IF signal input to TH 404 is converted into a high-frequency RF (Radio Frequency) signal and radiated as a radio wave from a transmitting parabolic antenna 405 provided in TH 404.

  Second, a video signal photographed by the camera b411 is stored as video data in a media 413 such as a DVD (Digital Versatile Disc) by a VTRa 412 which is a video recording device. The video data stored in the medium 413 is played back by the VTRb 414 which is a video playback device. The reproduced video signal is input to the TC 403 via the video switch 402. At this time, the connection of the video switch 402 is switched so that the video signal of the VTRb 414 is input to the TC 403 instead of the video signal of the camera a 401. The video signal input to the TC 403 is subjected to predetermined processing in the same manner as the video signal shot by the camera a 401 and is radiated as a radio wave from the transmission parabolic antenna 405 provided in the TH 404.

  The radio wave radiated from the transmitting parabolic antenna 405 reaches the receiving parabolic antenna 406 included in the RH 407 that is a high-frequency receiving device via the antenna W. The radio wave reaching the receiving parabolic antenna 406 is input to the RH 407 as an RF signal, and is converted into an IF signal by the RH 407. The IF signal is demodulated by the RC 408 serving as a reception control device in accordance with the modulation method, converted into an MPEG-TS signal, and decompressed to become the original video signal. The RC 408 passes the video signal to the video server 409. Through the above processing, the video server 409 saves the video signal captured by the camera a 401 and the video signal captured by the camera b 411 as video data.

  Thirdly, a video signal photographed by the camera c421 is stored as video data in the PCa 423 which is a personal computer via the network a422. The video signal stored in the PCa 423 is transferred to a personal computer PCb 425 via a WAN (Wide Area Communication Network) 424 as necessary, and stored in the PCb 425 as video data.

  Fourthly, the news gathering document 431 is transmitted from the FAX a 432 on the transmission side, which is a facsimile, to the FAX b 434 on the reception side, which is a facsimile, via a PSTN (Public Switched Telephone Network) 433, and the news gathering document 435 is printed on the FAX b 434. The news gathering document 431 is created in association with the video imaged by the camera b411. The coverage document 431 may be created by the PCa 423, and in that case, the coverage document 431 is transferred to the PCb 425 through the WAN 424 and stored as document data in the PCb 425.

In addition, a technique is known in which a plurality of types of video signals are received, multiplexed, and transmitted (see Patent Document 1). In this technique, one or a plurality of video signals wirelessly transmitted from an FPU (Field Pickup Unit) device, an antenna of a relay vehicle, an antenna of another base station, or the like is received by a receiving device included in the base station device. Whether or not the received video signal is multiplexed and transmitted by the switching unit is selected. When a plurality of video signals are selected by the switching unit, the video signals are multiplexed by the multiplexing unit. One or multiplexed video signal is wirelessly transmitted from the antenna of the transmission device to another base.
JP 2007-060031 A

  In the prior art, in order to transmit the video data stored in the medium 413, the input of the video switch 402 must be switched to interrupt the transmission of the video captured by the camera a401. Further, since transmission of video data stored in the medium 413 is performed while being played back by the VTRb 414, it takes at least the playback time of the video data for transmission. Furthermore, since the video data stored in the medium 413 is decoded and transmitted to the original video signal, it is affected by the transmission rate of the TC 403. Therefore, depending on the transmission rate of the TC 403, the video data is stored in the video server 409 in a state of being deteriorated from the video quality when stored in the medium 413.

  Further, in order to transmit the video signal photographed by the camera c421 and the coverage document, it is necessary to prepare a transmission path different from the transmission apparatus, and management and cost of the communication apparatus are useless. Further, the news gathering document 431 is created based on the video shot by the camera b411, and is transmitted through a different path from the video of the camera b411, although it is a broadcast material related to the video of the camera b411. Therefore, it is difficult to manage related broadcast materials.

  On the other hand, the technique of Patent Document 1 is a technique in which a plurality of video signals transmitted by radio waves are multiplexed and transmitted by a base station device, and does not show how to handle broadcast material before being transmitted by radio waves.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a transmission apparatus that multiplexes and transmits a plurality of types of broadcast materials including broadcast materials input via a network.

  The transmission apparatus according to the present invention is a transmission apparatus including a transmission-side apparatus that digitally modulates a TS signal and transmits the TS signal. The transmission-side apparatus converts a file data input via a network into a TS packet. It comprises a packet converter, and a TS multiplexer for multiplexing the TS signal input from the TS packet converter and other TS signals.

  Since the transmission apparatus of the present invention multiplexes and transmits a plurality of types of broadcast material including broadcast material input via a network, the transmission path can be simplified and the broadcast material can be easily managed on the receiving side. In addition, since the transmission apparatus of the present invention converts data input via the network into TS packets and transmits the data by the transmission apparatus, various data other than video can be transmitted, and the added value as the transmission apparatus increases.

  A system configuration of the transmission apparatus X of the present embodiment will be described. FIG. 1 is a block diagram showing a system configuration of the transmission apparatus X of the present embodiment. FIG. 2 is a functional block diagram showing the configuration of the TC 102. FIG. 3 is a functional block diagram showing the configuration of the RC 104. In FIG. 1, the same components as those in FIG.

  First, referring to FIG. 1, the configuration on the transmission side includes a camera a 401, a camera b 411, a camera c 421, a video recording device VTRa 412, a network a 422, a personal computer PCa 423, a scanner 103, It consists of TC102 which is a transmission control device and TH404 which is a high frequency transmission device. The TH 404 includes a transmission parabolic antenna 405.

  The camera a 401 is for main video shooting, and inputs the shot video signal directly to the TC 102.

  The camera b411 is for coverage shooting, and stores the captured video signal as video data in the media 413 via the VTRa412.

  The camera c421 is a network camera for auxiliary photographing, and transmits a photographed video signal as video data to the TC 102 via the network a422.

  The PCa 423 is a personal computer, reads the video data stored in the medium 413, and transmits the read video data to the TC 102 via the network a422.

  The PCa 423 is connected to the scanner 103, and reads the coverage document 431 through the scanner 103. The PCa 423 transmits the read document data to the TC 102 via the network a422. The PCa 423 may create the coverage document 431 without acquiring it from the scanner 103 and transmit it to the TC 102 via the network a422. Hereinafter, the news gathering original 431 read by the PCa 423 via the scanner 103 or the news gathering original created by the PCa 423 is collectively referred to as original data.

  In this way, the TC 102 receives a plurality of broadcast materials including a main video shot by the camera a 401, a coverage video shot by the camera b 411, a network video shot by the camera c 421, and document data. . Hereinafter, the broadcast material received by the TC 102 via the network a422 is referred to as file data. The file data is video data, audio data, image data, document data, or the like, and any data format can be used as long as it can be transmitted over a network.

  Next, the function of the TC 102 will be described with reference to FIG. The TC 102 includes a file reception unit 23 having a reception network I / F unit 231, a TS packet conversion unit 22, a video encoding unit 21, a TS multiplexing unit 24, a modulation unit 25, and a transmission control unit 26. It has. The transmission control unit 26 stores the file reception unit 23 having the reception network I / F unit 231, the TS packet conversion unit 22, the video encoding unit 21, the TS multiplexing unit 24, and the modulation unit 25 in a memory (not shown). This is an arithmetic processing unit that performs integrated control according to the programmed program.

  The file receiving unit 23 receives file data from the PC a 423 via the network a 422 and the reception network I / F unit 231. The file receiving unit 23 passes the received file data to the TS packet converting unit 22.

  At this time, the data received via the network needs to be guaranteed on the network. The reception network I / F unit 231 is implemented with a protocol for performing an acknowledgment with the PCa 423 via the network a422, details of which will be described later.

  When receiving the file data, the TS packet conversion unit 22 divides the file data so as to fit in the data part of the TS packet, and creates a TS packet to which a TS header is added. Further, when creating the TS packet, the TS packet conversion unit 22 adds a flag indicating that the data is file data via the network a422 to a predetermined position of the TS header or the file data. The TS packet conversion unit 22 passes a TS signal in which a plurality of TS packets are continuous to the TS multiplexing unit 24.

  The video encoding unit 21 generates a TS packet by encoding the video signal input from the camera a 401, and passes a TS signal in which a plurality of TS packets are continuous to the TS multiplexing unit 24.

  The TS multiplexing unit 24 multiplexes the TS signals input from the video encoding unit 21 and the TS packet conversion unit 22, and passes the multiplexed TS signal to the modulation unit 25. The TS multiplexing unit 24 has a buffer (not shown), stores TS packets in the buffer, and performs multiplexing processing by rearranging the stored TS packets. Hereinafter, this buffer is referred to as a transmission buffer. The TS multiplexing unit 24 has transmission rate information input in advance, and adjusts the amount of TS signal to be multiplexed according to the transmission rate.

  Note that the TS multiplexing unit 24 may pass one of the TS signals of the video encoding unit 21 and the TS packet conversion unit 22 to the modulation unit 25 without multiplexing. Further, the TS multiplexer 24 may multiplex TS signals input from the video encoder 21 and the TS packet converter 22 at a preset ratio. Thereby, the broadcast material can be transmitted with priority.

  The modulation unit 25 performs error correction code addition, energy spreading, interleaving, transmission frame formation, and the like on the multiplexed TS signal, and passes the IF signal digitally modulated into a QAM signal, an OFDM signal, or the like to the TH 404.

  Returning to FIG. 1, the TH 404 converts the IF signal input from the TC 102 into a high-frequency RF signal and radiates it as a radio wave from the transmitting parabolic antenna 405.

  Next, the configuration on the receiving side will be described. In FIG. 1, the configuration on the receiving side includes an RH 407 that is a high-frequency receiving device including a receiving parabolic antenna 406, an RC 104 that is a high-frequency receiving control device, a network b 410, a video server 409, and a PC 425 that is a personal computer. Consists of.

  The radio wave radiated from the transmitting parabolic antenna 405 reaches the receiving parabolic antenna 406 via the antenna W. When radio waves reach the receiving parabolic antenna 406, the RH 407 converts the high-frequency RF signal into an intermediate-frequency IF signal and passes it to the RC 104.

  The function of the RC 104 will be described with reference to FIG. The RC 104 includes a demodulation unit 81, a TS separation unit 82, a video decoding unit 83, a file data reconstruction unit 84, a file transmission unit 85 having a transmission network I / F unit 851, and a reception control unit 86. It has. The reception control unit 86 stores the demodulation unit 81, the TS separation unit 82, the video decoding unit 83, the file data reconstruction unit 84, and the file transmission unit 85 including the transmission network I / F unit 851 in a memory (not shown). This is an arithmetic processing unit that performs integrated control according to the programmed program.

  The demodulator 81 demodulates the IF signal passed from the RH 407 according to the modulation method, converts it to a TS signal, and passes it to the TS separator 82.

  The TS separation unit 82 checks whether the TS packet constituting the TS signal has a flag added by the TS packet conversion unit 22 and indicating file data via the network a422. The TS separation unit 82 passes the TS packet without the flag to the video decoding unit 83 and passes the TS packet with the flag to the file data reconstruction unit 84 according to the check result.

  Note that the TS separation unit may determine whether the TS packet data portion is in the PES (Packetized Elementally Stream) format, rather than determining the TS signal separation destination based on the presence or absence of a flag. This is because MPEG2 Systems stipulates that video / audio information is encoded in the PES format.

  The video decoding unit 83 decodes the original video signal from the TS signal and outputs the decoded video signal to the video server 409. The video server 409 stores the video signal input from the RC 104.

  The file data reconstruction unit 84 extracts the file data from the TS packet, reconstructs the original file data, and passes the reconstructed file data to the file transmission unit 85. Here, “reconstruction” means that all file data divided into a plurality of TS packets is received and the original file data is created. This is because when the file data exceeds the size of the fixed-size TS packet, it is divided into a plurality of TS packets and transmitted.

  The file transmission unit 85 transmits file data to the PCb 425 via the network b410 via the transmission network I / F unit 851. Note that the file transmission unit 85 implements a protocol for performing a confirmation response with the PCb 425 in order to guarantee data on the network, details of which will be described later.

  Returning to FIG. 1, if the received file data is video data, the PCb 425 transmits it to the video server 409 via the network b410, and if it is document data, the PCb 425 stores it in its storage device. The video server 409 stores the received video data. Needless to say, the file transmission unit 85 may distribute the file data to the video server 409 or the PCb 425 according to the type of the file data.

  Next, the protocol implementation of the file reception unit 23 of the TC 102 and the file transmission unit 85 of the RC 104 in the above process will be described. Transmission / reception of file data via the network needs to be guaranteed on the network. Normally, an acknowledgment is made between PCa 423 and PCb 425 that are end-to-end. However, since the transmission apparatus is a one-way communication from the transmission side to the reception side, the response of the PCb 425 cannot be transmitted to the PCa 423. Therefore, the confirmation response is performed between the PCa 423 and the TC 102, and between the RC 104 and the PCb 425.

  FIG. 4 is a schematic diagram showing a protocol conversion process for file data transmitted and received between the TC 102 and the RC 104 via the network. The reception network I / F unit 231 of the TC 102 and the transmission network I / F unit 851 of the RC 104 have hardware devices corresponding to a network interface such as Ethernet (registered trademark). Further, it is assumed that predetermined IP (Internet Protocol) addresses are allocated to the reception network I / F unit 231 and the transmission network I / F unit 851, respectively.

  First, protocol conversion processing between the PCa 423 and the TC 102 will be described. The reception network I / F unit 231 of the TC 102 conforms to a TCP (Transmission Control Protocol) / IP (Internet Protocol) hierarchical model. The TCP / IP hierarchical model includes a network interface layer, an Internet layer, a transport layer, and an application layer.

  The reception network I / F unit 231 receives a packet storing file data from the PCa 423 via the Ethernet (registered trademark) protocol which is a protocol of the network interface layer. The Ethernet (registered trademark) protocol confirms the Ethernet (registered trademark) header added to the packet, and passes the packet to IP which is a protocol of the upper Internet layer. The IP confirms the IP header added to the packet, and passes the packet to TCP, which is a protocol of the upper transport layer. The TCP confirms the TCP header added to the packet, and passes the file data to the upper application, that is, the file receiving unit 23.

  Through the above processing, the TC 102 receives file data from the PCa 423 via the network a422.

  When the file data is received, the file receiving unit 23 passes the received file data to the TS packet converting unit 22. As described above, the file data is converted into a TS signal, multiplexed, digitally modulated, and radiated as a radio wave from TH404.

  When the radio wave reaches RH407, it is digitally demodulated in accordance with the modulation method, separated into TS signals having file data, and reconfigured to become the original file data. Upon receiving the file data reconstructed by the file data reconstruction unit 84, the file transmission unit 85 transmits the file data to the PCb 425 via the transmission network I / F unit 851.

  Here, a protocol conversion process between the RC 104 and the PCb 425 for the RC 104 to transmit file data to the PCb 425 will be described. Similarly to the reception network I / F unit 231 of the TC 102, the transmission network I / F unit 851 of the RC 104 conforms to the TCP / IP hierarchical model.

  In the application layer of the transmission network I / F unit 851, the file data is transferred to the transport layer protocol TCP so as to be transmitted to the PCb 425. TCP creates a packet with a TCP header added to file data, and passes it to IP, which is an Internet layer protocol. The IP creates a packet with an IP header added to the passed packet and passes it to the Ethernet (registered trademark) protocol, which is a network interface layer protocol. The Ethernet (registered trademark) protocol creates a packet in which an Ethernet (registered trademark) header is added to the passed packet, and transmits the packet to the PC b 425 via a network b410 via a LAN (Local Area Network) or the like.

  Through the above processing, the RC 104 transmits file data to the PCb 425 via the network b410.

  Next, file data transmission processing will be described. FIG. 5 is a sequence diagram illustrating a file data transmission process.

  It is assumed that the video of the camera b411 is stored in advance in the medium 413, and the document data is stored in the PCa 423.

  First, the PCa 423 issues a network connection request to the file receiving unit 23 of the TC 102 (step a2) when the file transfer application is activated (step a1). In response to the network connection request, the file receiving unit 23 returns network connection establishment to the PCa 423 (step a3). When receiving the network connection establishment, the PCa 423 receives an instruction to start data transfer (step a4).

  The PCa 423 reads the video data from the medium 413 (step a5), and starts transferring the video data to the file receiving unit 23 via the network a422 (step a6).

  When receiving the video data via the network a422 as file data, the file receiving unit 23 passes the received file data to the TS packet converting unit 22 and issues a packet creation request (step a7).

  When receiving the packet creation request, the TS packet conversion unit 22 converts the passed file data into a TS packet, passes the TS signal to the TS multiplexing unit 24, and issues a TS signal multiplexing request (step a8).

  When receiving the TS signal multiplexing request, the TS multiplexing unit 24 multiplexes the TS signals and passes them to the modulation unit 25. At this time, although not shown, when the video signal from the camera a 401 in FIG. 1 is input, the TS multiplexing unit 24 multiplexes the TS signal composed of the camera a 401 and the TS signal composed of the video data. Become.

  The TS signal multiplexed in this way is digitally modulated by the modulator 25 and is emitted as a high frequency from TH 404 (not shown).

  When the PCa 423 finishes reading the video data from the medium 413, the PCa 423 notifies the file receiving unit 23 of the end of the video data transfer (step a9). The file receiving unit 23 receives the video data transfer end from the PC a 423 via the network a 422 via the reception network I / F unit 231. Upon receiving the video data transfer end, the file receiving unit 23 notifies the TS packet conversion unit 22 of the end of packet creation (step a10). The TS packet conversion unit 22 finishes creating the TS packet, and notifies the TS multiplexing unit 24 of the completion of packet multiplexing (step a11). When receiving the completion of packet multiplexing, the TS multiplexing unit 24 ends multiplexing of the TS signal.

  Next, when the PCa 423 finishes reading the video data from the medium 413, the PCa 423 starts reading the original data stored therein (step a12). The PCa 423 transmits the read document data to the file reception unit 23 of the TC 102 via the network a422 and notifies the start of document data transfer (step a13).

  The file receiving unit 23 receives the document data transmitted from the PC a 423 via the network a 422 via the receiving network I / F unit 231 as file data. When receiving the file data, the file receiving unit 23 passes the received file data to the TS packet converting unit 22 and issues a packet creation request (step a14).

  Upon receiving the packet creation request, the TS packet conversion unit 22 converts the passed file data into a TS packet, passes the TS signal to the TS multiplexing unit 24, and issues a TS packet packet multiplexing request (step a15). .

  When receiving the packet multiplexing request, the TS multiplexing unit 24 multiplexes the TS signals and passes them to the modulation unit 25. At this time, although not shown, when the video signal from the camera a 401 in FIG. 1 is input, the TS multiplexing unit 24 multiplexes the TS signal composed of the camera a 401 and the TS signal composed of document data. Become.

  The TS signal multiplexed in this way is digitally modulated by the modulator 25 and is emitted as a high frequency from TH 404 (not shown).

  When the reading of the document data is completed, the PCa 423 notifies the file receiving unit 23 of the completion of document data transfer via the network a422 (step a16). Further, the PCa 423 notifies the user by displaying, for example, the end of data transfer on a monitor (not shown) (step a17).

  The file receiving unit 23 receives the document data transfer end from the PC a 423 via the network a 422 via the reception network I / F unit 231. When receiving the completion of the document data transfer, the file reception unit 23 notifies the TS packet conversion unit 22 of the completion of packet creation (step a18). The TS packet conversion unit 22 finishes creating the TS packet and notifies the TS multiplexing unit 24 of the completion of packet multiplexing (step a19). The TS multiplexing unit 24 ends multiplexing of TS signals.

  Through the above processing, the transmission system X transmits the video data stored in the medium 413 and the document data stored in the PCa 423 via the network a422.

  Here, the flow control of the transmission buffer included in the TS multiplexing unit 24 will be described. The TS multiplexing unit 24 monitors the amount of data in the transmission buffer, and performs overflow control and underflow control in order to maintain a constant transmission rate. FIG. 6 is a sequence diagram showing the flow control of the TS multiplexing unit 24.

  When detecting that the transmission buffer overflows during the multiplexing process (Yes in step a81), the TS multiplexing unit 24 issues an overflow notification to the TS packet converting unit 22 (step a82). When receiving the notification of the overflow occurrence, the TS packet converting unit 22 issues a transfer interruption request to the file receiving unit 23 (step a83). Upon receiving the transfer interruption request, the file reception unit 23 issues a transfer interruption request to the PCa 423 via the network a422 via the reception network I / F unit 231 (step a84). Upon receiving the transfer interruption request, the PCa 423 interrupts the file data transfer. As a result, since no new TS signal is input, the TS multiplexing unit 24 can multiplex the TS packets stored in the transmission buffer and pass it to the modulation unit 25 without overflowing the transmission buffer.

  When the TS multiplexing unit 24 detects that an underflow of the transmission buffer occurs during the multiplexing process (Yes in step a85), the TS multiplexing unit 24 issues an underflow occurrence notification to the TS packet conversion unit 22 (step a86). When receiving the underflow occurrence notification, the TS packet converter 22 issues a transfer restart request to the file receiver 23 (step a87). Upon receiving the transfer resumption request, the file reception unit 23 issues a transfer resumption request to the PC a 423 via the network a422 via the reception network I / F unit 231 (step a88). Upon receiving the transfer restart request, the PCa 423 restarts the file data transfer (step a90).

Also, the TS packet conversion unit 22 issues a NULL packet multiplexing request to the TS multiplexing unit 24 (step a89). When receiving a NULL packet multiplexing request, the TS multiplexing unit 24 multiplexes NULL packets to stabilize the transmission rate at a constant level.

The file receiving unit 23 receives file data from the PC a 423 via the network a 422 via the reception network I / F unit 231. When receiving the file data, the file receiving unit 23 passes the file data to the TS packet conversion unit 22 and issues a packet creation restart request (step a91). When receiving the packet creation restart request, the TS packet conversion unit 22 converts the transferred file data into a TS packet, and passes the multiplexing restart request together with the TS signal to the TS multiplexing unit 24 (step a92). When receiving the multiplexing restart request, the TS multiplexing unit 24 stops multiplexing the NULL packet, which has been performed for underflow control of the transmission buffer, and resumes multiplexing of the input TS signal.

  With the above processing, the TS multiplexing unit 24 performs overflow control and underflow control according to the state of the transmission buffer, thereby adjusting the transmission buffer amount and stabilizing the transmission rate.

  Next, file data reception processing will be described. FIG. 7 is a sequence diagram showing a file data reception process.

  First, the PCb 425 issues a network connection request to the file transmission unit 85 of the RC 104 (step b2) when the file transfer application is activated (step b1). The file transmission unit 85 receives the network connection request and returns network connection establishment to the PCb 425 (step b3).

  A TS signal obtained by digitally demodulating radio waves received by the RH 407 (not shown) is input to the TS separator 82.

  The TS separation unit 82 passes a TS packet having a flag indicating file data from the TS signal to the file data reconstruction unit 84 and notifies the start of packet reception (step b4). The file data reconstruction unit 84 reconstructs the original file data from the passed TS packet, passes the file data to the file transmission unit 85, and transmits a reconstruction file data transmission request (step b5).

  Upon receiving the reconfiguration file data transmission request, the file transmission unit 85 starts file data transfer to the PCb 425 via the network b410 via the transmission network I / F unit 851 (step b6).

  When the PCb 425 receives the file data via the network b410, the PCb 425 checks the type of the file data.

  If the file data is video data (Yes in step b7), the PCb 425 displays a video data transfer start display on a monitor or the like (not shown) to notify the user (step b8). Then, the PCb 425 starts video data transfer to the video server 409 via the network b410 (step b9). The video server 409 stores the transferred video data.

  On the other hand, if the file data is document data (No in step b7), the PCb 425 displays a document data transfer start display on a monitor or the like (not shown) to notify the user (step b10). The PCb 425 stores the document data in its own storage device.

  By the way, if the TS separation unit 82 does not receive a TS packet having a flag indicating that it is file data for a predetermined period, the TS separation unit 82 determines that the reception of the file data is finished. When the TS separation unit 82 determines that the reception of the file data has been completed, the TS separation unit 82 notifies the file data reconstruction unit 84 of the completion of packet reception (step b11). Upon receiving the end of packet reception, the file data reconfiguration unit 84 issues a reconfiguration file data end request to the file transmission unit 85 (step b12). Upon receiving the reconfiguration file data end request, the file transmission unit 85 transmits a file data transfer end to the PCb 425 via the network b410 via the transmission network I / F unit 851. (Step b13).

  When receiving the end of file data transfer, the PCb 425 determines whether the file data transferred so far is video data (step b14). When the PCb 425 determines that the data is video data (Yes in Step b14), the PCb 425 displays a video data transfer end display on a monitor or the like (not shown) to notify the user (Step b15). Then, the transfer of the video data to the video server 409 is terminated (step b16). If the PCb 425 determines that the data is not video data (No in step b14), the PCb 425 displays a document data transfer end display on a monitor or the like (not shown) to notify the user (step b17). Then, the PCb 425 accepts reading of document data by a user operation (step b18).

  Through the above processing, the transmission system X transmits the transmitted video data and document data to the video server 409 or the PCb 425 via the network b410.

  In the present embodiment, the TC 102 has two input units, that is, an input of a video signal of the camera a 401 and an input of file data received via the network a 422, and further includes a plurality of input units. Also good. For example, an external device that outputs a TS signal may be connected and an input unit that receives an input of the TS signal may be included. In that case, the TS multiplexer 24 multiplexes those TS signals and passes them to the modulator 25.

  As described above, the present embodiment will be outlined. A transmission apparatus including a transmission-side apparatus that digitally modulates and transmits a TS signal. The transmission-side apparatus converts file data input via a network into TS packets. And a TS multiplexing unit that multiplexes a TS signal input from the TS packet converting unit and other TS signals.

  According to this embodiment, when a plurality of broadcast materials are transmitted to a broadcast station, they can be transmitted together by one transmission control device, so that the transmission path can be simplified and the management of related broadcast materials is facilitated. In addition, since file data can be transmitted via a network using a transmission device, there is no need to re-convert the filed video data into a video signal, and there are no restrictions on the video equipment or encoding method used for shooting. Can be transmitted. Thereby, the added value as a transmission apparatus increases.

  The present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

  The present invention can be applied to a transmission form in which a plurality of types of data are transmitted using a transmission apparatus.

It is a block diagram which shows the system configuration | structure of the transmission apparatus X of this embodiment. It is a functional block diagram which shows the structure of TC102 in the transmission apparatus X of this embodiment. It is a functional block diagram which shows the structure of RC104 in the transmission apparatus X of this embodiment. It is a schematic diagram which shows the protocol conversion process of the file data which TC102 and RC104 of the transmission apparatus X of this embodiment transmit / receive via a network. It is a sequence diagram which shows the transmission process of the file data in the transmission apparatus X of this embodiment. It is a sequence diagram which shows the flow control of the TS multiplexing part in the transmission apparatus X of this embodiment. It is a sequence diagram which shows the reception process of the file data in the transmission apparatus X of this embodiment. It is a block diagram which shows the system configuration | structure of the conventional transmission apparatus.

Explanation of symbols

102, 403 ... TC, 103 ... scanner, 104, 408 ... RC,
401 ... Camera a, 402 ... Video switch, 404 ... TH
405: Parabolic antenna for transmission, 406: Parabolic antenna for reception 407: RH, 409: Video server, 410: Network b
411 ... Camera b, 412 ... VTRa, 413 ... Media 421 ... Camera c, 422 ... Network a, 423 ... PCa
424 ... WAN, 425 ... PCb, 431 ... Covering document 432 ... FAXa, 433 ... PSTN, 434 ... FAXb
21 ... Video encoding unit, 22 ... TS packet conversion unit 23 ... File receiving unit, 231 ... Receiving network I / F unit 24 ... TS multiplexing unit, 25 ... Modulation , 26 ... Transmission control unit 81 ... Multi-tone unit, 82 ... TS separation unit, 83 ... Video decoding unit 84 ... File data reconstruction unit, 85 ... File transmission unit 851... Network I / F unit for transmission, 86. Reception control unit W.

Claims (1)

A transmission apparatus including a transmission side apparatus that digitally modulates and transmits a TS signal,
The transmission side device includes a TS packet conversion unit that converts file data input via a network into a TS packet;
A transmission apparatus comprising: a TS multiplexing unit that multiplexes a TS signal input from the TS packet conversion unit and another TS signal.

Images