JP2007235972A - Digital broadcast system, digital broadcast studio system and digital broadcast transmission station apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission line used to transmit control information, when various devices controlled from a studio are installed in a transmission station in digital broadcasting. <P>SOLUTION: A time division data transmitter 11 in a studio 10 transmits control information of various devices, installed in a transmission station 20 and a digital information signal, to be sent originally to the transmission station 20 in a time division. A data demultiplexer 21 in the transmission station 20 demultiplexes the received digital transmission signal into the control information and the digital information signal that are to have been originally sent. Then digital modulators 22A, 22B that modulate the demultiplexed digital information signal and digital transmitters 23A, 23B that transmit the modulated output are operated according to the demultiplexed control information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a digital broadcasting system used at the time of digital broadcasting, and a performance station apparatus and a transmission station apparatus for such digital broadcasting, and in particular, when various apparatuses that are controlled from a performance station are installed at a transmission station. The transmission of control information from the performer to the transmitter.

  Currently, television broadcasting is analog broadcasting, but various developments and research are being conducted for digital broadcasting, and digital broadcasting is expected to start in the near future.

  For example, in digital broadcasting, a single performance place can provide a plurality of channels (broadcast programs) simultaneously. For this reason, digital information signals for the plurality of channels are transmitted from the performance station to the transmission station, and each of the channels is digitally modulated and transmitted. In this case, each channel has the same modulation method and coding rate. It is not always modulated, and it is not always modulated with the same modulation scheme and coding rate in one channel. That is, there is a difference in the required image quality between a video such as a drama or a movie and a news video.

  Considering such things, it is predicted that a technique such as providing several modulators at the transmitting station and switching them, or changing the parameters of the modulator, etc. will be taken. A control signal for controlling such a parameter change of the modulator from the performance side is sent.

  Therefore, in digital broadcasting, when it is assumed that various devices that are controlled from a performance place are installed in the transmission station itself, it is necessary to secure a transmission path for transmitting the control information.

  The present invention has been made in view of the above points, and in digital broadcasting, when it is assumed that various devices for controlling from a performance place are installed at a transmission place, a transmission path for transmitting the control information. It is an object of the present invention to provide a digital broadcasting system capable of ensuring the above, and a performance station apparatus and transmitting station apparatus for such digital broadcasting.

In order to achieve the above object, the digital broadcasting system according to the present invention provides a dummy digital signal other than a digital information signal to be originally transmitted when a digital information signal is transmitted from a performance place to a transmission place using a digital transmission line. Multiplex control information to be used for the transmitting station equipment,
In the transmitting station, the control information is separated from the digital transmission signal transmitted from the playing station, and the apparatus in the transmitting station is controlled accordingly.

  In addition, the digital broadcast performance apparatus according to the present invention transmits a digital information signal from a performance station to a transmission station using a digital transmission path to a dummy digital signal unit other than the digital information signal to be originally transmitted. Time-division data for multiplexing and transmitting control information to be used for a certain device, and transmitting the control information and the digital information signal to be originally transmitted to the transmitting station in a time division manner A transmission means is provided.

The digital broadcasting transmitting station apparatus according to the present invention transmits a digital information signal from a performance station to a transmitting station using a digital transmission path to a dummy digital signal unit other than the digital information signal to be originally transmitted. In order to multiplex and transmit control information to be used for a certain device, and to receive the digital information signal to be originally transmitted,
Data separating means for separating the control information and the digital information signal to be originally transmitted from the digital transmission signal transmitted from the performance place;
A plurality of digital modulation means for performing predetermined modulation on the digital information signal to be originally transmitted separated by the data separation means according to the control information separated by the data separation means,
A plurality of digital transmission means for transmitting digital information signals modulated by the plurality of digital modulation means, respectively, according to the control information separated by the data separation means;
It is characterized by providing.

  That is, according to the digital broadcasting system, the digital broadcast performance apparatus, and the digital broadcast transmission apparatus according to the present invention, when a digital information signal is transmitted from the performance place to the transmission place using the digital transmission path, it is originally transmitted. Control information to be used for the transmitting station apparatus is multiplexed and transmitted to a dummy digital signal section other than the digital information signal to be transmitted. The transmitting station transmits the control information from the digital information signal transmitted from the performance station. And the devices in the transmitting station are controlled accordingly.

  Therefore, in digital broadcasting, when it is assumed that various devices to be controlled from a performance place are installed at a transmitting station, a transmission path for transmitting the control information can be secured.

  According to the present invention, in digital broadcasting, when it is assumed that various devices to be controlled from a performance place are installed at a transmitting station, a digital broadcasting system capable of securing a transmission path for transmitting the control information. , And such a digital broadcasting performance station apparatus and transmission station apparatus can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a digital broadcasting system according to an embodiment of the present invention, and the digital broadcasting system includes a performance place 10 and a transmission place 20. The performance place 10 is provided with a time division data transmission device 11, and the transmission place 20 is provided with a data separation device 21, a plurality of digital modulators 22A and 22B, a plurality of digital transmitters 23A and 23B, and the like. Has been.

  Control information generated by a device (not shown) in the performance station 10 is for controlling various devices configured in the transmitting station 20, such as the digital modulators 22A and 22B and the digital transmitters 23A and 23B. . For example, regarding the digital modulators 22A and 22B, it is possible to specify a modulation method, a coding rate, a transmission band for determining the capacity of a plurality of transmission paths, a data type to be transmitted on each transmission path, and the like. Regarding the digital transmitters 23A and 23B, the operation mode specification of the transmitter (automatic operation / remote control operation), the specification of the transmitter to be used, the specification of the power supply system (commercial power generation / in-house power generation), and the like can be considered.

  Further, the time division data transmission device 11 of the performance place 10 transmits the control information and a digital information signal generated by a device (not shown) at the performance place 10 to the transmission device 20 in a time division manner. The digital information signal supplied to the time-division data transmission device 11 is time-division multiplexed with real-time information signals such as moving images, announcement sounds, and attached data, and non-real-time information signals such as still images and sentences. It is a digital information signal that should be transmitted. When there is a difference between the bit rate of the digital information signal to be originally transmitted and the transmission bit rate between the performance place and the transmission place, the digital transmission signal transmitted on the transmission path is the above-mentioned performance of the performance place generation. In addition to the time and non-real time information signal, a dummy digital signal portion having no meaning is transmitted. Since the dummy digital signal portion is discarded at the transmitting station 20, it is possible to transmit an extra digital information signal between the performing station 10 and the transmitting station 20 by using the dummy digital signal portion. Therefore, the time division data transmission device 11 superimposes and transmits the control information on the dummy digital signal section.

  In the transmitting station 20 that receives the digital transmission signal on which the digitized control information is superimposed, the data separation device 21 separates the control information from the digital information signal to be originally transmitted. The separated control information is supplied to each of the plurality of digital modulators 22A and 22B and the plurality of digital transmitters 23A and 23B.

  The digital information signal is supplied to, for example, a plurality of orthogonal frequency division multiplexing digital modulators 22A and 22B, subjected to appropriate modulation according to the control information, and output to the digital transmitters 23A and 23B. The digital transmitters 23A and 23B transmit the supplied modulation output according to the control information, for example, the designation of the transmitter to be used.

  As described above, the control information is superimposed on the dummy digital signal section, and the transmitting station 20 separates the control information from the transmitted digital transmission signal to control various devices at the transmitting station. When the transmission capacity between the performance place and the transmission place is 40 Mbps, if the digital information signal is 25 Mbps, the remaining 15 Mbps can be used for transmission of control information.

  In this way, in digital broadcasting, when it is assumed that various devices that are controlled from the performance place are installed in the transmission station itself, a transmission path for transmitting the control information can be secured.

  While the present invention has been described based on one embodiment, the present invention is not limited to the above-described embodiment, and various modifications and applications are possible within the scope of the present invention. Of course.

  For example, in the above embodiment, the digital information signal supplied to the time division data transmission device 11 of the performance place 10 is supplied with the real time information signal and the non-real time information signal in a time division manner. Either of them may be time-division multiplexed with the other and transmitted to the transmitting station 20 at the subsequent stage of the time-division data transmission apparatus 11.

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

1 is a block diagram showing a configuration of a digital broadcast system according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Performance place 11 Time division data transmission apparatus 20 Transmission place 21 Data separation apparatus 22A, 22B Digital modulator 23A, 23B Digital transmitter

Claims (4)

When transmitting a digital information signal from a performance station to a transmitting station using a digital transmission line, control information used for the transmitting station device is multiplexed with a dummy digital signal section other than the digital information signal to be transmitted originally. Transmit
A digital broadcasting system characterized in that, at a transmitting station, the control information is separated from a digital transmission signal transmitted from the playing station, and devices in the transmitting station are controlled accordingly. The performance place includes time-division data transmission means for transmitting the control information and the digital information signal to be originally transmitted to the transmission place in a time division manner,
The above transmitting station
Data separating means for separating the control information and the digital information signal to be originally transmitted from the digital transmission signal transmitted from the performance place;
A plurality of digital modulation means for performing predetermined modulation on the digital information signal to be originally transmitted separated by the data separation means according to the control information separated by the data separation means,
A plurality of digital transmission means for transmitting digital information signals modulated by the plurality of digital modulation means, respectively, according to the control information separated by the data separation means;
The digital broadcasting system according to claim 1, further comprising: When transmitting a digital information signal from a performance station to a transmitting station using a digital transmission line, control information used for the transmitting station device is multiplexed with a dummy digital signal section other than the digital information signal to be transmitted originally. A digital broadcast performance apparatus for transmission,
A digital broadcast performance apparatus comprising a time division data transmission means for transmitting the control information and the digital information signal to be transmitted to the transmission station in a time division manner. When transmitting a digital information signal from a performance station to a transmitting station using a digital transmission line, control information used for the transmitting station device is multiplexed with a dummy digital signal section other than the digital information signal to be transmitted originally. A digital broadcasting transmitting station device for receiving the digital information signal and transmitting the digital information signal to be originally transmitted,
Data separating means for separating the control information and the digital information signal to be originally transmitted from the digital transmission signal transmitted from the performance place;
A plurality of digital modulation means for performing predetermined modulation on the digital information signal to be originally transmitted separated by the data separation means according to the control information separated by the data separation means,
A plurality of digital transmission means for transmitting digital information signals modulated by the plurality of digital modulation means, respectively, according to the control information separated by the data separation means;
A digital broadcasting transmitting station apparatus comprising:

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