KR100454782B1 - Digital broadcasting signals transmission apparatus - Google Patents

Abstract

The multi-processing unit receives the DII section packet and the event message section packet from the DII section buffer and the event message section buffer when the bandwidth occupancy rate of the television broadcast signal notified from the multiplexing device exceeds a predetermined threshold, and records them in the output buffer. A broadcast signal transmitting device configured to receive a data broadcast service packet having at least the highest priority set from a plurality of data broadcast service packet buffers and to record it in an output buffer.

The input data broadcast data is divided into a first data broadcast packet, a DII section packet, an event message section packet, and a second data broadcast packet that does not require real time compared to the first data broadcast packet. Each packet type is accumulated in a plurality of output buffers. When the bandwidth occupancy ratio for television broadcasting exceeds a predetermined threshold, the multiprocessing unit reads only the data broadcasting packet, the DII section packet, and the event message section packet having the highest priority from the plurality of output buffers at a fixed rate, and assigns them to the multipart. Digital broadcast signal multiplexing device multiplexed with the output of the TS multiprocessing unit.

Description

Digital broadcast signal transmitter {DIGITAL BROADCASTING SIGNALS TRANSMISSION APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast signal transmitting apparatus applied to digital television broadcasting systems such as satellite broadcasting and terrestrial broadcasting. In particular, the present invention can transmit data for high priority data broadcasting with good efficiency without being affected by fluctuations in the broadcasting band. A digital broadcast signal multiplexing device.

Recently, digital broadcasting by a satellite broadcasting system using a communication satellite or a broadcasting satellite has started. Moreover, the transition to terrestrial broadcasting systems is also planned.

In such digital broadcasting, digital broadcasting stations usually perform data broadcasting such as text broadcasting in addition to television broadcasting. That is, data broadcasting provides various information programs such as information linked to a television broadcast program and independent information not linked to a television broadcast program.

In general, the multiplexing output ratio, i.e., the bandwidth of a broadcast wave, in a digital broadcasting station is fixed in advance. For this reason, digital broadcasting stations must output data to be transmitted by data broadcasting at a ratio of a fixed multiplexing output minus a video and audio transmission rate for a television broadcasting program.

However, since the video and audio transmission ratios change depending on a television program or a video scene, the bandwidth available for data broadcasting is narrowed in some cases, and a lot of time is required for data transmission, and the data for data broadcasting with high priority is required. There is a problem that can not be transmitted in real time. On the contrary, when the occupied bandwidth of television broadcasting decreases, a lot of unused bands may be generated.

The present invention eliminates these shortcomings, and provides a broadcast signal transmission processing apparatus capable of transmitting data broadcasting data with good efficiency without particularly being affected by fluctuations in the broadcasting band. Provided is a digital broadcast signal multiplexing device capable of multiplexing and transmitting a broadcast signal.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a first embodiment of a domestic system to which a digital broadcast signal multiplexing device according to the present invention is applied.

FIG. 2 is a block diagram showing a specific configuration of the multiplexing device 13 of the domestic system shown in FIG.

3 is a block diagram showing a second embodiment of a domestic system to which a digital broadcast signal multiplexing device according to the present invention is applied;

FIG. 4 is a block diagram showing a specific configuration of the data broadcasting transmitter 15 of the domestic system shown in FIG.

Fig. 5 is a timing chart showing a band relationship between a television broadcast signal and a data broadcast signal in the above embodiment of a domestic system.

6 (a) and 6 (b) are timing diagrams for explaining the processing operation in the embodiment.

<Description of the symbols for the main parts of the drawings>

10: external control device

11: Video Encoder (MPEG-ENC)

12: voice encoder (AAC-ENC)

13: multiplexing unit (MUX)

14: encoding multiple control unit (EMC)

15: data broadcasting transmitter

16: transmission control unit (APC)

17: clock in the country

18: Data Server (DS)

130: transport stream (TS)

131: TS multiprocessing unit

132: multiple judgment unit

133: packet discriminating unit

1341 to 1344: output buffer

135: multiple parts

136: buffer monitoring unit

137: first multi-processing unit

The apparatus for transmitting broadcast signals according to the present invention includes a television broadcast signal which is allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further includes television broadcast material information indicating the location of a television broadcast program. And a plurality of pieces of data broadcasting material information indicating the location of data broadcasting programs, each of which is allocated to a band different from the band of the television broadcasting signal among the broadcasting bands, and which has priority, and periodic information including control information about the data broadcasting program. A broadcast signal transmission processing apparatus, which is used in a digital broadcast system for broadcasting a data broadcast signal to perform transmission of a data broadcast signal,

A part of the data broadcasting signal band is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcasting signal, and at least the data broadcasting material information and the period information having the highest priority are set to the fixed band, According to the priority, a plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band is selectively assigned to the variable band according to the priority according to the bandwidth occupancy of the television broadcasting signal included in the notification information from the external control means. And data broadcast signal output means for transmitting as a signal.

According to the broadcast signal transmission processing apparatus according to the present invention described above, the amount of information of the data broadcast signal can be varied according to the bandwidth occupancy ratio of the television broadcast signal notified from an external control means such as a multiplexing device. Therefore, when the bandwidth occupancy ratio of the television broadcast signal indicates the minimum, all programs are transmitted within the transmittable band so that the user can watch the data broadcasting program promptly even when the user starts reception, and the bandwidth occupancy ratio of the television broadcast signal is predetermined. When the threshold value is exceeded, optimal data transmission in accordance with band fluctuation can be performed, such as transmitting location information and period information of a data broadcast program having at least the highest priority set.

Moreover, the broadcast signal transmission processing apparatus according to the present invention is allocated to at least a part of a predetermined broadcast band based on control from an external control means, and further includes a television broadcast including television broadcast material information indicating the location of a television broadcast program. Period information including a plurality of data broadcasting material information indicating the location of a data broadcasting program assigned to a signal and a band different from the band of the television broadcasting signal among the broadcasting bands, and each of which has a priority set; A program sending processing device used in a digital broadcasting system for broadcasting a data broadcasting signal including a data broadcasting signal, wherein the program sending processing apparatus performs a sending process of the data broadcasting signal.

A part of the data broadcast signal band is set to a fixed band, the remaining band is set to a variable band according to the band share of the television broadcast signal, and the band share of the television broadcast signal included in the notification information from the external control means is predetermined. In the case where the threshold value is exceeded, data broadcasting signal output means for allocating at least the highest priority data broadcasting material information and period information to a fixed band and transmitting it as a data broadcasting signal is provided.

According to the broadcast signal transmission processing apparatus of the present invention, when the bandwidth occupancy ratio of the television broadcast signal exceeds a predetermined threshold, the data broadcast by the data broadcast is at least the data broadcasting material information and the period information of the data broadcast program in which the highest priority is set. It is only. For this reason, it is possible to effectively use the limited data broadcasting band among the broadcasting bands and to transmit data of high priority data broadcasting with good efficiency. In addition, it is possible to ensure transmission bands of data broadcasting material information and period information, which are always set to the highest priority, without being affected by the fluctuation of the band.

Another broadcast signal transmission processing apparatus according to the present invention is a television broadcast signal that is assigned to at least a portion of a predetermined broadcast band based on control from an external control means, and further includes television broadcast material information indicating the location of a television broadcast program. And a plurality of pieces of data broadcasting material information indicating the location of data broadcasting programs assigned to bands different from the bands of the television broadcasting signals among the broadcasting bands, and priorities including control information about the data broadcasting programs; A broadcast signal transmission processing apparatus which is used in a digital broadcast system for broadcasting a data broadcast signal including event message information including other additional information, and performs data transmission signal transmission processing.

A part of the data broadcast signal band is set to a fixed band, the remaining band is set to a variable band according to the band share of the television broadcast signal, and at least the data broadcasting material information, the period information, and the event message information having the highest priority are set. A plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band is selectively assigned to the variable band in accordance with the priority in accordance with the band occupancy and the occupancy ratio of the television broadcast signal included in the notification information from the external control means. And a data broadcast signal output means for assigning and transmitting the data broadcast signal.

Also in the broadcast signal transmission processing apparatus according to the present invention, since the information amount of the data broadcast signal can be varied in accordance with the bandwidth occupancy rate of the television broadcast signal notified from the external control means, the case where the bandwidth occupancy rate of the television broadcast signal indicates the minimum. In the case where the user starts receiving at any time, all programs are transmitted within a transmittable band so that the data broadcasting program can be quickly watched, and at least the highest priority is set when the bandwidth share of the television broadcast signal exceeds a predetermined threshold. Optimal data transmission according to the band fluctuation can be performed, such as transmitting only the location information, period information, and event message information of the data broadcasting program.

In addition, another broadcast signal transmission processing apparatus according to the present invention is allocated to at least a portion of a predetermined broadcast band based on control from an external control means, and further includes a television broadcast including television broadcast material information indicating the location of a television broadcast program. Period information including a plurality of data broadcasting material information indicating the location of a data broadcasting program assigned to a signal and a band different from the band of the television broadcasting signal among the broadcasting bands, and each of which has been prioritized, and periodic information including control information about the data broadcasting program. And a broadcast signal transmission processing apparatus for use in a digital broadcast system for broadcasting a data broadcast signal including event message information including other additional information, wherein the broadcast signal transmission processing apparatus transmits the data broadcast signal.

A part of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band share of the television broadcast signal, and the band share of the television broadcast signal included in the notification information from the external control means is predetermined. And a data broadcast signal output means for allocating at least the highest priority data broadcast material information, period information, and event message information to a fixed band and transmitting it as a data broadcast signal.

Also in the broadcast signal transmitting apparatus according to the present invention, data broadcasted by data broadcasting when the bandwidth occupancy ratio of the television broadcast signal exceeds a predetermined threshold is at least the highest priority of data broadcasting material information, period information, and event message. Information is only. For this reason, it becomes possible to effectively transmit the data of the data broadcasting with high priority by using the limited data broadcasting band among broadcasting bands efficiently.

The digital broadcast signal multiplexing device according to the present invention is allocated to at least a portion of a predetermined broadcast band based on control from an external control means, and furthermore, a television which indicates the location of a television broadcast program: a television broadcast including broadcast material information. Period information including a plurality of data broadcasting material information indicating the location of a data broadcasting program assigned to a signal and a band different from the band of the television broadcasting signal among the broadcasting bands, and each of which has been prioritized, and periodic information including control information about the data broadcasting program. A digital broadcast signal multiplexing device, which is used in a digital broadcast system for broadcasting a data broadcast signal having a packet structure, and selectively multiplexes and transmits a data broadcast signal to a television broadcast signal in accordance with notification information from an external control means.

Separating means for separating the input data broadcasting signal into a plurality of data broadcasting material information and period information, and a plurality of storing the plurality of data broadcasting material information and period information separated by the separating means for each piece of information by a predetermined number of packets. Buffers, multiplexing means for selectively multiplexing the outputs of the plurality of buffers to a television broadcast signal, a portion of a band of the data broadcast signal is set to a fixed band, and the remaining bands are variable bands according to the bandwidth occupancy ratio of the television broadcast signal. Television set included in the plurality of buffers, the data broadcasting material information and the period information set to at least the highest priority from the plurality of buffers are read at a ratio corresponding to the fixed band and given to the multiplexing means and included in the notification information from the external control means. Fixed band depending on band occupancy of broadcast signal Therefore, a plurality of data broadcast material information other than the information on the assigned data broadcast material priority to selectively reading comprises a read control means for imparting to said multiplexing means.

According to the digital broadcast signal multiplexing device of the present invention, a plurality of data broadcast material information are selected in order of high priority according to the bandwidth share of the television broadcast signal notified from the external control means, thereby determining the number of packets of the data broadcast signal to be transmitted. Can be varied. Therefore, when the bandwidth occupancy of the television broadcast signal is the minimum, all programs are multiplexed and transmitted into a television broadcast signal within a transmission band so that the user can watch the data broadcast program promptly no matter when the user starts reception. When the bandwidth occupancy ratio of the signal exceeds a predetermined threshold, optimal data transmission according to the band variation can be performed, such as multiplexing and transmitting at least the highest priority data broadcasting program material information and period information into a television broadcasting signal.

In addition, the digital broadcast signal multiplexing device according to the present invention is a television which is allocated to at least a part of a predetermined broadcast band based on control from an external control means and further includes television broadcast material information indicating the location of a television broadcast program. The broadcast signal includes a plurality of data broadcast material information indicating the location of a data broadcast program assigned to a band different from the band of the television broadcast signal among the broadcast bands, and each of which has a priority set, and control information relating to the data broadcast program. A digital broadcast signal multicasting field used in a digital broadcast system for broadcasting a data broadcast signal having a packet structure including period information, and selectively multiplexing the data broadcast signal to a television broadcast signal according to the notification information from an external control means. As,

Separating means for separating the input data broadcasting signal into a plurality of data broadcasting material information and period information, and a plurality of storing the plurality of data broadcasting material information and period information separated by the separating means for each piece of information by a predetermined number of packets. Buffers, multiplexing means for selectively multiplexing the outputs of the plurality of buffers to a television broadcast signal, a portion of the data broadcast signal band is set to a fixed band, and the remaining bands are assigned to a variable band according to the bandwidth occupancy of the television broadcast signal. When the bandwidth share of the television broadcast signal included in the notification information from the external control means exceeds a predetermined threshold, the data broadcasting material information and the period information set to at least the highest priority from the plurality of buffers are assigned to the fixed band. Read at the corresponding rate and append to the multiplexing means. Is provided with read control means.

In the digital broadcast signal multiplexing device according to the present invention, when the bandwidth occupancy ratio of the television broadcast signal exceeds a predetermined threshold, the data broadcasted by the data broadcast includes at least the material information and the period information of the data broadcast program showing the highest priority. do. For this reason, it becomes possible to effectively transmit the data of the data broadcasting with high priority by using the limited data broadcasting band among broadcasting bands efficiently. In addition, it is possible to secure transmission bands of the material information and the period information of the data broadcasting program which always show the highest priority without being affected by the fluctuation of the band.

In addition, another digital broadcast signal multiplexing device according to the present invention is allocated to at least a portion of a predetermined broadcast band based on control from an external control means, and further includes television broadcast material information indicating the location of a television broadcast program. The television broadcast signal includes a plurality of data broadcast material information indicating the location of the data broadcast program, which is allocated to a band different from the band of the television broadcast signal, and whose priority is set, respectively, and includes control information about the data broadcast program. A digital broadcast signal multiplexing device which is used in a digital broadcast system for broadcasting a data broadcast signal having a packet structure including period information, and selectively multiplexes the data broadcast signal to a television broadcast signal according to the notification information from an external control means. as,

Separating means for separating the input data broadcasting signal into a plurality of data broadcasting material information and period information, and a plurality of storing the plurality of data broadcasting material information and period information separated by the separating means for each piece of information by a predetermined number of packets. Buffers, multiplexing means for selectively multiplexing the outputs of the plurality of buffers to a television broadcast signal, buffer monitoring means for monitoring each packet of a plurality of data broadcasting material information and period information stored in the plurality of buffers, and data broadcasting A part of the signal band is set to a fixed band, the remaining band is set to a variable band according to the bandwidth share of the television broadcast signal, and the data broadcasting material information and the period information set to at least the highest priority from the plurality of buffers correspond to the fixed band. Read at a rate that is given to the multiplexing means Based on at least one of the bandwidth occupancy ratio of the television broadcast signal included in the notification information from the external control means and the monitoring result of the buffer monitoring means, a plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band is given priority. Read control means for selectively reading in accordance with the ranking and giving to the multiplexing means.

In the digital broadcast signal multiplexing device of the present invention, a television broadcast band is changed depending on the material, scene, etc. of a television broadcast program, and according to the change, the data broadcast packet is multiplexed into a television broadcast signal with good efficiency and transmitted. At this time, if the data broadcast packet is simply transmitted in accordance with the band fluctuation, the data broadcasting material information of the data broadcasting program having the highest priority in data broadcasting and the data broadcasting material information of the data broadcasting program of the next higher order will be uniformly changed. This affects even the data broadcasting material information of the highest priority which wants to suppress the amount of delay relatively. Therefore, the input data broadcasting signal is divided into a plurality of data broadcasting material information and periodic information, and stored in a plurality of buffers for each information, and the ratio management of the data broadcasting signal is monitored by monitoring the number of packets of each of the plurality of buffers. have. Therefore, a plurality of data broadcasting material information and period information can be allocated to a fixed band and multiplexed into a television broadcasting signal. The data broadcasting material information other than the data broadcasting material information allocated to the fixed band is the code amount of the material of the television broadcasting program. It can be multiplexed into a television broadcast signal by varying according to the change of.

In the digital broadcast signal multiplexing device according to the present invention described above, the same operation and effect can be obtained even when the data broadcast signal includes event message information including other additional information.

In the digital broadcast signal multiplexing device according to the present invention described above, when the number of packets stored in the plurality of buffers respectively exceeds a predetermined number, the buffer monitoring means performs stop control on the transmission source of the data broadcast signal. . In this way, when the number of packets stored in the buffer exceeds the predetermined number, the bandwidth occupancy rate of the television broadcast signal exceeds the predetermined threshold. Therefore, in the buffer exceeding the predetermined number for the transmission source of the data broadcasting signal, Stop control of packet transmission to be stored is performed. For this reason, processing load is suppressed low.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to drawings.

As shown in Fig. 1, an internal system to which a digital broadcast signal multiplexing device according to the present invention is applied includes an external control device 10, a video encoder (MPEG-ENC) 11, and an audio encoder. (AAC-ENC) 12, a multiplexing device (MUX) 13, a data broadcast transmitter 15, and a domestic clock 17 are provided. The external control device 10 includes, for example, an encoding multiple control unit (EMC) 14, an automatic program (broadcast signal) transmission control unit (APC) 16, and a data server (DS) 18.

The video encoder (MPEG-encoder) 11 compresses and encodes the video data signal of a television broadcast program by a video compression coding scheme based on Moving Picture Experts Group phase 2 (MPEG2) or MPEG4 to generate a bit stream 110, Output to the multiplexing device (MUX) 13. An audio encoder (AAC-encoder) 12 compresses and encodes a voice data signal of a television broadcast program in an encoding method based on Advanced Audio Coding (AAC) audio to generate a bit stream 120 and multiplex it. Output to device 13.

The data broadcast transmitting unit 15 carries out data carousel (ISO / IEC 13818-) for data broadcasting module data having a packet structure based on the indication information 160 provided from the automatic program transmitting control unit (APC) 16. 6) is a data broadcasting server which performs encoding according to PMT (ISO / IEC 13818-1) of a data broadcasting broadcasting service independent of a television broadcasting program, and transmits the encoding to the multiplexing device (MUX) 13. .

The multiplexing device 13 multiplexes a transport stream conforming to a plurality of MPEG systems to a transport stream conforming to one MPEG system. In the present embodiment, the outputs 110 and 120 of the video encoder 11 and the audio encoder 12 and the data broadcast data 150 output from the data broadcast transmitter 15 are multiplexed and transport stream TS It sends out as 130. The multiplexing device 13 generates data such as a program map table (PMT), a program association table (PAT), and the like based on the information output from the encoded multiple control unit (EMC) 14; Multiplexing is carried out to one transport stream (TS) 130 conforming to the MPEG system.

The encoder control signal 142 from the encoding multiple control unit (EMC) 14 is based on the indication information provided from the automatic program delivery control unit (APC) 16, the broadcast schedule data, and the knitting time measured by the domestic clock 17. The video encoder 11 and the audio encoder 12 are then transmitted with information necessary for performing encoding in accordance with MPEG and encoding in accordance with ACC audio, respectively. In addition, the video encoder 11 and the audio encoder 12 are transmitted to the video encoder 11 and the information necessary for the broadcast system for starting or ending the coding rate or the encoding.

The multiplexer control signal 140 from the encoding multiplexing control unit (EMC) 14 is information for multiplexing a transport stream conforming to a plurality of MPEG systems to a single transport stream with respect to the multiplexer (MUX) 13. And information for generating and multiplexing program specification information (PSI). The PSI, PMT, and PAT generated by the multiplexing device 13 include information on a program or information indicating whether data broadcast data is included in the transport stream (TS) 130.

The automatic program delivery control unit (APC) 16 encodes the multiplexed code (EMC) according to the broadcast schedule data (combination information) provided from the data server (DS) 18 and the program formation time measured by the domestic clock 17 ( 14) and an instruction control signal 160 to the data broadcast transmitter (server) 15. The instruction control signal 160 is data In a broadcasting system such as a carousel-based encoding and information necessary for performing encoding in accordance with a PMT (ISO / IEC 13818-1) of a data broadcasting service independent of a television program, and starting or ending an encoding rate or encoding. Send the necessary information.

As shown in FIG. 2, the configuration of the multiplexing device (MUX) 13 includes a TS multiplexer 131, a multiplexer 132, a packet discriminator 133, and a plurality of output buffers 1341 to 1344. And a multiplexer 135, a buffer monitor 136, and a first multiplexer 137.

The TS multiplexer 131 transmits multiple request information including data from the encoded multiplexer 14 to the multiplexer 132 and, based on the determination result of the request, the video encoder 11 and the audio encoder. Each bit stream 110, 120 from (12) is sent to the multiplexer 135 as a packet multiplex output 1310.

The multiple judging unit 132 transmits the determination result for the multiple requests from the TS multiprocessing unit 131 to the TS multiprocessing unit 131. This determination result includes the transmission rate of the television broadcast signal.

The packet distinguishing unit 133 inputs data broadcasting data 150 output from the data broadcasting transmitting unit 15, and sets a priority of the data broadcasting packet based on the control information 180 given from the data server 18; A download information display (DII) section packet as periodic information including control information relating to a data broadcast program, and an event message section packet including other additional information are distinguished.

Among the packets distinguished by the packet distinguishing unit 133, a predetermined number of first data broadcast packets requiring real time is sequentially maintained in the first output buffer 1342, and DII section packets are stored in the second output buffer 1342. The predetermined number is kept in sequence. A predetermined number of event message section packets are sequentially maintained in the third output buffer 1343, and a second number of data broadcast packets whose real time is not required as compared with the first data broadcasting packet are sequentially numbered in the fourth output buffer 1344. maintain.

The multiplexer 135 selectively multiplexes the output 1310 of the TS multiplexer 131 and the outputs of the respective output buffers 1341 to 1344. The buffer monitoring unit 136 monitors the number of packets held in each output buffer of the first output buffer 1341 to the fourth output buffer 1344.

The multiprocessing unit 137 sends the multi-request information 1370 to the multi-determination unit 132 based on the monitoring result of the buffer monitoring unit 136, and the multi-determination unit 132 for the multi-request 1370. On the basis of the determination result 1320 from, the read control of the packet held in each output buffer of the first output buffer 1341 to the fourth output buffer 1344 is performed.

FIG. 3 shows a second embodiment of a domestic system to which a digital broadcast signal multiplexing device according to the present invention is applied. As shown in the first embodiment of FIG. 1, a video encoder (V-ENC) 11 and an audio encoder are shown. (A-ENC) 12, Multiplexing Unit (MUX) 13, Encoding Multiple Control Unit (EMC) 14, Data Broadcast Output Unit 15, Automatic Program Transmission Control Unit (APC) 16, Domestic Clock ( 17) and a data server (DS) 18 are provided.

In this embodiment, the broadcast schedule data (combination information) provided from the data server (DS) 18 is configured to be sent to the data broadcast transmitting unit 15. The other structure is the same as that of embodiment of FIG.

FIG. 4 shows a specific configuration of the data broadcast transmitting unit 15 shown in the embodiment of FIG. 2, which includes a DII section buffer 151, an event message section buffer 152, and a plurality of data broadcast service packet buffers 1531. 153n), a second multiple processing unit 154, an output buffer 155, and a MUX transmission signal detection unit 156.

The DII section buffer 151 is input from the outside and stores a predetermined number of DII (Download Information Indication) section packet strings as periodic information including control information about a data broadcast program. The event message section buffer 152 stores a predetermined number of event message section packet strings that are input from the outside and include additional information related or independent of the data broadcast program.

The plurality of data broadcast service packet buffers 1531 to 153n are inputted from the outside, and the location information of the first data broadcast program for which real time is required, and the second data for which no real time is required as compared to the first data broadcast program. A predetermined number of data broadcast service packet streams including the location information of the broadcast program are stored.

The multi-processing unit 154 stores the DII section buffer 151 and the event based on the knitting information from the data server 18, the instruction information from the automatic program sending control unit 17, and the detection result by the MUX sending signal detecting unit 156. Packets are received from the message section buffer 152 and the plurality of data broadcast service packet buffers 1531 to 153n, the packet is analyzed, and the number of packet strings received in the output buffer 155 is recorded.

The output buffer 155 generates a data broadcast signal by storing the packet stream from the multiple processing unit 154, and outputs it to the multiplexing device (MUX) 13 as appropriate. The MUX transmission signal detection unit 156 detects the bandwidth occupancy ratio of the television broadcast signal as shown in FIG. 5 from the notification information 131 sent from the multiplexing device (MUX) 13. When it is determined from the detection result of the television broadcast signal band occupancy that the band occupancy has exceeded a predetermined threshold, the MUX transmission signal detection section 156 notifies the second multi-processing unit 154 that the threshold has been exceeded.

When the MUX transmission signal detection unit 156 is notified that the threshold has been exceeded, the second multi-processing unit 154 receives the packets from the DII section buffer 151 and the event message section buffer 152 at a predetermined fixed ratio, respectively. Data that is recorded in the output buffer 155 and whose highest priority is set from the plurality of data broadcast service packet buffers 1531 to 153n based on the priority of the data broadcast program notified from the data server 18 (FIG. 3). Only packets including the location information of the broadcast program are received and recorded in the output buffer 155.

The processing operation in the configuration of the above embodiment will be described.

First, as a basic concept of transmission, the transmission band of data broadcasting uses the remaining band of the band used for video / audio of a television broadcast program. Since video / audio in digital broadcasting employs a compression encoding technique defined by MPEG2, the band for television broadcasting varies depending on the video scene. Conventionally, since data for data broadcasting is transmitted at a fixed bit rate by setting a target of the remaining bands from the maximum code amount of video / audio in advance, a band in which nothing is multiplexed occurs even when the code amount of video / audio is reduced. It is becoming useless.

Therefore, in the first embodiment of the present invention, the data broadcasting data output from the data broadcasting transmitting unit 15 is directly input to the multiplexing apparatus (MUX) 13, and the multiplexing apparatus (MUX) 13 is adapted to the variation of the band. Transmission control of data for data broadcasting is performed. The mode of delivery control in this case is demonstrated with reference to FIG.6 (a), (b).

In the multiplexing device (MUX) 13, data broadcasting data from the data broadcasting transmitting unit 15 is input to the packet discriminating unit 133, and a first data broadcasting packet, a second data broadcasting packet, a DII section packet, an event message After separating into section packets, a predetermined number of packets are sequentially held in the respective output buffers 1341 to 1344. The packets held in each of the output buffers 1341 to 1344 are monitored by the buffer monitoring unit 136, respectively, and the monitoring result is notified to the multiple processing unit 137.

When the monitoring result from the buffer monitoring unit 136 is given, the first multi-processing unit 137 transmits the multi-request information to the multi-determination unit 132, and the band of the television broadcast signal from the determination result of the multi-request information. The occupancy rate, that is, the transmission rate of the television broadcast signal, is determined, and the priority of being notified from the data server 18 of the first data broadcast packet and the second data broadcast packet from each output buffer 1341 to 1344 based on the determination result. Read selectively according to the DII section packet and the event message section packet.

Here, when the bandwidth occupancy ratio of the television broadcast signal is equal to or less than a predetermined threshold, the first multiprocessing unit 137 reads the DII section packet and the event message section packet from the output buffers 1341 to 1344 at a predetermined fixed ratio, The high priority packets of the data broadcast packet and the second data broadcast packet are read at a fixed rate, and the first data broadcast packet and the second data broadcast packet of the next rank are read at a rate according to the bandwidth occupancy ratio, and the multi-part ( 135). By doing so, the packet stream as shown in Fig. 6A is output from the multiplex 135.

On the other hand, when the bandwidth occupancy ratio of the television broadcast signal exceeds a predetermined threshold, the multiplexer 137 only processes data broadcast packets, DII section packets, and event message section packets having the highest ranks from the plurality of output buffers 1341 to 1344. Read at a fixed rate. By doing so, the packet stream as shown in Fig. 6B is output from the multiplex 135.

Accordingly, for example, transmitting data of a high-priority data broadcasting program accompanying a video scene such as a quiz problem or a scene of a drama so as not to affect transmission even when the amount of video / audio code of the television broadcasting program is maximum. It becomes possible.

In the case where the bandwidth occupancy exceeds a predetermined threshold, for example, the second data broadcast packet having a lower priority is continuously maintained in the output buffer 1344. The accumulation amount of this output buffer 1344 is always notified to the buffer monitoring unit 136. The buffer monitoring unit 136 monitors the accumulation amount of the output buffer 1344, and notifies the data broadcasting transmission unit 15 of the buffer information for stopping the transmission of the second data broadcasting packet when the predetermined amount is exceeded.

As described above, in the first embodiment, the input data broadcast data is divided into a first data broadcast packet, a DII section packet, an event message section packet, and a second data broadcast packet by the packet discriminator 133, and outputted for each packet type. The accumulation amount of the output buffers 1341 to 1343 is monitored by the buffer monitoring unit 136 and stored in the buffers 1341 to 1343, and the multiple processing unit 137 is notified. Then, when the bandwidth occupancy ratio for television broadcasting exceeds a predetermined threshold, the multiprocessing unit 137 sets the data broadcasting packet, the DII section packet, and the event message section packet having the highest priority from the output buffers 1341 to 1343 at a fixed ratio. The reading stream is read, given to the multiplexer 135, and multiplexed with the output of the TS multiplexer 131 to generate and transmit a transport stream TS.

Therefore, whenever the band fluctuation occurs, there is no problem that the raw data of the data broadcasting program showing the highest priority and the raw data of the data broadcasting program showing the next priority are uniformly changed in the data broadcasting, and the data showing the highest priority. The broadcast packet, the DII section packet, and the event message section packet can be multiplexed into the television broadcast signal at a fixed rate, and the data broadcast packet of the next rank is multiplexed into the television broadcast signal by varying according to the change in the code amount of the material of the television program. can do. In addition, when the band occupancy ratio for television broadcasting exceeds a predetermined threshold, the limited bandwidth in the broadcasting band for data broadcasting can be effectively used to transmit data of the highest priority data broadcasting with good efficiency. The bandwidth of the data broadcasting packet, the DII section packet, and the event message section packet of high priority can be secured at all times without being affected by the fluctuation.

In addition, when the TV broadcasting band occupancy is the smallest, the broadcasting band for data broadcasting is fixed as in the past because all programs can be transmitted within the transmitting band so that the user can watch the data broadcasting program promptly even when the user starts receiving. By doing so, no waste is caused in the band, and accordingly, optimal data transmission according to the fluctuation of the band can be performed. That is, it becomes possible to raise the effective utilization rate of the whole broadcast band.

Further, when the television broadcasting band occupancy exceeds the predetermined threshold, the buffer monitoring unit 136 monitors the accumulation amount of the output buffers 1341 to 1344, and when the accumulation amount exceeds the predetermined amount, data broadcasting is sent. Since the stop control of the data broadcast packet is performed for the unit 15, it is not necessary to replace the plurality of output buffers 1341 to 1344 with a large-capacity buffer, and the processing load of the multiplexing device 13 is reduced to that extent. At the same time, it is resolved to be inexpensive.

In the second embodiment according to the present invention, the DII section buffer 151 according to the bandwidth occupancy rate of the television broadcast signal notified from the multiplexing device (MUX) 13 in the second multiplexing unit 154 of the data broadcast transmitting unit 15. The packet is selectively received from the event message section buffer 152 and the plurality of data broadcast service packet buffers 1531 to 153n in order of priority, and is written to the output buffer 155 before being output. As a result, the data broadcast service packet can be sent to the empty band, which has occurred conventionally, and the waiting time can be eliminated on the receiver side.

Here, in the data broadcasting transmitter 15, the multiprocessor 154 buffers the DII section according to the instruction from the automatic program transmission controller (APC) 16 and the organization information 180 from the data server (DS) 18. 151, selectively receives packets from the event message section buffer 152 and the plurality of data broadcast service packet buffers 1531 to 153n. At the same time, the multi-processing unit 154 records the data broadcasting service packet, the DII section packet, and the event message section packet having the highest priority set at a predetermined fixed rate in the output buffer 155, and is variable according to the bandwidth share of the television broadcasting signal. The next rank data broadcast service packet is written to the output buffer 155 at a rate.

The output buffer 155 then transmits the data broadcast signal of the packet string as shown in Fig. 6A to the multiplexing device (MUX) 13. In addition, in the data broadcast, all programs are repeatedly transmitted at regular time intervals so that the user can view the video at any time.

On the other hand, when the MUX transmission signal detection unit 156 determines that the bandwidth occupancy ratio of the television broadcast signal exceeds a predetermined threshold, the second multiplexer 154 receives the DII from the DII section buffer 151 and the event message section buffer 152. A section packet and an event message section packet are received and recorded in the output buffer 155, and at the same time, only the data broadcast service packets having the highest priority are set from the plurality of data broadcast service packet buffers 1531 to 153n, and the output buffer 155 is received. To record.

In doing so, the output buffer 155 transmits the data broadcast signal of the packet string as shown in Fig. 6B to the multiplexing device (MUX) 13. Accordingly, data of a high-priority data broadcasting program accompanying a video scene such as a quiz problem or a scene of a drama is transmitted so as not to affect transmission even when the amount of video / audio code of the television broadcasting program is maximized. It becomes possible.

Subsequently, the second multiplexer 154 monitors the notification information from the multiplexing device (MUX) 13, and the plurality of data broadcast service packet buffers 1531 to 15 when the bandwidth occupancy ratio of the television broadcast signal falls below a predetermined threshold. The reading of data broadcast service packets other than the highest order is resumed from 153n).

As described above, in the second embodiment, the DII section buffer 151 and the event message section buffer are executed by the multiple processing unit 154 when the bandwidth occupancy ratio of the television broadcast signal notified from the multiplexing device (MUX) 13 exceeds a predetermined threshold. Receives the DII section packet and the event message section packet from 152 and writes them to the output buffer 155, while receiving only the data broadcast service packets with the highest priority set from the data broadcast service packet buffers 1531 to 153n and output buffers. (155).

Therefore, it becomes possible to effectively use the limited band in the data broadcasting broadcast band and to transmit the data of the data broadcasting with high priority with good efficiency. In addition, it is possible to ensure the bandwidth of the data broadcasting service packet, the DII section packet, and the event message section packet having high priority at all times without being affected by the fluctuation of the band.

In addition, when the band occupancy of the television broadcast signal indicates the minimum, since all programs can be transmitted within the transmittable band so that the user can watch the data broadcasting program promptly even when the user starts reception, the broadcast band for data broadcasting is conventionally used. By being fixed, no waste is caused in the band, and accordingly, optimal data transmission according to the change of the band can be performed.

In the above embodiment, the data broadcasting service packet, the DII section packet, and the event message section packet having the highest priority are transmitted when the bandwidth occupancy ratio of the television broadcast signal exceeds a predetermined threshold, but the broadcast signal according to the present invention is transmitted. For example, the transmitting device may transmit only the data broadcast service packet and the DII section packet in which the highest priority is set. In addition, the use of event messages is not necessary for content dependence. In addition, the fixed band can be arbitrarily set, and depending on the setting, it is also possible to always transmit data broadcasting packets of the 1st, 2nd, and 3rd priority.

In addition, although the example which uses four output buffers was demonstrated in the said 1st Embodiment, the number of output buffers may be arbitrary depending on the data broadcasting data to handle. Further, in the first embodiment, the packet discrimination unit 133 uses the first data broadcast packet, the second data broadcast packet, the DII section packet, the event from the data broadcast data based on the control information from the encoding multiplex control unit 14. Message section packets were split. However, the present invention is not limited thereto, and the first data broadcast packet, the second data broadcast packet, the DII section packet, and the event message section packet may be separated from the data broadcast data based on a predetermined control information packet included in the data broadcast data. .

Although the above embodiment has been described with reference to a television broadcasting system using a fixed reception service, the present invention can also be applied to a broadcasting system for a mobile object or a broadcasting system for a portable receiving terminal using, for example, a portable receiving terminal. The present invention can also be applied to a computer system using a dedicated network or the Internet.

In addition, the configuration of the domestic system, the type and configuration of the data broadcasting transmitter, the control procedure and contents of the data broadcasting transmitter at the time of performing data broadcasting, the packet contents of the data broadcasting, and the like are also various within the scope of the present invention. It can be carried out by deformation.

As described above, according to the present invention, it is possible to provide a program delivery processing apparatus capable of transmitting data of at least high priority data broadcasting with good efficiency without being affected by fluctuations in the broadcast band.

Claims (21)

A first service broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and including first service material information indicating the location of a first service broadcast program; Second service material information indicating a location of a plurality of second service broadcast programs, each of which is allocated to a band different from the band of the first service broadcast signal and whose priority is set, and control information about the second service broadcast program. A program sending processing apparatus, which is used in a digital broadcasting system for broadcasting a second service broadcast signal including period information included therein, and performs a sending process of the second service broadcast signal. A part of the band of the second service broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the first service broadcast signal, and at least the second service material information set to the highest priority; and A second service material other than the second service material information allocated to the fixed band according to the bandwidth occupancy ratio of the first service broadcast signal included in the periodic information to the fixed band and included in the notification information from the external control means. And output means for selectively allocating information to the variable band in accordance with priority and transmitting the information as the second service broadcast signal. The method of claim 1, A part of a band of the second service broadcast signal is set to a fixed band, the remaining band is set to a variable band according to a band occupancy ratio of the first service broadcast signal, and the notification information from the external control means is included; When the bandwidth occupancy of the first service broadcast signal exceeds a predetermined threshold, the second service location information and the period information set to at least the highest priority are allocated to the fixed band and transmitted as the second service broadcast signal. A program delivery processing apparatus comprising an output means. The method according to claim 1 or 2, The output means includes a plurality of second service location information, a plurality of input buffers storing the period information for each information, an output buffer for storing input information and outputting the second service broadcast signal, and the plurality of inputs. The first service location information and period information set from the buffer to at least the highest priority at a rate corresponding to the fixed band and stored in the output buffer and included in the notification information from the external control means; Selectively reading out a plurality of pieces of second service location information other than the second service location information allocated to the fixed band from the plurality of input buffers according to a priority according to the bandwidth occupancy of the service broadcast signal, and storing the plurality of pieces of service information in the output buffer; A program comprising read control means Ex processor. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. Digital broadcasting a data broadcast signal including periodic data including a plurality of data broadcasting material information indicating the location of a data broadcasting program, each of which is assigned to a band different from the band and whose priority is set, and control information about the data broadcasting program. A program sending processing device used for a broadcasting system and performing a sending process of said data broadcasting signal, A part of the data broadcast signal band is set to a fixed band, the remaining band is set to a variable band according to the band share of the television broadcast signal, and at least the data broadcasting material information and the period information set to the highest priority are set to the fixed band. And selectively assigning the data broadcasting material information other than the data broadcasting material information allocated to the fixed band according to the priority in accordance with the bandwidth share of the television broadcast signal included in the notification information from the external control means. And a data broadcast signal output means for assigning to the data broadcast signal. The method of claim 4, wherein A portion of the data broadcast signal band is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the band of the television broadcast signal included in the notification information from the external control means. And a data broadcasting signal output means for allocating the data broadcasting material information and the period information set to at least the highest priority when the occupancy exceeds a predetermined threshold and transmitting the data broadcasting signal as the data broadcasting signal. Program delivery processing apparatus. The method according to claim 4 or 5, The data broadcast signal output means includes a plurality of input buffers for storing the plurality of data broadcast material information and the period information for each information, an output buffer for storing input information and outputting the data broadcast signal, and the plurality of inputs. The television broadcast signal contained in the notification information from the external control means while reading and storing data broadcasting material information and period information set to at least the highest priority from the buffer at a rate corresponding to the fixed band and stored in the output buffer; Read control means for selectively reading out a plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band from among the plurality of input buffers in accordance with the order of priority and storing in the output buffer according to the bandwidth occupancy ratio of the plurality of input buffers; Characterized by Program delivery processing apparatus. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. An event message including a plurality of data broadcasting material information indicating the location of a data broadcasting program each assigned to a band different from the band and having priority, period information including control information about the data broadcasting program, and other additional information; A program sending processing apparatus, which is used in a digital broadcasting system for broadcasting a data broadcasting signal including information, and performs a sending process of the data broadcasting signal, A part of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and at least the highest priority data broadcasting material information, period information, and event message are set. Assigns information to the fixed band, and prioritizes a plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band according to the band occupancy ratio of the television broadcast signal included in the notification information from the external control means. And a data broadcast signal output means for selectively allocating to the variable band and transmitting the data as the data broadcast signal. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. An event message including a plurality of data broadcasting material information indicating the location of a data broadcasting program each assigned to a band different from the band and having priority, period information including control information about the data broadcasting program, and other additional information; A program sending processing apparatus, which is used in a digital broadcasting system for broadcasting a data broadcasting signal including information, and performs a sending process of the data broadcasting signal, A part of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the television broadcast signal contained in the notification information from the external control means. Data broadcasting signal output means for allocating the data broadcasting material information, the period information, and the event message information having the highest priority set to the fixed band when the bandwidth occupancy exceeds a predetermined threshold and transmitting the data broadcasting signal as the data broadcasting signal; And a program dispensing processing apparatus comprising: a; The method according to claim 7 or 8, The data broadcast signal output means may include a plurality of input buffers storing the plurality of data broadcast material information, the period information, and the event message information for each information, an output buffer for storing input information and outputting the data broadcast signal; Reading data broadcasting material information, period information, and event message information having at least the highest priority among the plurality of input buffers at a rate corresponding to the fixed band and storing them in the output buffer; According to the bandwidth occupancy rate of the television broadcast signal included in the notification information, a plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band from the plurality of input buffers are selectively read out in accordance with the priority. To the output buffer And a read control means for storing the program. A first service broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and including first service material information indicating the location of a first service broadcast program; A plurality of pieces of second service location information indicating a location of a second service broadcast program assigned to a band different from the band of the first service broadcast signal and each of which has a priority set, and control information about the second service broadcast program. It is used in a digital broadcasting system for broadcasting a second service broadcast signal including period information included, and selectively multiplexes the second service broadcast signal to the first service broadcast signal according to the notification information from the external control means. A digital broadcast signal multiplexing device for transmitting, Separating means for separating the input second service broadcast signal into the plurality of second service location information and period information; A plurality of buffers for storing the plurality of pieces of second service location information and period information separated by the separating means for each piece of information by a predetermined number of packets; Multiplexing means for selectively multiplexing outputs of the plurality of buffers to the second service broadcast signal; A part of a band of the second service broadcast signal set to a fixed band, a remaining band to a variable band according to a band occupancy ratio of the first service broadcast signal, and a second set to at least the highest priority from the plurality of buffers Reading the service location information and the period information at a rate corresponding to the fixed band and giving the multiplexing means to the multiplexing means, and fixing the information according to the bandwidth occupancy ratio of the first service broadcast signal included in the notification information from the external control means. And a read control means for selectively reading out a plurality of pieces of second service location information other than the second service location information allocated to the band according to priority and giving the multiplexing means to the multiplexing means. The method of claim 10, Separating means for separating the input second service broadcast signal into the plurality of second service location information and period information; A plurality of buffers for storing the plurality of pieces of second service location information and period information separated by the separating means for each piece of information by a predetermined number of packets; Multiplexing means for selectively multiplexing outputs of the plurality of buffers to the first service broadcast signal; A part of the second service broadcast signal band is set to a fixed band, the remaining band is set to a variable band according to a band occupancy of the first service broadcast signal, and the notification information from the external control means is included; When the bandwidth occupancy rate of the first service broadcast signal exceeds a predetermined threshold, the multiplexing is performed by reading second service location information and period information set to at least the highest priority from the plurality of buffers at a rate corresponding to the fixed band. And a read control means attached to the means. The method of claim 10, Separating means for separating the input second service broadcast signal into the plurality of second service location information and period information; A plurality of buffers for storing the plurality of pieces of second service location information and period information separated by the separating means for each piece of information by a predetermined number of packets; Multiplexing means for selectively multiplexing outputs of the plurality of buffers to the first service broadcast signal; And buffer monitoring means for monitoring each packet of said plurality of second service location information and period information stored in said plurality of buffers. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. A data broadcast signal having a packet structure including a plurality of data broadcast material information indicating the location of a data broadcast program, each of which is allocated to a band different from the band and having periodic information including control information about the data broadcast program; A digital broadcast signal multiplexing device, which is used in a digital broadcasting system for broadcasting and selectively multiplexes the data broadcast signal to the television broadcast signal in accordance with notification information from the external control means, Separating means for separating the input data broadcast signal into the plurality of data broadcast material information and period information; A plurality of buffers for storing the plurality of pieces of data broadcasting material information and period information separated by the separating means for each information by a predetermined number of packets; Multiplexing means for selectively multiplexing the outputs of the plurality of buffers to the television broadcast signal; A part of a band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the data broadcasting material information and period set to at least the highest priority from the plurality of buffers Data broadcasting material information allocated to the fixed band in accordance with the bandwidth occupancy rate of the television broadcast signal included in the notification information from the external control means, while the information is read at a rate corresponding to the fixed band and given to the multiplexing means. And a read control means for selectively reading out a plurality of pieces of data broadcasting material information in accordance with a priority order and giving it to the multiplexing means. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. A data broadcast signal having a packet structure including a plurality of data broadcast material information indicating the location of a data broadcast program, each of which is allocated to a band different from the band and having periodic information including control information about the data broadcast program; A digital broadcast signal multiplexing device, which is used in a digital broadcasting system for broadcasting and selectively multiplexes the data broadcast signal to the television broadcast signal in accordance with notification information from the external control means, Separating means for separating the input data broadcast signal into the plurality of data broadcast material information and period information; A plurality of buffers for storing the plurality of pieces of data broadcasting material information and period information separated by the separating means for each information by a predetermined number of packets; Multiplexing means for selectively multiplexing the outputs of the plurality of buffers to the television broadcast signal; A portion of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the band of the television broadcast signal included in the notification information from the external control means. A read control means for reading data broadcasting material information and period information set to at least the highest priority from the plurality of buffers at a rate corresponding to the fixed band when the occupancy exceeds a predetermined threshold; Digital broadcast signal multiplexing device, characterized in that provided. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. A data broadcast signal having a packet structure including a plurality of data broadcast material information indicating the location of a data broadcast program, each of which is allocated to a band different from the band and having periodic information including control information about the data broadcast program; A digital broadcast signal multiplexing device, which is used in a digital broadcasting system for broadcasting and selectively multiplexes the data broadcast signal to the television broadcast signal in accordance with notification information from the external control means, Separating means for separating the input data broadcast signal into the plurality of data broadcast material information and period information; A plurality of buffers for storing the plurality of pieces of data broadcasting material information and period information separated by the separating means for each information by a predetermined number of packets; Multiplexing means for selectively multiplexing the outputs of the plurality of buffers to the television broadcast signal; Buffer monitoring means for monitoring each packet of the plurality of data broadcasting material information and the period information stored in the plurality of buffers; A part of a band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the data broadcasting material information and period set to at least the highest priority from the plurality of buffers Read information at a rate corresponding to the fixed band and give it to the multiplexing means, and at least one of the bandwidth occupancy ratio of the television broadcast signal included in the notification information from the external control means and the monitoring result of the buffer monitoring means. And a read control means for selectively reading out a plurality of pieces of data broadcasting material information other than the data broadcasting material information allocated to the fixed band according to the priority and giving the multiplexing means to the multiplexing means. Device. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. A plurality of data broadcasting material information indicating the location of data broadcasting programs assigned to bands different from the band, and each having priority, event message information including periodic information including control information about the data broadcasting program, and other additional information. A digital broadcast signal used in a digital broadcast system for broadcasting a data broadcast signal having a packet structure, wherein the digital broadcast signal selectively multiplexes and transmits the data broadcast signal to the television broadcast signal according to the notification information from the external control means. As of the transmission apparatus, Separating means for separating the input data broadcast signal into the plurality of data broadcast material information, period information, and event message information; A plurality of buffers for storing the plurality of pieces of data broadcasting material information, period information, and event message information separated by the separating means for each piece of information by a predetermined number of packets; Multiplexing means for selectively multiplexing the outputs of the plurality of buffers to the television broadcast signal; A part of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the data broadcasting material information and the period set to at least the highest priority from the plurality of buffers Information and event message information are read at a rate corresponding to the fixed band and given to the multiplexing means, and assigned to the fixed band according to the bandwidth occupancy ratio of the television broadcast signal included in the notification information from the external control means. And a read control means for selectively reading out a plurality of pieces of data broadcasting material information other than the data broadcasting material information in accordance with a priority and giving the multiplexing means to the multiplexing means. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. A plurality of data broadcasting material information indicating the location of data broadcasting programs assigned to bands different from the band, and each having priority, event message information including periodic information including control information about the data broadcasting program, and other additional information. A digital broadcast signal used in a digital broadcast system for broadcasting a data broadcast signal having a packet structure, wherein the digital broadcast signal selectively multiplexes and transmits the data broadcast signal to the television broadcast signal according to the notification information from the external control means. As of the transmission apparatus, Separating means for separating the input data broadcast signal into the plurality of data broadcast material information, period information, and event message information; A plurality of buffers for storing the plurality of pieces of data broadcasting material information, period information, and event message information separated by the separating means for each piece of information by a predetermined number of packets; Multiplexing means for selectively multiplexing the outputs of the plurality of buffers to the television broadcast signal; A portion of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the band of the television broadcast signal included in the notification information from the external control means. A reading for reading data broadcasting material information, period information, and event message information set to at least the highest priority from the plurality of buffers at a rate corresponding to the fixed band when the occupancy exceeds a predetermined threshold and giving the multiplexing means; A digital broadcast signal multiplexing device comprising control means. A television broadcast signal allocated to at least a portion of a predetermined broadcast band based on control from an external control means and further including television broadcast material information indicating the location of a television broadcast program, and the television broadcast signal of the broadcast band. A plurality of data broadcasting material information indicating the location of data broadcasting programs assigned to bands different from the band, and each having priority, event message information including periodic information including control information about the data broadcasting program, and other additional information. A digital broadcast signal used in a digital broadcast system for broadcasting a data broadcast signal having a packet structure, wherein the digital broadcast signal selectively multiplexes and transmits the data broadcast signal to the television broadcast signal according to the notification information from the external control means. As of the transmission apparatus, Separating means for separating the input data broadcast signal into the plurality of data broadcast material information, period information, and event message information; A plurality of buffers for storing the plurality of pieces of data broadcasting material information, period information, and event message information separated by the separating means for each piece of information by a predetermined number of packets; Multiplexing means for selectively multiplexing the outputs of the plurality of buffers to the television broadcast signal; Buffer monitoring means for monitoring each packet of the plurality of data broadcasting material information, period information, and event message information stored in the plurality of buffers; A part of the band of the data broadcast signal is set to a fixed band, the remaining band is set to a variable band according to the band occupancy of the television broadcast signal, and the data broadcasting material information and the period set to at least the highest priority from the plurality of buffers Information and event message information are read at a rate corresponding to the fixed band and given to the multiplexing means, and the bandwidth occupancy ratio of the television broadcast signal included in the notification information from the external control means and the monitoring result of the buffer monitoring means. And a read control means for selectively reading out a plurality of data broadcasting material information other than the data broadcasting material information allocated to the fixed band based on at least one of the plurality of data broadcasting material information according to the priority, and giving the multiplexing means. Broadcast signal multiple Ex devices. 19. The digital program according to claim 15 or 18, wherein the buffer monitoring means performs stop control on the transmission source of the data broadcast signal when the number of packets respectively stored in the plurality of buffers exceeds a predetermined number. Broadcast signal multiplexing device. 19. The apparatus as claimed in any one of claims 13 to 18, wherein said separating means has a function of separating said data broadcast signal under the control of said external control means. 19. The digital broadcast signal according to any one of claims 13 to 18, wherein the separation means has a function of separating the data broadcast signal based on a predetermined information packet included in the data broadcast signal. Multiple playout device.