JP2013229831A - Data broadcast generation apparatus, broadcast system, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data broadcast generation device that generates data ES for broadcasting where content for data broadcasting is multiplexed into video ES and sound ES to be transferred.SOLUTION: A data broadcast generation apparatus 50 of a broadcast system 1 of the present invention comprises: a data broadcast generation unit 53 that generates a data ES for broadcasting by data blocks in a specified carousel period; a transfer bit rate management unit 51 that performs one of: deletion of image information; reduction in accordance with the priority about categories in the content for the data broadcasting; and expansion of the transfer bit rate of the data broadcasting by lowering the bit rate or eliminating the transfer, of the video ES and/or sound ES, and controls generation of the data ES for broadcasting in the data broadcast generation unit 53 so as to transfer the content for data broadcasting in the specified carousel period.

Description

  The present invention relates to a data broadcasting technique, and more particularly to a data broadcast generating device, a broadcasting system, and a program for more efficiently transmitting a data broadcast to a receiver such as a mobile phone.

  In recent years, studies for realizing new broadcasting services for receivers such as mobile terminals and portable terminals such as area one-segment broadcasting and VHF-Low band multimedia broadcasting are in progress. In particular, as a content of the broadcasting service, a service combining video / audio / data broadcasting is being studied.

  In these broadcast services, provision of disaster information using broadcast waves is expected even after the occurrence of a disaster, even in situations where communication cannot be used due to interruption or congestion.

  On the other hand, since the transmission capacity is limited on these broadcasting services, and the content of data broadcasting contents such as disaster information often changes dynamically and sequentially, the upper limit of the transmission period of data broadcasting ( This is the upper limit of the period set by the broadcaster in operation, and often exceeds the “specified carousel period”).

  In such a case, in a broadcasting system related to current data broadcasting, when the content size is assumed to be large, a part of data ES (Elementary Stream) of content for data broadcasting is operated to be placed on a communication server. Yes. Thereby, on the receiver side, it is possible to access the communication server from the data broadcast screen for requesting reception of data transmitted by broadcast waves, and to acquire all data of the content for data broadcasting.

  For example, FIG. 14 shows a broadcasting system 100 related to conventional data broadcasting. The broadcast system 100 includes an encoding device 11, a data broadcast generation device 12, a communication server 13, a multiplexing device 15, and a transmission device 16.

  The encoding device 11 receives the video signal and the audio signal output from the camera 10 and performs encoding processing at a predetermined transmission bit rate by the video encoder 111 and the audio encoder 112, respectively, to generate a video ES and an audio ES. .

  The data broadcast generation device 12 receives data broadcast content such as disaster information from the content input unit 121 and the data broadcast generation unit 122 divides a file within a prescribed carousel period at a predetermined transmission bit rate into transmission units. Broadcast data ES composed of blocks is generated, and data blocks exceeding a prescribed carousel cycle are transmitted to the communication server 13 as communication data ES.

  The communication server 13 stores the communication data ES in a communication data DB (database) 14.

  The multiplexing device 15 multiplexes the video ES and audio ES generated by the encoding device 11 and the broadcast data ES generated by the data broadcast generation device 12 at a transmission bit rate of the allocated band, and transmits the multiplexed data. Transmit to device 16. Note that the broadcast data ES for content transmitted by data broadcasting is transmitted in a carousel configuration. For this reason, the multiplexer 15 makes the carousel cycle longer than the prescribed carousel cycle when the capacity of the data broadcasting content is large, and causes the receiver 20 to acquire the communication data ES by accessing the communication server 13. All data of data broadcasting contents can be acquired.

  The transmission device 16 generates a broadcast wave signal for the multiplexed video ES, audio ES, and broadcast data ES and transmits the broadcast wave signal to the broadcasting station 18. The broadcast station 18 transmits a broadcast wave so that the receiver 20 can receive the broadcast wave signal from the transmission device 16.

  The receiver 20 acquires the broadcast data ES from the broadcast wave in a carousel cycle rather than a prescribed carousel cycle, acquires information on the data broadcast screen for making a data reception request, and receives a data reception request from the data broadcast screen. The communication server 13 connected to the network 17 is accessed via the wireless communication device 19 and the communication data ES stored in the communication data DB 14 is acquired by the wireless carrier. Finally, the receiver 20 can acquire all data of the data broadcasting content by linking the broadcasting data ES related to the data broadcasting content and the communication data ES.

  For example, when there are twelve data blocks “D1” to “D12” constituting all data of the data broadcasting content, the broadcasting system 100 uses “D1” to “D4” as data blocks of the broadcasting data ES. "D5" to "D12" are transmitted to the receiver 20 as a data block of the communication data ES using the communication radio carrier. For example, as shown in FIG. 15A, the broadcasting system 100 transmits “D1” to “D4” in a carousel cycle longer than a prescribed carousel cycle, and as shown in FIG. 20 obtains communication data ES composed of data blocks for exceeding a prescribed carousel period placed on the communication server 13 by using a communication wireless carrier. Thereby, the receiver 20 can acquire all data of the data broadcasting content.

  However, the receiver 20 requires an operation for making a data reception request, and further, the reception response time until all data of the data broadcasting content is acquired becomes long. If it is urgent, there is a problem that sufficient broadcasting service cannot be realized.

  As a technique for solving this problem, while ensuring the use of a communication server, the content with a small amount of data is set as a lower layer and the content with a large amount of data is set as a higher layer by data broadcasting. A technique for transmitting data in a hierarchically structured data carousel is disclosed (for example, see Patent Document 1).

JP 2003-143089 A

  As described above, the mobile communication network may not be used in the event of a disaster, and it is desired to provide disaster information through a broadcast service.

  However, in the current broadcasting system related to data broadcasting, when the content size of data broadcasting content such as disaster information is expected to increase, a part of the data ES of the data broadcasting content is placed on the communication server. Therefore, the transmission cycle becomes longer, and the time from when the user of the receiver 20 selects the channel until the data broadcast can be browsed becomes longer. The current broadcasting system for data broadcasting has a problem that a sufficient broadcasting service cannot be realized from the viewpoint of providing disaster information that is sequentially updated and the content size dynamically changes and sometimes requires urgency.

  On the other hand, in the technique of Patent Document 1, it is possible to achieve more efficient information transmission than the broadcasting system related to the current data broadcasting described above by transmitting with a data carousel having a hierarchical structure including a plurality of layers. However, if the content size has a data amount exceeding the prescribed carousel period, a communication server must be used for a part of the data ES of the data broadcasting content.

  The present invention has been made in view of the above-described problems, and in order to transmit data broadcasting more efficiently to a receiver, the data broadcasting content is multiplexed and transmitted on video ES and audio ES. An object of the present invention is to provide a data broadcast generation apparatus, a broadcast system, and a program for generating broadcast data ES for the purpose.

  The data broadcast generation apparatus and the broadcast system according to the present invention perform control so that the carousel cycle does not change by adjusting the video / audio rate and the size of the data broadcast content according to the data broadcast content size.

  That is, the data broadcast generation apparatus of the present invention is a data broadcast generation apparatus that generates broadcast data ES for multiplexing and transmitting the video ES and the audio ES with respect to the data broadcast content. Is configured to be a data group of a category having a predetermined priority that can be classified at least one of image information and text information, and broadcast data ES in a data block within a prescribed carousel period. A data broadcast generation unit that generates a transmission bit rate when data broadcast is transmitted from the content size of the input data broadcast content, and when the derived transmission bit rate exceeds a predetermined threshold, An image whose content size is reduced by deleting the image information in the data broadcasting content Reduction determination processing, category reduction determination processing for reducing the content size by reducing the category in the data broadcasting content according to the priority, and lowering the transmission bit rate of the video ES and / or audio ES, Or, at least one of video / audio rate reduction determination processing for extending the transmission bit rate of data broadcasting by eliminating transmission of at least one of video ES and audio ES, and within a prescribed carousel period And a transmission bit rate management unit for controlling generation of broadcast data ES in the data broadcast generation unit so as to transmit the data broadcast content.

  In the data broadcast generation device of the present invention, the transmission bit rate management unit may transmit the transmission bit of two types of moving image files prepared in advance having different transmission bit rates for the same content to be transmitted by the video ES and the audio ES. The data broadcast generation unit further includes means for controlling the generation of the broadcast data ES so as to extend the transmission bit rate of the data broadcast from the transmission capacity when multiplexing the video ES and audio ES of the low-rate moving image file. It is characterized by that.

  Further, in the data broadcast generation device of the present invention, the transmission bit rate management unit, when the derived transmission bit rate exceeds a predetermined threshold, the low priority frame data ES and the high priority frame data ES for the data ES. And setting data of a category with high priority in the content for data broadcasting to the high priority frame data ES, and setting data of category with low priority in the content for data broadcasting to the low priority frame data ES The data broadcast generation unit generates the broadcast data ES so as to lower the transmission bit rate of the low priority frame data ES having a low priority and to increase the transmission bit rate of the high priority frame data ES having a high priority. It is further characterized by further comprising means for controlling

  Further, in the data broadcast generation device of the present invention, the transmission bit rate management unit, when the derived transmission bit rate exceeds a predetermined threshold, data for a data broadcast content exceeding a predetermined carousel cycle For broadcasting, the image information in the data broadcasting content is visualized and the data broadcasting moving image in which the text information is sounded is generated, and the video ES and the sound ES of the data broadcasting moving image are set as the multiplexed video ES and sound ES. Therefore, the data broadcast content further includes means for sending out data broadcast material exceeding the predetermined carousel cycle from the data broadcast generation unit.

  Further, in the data broadcast generation device of the present invention, the transmission bit rate management unit, when the derived transmission bit rate exceeds a predetermined threshold, data for a data broadcast content exceeding a predetermined carousel cycle The broadcast material is stored as storage service data ES in a predetermined storage service, and further includes means for controlling generation of the broadcast data ES in the data broadcast generation unit.

  In the data broadcast generating apparatus of the present invention, the transmission bit rate management unit further includes means for reducing the content size by eliminating punctuation marks from the text information in the data broadcast content.

  Further, the data broadcast generation device of the present invention is a data broadcast generation device that generates broadcast data ES for multiplexing and transmitting the video broadcast content and the audio ES with respect to the data broadcast content. Is configured to be a data group of a category having a predetermined priority that can be classified at least one of image information and text information, and broadcast data ES in a data block within a prescribed carousel period. A data broadcast generation unit that generates a transmission bit rate when data broadcast is transmitted from the content size of the input data broadcast content, and when the derived transmission bit rate exceeds a predetermined threshold, A low priority frame data ES and a high priority frame data ES are provided for the data ES, and the data broadcasting controller Data with a high priority in the content is set as the high priority frame data ES, and data with a low priority in the data broadcasting content is set as the low priority frame data ES. Transmission bit rate management for controlling the generation of broadcast data ES in the data broadcast generation unit so as to lower the transmission bit rate of the priority frame data ES and increase the transmission bit rate of the high priority frame data ES having a high priority. And a section.

  Further, the data broadcast generation device of the present invention is a data broadcast generation device that generates broadcast data ES for multiplexing and transmitting the video broadcast content and the audio ES with respect to the data broadcast content. Is configured to be a data group of a category having a predetermined priority that can be classified at least one of image information and text information, and broadcast data ES in a data block within a prescribed carousel period. A data broadcast generation unit that generates a transmission bit rate when data broadcast is transmitted from the content size of the input data broadcast content, and when the derived transmission bit rate exceeds a predetermined threshold, Of the data broadcasting content, data broadcasting material exceeding the predetermined carousel cycle is stored in the data A transmission bit rate management unit to be transmitted from the broadcast generation unit, and, for the data broadcast of the data broadcast content exceeding a predetermined carousel cycle, the image information in the data broadcast content is visualized and the text information is audio A data broadcast video generation unit that generates a data broadcast video that has been converted into a video ES and an audio ES to be multiplexed and the derived transmission bit rate exceeds a predetermined threshold And a data broadcast moving image switching unit for controlling transmission of the video ES and audio ES of the data broadcast moving image according to an instruction from the transmission bit rate management unit.

  Furthermore, the broadcasting system of the present invention is a broadcasting system that multiplexes and transmits data broadcasting content on video ES and audio ES, and stores the storage service data ES using a predetermined storage service. Deriving a transmission bit rate when transmitting by data broadcasting from the content size of the transmitting device and the input content of the data broadcasting, and when the derived transmission bit rate exceeds a predetermined threshold, the data broadcasting content A data broadcast generating device that transmits data storage material exceeding a predetermined carousel cycle to the storage service transmission device for storage, and generates broadcast data ES in data blocks within a prescribed carousel cycle; and the data Broadcast data ES transmitted from the broadcast generation device and the storage service transmission device And a multiplexing device that multiplexes the storage service data ES, the video ES, and the audio ES that are stored at the transmission bit rates of the allocated bands, and the multiplexed video ES, audio ES, and broadcast data. And a transmission device that generates a broadcast wave signal for the ES and the storage service data ES.

  Furthermore, the broadcasting system of the present invention is a broadcasting system that multiplexes and transmits data broadcasting content on video ES and audio ES, and the same content for transmission on video ES and audio ES has different transmission bit rates. A transmission bit rate for transmission by data broadcasting is derived from a moving image file DB storing two types of moving image files in advance and the content size of the input data broadcasting content, and the derived transmission bit rate is predetermined. The transmission bit rate of the data broadcast is expanded from the transmission capacity when multiplexing the video ES and audio ES of the video file having a low transmission bit rate among the two types of video files when the threshold is exceeded. Data broadcast generation device for generating broadcast data ES with data blocks within a carousel cycle A video transmission device that outputs a video ES and an audio ES of a video file having a low transmission bit rate when the derived transmission bit rate exceeds a predetermined threshold; and the video transmission device A multiplexing device that multiplexes the video ES and audio ES transmitted from the broadcast data ES generated by the data broadcast generation device at a transmission bit rate of the assigned band, and the multiplexed video ES And a transmitter for generating a broadcast wave signal for the audio ES and the broadcast data ES.

  Furthermore, the broadcasting system of the present invention is a broadcasting system that multiplexes and transmits data broadcasting content on video ES and audio ES, and stores the storage service data ES using a predetermined storage service. Deriving a transmission bit rate when transmitting by data broadcasting from the content size of the transmitting device and the input content of the data broadcasting, and when the derived transmission bit rate exceeds a predetermined threshold, the data broadcasting content A data broadcast generating device that transmits data storage material exceeding a predetermined carousel cycle to the storage service transmission device for storage, and generates broadcast data ES in data blocks within a prescribed carousel cycle; and the data Broadcast data ES transmitted from the broadcast generation device and the storage service transmission device And a multiplexing device that multiplexes the storage service data ES, the video ES, and the audio ES that are stored at the transmission bit rates of the allocated bands, and the multiplexed video ES, audio ES, and broadcast data. And a transmission device that generates a broadcast wave signal for the ES and the storage service data ES.

  Furthermore, the program of the present invention provides a computer configured as a data broadcast generation device that generates broadcast data ES for multiplexing and transmitting the video ES and audio ES for the data broadcast content. It is configured to be a data group of a category having a predetermined priority that can be classified by at least one of image information and text information, and broadcast data ES is represented by data blocks within a prescribed carousel period. And generating a transmission bit rate for transmission by data broadcasting from the content size of the input data broadcasting content, and when the derived transmission bit rate exceeds a predetermined threshold, Reduce content size by deleting image information in content Image reduction determination processing, category reduction determination processing for reducing content size by reducing categories in the data broadcasting content according to the priority, and whether to reduce the transmission bit rate of video ES and / or audio ES Or at least one of video / audio rate reduction determination processing for extending the transmission bit rate of data broadcasting by eliminating transmission of at least one of video ES and audio ES, and a prescribed carousel cycle And a step of controlling the generation of the broadcast data ES to transmit the data broadcast content in the data block.

  Data broadcasting content with dynamically changing data volume can be transmitted without exceeding the upper limit of the transmission cycle (default carousel cycle), so the content size is dynamically updated and urgent is required Even provision of content such as disaster information can provide sufficient broadcasting services.

1 is a block diagram of a data broadcast generation device and a broadcast system according to a first embodiment of the present invention. (A), (B), (C) is explanatory drawing of transmission of data ES in the data broadcast production | generation apparatus and broadcast system of 1st Embodiment by this invention. It is a figure which shows the example of a setting screen for inputting the setting information for setting the control by the transmission bit rate management part in the data broadcast production | generation apparatus of 1st Embodiment by this invention. It is a figure which shows an example of the control flow by the transmission bit rate management part in the data broadcast production | generation apparatus of 1st Embodiment by this invention. It is a block diagram of the data broadcasting production | generation apparatus and broadcasting system of 2nd Embodiment by this invention. (A), (B) is explanatory drawing of transmission of data ES in the data broadcast production | generation apparatus and broadcast system of 2nd Embodiment by this invention. It is a block diagram of the data broadcasting production | generation apparatus and broadcasting system of 3rd Embodiment by this invention. (A), (B) is explanatory drawing of transmission of data ES in the data broadcast production | generation apparatus and broadcast system of 3rd Embodiment by this invention. It is a block diagram of the data broadcasting production | generation apparatus and broadcasting system of 4th Embodiment by this invention. (A), (B), (C) is explanatory drawing of transmission of data ES in the data broadcast production | generation apparatus and broadcast system of 4th Embodiment by this invention. It is a block diagram of the data broadcasting production | generation apparatus and broadcasting system of 5th Embodiment by this invention. (A), (B), (C) is explanatory drawing of transmission of data ES in the data broadcast production | generation apparatus and broadcast system of 5th Embodiment by this invention. (A), (B), (C) is explanatory drawing of transmission of data ES in the data broadcast production | generation apparatus and broadcast system of 6th Embodiment by this invention. It is a block diagram which shows the broadcasting system regarding the conventional data broadcasting. (A), (B) is explanatory drawing of transmission of the data ES in the broadcasting system regarding the conventional data broadcasting.

[First Embodiment]
First, a data broadcast generation apparatus and a broadcast system according to a first embodiment of the present invention will be described. FIG. 1 is a block diagram of a data broadcast generation device 50 and a broadcast system 1 according to the first embodiment of the present invention. In FIG. 1, the same components as those shown in FIG. 14 are denoted by the same reference numerals. The broadcast system 1 according to the first embodiment includes an encoding device 11, a data broadcast generation device 50, a multiplexing device 15, and a transmission device 16, and can store contents such as disaster information without using a communication server. The transmission differs from that shown in FIG.

  The encoding device 11 receives a video signal and an audio signal output from the camera 10, and performs encoding processing at a transmission bit rate controlled by the data broadcast generation device 50 by the video encoder 111 and the audio encoder 112, respectively. ES and voice ES are generated.

  The data broadcast generation device 50 includes a transmission bit rate management unit 51, a content input unit 52, and a data broadcast generation unit 53. The content input unit 52 inputs data broadcast content such as disaster information and sends it to the data broadcast generation unit 53. Here, as will be described in detail later, the data broadcasting content is divided into data groups of predetermined categories, and the data of each category can be classified into at least one of image information and text information. And can be updated dynamically.

  In addition, the data broadcast generation device 50 can be configured by a computer including a predetermined operation unit and a monitor, and the content input unit 52 is configured to display a predetermined setting screen 1000 ( Setting information for setting control by the transmission bit rate management unit 51 can be input via FIG. 3 described later.

  First, the transmission bit rate management unit 51 checks the content size of the data broadcast content (in the following example, disaster information including a data group of a predetermined category) input to the data broadcast generation unit 53, and the data Deriving a transmission bit rate when transmitting by broadcasting, then comparing the derived transmission bit rate with a predetermined threshold, so that the content can be transmitted in a data block within a prescribed carousel period, Reduction of image information in the data broadcasting content, reduction according to the set priority of the category constituting the content, and transmission of video ES and / or audio ES, or video ES and / or At least one of the processes of extending the transmission bit rate of the data ES by reducing the transmission bit rate of the voice ES is performed, and the processing is performed. It controls the generation of the broadcast data ES in the data broadcast generating unit 53, controls the transmission bit rate of the video ES and audio ES at the video encoder 111 and audio encoder 112.

  Under the control of the transmission bit rate management unit 51, the data broadcast generation unit 53 generates broadcast data ES using data blocks within a prescribed carousel cycle and sends them to the multiplexing device 15.

  The multiplexing device 15 multiplexes the video ES and audio ES generated by the encoding device 11 and the broadcast data ES generated by the data broadcast generation device 50 at the transmission bit rate of the allocated band, and transmits the multiplexed data. Transmit to device 16. The data block of the broadcast data ES for content transmitted by data broadcasting is transmitted in a carousel configuration with a prescribed carousel cycle.

  The transmission device 16 generates a broadcast wave signal for the multiplexed video ES, audio ES, and broadcast data ES. As in the example shown in FIG. 14, the broadcast wave signal is sent to the broadcasting station 18 that transmits the broadcast wave so that the receiver 20 can receive the broadcast wave signal.

  In the present embodiment, for example, 15 “D1” to “D15” are included in the data broadcast content that is input to the data broadcast generation device 50. At this time, for example, as shown in FIG. 2A, the transmission bit rate at the normal time for the video ES, the audio ES, and the broadcast data ES (that is, the transmission bit when the transmission bit rate management unit 51 does not perform control). In the case of (rate), when transmission is not possible within a prescribed carousel period, consider the case where only "D1" to "D4" can be transmitted. In this case, when the transmission bit rate management unit 51 performs the process of reducing the image information in the content and the reduction according to the priority set for the category constituting the content, FIG. As shown, the content size can be reduced by thinning out the data amount of the data broadcasting content (for example, when the data block of the image information is “D5”, “D6”, “D7”). it can. Further, when the transmission bit rate management unit 51 performs processing for reducing the transmission bit rate of the video ES and audio ES and extending the transmission bit rate of the data ES, as shown in FIG. Among data broadcasting contents input to the generation device 50, data blocks ("D1" to "D4" and "D8" to "D15") transmitted by the broadcasting data ES are transmitted within a prescribed carousel period. can do. Accordingly, the receiver 20 can receive as a sufficient broadcasting service even for contents such as disaster information that is sequentially updated and the content size dynamically changes and may be urgent. . In addition to the processing order (Sa1 → Sa2) in which the transmission bit rate of the data ES is expanded after reducing the content size as described above, the content size after the transmission bit rate of the data ES is expanded. The processing order in the transmission bit rate management unit 51 is such that the processing order is reduced (Sb1 → Sb2), only the content size is reduced, or only the transmission bit rate of the data ES is expanded. Processing priorities and processing contents can be set on a predetermined setting screen 1000 (FIG. 3 described later).

  Next, an example of a setting screen 1000 for inputting setting information for setting control by the transmission bit rate management unit 51 in the data broadcast generation device 50 will be described with reference to FIG.

  Referring to FIG. 3, as a control by the transmission bit rate management unit 51 on the setting screen 1000, image information reduction processing (image reduction determination processing) in the content, and priorities set for categories constituting the content Reduction processing (category reduction determination processing) and processing for executing video ES and audio ES transmission bit rate reduction and data ES transmission bit rate expansion (video / audio rate reduction determination processing), respectively. Can be set.

  The range condition presentation screen 1001 displays the transmission bit rate of the data ES at the time of reduction (“data rate” or “data broadcast rate” in the figure) and the transmission bit rate of the data ES at the time of restoration from the reduced state ( “Data rate (return threshold)” or “data broadcast rate (return threshold)”), video ES transmission bit rate (“video rate”), and audio ES transmission bit rate (“audio rate”). ")), A range condition that can be set is presented.

  The image reduction setting screen 1002 is set to not reduce or delete image information in the content for data broadcasting, and the transmission bit rate of the data ES exceeds the first threshold of 000 Kbps as a condition for deletion. If the image is not transmitted (on-air), and the second threshold (return threshold) Δ △ ΔKbps is not exceeded, the setting screen enables setting of restoring the image data from the reduced state Is presented.

  On the category reduction setting screen 1003, the transmission bit rate of the data ES is set to the third threshold value as a condition for setting whether or not to delete a predetermined priority category in the data broadcasting content. If the data exceeds Kbps, data in the lower priority category will not be transmitted (not on the air), and if it does not exceed the fourth threshold (return threshold) △△△ Kbps, the data from the category will be reduced. This presents a setting screen that enables the setting of returning to the original state.

  Here, as shown in the category list 1006, the data broadcasting content is divided into data groups of predetermined categories, and the data of each category is classified into at least one of image information and text information. Can be updated dynamically. In this example, disaster information is illustrated as data broadcasting content, and it is indicated that the disaster information is designated to be a data group in seven predetermined categories. For example, content for disaster information data broadcasting is one of the categories of “safety information”, “word-of-mouth information”, “recommendation / instruction”, “refuge”, “medical institution”, “cooking”, and “water supply”. The data broadcasting material is composed of the above categories.

  “Safety information” is an item in which information for confirming the safety of a victim in a disaster area is described as text information as data, and the priority for transmission is defined as “high”. “Word of mouth information” is an item in which information collected about the damage situation in the disaster area is described as text information as data, and the priority at the time of transmission is defined as “low”. “Recommendation / Instruction” is an item that describes information such as refuge area or evacuation time recommended or instructed by the government or local government as data as image information and / or text information. The degree is defined as “high”. “Evacuation site” is an item that describes area and schedule information related to the evacuation site in the disaster area as image data and / or text information, and the priority for transmission is set as “low” . “Medical institution” is an item that describes area and schedule information related to the medical institution in the disaster area as data as image information and / or text information, and the priority for transmission is set as “low” . “Cooking” is an item that describes information on the area and schedule regarding cooking in the affected area as data in image information and / or text information, and the priority for transmission is defined as “low”. “Water supply” is an item that describes area and schedule information related to a water supply station in the stricken area as data as image information and / or text information, and the priority for transmission is defined as “low”.

  The video / audio rate reduction setting screen 1004 can be changed for each data broadcast rate range for each of the video ES and audio ES transmission bit rates in order to secure the transmission bit rate of the data broadcast. For example, when the transmission bit rate of the data ES exceeds the fifth threshold value 000 Kbps, the transmission bit rate of the video ES and the audio ES is limited by the set value, or the transmission of the video ES and / or the audio ES is performed. The setting to eliminate itself and the setting to return to the original state after reducing the video / audio rate if the sixth threshold (return threshold) Δ △ ΔKbps is not exceeded are possible within the range of multiple data broadcasting rates The setting screen to be displayed is presented. For this reason, you can add control settings in the range of multiple data broadcast rates by “+ Add” in the figure, or you can delete items in the rate range of data broadcasts that have been set by “□ Delete” in the figure. In the figure, “sort by data rate” is provided with an item for sorting and displaying a range of a plurality of data broadcast rates in the order of higher numerical values (or lower order).

  Next, an image reduction determination process, a category reduction determination process, and a video / audio rate reduction determination process performed by the transmission bit rate management unit 51 set on the setting screen 1000 will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of a control flow by the transmission bit rate management unit 51 in the data broadcast generation device 50 of the present embodiment. FIG. 4 shows an example in which control is performed in the order of the image reduction determination process, the category reduction determination process, and the video / audio rate reduction determination process. Of course, the order of these processes can be changed.

  First, the content of the data broadcast is input to the data broadcast generation unit 53 via the data broadcast input unit 52 (step S1). It is assumed that when the data broadcast content is input, control by the transmission bit rate management unit 51 is set on the setting screen 1000 shown in FIG. 3 assuming disaster information that changes dynamically and sequentially as the data broadcast content. .

(Image reduction judgment processing)
Subsequently, the transmission bit rate management unit 51 derives a transmission bit rate at the time of data broadcasting of the content related to data broadcasting (step S2).

  Subsequently, the transmission bit rate management unit 51 determines whether or not the image included in the content is reduced (step S3). If the image is reduced (step S3: No), the process proceeds to step S6. If not reduced (step S3: Yes), the process proceeds to step S4.

  When the process proceeds to step S4, the transmission bit rate management unit 51 determines whether image reduction is not executed or the transmission bit rate of data broadcasting <first threshold according to the setting conditions of the image reduction setting screen 1002 shown in FIG. If the setting condition is not satisfied at the time of image reduction (step S4: No), all image information included in the content is deleted (step S5), and if the setting condition is satisfied (step S4: Yes) ), The process proceeds to step S8. The deleted image information is temporarily stored in a predetermined memory (not shown) until the processing by the transmission bit rate management unit 51 is completed, including the arrangement information in the content.

  On the other hand, when the process proceeds to step S6, the transmission bit rate management unit 51 performs non-execution of image reduction or transmission bit rate of data broadcasting> second threshold (return) according to the setting conditions of the image reduction setting screen 1002 shown in FIG. If the setting condition is not satisfied (step S6: No), all the image information included in the content is restored from the reduced state (step S7), and the setting condition If satisfied (step S6: Yes), the process proceeds to step S8.

(Category reduction judgment processing)
Subsequently, the transmission bit rate management unit 51 derives a transmission bit rate at the time of data broadcasting of the content related to data broadcasting (step S8).

  Subsequently, the transmission bit rate management unit 51 determines whether or not the category included in the content has been reduced (step S9). If the category has been reduced (step S9: No), the process proceeds to step S12. If not reduced (step S9: Yes), the process proceeds to step S10.

  When the process proceeds to step S10, the transmission bit rate management unit 51 determines whether category reduction is not performed or the data broadcasting transmission bit rate <the third threshold according to the setting conditions of the category reduction setting screen 1003 shown in FIG. If the setting condition is not satisfied at the time of category reduction (step S10: No), the category included in the content is deleted according to the “priority” set (step S11), and the setting condition is satisfied. If (step S10: Yes), the process proceeds to step S14. The deleted category information is temporarily stored in a predetermined memory (not shown) until the processing by the transmission bit rate management unit 51 is completed, including the arrangement information in the content.

  On the other hand, when the process proceeds to step S12, the transmission bit rate management unit 51 performs category reduction non-execution or data broadcasting transmission bit rate> fourth threshold (returns) according to the setting conditions of the category reduction setting screen 1003 shown in FIG. If the setting condition is not satisfied (step S12: No), the information of all categories included in the content is restored from the reduced state (step S13). If the condition is satisfied (step S12: Yes), the process proceeds to step S14.

(Video / audio rate reduction judgment processing)
Subsequently, the transmission bit rate management unit 51 derives a transmission bit rate at the time of data broadcasting of the content related to data broadcasting (step S14).

  Subsequently, the transmission bit rate management unit 51 changes each transmission bit rate of the video ES and audio ES for each range of the data broadcasting rate in accordance with the setting conditions of the video / audio rate reduction setting screen 1004 shown in FIG. (Step S15). More specifically, the transmission bit rate management unit 51 compares the transmission bit rate of the data ES with the set fifth threshold value. If the fifth threshold value is exceeded, each of the transmission bit rates of the video ES and the audio ES is determined. Or the transmission of video ES and audio ES itself is eliminated. On the other hand, the transmission bit rate of the data ES is compared with a set sixth threshold value (return threshold value), and when the sixth threshold value (return threshold value) is exceeded, the video / audio rate is restored from the reduced state. .

  Subsequently, the transmission bit rate management unit 51 performs the above-described image reduction determination process, category reduction determination process, and video / audio rate until the content size reaches the data amount (number of data blocks) within a prescribed carousel cycle. The reduction determination process is repeatedly executed (step S16). Note that the transmission bit rate management unit 51 repeats this loop a predetermined number of times, and performs re-setting when it is determined that the content size does not become the data amount within the prescribed carousel period in the setting content based on the setting screen 1000. On the monitor.

  In this way, the transmission bit rate management unit 51 adjusts the transmission bit rate of the video ES, the audio ES, and the data ES, and optimizes the content size of the data broadcast so that it can be transmitted in a data block within a prescribed carousel cycle. Control to generate data ES.

In summary, the transmission bit rate management unit 51 automatically controls transmission of data ES related to data broadcasting content by setting priorities in the following five processes according to the data broadcasting content size.
(1) Lower the transmission bit rate of video and audio to widen the bandwidth of data broadcasting.
(2) Broaden the data broadcasting band without transmitting audio.
(3) Expand the data broadcasting band without transmitting video.
(4) Delete image information (for example, a still image such as a map) in the data broadcasting content to reduce the content size of the data broadcasting.
(5) Priorities are set for one or more categories in the data broadcasting content, and those with lower priority are deleted, and the size of the data broadcasting content is reduced.

  Accordingly, the receiver 20 can receive as a sufficient broadcasting service even for contents such as disaster information that is sequentially updated and the content size dynamically changes and may be urgent. .

[Second Embodiment]
Next, a data broadcast generation device and a broadcast system according to a second embodiment of the present invention will be described. FIG. 5 is a block diagram of a data broadcast generation device 50a and a broadcast system 1a according to the second embodiment of the present invention. In FIG. 5, the same components as those shown in FIG. 14 are denoted by the same reference numerals. The broadcasting system 1a according to the second embodiment includes a moving image file DB 21, a moving image sending device 22, a data broadcast generating device 50a, a multiplexing device 15, and a transmitting device 16, and is capable of disaster without using a communication server. It differs from that shown in FIG. 14 in that content such as information is transmitted. In the first embodiment, an example in which image reduction determination processing, category reduction determination processing, and video / audio rate reduction determination processing are performed when video and audio output from the camera 10 are multiplexed with data broadcasting will be described. However, the second embodiment is an example in which video and audio in a moving image file prepared in advance instead of the camera 10 are multiplexed with data broadcasting, and two types of moving image files having the same content and different transmission bit rates are prepared. The playback file is switched according to the data broadcasting content size. In the second embodiment, the image reduction determination process, the category reduction determination process, and the video / audio rate reduction determination process set based on the setting screen 1000 shown in FIG. 3 can be used in combination. It is.

  The moving image file DB 21 stores in advance two types of moving image files having different transmission bit rates for the same content to be transmitted as a video signal and an audio signal. A moving image file configured with a high transmission bit rate in advance is referred to as a “rate moving image file”, and is referred to as a “high rate moving image file”.

  The moving image sending device 22 includes a high rate moving image extraction unit 221 and a low rate moving image extraction unit 222, and the high rate moving image extraction unit 221 extracts a high rate moving image file from the moving image file DB 21 or a low rate moving image extraction unit. Whether the low-rate moving image file is to be extracted from the moving image file DB 21 by 222 is selected and controlled by the data broadcast generating device 50, and the selected moving image file is encoded to generate a video ES and an audio ES.

  The data broadcast generation device 50a includes a transmission bit rate management unit 51a, a content input unit 52a, and a data broadcast generation unit 53a. The content input unit 52a inputs data broadcast content such as disaster information and sends it to the data broadcast generation unit 53a. Here, as in the first embodiment, the content for data broadcasting is divided so as to be a data group of a predetermined category, and the data of each category is classified into at least one of image information and text information. Can be updated dynamically.

  Further, the data broadcast generation device 50a can be configured by a computer including a predetermined operation unit and a monitor, and the content input unit 52a displays a predetermined setting screen 1000 on the monitor in accordance with the input of the data broadcast content. The setting information for setting the control by the transmission bit rate management unit 51a can be input via the interface.

  The transmission bit rate management unit 51a first checks the content size of the content input to the data broadcast generation unit 53a (in this example, the disaster information is the same as in the first embodiment), and transmits the data broadcast. Deriving the transmission bit rate, and then comparing the derived transmission bit rate with a predetermined threshold value so that the content can be transmitted in the data block within the prescribed carousel period. At least one of the following: a reduction according to the set priority of a category constituting the content, and a reduction in the transmission bit rate of the video ES and the audio ES and an expansion of the transmission bit rate of the data ES Processing, and controls the generation of broadcast data ES in the data broadcast generation unit 53a, as well as the video encoder 111 and the audio Controlling the transmission bit rate of the video ES and audio ES at the encoder 112. In the present embodiment, the transmission bit rate management unit 51a is configured to be able to select either a low-rate moving image file or a high-rate moving image file in accordance with the transmission bit rate reduction processing of the video ES and audio ES. The transmission bit rate of each moving image file stored in the file DB 21 is ascertained in advance.

  Under the control of the transmission bit rate management unit 51 a, the data broadcast generation unit 53 a generates broadcast data ES composed of data blocks within a prescribed carousel period and sends it to the multiplexing device 15.

  The multiplexing device 15 multiplexes the video ES and audio ES transmitted from the moving image transmission device 22 and the broadcast data ES generated by the data broadcast generation device 50a at the transmission bit rate of the allocated band, and transmits the multiplexed data. Transmit to device 16. Note that the content broadcast data ES transmitted by data broadcasting is transmitted in a carousel configuration with a prescribed carousel cycle.

  The transmission device 16 generates a broadcast wave signal for the multiplexed video ES, audio ES, and broadcast data ES. As in the example shown in FIG. 14, the broadcast wave signal is sent to the broadcasting station 18 that transmits the broadcast wave so that the receiver 20 can receive the broadcast wave signal.

  In the present embodiment, for example, there are twelve "D1" to "D12" that constitute all data of the data broadcasting content when input to the data broadcast generating device 50a. At this time, for example, as shown in FIG. 6A, the video ES from the high-rate video file (high-rate video ES), the audio ES from the high-rate video file (high-rate audio ES), and the broadcast data ES If transmission cannot be performed within a specified carousel period at the normal transmission bit rate (that is, transmission bit rate when control by the transmission bit rate management unit 51a is not performed), only "D1" to "D4" can be transmitted. Think when you can't. In this case, in order to reduce the transmission bit rate of the video ES and audio ES by the transmission bit rate management unit 51a, the video ES from the low-rate video file (low-rate video ES) and the audio ES from the low-rate video file (low When the rate audio ES) is extracted and the transmission bit rate extension processing of the data ES is performed, as shown in FIG. 6 (B), the data broadcast content when being input to the data broadcast generation device 50a The data blocks ("D1" to "D12") that constitute all of the data can be transmitted within a prescribed carousel period. In addition, similarly to the first embodiment, the transmission bit rate management unit 51a performs processing of reducing image information in the content and reduction according to the priority set for the category constituting the content, Data blocks of data ES reduced by thinning out the data amount of data broadcasting content can be transmitted within a prescribed carousel period. Accordingly, the receiver 20 can receive as a sufficient broadcasting service even for contents such as disaster information that is sequentially updated and the content size dynamically changes and may be urgent. .

[Third Embodiment]
Next, a data broadcast generation device and a broadcast system according to a third embodiment of the present invention will be described. FIG. 7 is a block diagram of a data broadcast generation device 50b and a broadcast system 1b according to the third embodiment of the present invention. In FIG. 7, the same components as those shown in FIG. 14 are denoted by the same reference numerals. The broadcasting system 1b according to the third embodiment includes an encoding device 11, a data broadcast generation device 50b, a multiplexing device 15, and a transmission device 16, and content such as disaster information without using a communication server. The transmission differs from that shown in FIG. In the first embodiment, an example in which image reduction determination processing, category reduction determination processing, and video / audio rate reduction determination processing are performed when video and audio output from the camera 10 are multiplexed with data broadcasting will be described. However, in the third embodiment, the priority order is set for each data ES, that is, the low priority frame data ES and the high priority frame data ES are provided, and the high priority category data in the data broadcasting content is set high. The priority frame data ES is set, the category data having a low priority in the data broadcasting content is set as the low priority frame data ES, and the rate adjustment of the data ES is performed. In the third embodiment, the image reduction determination process, the category reduction determination process, and the video / audio rate reduction determination process set based on the setting screen 1000 shown in FIG. 3 can be used in combination. It is.

  The encoding device 11 receives the video signal and the audio signal output from the camera 10, and performs encoding processing at a transmission bit rate that can be controlled by the data broadcast generation device 50 by the video encoder 111 and the audio encoder 112, respectively. ES and voice ES are generated.

  The data broadcast generation device 50b includes a transmission bit rate management unit 51b, a content input unit 52b, and a data broadcast generation unit 53b. The content input unit 52b inputs data broadcast content such as disaster information and sends it to the data broadcast generation unit 53b. Here, as in the first embodiment, the content for data broadcasting is divided so as to be a data group of a predetermined category, and the data of each category is classified into at least one of image information and text information. Can be updated dynamically.

  In addition, the data broadcast generation device 50b can be configured by a computer including a predetermined operation unit and a monitor, and the content input unit 52b displays a predetermined setting screen 1000 on the monitor as the data broadcast content is input. The setting information for setting the control by the transmission bit rate management unit 51b can be input via the interface.

  The transmission bit rate management unit 51b first checks the content size of the content input to the data broadcast generation unit 53b (also in this example, the disaster information is the same as in the first embodiment), and transmits the data broadcast. A transmission bit rate is derived, and then the derived transmission bit rate is compared with a predetermined threshold value, and control is performed so that the content can be transmitted in a data block within a prescribed carousel period. More specifically, the transmission bit rate management unit 51b sets a priority for each data ES, that is, provides a low priority frame data ES and a high priority frame data ES, and has a high priority in data broadcasting content. The category data is set as the high priority frame data ES, and the low priority category data in the data broadcasting content is set as the low priority frame data ES to transmit the low priority frame data ES with a low priority. For the broadcast in the data broadcast generation unit 53a, the bit rate is lowered, the transmission bit rate of the high priority frame data ES having high priority is increased, and the predetermined carousel cycle is not exceeded even when the content size is increased. Controls transmission of data ES.

  Under the control of the transmission bit rate management unit 51b, the data broadcast generation unit 53b generates broadcast data ES with data blocks within a prescribed carousel period and sends them to the multiplexing device 15.

  The multiplexing device 15 multiplexes the video ES and audio ES transmitted from the encoding device 11 and the broadcast data ES generated by the data broadcast generation device 50b at the transmission bit rate of the assigned band, and transmits the multiplexed data. Transmit to device 16. Note that the content broadcast data ES transmitted by data broadcasting is transmitted in a carousel configuration with a prescribed carousel cycle.

  The transmission device 16 generates a broadcast wave signal for the multiplexed video ES, audio ES, and broadcast data ES. As in the example shown in FIG. 14, the broadcast wave signal is sent to the broadcasting station 18 that transmits the broadcast wave so that the receiver 20 can receive the broadcast wave signal.

  In the present embodiment, for example, the data ES constituting all the data of the content for data broadcasting when being input to the data broadcast generating device 50b includes nine “D1” to “D1” as data blocks of the high priority frame data ES. D9 ”and six“ D1 ′ ”to“ D6 ′ ”as data blocks of the low priority frame data ES. At this time, for example, as shown in FIG. 8 (A), a normal carousel is defined for the broadcast data ES at a normal transmission bit rate (that is, a transmission bit rate when control by the transmission bit rate management unit 51b is not performed). Let us consider a case where transmission is not possible within a period, and only "D1" to "D6" of the high priority frame data ES and "D1" to "D6" can be transmitted as the low priority frame data ES. In this case, when the transmission bit rate management unit 51b performs a process of reducing the transmission bit rate of the low priority frame data ES and extending the transmission bit rate of the high priority frame data ES, FIG. ), The data blocks ("D1" to "D9" and "D1 '" to "D6'") constituting all the data of the content for data broadcasting when being input to the data broadcast generating device 50b are displayed. It can be transmitted within a specified carousel period. In addition, similarly to the first embodiment, the transmission bit rate management unit 51b performs processing of reducing image information in the content and reduction according to the priority set for the category constituting the content, Data blocks of data ES reduced by thinning out the data amount of data broadcasting content can be transmitted within a prescribed carousel period. In this way, by assigning to the set high priority frame data ES and low priority frame data ES for each content category of data broadcasting, and adjusting the transmission bit rate among a plurality of ESs according to the content size The receiver 20 can receive a sufficient broadcast service even for content such as disaster information that is updated sequentially and the content size dynamically changes and may require urgency.

[Fourth Embodiment]
Next, a data broadcast generation device and a broadcast system according to a fourth embodiment of the present invention will be described. FIG. 9 is a block diagram of a data broadcast generation device 50c and a broadcast system 1c according to the fourth embodiment of the present invention. In FIG. 9, the same components as those shown in FIG. 14 are denoted by the same reference numerals. The broadcasting system 1c according to the fourth embodiment includes an encoding device 11, a data broadcast generation device 50c, a multiplexing device 15, and a transmission device 16, and can store contents such as disaster information without using a communication server. The transmission differs from that shown in FIG. In the first embodiment, an example in which image reduction determination processing, category reduction determination processing, and video / audio rate reduction determination processing are performed when video and audio output from the camera 10 are multiplexed with data broadcasting will be described. However, in the fourth embodiment, when it is determined that the content size for data broadcasting is large, a part of the data broadcasting content of the data broadcasting content (that is, the data broadcasting material exceeding the predetermined carousel cycle) For example, image information such as a predetermined map or a notification still image is converted into a video, a data broadcast moving image in which text information of a character part is converted into audio is automatically generated, and data is transmitted from the video ES and audio ES sent from the encoding device 11. Switch to broadcast video image ES and audio ES. In the third embodiment, the image reduction determination process, the category reduction determination process, and the video / audio rate reduction determination process set based on the setting screen 1000 shown in FIG. 3 can be used in combination. It is.

  The encoding device 11 receives the video signal and the audio signal output from the camera 10, and performs encoding processing at a transmission bit rate that can be controlled by the data broadcast generation device 50 c by the video encoder 111 and the audio encoder 112, respectively. ES and voice ES are generated.

  The data broadcast generation device 50c includes a transmission bit rate management unit 51c, a content input unit 52c, a data broadcast generation unit 53c, a data broadcast video generation unit 54c, and a data broadcast video switching unit 55c. The content input unit 52c inputs data broadcast content such as disaster information and sends it to the data broadcast generation unit 53c. Here, as in the first embodiment, the content for data broadcasting is divided so as to be a data group of a predetermined category, and the data of each category is classified into at least one of image information and text information. Can be updated dynamically.

  In addition, the data broadcast generation device 50c can be configured by a computer including a predetermined operation unit and a monitor, and the content input unit 52c displays a predetermined setting screen 1000 on the monitor as the data broadcast content is input. The setting information for setting the control by the transmission bit rate management unit 51c can be input via the interface.

  The transmission bit rate management unit 51c first checks the content size of the content input to the data broadcast generation unit 53c (also in this example, the same disaster information as in the first embodiment), and transmits the data broadcast. A transmission bit rate is derived, and then the derived transmission bit rate is compared with a predetermined threshold value, and control is performed so that the content can be transmitted in a data block within a prescribed carousel period. More specifically, when the transmission bit rate management unit 51c determines that the data broadcast content size is large, the data broadcast material of the data broadcast content exceeding the predetermined carousel cycle is, for example, a predetermined map or An instruction is given to the data broadcast generation unit 53c to automatically generate a data broadcast moving image in which image information such as a still image is converted into a video and text information of a character part is converted into sound. The data broadcast generation unit 53c instructs the data broadcast video switching unit 55c to switch from the audio ES to the video ES and audio ES of the data broadcast video so that the predetermined carousel cycle does not exceed even if the content size increases. Controls transmission of broadcast data ES.

  Under the control of the transmission bit rate management unit 51c, the data broadcast generation unit 53c generates broadcast data ES with data blocks within a prescribed carousel cycle, sends the data ES to the multiplexing device 15, and exceeds the predetermined carousel cycle. Are sent to the data broadcast moving image generation unit 54c. Here, regarding “data broadcasting material exceeding a predetermined carousel period”, the transmission bit rate management unit 51c is divided so that the data broadcasting content is a data group of a predetermined category. Since data can be classified into at least one of image information and text information, automatic control is performed so that image information is converted into video and text information is converted into audio in content exceeding a predetermined carousel period. It is possible.

  The data broadcast moving image generation unit 54c generates a data broadcast moving image for the data broadcast material that exceeds the predetermined carousel cycle transmitted from the data broadcast generation unit 53c. The moving image for data broadcasting referred to here is a moving image file that is a video signal that sequentially switches image information consisting of a plurality of still images in a predetermined repetition, and is an audio signal that is voiced with respect to text information. Accordingly, when the transmission bit rate management unit 51c determines that the content size of the data broadcast is increased, the data broadcast moving image generation unit 54c performs data broadcast on the data broadcast material exceeding the predetermined carousel cycle from the data broadcast generation unit 53c. Video can be generated automatically. It should be noted that when a data broadcast moving image is generated for a data broadcast material exceeding a predetermined carousel cycle, it may be determined that only a specific category is performed.

  Under the control of the transmission bit rate management unit 51c, the data broadcast video switching unit 55c converts the video ES and audio ES (56c shown) of the data broadcast video from the video ES and audio ES (57c shown) sent from the encoding device 11. To the multiplexing device 15.

  The multiplexing device 15 multiplexes the video ES and audio ES sent from the data broadcast moving image switching unit 55c and the broadcast data ES generated by the data broadcast generation device 50c at the transmission bit rates of the assigned bands. To the transmission device 16. Note that the content broadcast data ES transmitted by data broadcasting is transmitted in a carousel configuration with a prescribed carousel cycle.

  The transmission device 16 generates a broadcast wave signal for the multiplexed video ES, audio ES, and broadcast data ES. As in the example shown in FIG. 14, the broadcast wave signal is sent to the broadcasting station 18 that transmits the broadcast wave so that the receiver 20 can receive the broadcast wave signal.

  In the present embodiment, for example, there are twelve "D1" to "D12" that constitute all data of the data broadcasting content when input to the data broadcasting generating device 50c. At this time, for example, as shown in FIG. 10 (A), a normal carousel is defined for the broadcast data ES at a normal transmission bit rate (that is, a transmission bit rate when control by the transmission bit rate management unit 51c is not performed). Consider a case where only “D1” to “D6” can be transmitted when transmission is not possible within a period. In this case, the transmission bit rate management unit 51c performs switching control from the video ES and audio ES (57c in the figure) sent from the encoding device 11 to the video ES and audio ES (56c in the figure) of the data broadcast moving image. In this case, as shown in FIG. 10 (B), the data blocks of the data ES constituting all the data of the content for data broadcasting when being input to the data broadcast generating device 50c are transmitted within a prescribed carousel cycle. be able to. In addition, similarly to the first embodiment, the transmission bit rate management unit 51c performs processing of reducing image information in the content and reduction according to the priority set for the category constituting the content, Data blocks of data ES reduced by thinning out the data amount of data broadcasting content can be transmitted within a prescribed carousel period. As a result, as shown in FIG. 10C, the receiver 20 can update the receiver even if it is content such as disaster information that is sequentially updated and the content size dynamically changes and may require urgency. On the screen 2000, the data broadcast moving image display unit 2001 reproduces information related to the data broadcast material that exceeds the predetermined carousel cycle as video or audio, and the data broadcast display unit 2002 displays the data broadcast material within the predetermined carousel cycle. Information can be reproduced and received as a sufficient broadcasting service.

[Fifth Embodiment]
Next, a data broadcast generation device and a broadcast system according to a fifth embodiment of the present invention will be described. FIG. 11 is a block diagram of a data broadcast generation device 50d and a broadcast system 1d according to the fifth embodiment of the present invention. In FIG. 11, the same components as those shown in FIG. 14 are denoted by the same reference numerals. The broadcast system 1d of the fifth embodiment includes an encoding device 11, a data broadcast generation device 50d, a storage service transmission device 60d, a multiplexing device 15, and a transmission device 16, and does not use a communication server. 14 differs from that shown in FIG. 14 in that content such as disaster information is transmitted. In the first embodiment, an example in which image reduction determination processing, category reduction determination processing, and video / audio rate reduction determination processing are performed when video and audio output from the camera 10 are multiplexed with data broadcasting will be described. However, according to the fifth embodiment, when it is determined that the content size of the data broadcast becomes large, the VHF for some data broadcast materials (that is, the data broadcast materials exceeding the predetermined carousel period) among the data broadcast contents. -The storage service data ES assumed in Low band multimedia broadcasting or the like is automatically generated, and contents other than the data broadcast material created as the storage service data ES are transmitted as the broadcast data ES. In the fifth embodiment, the image reduction determination process, the category reduction determination process, and the video / audio rate reduction determination process set based on the setting screen 1000 shown in FIG. 3 can be used in combination. It is. Regarding the storage service assumed in VHF-Low band multimedia broadcasting, etc., see “Hitoshi Mitsui et al.,“ Study on contents storage and reception characteristics of VHF-Low band multimedia broadcasting using data carousel transmission system ”, Refer to the Institute of Image Information and Television Engineers, Technical Report of the Institute of Image Information and Television Engineers, 35 (13), 5-10, 2011-03-04.

  The encoding device 11 receives the video signal and the audio signal output from the camera 10, and performs encoding processing at a transmission bit rate that can be controlled by the data broadcast generation device 50 by the video encoder 111 and the audio encoder 112, respectively. ES and voice ES are generated.

  The data broadcast generation device 50d includes a transmission bit rate management unit 51d, a content input unit 52d, and a data broadcast generation unit 53d. The content input unit 52d inputs data broadcast content such as disaster information and sends it to the data broadcast generation unit 53d. Here, as in the first embodiment, the content for data broadcasting is divided so as to be a data group of a predetermined category, and the data of each category is classified into at least one of image information and text information. Can be updated dynamically.

  Further, the data broadcast generation device 50d can be configured by a computer including a predetermined operation unit and a monitor, and the content input unit 52d displays a predetermined setting screen 1000 on the monitor as the data broadcast content is input. Setting information for setting the control by the transmission bit rate management unit 51d can be input.

  The transmission bit rate management unit 51d first checks the content size of the content input to the data broadcast generation unit 53d (also in this example, disaster information similar to that of the first embodiment), and transmits the data broadcast. A transmission bit rate is derived, and then the derived transmission bit rate is compared with a predetermined threshold value, and control is performed so that the content can be transmitted in a data block within a prescribed carousel period. More specifically, when the transmission bit rate management unit 51d determines that the data broadcast content size is large, the VHF-Low band multi-data is transmitted for the data broadcast material that exceeds a predetermined carousel period in the data broadcast content. As the storage service data ES, the data broadcast generation unit 53d is instructed to automatically generate the storage service data ES assumed in media broadcasting or the like so that the predetermined carousel cycle does not exceed even if the content size increases. The data broadcast generation unit 53d is instructed to transmit content other than the created data broadcast material as broadcast data ES.

  Under the control of the transmission bit rate management unit 51d, the data broadcast generation unit 53d generates broadcast data ES with data blocks within a prescribed carousel cycle, sends the data ES to the multiplexing device 15, and exceeds the predetermined carousel cycle. Are sent to the storage service transmission unit 61d of the storage service transmission device 60d. It should be noted that when data broadcast material exceeding the predetermined carousel cycle is transmitted to the storage service transmission device 60d, it may be determined that only a specific category is performed.

  The storage service transmission device 60d includes a storage service transmission unit 61d, a storage data broadcast content DB 62d, and a storage content DB 63d. The storage service transmission device 60d stores the existing storage content assumed in the VHF-Low band multimedia broadcast etc. in the storage content DB 63d, and can provide the storage service to the receiver 20 by the storage service transmission unit 61d. Device. In the present embodiment, the storage service transmission device 60d further generates storage service data ES from the data broadcast material exceeding the predetermined carousel cycle transmitted from the data broadcast generation unit 53d by the storage service transmission unit 61d. Stored in the accumulated data broadcast content DB 62d. The storage service transmission device 60d uses the storage service transmission unit 61d to transmit the storage service data ES stored in the storage data broadcast content DB 62d to the multiplexing device 15 within a predetermined carousel cycle.

  The multiplexing device 15 includes the video ES and audio ES transmitted from the encoding device 11, the broadcast data ES generated by the data broadcast generation device 50d, and the storage service data ES transmitted from the storage service transmission device 60d. Are multiplexed at the transmission bit rate of the assigned band and transmitted to the transmission device 16. Note that the content broadcast data ES transmitted by data broadcasting is transmitted in a carousel configuration with a prescribed carousel cycle.

  The transmitter 16 generates a broadcast wave signal for the multiplexed video ES, audio ES, broadcast data ES, and storage service data ES. As in the example shown in FIG. 14, the broadcast wave signal is sent to the broadcasting station 18 that transmits the broadcast wave so that the receiver 20 can receive the broadcast wave signal.

  In the present embodiment, for example, there are eight data blocks “D1” to “D8” that constitute all data of the data broadcasting content when it is input to the data broadcasting generating device 50d. At this time, for example, as shown in FIG. 12 (A), a normal carousel is defined for the broadcast data ES at a normal transmission bit rate (that is, a transmission bit rate when the transmission bit rate management unit 51d does not perform control). Consider a case where only “D1” to “D6” can be transmitted when transmission is not possible within a period. In this case, when the transmission bit rate management unit 51d determines that the data broadcasting content size is large, VHF-Low band multimedia broadcasting or the like is performed on the data broadcasting material that exceeds a predetermined carousel period among the data broadcasting content. The data broadcast generation unit 53d is controlled to automatically generate the storage service data ES assumed in the above, and the content other than the data broadcast material created as the storage service data ES is transmitted as the broadcast data ES. When the unit 53d is controlled, as shown in FIG. 12B, a prescribed carousel for the data block of the data ES that constitutes all data of the data broadcast content input to the data broadcast generation device 50d It can be transmitted within a period. In addition, similarly to the first embodiment, the transmission bit rate management unit 51d performs processing of reducing image information in the content and reduction according to the priority set for the category constituting the content, Data blocks of data ES reduced by thinning out the data amount of data broadcasting content can be transmitted within a prescribed carousel period. As a result, as shown in FIG. 12C, the receiver 20 can update the receiver even if it is content such as disaster information that is sequentially updated and the content size dynamically changes and may require urgency. On the screen 3000, all the information prepared as data broadcasting content in the stored content reproduction unit 3001 can be reproduced and received as a sufficient broadcasting service.

[Sixth Embodiment]
Next, a data broadcast generation device and a broadcast system according to a sixth embodiment of the present invention will be described. The sixth embodiment according to the present invention can be realized with the same configuration as the data broadcast generation device 50 and the broadcast system 1 of the first embodiment, and will be described with reference to FIGS. 1 and 13. In the first embodiment, the example in which the image reduction determination process, the category reduction determination process, and the video / audio rate reduction determination process are performed when the video and audio output from the camera 10 are multiplexed with the data broadcast has been described. In the sixth embodiment, when the transmission bit rate management unit 51 determines that the content size of the data broadcast increases, the transmission bit rate management unit 51 eliminates the punctuation by changing the color before and after the punctuation for the text information of the data broadcasting content. Thus, it further has a function of instructing the data broadcast generation unit 53 to reduce the content size of the data broadcast content.

  In the present embodiment, for example, there are eight data blocks “D1” to “D8” that constitute all data of the content for data broadcast when it is input to the data broadcast generation device 50. At this time, for example, as shown in FIG. 13 (A), the normal transmission bit rate of the broadcast data ES (that is, the transmission bit rate when control by the transmission bit rate management unit 51 is not performed) is a prescribed carousel. Consider a case where only “D1” to “D6” can be transmitted when transmission is not possible within a period. In this case, when the transmission bit rate management unit 51 determines that the data broadcasting content size is large, the text information of the data broadcasting content is changed by changing the color before and after the punctuation marks, thereby eliminating the data. When the data broadcast generation unit 53 is controlled so as to reduce the content size of the broadcast content, as shown in FIG. 13B, all of the data broadcast content input to the data broadcast generation device 50 is displayed. Data blocks of data ES constituting the data can be transmitted within a prescribed carousel period. In addition, similarly to the first embodiment, the transmission bit rate management unit 51 performs processing of reducing image information in the content and reduction according to the priority set for the category constituting the content, Data blocks of data ES reduced by thinning out the data amount of data broadcasting content can be transmitted within a prescribed carousel period. As a result, as shown in FIG. 13C, the receiver 20 can display a moving image even if it is content such as disaster information that is sequentially updated and the content size dynamically changes and may require urgency. All information prepared as data broadcasting content is reproduced in a manner that does not involve difficulty in information discrimination even as text information with no punctuation marks, on receiver screen 4000 including unit 4001 and data broadcast display unit 4002. Can be received as a sufficient broadcasting service.

  In addition, a normal computer can be used as a hardware configuration of the data broadcast generation device of each embodiment according to the present invention. The data broadcast generation device of each embodiment is configured by a computer including a volatile storage medium such as a CPU and a RAM, a non-volatile storage medium such as a ROM, an interface, and the like. Each function of the control unit included in the data broadcast generation device of each embodiment is realized by causing the CPU to execute a program describing these functions. In other words, the CPU can read out and execute the program stored in the storage medium, thereby causing the computer to function as the data broadcast generation device of each embodiment. The program can also be stored and distributed in a storage medium such as a magnetic disk, an optical disk, or a semiconductor memory.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, it can be set as the further embodiment in the aspect which combined at least 2 or more among 1st Embodiment-6th Embodiment.

  According to the present invention, the content for data broadcasting whose data amount dynamically changes can be transmitted without exceeding the upper limit of the transmission cycle (the predetermined carousel cycle), so that the content size is dynamically updated and the content size is dynamically changed. In addition, it is useful for providing contents such as disaster information that may be urgent.

1, 1a, 1b, 1c, 1d Broadcast system 10 Camera 11 Encoding device 12 Data broadcast generation device 13 Communication server 14 Communication data DB
15 Multiplexer 16 Transmitter 17 Network 18 Broadcasting Station 19 Wireless Communication Device 20 Receiver 21 Movie File DB
22 Video transmission device 50, 50a, 50b, 50c, 50d Data broadcast generation device 51, 51a, 51b, 51c, 51d Transmission bit rate management unit 52, 52a, 52b, 52c, 52d Content input unit 53, 53a, 53b, 53c , 53d Data broadcast generation unit 54c Data broadcast video generation unit 55c Data broadcast video switching unit 60d Storage service transmission device 61d Storage service transmission unit 62d Storage data broadcast content DB
63d Stored content DB
100 Broadcast System 111 Video Encoder 112 Audio Encoder 121 Content Input Unit 122 Data Broadcast Generation Unit 221 High Rate Video Extraction Unit 222 Low Rate Video Extraction Unit

Claims (12)

A data broadcast generation device that generates broadcast data ES for multiplexing and transmitting video ES and audio ES for data broadcast content,
The data broadcasting content is configured to be a data group of a category having a predetermined priority that can be classified by at least one of image information and text information.
A data broadcast generation unit that generates broadcast data ES in data blocks within a prescribed carousel period;
Deriving a transmission bit rate for transmission by data broadcasting from the content size of the input data broadcasting content, and when the derived transmission bit rate exceeds a predetermined threshold, image information in the data broadcasting content Image reduction determination processing for reducing the content size by deleting the category, category reduction determination processing for reducing the content size by reducing the category in the data broadcasting content according to the priority, and video ES and / or Alternatively, at least one of video / audio rate reduction determination processing for extending the transmission bit rate of data broadcasting by lowering the transmission bit rate of audio ES or eliminating transmission of at least one of video ES and audio ES Execute the above to release the data within the specified carousel period. And transmission bit rate control section for controlling the generation of the broadcast data ES in the data broadcast generating unit to transmit the use content,
A data broadcast generating device comprising:   The transmission bit rate management unit includes a video ES and an audio ES of a moving image file having a low transmission bit rate among the two types of moving image files prepared in advance having different transmission bit rates for the same content to be transmitted by the video ES and the audio ES. 2. The apparatus of claim 1, further comprising means for controlling generation of broadcast data ES in the data broadcast generation unit so as to extend a transmission bit rate of data broadcast from a transmission capacity when multiplexing data. Data broadcasting generator.   The transmission bit rate management unit provides a low priority frame data ES and a high priority frame data ES for the data ES when the derived transmission bit rate exceeds a predetermined threshold, and the priority in the data broadcasting content Is set to the high priority frame data ES, and the low priority category data in the data broadcasting content is set to the low priority frame data ES, so that the low priority frame data having a low priority is set. And further comprising means for controlling generation of the broadcast data ES in the data broadcast generation unit so as to lower the transmission bit rate of the ES and to increase the transmission bit rate of the high priority frame data ES having a high priority. The data broadcast generation device according to claim 1 or 2.   The transmission bit rate management unit, when the derived transmission bit rate exceeds a predetermined threshold, the image information in the data broadcasting content for the data broadcasting for the data broadcasting content exceeding a predetermined carousel period. In order to generate a data broadcast video in which the text information is voiced and generate a video ES and audio ES of the data broadcast video as the multiplexed video ES and audio ES The data broadcast generation device according to any one of claims 1 to 3, further comprising means for transmitting data broadcast material exceeding the carousel period from the data broadcast generation unit.   When the derived transmission bit rate exceeds a predetermined threshold, the transmission bit rate management unit stores a storage service in a predetermined storage service for data broadcasting material that exceeds a predetermined carousel period in the data broadcasting content. The data broadcast generation according to any one of claims 1 to 4, further comprising means for controlling generation of broadcast data ES in the data broadcast generation unit as the data ES for storage. apparatus.   6. The transmission bit rate management unit according to claim 1, further comprising means for reducing a content size by removing punctuation marks from the text information in the data broadcasting content. 6. The data broadcast generation device described. A data broadcast generation device that generates broadcast data ES for multiplexing and transmitting video ES and audio ES for data broadcast content,
The data broadcasting content is configured to be a data group of a category having a predetermined priority that can be classified by at least one of image information and text information.
A data broadcast generation unit that generates broadcast data ES in data blocks within a prescribed carousel period;
A transmission bit rate for transmission by data broadcasting is derived from the content size of the input data broadcasting content, and when the derived transmission bit rate exceeds a predetermined threshold, the low priority frame data ES for the data ES And high-priority frame data ES are set, the high-priority category data in the data broadcasting content is set as the high-priority frame data ES, and the low-priority category data in the data broadcasting content is set low. The data broadcast generation unit which is set in the priority frame data ES, lowers the transmission bit rate of the low priority frame data ES having a low priority, and increases the transmission bit rate of the high priority frame data ES having a high priority. A transmission bit rate management unit for controlling generation of broadcasting data ES in
A data broadcast generating device comprising: A data broadcast generation device that generates broadcast data ES for multiplexing and transmitting video ES and audio ES for data broadcast content,
The data broadcasting content is configured to be a data group of a category having a predetermined priority that can be classified by at least one of image information and text information.
A data broadcast generation unit that generates broadcast data ES in data blocks within a prescribed carousel period;
A transmission bit rate for transmission by data broadcasting is derived from the content size of the input data broadcasting content. When the derived transmission bit rate exceeds a predetermined threshold, a predetermined value of the data broadcasting content is determined. A transmission bit rate management unit for sending data broadcast material exceeding the carousel cycle from the data broadcast generation unit;
For the data broadcast of the data broadcast content that exceeds a predetermined carousel cycle, the image information in the data broadcast content is visualized and a data broadcast video in which the text information is voiced is generated, and the data broadcast video A data broadcast video generation unit that transmits the video ES and audio ES of the video ES and audio ES to be multiplexed,
When the derived transmission bit rate exceeds a predetermined threshold, a data broadcast video switching unit that controls transmission of video ES and audio ES of the data broadcast video according to an instruction from the transmission bit rate management unit;
A data broadcast generating device comprising: A broadcasting system that multiplexes and transmits data broadcasting content to video ES and audio ES,
A storage service transmission device for storing and transmitting storage service data ES with a predetermined storage service;
A transmission bit rate for transmission by data broadcasting is derived from the content size of the input data broadcasting content. When the derived transmission bit rate exceeds a predetermined threshold, a predetermined value of the data broadcasting content is determined. A data broadcast generating device that transmits data storage material exceeding the carousel cycle to the storage service transmission device for storage, and generates broadcast data ES in data blocks within a prescribed carousel cycle;
The broadcast data ES transmitted from the data broadcast generation device, the storage service data ES stored by the storage service transmission device, and the video ES and audio ES are multiplexed at the transmission bit rates of the assigned bands, respectively. A multiplexing device,
A transmitter for generating a broadcast wave signal for the multiplexed video ES, audio ES, broadcast data ES, and storage service data ES;
A broadcasting system comprising: A broadcasting system that multiplexes and transmits data broadcasting content to video ES and audio ES,
A video file DB that stores in advance two types of video files with different transmission bit rates for the same content to be transmitted in video ES and audio ES;
A transmission bit rate for transmission by data broadcasting is derived from the content size of the input data broadcasting content, and when the derived transmission bit rate exceeds a predetermined threshold, transmission of the two types of video files is performed. Data broadcasting that generates data ES for broadcasting with data blocks within a prescribed carousel period by expanding the transmission bit rate of data broadcasting from the transmission capacity when multiplexing video ES and audio ES of a video file with a low bit rate A generating device;
A video sending device that outputs video ES and audio ES of a video file having a low transmission bit rate among the two types of video files when the derived transmission bit rate exceeds a predetermined threshold;
A multiplexing device that multiplexes the video ES and audio ES transmitted from the moving image transmission device and the broadcast data ES generated by the data broadcast generation device at a transmission bit rate of an assigned band;
A transmitter for generating a broadcast wave signal for the multiplexed video ES, audio ES, and broadcast data ES;
A broadcasting system comprising: A broadcasting system that multiplexes and transmits data broadcasting content to video ES and audio ES,
A storage service transmission device for storing and transmitting storage service data ES with a predetermined storage service;
A transmission bit rate for transmission by data broadcasting is derived from the content size of the input data broadcasting content. When the derived transmission bit rate exceeds a predetermined threshold, a predetermined value of the data broadcasting content is determined. A data broadcast generating device that transmits data storage material exceeding the carousel cycle to the storage service transmission device for storage, and generates broadcast data ES in data blocks within a prescribed carousel cycle;
The broadcast data ES transmitted from the data broadcast generation device, the storage service data ES stored by the storage service transmission device, and the video ES and audio ES are multiplexed at the transmission bit rates of the assigned bands, respectively. A multiplexing device,
A transmitter for generating a broadcast wave signal for the multiplexed video ES, audio ES, broadcast data ES, and storage service data ES;
A broadcasting system comprising: For data broadcast content, a computer configured as a data broadcast generation device that generates broadcast data ES for multiplexing and transmitting to video ES and audio ES,
The data broadcasting content is configured to be a data group of a category having a predetermined priority that can be classified by at least one of image information and text information.
Generating broadcast data ES with data blocks within a prescribed carousel period;
Deriving a transmission bit rate for transmission by data broadcasting from the content size of the input data broadcasting content, and when the derived transmission bit rate exceeds a predetermined threshold, image information in the data broadcasting content Image reduction determination processing for reducing the content size by deleting the category, category reduction determination processing for reducing the content size by reducing the category in the data broadcasting content according to the priority, and video ES and / or Alternatively, at least one of video / audio rate reduction determination processing for extending the transmission bit rate of data broadcasting by lowering the transmission bit rate of audio ES or eliminating transmission of at least one of video ES and audio ES Execute the above to block data within the specified carousel period. And controlling the generation of the broadcast data ES to transmit the data broadcast content in,
A program for running