JP3670919B2 - Program information sending apparatus and program information sending method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a program information transmission apparatus and program information transmission method for transmitting program information in digital broadcasting or the like.
[0002]
[Prior art]
In digital broadcasting, information about programs to be broadcast, for example, program information such as performers and synopsis (information corresponding to the television program column of newspapers) is sent to provide services to viewers. Since it is desirable that the viewer can watch the program information whenever necessary, the program information is repeatedly transmitted according to a certain period.
[0003]
This allows the viewer to obtain information about the program whenever needed, and thereby select the program he wants to watch.
[0004]
[Problems to be solved by the invention]
By the way, the conventional program information sending device, when new program information is created for updating due to an extension of baseball broadcast or the like, sends the program information before updating as usual within the created cycle. In the next cycle, new program information after update is transmitted. FIG. 8 shows an example of transmission of program information when program information is updated in a conventional program information transmission apparatus. As shown in the figure, when program information is updated, that is, new program information is created at time t1, the unsent portion of the old program information A is normally transmitted in the remaining time Δt within the period TA. Sent out. Then, after the period TA has elapsed, the new program information B is sent out in the period TB for new program information. Therefore, the time TS from when the update occurs until the new program information after the update is sent is TB + Δt. Here, when there is an update near the end in the cycle, TS becomes almost equal to TB, but when there is an update near the beginning in the cycle, TS becomes a value close to TA + TB. Originally, if the periods TA and TB are short, the TS is short and does not cause a problem. However, in practice, a period of several minutes may be used, and in such a case, the TS also takes a long time of several minutes.
[0005]
In this way, when it takes a long time to send the updated program information, the program information updated on the receiving device side cannot be obtained quickly, and the program and program information that are actually broadcasted A period in which the content indicated by “” does not match for a long time is generated, resulting in confusion for the viewer.
Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a program information transmitting apparatus and a program information transmitting method for quickly transmitting updated program information when updating program information. And
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a program information transmitting apparatus for periodically transmitting program information composed of a plurality of pieces of partial information, a means for receiving input of new program information, and detecting the input Means for identifying an unsent amount of current program information within a period at the time when the input is detected, and the unsent amount of partial information that is a component of new program information. Means for specifying partial information having the following data amount; means for transmitting the specified partial information within a period in which an input is detected; and the specified part in a period subsequent to a period in which the input is detected. Means for transmitting the specified partial information after transmitting the partial information other than the information.
[0007]
The present invention is also a program information transmitting apparatus for periodically and repeatedly transmitting program information composed of a plurality of sections, and accepts a means for generating a plurality of packets from the program information and input of new program information. Means, means for detecting the input, means for sending all unsent packets belonging to the section being sent at the time when the input was detected, within the period in which the input was detected, and input detected Means for specifying the total number of untransmitted sections among sections constituting the current program information within the period at the time, and the number of packets equal to or less than the total number of packets among sections constituting new program information A section specifying means for specifying one or two or more sections having the same, and belonging to the specified section within a period in which an input is detected Means for sending a packet, and means for sending a packet belonging to a section other than the specified section in a period following the period in which an input is detected, and then sending a packet belonging to the specified section. Prepare.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, when new program information is created for updating, a function of transmitting a part of new program information instead of continuously transmitting the rest of the old program information within the cycle is provided. The present invention relates to a program information transmission apparatus provided.
(Positioning of the program information transmission device within the broadcast transmission system)
FIG. 1 is a diagram showing the positioning of the program information transmission apparatus according to the embodiment of the present invention in the entire broadcast transmission system. The broadcast transmission system 200 includes a program creation device 201, a program information transmission device 100, a program information transmission device 100, a video / audio transmission device 202, and a TS multiplexing device 203.
[0009]
The program creation device 201 creates video, audio, and program information constituting the program.
The program information sending apparatus 100 converts the program information into transport stream packets (hereinafter referred to as TS packets), adjusts the sending order of TS packets, and sends them to the TS multiplexing apparatus 203.
The video / audio transmission device 202 converts the video / audio information into a TS packet and transmits the TS packet to the TS multiplexing device 203.
[0010]
The TS multiplexer 203 multiplexes and transmits the TS packet of program information and the TS packet of video / audio information.
(Configuration of program information device)
FIG. 2 is a block diagram showing the configuration of the program information sending apparatus according to the present embodiment. As shown in the figure, the program information sending device 100 includes a program information storage unit 101, a period information storage unit 120, a timer management unit 130, a TS packet processing unit 102, a TS packet buffer 103, and data registration. , 104, transmission queue buffer 105, transmission queue information storage unit 106, data read control unit 109, data management unit 125, update-time read control unit 126, and transmission unit 110.
[0011]
The program information storage unit 101 and the cycle information storage unit 120 store information created by the program creation device 201.
The program information storage unit 101 stores one or more pieces of program information created by the program creation device 201. FIG. 3 is a diagram illustrating an example of program information. As shown in the figure, the program information indicates the start time 301, the broadcast time 302, the size 303, and the program content 304 regarding the program to be broadcast. The program information A and the program information B in the figure respectively indicate old program information before update and new program information after update described in this embodiment. The program information is divided into units called sections based on the MPEG standard and stored in the program information storage unit 101. Here, the section division is performed so as to satisfy the condition that the data length of one section does not exceed a certain length.
[0012]
The cycle information storage unit 120 stores the cycle of program information. The period of the old program information A before update is stored as TA, and the period of the new program information B after update is stored as TB.
The timer management unit 130 sends an execution instruction to the data registration unit 104 for each cycle stored in the cycle information storage unit 120.
[0013]
The TS packet processing unit 102 receives a program information update notification from the program creation device 201, creates a TS packet from the new program information in the program information storage unit 101, and stores it in the TS packet buffer 103. At this time, the TS packet processing unit 102 arranges the aforementioned section in a bay load in one or more TS packets. Here, the significance of a section will be briefly described. In the receiving apparatus, when a packet belonging to another section is inserted into a plurality of packets belonging to one section and transmitted, the received packet is also received from the received packet. That is, the program information before TS packet conversion cannot be constructed. Therefore, on the transmission device side, packets belonging to one section are always forced to be sent continuously, and this restriction affects the processing described later.
[0014]
A TS packet group created from one piece of program information by the TS packet processing unit 102 is called a table. A TS packet group created from the program information A is called Table A, and a TS packet group created from the program information B is called Table B.
The TS packet buffer 103 includes a first TS packet buffer 121 and a second TS packet buffer 122. Each buffer stores a TS packet group constituting one of the old and new tables, a version number indicating a version, a period, and a flag.
[0015]
FIG. 4A shows information stored in the first TS packet buffer 121. The first TS packet buffer 121 stores a TS packet group constituting Table A, a version number, a flag, and a cycle. Here, the delimiter in the figure indicates a group of packets, that is, a section. A1 [1] to A1 [4] in the figure show four packets that make up section A1. From the figure, the TS packet group constituting Table A is classified into four sections A1, A2, A3, and A4, and each section is composed of four packets.
[0016]
FIG. 4B shows information stored in the second TS packet buffer 122. From the figure, it is assumed that the TS packet group constituting Table B is classified into five sections B1, B2, B3, B4, and B5, and each section is composed of four packets.
The version number, the period, and the flag are written together when the TS packet processing unit 102 writes the TS packet.
[0017]
The flag shown in FIG. 4A or 4B is set to ON or OFF, and the TS packet buffer whose flag is set to ON stores information on the new table. . Since these figures show the state at the time of update, the flag of the second TS packet buffer storing Table B is set to ON. This flag is referred to and rewritten by the TS packet processing unit 102 and the data registration unit 104. That is, the TS packet processing unit 102 writes the newly created TS packet to the TS packet buffer with the flag turned off, and switches the flag on and off. Further, the data registration unit 104 registers the pointer of the TS packet in the TS packet buffer whose flag is on in the transmission queue buffer 105.
[0018]
In response to an instruction from the timer management unit 130, the data registration unit 104 writes the pointer of the TS packet in the TS packet buffer whose flag is turned on to the transmission queue buffer 105 for each cycle.
The transmission queue buffer 105 stores a TS packet pointer. The pointer of this TS packet disappears when read by the data read control unit 109.
[0019]
The data management unit 125 checks the flag change, that is, the update of the program information at regular intervals shorter than the cycle, and when the flag change is detected, notifies the data read control unit 109 that the flag has been changed. At the same time, the information in the packet buffer whose flag is changed to ON is registered in the table information storage unit 106 as table information.
[0020]
The table information storage unit 106 stores table information in the first TS packet buffer 121 and the second TS packet buffer 122. FIG. 5 shows an example of table information stored in the table information storage unit 106. The table information includes information indicating the period, version, section transmission order, and number of packets in the section for each table. Here, when the table information is newly created by the data management unit 125, the section sending order is set by default, that is, the first section is set in order, but this default setting is changed by processing to be described later. Is done.
[0021]
The data read control unit 109 selects a section and a packet in the section in accordance with the transmission order in the table information storage unit 106, reads the pointer of the selected packet from the transmission queue buffer 105, and based on the pointer, the TS packet TS packets are read from the buffer 103 at a constant speed and output to the sending unit 110. In addition, when the data read control unit 109 receives a flag change notification from the data management unit 125, the data read control unit 109 reads all the packets in the section that is being read, and then transfers the processing to the update-time read control unit 126, and reads the update time Reading from the transmission queue buffer 105 is stopped until the processing unit 126 notifies the processing end.
[0022]
When receiving the transfer of processing from the data read control unit 109, the update-time read control unit 126 refers to the table information storage unit 106, identifies an unsent section of the old version of the Table, and determines the number of packets in the section. Calculate the total of Then, the update-time read control unit 126 selects one or two or more sections in which the total number of packets is equal to or less than the total value and the maximum from the sections of the new version of the table. Then, the update-time read control unit 126 directly reads the TS packet of the selected section from the TS packet buffer 103 at a constant speed, and outputs it to the transmission unit 110. Here, the TS packet read speed is the same as the TS packet read speed by the above-described data read control unit 109 in order to prevent bandwidth overflow.
[0023]
Further, the update-time read control unit 126 determines the transmission order of the sections to be transmitted before the selected section other than the selected section in the next cycle in which the update is detected. The order is written in the table information storage unit 106. Then, the update-time read control unit 126 sends a process end notification to the data read control unit 109 when these processes are completed.
[0024]
The sending unit 110 outputs the TS packets sent from the data read control unit 109 and the update read control unit 126 to the TS multiplexer 203.
(Processing when updating)
Next, the processing operation when updating program information will be described. FIG. 6 is a flowchart showing an operation procedure when program information is updated.
[0025]
First, the data management unit 125 checks whether the flag is changed in the TS packet buffer 103 at regular time intervals. If the flag has been changed, the data management unit 125 writes the table information in the table information storage unit 106. At this time, the transmission order in the table information is written in a default value, that is, in an order starting from the first section. In addition, the data management unit 125 notifies the data read control unit 109 of the flag change (steps S601 and S602).
[0026]
Next, the data read control unit 109 refers to the table information storage unit 106 to check whether or not the latest selected packet is located in the middle of the section. If the data read control unit 109 is in the middle of a section, the data read control unit 109 selects the packet of the section, reads the pointer of the packet from the transmission queue buffer 105, and reads the target packet from the TS packet buffer 103 based on the pointer. The packet is read and output to the sending unit 110. The data read control unit 109 does not perform these processes when not in the middle of a section (steps S603 and S604).
[0027]
Next, the data read control unit 126 refers to the table information storage unit 106 to check whether there is a section that has not been transmitted in the current cycle in the currently transmitted table. If there is an unsent section, the data read control unit 126 empties the sending queue buffer 105 and stops the processing. Then, the process is transferred to the update-time read control unit 126 (steps S605 and S606).
[0028]
The update-time read control unit 126 calculates the total number of packets in the unsent section (step S607).
Next, the update-time read control unit 126 refers to the table information storage unit 106, and a section (one or a plurality) having a packet less than the total value of the calculated number of packets is included in the section of the new table. Check if it exists. If the sections exist, the packets of these sections are selected, the packets are read from the TS packet buffer 103, and output to the sending unit 110. If the section does not exist, no packet is transmitted (steps S608 and S609).
[0029]
Next, the update-time read control unit 126 determines the sending order so that the sending order of other sections other than the section selected as described above comes first, and writes the order in the table information storage unit 106 (step S610).
Then, the update-time read control unit 126 transfers the process to the data read control unit 109 (step S611).
[0030]
The data read control unit 109 refers to the table information storage unit 106, selects the packet with the latest version of the table based on the transmission order, reads the pointer of the packet from the transmission queue buffer 105, and sets the pointer to the pointer. Based on this, the TS packet is read from the TS packet buffer 103 and output to the sending unit 110 (step S612).
[0031]
Thereafter, the data read control unit 109 repeats the process of step S612 until the program information is updated.
(Concrete example)
Next, the above operation will be described using a specific example.
FIG. 7 is a diagram for explaining an example of a packet transmission order.
[0032]
FIG. 7A shows the transmission order of sections in two cycles of old program information (Table A) and one cycle of new program information (Table B). It is assumed that an update is detected at time t1.
FIG. 7B shows the packet transmission order within the period before the update. As shown in the figure, each of four packets belonging to sections A1 to A4 is transmitted within a period TA.
[0033]
FIG. 7B shows the packet transmission order within the period in which the update occurs. As shown in FIG. Assume that an update has been detected after 13 packets (the third packet belonging to the A3 section) have been transmitted. In this case, since two unsent packets remain in the A3 section, these packets are sent (Nos. 14 and 15).
[0034]
Next, since the number of packets of A4 which is an unsent section is 5, when a section having a packet number of 5 or less and a packet number close to 5 is searched from the sections of the new Table B, sections B1 to B5 are The condition is satisfied by the number of packets 4, but any one of them is selected. Here, section B5 is selected, and four packets belonging to section B5 are transmitted.
[0035]
FIG. 7C shows the packet transmission order within the updated period. Since section B5 is transmitted within the previous period TA, the transmission order is postponed in the current period TB. That is, as shown in the figure, section B5 is sent at the end of period TB, and other sections B1 to B4 are sent before B5. The sending order of B1 to B4 may be arbitrary, but here it is assumed that sending is performed in the order of B1, B2, B3, and B4.
[0036]
Thereafter, according to this order (B1, B2, B3, B4, B5), Table B packets are repeatedly sent periodically.
As described above, in the conventional program information transmission apparatus, when the update occurs at time t1, all the new program information has not been transmitted until the packet of the B5 section is transmitted in the next period TB. In the program information transmitting apparatus according to the present embodiment, in the next period TB, when new B4 section packets are transmitted, all new program information has been transmitted.
(Summary)
As described above, according to the program information sending device according to the present invention, when program information is updated, the program information is updated within a period that does not exceed the amount of data that should have been sent if the update did not occur. Since the program information is updated and the updated program information is sent after the part sent in the previous cycle is postponed in the next cycle, it is updated at a time earlier than the end of the next cycle. All program information can be sent out. Therefore, on the receiving device side, the updated program information can be quickly acquired, and a situation in which the program information and the actual program content are inconsistent can be prevented.
(Modification)
As mentioned above, although embodiment of the program information transmission apparatus concerning this invention was described, of course, this invention is not limited to said embodiment. That is, the following modifications are of course included in the present invention.
(1) Selection of packets to be sent within the period when update is detected
In the present embodiment, as the section to be sent instead of the old table unsent section within the period in which the update is detected, the total number of packets in the old table unsent section from the new table section is less than the total value. However, one or more sections having the largest number of packets are selected, but the present invention is not limited to this. The following section selection method may be used. Here, it is assumed that the new table is TableC, and TableC is composed of C1 to C5 sections.
(A) Method for selecting in the next cycle while maintaining the section order
That is, in the next cycle, the data are sent in order from C1 to C5. Therefore, in the section to be transmitted within the cycle in which the update is detected, the total number of packets of the selected section is the sum of the number of packets of the unsent section of the old table in order starting from C5 which is sent latest in the next cycle. Select under conditions that do not exceed.
[0037]
For example, if the total number of packets in the unsent section of the old table is 12, the number of C5 packets is 5, the number of C4 packets is 4, and the number of C3 packets is 5, then C5 and C4 are Selected. Then, within the cycle in which the update is detected, the data is sent in the order of (C4, C5) or (C5, C4), and the sending order of the next cycle is the order of (C1, C2, C3, C4, C5). .
(B) Method for selecting while maintaining the order of sections over adjacent periods
That is, in the next period, it is not always necessary to start from C1, but the section order is selected to be continuous over adjacent periods.
[0038]
For example, if the total number of packets in the unsent section is 12, the total number of C2 and C4 packets is 10, and the total number of C2 and C3 packets is 5, priority is given to continuity between sections. Then, C2 and C3 are selected. Then, (C2, C3) is sent within the cycle in which the update is detected, and the sending order of the next cycle is set to be continuous (C4, C5, C1, C2, C3).
(C) Selecting a section by other simple processing
For example, if it is a section having a packet that is less than the total number of packets in the unsent section of the old table, it may be arbitrarily selected even if it is not the maximum, or less than the total value of the number of packets in the unsent section of the old table. Even if it is not the number of packets, it may be selected as long as it is a section having the number of packets approximate to it.
(2) Sending in the following and subsequent cycles after the updated cycle
In the present embodiment, the section of the new table is transmitted according to the determined transmission order in the period after the period in which the update is performed. However, the present invention is not limited to this. For example, in the next cycle in which the update is performed, the data is transmitted in the determined order. However, after the next cycle, the data may be transmitted in order from the first section as usual.
(3) Packet transmission timing
In this embodiment, the data read control unit 109 and the update-time read control unit 126 transmit packets at a constant and constant speed, but the present invention is not limited to this. For example, the data read control unit 109 may transmit all packets in the first half of the cycle. In this way, when packets are not sent at a constant rate within the cycle, if the packet sending timing at the time of updating is determined without considering the sending timing of the packet before updating, it will be maintained until then. This may result in using a bandwidth that is higher than the program information transmission bandwidth. Therefore, in order to enable the packet transmission at the time of update to be performed at the same timing as the packet transmission at the normal time, the data read control unit 109 sets the packet transmission timing to be transmitted if there is no update at the time of update. The read control unit 126 is notified, and the update-time read control unit 126 can transmit a new table packet based on this timing within the update cycle.
(4) Updating program information for multiple channels
In the present embodiment, the presence of a plurality of channels is not particularly mentioned, but the program information transmitting apparatus according to the present embodiment can be applied to program information for a plurality of channels. In addition, since the update of program information in a plurality of channels is normally performed in units of channels, the update processing described in the present embodiment is performed only on the section (packet) corresponding to the channel to be updated. It is good.
(5) Transmission queue buffer 105
In the present embodiment, the transmission queue buffer 105 records the pointer of the TS packet. However, the present invention is not limited to this, and the TS packet body may be stored. In this case, the data read control unit 109 may extract the TS packet directly from the transmission queue buffer 105 and send it to the transmission unit 110.
(6) About the PSI table of another PID
In this embodiment, adjustment of transmission of program information (a specific PID is assigned) has been described, but it is needless to say that the present invention can also be applied to tables that are periodically transmitted to which another PID is assigned.
[0039]
【The invention's effect】
As is clear from the above description, a program information transmitting apparatus for periodically and repeatedly transmitting program information composed of a plurality of pieces of partial information, means for receiving input of new program information, means for detecting the input, , Means for specifying an unsent amount in the current program information within a period at the time when the input is detected, and data less than the unsent amount in the partial information which is a component of the new program information Means for identifying partial information having a quantity; means for transmitting the specified partial information within a period in which an input is detected; and other than the specified partial information in a period following the period in which the input is detected. And means for sending the specified partial information after sending the other partial information.
[0040]
Thus, when the input of new program information is detected, a part of the new program information having a data amount corresponding to the unsent amount of the current program information within the detected period is transmitted, and the next period In sending new program information, since the part other than the sent part is sent first, the new program information can be sent quickly when the program information is updated.
[0041]
The present invention is also a program information transmitting apparatus for periodically and repeatedly transmitting program information composed of a plurality of sections, and accepts a means for generating a plurality of packets from the program information and input of new program information. Means, means for detecting the input, means for sending all unsent packets belonging to the section being sent at the time when the input was detected, within the period in which the input was detected, and input detected Means for specifying the total number of untransmitted sections among sections constituting the current program information within the period at the time, and the number of packets equal to or less than the total number of packets among sections constituting new program information A section specifying means for specifying one or two or more sections having the same, and belonging to the specified section within a period in which an input is detected Means for sending a packet, and means for sending a packet belonging to a section other than the specified section in a period following the period in which an input is detected, and then sending a packet belonging to the specified section. It is characterized by having.
[0042]
As a result, when an input of new program information is detected, if there is a section that is in the process of being transmitted within the detected period among the sections constituting the current program information, this section is detected within the detected period. After all the packets included in the program are transmitted, the packets of the section having the number of packets equal to or less than the total number of packets of the untransmitted section of the new program information among the sections constituting the new program information are transmitted, and the next In the transmission of new program information with a period of, the program information is transmitted from a section other than the transmitted section. Therefore, new program information can be quickly transmitted when updating the program information, and the packet is transmitted while keeping the section break, so that the normal program information can be obtained from the packet received by the receiving device. Can be built.
[0043]
In addition, if there is no packet of a section having a packet number equal to or less than the total number of packets of the unsent section of the current program information in the sections constituting the new program information, the new program information is updated within the period when the input is detected. Since no program information packets are sent, the effect of sending program information quickly is not obtained. Will be used.
[0044]
Here, the section specifying means specifies one or more sections in which the total number of packets is the largest among the sections constituting new program information.
As a result, the largest number of new program information packets are sent within the period when the input is detected within the range of the number of unsent packets of the current program information. The time until transmission of all the packets constituting the information is shortened, and new program information can be transmitted most quickly when the program information is updated.
[0045]
A program information transmission method for periodically and repeatedly transmitting program information composed of a plurality of pieces of partial information, the step of receiving an input of new program information, the step of detecting the input, and the time when the input is detected A step of identifying an unsent amount in the current program information within a period, and a step of identifying partial information having a data amount equal to or less than the unsent amount in the partial information which is a component of new program information A step of sending the specified partial information within a cycle in which the input is detected, and after sending other partial information other than the specified partial information in a cycle next to the cycle in which the input is detected And sending the specified partial information.
[0046]
Thus, when the input of new program information is detected, a part of the new program information having a data amount corresponding to the unsent amount of the current program information within the detected period is transmitted, and the next period In sending new program information, since the part other than the sent part is sent first, the new program information can be sent quickly when the program information is updated.
[0047]
A program information transmission method for periodically and repeatedly transmitting program information consisting of a plurality of sections, the step of generating a plurality of packets from the program information, the step of receiving input of new program information, and the input A step of detecting, a step of transmitting all unsent packets belonging to the section being transmitted at the time when the input is detected, within a cycle in which the input is detected, and a cycle in which the input is detected A step of specifying the total number of untransmitted sections in the sections constituting the current program information, and one or two or more having the number of packets less than the total number of packets in the sections constituting the new program information A step of identifying a section of the packet, and a packet belonging to the identified section within the period in which the input is detected. And a step of transmitting a packet belonging to a section other than the specified section and then transmitting a packet belonging to the specified section in a period next to a period in which an input is detected. It is characterized by that.
[0048]
As a result, when an input of new program information is detected, if there is a section that is in the process of being transmitted within the detected period among the sections constituting the current program information, this section is detected within the detected period. After sending all the packets included in the new program information, send the packets of the section having the number of packets less than the total number of unsent sections of the current program information among the sections constituting the new program information. In transmitting new program information with a cycle, the program information is transmitted from a section other than the transmitted section. Therefore, new program information can be quickly transmitted when updating the program information, and the packet is transmitted while keeping the section break, so that the normal program information can be obtained from the packet received by the receiving device. Can be built.
[0049]
As described above, according to the present invention, it is possible to quickly provide highly reliable program information to the viewer, so that the use of digital broadcasting is convenient and its practical effect is extremely large.
[Brief description of the drawings]
FIG. 1 shows the positioning of a program information transmission apparatus according to an embodiment of the present invention in the entire broadcast transmission system.
FIG. 2 is a block diagram showing a configuration of a program information sending apparatus according to the present embodiment.
FIG. 3 is a diagram showing an example of program information.
4 (a) shows information stored in the first TS packet buffer 121, and FIG. 4 (b) shows information stored in the second TS packet buffer 122. FIG.
5 shows an example of table information stored in a table information storage unit 106. FIG.
FIG. 6 is a flowchart showing an operation procedure when program information is updated.
FIG. 7 is a diagram illustrating an example of a packet transmission order.
FIG. 8 shows an example of transmission of program information when program information is updated in a conventional program information apparatus.
[Explanation of symbols]
100 Program information sending device
101 Program information storage unit
102 TS packet processor
103 TS packet buffer
104 Data registration part
105 Outgoing queue buffer
106 Table information storage unit
109 Data read control unit
110 Sending unit
120 Period information storage unit
121 First TS packet buffer
122 Second TS packet buffer
125 Data Management Department
126 Update control unit during update
130 Timer Manager
200 Broadcast transmission system
201 Program creation device
202 Video / audio transmission device
203 TS multiplexer
301 Start time
302 broadcast time
303 size
304 Program contents

Claims (5)

A program information sending device for repeatedly sending program information comprising a plurality of pieces of partial information at a predetermined cycle ,
Means for accepting input of new program information;
Means for detecting the input;
Means for identifying an untransmitted amount of current program information within a period at the time when the input is detected;
Means for identifying partial information having a data amount equal to or less than the untransmitted amount of partial information that is a component of new program information;
Means for transmitting the specified partial information within a period in which an input is detected;
Means for transmitting the specified partial information after the partial information other than the specified partial information is transmitted in a period subsequent to the period in which the input is detected. apparatus. A program information sending device for repeatedly sending program information consisting of a plurality of sections at a predetermined cycle ,
Means for generating a plurality of packets from program information;
Means for accepting input of new program information;
Means for detecting the input;
Means for transmitting all unsent packets belonging to the section being transmitted at the time when the input is detected within a period in which the input is detected;
Means for specifying the total number of packets of unsent sections of sections constituting the current program information within a period at the time when input is detected;
Section specifying means for specifying one or more sections having the number of packets equal to or less than the total number of packets among sections constituting new program information;
Means for sending a packet belonging to the specified section within a period in which an input is detected;
Means for transmitting a packet belonging to another section other than the specified section in a period subsequent to a period in which an input is detected, and then transmitting a packet belonging to the specified section. Program information sending device. 3. The program information transmitting apparatus according to claim 2, wherein the section specifying unit specifies one or more sections having the maximum number of all packets among sections constituting new program information. A program information sending method for repeatedly sending program information comprising a plurality of pieces of partial information at a predetermined cycle ,
Receiving new program information input;
Detecting the input;
Identifying an unsent amount of current program information within a period at the time when the input is detected;
Identifying partial information having a data amount equal to or less than the untransmitted amount of partial information that is a component of new program information;
Sending the specified partial information within a period in which an input is detected;
And a step of transmitting the specified partial information after transmitting other partial information other than the specified partial information in a cycle next to the cycle in which the input is detected. . A program information sending method for repeatedly sending program information consisting of a plurality of sections at a predetermined cycle ,
Generating a plurality of packets from the program information;
Receiving new program information input;
Detecting the input;
Sending all unsent packets belonging to the section being sent out when the input is detected within the period in which the input was detected;
Identifying the total number of untransmitted sections of sections constituting the current program information within a period at the time when input is detected;
Identifying one or more sections having the number of packets equal to or less than the total number of packets among sections constituting new program information;
Sending a packet belonging to the identified section within a period in which an input is detected;
Sending a packet belonging to another section other than the specified section in a period following the period in which the input is detected, and then transmitting a packet belonging to the specified section. Information transmission method.

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