JP2002280985A - Data transmission method and, data transmission/ reception method in digital broadcast, and its system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transmission method that can reduce an information quantity of data transmitted using the carousel system so as to decrease a transmission period of other data, by transmitting data with much information quantity with concentration for a prescribed time (e.g. during televising of a commercial) in the data broadcast, and to provide a data transmission reception method and its system. SOLUTION: A broadcast station side monitors the progress state of a broadcast, and when broadcast program information indicates a CM televising state, the broadcast station switches the carousel system into a stream system and transmits data with much information quantity (database) in concentrated manner. When the transmission of data is completed or the progress state of the broadcast indicates a program televising state, the broadcast station restores the transmission system to the carousel system and transmits data of usual contents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method, a data transmission / reception method, and a system therefor, and more particularly to a data transmission method and a data transmission / reception method for efficiently transmitting data having a large amount of information (for example, a database) in data broadcasting. , And its systems.

[0002]

2. Description of the Related Art With the recent digitization, the practical use of digital broadcasting has been carried out in the broadcasting business, and one service of the digital broadcasting is data broadcasting. This data broadcast is transmitted in a carousel system.
The carousel method is a data transmission method in which data of a plurality of contents are arranged and transmitted like a carousel. According to this method, data of the same content is transmitted every cycle. Further, an instruction for erasing data in a storage area managed by the broadcast station in the storage area of the receiver is added to the data of the plurality of contents. Then, when data of another content is selected and received by the receiver, the data of the selected content is newly stored after deleting the data of the content already stored from the storage area based on the instruction. Store in the area.

[0003] The following is a specific description.

FIG. 15 is a diagram for explaining the prior art. FIG. 16 is a diagram for explaining a memory (a storage area managed by a broadcasting station) of the receiver.

As shown in FIG. 15, content data (data A to data H) is sequentially transmitted from the broadcast station in a carousel system, and content data (data A to data) transmitted in the carousel system is transmitted. H)
Usually, a reset command for erasing content data stored in the memory of the receiver is provided. Here, when the user selects item A displayed on the receiver by remote control operation or the like, as shown in FIG. 16, data A of the content is stored in the memory of the receiver (160).
1) is done. Further, when the user selects item B displayed on the receiver by remote control operation or the like, and receives data B of the content from the broadcasting station, the receiver resets the memory by a reset command included in the data B. After resetting and erasing data A (16002), data B of the content is stored in the memory (1603).

[0006]

However, in the data transmission by the carousel method described above, if the data of the content to be transmitted includes data having a large amount of information, the transmission cycle of other data is delayed. As a result, there is a problem that a long waiting time is given to the viewer.

[0007] In addition, the data of the content described above includes:
Usually, since a reset command for erasing data in the memory of the receiver is included, for example, after receiving large data such as a database as content data, receiving different content data, The database is deleted by the data reset instruction. Therefore, in order to store the database in the memory again, it is necessary to receive the database again, and there is a problem that much time is required.

[0008] Therefore, an object of the present invention is to solve the problem that data of a large amount of information (for example, a database) is stored for a predetermined time (for example, during commercial broadcasting).
It is an object of the present invention to provide a data transmission method, a data transmission / reception method, and a system thereof that can reduce a waiting time until a viewer acquires information by transmitting data in a concentrated manner.

[0009] The problem to be solved by the present invention is as follows.
By transmitting content data with a large amount of information in a predetermined time, the amount of data to be transmitted by the carousel method is reduced, the transmission cycle of other data is shortened, and the viewer acquires information. It is an object of the present invention to provide a data transmission method, a data transmission / reception method, and a system thereof that can reduce a waiting time until the data transmission.

[0010] The problem to be solved by the present invention is:
A data transmission method and a data transmission / reception method capable of preventing content data (database) stored in a memory of a receiver from being erased even after receiving content data transmitted by a carousel method;
And a system thereof.

[0011]

A first aspect of the present invention for achieving the above object is as follows.
The present invention relates to a data transmission method for transmitting content data stored in a storage area managed by a broadcasting station of a receiver in digital data broadcasting, the method comprising: Is stored separately in a first content data group and a second content data group.
Transmitting the content data group in the first transmission method, and from the broadcasting station only within a predetermined time,
Switching to a second transmission method different from the first transmission method, and transmitting the second content data group intensively.

According to a second aspect of the present invention to achieve the above object, in the first aspect, the first transmission system is a carousel system.

[0013] A third invention for achieving the above object is characterized in that, in the first invention, the second transmission method is a stream system.

According to a fourth aspect of the present invention, in the first aspect, the predetermined time is a broadcast time of a commercial.

[0015] In a fifth aspect of the present invention to achieve the above object, in any one of the first to fourth aspects, the data transmission method comprises the steps of:
The method further comprises the step of not adding a command to delete the second content data group stored in the storage area managed by the broadcast station.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the update data for updating a part of the stored second content data group from a broadcast station. At the receiver, and at the receiver, updating the stored second content data group with update data transmitted by the first transmission method. It is characterized by having.

According to a seventh aspect of the present invention, there is provided any one of the first to sixth aspects, wherein an identification number is assigned to predetermined data of the second content data group to be transmitted. Transmitting a control signal including an identification number of the predetermined data when the user wants the predetermined data to be displayed on the receiver; and receiving the control signal on the receiver side and storing the stored second signal. The method includes a step of searching data of an identification number indicated by the control signal from a content data group, and a step of displaying the searched data in a receiver.

According to an eighth aspect of the present invention to achieve the above object, the receiver according to any one of the first to seventh aspects, further comprising: transmitting, at the receiver, data corresponding to the content selected by the user.
Selecting from the stored second content data group,
The method further comprises the step of displaying the selected data.

A ninth invention for achieving the above object is a broadcasting station of a data broadcasting system for transmitting content data stored in a storage area managed by a broadcasting station of a receiver in digital data broadcasting, A first storage unit in which a first content data group is stored, a second storage unit in which a second content data group is stored, and a second storage unit in a case of a predetermined time. Selecting the second content data stored in the first storage device, and selecting the first content data stored in the first storage device when the predetermined time period is not exceeded, And transmitting means for transmitting the content output from.

[0020] A tenth invention for achieving the above object is the ninth invention, wherein the predetermined time is a broadcast time of a commercial.

According to an eleventh invention for achieving the above object, in the ninth or tenth invention, the broadcasting station of the data broadcasting system sequentially stores the first content data stored in the first storage means. It further comprises means for reading and outputting the read content data to the selecting means in a carousel system.

According to a twelfth invention for achieving the above object, in any one of the ninth to eleventh inventions, the broadcasting station of the data broadcasting system, when transmitting the first content data group, The apparatus further comprises means for deleting, from the first content data, an instruction to delete the second content data group already stored in the storage area managed on the side.

According to a thirteenth invention for achieving the above object, in any one of the ninth to twelfth inventions, the second storage means of the broadcasting station of the data broadcasting system stores the second content data group. The data to be displayed on the receiver is stored with the identification number attached thereto, and the control signal generating means includes a means for generating a control signal including the identification number of the data to be displayed on the receiver among the data with the identification number. It is further characterized by having.

According to a fourteenth invention for achieving the above object, in any one of the ninth to thirteenth inventions, the second storage means of the broadcasting station of the data broadcasting system stores the second second content. The data group is stored with an identification number, and when predetermined content data is updated among the second content data with the identification number, the transmission unit transmits the updated content data. It is characterized by being constituted.

According to a fifteenth aspect of the present invention, there is provided a receiver of a data broadcasting system for transmitting content data stored in a storage area managed by a broadcasting station of a receiver in digital data broadcasting, Receiving means for receiving a first content data group, a second content data group, or a control signal transmitted from the broadcast station; storage means for storing the second content data received by the receiving means; A search unit for searching the storage unit for content data having the same identification number as the identification number included in the control signal; and a display unit for displaying the content data searched for by the search unit. .

According to a sixteenth aspect of the present invention, in the fifteenth aspect, the storage means stores a second content data group with an identification number transmitted from the broadcast station side, When receiving the content data with the updated identification number from the side, a search unit that searches the storage unit for content data having the same identification number as the identification number of the updated content data, and Means for replacing the content data with the updated content data.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described.

FIG. 1 and FIG. 2 are diagrams for explaining the present embodiment.

In a normal data broadcast, as shown in FIG.
When transmitting data of data broadcast contents from a broadcasting station to a receiver, a carousel method of sequentially transmitting data of contents arranged in a ring-shaped transmission order is performed. For example, if the data of the content of the data broadcast is composed of data A to data J as shown in FIG. 2, transmission by the carousel method is performed in the order of data A, data B... Data I, and data J. . Also,
The content data transmitted by the carousel method usually includes a command for erasing the content data stored in the memory of the receiver (hereinafter, referred to as a reset command).
Is added. Therefore, the receiver that has received the content data stores the received content data in the memory after resetting the memory (erasing the data).
For example, in the above example, when data A is stored in the memory of the receiver, when data B of another content is received, the receiver erases data A stored in the memory and then stores data B in the memory. Remember.

However, for example, when the information amount of the data B is large, the transmission cycle of other data is delayed, giving a long waiting time to the viewer. Further, if the receiver receives the data C after receiving the data B, the data B is erased by the reset command included in the data C.

Therefore, in the first embodiment, when transmitting data B having a large amount of information, the data system is switched to a stream system different from the carousel system, and the data B is transmitted intensively at a specific time. Is transmitted, no command is added to the data to be transmitted by the carousel method.

Hereinafter, the first embodiment will be described in detail.
In the following description of the first embodiment, a database is used as an example of data having a large information amount. The database may be, for example, a database of the baseball player's lifetime scores, a database of the season hitting scores, a database of the competing team scores, and the like. Further, as an example of the specific time, a broadcast time of a commercial (hereinafter, referred to as a CM) is taken as an example. As an example of the memory of the receiver, R
A volatile memory such as an AM, a nonvolatile memory such as a flash, and the like are conceivable. The amount of information in the database is C
This is the amount of information that can be transmitted during M.

Next, the configuration of the first embodiment will be described.

First, the configuration of the broadcasting station 1 will be described.

FIG. 3 is a block diagram of the broadcasting station 1.

In FIG. 3, reference numeral 100 denotes a storage unit. The storage unit 100 stores data of content to which a reset command is added.

Reference numeral 101 denotes a carousel output unit. The carousel output unit 101 sequentially reads content data from the storage unit 100. And carousel sending unit 1
01, when receiving a control signal instructing to delete the reset command added to the content data from the control unit 106 described later, outputs the content data from which the reset command has been deleted to the selection unit 104 in a carousel system. Is what you do.

Reference numeral 102 denotes a second storage unit. The storage unit 102 stores a database to which a reset command is added and a program for displaying necessary information from the database. Note that examples of the database include menu layout information, still image information, and character information to be displayed on the receiver. As an example of a program for displaying necessary information from a database, BML (Broadcast)
cast Markup Language), B-XM
L (Broadcast-eXtensible Ma)
rkup Language).

Reference numeral 103 denotes an automatic broadcast management system (APS)
It is. The APS 103 determines the current broadcast status (whether a program is being broadcast or a CM is being broadcast) and transmits the determination result to the control unit 106.

Reference numeral 104 denotes a selection unit. This selection unit 104
According to the control signal of the control unit 106, data of the content transmitted by the carousel method or one of the database and the program from the storage unit 102 is selected.

Reference numeral 105 denotes a transmission unit. This transmitting unit 105
Transmits the content data or the database and the program from the selection unit 104 to the receiver.

Reference numeral 106 denotes a control unit. This control unit 106
Transmits a control signal for instructing the selection unit 104 on the data to be selected, based on the information on the broadcast situation from the APS 103. For example, when receiving information indicating that the current broadcast status is that the program is being broadcast, the control unit 104 transmits to the selection unit 104 a control signal instructing to select data of the content output by the carousel output unit 101, and When receiving the information indicating that the broadcast status is CM broadcasting, a control signal instructing to select a database and a program from the storage unit 102 is transmitted to the selection unit 104. After transmitting the data and the program from the storage unit 102, the control unit 106 transmits a control signal instructing to delete the reset instruction added to the data of the content stored in the storage unit 100 by a carousel transmission unit. Send to 101.

Next, the configuration of the receiver will be described.

FIG. 4 is a block diagram of the receiver.

In FIG. 4, reference numeral 201 denotes a receiving unit. The receiving unit 201 receives content data, a database, and a program transmitted from the transmitting unit 105.

Reference numeral 202 denotes a storage unit. This storage unit 202
Stores a database and a program received by the receiving unit 201.

Reference numeral 203 denotes a control unit. This control unit 203
Is for causing the storage unit 202 to store the data of the database, the program, and the content received by the receiving unit 201. Further, when the reset instruction is added to the transmitted data or the database,
The data or database received after erasing the data stored in the storage unit 202 is stored in the storage unit 202.

Next, the operation of the above configuration will be described.

FIG. 5 is a flowchart for explaining the present embodiment.

First, the APS 103 monitors the current broadcast state (Step A1). When the current broadcast state changes from broadcasting a program to broadcasting a CM (Step A2), APS1
03 transmits to the control unit 106 information indicating that the current broadcast status is CM broadcasting (Step A3).

Upon receiving from the APS 103 the information indicating that the current broadcast status is CM broadcasting, the control unit 106 transmits a control signal instructing to select a database and a program from the storage unit 102 to the selection unit 104. (Step A4).

Upon receiving the control signal from the control unit 106, the selection unit 104 selects a database and a program from the storage unit 102 (Step A5). Then, the transmitting unit 105 transmits the selected database and program (Step A6).

When the database and the program transmitted from the transmitting unit 105 are received by the receiving unit 201 (Step Ste)
pA7), the control unit 203 causes the storage unit 202 to store the database and the program received after erasing the data stored in the storage unit 202 based on the reset command added to the database (Step A).
8).

When the transmission of the database and the program is completed, the control unit 106 transmits to the carousel transmission unit 101 a control signal instructing to delete the reset command from the data of the content stored in the storage unit 100.
The curl cell transmission unit 101 deletes the reset command from the content data based on the control signal (St.
epA9). Then, the control unit 106 controls the selection unit 104 to select the data from the carousel transmission unit 101, and transmits the data at a predetermined cycle (Step A1).
0).

In the present embodiment, a specific time is set to CM
It is assumed that the broadcast is being performed, and the data transmitted during the CM is described as a database and a program. For example, the database and the program may be transmitted at a specific time during the broadcast of the program.

Further, in the present embodiment, a configuration has been described in which, after transmitting a database from a broadcasting station, a reset command is deleted from data of content to which a reset command has been previously added, but the present invention is not limited to this case. For example, after transmitting the database from the broadcast station side, the data of the content to which the reset command is not added may be stored in the storage unit 100 again, and the data of the content may be transmitted.

Next, a second embodiment will be described.

In the first embodiment, a case has been described where the database is transmitted intensively at a specific time (during CM). In the second embodiment, when a part of the data of the database described in the first embodiment is updated,
The updated part of the data is transmitted from the broadcasting station to the receiver. Then, the receiver receiving the updated data,
It is characterized in that data of a database stored in a memory (storage unit) is updated to updated data.

More specifically, data of a database to which an identification number is added in advance is transmitted from a broadcasting station to a receiver in a concentrated manner at a specific time as in the first embodiment, and the database is stored in the receiver. It is stored in the memory (storage unit 212).

When updating the data in the database, the data of the database with the identification number to be updated is transmitted from the broadcast station side. The receiver that has received the data of the database searches the memory (storage unit 212) for the data of the database having the same identification number as the identification number assigned to the data of the database. The data is updated to the newly received data of the database.

The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The configuration of the present embodiment will be described.

First, the configuration of the broadcasting station will be described.

FIG. 6 is a block diagram of the broadcasting station 1.

In FIG. 6, reference numeral 122 denotes a storage unit. The storage unit 122 stores database data to which identification numbers are assigned. For example, an identification number is assigned to batting average data of each player in a player's lifetime database.

Reference numeral 120 denotes a second storage unit. When updating the database of the storage unit 122 after transmitting the database of the storage unit 122 to the receiver, the storage unit 120 stores the updated database with the same identification number as the identification number before the update. For example, when the data with the identification number 1 (data of the batting average of the player) is updated,
The storage unit 120 stores the data with the updated identification number 1.

Next, the configuration of the receiver 2 will be described.

FIG. 7 is a block diagram of the receiver.

In FIG. 7, reference numeral 212 denotes a storage unit. The storage unit 212 stores a database transmitted from the broadcasting station 1.

Reference numeral 213 is a control unit. This control unit 213
When the data of the database to be updated is received by the receiving unit 201, the data of the database having the same identification number as the data of the database to be updated is searched from the storage unit 212, and the data of the searched database is Update to the newly received database data.
For example, when updating the data with the identification number 1 (data on the batting average of the player) in the data of the player's lifetime database, the data with the identification number 1 is transmitted from the broadcasting station. Then, the receiving unit 201 receives the data with the identification number, and the control unit 213 searches the storage unit 212 for the data with the same identification number as the identification number 1 attached to the data. The updated data is updated to the newly received data.

Next, the operation of the above configuration will be described.

FIG. 8 is a flowchart for explaining the present embodiment.

First, the APS 103 monitors the current broadcast state (Step B1). When the current broadcast state changes from broadcasting a program to broadcasting a CM (Step B2), APS1
03 transmits to the control unit 106 information indicating that the current broadcast state is CM broadcasting (Step B3).

Upon receiving from the APS 103 the information indicating that the current broadcast status is CM broadcasting, the control unit 106 transmits a control signal instructing to select a database from the storage unit 122 to the selection unit 104 ( StepA
4).

Upon receiving the control signal from control section 106, selection section 104 selects a database and a program from storage section 122 (Step B5). Then, the transmitting unit 105 transmits the selected database (St
epB6).

When the database transmitted from transmitting section 105 is received by receiving section 201 (Step B7), control section 213 deletes the data stored in storage section 212 based on the reset command added to the database. After that, the received database is stored in the storage unit 212 (Step B8).

When the transmission of the database is completed, the control unit 106 transmits a control signal for instructing to delete the reset command added to the data stored in the storage unit 100 to the carousel transmission unit 101. 101 deletes the reset command from the content data based on the control signal (Step B9). Then, the control unit 106 provides the selection unit 104 with the carousel transmission unit 1
Control is performed so as to select data from 01, and the data is transmitted at a predetermined cycle (Step B10).

The operation up to this point is the same as in the first embodiment.

Subsequently, when updating part of the data of the database transmitted by the broadcasting station 1, the control unit 106 updates the data of the updated database with the identification number stored in the storage unit 120, The carousel transmission unit 101 causes the selection unit 104 to output. Then, the transmitting unit 105
The data of the database from the selection unit 104 is transmitted to the receiver (Step B11).

When the data of the updated database is received by the receiving unit 201 (Step B12), the control unit 213
Retrieves from the storage unit 212 data in the database to which the same identification number is assigned as the identification number assigned to the updated database data (Step B13).
Then, the control unit 213 updates the searched database data with the newly received database data (Step B14).

In the present embodiment, the data to be updated is described as a part of the data in the database. However, the present invention is not limited to this case.

Next, a third embodiment will be described.

In the third embodiment, the information of the database described in the first embodiment and the second embodiment is
It is characterized by being displayed by a user action.

The configuration of the present embodiment will be described.

FIG. 9 is a diagram schematically showing the screen of the receiver.

In FIG. 9, reference numeral 3 denotes a screen of the receiver 2. The screen 3 displays various items for viewing a normal program, a video of a CM, and a data broadcast.

Reference numeral 4 denotes a remote controller. The data broadcast item is selected by operating the remote controller 4 and the related data is displayed on the screen 3.
To be displayed.

FIG. 10 is a diagram for explaining the storage unit 206 of the receiver.

In FIG. 10, reference numeral 206 denotes a storage unit. The storage unit 206 stores various databases for data broadcasting.

Next, the operation of the above configuration will be described.

When the viewer selects an item of information to be displayed by operating the remote controller, the control unit 205 retrieves the selected information from the storage unit 206 and displays the retrieved information on the screen. For example, when the items A, B, and C displayed on the screen 3 are associated with the player's lifetime database A, the other stadium database B, and the topics database C, respectively, when the viewer selects the item A by operating the remote controller. The information of the player's lifetime database is retrieved from the storage unit 206, and the retrieved information is displayed on the screen.

In the present embodiment, a case has been described where a screen for viewing a normal program and an item for displaying data broadcast information are displayed on the screen of the receiver. It is not limited to. For example, it is also possible to display only a menu for displaying data broadcast information on a normal broadcast screen.

The fourth embodiment will be described.

In the first embodiment, a case has been described where the database is transmitted intensively at a specific time (during CM). In the fourth embodiment, an identification number is assigned to data to be displayed on the broadcast station side, this data is transmitted to a receiver together with the database described in the first embodiment, and stored in the receiver. . Then, after that, when it is desired to display the predetermined data among the data with the identification numbers, the broadcasting station transmits a control signal including the identification number of the predetermined data to the receiver, and the receiver receives the control signal based on the control signal. And displaying the data.

More specifically, an identification number is assigned to data to be displayed on the broadcast station 1 in advance, and this data is transmitted in a CM along with the database described in the first embodiment. The data with the identification number is stored in the receiver. When the broadcast station 1 wants to display predetermined data among the data with the identification number, the control signal including the identification number of the data to be displayed is transmitted from the broadcast station 1 to the receiver 2, and received. The device 2 searches the memory (storage unit 202) for data having the same identification number as the identification number included in the control signal, and displays the searched data.

Hereinafter, the fourth embodiment will be described in detail.

In the following description of the fourth embodiment, an event message will be described as an example of a control signal. In addition, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and detailed explanation is omitted.

First, the configuration of the broadcasting station will be described.

FIG. 11 is a block diagram of the broadcasting station 1. FIG. 12 is a diagram for explaining data to which an identification number is assigned.

In FIG. 11, reference numeral 107 denotes a storage unit. The storage unit 107 stores data with identification numbers. For example, as shown in FIG. 12, in broadcasting of baseball, SB representing strike, ball, out
The identification numbers are assigned to the data of all the patterns of O, respectively.

Reference numeral 108 denotes an event message generator. The event message generator 108 specifies the type of data to be displayed on the receiver, and generates an event message for displaying the specified data.
For example, as shown in FIG. 12, when the current progress status of baseball is 1 strike, no ball, and no out, an event message for displaying data with identification number 2 is generated.

Reference numeral 109 denotes a selection unit. This selection unit 109
Selects one of the data from the carousel output unit 101, the data from the storage unit 107, and the event message from the event message generation unit 108 in accordance with an instruction from the control unit 110.

Reference numeral 110 denotes a control unit. The control unit 110
The current broadcast status from the APS 103 (program broadcast or C
Based on M broadcast), the selection unit 109 is controlled by determining whether to transmit the data from the carousel output unit 101 or the data from the storage unit 107. For example, A
When the information indicating that the current broadcast condition is that the program is being broadcast is received from the PS 103, the selection unit 109 is controlled so as to select the data from the carousel output unit 101, and A
When receiving from the PS 103 the information indicating that the current broadcasting status is CM broadcasting, the control unit 109 controls the selection unit 109 to select data from the storage unit 107. Further, after transmitting the data from storage unit 107, control unit 110 transmits a control signal instructing to delete the reset command added to the data from storage unit 100 by carousel transmission unit 1.
Send to 01. Further, when it is desired to display predetermined data among the data with identification numbers transmitted to the receiver in advance, the control unit 110
Generates an event message including the identification number of the data to be displayed, and controls the selecting unit 109 to select the event message from the event message generating unit 108.

Next, the configuration of the receiver will be described.

FIG. 13 is a block diagram of the receiver 2.

In FIG. 13, reference numeral 204 denotes a display unit. The display unit 204 displays data information in accordance with an instruction from the control unit 205.

Reference numeral 205 denotes a control unit. This control unit 205
Is for storing the data received by the receiving unit 201 in the storage unit 202. Further, when the received data includes an instruction, the control unit 205 deletes the data stored in the storage unit 202 and causes the storage unit 202 to store the received data. Further, the control unit 202 extracts an identification number from the event message received by the reception unit 201, searches the storage unit 202 for data having the same identification number as the extracted identification number, and displays the searched data on the display unit. 204 is displayed.

Next, the operation of the above configuration will be described.

FIG. 14 is a flowchart for explaining the present embodiment.

First, the APS 103 monitors the current broadcast state (Step C1). When the current broadcast state changes from broadcasting a program to broadcasting a CM (Step C2), APS1
03 transmits to the control unit 110 information indicating that the current broadcast status is CM broadcasting (Step C3).

Upon receiving from the APS 103 the information indicating that the current broadcast status is CM broadcasting, the control unit 110 transmits a control signal instructing to select data from the storage unit 107 to the selection unit 109 ( Step C4).

Upon receiving the control signal from control section 110, selection section 109 selects data from storage section 107 (Step C5). Then, transmitting section 105 transmits the selected data (Step C6).

Data transmitted from transmitting section 105 is received by receiving section 201 (Step C7). Then, the control unit 205 stores the received data in the storage unit 202 (Step C).

When data transmission is completed, control unit 110 transmits to carousel transmission unit 101 a control signal instructing to delete the reset command added to the data of the content stored in storage unit 100. Then, the carousel transmission unit 101 deletes the reset command from the content data based on the control signal (Step
C9). Then, the control unit 110 controls the selection unit 109 to select data from the carousel transmission unit 101,
The data is transmitted at a predetermined cycle (Step C1
0).

The operation up to this point is the same as in the first embodiment.

Subsequently, when an identification number is added and predetermined data among the data transmitted to the receiver is to be displayed, control unit 110 includes the identification number of the data to be displayed on event message generating unit 108. Generate an event message. For example, as shown in FIG. 12, when the current progress status of baseball is 2 strikes, no ball, and no out, an event message including the identification number 3 is generated (Step C9).

Further, control section 110 instructs selection section 109 to select the event message from event message generation section 106, and transmits this event message at transmission section 105 (Step C10).

The control unit 205 of the receiver having received the event message searches the data stored in the storage unit 202 for data having the same identification number as the identification number included in the event message (Step C11). ,
The searched data is displayed on the display unit 204 (Step
C12).

In the present embodiment, the specific time is set to CM
Although it is assumed that the broadcast is being performed and the data transmitted during the CM is described as the data with the identification number, the present invention is not limited to this case. For example, the data with the identification number and the database and the program described in the first embodiment may be transmitted intensively during the CM broadcast.

[0120]

According to the present invention, since data having a large amount of information is transmitted intensively during CM broadcasting, the amount of information to be transmitted by the carousel system is reduced, and the transmission cycle of other data is shortened. It has an excellent effect that it can be performed.

Further, according to the present invention, after transmitting large-capacity data such as a database from a broadcasting station, the reset command is deleted from the content data so that different content data can be received by the receiver. Also, there is an excellent effect that the already stored large-capacity data is not deleted, and it is not necessary to receive this data again, and the efficiency of data reception is high.

According to the present invention, information required by a viewer can be displayed in a short time by storing a data broadcast database in a receiver.

Further, according to the present invention, by storing data with an identification number in the receiver in advance, the broadcast station can display the data to be displayed on the receiver only by transmitting an event message. It has an excellent effect that it can be done. .

Further, according to the present invention, since the data is transmitted during the broadcast of the commercial, there is an excellent effect that it is possible to make it difficult for the viewer to skip the commercial as a subsidiary. .

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a first embodiment.

FIG. 2 is a diagram for explaining the first embodiment.

FIG. 3 is a block diagram of a broadcasting station.

FIG. 4 is a block diagram of a receiver.

FIG. 5 is a flowchart for explaining the first embodiment.

FIG. 6 is a block diagram of a broadcasting station 1.

FIG. 7 is a block diagram of a receiver 2.

FIG. 8 is a flowchart for explaining the second embodiment.

FIG. 9 is a diagram schematically showing a screen of a receiver.

FIG. 10 is a diagram for describing a storage unit 202 of the receiver.

11 is a block diagram of the broadcasting station 1. FIG.

FIG. 12 is a diagram for describing data to which an identification number is assigned.

FIG. 13 is a block diagram of the receiver 2.

FIG. 14 is a flowchart illustrating a fourth embodiment.

FIG. 15 is a diagram for explaining a conventional technique.

FIG. 16 is a diagram illustrating a memory of a receiver.

[Explanation of symbols]

 Reference Signs List 1 broadcast station 2 receiver 100, 102 storage unit 101 carousel transmission unit 103 automatic broadcast management system 104, 109 selection unit 105 transmission unit 106, 203 control unit 201 reception unit

Claims (16)

[Claims] 1. A data transmission method for transmitting content data stored in a storage area managed by a broadcasting station of a receiver in digital data broadcasting, the method comprising the steps of: Storing the data separately into a first content data group and a second content data group; transmitting the first content data group from a broadcast station using a first transmission method; From the station only within a predetermined period of time.
Switching to a second transmission method different from the second transmission method, and transmitting the second content data group in a concentrated manner. 2. The data transmission method according to claim 1, wherein the first transmission method is a carousel method. 3. The data transmission method according to claim 1, wherein said second transmission method is a stream method. 4. The data transmission method according to claim 1, wherein the predetermined time is a broadcast time of a commercial. 5. The data transmission method according to claim 1, wherein when transmitting the first content data group, an instruction to delete the second content data group stored in a storage area managed by a broadcast station is not added. 5. The data transmission method according to claim 1, further comprising the step of: 6. A step of transmitting update data for updating a part of the stored second content data group from a broadcast station by the first data transmission method, wherein the receiver includes: 6. The data transmission method according to claim 1, further comprising the step of: updating the stored second content data group with update data transmitted by the transmission method. . 7. An identification number is assigned to predetermined data of the second content data group to be transmitted, and when the predetermined data is to be displayed on a receiver, the identification number of the predetermined data is included. Transmitting the control signal on the receiver side, and searching for the data of the identification number indicated by the control signal from the stored second content data group on the receiver side; Displaying the searched data in the method according to any one of claims 1 to 6.
The data transmission method according to any one of the above. 8. The receiver further comprises the step of selecting data corresponding to the content selected by the user from the stored second content data group, and displaying the selected data. The data transmission method according to claim 1. 9. A broadcasting station of a data broadcasting system for transmitting content data stored in a storage area managed on a broadcasting station side of a receiver in digital data broadcasting, wherein a first content data group is stored. A first storage unit, a second storage unit in which a second content data group is stored, and a second content stored in the second storage unit in a case of a predetermined time. Selection means for selecting data and selecting the first content data stored in the first storage means in a case other than the predetermined time; and transmitting the content output from the selection means. And a broadcasting station of the data broadcasting system. 10. The broadcasting station according to claim 9, wherein the predetermined time is a broadcast time of a commercial. 11. A broadcasting station of the data broadcasting system,
11. The apparatus according to claim 9, further comprising: means for sequentially reading the first content data stored in the first storage means, and outputting the read content data to the selection means in a carousel system. The broadcasting station of the data broadcasting system described in 1. 12. A broadcasting station of the data broadcasting system,
Means for deleting, from the first content data, an instruction to delete the second content data group already stored in the storage area managed by the broadcast station when transmitting the first content data group. The broadcasting station of the data broadcasting system according to any one of claims 9 to 11, comprising: 13. The second storage means of a broadcasting station of the data broadcasting system, wherein data of a second content data group to be displayed by a receiver is stored with an identification number attached thereto. 10. The apparatus according to claim 9, further comprising: means for generating a control signal including an identification number of data to be displayed on the receiver among the data marked with.
3. A broadcasting station of the data broadcasting system according to any one of 2. 14. A second storage means of a broadcasting station of the data broadcasting system, wherein a second second content data group is stored with an identification number added thereto, and a second content data group is stored in the second storage means. 14. The method according to claim 9, wherein, when predetermined content data of the content data is updated, the transmission unit is configured to transmit the updated content data. The broadcasting station of the data broadcasting system described in 1. 15. A receiver of a data broadcasting system for transmitting content data stored in a storage area managed by a broadcasting station of a receiver in digital data broadcasting, wherein the first data transmitted from the broadcasting station is provided. Content data group,
Receiving means for receiving a second content data group or a control signal; storage means for storing the second content data received by the receiving means; A receiver for a data broadcasting system, comprising: a search unit for searching content data from the storage unit; and a display unit for displaying the content data searched for by the search unit. 16. The storage means stores a second content data group with an identification number transmitted from a broadcast station side, and when receiving an updated content data with an identification number from the broadcast station side, Search means for searching the storage means for content data having the same identification number as the identification number of the updated content data, and means for replacing the searched content data with updated content data. The receiver of the data broadcasting system according to claim 15, wherein