JP3328589B2 - Terminal device, data stream generation device, data stream processing method, data stream generation method, and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a terminal device and a data stream processing method in the terminal device. The present invention also relates to a data stream generation device and a data stream generation method. Further, the present invention relates to a recording medium that records a program that causes a computer to execute a predetermined process on a received data stream.

[0002]

2. Description of the Related Art Conventional broadcasting services only transmit video and audio information constituting a program to users as broadcast waves. In recent years, as a new method for diversifying information transmission, data broadcasting called data broadcasting has been proposed. A delivery service has appeared. In the data broadcasting, a broadcasting company distributes data to a user similarly to video and audio information of a television, and provides various services based on the data. Data broadcasting has the advantage that large-capacity data can be transmitted over a wide area as compared with telephone lines and the Internet.

In the field of broadcasting services, digitization is rapidly progressing, and digital broadcasting using CS (communication satellite) or BS (broadcast satellite) and digital broadcasting using terrestrial waves are being put to practical use. . In digital broadcasting, high-efficiency compression transmission technology enables transmission of large amounts of data. Therefore, if data broadcasting is realized in BS digital broadcasting and the like in the future, it will be possible to transmit a larger volume of data over a wide range and at high speed.

[0004] With the progress of such digitalization, it is expected that information home appliances which can handle digital data and which have advanced functions of conventional home electric appliances such as televisions will become more and more popular in the future.

[0005] However, in general, information home appliances are generally inferior to personal computers in their ability to store data. For example, a personal computer generally has a hard disk having a storage capacity of about several gigabytes,
The fact is that information home appliances have a storage capacity of only a few megabytes at most. Even if a personal computer has a storage capacity of several gigabytes, the storage capacity available to the user is often limited because of the storage of a huge operating system and application programs.

When the amount of data to be handled becomes enormous, it becomes difficult to access necessary data accurately. For this reason, search data is searched for by giving search conditions to a search engine.
For example, on the Internet, there is a service in which a user sends information necessary for a search to a search engine provided by an Internet provider, and the search engine searches its own database and returns a search result.

By the way, in TCP / IP, which is a typical protocol used in the Internet, data transmission and reception are performed in synchronization between a transmitting side and a receiving side. On the other hand, in data broadcasting, regardless of whether or not a user terminal has reliably received data, data is unilaterally distributed from a broadcaster side. Therefore, a technique for ensuring the reliability of data transmission is required.

[0008] For example, even if data is repeatedly delivered in a fixed cycle and the received data is lost, it is received in the next cycle to ensure the reliability of data transmission. There is a technology called.

In the conventional "continuous transmission" system, the terminal device always stores the received data in the storage device, so that the data which has not been lost is similarly received and stored in the next cycle. Was.

[0010]

SUMMARY OF THE INVENTION As in data broadcasting,
If a huge amount of data is unilaterally delivered,
Only the information necessary for the user needs to be extracted.

However, in an information appliance having a relatively small storage capacity, it is not possible to search after storing all data. In view of the demand to keep terminal costs low for the spread of information home appliances, it is not appropriate to simply take measures to increase the storage capacity.

For this reason, in order to store only necessary data in a limited storage capacity, for example, on the Internet, a user himself specifies search conditions in advance, and this search is performed on distributed data. Searching is performed based on conditions.

However, in such a search,
Since the user associates a keyword with necessary information and specifies the keyword as a search condition, there is no relationship between the data to be distributed and the search condition specified by the user. Therefore, the search results include much information unnecessary for the user, and the search results cannot be said to be sufficient.

Accordingly, an object of the present invention is to provide a terminal device that provides only information required by a user in a push-type data distribution service such as data broadcasting, and a method of processing a data stream of the terminal device. And

Another object of the present invention is to provide a terminal device capable of efficiently receiving and processing data distributed by continuous transmission and a method of processing a data stream of the terminal device.

Still another object of the present invention is to provide a method for generating a data stream in consideration of data reception performance of a terminal device, a terminal device for receiving the data stream, and a method for processing the data stream of the terminal device. .

[0017]

According to the present invention, there is provided a data stream receiving means for receiving a data stream containing information on a data body and data attributes, and a data stream received from the data stream by the data stream receiving means. A data attribute extracting unit for extracting information; an attribute information comparing unit for comparing information on the attribute of the data extracted by the data attribute extracting unit with information on a user attribute specified in advance by a user; A data storage unit for storing a data body included in the data stream based on a comparison result by the comparison unit.

Therefore, according to the present invention, data required by the user is extracted according to the attribute information.

Here, the terminal device comprises: user attribute input means for inputting information on the user attribute; and user attribute storage means for storing information on the user attribute input by the user attribute input means. You may make it provide further.

The terminal device may further comprise a display means for displaying an input screen according to the screen information when the data stream receiving means receives screen information for inputting information on the attribute of the user as a data stream. May be further provided.

The present invention also provides a data stream receiving means for receiving a data stream composed of a plurality of partial data streams repeatedly transmitted in time series, and a flag storage means for storing flag information for each of the partial data streams. A data processing unit that performs a predetermined process for each of the partial data streams; and a partial data stream of the data stream received by the data stream receiving unit, according to the flag information stored in the flag storage unit. A terminal comprising: a data filter unit for outputting; and a flag changing unit for changing flag information stored in the flag storage unit, the flag changing unit corresponding to a partial stream for which a predetermined process has been completed by the data processing unit. Device.

Therefore, according to the present invention, processing is performed on the partial stream only when the flag information does not already indicate processing completion, and when the flag information indicates processing completion, the processing is performed on the partial stream. On the other hand, the processing is not performed again.

Here, the data filtering means is configured to output the second partial data sent from the data stream receiving means when the data processing means has completed a predetermined process on the first partial data stream. The stream may be output to the data processing means.

Further, according to the present invention, in a data stream generating apparatus for multiplexing a predetermined number of individual data streams to generate a data stream to be distributed, the partial data stream constituting the individual data stream may be
A data stream generating apparatus, wherein identification information for identifying the individual data stream is added, and multiplexing is performed such that transmission intervals of the partial data streams are different for each individual data stream.

Further, according to the present invention, identification information for identifying the individual data stream is added to the partial data stream constituting the individual data stream, and the transmission interval of the partial data stream differs for each individual data stream. In a terminal device receiving a data stream multiplexed as described above, identification information storage means for storing identification information of a specific individual data stream, and for the received data stream, identification information stored in the identification information storage means. And a filter unit for extracting a corresponding individual data stream.

Therefore, according to the present invention, since the transmission interval of the partial data stream is different for each individual data stream, the individual data stream having a short transmission interval has a relatively high communication speed and the individual data stream having a long transmission interval. Is relatively slow. For this reason, the terminal device can select a partial data stream suitable for its own processing performance, and can prevent data loss based on the processing capability.

Further, the invention of the above device can be grasped as a method invention, and the method invention can be grasped as a device invention.

That is, according to the present invention, a data stream including information relating to a data body and data attributes is received, information relating to the attributes of the data is extracted from the received data stream, and information relating to the attributes of the extracted data is received. A data stream processing method characterized by extracting a data body included in the data stream based on information and information on a user attribute specified in advance by a user.

According to the present invention, in a data stream processing method for receiving a data stream composed of a plurality of partial data streams repeatedly transmitted in time series and performing predetermined processing, the data stream is stored for each of the partial data streams. It is determined whether or not to process the partial data stream according to the flag information. If the flag information is not information indicating the completion of the processing, a predetermined process is performed on the partial data stream. Is completed, the flag information is changed to information indicating processing completion.

Further, the present invention relates to a data stream generating method for multiplexing a predetermined number of individual data streams to generate a data stream to be distributed, wherein the partial data stream constituting the individual data stream includes the individual data stream. A method for generating a data stream, characterized by adding identification information for identifying a stream and multiplexing such that the transmission intervals of the partial data streams are different for each individual data stream.

According to the present invention, identification information for identifying the individual data stream is added to the partial data stream constituting the individual data stream, and the transmission interval of the partial data stream differs for each individual data stream. In the data stream processing method of receiving the multiplexed data stream and performing predetermined processing, the identification information added to the individual data stream of the received data stream and the identification information stored in the storage unit of the terminal device A data stream processing method characterized by performing a predetermined process on the individual data stream when the identification information of the specific individual data stream corresponds.

Further, the present invention can be realized by causing a computer to execute a program having a predetermined function. That is, the present invention is a recording medium that records a program that causes a computer to perform a function of executing a predetermined process on a received data stream, wherein the program includes a data including information on a data body and data attributes. A data stream receiving unit for receiving a stream, a data attribute extracting unit for extracting information on the attribute of the data from the data stream received by the data stream receiving unit, and a data attribute extracting unit for extracting the attribute of the data extracted by the data attribute extracting unit. Attribute information comparing means for comparing information with information on a user attribute specified in advance by the user, based on a comparison result by the attribute information comparing means,
And a data storage means for storing a data body included in the data stream.

The present invention is also a recording medium recording a program for causing a computer to perform a function of executing a predetermined process on a received data stream, wherein the program is repeatedly transmitted in time series. Data stream receiving means for receiving a data stream composed of a plurality of partial data streams, and flag storage means for storing flag information for each of the partial data streams,
A data processing unit that performs a predetermined process for each of the partial data streams, and outputs a partial data stream of the data stream received by the data stream receiving unit to the data processing unit according to the flag information stored in the flag storage unit. And a flag changing means for changing the flag information stored in the flag storing means corresponding to the partial stream for which the predetermined processing by the data processing means is completed. It may be a recording medium on which recording is performed.

Further, the present invention is a recording medium on which a data stream is recorded, wherein the data stream has a predetermined number of individual data streams multiplexed, and each of the individual data streams has a plurality of partial data streams. A partial data stream comprising identification information for identifying the individual data stream, wherein an interval for each of the partial data streams is different for each of the individual data streams. A recording medium may be used.

Here, the recording medium (storage medium)
For example, in addition to a hard disk (HD), a DVD-RAM, a flexible disk (FD), a CD-ROM, and the like, a memory such as a RAM and a ROM is included. The computer also includes, for example, a so-called microcomputer that performs a predetermined process by interpreting a program by a so-called central processing unit such as a CPU or an MPU.

[0036]

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

[First Embodiment] FIG. 1 is a diagram showing the overall configuration of a data distribution system according to the present embodiment. As shown in FIG. 1, the present data distribution system includes a content provider / broadcasting company (hereinafter, “content provider”) that provides various contents to users as data broadcasts.
Collectively. ) And a terminal device that receives data distributed from a content provider and performs screen display and audio output based on the data.

[0038] The content provider includes a content storage unit 101 storing contents to be provided to the user, a distribution data generation unit 102 for generating distribution data for data broadcasting based on the contents, and a distribution satellite, for example. And a transmission unit 103 for transmitting to.

On the other hand, the terminal device is inputted from a receiving unit 104 for receiving a broadcast wave (data stream) from a broadcast satellite or the like, an input unit 105 for inputting information (user attribute) concerning a user's individual, and an input unit 105. A user attribute storage unit 106 for storing user attributes, an information search unit 10 for extracting only data necessary for the user from the received data
7. a data storage unit 108 for storing the extracted data;
The data stored in the data storage unit 108 is output to the output device 11
An output control unit 109 is provided for performing control for outputting the signals to 0a and 110b.

The output control unit 110 sends data to output devices 110a and 110b via a decoder (not shown). The output devices 110 and 110b are a display for displaying a screen, a speaker for outputting based on an audio signal, and the like.

Note that, in the present embodiment, the content is distributed from the content provider to the terminal device by a broadcasting satellite, but the present invention is not limited to this. For example, distribution by a communication satellite may be used. Instead of satellite broadcasting, terrestrial broadcasting, so-called cable television broadcasting (CATV), the Internet, WAN (WideAr
ea Network). In short, any data may be used as long as predetermined data is transmitted to the terminal device of the user.

In this embodiment, in order to search (extract) only necessary data from a data stream transmitted by data broadcasting or the like in accordance with a condition specified by a user, a data attribute is given to the transmitted data stream.
A search is performed according to the data attribute and a user attribute set in advance by the user.

The user attribute is information unique to the user or information specified by the user. The user-specific information is, for example, name, age, address, postal code, occupation, birthday, hobby, interests, and the like. Further, the information specified by the user is, for example, price range, sales area, vehicle type, optional equipment, vehicle color, manufacturer, etc. in the case of information about a car, and price range, house type ( Single-family, condominium, land), size, floor plan, area, line, station, developer, sales company, equipment, etc.

This user attribute is composed of a user attribute name and a user attribute value. That is, a set of user attribute name = user attribute value is stored in the user information storage unit 106 of the terminal device. When a plurality of user attribute values correspond to one user attribute name, a designation method is defined depending on the type of logical operation.

In the case of a logical operation (AND), each user attribute value is given to the same user attribute name.

User attribute name 1 = User attribute value 1 User attribute name 1 = User attribute value 2 User attribute name 1 = User attribute value 3 On the other hand, in the case of a logical operation (OR), a delimiter ( A plurality of user attribute values are enumerated by "|"

User attribute name = user attribute value 1 | user attribute value 2 | user attribute value 3 If the user attribute value contains "|", use the escape character "@" To distinguish it from the delimiter.

The logical operation may be a composite of AND and OR, for example, (A OR B) AND (C OR D OR E).

The user attributes are input from the input unit 105 of the terminal device and stored in the user attribute storage unit 106. FIG. 2 is a diagram for explaining a user attribute registration process.

In the figure, a search condition input screen is displayed on the display screen, and the user makes an input (STE
P201 to 202). When the input is completed, the user attribute name and the user attribute value are read (STEP 203), and it is determined whether or not the user attribute name has already been registered (STEP 204). If it is determined that the user attribute name is registered, the logical operation included in the user attribute value is determined. That is, when the logical operation is “OR”, after processing “|” included in the user attribute value (STEPs 206 to 207), the user attribute value is enumerated by separating “|” in the user attribute name. Yes (STE
P208). Then, a pair of the user attribute name and the user attribute value is stored in the user attribute storage unit 106 (STE
P209).

On the other hand, if it is determined in STEP 205 that the logical operation is not “OR” but “AND”, one user attribute value may be given to the user attribute name. A set of an attribute name and a user attribute value is stored.

If it is determined in STEP 204 that the user attribute name is not registered,
Move to 209.

The data attribute is information to be searched which is given to the data stream transmitted from the content provider. This data attribute includes a data attribute name and a data attribute value. That is, a set of data attribute name = data attribute value is included in the transmitted data stream.
The data attribute is placed and transmitted before the data body in the data stream.

FIG. 3 is a diagram showing an example of a data stream format according to the present embodiment.

In the figure, a "data synchronization signal" is used for the terminal device to synchronize when receiving a data stream, and a "data number" is a sequential number given to identify each data body. It is.
The “data attribute size” is given the data size up to the last “data attribute” in the data stream, and the “data attribute number” is given the number of subsequent “data attributes”. "Data attribute" is "Data attribute name size",
It consists of “data attribute name”, “data attribute value size”, and “data attribute value”. In the data stream, the data body follows the “data attribute”. "Data item size"
Is given the data size up to the last "data item" in the data stream, and "number of data items" is given the number of subsequent "data items". The “data item” includes “data item name size”, “data item”, “data size”, and “data”.

FIG. 4 is a diagram for explaining the operation processing of the terminal device according to the present embodiment. As shown in the figure, the terminal device receives the data stream (STEP 40).
1) It is determined whether the data attribute is completed (STE)
P402). If the data attribute is not completed, a set of data attribute name and data attribute value are extracted (ST
(EP403) A set of user attribute names and user attribute values are extracted (STEP404), and it is determined whether the user attribute names match the data attribute names (STEP40).
5). If it is determined that the user attribute name matches the data attribute name, it is further determined whether the user attribute value matches the data attribute value (STEP 40).
6). If it is determined that either the user attribute name and the data attribute name or the user attribute value and the data attribute value do not match, the next set of the user attribute name and the user attribute value is read out and the same determination is made. .

If it is determined in STEP 406 that they match, the value of the number of matches n is incremented (STEP 407), the process returns to STEP 402, and the above processing is repeated until the data attribute ends.

If it is determined in STEP 402 that the data attribute has been completed, it is next determined whether or not the number of matches n has exceeded a certain value (STEP 408). This means that if data is to be stored even when only one user attribute matches one data attribute, a very large amount of data must be stored, and only data exceeding a certain threshold value is stored. It is to make it.
The fixed value can be arbitrarily given by the user. If it is determined that the number of matches n exceeds a certain value,
The data body following the data attribute is stored (STEP
409). On the other hand, if it is determined that the data is not exceeded, the data body is discarded (STEP 410).

As described above, according to the present embodiment, upon receiving the data stream, it is determined whether necessary data is stored or discarded based on the user attribute specified by the user and the data attribute given to the data stream. Therefore, there is no need to temporarily store all data streams, the storage area can be used efficiently, and the search can be performed with a limited storage capacity.

In particular, since information to be searched is given as a data attribute to the transmitted data stream, the user only has to specify a user attribute corresponding to this data attribute, and efficient search can be performed. It becomes possible.

If the data provided to the user has locality, the data attribute is provided with, for example, a seven-digit postal code or an area code of a telephone number. If a postal code or an area code of a telephone number is designated, data for each area where the user lives can be searched.

In the above embodiment, the number of matches n is set. However, a limit value is set based on the storage capacity of the data storage unit 108, and it is determined whether the limit value is exceeded. It may be stored or discarded.

[Second Embodiment] In a data broadcast, a data stream is unilaterally delivered from a content provider regardless of whether or not a user terminal device has reliably received the data stream. For this reason,
As shown in FIG. 5, by continuously transmitting a data stream in which data is repeated in a constant cycle,
Even if the data to be received is missed, the loss of data can be prevented by receiving the data in the next cycle.

In the second embodiment, when the data stream is "continuously transmitted", the terminal apparatus sets a flag indicating that the processing has been completed for data that has already been received and for which predetermined processing has been completed. In the next cycle, by ignoring the processing for the flagged data,
It is characterized by efficiently processing data.

FIG. 6 is a diagram showing a configuration of the terminal device according to the present embodiment. As shown in FIG.
4 receives the data stream including the data attribute and sends the data stream to the filter unit 61, as in the first embodiment. The filter unit 61 transmits the data to the separation unit 62 in order to search only data that has not yet been searched out of the data transmitted from the data receiving unit 104. The filter unit 61 refers to a flag bit corresponding to the data in a flag storage unit 64 described later. The separating unit 62 separates the transmitted data stream into a data attribute and a data body, sends the data attribute part to the comparing unit 63, and stores the data body in the data storage unit 108 based on the instruction of the comparing unit 63. Output to

The comparing unit 63 compares the transmitted data attribute with the user attribute stored in the user attribute storage unit 106, and stores the data body following the data attribute in the data storage unit 10.
8 is to be determined. Also, the comparison unit 63
Sets the flag bit of the flag storage unit 64 corresponding to the data stream to ON when this process ends.
To

FIG. 7 is a diagram for explaining the operation of the terminal device according to the present embodiment. As shown in FIG.
Upon receiving the data, data receiving section 104 determines whether or not this is the first reception (STEPs 701 to 701).
02). When the data receiving unit 104 determines that it is the first data reception, it turns off all flag bits of the flag storage unit 64 (STEP 703). STEP7
02, if it is determined that the data has not been received for the first time, the data is sent to the filter unit 61, and the filter unit 61 acquires a data number (STEP 704).
The corresponding flag bit in the flag storage unit 64 is referred to (STEP 705). Here, when it is determined that the flag bit is OFF, the filter unit 61 further performs
The comparing unit 63 determines whether or not the search process is being performed (ST
EP 707). If the comparing unit 63 determines that the search process is not being performed, the filter unit 61 sends the data to the comparing unit 63 via the separating unit 62 (STEP 70).
8). The comparing unit 63 compares the data attribute with the user attribute and performs a search process to determine whether necessary data is included (STEP 709). Thereafter, the corresponding flag bit of the flag storage unit 63 is turned ON (STEP 710),
It returns to the process of STEP701.

In STEP 706, the flag bit is set to O
If it is determined to be N, or if it is determined in STEP 707 that the comparison unit 63 is processing, the filter unit 61 does not send data to the comparison unit 63,
The above processing is performed for the next data.

The search processing in STEP 709 is the same as that in the first embodiment, and a description thereof will not be repeated.

FIGS. 8 and 9 are diagrams showing an example of how the flag bits change. In FIG. 8, the data stream indicates a state in which data of data numbers 1 to 5 are continuously transmitted, and the “processing position” indicates the position of the data received by the filter unit 61 at the time when the comparing unit 63 is processing the data. The position is conceptually shown. Further, the flag storage unit 106 has flag bits from 1 to m.

First, it is assumed that a search process is performed on data 1 in FIG. 8 (first stage), and the process on data 1 is completed (second stage). As a result, the flag bit 1 corresponding to the data 1 is turned on. Since the processing for data 1 was completed while the data body of data 1 was being received,
A search process is similarly performed on data 2 (third stage), and upon completion of the process on data 2, the flag bit 2 corresponding to data 2 is turned on (fourth stage). However, since the processing for the data 2 has been performed after the reception of the data 3, the processing for the data 3 is not performed, and the search processing for the data 4 is performed by receiving the next data 4 (fifth stage). Similarly, when the search process for data 4 is completed before data 5 is received, flag bit 4 corresponding to data 4
Turn ON.

FIG. 9 shows an example of how the flag bits change in the next cycle. For example, as described with reference to FIG. 8, the search process is not completed for the data 3 and the data 5 within a predetermined time, and the corresponding flag bit is
Suppose that it was still FF.

When data 1 is received by continuous transmission, since the flag bit 1 corresponding to data 1 is already ON, the search processing for data 1 is not performed (first stage). Similarly, data 2 is also ignored (second stage). Next, when the data 3 is received, since the corresponding flag bit 3 is OFF, a search process is performed on the data 3 (third stage). Upon completion of the processing for the data 3, the corresponding flag bit 3 is turned on (the fourth stage). The same applies to the data 4 for which the search processing has been completed and the data 5 which has been omitted.

As described above, according to the present embodiment, the flag bit is turned on for data that has already been received and for which search processing has been performed, so that useless search processing is not performed. Also, every time the continuous feeding cycle is repeated,
The search process for the data is gradually completed.

[Third Embodiment] In the third embodiment, when the next data is received during the search process, the search process is interrupted and the data is regarded as missing. And performing a search process on the next data.

FIG. 10 is a diagram showing a configuration of the terminal device according to the present embodiment. In the second embodiment, the filter unit 61 sends out data when the comparison unit 63 is not processing. However, in the present embodiment, the interruption control unit 1001
That the comparison unit 63 has interrupted the processing by the filter unit 61
Is sent out when notified.

That is, in FIG.
When new data is received, the interrupt control unit 10
01 and sends the data to the filter unit 61. The interrupt control unit 1001 interrupts the comparison unit 63 to interrupt the search processing. The comparison unit 63
If there is an interrupt from the interrupt control unit 1001, it is determined whether or not the interrupt is continuous, and if it is determined that the interrupt is not continuous, a notification to the effect that the processing has been interrupted is sent to the filter unit 61. . This is to avoid a situation where the processing is not completed due to the interruption if the processing is interrupted every time an interruption occurs.

As in the second embodiment, the filter unit 61 sends only data for which the flag bit is OFF to the comparison unit 63 via the separation unit 62.

As described above, according to the present embodiment, the flag bit is turned ON for data that has already been received and for which search processing has been performed, so that useless search processing is not performed. Also, every time the continuous feeding cycle is repeated,
The search process for the data is gradually completed.

[Fourth Embodiment] In data broadcasting, regardless of whether or not a user terminal has reliably received data, data is unilaterally distributed from a content provider. For this reason, depending on the processing performance of the terminal device, data to be received may be frequently missed.

In the fourth embodiment, one transmission band is shared by a plurality of data streams having different transmission speeds, and the terminal device selects a data stream suitable for its own processing performance and receives the data stream in synchronization with the data stream. It is characterized by doing.

FIG. 11 is a diagram for explaining a data stream according to the present embodiment. FIG. 3A shows an example of a data stream format.
In that a stream number has been added to the stream data shown in FIG. The stream number is a number for identifying a stream to be synchronized in the terminal device. FIG. 2B is a diagram showing a state where a plurality of data streams as shown in FIG. 1A are time-division multiplexed and transmitted. As shown in FIG. 3B, the data transmission intervals are different for each data stream. For this reason, the number of data for each data stream to be transmitted for each predetermined block (stream block) is determined according to the total number of data streams (the number of multiplexes). When the total number of data streams is N, the number of data per data stream is N * (N + 1) / 2 (pieces) as one unit block, and the data of data stream number K (1 ≦ K ≦ N) included in this block Is K.

That is, when the total number of data streams is 3, the number of data of stream number "1" is 1, the number of data of stream number "2" is 2, and the number of data of stream number "3" is in one stream block. The number of data includes three. As a result, the terminal device appears to have different speeds of the transmitted data.

If data of the same stream number is continuously transmitted in one stream block, the uniformity and uniformity of the transmission speed will be lost. Therefore, in order to secure the uniformity and uniformity of the data transmission speed for each data stream, the transmission order (bucket number) of the data for each data stream in one stream block is determined as shown in FIG.

FIG. 13 is a diagram showing the configuration of the terminal device according to the present embodiment. FIG. 14 is a diagram for explaining the operation of the terminal device according to the present embodiment. In FIG. 13, a stream number storage unit 1301 stores a stream number of a data stream to be synchronized in consideration of its own terminal performance. The stream number may be set in advance by the user or may be determined at the time of initialization when receiving the data stream. The stream number recognizing unit 1302 extracts a stream number from the data stream as shown in FIG. 11 and compares the extracted stream number with the stream number stored in the stream number storage unit 1301 to identify a matched data stream. The information is sent to the information search unit 107.

Thus, it appears to the terminal device that data streams with different communication speeds are being transmitted. Therefore, the terminal device only needs to receive the data stream of the communication speed according to its own processing performance, and it is possible to avoid data loss due to the imbalance between the processing performance of the terminal device and the communication speed.

[Other Embodiments] The above embodiments can be combined as appropriate. For example, a function of recognizing a stream number may be added to the terminal device according to the second embodiment having a flag indicating a processing result of a data stream that is continuously transmitted. This makes it possible to receive a multiplexed and continuously transmitted data stream, thereby preventing data loss.

Further, in the above embodiment, the flow of the processing operation has been described sequentially, but the present invention is not particularly limited to this. Therefore, unless there is a contradiction in the processing operation,
The processing procedure may be changed or the processing may be performed in parallel.

[0089]

Next, an embodiment in which a home delivery service of house information is provided will be described.

The provision of the home information delivery service is composed of three phases.

First Phase: Screen Transmission for Search Condition Input A plurality of condition input programs are transmitted in accordance with the user's needs for housing. Examples of condition input programs are "for those who are only interested", "for those who have a certain degree of hope", "for those who are waiting for a good property", "for single-family homes", and "for condominiums". These are broadcast as a data program in a specific time zone.

The user obtains the condition input program by selecting the channel of the data program being broadcast, and inputs the condition of the property he is looking for. Data broadcast receiving terminal device stores in memory the entered criteria as user attribute.

Second phase: Broadcasting of house information data and execution of search The content provider broadcasts data relating to all house information together with data attributes by continuous transmission and multiplexing.

[0094] The data broadcast receiving terminal device receives the house information data broadcasted by the data broadcast, and performs a search process according to the user attribute stored in the memory. And
The data broadcast receiving terminal device stores data matching the search condition in the memory.

Third phase: display of house information for user The data broadcast receiving terminal device notifies the user that necessary information has been extracted as a result of searching the received house information data. The user issues a display instruction of the search result, and the data broadcast receiving terminal device displays the search result.

[0096]

According to the present invention, a data attribute is provided to a data stream to be transmitted, and a search is performed based on the data attribute and a user attribute specified by the user. It becomes possible to search.

Further, according to the present invention, the flag indicating whether or not the processing has been completed for the data to be continuously transmitted is provided. Only the process can be performed.

Furthermore, according to the present invention, data streams are transmitted in a time-division multiplexed manner so that the data transmission intervals are different for each data stream, so that data streams having different communication speeds are transmitted to one transmission band for the terminal device. Looks like it is. Therefore, the terminal device only needs to receive a data stream having a communication speed according to its own processing performance,
Data can be prevented from being lost due to an imbalance between the processing performance of the terminal device and the communication speed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a data distribution system according to a first embodiment.

FIG. 2 is a diagram for explaining a user attribute registration process;

FIG. 3 is a view showing an example of a data stream format according to the first embodiment;

FIG. 4 is a diagram for explaining an operation process of the terminal device according to the first embodiment;

FIG. 5 is a diagram for explaining continuous transmission of a data stream;

FIG. 6 is a diagram showing a configuration of a terminal device according to a second embodiment.

FIG. 7 is a diagram for explaining the operation of the terminal device according to the second embodiment;

FIG. 8 is a diagram showing an example of a state of change of a flag bit.

FIG. 9 is a diagram showing an example of a state of change of a flag bit.

FIG. 10 is a diagram showing a configuration of a terminal device according to a third embodiment.

FIG. 11 is a view for explaining a data stream according to a fourth embodiment;

FIG. 12 is a diagram illustrating an operation of a distribution data generation unit according to the fourth embodiment.

FIG. 13 is a diagram showing a configuration of a terminal device according to a fourth embodiment.

FIG. 14 is a diagram for explaining the operation of the terminal device according to the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 ... Content storage part 102 ... Distribution data generation part 103 ... Transmission part 104 ... Reception part 105 ... Input part 106 ... User attribute storage part 107 ... Information search part 108 ... Data storage part 109 ... Output control part 110 ... Output device

Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) G06F 13/00 G06F 17/30 H04L 12/18 H04J 3/00-3/26 H04J 5/22-5/26 H04J 1 / 00-1/20 H04J 4/00-15/00 H04L 5/00-5/12 H04N 7/12-7/137

Claims (14)

(57) [Claims] 1. A data stream generating device for multiplexing a plurality of individual data streams to generate a data stream to be distributed, wherein the individual data streams to be included in a predetermined stream block are arranged in accordance with the total number of the individual data streams to be multiplexed. Determining the number of partial data streams constituting each of the data streams for each of the individual data streams; adding identification information for identifying the individual data stream to the partial data streams; A data stream generating apparatus, wherein the plurality of individual streams are multiplexed such that transmission intervals of data streams are different according to the determined number. 2. The data stream generation device according to claim 1, wherein the transmission order of the individual data streams is determined so that the partial data streams to which the same identification information is added are not continuous. 3. The method according to claim 2 , wherein when the total number of the individual data streams is N, the number of the partial data streams to be included in the predetermined stream block is N * (N + 1) / 2. 3. The data stream generation device according to 1 or 2. Each partial data stream constituting a 4. A plurality of individual data streams, the identification information for identifying the individual data streams are added, and transmission interval of the partial data stream for each of the individual data streams In a terminal device receiving a data stream multiplexed differently according to the total number of the individual data streams, identification information storage means for storing identification information of a specific individual data stream suitable for its own terminal performance; And a filter unit for extracting only an individual data stream corresponding to the identification information stored in the identification information storage unit from the received data stream. 5. The data processing apparatus according to claim 1, wherein the terminal device is configured to extract information relating to an attribute of data included in the extracted individual data stream; and information relating to the attribute of the data extracted by the data attribute extracting unit and a user. and attribute information comparison means for comparing the information about the attributes of the user specified in advance by, based on the comparison result by the attribute information comparing unit, a data storage means for storing the data body included in the individual data streams, the The terminal device according to claim 4, further comprising: The method according to claim 6, wherein the terminal device, and a flag storage means for storing flag information for each of the partial data stream, a data processing means for performing predetermined processing for each of the partial data stream, prior to Ki受 signal data stream Data filter means for outputting the partial data stream to the data processing means in accordance with the flag information stored in the flag storage means; and the flag storage means corresponding to the partial stream for which predetermined processing by the data processing means has been completed. The terminal device according to claim 4 , further comprising: a flag changing unit configured to change the flag information stored in the terminal device. 7. A data stream generating method for multiplexing a plurality of individual data streams to generate a data stream to be distributed, wherein the individual data streams to be included in a predetermined stream block are arranged according to the total number of the individual data streams to be multiplexed. Determining the number of partial data streams constituting each of the data streams for each of the individual data streams; adding identification information for identifying the individual data stream to the partial data streams; A method for generating a data stream, comprising: multiplexing the plurality of individual streams so that transmission intervals of the data streams are different according to the determined number. 8. Data stream generating method according to claim 7, wherein the same identification information is added to said partial data stream and determines the transmission order of the individual data streams to prevent continuous. 9. The method according to claim 1 , wherein when the total number of said individual data streams is N, the number of said partial data streams to be included in said predetermined stream block is determined as N * (N + 1) / 2. Item 9. The data stream generation method according to Item 7 or 8. 10. An identification information for identifying the individual data stream is added to a partial data stream constituting each of the plurality of individual data streams, and
A method for processing a data stream in a terminal device, which receives and multiplexes a data stream multiplexed such that transmission intervals of the partial data streams for each of the individual data streams are different according to the total number of the individual data streams, Storing the identification information of a specific individual data stream that matches the performance of the terminal device; and extracting only the individual data stream corresponding to the stored identification information from the received data stream. A method for processing a data stream, comprising: 11. A method of processing the data stream, comprising: extracting information relating to an attribute of data included in the extracted individual data stream; and information preliminarily designated by a user relating to the information relating to the attribute of the extracted data. The data according to claim 10, further comprising: comparing information on a user attribute; and storing a data body included in the individual data stream based on a result of the comparison. How to process the stream. Processing method according to claim 12, wherein the data stream includes storing the flag information for each of the partial data stream, a partial data stream of the received data stream, in accordance with the stored flag information, predetermined data processing 12. The method according to claim 10, further comprising: outputting to the means, and changing the stored flag information corresponding to the partial stream for which the predetermined processing by the data processing means is completed. How to process the data stream. 13. A recording medium on which a program for causing a terminal device to execute a function of executing a predetermined process on a received data stream is recorded, wherein the program comprises a part constituting each of a plurality of individual data streams. Identification information for identifying the individual data stream is added to the data stream, and the data streams are multiplexed so that the transmission interval of the partial data stream for each individual data stream differs according to the total number of the individual data streams. Receiving means for receiving the received data stream, identification information storage means for storing identification information of a specific individual data stream suitable for its own terminal performance, and identification information stored in the identification information storage means for the received data stream. A filter that extracts only individual data streams corresponding to information And a means for causing the terminal device to realize the above means. 14. A recording medium on which a data stream is recorded, wherein the data stream has a predetermined number of individual data streams multiplexed, and each of the individual data streams is composed of a plurality of partial data streams. The partial data stream has identification information for identifying the individual data stream, and the interval between the partial data streams for each individual data stream is set according to the predetermined number of the individual data streams. A recording medium that records a data stream that is different for each.