Method for identification of changes in broadcasted database

FIELD: methods for identification of changed in repeatedly broadcasted database.

SUBSTANCE: in accordance to the method data is produced in fragments, document is received which contains information about fragments, information is analyzed, and fragments are received repeatedly in accordance to aforementioned information.

EFFECT: possible listening of repeated broadcasting with minimal processing of data, detection of change of any data element and determining of location where the change is described.

4 cl, 2 dwg

 

The invention relates to a method easier identification of changes to repeatedly broadcast the database.

For systems that implement the broadcasting of audio/visual content (meaningful information content) to end users, usually characteristic and the broadcast data and/or metadata along with the audio/visual content. In order to implement systems standard TV Anytime ("TV-anytime") for metadata to describe the programs that you want to broadcast database information, which gives a description of the programs. To the receiving equipment was able to get the database when you configure a channel at any time, you must re-repeated broadcasting data according to the principle of the carousel. The database can be very large, and the periods of the carousel can be very long.

MPEG-7 defines a specification for conversion to a binary data file format for extensible hypertext markup language (XML) and to send updates. This standard does not address the issues arising from the repeated broadcasting. The MPEG-2 DSM cc Object Carousel is adopted for digital video (DVB) to send data to the file system when the broadcasting format for repeated re-broadcast. Carousel Object Carousel) is a major component of this technical solution, which is built to the EN higher level Protocol on top of the carousel object.

For a receiving device that receives the database, it is undesirable to perform constant listening in relation to the broadcast database and continuously to get it. It is likely that after some period of time this device is either not will need the current data, or it will put them in the cache locally on disk). It is desirable that these receptors were performed with opportunity, with minimal data processing, to listen duplicate broadcast, detect when any data element has changed, and determining which describes this change.

The objective of the invention is to solve the problems of the prior art.

According to the first aspect of the present invention provides a method of obtaining repeatedly broadcast data, according to which: receiving said data in fragments, receive a document with information about the mentioned fragments and re-receive the said fragments according to the aforementioned information.

In accordance with the second aspect of the invention provides a device for repeatedly broadcast data containing a receiving means for receiving the aforementioned data in fragments and to obtain a document containing information about the mentioned fragments, and processing means for analyzing the KJV is anotai information; these receiving device again receives the above-mentioned fragments in accordance with the aforementioned information.

According to a third aspect of the present invention provides a method of repeated broadcast data, according to which: perform the broadcasting of such data in fragments and perform the broadcasting of the document containing information about the mentioned fragments.

According to a fourth aspect of the present invention provides a device for repeated broadcast data containing the transmitting means for broadcasting the mentioned data in fragments and broadcast document containing information about the mentioned fragments.

The invention enables more efficient access to broadcast data.

The paper preferably contains a time stamp for each piece of data, with each time stamp indicates when the corresponding fragment was last updated. The document also preferably contains a timestamp indicating when the last time I updated the document itself. In the ideal case, the signal that initiates the re-obtaining fragments, is sent to the receiving device.

Embodiments of the invention are stated solely as an example, with reference to the accompanying drawings, where:/p>

Fig. 1 - schematic diagram of a broadcasting system, and

Fig. 2 is a schematic diagram showing the relationship between pieces of data and documents of the first and second levels.

In the broadcasting system according to Fig. 1, the transmitter 10 broadcasts the signal 14 to the receiver 12, which is a digital TV. Signal 14 includes audio/visual content 16 and the carousel 18 data. The carousel 18 data contains fragments of 20 data and document 22 of the upper level.

The transmitter 10 repeatedly broadcasts data 18 and includes a transmitting means for broadcasting data in fragments and broadcast of the document 22, which contains information about the fragments 20. The receiver 12 includes a receiving means 13 for receiving data 20 in fragments and to obtain the document 22, which contains information about the fragments of 20 data. The receiver 12 also includes means 15 for processing data analysis in document 22, while the receiving means 13 again receives fragments of 20 data according to the information in the document 22.

Broadcast database is divided into well-defined fragments 20. Each segment 20 is a piece of information, which should be updated as a whole. At the top level defined in the document 22 "top level", which describes where to find each piece of 20 (for example, file name) and its relationship with other frag the customers. In document 22 of the upper level is provided with a time stamp that describes when each block 20 has been updated in recent times. Document 22 of the upper level also has a timestamp indicating when it was last refreshed.

Document 22 top-level injected in a well known location in the file system broadcast (e.g., merry-go-round objects). The term "well-known" here means that either the location agreed upon well-known manner, or there is a standardized way of signaling the location of the document in the stream data transport. Document 22 of the upper level is entered in the "module" carousel objects in accordance with the specification carousel objects. The receiver 12 can easily extract the identification data of the module.

To identify updates the receiver 12 listens in relation to the module in the carousel object. The carousel object is signaled when the module is updated. Thus, when the receiver 12 identifies that the module containing the document 22 of the upper level, updated, he opens the module and analyzes the document 22 of the upper level. Timestamp confirmed (or not confirmed)that the document 22 of the upper level contains the change. If a change is found, the receiver 12 analyzes the document 22 top level object is detected by the I time stamps in each fragment identifier, to determine which fragments 20 changed. The receiver 12 can then decide whether this update is significant or not.

This system can be done with greater expandability through assumptions one document 22 of the upper level and a variety of documents 24 "second level", which has essentially the same functionality. Fig. 2 shows the relationship between the top level document 22, the documents 24 second level and 20 fragments of data. Optionally the document 22 top-level refers to the documents 24 of the second level. This link has a time stamp for easy identification of updates. And the document 22 of the upper level, and documents 24 of the second level can refer to fragments 20. Thus, the timestamp is still relatively easy identification of where the changes are and whether they are significant.

Document 22 received by the receiver 12 may be a specific file that is addressed is called again and saved by the receiver 12, or it can be part of a larger index transmitted by the transmitter 10 as part of the carousel 18 data. In the latter case, the document 22 is extracted from the index to read on request by receiver 12.

This system is particularly applicable to digital video (DVB) metadata standard TV Anyime.

1. The method of obtaining repeatedly broadcast data containing phases in which receive said data in fragments, receive a document containing information about the mentioned fragments, analyze the information and get re-referred to the fragments in accordance with the aforementioned information.

2. The method according to claim 1 in which the said document contains a time stamp for each piece of data, with each time stamp indicates when the corresponding fragment was updated last time.

3. The method according to claim 1 or 2, in which the said document contains a timestamp indicating when the said document was last refreshed.

4. The method according to claim 1 or 2, additionally containing phase, which take the signal that triggers the re-receiving pieces of data.

5. Device for repeatedly broadcast data containing a receiving means for receiving the aforementioned data in fragments and to obtain a document containing information about the mentioned fragments, and processing means for analyzing said information, these receiving means repeatedly obtains the aforementioned fragments in accordance with the aforementioned information.

6. Way repeated broadcast data containing phases, which perform the broadcasting of such data in the FR is mentah and perform the broadcasting of the document, contains information about the mentioned fragments.

7. The method according to claim 6 in which the said document contains a time stamp for each piece of data, with each time stamp indicates when the corresponding fragment was updated the last time.

8. The method according to claim 6 or 7, in which the said document contains a timestamp indicating when the said document was last refreshed.

9. The method according to claim 6 or 7, optionally containing phase in which broadcast signals, when said document is updated.

10. Device for repeated broadcast data containing the transmitting means for broadcasting the mentioned data in fragments and broadcast document containing information about the mentioned fragments.



 

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