DE102011109125A1 - Method for displaying media context during output of multimedia content e.g. video film, by transmission server, involves displaying media context as representation of context by client processing unit with own output device - Google Patents

Abstract

The method involves outputting multimedia data (21) to an output apparatus (30), and determining a media-related keyword (41). A search term (71) for the media-related keyword is constructed. A media context (51) is retrieved in dependence of the search term. The media context is displayed as a representation of a context by a client processing unit (61) with an own output device (62). A pattern recognition method is applied to the multimedia data to determine the media-related keyword. A retrieval query is carried out in an Internet (50). The output apparatus is selected from a TV set, a computer screen or a projector. The client processing unit is selected from a smartphone and a tablet computer. The recognition of the keyword is performed by different pattern recognition methods such as speech recognition method, musician identifying method, pattern recognition method and text recognition method. An independent claim is also included for a device for displaying a media context of multimedia contents.

Description

The invention relates to a method for displaying media context during the output of a multimedia content by a computing unit and a device provided for this purpose.

In the prior art, on the one hand, there are methods with which semantic contents from media such. B. videos or audio data z. B. automatically extracted via pattern recognition. On the other hand, multimedia data that already contains meta-information about the semantic content that was manually and firmly programmed during the creation of the multimedia data exists. While the former state of the art is used in multimedia databases to enable search in these databases (eg video databases) with keywords, the second prior art is used in the entertainment area to present additional information about particular content to the viewer.

A disadvantage of the prior art is that the systems for automatic recognition of multimedia context are not set up to provide the user with a representation of the media context automatically and during the display of the media context, since these methods are executed internally for indexing for search queries. The variant of the permanently programmed media context in media data has the disadvantage that previously any media data must be enriched manually with semantic meta-information and further this system does not allow a comfortable presentation of the media context, without the user being disturbed by the context presentation while viewing the media data.

It is an object of the present invention to obviate the drawbacks of the prior art and to provide a method and apparatus for enabling automatic extraction of media context as well as comfortable and non-obtrusive presentation of the media context during media data output.

The object is solved by the independent claims. Advantageous developments are defined in the subclaims.

• – Ausgeben von Multimediadaten (21) an ein Ausgabegerät (30);
• – Ermitteln von mindestens einem medienbezogenen Schlagwort (41);
• – Erstellen eines Suchbegriffs (71) aus mindestens einem medienbezogenen Schlagwort (41);
• – Einholen des Medienkontexts (51) in Abhängigkeit des Suchbegriffs (71);
• – Darstellen des Medienkontexts (51) als eine Kontextdarstellung (61) durch eine Client-Recheneinheit (61) mit eigener Ausgabeeinrichtung (62).

In particular, the problem is solved by a method for displaying media context ( 51 ) during the output of a multimedia content ( 20 ) by a computing unit ( 10 ), comprising the steps:

• - output of multimedia data ( 21 ) to an output device ( 30 );
• - determining at least one media-related keyword ( 41 );
• - Create a search term ( 71 ) from at least one media-related keyword ( 41 );
• - obtaining the media context ( 51 ) depending on the search term ( 71 );
• - Representation of the media context ( 51 ) as a context representation ( 61 ) by a client computing unit ( 61 ) with its own output device ( 62 ).

In this way, search terms are automatically generated from multimedia data and used to obtain media context. This media context is then displayed on a client computing unit, so that the multimedia content is displayed on a computing unit and the context representation on another, namely the client computing unit with its own output device and thus the context presentation does not irritate the viewer when viewing the multimedia content. Several people can thus display different information independently of each other. For this purpose, user profiles are preferably created in the arithmetic unit, which reflect the interests of the user of the respective client arithmetic unit. From several keywords, search terms or media contexts or their representations are preferred then selected those that have a greater content similarity with the corresponding user profile than others.

A multimedia content is preferably a video, the video preferably also containing text elements or audio signals. Particularly preferably, a multimedia content is a preferably digital video signal of a television channel, a movie on a DVD / HDD or a video-on-demand streaming file.

Media context is preferably additional information that has contextually related to the multimedia content. Such information is z. For example, the location of a feature film, the contributing actors, historical backgrounds to a feature film or documentary, lexical information on the content of the film (eg physical phenomena or technical background). Media context is preferably in the form of digital data that z. B. come from the Internet.

The media context is preferably displayed simultaneously with the output of the multimedia content. This allows a viewer without interrupting the actual multimedia content incidentally use the displayed media context in order to find out more about the content of the multimedia content.

The arithmetic unit is preferably one in a television such. B. an LCD TV integrated computing unit. Alternatively, the arithmetic unit is a computing unit integrated in a set-top box. In another embodiment, the arithmetic unit is a transmission server, which contains the multimedia content z. B. over terrestrial radio transmission, or IP-TV transmission via (cable TV) network to the output device, such. B. a TV, sends.

The multimedia data are preferably the representation of the multimedia content by electrical, preferably digital signals. Multimedia data are z. As a video and / or audio stream or an analog or digital television signal, digital or analog images or audio signals.

The output device is z. A TV, a computer screen, or a projector connected to a TV receiver or computer.

The step of outputting the multimedia data to an output device is e.g. As playing a movie on a TV, preferably the film was previously received by the TV by the computer.

A media-related keyword is z. For example, the name of an actor who plays in the movie, the name or model of a car that can be seen in the movie, the composer of a background music, keywords on historical backgrounds, played roles, or the true ones Figures that are re-enacted in the movie, the name of a landscape or city being shown.

Determining the media-related keyword is preferably carried out by a computing unit, particularly preferably by that which is also used to output the multimedia content.

In this way, a media-related keyword is automatically determined based on the multimedia data, without this must be manually added to the media data added.

The search term is preferably represented by digital data representing the content of a search request. Preferably, the search term is the media-related keyword itself. Preferably, the search term is a sequence of several media-related keywords. The creation of the search term is z. As a preparation of a media-related keyword so that it can be entered in an Internet search engine, or that juxtaposition of several media-related keywords, so that they can be used together for the query of an Internet search engine.

Obtaining the media context as a function of the search term is preferably the query of an Internet search engine or an Internet lexicon with respect to the search term.

The context representation is preferably a representation adapted to the output device of the client computing unit. Preferably, the context representation is adapted by the context representation is created by the arithmetic unit in different levels of resolution and forwarded to the client arithmetic unit, and the best possible adapted context representation is selected by the client arithmetic unit. Preferably, the context representation is adapted to the resolution of the output device of the client computing unit. In this case, information about the resolution of the output device of the client computing unit is read out by the arithmetic unit, which prepares the media context representation, and / or only the device type or the operating system of the client arithmetic unit is read out and then applied to a resolution of the output device of the client computer. Arithmetic unit closed by z. B. a database with properties of the specific device types is questioned. A readout of the information by the arithmetic unit z. B. via an HTTP request, which is sent from the client processing unit to the arithmetic unit and preferably contains information to the client computing unit, its operating system and / or the resolution of the output device. Alternatively, the contextual presentation is optimized and sent for several different resolutions so that the client computing unit can choose for itself a most appropriate version of the contextual representation. For the contextual representation, the data obtained by querying an Internet search or an Internet lexicon are preferably prepared and z. B. sent as an Internet page to the client computing unit. In the representation of context information is preferred for various sources of information (eg. As Wikipedia ^®, Google ^®, etc. VouTube ^®) combined and placed in a clear layout for this. Prefers In the context view, chat messages of other users who have viewed or viewed the same media content are also displayed, and preferably a chat user input window of the client computing unit.

The client computing unit is preferably a mobile phone, particularly preferably a smartphone, very particularly preferably a tablet computer.

The own output device of the client computing unit is preferably already integrated directly with the client computing unit.

The representation of the context representation by the client arithmetic unit preferably takes place whenever new data is sent by the arithmetic unit which plays the multimedia content. In another variant, the client arithmetic unit does not receive a ready-to-use contextual description, but only media-related keywords or already at least one fixed search term, whereby the search term is created using the keywords in the first case and contextual information is retrieved from the Internet with this search term and second In this case, contextual information can be obtained directly using the catch term, and these are then preferably displayed using the options available in the client computing unit (eg, browser). If the arithmetic unit is a sending server, the contextual presentation or only the media-related keywords are first transmitted together with the multimedia content to the output device and there z. B. via a network switch or an additional controller that is configured to forward the contextual representation or only the media-related keywords to the client computing unit, separately forwarded to the client computing unit. Alternatively, the presentation of the context representation is performed by an overlay on the arithmetic unit over the multimedia content or generation of a sidebar next to the multimedia content.

Preferably, the client computing unit is registered in the arithmetic unit, for. B. via an HTTP request of the client computing unit, preferably via a software portal that provides the arithmetic unit for access by a client computing unit in a network. Preferably, the registration information comprises a network address and / or information about the displayable resolution and the readable file formats of the client computing unit. In this way, a context representation can be adapted very specifically to the properties of the client computing unit and forwarded to it in a targeted manner.

In a further method according to the invention, the multimedia content ( 20 ) a video, a digital photograph, a piece of music, an audiobook or a video and / or telephone conversation.

In a further method according to the invention, the determination of at least one media-related keyword ( 41 ) by applying a pattern recognition method to the multimedia data ( 21 ).

The application of the pattern recognition method preferably takes place in real time or approximately real time during the output of the multimedia content. In this way, at least one media-related keyword is determined automatically and simultaneously with the display of the multimedia content via pattern recognition.

• – Spracherkennung;
• – Musikerkennung;
• – Bilderkennung;
• – Texterkennung.

In a further method according to the invention, the determining comprises recognizing at least one keyword ( 41 ) by applying one or a combination of the following pattern recognition methods:

• - Voice recognition;
• - music recognition;
• - image recognition;
• - text recognition.

In speech recognition, the language contained in the sound is preferably analyzed and examined for keywords. It is preferred to identify the words of the language contained in the sound and then estimate which of those words carries much information and thus is a useful buzzword or which words are irrelevant. This z. For example, consider the frequency of each word during speech recognition. Less frequent words are those with a high information content and frequently occurring words carry only a low information content and are therefore not selected as a keyword. Preferably, a training is carried out previously based on z. As text documents from the Internet, so that the system can distinguish common words of rare words, such. "And" as a very common word and "Alps" as a rare word. To identify the words in the language is preferred Speech recognition tool used. On the market located speech recognition software has z. As interfaces on the one hand allow input of sound and on the other hand spend the identified words.

In music recognition, the piece of music is preferably identified by tonal features and then information is z. As composer, detail, artist, premiere or release year, etc. as a procured media context associated with it.

The image recognition recognizes preferably semantic contents of an image such. Animal species, well-known buildings, specific landscapes or landscape types (eg desert, sea, forest) or even specific regions (eg Matterhorn, Paris, Eiffel Tower, pyramids etc.). For the image recognition or the music recognition, an external database is preferably used as a reference in which examples of the identifiable objects or music pieces are stored.

The text recognition preferably searches in pictures or moving pictures for text elements, eg. Letters, and then identifies the words present in the picture or moving picture. A keyword is preferably output when, as is the case with speech recognition, a rarely used text or word is used. Preferably, the text recognition is also previously trained by random text documents, so that frequent and not frequent words are known. Preferably, text recognition or speech recognition additionally have a translation module by means of which foreign languages and texts can be recognized, but the keywords can be generated in the language of the user.

In another method according to the invention, the creation of the search term ( 71 ) combining the keywords ( 41 ) by applying different pattern recognition methods to the multimedia data ( 21 ) were determined.

Preferably, the keywords are combined by a simple stringing together. Preferably, a ranking list is formed from the various keywords, of which the high-ranking keywords form a main search term and the remaining keywords are minor search terms. This rank is z. B. on the basis of a value on the hit probability or the probability of a correct identification of the keyword performed, which is preferably supplied by the respective pattern recognition method with the result. Preferably, certain pattern recognition methods, e.g. As speech and text recognition, in principle, and thus get a higher rank for their keywords.

In this way, different pattern recognition methods are combined with each other to determine meaningful search terms. The system is also adjustable by prioritizing certain pattern recognition methods.

In a further method according to the invention, obtaining the media context comprises ( 51 ) performing a search query on the Internet ( 50 ).

For example, a search engine is started with the search term, an Internet lexicon, or z. As a movie, video, image, and / or music / sound database. The result of such search queries is then the media context, which is preferably further processed for the presentation. Such treatment is z. B. summarizing various search results to a displayable web page, zooming out of graphics for display on the client computing unit with limited display capabilities, the sorting out of unrelevant search results, the translation of search results, the creation of a layout that can be displayed device-specific optimized on a display device , Preferably, in the step of displaying the context representation, the properties of the client computation unit are obtained beforehand and the context representation is set to z. B. the computing capacity (eg decoder performance for a video), resolution properties such. As the resolution of the display unit and / or compatibility with certain file formats adapted.

• – eine Recheneinheit (10) zur Ausgabe von Multimediadaten (21), wobei die Recheneinheit (10) folgende Hardware- und/oder Softwaremodule aufweist:
• – eine Ermittlungseinrichtung (40) zum Ermitteln von mindestens einem medienbezogenen Schlagwort (41) aus Multimediadaten (21);
• – eine Abfrageeinrichtung (70) zum Erstellen eines Suchbegriffs (71) aus mindestens einem medienbezogenen Schlagwort (41) und zum Abfragen des Medienkontexts (51) in Abhängigkeit des Suchbegriffs (71);
• – einen Controller (80)

zum Weiterleiten des Medienkontexts (51) an eine Client-Recheneinheit (61) mit eigener Ausgabeeinrichtung (62) und/oder
zum Erzeugen einer Kontextdarstellung (60) des Medienkontexts (51) und zum Weiterleiten der Kontextdarstellung (60) an die Client-Recheneinheit (61) mit der eigenen Ausgabeeinrichtung (62). Sie ist bevorzugt eingerichtet, verschiedene Schlagwörter zu einem Suchbegriff zu kombinieren, besonders bevorzugt eingerichtet, den Suchbegriff an die Client-Recheneinheit und/oder an eine Suchmaschine im Internet weiterzuleiten.The object is further achieved in particular by a device for displaying media context ( 51 ) of a multimedia content ( 20 ), full:

• A computing unit ( 10 ) for the output of multimedia data ( 21 ), wherein the arithmetic unit ( 10 ) has the following hardware and / or software modules:
• - a determination device ( 40 ) for determining at least one media-related keyword ( 41 ) from multimedia data ( 21 );
• An interrogator ( 70 ) to create a search term ( 71 ) from at least one media-related keyword ( 41 ) and to query the media context ( 51 ) depending on the search term ( 71 );
• - a controller ( 80 )

to forward the media context ( 51 ) to a client computing unit ( 61 ) with its own output device ( 62 ) and or
for generating a context representation ( 60 ) of the media context ( 51 ) and to forward the context representation ( 60 ) to the client computing unit ( 61 ) with its own output device ( 62 ). It is preferably set up to combine different keywords to a search term, particularly preferably configured to forward the search term to the client computing unit and / or to a search engine on the Internet.

The interrogator is preferably arranged in the arithmetic unit, which plays and displays the multimedia contents. Alternatively, it is arranged in the client arithmetic unit, wherein the interrogator receives keywords from the arithmetic unit, which displays the multimedia contents and at the same time determines keywords from the multimedia data.

The controller preferably realizes two functions: either it only forwards the media context to the client computing unit so that it itself creates a suitable context representation, or the controller already generates a context representation which is preferably adapted for the client computing unit and forwards the context representation to the client processor. Further processing unit. Preferably, the controller is set up to register and manage client computing units. According to the invention, performing a search query, obtaining the media context, and creating and displaying a contextual representation is feasible in the client computing unit. However, it is likewise provided in a variant that media context is already received by the other arithmetic unit in the client arithmetic unit and this is then displayed as a context representation. In yet another variant, it is provided that only the context representation which was created by the other arithmetic unit can be received and displayed by the client arithmetic unit.

• – eine Bilderkennungseinrichtung (42);
• – eine Audioerkennungseinrichtung (43) für Sprache;
• – eine Audioerkennungseinrichtung (43) für Musik;
• – eine Texterkennungseinrichtung (44).

In a further embodiment of the present invention, the determination device ( 40 ) one or a combination of the following hardware and / or software modules

• An image recognition device ( 42 );
• An audio recognition device ( 43 ) for language;
• An audio recognition device ( 43 ) for music;
• A text recognition device ( 44 ).

The image recognition device is z. For example, an image identification device that uses a database with reference images classifies the reference images based on a test image and thus a statement about the content of an image (objects to see, landscape, city, type of buildings, which and how many living things, etc.).

An audio recognition device for speech is z. As a speech recognition software, which has an interface for audio signals and then analyzes these and outputs recognized words.

The audio recognition device for music is preferably a software that has an input for music signals and then assigns them based on tonal characteristics certain pieces of music and then outputs them as a result.

A text recognition device is preferably a device that recognizes letters in an image and thus outputs recognized words.

In a further embodiment of the present invention, the interrogator ( 70 ) has an interface to an Internet search service.

The invention will now be further illustrated by way of example with reference to the drawings. Hereby show:

1 an overview of a method and a device according to the invention,

2 a detailed view of the steps determining the media-related keyword, creating a search term and obtaining the media context and the components required for it, using a combination of different pattern recognition method is applied

3 an overview of an inventive method and a device according to the invention wherein the arithmetic unit is a transmission server.

1 shows an overview of a method according to the invention and a device according to the invention.

An output device 30 is with a computing unit 10 connected. The arithmetic unit 10 has a determination device 40 for determining at least one media-related keyword 41 , an interrogator 70 to create a search term 71 and to query the media context 51 as well as a controller 80 for forwarding the media context and / or for generating a context representation 60 the media context and to forward this context representation 60 on. The arithmetic unit 10 is with a network 50 connected. Furthermore, the arithmetic unit 10 with a client computing unit 61 with output device 62 connected by radio. The client processing unit 61 in this example is a smartphone, the network 50 the Internet, the device 30 an LCD screen, the arithmetic unit 10 a set-top box.

In the operation of the invention, the arithmetic unit 10 a media content 20 , which in this example is a stream of a digital television signal, on the output device 30 out. At the same time, the determination device determines 40 Media-related keywords 41 from the media data 21 , These are sent to the interrogator 70 forwarded where a search term 71 from the media-related keywords 41 generated and over the network 50 is forwarded to a search engine or an online encyclopedia. As a result, the interrogator receives 70 the media context 51 and forwards it to the controller 80 further. This creates from the media context 51 a contextual representation 60 and sends them to the client processing unit 61 continue where these on the output device 62 is shown. The client processing unit 61 divides the arithmetic unit 10 with what resolution through the client processing unit 61 can be displayed and which file formats are readable, and to which address the context presentation is to be forwarded.

In this way context information is obtained for a current TV program. This need not previously in the media content z. B. as metadata, but the determination unit 40 determines purely from the information known in the normal television signal media-related keywords. By passing on the contextual representations 60 a client computing unit 61 receives the viewer of the media content on a separate screen and only visible to him, if he the smartphone z. B. holds to his body, the contextual information displayed, and other viewers and also he will not by a contextual display on the output device 30 disturbed. In addition, the viewer does not have to search for the contextual information himself, eg. B. via input to his phone, but he receives it automatically by launching a particular application, which then the contextual information from the arithmetic unit 10 preferably as a finished context representation receives.

2 shows a detailed view of the steps determining the media-related keyword, creating a search term and obtaining the media context and the components necessary for it, using a combination of different pattern recognition method is applied. The determination device 40 here has an image recognition device 42 an audio recognition device 43 , a text recognition device 44 and a metadata extractor 45 on. In an optional variant, the audio recognition device 43 and the image recognition device 42 each with a database 43.1 respectively 24.1 connected. The polling device 70 has a combination device 72 on.

In operation of the invention, the detection or extraction devices receive 42 - 45 the currently playing multimedia data 21 , These will then be through these facilities 42 - 45 analyzed and become keywords 41 extracted from it. The metadata extraction device 45 reads the metadata that may already be contained in the multimedia data and delivers them as media-related keywords. In the combination device 42 becomes a search term from the various received media-related keywords 71 educated.

In this way, various media information is obtained from the multimedia data by various recognition methods or extraction methods 21 and then this to a search term 71 summarized. This results in a higher yield of suitable media context.

3 shows an overview of a method according to the invention and a device according to the invention wherein the arithmetic unit 10 a sending server is over a sending network 82 (eg DVB-T or IP-TV) with the display device 30 and the client computing unit 61 connected is. An additional controller is in between with the broadcast network 82 connected as well as with the client computing unit 10 and the display device 30 ,

In operation of the invention, the auxiliary controller disconnects 81 the multimedia data 21 from the context representation 60 and directs the context representation 60 to the client computing unit 10 further. About the additional controller 81 communicates the client computing unit 61 with the controller 80 of the sending server 10 to convey suitable information for an adaptation of the context representation.

In this way, those for the analysis of multimedia data 21 necessary, computationally intensive operations in the investigator 40 be executed on a central processing unit 10 relocated. On the side of the receiving device 30 and the client computing unit 61 a lower computing capacity is sufficient. Furthermore, the requests are in the network 50 by the polling device 70 be bundled and, in the case of many users, the same multimedia content with different display devices 30 consider the network load compared to a decentralized variant, such. In 1 , reduced.

With this invention, a method and a suitable device has been pre-ordered, by means of which keywords are automatically extracted from displayed multimedia contents, so that neither the viewer would have to actively extract such keywords and search nor that the provider of a multimedia content such keywords in the multimedia content z. B. integrated as metadata. The keywords are then used to form a search term, which is then a media context, e.g. B. is obtained from the Internet, the user is provided. Here, the media context is displayed as a contextual representation on a separate client computer unit, so that the display of the context does not bother the existing viewers while viewing the multimedia content and each viewer can personally even more deepen his own multimedia contexts by selecting even more detail. For this purpose, in the creation of the contextual representation is preferred to the circumstances of the client computer unit such. B. resolution or computing capacity and compatible file formats taken into account. The extraction of keywords from the multimedia contents is preferably carried out by the use of various pattern recognition methods, so that in a multimodal way keywords from the multimedia content are detected. This increases the likelihood of a suitable media context that interests the user. reference numeral 10 computer unit 20 media content 21 multimedia data 30 output device 40 determining device 41 Media-related keyword 42 Image recognition device 42.1 Image Database 43 Audio detection device 43.1 Audio database 44 Text recognition device 45 Metadata extraction means 50 network 51 media context 60 context representation 61 Client computing unit 62 output device 70 interrogator 71 search term 72 combiner 80 controller 81 additional controller 82 Broadcast network

Claims (9)

Method for Displaying Media Context ( 51 ) during the output of a multimedia content ( 20 ) by a computing unit ( 10 ), comprising the steps of: - outputting multimedia data ( 21 ) to an output device ( 30 ); - determining at least one media-related keyword ( 41 ); - Create a search term ( 71 ) from at least one media-related keyword ( 41 ); - obtaining the media context ( 51 ) depending on the search term ( 71 ); - Representation of the media context ( 51 ) as a context representation ( 61 ) by a client computing unit ( 61 ) with its own output device ( 62 ). Method according to one of the preceding claims, wherein the multimedia content ( 20 ) is a video, a digital photograph, a piece of music, an audiobook or a video and / or telephone conversation. Method according to one of the preceding claims, wherein the determination of at least one media-related keyword ( 41 ) by applying a pattern recognition method to the multimedia data ( 21 ) he follows. The method of claim 3, wherein the determining comprises recognizing at least one keyword ( 41 by using one or a combination of the following pattern recognition methods: speech recognition; - music recognition; - image recognition; - text recognition. Method according to one of claims 3 to 4, wherein the creation of the search term ( 71 ) combining the keywords ( 41 ) by applying different pattern recognition methods to the multimedia data ( 21 ) were determined. Method according to one of the preceding claims, wherein obtaining the media context ( 51 ) performing a search query on the Internet ( 50 ). Device for displaying media context ( 51 ) of a multimedia content ( 20 ), comprising: - a computing unit ( 10 ) for the output of multimedia data ( 21 ), wherein the arithmetic unit ( 10 ) comprises the following hardware and / or software modules: - a determination device ( 40 ) for determining at least one media-related keyword ( 41 ) from multimedia data ( 21 ); An interrogator ( 70 ) to create a search term ( 71 ) from at least one media-related keyword ( 41 ) and to query the media context ( 51 ) depending on the search term ( 71 ); - a controller ( 80 ) - to forward the media context ( 51 ) to a client computing unit ( 61 ) with its own output device ( 62 ) and / or - to generate a context representation ( 60 ) of the media context ( 51 ) and to forward the context representation ( 60 ) to the client computing unit ( 61 ) with its own output device ( 62 ). Apparatus according to claim 7, wherein the determining means ( 40 ) one or a combination of the following hardware and / or software modules: - an image recognition device ( 42 ); An audio recognition device ( 43 ) for language; An audio recognition device ( 43 ) for music; A text recognition device ( 44 ). Device according to one of claims 7 to 8, wherein the interrogator ( 70 ) has an interface to an Internet search service.

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