Patent Publication Number: US-8543940-B2

Title: Method and apparatus for browsing media content and executing functions related to media content

Description:
PRIORITY 
     This application claims priority under 35 U.S.C. §119(a) to a Korean Patent Application filed in the Korean Intellectual Property Office on Oct. 23, 2009 and assigned Serial No. 10-2009-0101248, the entire disclosure of which is incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to media content, and more particularly, to a method and apparatus for browsing (or viewing) media content and executing functions related to the media content. 
     2. Description of the Related Art 
     With the development of a ubiquitous environment, a user&#39;s demand for a media content comprised of digital data has increased. The media content may include audio data, image data, moving picture data, text data, 3-Dimensional (3D) data, and the like. 
     As devices which can store and reproduce media content, for example, an MPEG Layer 3 (MP3) player, a Personal Media Player (PMP), a mobile communication terminal, a personal computer, a notebook computer, and a digital television have increased the capacity of data which they can store, the amount of storable media contents has also been increased and, thus, it has become difficult to manage such media content. Furthermore, such devices reproduce many types of media content rather than one type of a media content, the types and capacity of media content stored on the devices have increased. 
     Generally, a browser for browsing and searching media content uses a scheme for providing lists of names of media content and brief information about the media content or a scheme for listing thumbnail images related to the media contents. 
     However, schemes for simply providing only the name lists or listing the related thumbnail images may not interest users and, in any case, cannot accurately transmit information about the media content. 
     In the case of a browser, used to provide name lists, users may not know the details of the media content by seeing only the names of the media content. For example, if media contents are image files or audio files, it is not easy to accurately distinguish the image files or the audio files by only the file names where there are many other such files stored on a device. 
     As another example, in the case of a browser listing thumbnail images of image files, files may be distinguished by the thumbnail images but detailed information related to a specific file may not be available as only the thumbnail is shown. Namely, user manipulation should be needed to confirm information about a specific file. Moreover, spaces between the thumbnail images generated when listing the thumbnail images waste space on a display area. 
     SUMMARY OF THE INVENTION 
     An aspect of the present invention is to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention provides a method and apparatus for browsing a plurality of media content, wherein user manipulation is easy. 
     Another aspect of the present invention provides a method and apparatus which can easily distinguish between a plurality of media content and can efficiently transmit information related to the media content. 
     Another aspect of the present invention provides a method and apparatus, which can easily and quickly select a desired media content from among a plurality of media contents. 
     Another aspect of the present invention provides a method and apparatus which can quickly execute functions related to a media content selected by a user. 
     In accordance with an aspect of embodiments of the present invention, a method for browsing a media content and executing functions related to the media content by a browser device includes displaying a collage image generated by combining a plurality of image elements corresponding, respectively, to a plurality of media contents, if a selection input is generated on the collage image; obtaining one or more elements of an image element and a text element corresponding to a location of a point where the selection input is generated; and configuring a preview window for a specific media content using the one or more elements to overlay the preview window on the collage image, wherein the text element corresponds to the specific media content and includes information about the specific media content. 
     The method further includes, if a function execution input is generated on the collage image, obtaining a text element corresponding to a location of a point where the function execution input is generated, and performing a representative function using a media content related to the obtained text element according to information about the representative function included in the obtained text element. 
     The method further includes, if a function icon included in the preview window is selected, performing a function corresponding to the function icon using the specific media content corresponding to the obtained one or more elements. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee. 
       The above and other aspects, features and advantages of certain embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a block diagram illustrating a configuration of a browser device according to an embodiment of the present invention; 
         FIG. 2  is a flow chart illustrating an operating process of a browser UI generator according to an embodiment of the present invention; 
         FIG. 3  is a block diagram illustrating a browser UI generating process according to an embodiment of the present invention; 
         FIG. 4  is a diagram illustrating a collage image generating process according to an embodiment of the present invention; 
         FIG. 5  is a diagram illustrating a gray level map according to an embodiment of the present invention; 
         FIG. 6  is diagram illustrating a collage image editing process according to an embodiment of the present invention; 
         FIG. 7  is a flow chart illustrating a browser UI driving process according to an embodiment of the present invention; and 
         FIGS. 8 to 10  are diagrams illustrating examples of browser UI execution related to various types of media content according to an embodiment of the present invention. 
     
    
    
     Throughout the drawings, the same drawing reference numerals will be understood to refer to the same elements, features and structures. 
     DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION 
     Reference will now be made in detail to the embodiments of the present invention with reference to the accompanying drawings. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without such specific details. 
     The present invention provides a media content browsing and executing method and apparatus to improve functions for browsing, searching, or executing various types of media contents and provides a browser User Interface (UI) which can quickly and effectively browse, search, and select a media content and can easily execute the selected media content. 
     Media content is comprised of audio data, image data, moving picture data, text data, 3D data, etc according to its type. Therefore, in the present invention, media content may be one of an audio file, an image file, a moving picture file, a text file, and a 3D image file. A plurality of media contents may be a plurality of files, each file representing media content. 
     A media content device for reproducing the media content and providing the media content in a form which can be recognized by users may be an MP3 player, a PMP, a mobile communication terminal, a personal computer, a notebook computer, a digital television, an electronic dictionary, a Personal Digital Assistant (PDA), etc. Accordingly, the present invention may be applied to various types of media content devices including not only the above-described devices and but also devices which are not mentioned above. 
     A media content browser UI, according to the present invention, uses a collage image. The collage image is one image generated by combining a plurality of images. According to an embodiment of the present invention, images corresponding to a plurality of media contents to be browsed are used to generate one collage image, and these images are referred to as image elements. 
     Moreover, a text file is generated which corresponds to each of a plurality of media contents to be browsed and includes information about a media content, and such a text file is referred to as a text element. 
     In the present invention, a metadata file is generated including link information between an image element, constituting a collage image, and a text element related to the image element. The collage image and the metadata file constitute a browser UI for searching a plurality of media contents corresponding to the collage image. 
     If the browser UI, according to the present invention, is activated, a collage image is displayed on a screen of a multimedia content device. The collage image maintains the uniqueness of each of the image elements and simultaneously provides a plurality of image elements to a user. The collage image can be generated using an entire display area of the device and thus a screen resolution of the device can be effectively used. The collage image is particularly effective when it is used in a portable device. 
     In the present invention, an image element and a text element, corresponding to a location of a pointer on a collage image, are confirmed using a metadata file, and using the confirmed image element and text element, text identification information about a specific media content is provided or preview information including brief information about a specific media content is provided. Accordingly, it is possible to simultaneously compare a plurality of media contents. Namely, a plurality of media contents can be browsed through a collage image and simultaneously a large amount of media contents can be reviewed. 
     Moreover, functions related to a specific media content can be executed at the request of users. Therefore, media content functions can be quickly executed. 
     An example of a browser device for browsing and executing a media content to which the present invention is applied is illustrated in  FIG. 1 . The browser device, according to the present invention, may be included in the above-described devices. 
     Referring to  FIG. 1 , the browser device includes a controller  10 , a user input unit  20 , a memory  30 , and a display  40 . 
     The user input unit  20  provides input data generated according to user manipulation to the controller  10  and may be a keypad or a mouse, including function keys, numeral keys, and arrow keys. 
     The display  40  displays various media contents. 
     The memory  30  stores programs, storage data, which can be updated, and reference data, to process and control the controller  10 , and is provided as a working memory of the controller  10 . 
     The memory  30  stores various media contents. For example, the memory  30  may store a plurality of audio files, a plurality of image files, a plurality of moving picture files, a plurality of text files, and a plurality of 3D image files. The audio files may be music files or recorded files. The image files may be images generated through a camera or externally downloaded images. The moving picture files may be music moving picture files or film files. The text files may be document files, or phonebook data in which telephone numbers are registered. In the case of a phonebook, one text file may be present, corresponding to a registered name entry or a phone number. For example, one or more access numbers, address, note, anniversary date, etc., which are stored in the phonebook relating to one name entry, are included in one text file. Therefore, the phonebook includes one or more text files. 
     The memory  30  stores image elements, text elements, collage images, and metadata files generated according to an embodiment of the present invention. 
     An image element is used to generate a collage image and is generated to correspond to each of a plurality of media contents to be browsed. An example of the image element which may be generated according to a type of a media content is as follows. If the media content is an image file, then the image element may be a thumbnail, and if the media content is a moving picture file, then the image element may be an album art image, a film poster, a screen shot, or an arbitrary frame image. If the media content is an audio file, then the image element may be a cover image of a music album or a picture of a singer. If the media content is a phonebook, then the image element may be a face picture of a person corresponding to a name entry registered the phonebook. If the media content is a 3D file, then the image element may be a 2D projection of the 3D file. 
     A text element refers to an information file of each of a plurality of media contents to be browsed and is generated to correspond to each of a plurality of media contents. An example of the text element, which may be generated according to a type of media content is as follows. If the media file is an image file, then the text element may be a date or time when the image file is generated or stored, or a location, file name or resolution of the image file. In the case of the media content of a moving picture file, the text element may be a file name, title, director name, running time, resolution, or casting. In the case of the media content of an audio file, the text element may be a file name, album name, musician, writer, or singer. In the case of the media content of a text file, the text element may be a file name or saving time of the text file. In the case of the media content of a phonebook, the text element may be a name, address, access number, email address, home address, birthday, anniversary date, or note. In the case of the media content of a 3D file, the text elements may be information about a title, the number of frames, or geometry. 
     A collage image is an image generated by combining of a plurality of image elements. The capacity of the collage image is determined according to the number of image elements included in a single collage image. A display of a device is almost a rectangular shape and thus a rectangular collage image may be generated. To effectively browse and emphasize image elements included in a collage image, it is desirable that the resolution of an image element is above a reference value. In the present invention, the reference value is expressed as W×H (where W denotes the width of an image element and H denotes the height of an image element). 
     Therefore, the size of an image element obtained from an arbitrary media content is adjusted to be suitable for the reference value. It is desirable that a collage image be generated to cover a maximum display area. Thus, if the resolution of a screen is A×B, a capacity N of a collage image may be determined by the following Equation (1). 
     
       
         
           
             
               
                 
                   N 
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                         A 
                         W 
                       
                        
                     
                     × 
                     
                        
                       
                         B 
                         W 
                       
                        
                     
                   
                 
               
               
                 
                   ( 
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     In Equation (1), |X| denotes a maximum integer less than or equal to X (i.e. the floor). Accordingly, if the total amount of image elements corresponding to a target media content is greater than N, a plurality of collage images will be generated. Although the maximum number of image elements which can be included in one collage image may be restricted, a collage image can be generated by a plurality of image elements having the maximum number or less. One or more collage images may be present. 
     The controller  10  controls the overall operation of the browser device and includes a browser UI generator  11  and a browser UI driver  12  according to an embodiment of the present invention. The browser UI generator  11  can browse, search, and select a media content and controls the generation of a browser UI which can input execution commands for functions related to the selected media content. The browser UI driver  12  drives the browser UI and controls the operation of the browser device according to the driving of the browser UI. 
     Although an embodiment of the present invention has described the browser UI generator  11  and the browser UI driver  12 , which are included in the controller  10 , in other embodiments of the present invention, the browser UI generator  11  and the browser UI driver  12  may be configured such that they are separated from the controller  10  and are linked with the controller  10  in operation. 
     A browser UI generating process by the browser device configured as described above will now be described with reference to  FIG. 2 .  FIG. 2  illustrates a browser UI generating process by the browser UI generator  11 , according to an embodiment of the present invention. 
     According to the present invention, a user may author a browser UI of a media content to be searched. Therefore, the browser UI generator  11  of the browser device may provide an authoring tool related to the generation of the browser UI through the display  40  to a user. Then the user may designate, through the authoring tool, a plurality of media contents to be browsed. 
     Then the browser UI generator  11  generates an image element and a text element corresponding to each of the designated plurality of media contents in step  101 . The image element and text element may be automatically generated or may be configured by a user. 
     In other words, a user may also designate a type of information to be included in the image element and text element corresponding to each media content. For example, if the media content is an image file, an image element of a thumbnail may be automatically generated. However, if a user designates a specific part of each image file as an interested part, an image element of the interested part may be generated. If the media content is a moving picture file regarding a movie, an image of a poster of the movie may be automatically generated but an image corresponding to an arbitrary frame of the moving picture file may be designated as an image element by a user. 
     Any one piece of information included in the text element may be determined as representative information. The representative information indicates information displayed in correspondence to an image element at which a point is located when the pointer is located on a collage image under the state that the collage image is displayed by the driving of the browser UI. It is desirable to set minimum identification information of a media content, like a file name corresponding to the media content. The contents of information designated as the representative information may be directly selected by a user or a user may not set the representative information. The representative information is included in text element. 
     The text element includes one or more pieces of function information, which can be executed using media content. For example, the text element for an audio file may include audio play function information, the text element for a moving picture file may include moving picture play function information, the text element for an image file may include image editing function information, and the text element for a phonebook may include sending function information. A representative function may be automatically set or may be designated according to a user&#39;s selection. 
     If the image element and text element have been generated, the browser UI generator  11  generates a collage image using a plurality of image elements in step  103 . When the collage image is generated, locations of the image elements may be randomly determined or a user may designate the locations of the image elements on the collage image. For example, the browser UI generator  11  may display a collage image arrangement pattern  301  as shown in  FIG. 4 . A user may move the locations of image elements on the arrangement pattern  301  of the collage image. According to a request to generate a collage image, a first collage image  303  may be generated. The collage image is generated by overlapping a partial region of a plurality of image elements and it is desirable that a boundary between the image elements be processed by blending processing. However, the present invention may use various collage image generating algorithms. 
     Referring back to  FIG. 2 , if the collage image has been generated, the browser UI generator  11  generates a metadata file from the collage image in step  105 . In other words, if each image element region of the collage image arrangement pattern is filled with an image element, a pixel of the image element region corresponds to one image element. Accordingly, a pixel in a final collage image may have one label corresponding thereto. 
     The metadata file includes a label map for each pixel belonging to the collage image. The metadata file may link each pixel of the collage image and an image element corresponding to each pixel. A gray level of an image element may be used as a label of each pixel. An example of a label map using a gray level is shown in  FIG. 5 .  FIG. 5  illustrates gray levels of a collage image comprised of 7 image elements. 
     For example, assuming there are a plurality of image elements is I={I1, I2, I3 . . . I7}, a metadata file is M1, a location of a pixel using 2D coordinates is (x,y), and different gray levels within metadata are g={g1, g2, g3 . . . g7}. In this case, each gray level corresponds to one image element. For instance, a gray level g1 corresponds to an image element I1 and a gray level g2 corresponds to an image element I2. In the pixel location (x,y), a gray level is obtained from metadata and an image element related to the gray level can be identified. 
     In this way, the metadata file adds a gray level to location coordinates of each pixel of a collage image as a label and includes information about an image element corresponding to a gray level. The metadata file may include identification information about a text element related to each image element. 
     If the metadata file has been generated, the browser UI generator  11  configures a browser UI by grouping the collage image, the metadata file, the image element, and the text element in step  107 . 
     After the browser UI is generated, a user may edit the collage image. If the collage image is edited after the browser UI is generated, a metadata file related to the edited collage image is updated. An image element may be newly added to or may be deleted from the browser UI. Moreover, the location of the image element may be moved. The addition of the image element means that a content media to be searched is added and the deletion of the image element means that a content media is excluded from a management target of the browser UI. 
     If there is a request of a user for the editing of the collage image in step  109 , the browser UI generator  11  changes the browser UI according to the editing in step  111 . 
       FIG. 6  illustrates an example of a collage image editing process after the browser UI is generated. A reference numeral  320  denotes the case where a new image element is added to the left upper side of a second collage image  310 . A reference numeral  330  denotes the case where a landscape image element  311  is deleted from the second collage image  310 , and a reference numeral  340  denotes the case where the location of a girl image element is moved from the right middle part of the second collage image  310  to the left lower part thereof. 
     The browser UI generating process described above is illustrated in  FIG. 3  as a framework block. Referring to  FIG. 3 , an image element  220  and a text element  230  are generated from a media content  210 . A collage image  240  and a metadata file  250  are generated from the image element  220 . The image element  220 , the text element  230 , the collage image  240 , and the metadata file  250  are grouped to configure a browser UI  260 . A specific function  270  is executed through the browser UI  260 . 
     A browser UI driving process by the browser UI driver  12  according to an embodiment of the present invention is illustrated in  FIG. 7 . 
     Referring to  FIG. 7 , the browser UI driver  12  displays a collage image in order to provide a browser UI in step  401 . A user may change the location of a pointer on the collage image while browsing the displayed collage image. The pointer may be expressed by an indicator of an arrow shape or a cursor. The pointer may be moved through the manipulation of an arrow key or a mouse. 
     The browser UI driver  12  detects the location of the pointer on the collage image in step  403 . The location of the pointer may be detected as a coordinates (x,y). The browser UI driver  12  acquires a gray level corresponding to the detected location of the pointer by using a metadata file in step  405 . The UI driver  12  can identify an image element by acquiring the gray level. 
     The browser UI driver  12  confirms whether representative information is set to the image element corresponding to the gray level in step  407 . If the representative information is set, the browser UI driver  12  overlays a representative information window on the collage image in step  409 . For example, if a media content related to a currently driven browser UI is an image file, the file name of the image file may be set as the representative information. In this case, the file name of the image file corresponding to the image element at which the pointer is located is included in the representative information window and is displayed on the location of the pointer. If no representative information is set in step  407 , the browser UI driver  12  proceeds to step  411 . 
     The browser UI driver  12  confirms whether a selection input occurs in step  411 . The selection input may be, for example, a user input such as a single click of a mouse. If the selection input is generated, the browser UI driver  12  acquires, in step  407 , an image element or a text element corresponding to the gray level obtained in step  405 . The browser UI driver  12  configures a preview window using the acquired image element and text element in step  419 . The preview window may be configured such that an image element is located on the left side thereof and a text element is located on the right side thereof. The preview window is overlaid on the collage image. In the above example, although information about the text element is included in the preview window, the preview window may include either only the image element or only the text element. Alternatively, the preview window may include an execution icon for a function which can be executed using a media content corresponding to a specific image element. For example, if the media content is an image file, a display icon or an editing function icon of the image file may be included in the preview window. In the case of an audio file, a play icon may be included in the preview window. The preview window may include a cancel icon, which can cancel a display of the preview window. 
     The browser UI driver  12  confirms whether the function execution icon is selected under the state that the preview window is overlaid in step  421 . If the function execution icon is selected, a function corresponding to the selected icon is executed in step  423 . The browser UI driver  12  confirms whether the cancel icon is selected in step  425 . If it is selected, the browser UI driver  12  exits the preview window in step  427  and returns to step  403 . 
     Meanwhile, in step  411 , the selection input may not be generated and instead, a representative function execution input may be generated. The representative function execution input may be, for example, a double click. That is, a double click may occur without any selection under the state that the pointer is located on the collage image. If such a representative function execution input is generated in step  413 , the browser UI driver  12  executes a representative function, which is set corresponding to an image element corresponding to a gray level of a location where the double click occurs. If a media content is a phonebook, the browser UI driver  12  may make an outgoing call using a telephone number which has been registered in relation to a name corresponding to an image element of a location where the double click is generated. 
     Detailed operating scenarios according to the control of the browser UI will now be described with reference to  FIGS. 8 to 10 .  FIG. 8  illustrates the execution of the browser UI related to an image file,  FIG. 9  illustrates the execution of the browser UI related to a moving picture file of a film, and  FIG. 10  illustrates the execution of the browser UI related to a phonebook. 
       FIG. 8  illustrates the execution of an image browser UI. The image browser UI is configured as follows. A group of image elements corresponding to a group of image files are used to generate a collage image. A gray level label is added to each pixel of an image element region arranged on the collage image, thereby generating a metadata file. In this embodiment, it is assumed that a text element is omitted. This is because, in the case of an image file, it is possible to browse and search an image even though the text element is omitted. The image browser UI is configured by grouping the image element, the metadata file, and the collage image. 
     As the image browser UI is provided to a user, a pointer is displayed, as in an image  510 , under the state that a collage image  500  is displayed. If a user clicks on any location where the pointer is positioned on the collage image, the UI driver  12  senses that a selection input has occurred. Then, the UI driver  12  chooses an image element related to the clicked point from the metadata file. If a coordinator of the clicked point is (x,y), a gray level within the metadata file may be represented as g=MI(x,y). Since the gray level is mapped to the image element, the gray level is used to obtain the image element. The obtained image element is included in a preview window and is overlaid on the collage image as an image  520 . 
     If a click is generated again on the image  520 , the UI driver  12  determines the execution of a function and displays an image file of the clicked point on the entire screen as an image  530 . If a click is sensed on a part except for a preview window region, the UI driver  12  exits the preview window as in the image  500 . 
     If a user double-clicks on any location where the pointer is positioned on the collage image, the UI driver  12  determines that a representative function execution input has occurred and displays an image file corresponding to double-clicked location on the entire screen as in the image  530 . A “Done” icon is clicked to change the state of the image browser UI to a collage image display state. 
     A moving picture browser UI will now be described with reference to  FIG. 9 . 
     An album art, DVD cover or screenshot image is collected from each moving picture file. Such image is an image element related to each moving image file. A text element including information about a moving picture file, such as a title, director, genre, running time, resolution, or casting, is generated for each moving picture file. A collage image is generated using image elements obtained from moving picture files. A label, that is, a gray level, is allocated to each pixel of the collage image and an image element is mapped to each gray level, thereby generating a metadata file. 
     If the moving picture browser UI is provided, a moving picture collage image  600  is displayed. If a mouse is moved on the moving picture collage image, a title of a video clip corresponding to the location of the mouse. That is, representative information may be displayed as in an image  610 . In other words, location coordinates (x,y) of a pointer on the collage image is determined and a gray level is obtained from the metadata file using the location coordinates. The representative information is obtained from a text element related to the gray level and is overlaid on the moving picture collage image with being included in a representative information window as in the image  610 . 
     If a single click is generated in the state that a preview window is displayed, an image element and a text element are acquired using the location coordinates (x,y) of a point where the click is generated. Then the preview window is configured and is overlaid on the collage image as an image  630 . If a double click is generated, a moving picture file corresponding to the clicked point is played as an image  640 . 
     If a “play” icon is selected on the image  630 , a video file is played as in the image  640 . If the video file has been played or a cancel icon is selected, the moving picture collage image  600  is displayed. 
     A phonebook browser UI will now be described with reference to  FIG. 10 . 
     The phonebook browser UI may be used as a tool for browsing a phonebook stored in, for example, a cellular phone and making a call. If a face image corresponding to a name entry of the phonebook is designated, an image element is generated using the face image. Moreover, a text element is generated including a name, address, telephone number, birthday, or facsimile number and the generated text element is linked with the face image element. A collage image is generated using face image elements and a label is added to each face image element and each pixel of the collage image, thereby generating a metadata file. 
     If a phonebook browser UI mode is set, a collage image  700  is displayed. As a pointer on the collage image is moved, current location coordinates of the pointer is identified. A gray level is obtained using the location coordinates from the metadata file and a text element related to the gray level is identified to obtain representative information, that is, a name. The obtained name is included in a representative information window and is overlaid on the collage image as an image  710  and an image  720 . 
     Under such a state, if a single click is generated, a text element is obtained using location coordinates of the clicked point and a preview window including information of the text element is configured and is overlaid on the collage image as an image  730 . 
     If a “call outgoing” icon is selected, an outgoing call is made as an image  740 . 
     If a double click is generated on the collage image, a call outgoing operation may be performed using a telephone number registered in a name entry corresponding to a location where the double click is generated as the image  740 . 
     According to embodiments of the present invention, user manipulation for browsing and selecting a plurality of media contents can be simplified and each media content can be easily identified. Information about media contents can be effectively transmitted and functions related to a media content selected by a user can be quickly executed. 
     Although the embodiments of the present invention have been disclosed for illustrative purposes, various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. For example, different types of media contents may be provided through one browser UI. Accordingly, the scope of the present invention should not be limited to the description of the embodiment, but defined by the accompanying claims and equivalents thereof.