Abstract:
The present invention concerns a method for displaying a program guide is proposed. The program guide contains a list of channels and a time scale and the programs which are receivable within a time represented by the time scale are displayed. The programs which are displayed correspond to the channel on which the programs are received. The inventive method further contains the following steps:
       checking if a specific program is selected,   if a program is selected, checking if the time scale includes the start time and the end time of the program,   if the time scale does not include the start time or the end time of the program, adapting the time scale such that it includes the start time and the end time of the program, and   displaying the program guide using the adapted time scale.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a method for filtering a content menu of a receiver for audio/video content. 
       BACKGROUND OF THE INVENTION 
       [0002]    In current applications, i.e. in a receiver for digital audio/video content, a feature setup is done in a page of the user menu, wherein that page represents the functionality of the feature. Feature setup does mean e.g. the definition of user profiles, the definition of settings of a settop box or the definition of an electronic program guide filter function or a search function. In known devices, a popup contextual menu or a dedicated area on a screen is used for this feature setup. Typically, on a page from a video on demand (VoD) catalogue, filtering options are available in the catalogue itself. Thus, a user first has to navigate to the VoD page and select this page, and afterwards a dedicated menu is presented for selecting and buying a video. The menu is dedicated and opened in the video on demand content. In a remote control as known in the art, specific control buttons exist for navigating in these menus. For a video on demand menu, a “buy” button may exist. For a teletext (videotext) menu, specific buttons exist for fast navigation (usually a red, green, yellow and blue button), a button for switching on and off the teletext, as well as a button for displaying the teletext in a transparent manner in front of the respective program. These dedicated control buttons make a remote control complicated and with increasing functionality of a receiver device, the number of buttons needed on the remote control also increases. In addition, in a gesture control device or gyroscopic device, in general no or only a few buttons are foreseen. 
         [0003]    On the other hand, in some devices the dedicated menu buttons are displayed on the screen when a user has activated the corresponding menu and the user navigates using the arrow keys of his remote control (“→”, “⇑”, “⇓”, “←”) and the “ok” button for virtually pressing the keys presented on the screen. 
         [0004]    Displaying dedicated buttons on the screen is uncomfortable for the user in case a gesture control or gyroscopic control is used, because pointing at a specific area on the screen is not possible in this case. In a gesture control or gyroscopic control, the controlling and command functionality is realized by movements. These movements are transformed into specific commands. Thus, a menu is needed which can be operated with such a control. 
       SUMMARY OF THE INVENTION 
       [0005]    One problem solved by the invention is to find a way of remote controlling of a multimedia receiver having increased functionality such as filtering functionality for EPGs without the need of many buttons on the remote control. 
         [0006]    According to the invention, a method for filtering a content menu containing a list of items is proposed. The method contains the steps of:
       detecting a first direction user input;   selecting a first filter value in a first hierarchy in response to the detected direction;   automatically memorizing the first filter value and filtering the content menu according to the first filter value;   automatically providing at least second filter values to be selected;   detecting at least a second direction user input;   selecting at least a second filter value in response to the detected at least second direction;   automatically memorizing the at least second filter value and filtering the content menu according to the first and the second filter value,   displaying the filtered content.       
 
         [0015]    This has the advantage that it allows users to use new means of interaction with the user interface such as a gyroscopic control or a gesture control without sacrificing ergonomy, and even have a very intuitive application setting that is always present at the same place. The same type of movement is used for control, independently of the type of menu which is controlled. Another major advantage of the inventive method is to enable the feature itself to use any visible space available. Thus, the method reduces the space needed to display contents and it introduces new navigation concepts, which may not be consistent with the global application concepts. Further, the global navigation consistency is improved as navigation is performed in the hierarchy level of the main menu. 
         [0016]    According to the invention, the method is applied in case of a device which is controlled by gesture control. Examples for gesture control are gyroscopic control, tracking of the movements of the user&#39;s hands or fingers, e.g. by a camera or by a touch screen on which the user moves his fingers. In case of gesture control, only a few buttons are available. Unlike a traditional remote control, no buttons are provided for dedicated menus, e.g. a separate teletext button or navigation buttons (red, green, blue, yellow) for the teletext menu. Thus, a user interface must be operable using only standard functions, which are available in the main menu. The invention has the advantage that for an electronic program guide or for a library for video on demand content no dedicated menus are needed, because the whole control is exported to the main menu and the user interface is consistent with the main menu functions. In addition, the invention has the advantage that there is no need to present these specific buttons virtually on the screen. This is advantageous, because in case a gesture control is used, it is almost impossible for a user to press a specific button displayed on the screen using his gesture control device. In case of a gesture control, a direction to which a user points can be easily recognized but no specific point can be pointed at. The invention provides an interface which can be operated just by interpreting the directions in which a user moves his hand or control device. 
         [0017]    Advantageously, the method is used for filtering the content menu in an electronic program guide or video on demand library. 
         [0018]    The invention further concerns a control device for filtering a multimedia content menu. The content menu contains a list of items to be filtered. The control device comprises:
       a first filter for filtering the content menu according to a first filter value in a first hierarchy, the first filter value being selected by indicating a direction;   a second filter for filtering the content menu according to a second filter value in a second hierarchy, the second filter value being selected by indicating a direction;   a display device for displaying the filtered content menu.       
 
         [0022]    Advantageously, the filters are displayed using a 3D representation on different level of depth for including and excluding filters and activating or inactivating settings. 
         [0023]    The invention is described below using an electronic program guide received by a broadcasting receiver as an example. It is apparent to a person skilled in the art that the invention is applicable within program guides for other applications. 
         [0024]    For better understanding the invention shall now be explained in more detail in the following description with reference to the figures. It is understood that the invention is not limited to this exemplary embodiment and that specific features can also expediently be combined and/or modified without departing from the scope of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0025]      FIG. 1  schematically shows a television receiver, 
           [0026]      FIG. 2  shows an electronic program guide including a content menu to be filtered 
           [0027]      FIG. 3  shows an electronic program guide including a filtered content menu 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0028]      FIG. 1  schematically depicts a television or multimedia receiver  1  connected to a display device  2 . The receiver  1  comprises a central unit  3  linked to a program memory  12 , and an interface  5  for communication with a high bit rate local digital bus  6  making it possible to transmit audio/video data in real time. This network is for example an IEEE 1394 network. The receiver  1  receives audio/video data from a broadcasting network through a reception antenna associated with a demodulator  4 . The receiver  1  furthermore comprises a remote control interface, here an infrared signal receiver  7 , for receiving the signals from a remote control  8 , a memory  9  for storing a database, and an audio/video decoding logic  10  for creating audiovisual signals to be sent to the display device  2 . 
         [0029]    The receiver  1  also comprises a circuit  11  for displaying data on the screen, often called the OSD circuit, the initials standing for “On Screen Display”. The OSD circuit  11  is a text and graphics generator which enables menus and pictograms (for example, a number corresponding to the station displayed) to be displayed on the screen of the display device  2  and which enables the navigation menus in accordance with the present invention to be displayed. The OSD circuit  11  is controlled by the Central Unit  3  and a navigator  12 ′ present in the program memory  12 . The navigator  12 ′ is advantageously made in the form of a program module recorded in a read only memory. It may also be embodied in the form of a custom circuit of ASIC type for example. 
         [0030]    Via the digital bus  6  and/or the broadcasting network the receiver  1  receives data comprising multimedia documents and descriptive data pertaining to these documents. These data originate either from a broadcasting network, or from the digital network  6 . The descriptive data comprise classification elements also called “attributes”, for the accessible multimedia documents. The descriptive data are for example contained in the service information specified in the DVB-SI Standard. These data are stored in the database of the memory  9  of the receiver  1  and are continuously updated. The navigator  12 ′ thereafter extracts the information from this database and processes it to produce the navigation menus displayed on the screen of the display device  2 . 
         [0031]      FIG. 2  shows an electronic program guide. Movies which are already broadcasted or broadcasted soon are presented and are categorized according to different genres (Action, Adventure, Comedy, Drama, Politics). In the same way, a video on demand library can be presented for downloadable content. It goes without saying that information regarding the movies, e.g. broadcasting times, actors and parental information may also be presented. In addition, a menu is shown for setting up filter values. A user might select between live content “Live” and video on demand content “VoD”. The selection is made using a gesture control. The device interprets the direction in which the user points with his hand or with a gesture control device. In  FIG. 2 , a movement in left or left-up direction is interpreted as selection of “Live”, a movement in right or right-up direction is interpreted as the selection of “VoD”. If a category is selected accordingly, the content is filtered and the filtered content is displayed. Thus, in  FIG. 2  all live content is displayed. Of course, the respective selection can also be made by the arrow keys of a traditional remote control. 
         [0032]    In a next step, the user selects a further filter, e.g. “Filter by Date”, “Filter by Genre”, “Filter by Keyword”. This is again done by gesture control or by a traditional remote control. In case of a gesture control, a movement in left direction selects “Filter by Date”, a movement in up direction selects “Filter by Genre” and a movement in right direction selects “Filter by Keyword”. If the filter by genre category is selected, the user selects the genre accordingly. In  FIG. 3 , a content menu is presented which has been filtered according to the filter values “Live”, “Filter by Genre” and “Comedy”. Thus, only live programs which relate to comedy are presented. 
         [0033]    Thus,  FIGS. 2 and 3  show that the setting of the application is outsourced to the main menu of the application. The concept which is proposed allows outsourcing all settings of all the functionality of an application in the main menu. By default, when the user requests the menu, it will open with the current application setting. From there, the user can parameter its functionality: for example the user is able to select active filters for the video catalogue. In  FIG. 3 , filters “Live”, “Filter by Genre” and “Comedy” are selected. The changes of the new settings, e.g. the new filter options and the new filtered content are immediately visible on the screen, as the filter menu and the presented content are visible at the same time on the screen menu. The selected filters are underlined in  FIG. 3 . Alternatively, marking of selected filters with a specific colour or bold is foreseen. 
         [0034]    In  FIGS. 2 and 3 , the gyroscopic remote control is given as an example because it only allows basic moves to navigate. However, for ergonomic purposes, the user interface portal is also usable using up-down-left-right keys (other ones should be used as shortcuts or advanced controls). A simple navigation is generally implemented in the main menu. Moving all controls (content filtering, search, definition of settings) in this menu simplifies the handling and takes advantage of the existing simple menu navigation. The invention is applicable to many systems, thus the receiver for audio/video content of  FIG. 1  is only an example. 
         [0035]    In other words, according to the invention, when the user requests to see the menu, then there is not a menu structure tree trough which the user has to navigate before he can actually see and access the items to be selected, but he sees immediately the current settings of the device, and can then navigate starting from the current point in the navigation tree. He does not have to start at the root of the navigation tree. When the user activates the menu, the menu displayed shows the ‘actual branch of a tree, together with the leaves’ in which the device is currently in—namely, the current settings. If the user wants to access another branch, he can do this by ‘climbing down’ and then ‘climbing up’ to another branch. In  FIG. 4 , the lowest part of the menu shows the entry “further settings” which leads to a lower part of the tree, from which other main branches may be reached. Such main branches are e.g. “display settings”. In  FIG. 5 , the “display settings” menu “video resolution”, “aspect ratio”, “brightness”, etc. are selectable. Other main branches are, e.g. “tuner settings”, “audio settings”, etc. The branch actually shown when menu access is requested is preferably the one last branch navigated to during the last use of the menu. Another possibility is to start at a defined ‘branch of highest interest’, preferably the one shown in  FIGS. 2-4 . 
         [0036]    In  FIG. 2-3 , three levels of branches (first level: Live, VoD; second level: Filter by Date, Filter by Genre, Filter by Key Word; third level: Drama, Comedy, Adventure, Politics, Action) and the leaves (Comedy 1 , Comedy 2 , Comedy 3 , Comedy 4  in  FIG. 3 ) are shown, however, also more or less branches might be shown at the same time. Nevertheless, it was found that showing three branches is most user friendly, in case a display device having an aspect ration of 4:3 or 16:9 as known in the art is used. 
         [0037]    When the user navigates downwards, the upper branches preferably move also upwards and are reduced in size. Advantageously, the user can ‘freeze’ a complete view, which means that the whole tree is displayed, as depicted in  FIG. 5 . The structure of a whole tree is depicted in  FIG. 6 . This tree is displayed in ‘freeze’ mode completely, as indicated in  FIG. 5 , even not all leaves and branches are given for clarity reasons. Thus, the user is able to see each and every possible selection he can make. Advantageously, in case the menu tree is too big to display every leave with a comfortable font size, a zoom function is available in ‘freeze’ mode to move up and down the menu tree and display a certain part of the tree in a bigger style, while still displaying the whole menu tree.