Abstract:
The Graphical User Interface (GUI) of a videoconference terminal is provided with user-selectable icons which are associated by the user with various video signals. Textual labels for the various video signals may also be provided. This information may be exchanged with the “far end” participant in the video conference. During the videoconference participants may then simply select an icon to dynamically switch video feeds without having to remember by number the particular camera or other video signal associated with a desired video feed.

Description:
BACKGROUND  
       [0001]     1. Field of the Invention  
         [0002]     This invention relates to videoconferencing systems. More particularly it relates to Graphical User Interfaces used to control the operation of a video conference terminal.  
         [0003]     2. Description of the Related Art  
         [0004]     Videoconferencing systems are relatively complex. They typically involve a plurality of video signals, audio signals, processors, apparatus and/or software for data compression and decompression, directional microphones, speakers, video display units, feedback-prevention circuits, cameras and connections to telecommunications networks with associated interface devices.  
         [0005]     Systems and methods which alleviate the complexity of videoconferencing systems and simplify the user interface help to gain mass-market acceptance of videoconferencing as an alternative to in-person meetings which often involve travel to a remote location. As has been demonstrated in the personal computer industry, one particularly successful method of simplifying the user&#39;s interaction with the system is to employ a graphical user interface (GUI). Since videoconferencing systems are often processor-based systems having one or more video displays, a GUI is particularly suitable due to the fact that the major hardware components of a GUI are already in place.  
         [0006]     Videoconferencing systems often have more than one camera or source of video signal associated with a videoconferencing terminal or station. The user may select the particular video signal to be displayed on his or her video monitor(s). In addition, the user may also be presented the option of controlling either the “near end” or “far end” video source—e.g., the pan and tilt of a camera generating video signals being sent by or to the user&#39;s terminal. Keeping track of which video signal is which is a task that increases the user&#39;s workload during a videoconference and detracts from the user&#39;s attention. The present invention simplifies the task of video source selection.  
       SUMMARY OF THE INVENTION  
       [0007]     Various icons are selected by the user for display on the Graphical User Interface (GUI) of a videoconference terminal which icons represent different sources of video signal. The icons may be labeled with a textual label and may also be sent to the “far end” participant in the videoconference. By selecting a certain icon, the video source associated with that icon is automatically used as the video feed to the user&#39;s monitor. Icons may be selected from a catalog of previously-created icons which may be categorized by, for example, profession and/or industry segment. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]      FIG. 1  is a block diagram of an exemplary video conference station for use in a videoconferencing system.  
         [0009]      FIG. 2  is the camera settings page of a graphical user interface for a videoconferencing system.  
         [0010]      FIG. 3  is an icon selection page containing medical-related icons.  
         [0011]      FIG. 4  is an icon selection page containing manufacturing-related icons.  
         [0012]      FIG. 5  is an icon selection page containing education-related icons.  
         [0013]      FIG. 6  is an icon selection page containing legal-related icons.  
         [0014]      FIG. 7  is an icon selection page containing corporate or business-related icons.  
         [0015]      FIG. 8  is an example of a screen seen by the user during a videoconference and showing three, video-source selection icons. 
     
    
     DETAILED DESCRIPTION  
       [0016]      FIG. 1  is a block diagram of an exemplary video conference station  100 . For simplicity, the video conference station  100  will be described as the local video conference station, although the remote video conference station may contain a similar configuration. In one embodiment, the video conference station  100  includes a display device  102 , a CPU  104 , a memory  106 , at least one video capture device  108 , an image processing engine  110 , and a communication interface  112 . Alternatively, other devices may be provided in the video conference station  100 , or not all above-named devices provided. The at least one video capture device  108  may be implemented as a charge couple device (CCD) camera, a complementary metal oxide semiconductor (CMOS) camera, or any other type of image capture device. The at least one video capture device  108  captures images of a user, conference room, or other scenes, and sends the images to the image processing engine  110 . Typically, the image processing engine  110  processes the video image into data packets before the communication interface  112  transmits the data packets to the remote video conference station. Conversely, the image processing engine  110  also transforms received data packets from the remote video conference station into a video signal for display on the display device  102 .  
         [0017]     Referring now to  FIG. 2 , there is shown the Camera Settings page for one particular embodiment of the invention. Screen identifier  2  informs the user of the purpose or function of the currently-displayed screen. The current video feed may be displayed in window  4 . Navigation buttons  6  allow the user to move forward or backwards through the menu hierarchy. Selection may be made by any of the means known in the art—for example, pointing devices such as a mouse or trackball, keyboard cursor controls (“arrow keys”) light pen, touch screen or handheld remote control.  
         [0018]     System tab  8  may be used to access various administrative functions which, in certain embodiments, may be password-limited. Page identifier  10  informs the user that both previous and subsequent pages within the “Camera Settings” chapter are available via navigation buttons  6 . For example, one page might contain general settings such as the brightness level of the far side video source while another page might contain a selection of high-resolution and motion-optimized cameras.  
         [0019]     In the particular embodiment illustrated, there are three cameras or video signals which the user may alternatively select for either broadcast by the near end terminal or selection by the far end user. Associated with each camera or video feed is camera name field  12  which may be populated within character limits set by the system by alphanumeric characters entered from a keyboard, handheld remote, or similar device. Also associated with each camera or video feed is an icon  14 .  
         [0020]     In one particular embodiment, when the user selects any one icon  14  on the Camera Settings page illustrated in  FIG. 2 , a different Camera Settings page such as that illustrated in  FIGS. 2 through 6 , inclusive, is displayed. On these pages, a selection of icons may be displayed for the user&#39;s selection. Icons may be grouped by interest areas which may be listed on drop down menu  16 . Selection of a certain interest area may cause the display to switch to an appropriate group of selectable icons.  
         [0021]     By way of example,  FIG. 3  shows various icons that might be useful in a videoconference relating to a medical issue. Doctor icon  21  might be associated with a camera trained on the physician; patient icon  22  might provide an image of the patient who is the subject of the videoconference; X-ray icon  23  could be associated with an X-ray viewer; and, stethoscope icon  24  could be used to designate a video feed from a cardiac monitor or other medical instrument.  
         [0022]     Another example is shown in  FIG. 4  where icons which might be relevant to a videoconference concerning a manufacturing process are shown. Icon  31  could be used to label a video feed from a DVD player; icon  32  could be used to label a video feed from a VCR; whiteboard icon  33  could be used for a camera trained on a whiteboard, or a video feed directly from a video-enabled, electronic whiteboard; factory icon  34  could be associated with a camera within a manufacturing facility; and, circuit board icon  35  could be associated with a camera focused on a particular product within a manufacturing facility.  
         [0023]     In yet another example, a group of icons suitable for a videoconference involving an educational institution is shown in  FIG. 5 . Icon  44  might represent the video feed to a Computer-Based Training (CBT) terminal; student icon  45  might be associated with a camera directed to a student; teacher icon  46  could similarly be directed on the lecturer.  
         [0024]      FIG. 6  shows a selection of icons that might be suitable for a videoconference of a legal proceeding. Icon  54  could be for a camera trained on the judge while icon  55  was for a camera trained on the attorney examining the witness. Scales-of-justice icon  56  might be associated with yet another location within a courtroom.  
         [0025]     Illustrated in  FIG. 7  are a group of icons suitable for a generic videoconference in a corporate setting. Icon  64  might be associated with a document camera or an overhead projector; icon  65  could be the video feed from a portable video camera; and, icon  66  might be the video from the set-top box in the conference room.  
         [0026]     In the embodiment illustrated in  FIGS. 2 through 6 , selecting the “back” navigation button  6  returns the user to the Camera Settings page illustrated in  FIG. 2  where the process of labeling and associating icons with various cameras and/or video feeds may be continued.  
         [0027]     Once the various camera or video feeds have been labeled and assigned an icon, the icons may be exchanged with the far end terminal. In this way, each participant in the videoconference has knowledge of the various video signals he or she may select for display on the local video display device.  
         [0028]     Default camera or video signal names may, in some embodiments, be initially displayed on the camera settings page. By way of example only, the default names might be: “Main”; “Document”; “VCR”; and, “Aux”. In a similar fashion, default icons may be associated with these default names such as base unit camera icon  66 , document camera icon  64  and VCR icon  32 .  
         [0029]     In certain embodiments, labels displayed on the screen (including the names of the various icon categories), may be automatically translated into the language selected by the user. In still other embodiments, language selection may be inferred from the particular country code used in dialing the videoconference.  
         [0030]     A representative example of a video display is shown in  FIG. 8  where icon  71  is used to indicate whether the pan and tilt controls on the remote control will move the camera connected to the videoconference station on the near end or far end of the videoconference. When icon  71  is a camera pointing towards the user, the pan and tilt controls may be used to aim the camera on the near end unit; when icon  71  shifts to a depiction of a camera pointing away from the user, the pan and tilt controls affect the moveable camera on the far end station of the videoconference. Near/far video text label  72  may also be used for this function.  
         [0031]     Also shown in  FIG. 8  are camera selection icons  73 . In the illustrated example, camera  1  is selected (as indicated by the highlighted icon) and the previously associated camera name is displayed in text box  74  which is joined by label connector  75  to (in this case) the “doctor” icon. In certain embodiments, the camera icons and/or video feed labels  72  may automatically be removed from the screen after a pre-selected interval. The time interval may be one of the administrative functions under the “system” tab  8 . In some embodiments, video feed label  72  may only be displayed together with label connector  75  when the user&#39;s pointing device “rolls over” the particular icon. Alternatively, video feed label  72  and label connector  75  may be displayed by a first instance of user selection while the icon is selected by a second instance of user selection—for example, positioning a cursor on the icon and “clicking” on it would cause the display of video feed label  72  and clicking on the icon a second time would cause the video display to switch to the video feed associated with the icon.  
         [0032]     In certain embodiments, the camera selection icons are not shown on the user&#39;s display unless and until the user requests them. The request may be made, for example, by pressing the “camera select” button on a wireless remote control. Similarly, the remote control may be equipped with a rocker-type switch to select either “near” or “far” end video signals for display. Alternatively, a single button could be used to toggle between near and far end video feeds with the user relying on near/far camera icon  71  to determine which is currently displayed.  
         [0033]     While the present invention has been described with respect to a limited number of embodiments, those skilled in the art will appreciate numerous modifications and variations therefrom. It is intended that the appended claims cover all such modifications and variations as fall within the true spirit and scope of this present invention.