Abstract:
A system for controlling display and operation of simultaneous transmissions of at least two media includes an entertainment unit capable of transmitting at least two media simultaneously. A wireless interface device is used to select a first and second media from the at least two media. A display device in electrical communication with the entertainment unit receives and displays a video portion associated with each of the first and second selected media. At least two wireless receivers are provided for receiving an audio portion associated with each of the first and second media. The wireless interface device is further provided for independently controlling operation of each of the first and second media.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to multimedia entertainment systems in a vehicle and, more particularly, to an apparatus capable of controlling display and operation of at least two media programs transmitted simultaneously by the multimedia entertainment system.  
       BACKGROUND OF THE INVENTION  
       [0002]     Multi-media systems have been recently made available in which multiple media programs, such as video and radio, can run simultaneously so that a user can watch a video while at the same time listen to a radio program or so that one user can watch a video while another user can watch a different video or listen to a radio program. Such systems are typically available on an airplane or in a home environment.  
         [0003]     In an airplane environment, a passenger is limited in his/her media program selection to only those being offered in the airplane, which typically includes one preselected movie and one or two preselected audio, or radio, programs. The passenger listens to his/her selection by tuning to the appropriate channel associated with his/her media selector. There is no ability to select a program not already preselected or to control the operation of the selected program, other than the volume.  
         [0004]     In a home environment, a user is only limited in his/her media program selection to his/her collection. In this instance a user is able to select any one of several media programs and can control each of them to his/her liking. However, each media program is typically controlled via a separate controller or manually. There is no common display for all the media programs available for selection.  
         [0005]     In an automobile environment, due to limited space it has generally been the case that only one particular type of media can be played at a given time in a given vehicle. For example, only one movie may be played at a given time in a given vehicle, and such playback is to the exclusion of any other media sources such as, e.g., the radio. This is true for a variety of reasons. One such reason is that the movie playing device, e.g., DVD player, is typically coupled to the existing speaker system of the vehicle, thus allowing only one media source to be played back through the speakers at any given time. Another such reason is that it is difficult for a person to follow the play back of a particular audio media source when another audio media source is simultaneously being played back.  
         [0006]     Accordingly, there is a need for a multimedia entertainment unit for a vehicle that allows for a plurality of passengers to each watch and/or listen to a different media while allowing independent control of each of the selected media.  
       SUMMARY OF THE INVENTION  
       [0007]     A system for controlling display and operation of simultaneous transmissions of at least two media includes an entertainment unit capable of transmitting at least two media simultaneously. A wireless interface device is used to select a first and second media from the at least two media. A display device in electrical communication with the entertainment unit receives and displays a video portion associated with each of the first and second selected media. At least two wireless receivers are provided for receiving and broadcasting an audio portion associated with each of the first and second media. The wireless interface device is further provided for independently controlling operation of each of the first and second media.  
         [0008]     Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0009]     The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:  
         [0010]      FIG. 1  is a representation, in block diagram form, of a preferred embodiment of a system according to the present invention; and  
         [0011]      FIG. 2  is a representation of a display according to the present invention in which simultaneous media are displayed; and  
         [0012]      FIG. 3  is a representation of a display according to the present invention illustrating the selection of a second media source; and  
         [0013]      FIG. 4  is a representation of a display according to the present invention illustration the simultaneous display of a video media and an audio media. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0014]     The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.  
         [0015]      FIG. 1  is a block diagram illustrating the system  10  of the present invention. The system  10  includes an entertainment unit  12  installed in a vehicle and includes circuitry and software to process signals and transmit audio and/or video signals associated with any one of multiple media, such as a digital video disk (DVD) player  14 , a compact disk (CD) player  16 , an amplitude modulation/frequency modulation/satellite (AM/FM/SAT) radio  18 , and a hard disk drive (HD)  20 . It is to be appreciated that the media devices described above are merely illustrative and, thus, other media devices may also be employed in accordance with the invention, while maintaining the spirit and scope thereof.  
         [0016]     An antenna  22  may be located within the entertainment unit  12  or may more likely be located external thereto as shown in  FIG. 1 . For example, antenna  22  may be the original antenna included in the vehicle, which is typically used to receive frequencies associated with AM/FM radio stations. Such an antenna is typically located in the windshield or protruding from the exterior of the vehicle. Moreover, antenna  22  may be a special purpose antenna, capable of receiving frequencies corresponding to, for example, satellite communications from a satellite  24 . The satellite communications may include movies and other media types (e.g., music). In any event, the antenna  22  is coupled to the AM/FM/SAT radio  18  of the entertainment unit  12 . If satellite or other communication is desired, the antenna would likely be coupled to a signal processor  26  which would perform functions such as demodulating, signal discrimination, and signal splitting.  
         [0017]     Coupled to the entertainment unit  12  is a display device  28  having a first screen portion  30  and a second screen portion  32 . The video signal associated with DVD player  14  and/or audio signal associated with CD player  16 , AM/FM/SAT radio  18  and HD  20  are displayed on first and second screen portions  30 ,  32 , as described in greater detail below.  
         [0018]     The display device  28  further includes a first wireless transceiver  34  and a second wireless transceiver  36 . The transceivers  34 ,  36  transmit the audio associated with the selected media to a first wireless headset  38  and a second wireless headset  40 . It is to be appreciated that while the illustrative embodiment of  FIG. 1  is shown with the transceivers  34 ,  36  housed in the display device  28 , the invention is not so limited, and the transceivers  34 ,  36  could be housed in the entertainment unit  12 . It is also to be appreciated that while the illustrative embodiment of  FIG. 1  is shown with two wireless headsets, i.e.,  38 ,  40 , the invention again is not so limited and, thus, any number of wireless headsets may be used in conjunction with the invention.  
         [0019]     The audio associated with the selected media is transmitted to the headsets  38 ,  40  via first and second wireless signals. The wireless signals can be any type of wireless signal including, but not limited to, radio frequency and infrared signals.  
         [0020]     In operation, the audio portion of the first selected media is transmitted wirelessly at a first frequency for receipt by the headsets  38 ,  40 . The audio portion of the second selected media is transmitted wirelessly at a second frequency for receipt by the headsets  38 ,  40 . If the DVD Player  14 , or any other media having video associated therewith, is selected, the video portion is sent to the display  28 . The user of the headsets  38 ,  40  chooses which audio program to listen to via selector switch  42  associated with each headset  38 ,  40 . Thus, if the user switches to the first frequency, or channel A, then the user has just tuned to the audio portion being transmitted by first transceiver  34 . If the user switches to the second frequency, or channel B, then the user has just tuned to the audio portion being transmitted by second transceiver  36 . Each of the headsets  38 ,  40 , however, could be tuned to the same frequency or channel, if desired.  
         [0021]     Media selection and control is done via a wireless interface device  44 , or handheld remote control device. By using the remote control device  44 , a user selects which media is to be transmitted via first and second transceivers  34 ,  36 . A user would select “A” on the remote control device  44 , and then select which media should be transmitted wirelessly on channel A. Once selected, the audio portion of the first selected media is wirelessly transmitted over channel A for receipt by either headset  38 ,  40  that is tuned to channel A. Corresponding control or data information associated with the first selected media is displayed on first screen portion  30 , as shown in  FIGS. 2-3 . Furthermore, remote control device  44  is also used for controlling operation of the selected media, such as volume, radio channel, track number, etc.  
         [0022]     When channel B is selected via the remote control device  44 , the second media can then be selected and/or controlled. The media is transmitted via second transceiver  36  and the corresponding audio portion is wirelessly transmitted on channel B for receipt by either headset  38 ,  40 . The second media selection is displayed on the second screen portion  32  of the display  28 , as shown in  FIG. 2 . Once a second media is selected, a user can switch between the two selected media via selector switch  42  on his/her headset  38 ,  40 , or change one of the selections by selecting a different media.  
         [0023]      FIG. 3  illustrates the type of information that can be displayed on the second screen portion  32  when selecting the second media, i.e., the available modes or media. After the two media are selected, the type of information displayed on each of the screen portions  30 ,  32  include channel number, mode (i.e., AM/FM, Satellite, CD, DVD, HD, etc.), headset status (i.e., muted or unmated), radio/satellite station information, radio/satellite station, preset number, disc type, disc track/chapter, disc elapsed time, disc/satellite song title, artist and/or album.  
         [0024]     If a movie is one of the media selected, the video portion is displayed across the entire display  28 , rather than being split onto one of the first and second screen portions  30 ,  32 . Information associated with the second selected media is then displayed as an overlay at the bottom, as shown in  FIG. 4 , or at the top of the screen  28 .  
         [0025]     In the preferred embodiment, each screen portion  30 ,  32  displays information on the perimeter below the split screen channel layout, such as time, parental control status (i.e., locked or unlocked), error messages, and status of discs within a radio 6-disc changer.  
         [0026]     Thus, the invention allows a plurality of passengers in the vehicle to watch and/or listen to a different media program. The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention. For example, it is to be understood that some of the elements shown in  FIG. 1  may be included in the entertainment unit  12  or they may be separate from the entertainment unit  12  but nonetheless intended to interact with the entertainment unit  12 .