Hewlett-Packard Development Company, L.P. (Houston, TX)

In meetings, conferences, lectures, and other settings that involve interaction, media slides are used often. With the advent of handheld and laptop computers, speakers can give a presentation straight via their laptops through an interface to the projector during the conference. Connecting and disconnecting each presenter’s laptop to the projection apparatus, however, can be an awkward and unsettling process especially since presenters are seated at various locations around the room. The wireless interface allows media sequences from multiple media sources to be projected in a common display via the wireless interface as well as the presentation server. Presenters need not run or switch cables or other physical connections to switch media sources to the common display. It does not require any software changes to the laptops that host media sources. The interface provides an independent security between the media source and server. The presentation server is able to communicate over the mouse port with media sources, allowing for new user interfaces, such as gesture recognition that can be utilized to control the presentation. Multiple projectors in a row illuminate the surface of the screen, while eliminating shadows as well as other display artifacts when presenters walk between the projector and the screen. The screen automatically mutes any projector light that is directed at the presenters.

To present data, like graphics or text at conferences, meetings or lectures in other venues that require interaction, it is necessary to be able to use a common medium like a screen for a projector. Slide shows, sometimes known as “slide shows” were commonly used in the traditional presentation. These are optical transparencies which are projected onto a screen using the projector. The advancements in computing technology have enabled software applications for developing media slidesand projectors that are able to accept the videooutput signal from laptops or computers and projecting directly onto the medium. The increasing use of handheld computers and laptops lets a presenter create a presentation using a laptop for instance, and then deliver the presentation using the laptop and connect directly to the projector on the venue of the conference.

Most often, a conference or meeting has several presenters, each with laptops and presentations. It may be challenging and disruptive physically join and unplug each presenter’s laptop from their projectors, particularly when they’re seated in different locations around the space. Further, physically moving the projector around the room can have adverse effects on the presentation because of presenter movements as well as uneven lighting and projection angles. The consolidation of multiple presentations onto one machine is a requirement for advanced coordination between presenters, and compatibility with different formats for presentations, and raises security concerns due to the necessity to connect the various devices.

A system and method of integrating and co-ordinating media presentations from multiple presenters over wireless links. This includes a plurality media sources such as laptops, handhelds or desktop computers each equipped with (i) an audio or video sequence, for example an aslide-based presentation of frames and (ii) the VGA output to transmit that media sequence. Each presentation controller is connected to each source’s VGA output. It is able to be used for wireless communication. The central server is operable to communicate wirelessly with each of the presentation controllers, allowing for the reception of every media sequence and for arbitrating among the various media sequences. One or moreprojectors connect to the server to coordinate and displaying the media sequences onto the common display or projection screen.

Each media source transmits the presentation data, which comprises each media sequence, through the presentation controller of its choice to the host of the presentation via the wireless connection. Each presentation controller has an ad-hoc display sequencer which detects changes in the current frame. If the display sequencer determines that there has been a change in the frame an additional frame or a portion of it is sent to the server for presentation via the wireless link. The presentation controller transmits only the changes to the frame in question to the presentation server and does not need to maintain the bandwidth necessary for a live video stream. The wireless link could operate in accordance with a specific protocol such asIEEE 802.15 or other protocols.

The presentation server organizes the media sequences from each media source onto a common display. Operator controllers are able to receive signals from the operator console via a graphical user interface (GUI), and control the arbitrage. It is possible to switch between media sequences in a sequence or interleave them with frames from different sequences or tile the media in an interactive display that responds to the GUI.

A plurality or projectors are used proximate the common display. Each projector is able to receive the current media sequence frame from the presentation server. The display’s brightness from each projector iscalibrated such that an aggregate displayed image on the display is an even brightness. The brightness of each projector is recalculated whenever the presenter interrupts any of the display paths. This creates an obscured display image. Cameras capture the look of the image being displayed and gives feedback to the presentation server to determine the area that is obscured and adjust the brightness on an individual pixel level to decrease or eliminate the area that is obscured.

Each projector is located in a specific place. This means that each one has a different angle or distance perspective to the common display. The presentation server computes display parameters, like angles and distances, for each projector corresponding to the display appearance on the common display. The presentation server calculates the display parameters for all projectors so that the total, overlapping image on the commondisplay appears consistent. This way, the frames are displayed according to the parameters for the display and are recomputed, according to the appearance of the media sequence on the common display, whenever a projector, or the common display is moved. The presentation server makes the desired media sequence and the image displayed in a consistent manner, as are the results.

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