Abstract: A multi-channel Class D audio amplifier is provided to substantially reduce channel-to-channel crosstalk by employing in each channel a local triangle ramp generator controlled by a single global digital timing signal. The noise critical timing/integrating capacitor for the triangle ramp generator resides locally in each channel and adjacent to the PWM comparator of that channel and referenced to the local ground of that channel. The amplifier can also include a duty cycle limitation circuit to limit output power availability depending on the impedance of any attached loads (speakers).

Abstract: Presented is a video distribution system that includes a transmitter that receives an uncompressed source video signal and includes a compressor for compressing the uncompressed source video signal into a compressed video signal having a bandwidth lower than the bandwidth of the uncompressed source video signal, a reformatter configured for reformatting the compressed video signal to simulate an uncompressed video signal having a bandwidth lower than the bandwidth of the uncompressed video signal. The video distribution system also includes a receiver that receives the compressed video signal that simulates an uncompressed video signal and includes a decompressor configured for decompressing the compressed video signal that simulates an uncompressed video signal into a decompressed video signal, and output port configured for transmitting the decompressed video signal to a display.

Abstract: A mechanism for storing a length of cord that includes a first and second pair of pulleys mounted at opposite ends of a frame. An intermediate section of a cord is stored in the frame and has one end of the stored section fixed to the frame, with the other end extending from the frame. The stored cord section is at least partially wound over the pair of pulleys, and one pair of pulleys is slidably mounted for motion toward the other pair of pulleys. A damper is coupled to one of the second pair of pulleys, which engages the pulley to rotate about an axis to dampen the rotary motion of one of the second pair of pulleys in such a manner that the intermediate storage section is in tension during retraction and withdrawal.

Abstract: A device and method for simultaneously capturing a content video stream comprising video of content presented during a live presentation, a content audio stream comprising audio accompanying the presented content, a presenter video stream comprising video of the presenter recorded via a video camera, and a presenter audio stream comprising audio of the presenter recorded via a microphone. The content audio stream and the presenter audio stream are mixed into a combined content and presenter audio stream, the content video stream is combined with the presenter video stream into a combined content and presenter video stream, and the combined content and presenter audio stream and the combined content and presenter video stream are encoded into a combined AV data stream. The combined AV data stream is distributed via one or more output channels, for example to a digital sink via an HDMI connection.

Abstract: An audiovisual (AV) distribution network communicates via Internet Protocol and is implemented as a framework of local area networks (LANs). Transmitters and receivers in the AV distribution network leverage multicast transmission technology and pre-authentication to switch quickly and seamlessly between sources transmitting audiovisual data protected by a security protocol scheme.

Abstract: When switching sources, resolutions or refresh rates in a video distribution network, switching times are reduced by maintaining video lock and security authentication between a video switcher and a video sink. The scaler maintains video lock and security authentication by continuing to generate video timing data during switching events. The scaler also facilitates an aesthetically pleasing transition by generating image content data prior to and after the switching event.

Abstract: A system in which a portable electronic device communicates with a keypad including a near field communication (NFC) tag in order to establish remote control of a controllable residential device over a home automation network. Upon placing the portable electronic device near the keypad, a control application running on the portable electronic device is launched and a graphical representation of the keypad is displayed on the portable electronic device. The portable electronic device then provides remote control of the controllable residential device over the home automation network. The portable electronic device may additionally provide expanded control options for the controllable residential device.

Abstract: Systems, methods, and modes are disclosed for live presentation sharing between meeting presenter's and meeting attendees' portable electronic devices during a meeting, and more specifically for viewing presentation content on a portable electronic device displayed on a meeting room display during a meeting. The system comprises a presentation gateway configured for receiving and transmitting presentation content to a meeting room display during a meeting. The system further comprises a portable electronic device that pairs with the presentation gateway.

Abstract: Systems, methods, and modes are disclosed for sharing presentation content displayed on a meeting room display during a meeting. The system comprises one or more presentation gateways each associated with a network address and configured for receiving and transmitting presentation content to a meeting room display during a meeting. The system further comprises one or more RF beacons each associated with a presentation gateway and configured for broadcasting information.

Abstract: A touch screen device includes an electric power receptacle configured for being spill resistant. The electric power receptacle provides a fluidly isolated environment for each contact thereby allowing the electric power receptacle to pass a dielectric withstand test.

Abstract: Presented is a wall-mounted control system for a portable touch screen device. The control system includes a housing, a touch screen mounting member moveably coupled to the housing and configured to releasably hold the portable touch screen device, a processor configured for providing an interface between the portable touch screen device and one or more remote systems, a docking connector configured for electrically mating with the portable touch screen device and establishing electrical communication between the processor and the portable touch screen device, and a communication circuitry configured for establishing communication between the processor the one or more remote systems.

Abstract: Devices, systems, software, and methods for control of light emitting diodes (LEDs) via an LED driver circuit that receives a dimmed AC input signal from a dimmer and generates an output signal to power and dim an LED element. The LED driver circuit comprises a dimmed input sense circuit, a microcontroller, and a power supply circuit. The power supply circuit generates a power supply from the dimmed AC input signal for powering the LED driver circuit. The dimmed input sense circuit detects an incoming duty cycle Din of the dimmed AC input signal. The microcontroller stores one or more dimming level parameters, receives the detected incoming duty cycle Din from the dimmed input sense circuit, and generates an output duty cycle Dout based on the detected incoming duty cycle Din and the one or more dimming level parameters. The LED driver circuit generates the output signal using the generated output duty cycle Dout for powering the LED element at a generated dimming level.

Abstract: System and method for scheduling a meeting room includes accepting information defining a meeting type, which is associated with at least one preset resources. The method further includes displaying at least one preset parameter based on the meeting type including email address of attendees, receiving preset information from the at least one displayed preset parameter, automatically identifying and reserving a first room that is associated with a maximum capacity number by communicating with a scheduling server the availability of the at least one preset resources based on the received preset information, notifying the organizer of the first room, detecting a number of attendees physically presence in the first room during an attendance time period by utilizing at least one sensor, and sending at least one command to control at least one of the associated preset resources in response to a start time and end time.

Abstract: Systems, methods, and modes are disclosed for initiating a conference call on a conferencing endpoint from a portable electronic device. The system comprises a conferencing endpoint associated with a network address and configured for receiving conferencing information and using said conferencing information to dial a conference call. The system also comprises a portable electronic device comprising a network interface configured for enabling communication between the portable electronic device and the conferencing endpoint. The portable electronic device pairs with the conferencing endpoint using the conferencing endpoint network address.

Abstract: A device and method for simultaneously capturing a combination of content video, content audio, presenter video and presenter audio, as well as distributing a combination of content video, content audio, presenter video and presenter audio to a digital sink via an HDMI connection.

Abstract: A master transmitter distributes a plurality of audio channels to one or more expansion receivers as a multiplexed audio stream. Control information is also transmitted between the master transmitter and the expansion receivers. Both the control information and the multiplexed audio stream are transmitted on the same cable allowing for reduced clutter and cheaper material and installation costs.

Abstract: A system and method for modeling a lighting control system for an enterprise is provided comprising an application (App) on a mobile device, or laptop, or personal computer, or other like device, that can communicate electronically with a webpage accessible by the internet or local area network or wide area network, wherein the webpage represents a program, and the program provides for the receiving, storing, and processing of lighting control system specified information on a space-by-space basis, and further wherein a unique part number for the space-based lighting control system can be generated for the particular space, such that delivery of individual, but substantially integrated space-based lighting control systems, can be delivered to the spaces for installation in the enterprise location.

Abstract: A cable management hub for use in providing an interface between one or more pieces of audio-visual presentation equipment and a laptop. The cable management hub comprises a first portion that includes one or more cables that mate with respective cables from the laptop. The cable management hub further includes one or more buttons, each of which is configured to generate an electrical signal when pressed by a user that indicates a desire by the user to transfer control of the audio-visual presentation equipment from a previous user, if one exists, to the user that pressed the button. If no one had control, then the user that presses the button would gain control of the audio-visual equipment. The cable management hub further includes one or more illuminated indicators configured to illuminate in a manner indicative of a received status condition signal.

Abstract: A cable retractor for releasing and retracting an application cable. a cable retractor comprises a base; a spool having sides, the spool rotatably secured to the base to permit the application cable to be wrapped around the spool; a mandrel disposed concentrically within the spool, the mandrel being rotationally secured to the base to prevent axial rotation of the mandrel relative to the base; and the mandrel further having a recessed groove running lengthwise, and an internal cable having an outer connector and inner connector, the outer connector being connected through the spool to one end of the application cable, and the inner connector being exposed at one end of the mandrel from within the recessed groove.