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(1) (MicroController Unit) A computer on a single chip. See microcontroller.

(2) (Multipoint Control Unit) A device that is used to moderate a videoconference of three or more end points, an end point being one or more users in a single location. In "continuous presence" mode, the most common method, the screen is split into one large and several smaller surrounding windows. The MCU sends the video of the dominant speaker to the large window. "Voice switch" mode has only one window, and the MCU switches the dominant speaker to that window. In "chair mode," a human moderator manually controls who is on screen at any given time. An MCU also provides an audio bridge that mixes the audio from all end points.

An MCU may include a built-in H.323 gatekeeper for translating user names into IP addresses, a video PBX for call switching, forwarding and transfer as well as video network management for quality of service (QoS), bandwidth management and accounting. See videoconferencing.

An MCU Plus
This Emblaze-VCON MCU provides a complete solution. Both H.323 and SIP compatible, it includes an H.323 gatekeeper, a video PBX, video network management and full streaming capabilities. It also comes with H.323 client software for desktop PCs. (Image courtesy of Emblaze-VCON, Inc.,
References in periodicals archive ?
A leading MCU design house in China, SinoMCU has been vigorously developing new products, while Hua Hong Semiconductor continues to upgrade its processes.
The first 'book' of the MCU will finish with a total of 22 films in 2019.
Delivering easy-to-use seamless connectivity is critical to the IoT evolution, said Emmanuel Sambuis, Vice President, MCU and Connectivity products at NXP.
Tohoku University and NEC have jointly developed a new MCU technology to significantly reduce the power consumption of a high-performance MCU.
Tamper type Old MCU (TS04) New MCU (TS09) Action Action Power switch 15-minute delay 15-minute delay.
It is now programmed via bootloader in the MCU which communicates with the PC via serial line.
An MCU interviewee indicated that Marines educate in a broad-based way to develop problem solvers.
System designers can achieve the lowest possible current dissipation by performing various kinds of processing only when necessary and then selecting the MCU operating mode most suitable for the specific function the system is performing at a given moment.
4 billion credit union will have extensive signage throughout the ballpark's interior and exterior, promotional nights with branded collectible giveaway items, and MCU information tables on the ballpark' s concourse level.
The coolant in the vest goes through the MCU to be cooled and if the garment is dry, it will put air in the system and will not cool as well.
Cheapest kit containing basically just the MCU itself--which cuts down the cost to about 5 EUR.