In electronics, a multiplexer or mux (occasionally the terms muldex or muldem are also found for a combination multiplexer-demultiplexer) is a device that performs the multiplexing, it selects one of many analog or digital input signals and forwards the selected input into a single line. A multiplexer of the 2n inputs has n select lines, which are used to select which input line to send to the output.

An electronic multiplexer makes it possible for several signals to share one device or the resource, for example one A/D converter or one communication line, instead of having one device per input signal.

On the other end, a demultiplexer (or demux) is a device taking a single input signal and selecting one of many data-output-lines, which is connected to the single input. A multiplexer is often used with a complementary demultiplexer on the receiving type end.

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It looks like Motorola might be looking to expand distribution of its multi-room “Home Media DVR.” The system records TV programs on on central PVR, but allows playback throughout the house. This is the setup employed by Verizon in its FiOS multi-room PVR system. Thursday Motorola invited journalists to check out the box. Motorola execs also said that you could program the PVR using a mobile phone. They mentioned the Motorola RAZR and Q as examples, but I wouldn’t be surprised if you could make this function work with non-Motorola smartphones.So far no plans have been announced to roll the boxes out to anyone besides Verizion FiOS customers, but I can’t help but get the feeling that Motorola wouldn’t be showing the box off 2 months after it was first deployed unless the company has something up its sleeve.via Davis Freeberg .

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