Infrared remote controls work well enough to have stuck around for 25 years, but they do have some limitations related to the nature of infrared light. The "stop" command tells the microprocessor it can stop increasing the volume. It then passes this signal to the microprocessor, which goes about increasing the volume. When the infrared receiver on the TV picks up the signal from the remote and verifies from the address code that it's supposed to carry out this command, it converts the light pulses back into the electrical signal for 001 0010. So when you press the "volume up" button on a Sony TV remote, it sends out a series of pulses that looks something like this: a "stop" command (triggered when you release the "volume up" button).the device address (so the TV knows the data is intended for it).
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