Importance

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Abstract

A system for controlling diverse infrared controlled devices, capable of emulating infrared signals provided by diverse infrared remote controls by recording them, and then using information derived from the recorded signals to reproduce the signals. A received infrared signal is sampled, stored, edge trimmed and compressed into a table of entries. Each entry indicates a level and a length of a portion of the associated infrared signal having that level. The compression also eliminates transients from the captured infrared signal. The table fully describes the captured infrared signal. A table header may contain the frequency at which the captured infrared signal was sampled, and the number of table entries used to describe the signal. During playback, a file containing the table for a user selected infrared signal may be opened and read into a dynamic memory. The vector table header information may be used to determine the number of stored vector table entries, and to determine the sampling rate at which the associated infrared signal was captured. An infrared shift register in specialized hardware shifts out one bit of data every sampling cycle until each bit of data described by each entry in the vector table has been transmitted. The disclosed system may be conveniently embodied to be voice controlled, to enable voice control over all infrared remote controlled devices in a disabled user's living environment.

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First Claim