Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1987-12-09
1989-08-08
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
34082557, 34082569, 3581941, 455603, G08C 1900
Patent
active
048560812
ABSTRACT:
A reconfigurable remote control apparatus and method for capturing the signals of transmission devices of at least two different protocols are provided. Because transmission devices either output signal bursts of different lengths at a carrier frequency followed by pauses of different lengths, or pulses of a relatively constant length followed by pauses of different lengths, a first determination is made as to the type of system being captured. After the system type is determined, the carrier frequency and the burst and pause lengths are determined for a burst type system, while only the pause lengths are determined for a pulse-pause type system. The captured information is preferably compressed according to a preferred compression scheme which finds and stores all possible signal lengths and all permitted adjacent signal length combinations for a particular apparatus, and composes and stores a compressed code which acts as a pointer to the stored signal length combinations. A further aspect of the invention is that a user need only press the keys of the remote unit to be captured during the capturing sequence and is prompted to do so by the apparatus of the invention.
REFERENCES:
patent: 4566034 (1986-01-01), Harger et al.
patent: 4623887 (1986-11-01), Welles, II
patent: 4626848 (1986-12-01), Ehlers
patent: 4712105 (1987-12-01), Kohler
patent: 4746919 (1988-05-01), Reitmeier
patent: 4771283 (1988-09-01), Imoto
Griffin Robert L.
Kuntz Curtis
North American Philips Consumer Electronics Corp.
Rich Marianne R.
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