Patent ID: 8180066
Filing Date: 2012-05-15
Classification: H04B,H04L

Abstract:
1. A method of transmitting audio signals, the method comprising: modulating a frequency of n carrier signals to produce frequency modulated signals, wherein n is an even number that is greater than or equal to 2 and wherein each of the n carrier signals has a different frequency and includes an audio signal; mixing the frequency modulated signals to produce a composite frequency modulated signal; converting the composite frequency modulated signal into a low voltage signal; coupling a feed voltage with the low voltage signal to produce a coupled signal; transmitting the coupled signal through a single line of a transmission cable to produce a transmitted signal; extracting the feed voltage and the low voltage signal from the transmitted signal; generating a prepared low voltage signal based on the low voltage signal; and routing the prepared low voltage signal to infrared emitters of an audio signal infrared transmitter unit.