Television Stereophonic System

A stereophonic system for television sound having some unique characteristics is described. The L + R information is transmitted as ordinary low frequency signals while the L - R information is transmitted by frequency division multiplex by a method that may be characterized by the absence of a pilot carrier or residual subcarrier in the transmission of the signal and by there being no requirement to regenerate a subcarrier at the receiver to detect the L - R information. Full advantage may be taken of the interleaving of L + R and L - R information so that + 25 KG FM deviation may be allocated to each, yet the total system FM deviation does not exceed ± 25 KC.