Patent ID: 7577407

Claim:
A method of re-transmitting data transmitted over an FM subcarrier, comprising the steps of: receiving at a localcast transmitter the transmitted data; locally formatting the transmitted data for local-area wireless transmission; wherein locally formatting the transmitted data includes encoding the transmitted data at a data encoder when retransmitting using a first transmission speed and bypassing the data encoder when retransmitting using a second transmission speed; interleaving the locally formatted data that includes data encoded at the data encoder when retransmitting using the first transmission speed and data encoded through bypassing the data encoder when retransmitting using the second transmission speed; wherein interleaving includes interleaving a first portion of the locally formatted data and a second portion of the locally formatted data over a broadcast frame that includes sub frames; wherein the first portion is for transmission at a first latency and the second portion is for transmission at a second latency, the second latency being lower than the first latency; and wherein each sub frame includes data associated with the first portion and data associated with the second portion that are interleaved together; and retransmitting the interleaved locally formatted data from a localcast transmitter to a local area.