Inventors:
David L. Leedke - Melbourne FL
Fred J. Studenberg - W. Melbourne FL
Assignee:
Rockwell International Corporation - El Segundo CA
International Classification:
H04J 308
Abstract:
Digitial audio data transmission technique which utilizes time division multiplexed messages, for transmitting information from point A to point B, while having intermediate points therebetween for augmenting the information without completely demodulating and remodulating the entire signal at each intermediate point. The technique comprises generating a clock signal having a plurality of pulses therein which are separated by a plurality of expansion regions. The expansion regions are utilized for containing the data information and the presence or absence of a pulse in the expansion region represents the message. Initially, the clock information and a message information is transmitted from point A along with a portion of the transmission containing clock information only and no message information. A remote terminal coupled by a directional coupler at one of the intermediate points monitors the message and transmits a message signal which is written on the existing signal during the portion of the transmission which has been previously assigned to that remote terminal, the initial transmission continues irrespective of any failure of the remote terminal to receive or transmit its augumentation to that message. The augmented message is later received at point B without having a complete demodulation and remodulation of the entire message at the point that the initial transmission was augmented.