Patent ID: 7844292
Filing Date: 2010-11-30
Classification: H04B

Abstract:
1. A voice communication system using in-band control signaling, comprising: a transmitting device; a voice input processor associated with the transmitted device and configured to output at least one analog voice signal based upon voice input, the analog voice signal being within a voice frequency band; a control signal encoder associated with the transmitting device and configured to generate at least one control carrier signal associated with at least one control signal, the control signal encoder further configured to utilize a pseudo-random code to modulate the control carrier signal to spread the control carrier signal over the voice frequency band; a combiner associated with the transmitting device and the control signal encoder, the combiner being configured to receive and combine the analog voice signal and the modulated control carrier signal to form a combined signal; first channel communication circuitry associated with the transmitting device and configured to transmit the combined signal through a communication channel; a receiving device configured to receive signals from the communication channel; second channel communication circuitry associated with the receiving device and configured to receive the combined signal from the communication channel; a splitter associated with the receiving device, the splitter being configured to receive the combined signal from the second channel communication circuitry and configured to split the combined signal into a voice path and a control path; a voice output processor for the voice path associated with the receiving device and configured to generate voice output signals from the combined signal, the voice output signals correlating to the voice input signals; and a control signal decoder for the control path associated with the receiving device and configured to demodulate the combined signal, the control signal decoder being further configured to use a pseudo-random code to determine if the modulated control carrier signal exists within the combined signal, the pseudo-random code correlating to the pseudo-random code used by the control signal decoder.