NONCOMPRESSED VOICE AND DATA COMMUNICATION OVER MODEM FOR A COMPUTER-BASED MULTIFUNCTION PERSONAL COMMUNICATIONS SYSTEM

摘要

The voice over data component of a personalcommunications system enables the operator tosimultaneously transmit voice and data communicationto a remote site. This voice over data functiondirectly encodes digitized voice samples onto thecarrier using quadrature amplitude modulation totransmit multiple bits of the voice sample for everybaud. The system also allocates selected bauds of thecarrier to voice and to data so the voice over datamay be transmitted using the same allocated bandwidth.The system may also dynamically reallocate thebandwidth over the telephone line depending on thedemands of the voice grade digitized signal.