ROB BIT COMPENSATION SYSTEM AND METHOD ASSOCIATED WITH A TRANSMITTER OR CODEC

摘要

A rob bit compensation system improves the accuracy of digital signals transmitted to a digital network, such as a telephone network, that employs rob bit signaling (RBS) wherein the network periodically robs a bit for its own use. The rob bit compensation system can be employed within the transmit subsystem of a digital modem connected with the digital network that periodically robs a bit every nth frame. The system may also be employed in association with the communications path within a codec that transmits data to the digital network. A feedback system advises the rob bit compensation system as to which frames of outgoing digital data are to have a bit robbed therefrom by the digital network. The feedback system causes a quantiy to be mathematically combined with the digital data corresponding with each RBS frame in order to enhance accuracy of the RBS frames.