A method for common compensating for daq / rbs and method for improving the precision of digital data to be switched by means of a network

摘要

A compensation system (figure 2A) for improving the accuracy of digital signals that are communicated through a digital network (113, figure 1) by reducing loss from attenuation quantization (DAQ) and rob bit signaling (RBS). The combined DAQ/RBS compensation system can be employed within the transmitting modem (101) connected to the digital network. A first adjustment mechanism combines a DAQ compensation quantity with each segment of the digital data. Next, the word is communicated to a linear-mu-linear converter (201), which is configured to simulate a digital transmission by mu-low encoding each digital data word into a code word and then subsequently mu-low decoding each code word back into linear digital data word. The linear-mu-linear converter includes an RBS compensation system (129) that causes an RBS compensation quantity to be mathematically combined with each segment to be tainted by RBS. A second adjustment mechanism combines the reciprocal of the DAQ compensation quantity with the linear digital data from the linear-mu-linear converter. Finally, the linear digital data word is passed from the linear-mu-linear converter to a linear-mu-converter (208) for conversion into a mu-law code word and transmission to the network.