Volume control for digital communication system

摘要

A technique for providing volume adjustment capabilities in a digital telecommunication system. A composite two-part address is applied to a memory which stores amplitude adjusted digital voice words. The first part of the address comprises the digital voice word carried by the TDM time slot. The second part of the address comprises a parameter which defines the extent of amplitude adjustment. The readout of the memory thereby defines a different digital voice word having a desired amplitude level. The second address part of the composite address is generated by an amplitude parameter memory in synchronism with each time slot so that the amplitude of the digital voice words in corresponding time slots can be adjusted independently and dynamically with respect to the others.