A vocoding apparatus, and method that reduces a real-time response burden acting on a digital signal processor to improve a performance of the DSP, minimize data loss due to slip occurrence, etc. and minimize data retransmission due to data loss. The vocoding apparatus includes a TDM switch for processing a voice signal and a data signal received from a mobile switching center according to a time division multiplexing method; a digital signal processor for receiving the voice signal and the data signal outputted from the switch and performing a certain digital signal processing; a signal delayer for adjusting an amount of the data signal transmitted from the switch to the Digital Signal Processor according to a load quantity of the Digital Signal Processor; and a CPU for controlling the Digital Signal Processor. |