Modeling of a reduce bit rate speech coding
Abstract
The purpose of this project is to develop a model that can be used as speech coding system with a reduced bit rate to optimize the quantization of channel bandwidth at a
reduced cost. The performance of the developed system will be evaluated and
compared with the existing, favored coding technique that is compounded Pulse Code
Modulation (PCM) at the standard rate of 64 kbit/s as for the application in digital
telephony. The Delta Modulation (DM) system is using one code digital signal and it
brings output signal amplitude as a replace the original amplitude see through a Pulse
Code Modulation (PCM). It’s has done integrated a output modulation and then
compared with input signal to comparator. After that, one pulse code is transmitted and
the polarities will be decrease signal differentiator to modulation. From the observation, Delta Modulation (DM) system are more easier than Pulse Code Modulation (PCM) system specifically transmitter and receiver hardware and otherwise the performance of Delta Modulation (DM) is almost the same like Pulse Code Modulation (PCM).