Difference Between Pulse Code Modulation (PCM) and Delta Modulation (DM)
PCM (Pulse Code Modulation) | DM (Delta Modulation) |
---|---|
PCM stands for Pulse Code Modulation. | DM stands for Delta Modulation. |
In PCM, feedback does not exist in transmitter or receiver. | While in DM, feedback exists in transmitter. |
Per sample 4, 8, or 16 bits are used. | Here, only one bit is used per sample. |
PCM requires highest transmitter bandwidth. | DM requires lowest transmitter bandwidth. |
PCM is complex in terms of complexity of implementation. | While DM is simple in terms of complexity of implementation. |
PCM has good signal to noise ratio. | While DM has poor signal to noise ratio. |
PCM is costly. | DM is cheap. |
PCM may be a technique wont to digitally represent sampled analog signals. | Digital to analog and analog to digital converter. |
In PCM, signal requires encoder and decoder both sides. | In DM, signal can modulate and demodulate. |
PM is mostly used in video telephony and audio telephony. | DM is mostly used in speeches as well as images. |
Difference between Pulse Code Modulation (PCM) and Delta Modulation (DM)
PCM stands for Pulse Code Modulation and DM stands for Delta Modulation. PCM is basically used for reworking analog to digital signals and DM is a conversion technique between analog and digital signals. In this article, we will discuss these two topics and also see the differences between these PCM and DM.