Differential Pulse Code Modulation (DPCM)

Differential pulse-code modulation (DPCM) is a signal encoder that uses the baseline of pulse-code modulation (PCM) but adds some functionalities based on the prediction of the samples of the signal. The input can be an analog signal or a digital signal.

1. What is DPCM technique?
2. What is difference between PCM and DPCM?
3. What is the advantage of DPCM?
4. What is the difference between DPCM and DM?

What is DPCM technique?

The Differential Pulse Code Modulation (DPCM) method was used with a large success in the image compression [125], [153], [159]. This technique is based on removing redundant information, existing between consecutive image sequences, and coding only new information, which is passed with new image elements.

What is difference between PCM and DPCM?

DPCM is same as the PCM technique used for remodeling analog signal into digital signal. DPCM has moderate signal to noise ratio. DPCM differs from PCM as a result of it quantizes the distinction of the particular sample and expected price. that's the explanation it's referred to as differential PCM.

What is the advantage of DPCM?

DPCM requires less Bandwidth than PCM for transmitting the same signal. DPCM is used to decrease quantization noise. The number of quantized levels is increased in DPCM. In DPCM the difference between successive sample is quantized.

What is the difference between DPCM and DM?

DM is the simplest form of differential pulse-code modulation (DPCM) where the difference between successive samples is encoded into n-bit data streams. In delta modulation, the transmitted data are reduced to a 1-bit data stream.