Questions tagged [dpcm]
5 questions
4
votes
3 answers
What is the need for prediction filter in PCM and DPCM?
The DPCM works by the difference between actual samples and predicted samples.
If we already have the actual samples, we can quantize it and encode it later.
But why we use prediction filter?
And by the definition "predicts the present samples…
Venkat Karthik
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1 answer
Differential Pulse Code Modulation (DPCM)
In the following figure we see an encoder and a decoder of a Delta Modulation System, which is a simple DPCM System with a 1-bit quantizer:
We assume that signal $x(n)$ is known, that $\hat{x}(-1)=0$ and that there is not noise in the…
MJ13
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DPCM Encoder and Decoder Simulation in MATLAB
I am trying to simulate DPCM in order to understand how it works. I am trying to implement the simplest version of DPCM which has a system scheme like in figure 1.
Sorry for the quality of the picture but this was the best I could get. Let me do…
Furkan Küçük
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1
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3 answers
Is the incoming sample in a standard DPCM already quantized?
I began learning about DPCM and i've got one issue I am not sure about:
Is the incoming sample m[k] (see image for reference) already quantizied or not? I think it is but with an (assumed) very fine quanitization. So the Quantiser block is doing a…
user20780
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0
votes
1 answer
What are the definitions of symbols and samples related to PCM?
What are the definitions of symbols and samples related to PCM? For example in binary encoding $\{0,1\}$ with 8 levels of quantization, is one symbol either of $ \ 0 \ or \ 1\ $? or is it the collection of $(x,y,z)$ where $x,y,z \ \epsilon \…
helloworld1e.
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