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Questions tagged [pcm]

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6 questions with no upvoted or accepted answers
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Adaptive Delta Modulation: Logic for step size control at receiver

I read that in adaptive delta modulation, we have a block for step size control (diagram below) which takes into account the one bit quantizer output in a feedback loop and modulates it, the intent ...
1
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1answer
36 views

Question on PCM Sampling and Quantization order

I had a doubt in my mind regarding the orders of sampling and quantization in PCM. What is the impact if the order is reversed, that is, the continuous time signal is first quantized and then sampled? ...
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0answers
240 views

How to scale audio signal from PCM data to a dB SPL value?

I've got a set with MEMS microphones that measure audio signals at ultrasonic frequencies. The MEMS microphones have a PDM output which is then converted into PCM (this is necessary to allow for a ...
0
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1answer
308 views

Analyze PCM data

I am getting some 16 bit PCM data (raw bits) from a serial port . I need to collect this stream of bits using some python application running in PC and store it somewhere(Assume it in an array). I ...
0
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0answers
41 views

Number of binary digits in PCM

This is the problem from Shaum Otlines Analog and Digital Communications, Hwei Hsu Problem 5.13. It asks for number of binary digits in each sample if each sample at the receiving end of the system ...
0
votes
1answer
163 views

What is causing these spikes in the output of the low pass filter?

I am low pass filtering the PCM of an arbitrary Bell 103 (300 bps) signal. However, the output of the low pass filter shows random spikes in amplitude. I have tried to increase the bandwidth, but no ...