Pulse Code Modulation - Understanding Digital Transmission

In summary, the conversation discusses Pulse Code Modulation (PCM) and its role in converting analog signals to digital pulses and transmitting them to a receiver on a computer keyboard. It is questioned whether PCM is necessary for a digital keyboard, but it is noted that it may be useful for receiving data from analog devices such as a joystick or touchpad. The original question is confirmed to be accurate.
  • #1
jeejou
11
0
Hi everyone:smile:,

This is my question:
" Describe the concepts of PCM (Pulse Code Modulation) in a computer keyboard which its data are in digital format."


This is my justification:
How to describe the concepts of PCM ? Isn't PCM a technique used to transmit analog signals in digital transmission ? I mean, PCM converts the analog signals into digital pulses and then reconvert them back into its original form (analog) at the receiver of a system. So, can somebody please give me some clues to answer the question. :biggrin:

Thanks in advance.
 
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  • #2
You're right there is no sense in using PCM to talk between a digital keyboard and a computer.
It might make sense for receiving data from something like an analog joystick or touchpad, are you sure you read the question correctly?
 
  • #3
The question is correctly printed.

Describe the concepts of PCM (Pulse Code Modulation) in a computer keyboard which its data are in digital format.
 

FAQ: Pulse Code Modulation - Understanding Digital Transmission

1. What is Pulse Code Modulation (PCM)?

Pulse Code Modulation is a method of converting analog signals, such as audio or video, into digital signals for transmission or storage. It involves sampling the analog signal at regular intervals and then quantizing each sample into a digital code, which can then be transmitted through a digital channel.

2. How does PCM work?

PCM works by taking a continuous analog signal and sampling it at discrete intervals. Each sample is then quantized into a digital code, typically represented by binary numbers. These digital codes are then transmitted through a digital channel and can be reconstructed back into an analog signal at the receiving end.

3. What are the advantages of using PCM?

One of the main advantages of PCM is its ability to accurately represent analog signals in a digital format. It also allows for efficient transmission and storage of data, as digital codes take up less space than analog signals. Additionally, PCM is less susceptible to noise and interference compared to analog transmission.

4. What are the disadvantages of PCM?

One disadvantage of PCM is that it requires a higher bandwidth compared to analog signals for transmission. It also introduces quantization errors, which can result in a loss of information and affect the quality of the signal. Additionally, the conversion process from analog to digital and back can introduce latency, which may be undesirable in real-time applications.

5. How is PCM used in modern technology?

PCM is widely used in various technologies, such as telecommunications, audio and video recording, and digital broadcasting. It is also an essential component in digital audio formats, such as CDs and MP3s. PCM is also used in digital transmission systems, such as DSL and satellite communications, to efficiently transmit data over long distances.

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