The Full Form of ‘PCM’ in Electronics is ‘Pulse Code Modulation’.
Full Form of PCM
Pulse Code Modulation, commonly known as PCM, is a type of digital signal processing technique used to encode the analog signals into binary data. It is used in a variety of communication systems, such as cellular phones, digital radio and television broadcasts, fiber optic networks, satellite communications, and more.
The process of pulse code modulation involves converting an analog signal into a series of pulses that represent the varying levels of the analog waveform over time. This process is also referred to as sampling or digitization. The resulting set of pulses are then encoded using a binary code, known as Pulse Code Words (PCW).
To understand how PCM works, let’s look at an example of an analog waveform. Let’s assume that this waveform represents sound waves from a microphone. In order to convert this waveform into a series of discrete pulses for transmission over a digital network, it is necessary to sample the waveform at different points in time.
At each sampling point, the amplitude (or height) of the waveform is measured and assigned a numerical value. This number can be either positive or negative depending on whether the waveform rises or falls between consecutive samples. By taking multiple samples per second and assigning numerical values to each one, we can create what is known as a pulse-code modulated signal (PCM).
The PCM signal contains information about both the amplitude and frequency components of the original waveform. The frequency components are represented by how often samples are taken during each cycle of the waveform; this allows us to reconstruct the higher frequencies that may have been lost when sampling at lower rates. The amplitude components are represented by how large or small each sample is; this allows us to recreate dynamic range in our audio signals that may have been lost when encoding with lower bit depths.
Once all these components have been captured in our PCM signal, it can then be transmitted over any digital medium – such as copper wires or fiber optics – with minimal distortion or loss in quality due to noise interference. The advantage here is that less bandwidth is required for transmission than would be needed for an analog signal carrying equivalent information.
In conclusion, Pulse Code Modulation (PCM) is an important technology used in many areas of modern communication systems today due to its efficiency and accuracy when transmitting information via digital media formats such as copper wire or fiber optics. Its ability to capture both frequency and amplitude components makes it ideal for applications such as cellular phones and digital television broadcasts where high fidelity audio reproduction is desired without sacrificing bandwidth requirements.
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