17-05-2014, 04:56 PM
Pulse Code Modulation (PCM)
[attachment=63402]
Analog voice data must be translated into a series of binary digits before they can be transmitted.
With Pulse Code Modulation (PCM), the amplitude of the sound wave is sampled at regular intervals and translated into a binary number.
The difference between the original analog signal and the translated digital signal is called quantizing error.
Converting Samples to Bits
Quantizing
Similar concept to pixelization
Breaks wave into pieces, assigns a value in a particular range
8-bit range allows for 256 possible sample levels
More bits means greater detail, fewer bits means less detail
[attachment=63402]
Analog voice data must be translated into a series of binary digits before they can be transmitted.
With Pulse Code Modulation (PCM), the amplitude of the sound wave is sampled at regular intervals and translated into a binary number.
The difference between the original analog signal and the translated digital signal is called quantizing error.
Converting Samples to Bits
Quantizing
Similar concept to pixelization
Breaks wave into pieces, assigns a value in a particular range
8-bit range allows for 256 possible sample levels
More bits means greater detail, fewer bits means less detail