Sampling:& Quantization

Sampling
The process of grabbing the sound into small increments.

These small increments will later form a series of discrete values coded in binary format

Sampling Rate: How often the sound is grabbed, The higher the sampling rate, the more parts are grabbed, the better quality of sound & bigger file size

(Unit: kHz)

Sampling Rate most often used are 22.05 KHz (most common), 44.1KHz (common for audio CD), and 11.025KHz




Quantization


The process of rounding off a continuous value horizontally so that it can be represented by a fixed no of binary bits

Unit: bits (can use 8-bit, 16-bit and so on to quantize sound)

If u choose 8-bit of quantization level to quantize the analog sound, mean the analog sound will be divided into 256 parts.
Similarly, sound quantized at 16-bit divides the waves into 65,536 parts per second, just like 8-bit graphics can convey 256 colors and 16-bits can display 65,536 types of colors.

The larger the bit, the better the sound, the larger the file size