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Bit Depth

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Bit depth is maximal number of value digital signal measurement.

Distinguish  audio and video bit depth.

 
Bit-depth audio

Sound (oscillations of air) at each instant has different values.

Intensity of air pressure to ear changed in time.

The stronger the pressure changes, the louder the sound.

We have analog (uninterrupted) signal (air pressure).



Converting analog signal to digital format
Measurements of the value (of the air pressure power) at the each instant stored into memory.
By time the instants are spaced equally.

Bit depth audio is maximal value of the measurement (pressure).

Bit depth may be integer or floating point number.