# Uniform quantization

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Instruction Manual (German)

Uniform quantization

Figure out these questions using the online simulation:

• Calculate and measure the quantization error power!
• Vary the signal amplitude and determine the respective Signal-to-quantization-noise ratios.
• Vary the bit per sample resolution and determine the respective SNRs.
• What probability distribution does the quantization error (usually) have?
• What exceptions can occur to this probability distribution?

Listen to signals using the audio play measure (right click on wire):

• How does music or speech sound for different quantization resolutions?
• How many bit per sample are required to understand the speech demo?
• Can you imagine how this wired quantization error signal will sound?

• Check the sound quality for low signal amplitudes.

External links Wikipedia: Quantization (signal processing)

 Click on source symbol Select and adjust input signal Click on Quantizer Vary the bit per sample resolution Right click on wire Open any measure for a signal
 8 bit quantized sine with a source amplitude of $u ^ =1,2V MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYd f9irVeeu0dXdh9vqqj=hEeeu0xXdbba9frFj0=OqFfea0dXdd9vqaq =JfrVkFHe9pgea0dXdar=Jb9hs0dXdbPYxe9vr0=vr0=vqpWqaaeaa biGaciaacaqabeaadaqaaqaaaOqaaiqadwhagaqcaiabg2da9iaaig dacaGGSaGaaGOmaiaadAfaaaa@3768@$ . Clipping Error of a sine signal with a source amplitude of $u ^ =1,2V MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYd f9irVeeu0dXdh9vqqj=hEeeu0xXdbba9frFj0=OqFfea0dXdd9vqaq =JfrVkFHe9pgea0dXdar=Jb9hs0dXdbPYxe9vr0=vr0=vqpWqaaeaa biGaciaacaqabeaadaqaaqaaaOqaaiqadwhagaqcaiabg2da9iaaig dacaGGSaGaaGOmaiaadAfaaaa@3768@$. The clipper is set to 1V. Probability density of a speech demo signal (laplace distribution). Probability density of the total error. 4 bit quantized sine signal. Total error of a 4 bit quantized sine signal. Signal-to-quantization-noise ratios of sine and triangle signals.