x=uquant(x); x=uquant(x,nbits,xmax,...);
uquant(x,nbits,xmax) simulates the effect of uniform quantization of x using nbits bits. The output is simply x rounded to \(2^{nbits}\) different values. The xmax parameters specify the maximal value that should be quantifiable.
uquant(x,nbits) assumes a maximal quantifiable value of 1.
uquant(x) additionally assumes 8 bit quantization.
uquant takes the following flags at the end of the input arguments:
| 'nbits' | Number of bits to use in the quantization. Default is 8. |
| 'xmax' | Maximal quantifiable value. Default is 1. |
| 's' | Use signed quantization. This assumes that the signal has a both positive and negative part. Useful for sound signals. This is the default. |
| 'u' | Use unsigned quantization. Assumes the signal is positive. Negative values are silently rounded to zero. Useful for images. |
If this function is applied to a complex signal, it will be applied to the real and imaginary part separately.