Filter Design Toolbox

Quantizer Data Functions

Filter Design Toolbox provides a number of data functions to retrieve information about a quantizer. These functions include:

• denormalmax -- the largest denormalized quantized number
• denormalmin -- the smallest denormalized quantized number
• eps -- the quantization level
• exponentbias -- the exponent bias of a quantizer
• exponentlength -- the exponent length of a floating-point quantizer
• exponentmax -- the maximum exponent allowable for a floating-point quantizer
• fractionlength -- the fraction length of a fixed-point quantizer
• range -- the numerical range of a quantizer
• realmax -- the largest positive number a quantizer can produce
• realmin -- the smallest positive normal number a quantizer can produce
• wordlength -- the word length of a quantizer

For example, to find the largest positive quantized number the default quantizer can create, type

• format long
  q = quantizer;
  r = realmax(q)
  
  r =
     0.99996948242188
  

Transformations for Quantized Data

Working with Quantized Filters